S-1170B19PD-OTETFG [SII]
HIGH RIPPLE-REJECTION AND LOW DROPOUT HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR; 高纹波抑制率低压差型高输出电流CMOS电压稳压器
| 型号： | S-1170B19PD-OTETFG |
| 厂家： | 
SEIKO INSTRUMENTS INC |
| 描述： | HIGH RIPPLE-REJECTION AND LOW DROPOUT HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR |
| 文件： | 总29页 (文件大小：392K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Rev.3.0_02
HIGH RIPPLE-REJECTION AND LOW DROPOUT HIGH OUTPUT CURRENT
CMOS VOLTAGE REGULATOR
S-1170 Series
The S-1170 Series is a positive voltage regulator with
a low dropout voltage, high output voltage accuracy,
and low current consumption developed based on
CMOS technology.
A built-in low on-resistance transistor provides a low
dropout voltage and large output current, a built-in
overcurrent protector prevents the load current from
exceeding the current capacitance of the output
transistor, and a built-in thermal shutdown circuit
prevents damage caused by the heat. An ON/OFF
circuit ensures a long battery life. Compared with the
voltage regulators using the conventional CMOS
process, a larger variety of capacitors are available,
including small ceramic capacitors. Small SOT-89-5
and 6-Pin HSON(A) packages realize high-density
mounting.
Features
1.5 V to 5.5 V, selectable in 0.1 V steps.
• Output voltage:
• High-accuracy output voltage:
• Low dropout voltage:
1.0%
120 mV typ. (3.0 V output product, IOUT = 300 mA)
During operation: 80 µA typ., 160 µA max.
During shutdown: 0.1 µA typ., 1.0 µA max.
800 mA output is possible (at VIN ≥ VOUT(S) + 1.0 V)*1
Ensures long battery life.
• Low current consumption:
• High current capability:
• Built-in ON/OFF circuit:
• Low ESR capacitor can be used: A ceramic capacitor of 4.7 µF or more can be used for the output
capacitor.
70 dB typ. (at 1.0 kHz)
• High ripple rejection:
Overcurrent of output transistor can be restricted.
Damage caused by heat can be prevented.
SOT-89-5, 6-Pin HSON(A)
• Built-in overcurrent protector:
• Built-in thermal shutdown circuit:
• Small package:
• Lead-free products
*1. Attention should be paid to the power dissipation of the package when the output current is large.
Applications
• Power supply for DVD and CD-ROM drives
• Power supply for battery-powered devices
• Power supply for personal communication device
• Power supply for note PCs
Packages
Package Name
Drawing Code
Tape
Package
UP005-A
PD006-A
Reel
UP005-A
PD006-A
SOT-89-5
6-Pin HSON(A)
UP005-A
PD006-A
1
Seiko Instruments Inc.
HIGH RIPPLE-REJECTION LOW DROPOUT HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR
Rev.3.0_02
S-1170 Series
Block Diagram
*1
VIN
VOUT
Overcurrent
protector
Thermal shutdown circuit
+
−
ON/OFF
circuit
ON/OFF
Reference
voltage circuit
VSS
*1. Parasitic diode
Figure 1
2
Seiko Instruments Inc.
HIGH RIPPLE-REJECTION LOW DROPOUT HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR
Rev.3.0_02
S-1170 Series
Product Name Structure
• The product types, output voltage, and package types for the S-1170 Series can be selected at the user’s
request. Refer to the “Product name” for the meanings of the characters in the product name and
“Product name list” for the full product names.
1. Product name
S-1170
x
xx
xx
–
xxx
TF
G
IC direction in tape specifications*1
Product abbreviation*2
Package abbreviation
UC: SOT-89-5
PD: 6-Pin HSON(A)
Output voltage
15 to 55
(E.g., when the output voltage is 1.5 V,
it is expressed as 15.)
Product type*3
A: ON/OFF pin negative logic
B: ON/OFF pin positive logic
*1. Refer to the taping specifications at the end of this book.
*2. Refer to the product name list.
*3. Refer to 3. Shutdown pin (ON/OFF pin) in the “ Operation”.
3
Seiko Instruments Inc.
HIGH RIPPLE-REJECTION LOW DROPOUT HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR
Rev.3.0_02
S-1170 Series
2. Product name list
Table 1
SOT-89-5
Output Voltage
6-Pin HSON(A)
S-1170B15UC-OTATFG
S-1170B16UC-OTBTFG
S-1170B17UC-OTCTFG
S-1170B18UC-OTDTFG
S-1170B19UC-OTETFG
S-1170B20UC-OTFTFG
S-1170B21UC-OTGTFG
S-1170B22UC-OTHTFG
S-1170B23UC-OTITFG
S-1170B24UC-OTJTFG
S-1170B25UC-OTKTFG
S-1170B26UC-OTLTFG
S-1170B27UC-OTMTFG
S-1170B28UC-OTNTFG
S-1170B29UC-OTOTFG
S-1170B30UC-OTPTFG
S-1170B31UC-OTQTFG
S-1170B32UC-OTRTFG
S-1170B33UC-OTSTFG
S-1170B34UC-OTTTFG
S-1170B35UC-OTUTFG
S-1170B36UC-OTVTFG
S-1170B37UC-OTWTFG
S-1170B38UC-OTXTFG
S-1170B39UC-OTYTFG
S-1170B40UC-OTZTFG
S-1170B41UC-OUATFG
S-1170B42UC-OUBTFG
S-1170B43UC-OUCTFG
S-1170B44UC-OUDTFG
S-1170B45UC-OUETFG
S-1170B46UC-OUFTFG
S-1170B47UC-OUGTFG
S-1170B48UC-OUHTFG
S-1170B49UC-OUITFG
S-1170B50UC-OUJTFG
S-1170B51UC-OUKTFG
S-1170B52UC-OULTFG
S-1170B53UC-OUMTFG
S-1170B54UC-OUNTFG
S-1170B55UC-OUOTFG
S-1170B15PD-OTATFG
S-1170B16PD-OTBTFG
S-1170B17PD-OTCTFG
S-1170B18PD-OTDTFG
S-1170B19PD-OTETFG
S-1170B20PD-OTFTFG
S-1170B21PD-OTGTFG
S-1170B22PD-OTHTFG
S-1170B23PD-OTITFG
S-1170B24PD-OTJTFG
S-1170B25PD-OTKTFG
S-1170B26PD-OTLTFG
S-1170B27PD-OTMTFG
S-1170B28PD-OTNTFG
S-1170B29PD-OTOTFG
S-1170B30PD-OTPTFG
S-1170B31PD-OTQTFG
S-1170B32PD-OTRTFG
S-1170B33PD-OTSTFG
S-1170B34PD-OTTTFG
S-1170B35PD-OTUTFG
S-1170B36PD-OTVTFG
S-1170B37PD-OTWTFG
S-1170B38PD-OTXTFG
S-1170B39PD-OTYTFG
S-1170B40PD-OTZTFG
S-1170B41PD-OUATFG
S-1170B42PD-OUBTFG
S-1170B43PD-OUCTFG
S-1170B44PD-OUDTFG
S-1170B45PD-OUETFG
S-1170B46PD-OUFTFG
S-1170B47PD-OUGTFG
S-1170B48PD-OUHTFG
S-1170B49PD-OUITFG
S-1170B50PD-OUJTFG
S-1170B51PD-OUKTFG
S-1170B52PD-OULTFG
S-1170B53PD-OUMTFG
S-1170B54PD-OUNTFG
S-1170B55PD-OUOTFG
1.5 V 1.0%
1.6 V 1.0%
1.7 V 1.0%
1.8 V 1.0%
1.9 V 1.0%
2.0 V 1.0%
2.1 V 1.0%
2.2 V 1.0%
2.3 V 1.0%
2.4 V 1.0%
2.5 V 1.0%
2.6 V 1.0%
2.7 V 1.0%
2.8 V 1.0%
2.9 V 1.0%
3.0 V 1.0%
3.1 V 1.0%
3.2 V 1.0%
3.3 V 1.0%
3.4 V 1.0%
3.5 V 1.0%
3.6 V 1.0%
3.7 V 1.0%
3.8 V 1.0%
3.9 V 1.0%
4.0 V 1.0%
4.1 V 1.0%
4.2 V 1.0%
4.3 V 1.0%
4.4 V 1.0%
4.5 V 1.0%
4.6 V 1.0%
4.7 V 1.0%
4.8 V 1.0%
4.9 V 1.0%
5.0 V 1.0%
5.1 V 1.0%
5.2 V 1.0%
5.3 V 1.0%
5.4 V 1.0%
5.5 V 1.0%
Remark Please contact the SII marketing department for products with an output voltage other than
those specified above or type A products.
4
Seiko Instruments Inc.
HIGH RIPPLE-REJECTION LOW DROPOUT HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR
Rev.3.0_02
S-1170 Series
Pin Configuration
Table 2
Symbol
SOT-89-5
Top view
Pin No.
Description
Shutdown pin
5
4
3
1
2
3
4
5
ON/OFF
VSS
GND pin
NC*1
No connection
Input voltage pin
Output voltage pin
VIN
VOUT
*1. The NC pin is electrically open.
The NC pin can be connected to VIN and VSS.
1
2
Figure 2
6-Pin HSON(A)
Top view
Table 3
6
5
4
Pin No.
Symbol
VOUT*1
VOUT*1
ON/OFF
VSS
Description
Output voltage pin
Output voltage pin
Shutdown pin
GND pin
Input voltage pin
Input voltage pin
1
2
3
4
5
6
VIN*2
1
2
3
VIN*2
Bottom view
1
2
3
*1. Short pins 1 and 2.
*1
*2
*2. Short pins 5 and 6.
6
5
4
*1. Connect the exposed thermal die
pad at shadowed area to the
board, and set electric potential
open or VSS.
However, do not use it as the
function of electrode.
*2. Be careful of the contact with
other wires because the pinch
lead has the same electric
potential as VSS.
Figure 3
5
Seiko Instruments Inc.
HIGH RIPPLE-REJECTION LOW DROPOUT HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR
Rev.3.0_02
S-1170 Series
Absolute Maximum Ratings
Table 4
(Ta = 25°C unless otherwise specified)
Parameter
Input voltage
Symbol
VIN
Absolute Maximum Rating
Unit
V
V
SS − 0.3 to VSS + 7
SS − 0.3 to VIN + 0.3
SS − 0.3 to VIN + 0.3
VON/OFF
VOUT
V
V
V
Output voltage
V
Power
SOT-89-5
6-Pin HSON(A)
PD
1000 *1
mW
dissipation
Operating ambient temperature
Storage temperature
Topr
Tstg
−40 to +85
−40 to +125
°C
°C
*1. At mounted on printed circuit board
[Mounted board]
(1) Board size :
40 mm×40 mm×t1.6 mm
(2) Cu wiring shear : 180 % at both sides
Caution The absolute maximum ratings are rated values exceeding which the product could suffer
physical damage. These values must therefore not be exceeded under any conditions.
1200
SOT-89-5
1000
800
600
400
200
0
6-Pin HSON(A)
Power
Dissipation
PD (mW)
0
50
100
150
Ambient Temperature Ta (°C)
Figure 4 Power Dissipation of Package (Mounted on Printed Circuit Board)
Caution Thermal shutdown circuit may operate when junction temperature is 150 °C.
6
Seiko Instruments Inc.
HIGH RIPPLE-REJECTION LOW DROPOUT HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR
Rev.3.0_02
S-1170 Series
Electrical Characteristics
Table 5
(Ta = 25°C unless otherwise specified)
Test
Parameter
Symbol
VOUT(E)
Conditions
Min.
Typ.
Max.
Unit
Circuit
VOUT(S) VOUT(S) VOUT(S)
Output voltage*1
V
IN = VOUT(S) + 1.0 V, IOUT = 100 mA
V
1
× 0.99
800*5
× 1.01
Output current*2
IOUT
Vdrop
VIN ≥ VOUT(S) + 1.0 V
mA
V
V
V
V
V
V
3
1
1
1
1
1
1
Dropout voltage*3
I
OUT = 300 mA
V
V
V
OUT(S) = 1.5 V
OUT(S) = 1.6 V
OUT(S) = 1.7 V
0.35
0.30
0.25
0.20
0.15
0.12
0.45
0.35
0.30
0.26
0.22
0.18
1.8 V ≤ VOUT(S) ≤ 2.0 V
2.1 V ≤ VOUT(S) ≤ 2.9 V
3.0 V ≤ VOUT(S) ≤ 5.5 V
∆VOUT1
∆VIN•VOUT
V
OUT(S) + 0.5 V ≤ VIN ≤ 6.5 V,
OUT = 100 mA
IN = VOUT(S) + 1.0 V,
1.0 mA ≤ IOUT ≤ 300 mA
IN = VOUT(S) + 1.0 V, IOUT = 10 mA,
−40°C ≤ Ta ≤ 85°C
Line regulation
Load regulation
0.05
0.3
100
% / V
1
1
1
2
I
V
∆VOUT2
30
mV
Output voltage
∆VOUT
∆Ta•VOUT
V
ppm
/ °C
150
80
temperature coefficient*4
Current consumption
during operation
Current consumption
during shutdown
Input voltage
Shutdown pin
input voltage “H”
Shutdown pin
input voltage “L”
Shutdown pin
input current “H”
Shutdown pin
input current “L”
Ripple rejection
V
IN = VOUT(S) + 1.0 V, ON/OFF pin = ON,
no load
IN = VOUT(S) + 1.0 V, ON/OFF pin = OFF,
no load
ISS1
160
µA
V
ISS2
VIN
0.1
1.0
6.5
µA
V
2
4
2.0
1.5
VSH
V
V
V
V
IN = VOUT(S) + 1.0 V, RL = 1.0 kΩ
V
VSL
ISH
ISL
IN = VOUT(S) + 1.0 V, RL = 1.0 kΩ
IN = 6.5 V, VON/OFF = 6.5 V
IN = 6.5 V, VON/OFF = 0 V
−0.1
−0.1
0.3
0.1
0.1
V
4
4
µA
µA
dB
dB
mA
°C
°C
4
VIN
=
VOUT(S)
1.0 kHz,
Vrip 0.5 Vrms,
IOUT 100 mA
+ 1.0 V,
1.5 V
≤
≤
VOUT(S)
≤
≤
3.0 V
5.5 V
70
5
f
=
∆
RR
=
3.1 V
VOUT(S)
65
5
=
V
IN = VOUT(S) + 1.0 V, ON/OFF pin = ON,
OUT = 0 V
Short-circuit current
Ishort
TSD
TSR
350
150
120
3
V
Thermal shutdown
detection temperature
Thermal shutdown
release temperature
Junction temperature
Junction temperature
7
Seiko Instruments Inc.
HIGH RIPPLE-REJECTION LOW DROPOUT HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR
Rev.3.0_02
S-1170 Series
*1. VOUT(S): Specified output voltage
VOUT(E): Actual output voltage at the fixed load
The output voltage when fixing IOUT(= 100 mA) and inputting VOUT(S) + 1.0 V
*2. The output current at which the output voltage becomes 95% of VOUT(E) after gradually increasing the output current.
*3. Vdrop = VIN1 − (VOUT3 × 0.98)
VOUT3 is the output voltage when VIN = VOUT(S) + 1.0 V and IOUT = 300 mA.
V
IN1 is the input voltage at which the output voltage becomes 98% of VOUT3 after gradually decreasing the input voltage.
*4. The change in temperature [mV/°C] is calculated using the following equation.
∆VOUT
∆Ta
∆VOUT
*1
*2
*3
[
mV /°C
]
= VOUT(S)
[
V
]
×
[
ppm /°C
]
÷1000
∆Ta • VOUT
*1. The change in temperature of the output voltage
*2. Specified output voltage
*3. Output voltage temperature coefficient
*5. The output current can be at least this value.
Due to restrictions on the package power dissipation, this value may not be satisfied. Attention should be paid to the power
dissipation of the package when the output current is large.
This specification is guaranteed by design.
8
Seiko Instruments Inc.
HIGH RIPPLE-REJECTION LOW DROPOUT HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR
Rev.3.0_02
S-1170 Series
Test Circuits
1.
+
A
VIN
VOUT
VSS
+
V
ON/OFF
Set to
power ON
Figure 5
2.
+
A
VIN
VOUT
VSS
ON/OFF
Set to
VIN or GND
Figure 6
3.
4.
+
VIN
VOUT
VSS
A
+
V
ON/OFF
Set to
power ON
Figure 7
VOUT
VSS
VIN
+
+
RL
A
ON/OFF
V
Figure 8
5.
VIN
VOUT
VSS
+
V
ON/OFF
RL
Set to
Power ON
Figure 9
9
Seiko Instruments Inc.
HIGH RIPPLE-REJECTION LOW DROPOUT HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR
Rev.3.0_02
S-1170 Series
Standard Circuit
Output
Input
VIN
VOUT
*2
*1
ON/OFF
CL
CIN
VSS
GND
Single GND
*1. CIN is a capacitor for stabilizing the input.
*2. A ceramic capacitor of 4.7 µF or more can be used for CL.
Figure 10
Caution The above connection diagram and constant will not guarantee successful operation.
Perform thorough evaluation using the actual application to set the constant.
Application Conditions
Input capacitor (CIN):
Output capacitor (CL):
ESR of output capacitor:
4.7 µF or more
4.7 µF or more
0.5 Ω or less
Caution A general series regulator may oscillate, depending on the external components selected.
Check that no oscillation occurs with the application using the above capacitor.
Selection of Input and Output Capacitors (CIN, CL)
The S-1170 Series requires an output capacitor between the VOUT and VSS pins for phase compensation.
A ceramic capacitor with a capacitance of 4.7 µF or more provides a stable operation in all temperature
ranges. When using an OS capacitor, tantalum capacitor, or aluminum electrolytic capacitor, a ceramic
capacitor with a capacitance of 4.7 µF or more and an ESR of 0.5 Ω or less is required.
The output overshoot and undershoot values, which are transient response characteristics, vary depending
on the output capacitor value. The required capacitance value for the input capacitor differs depending on
the application.
The recommended application values are, CIN = 4.7 µF or more and CL = 4.7 µF or more, however, perform
a thorough evaluation using the actual device, including evaluation of temperature characteristics.
10
Seiko Instruments Inc.
HIGH RIPPLE-REJECTION LOW DROPOUT HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR
Rev.3.0_02
S-1170 Series
Explanation of Terms
1. Low dropout voltage regulator
The low dropout voltage regulator is a voltage regulator whose dropout voltage is low due to its built-in
low on-resistance transistor.
2. Low ESR
A capacitor whose ESR (Equivalent Series Resistance) is low. The S-1170 Series enables use of a low
ESR capacitor, such as a ceramic capacitor, for the output-side capacitor CL. A capacitor whose ESR is
0.5 Ω or less can be used.
3. Output voltage (VOUT
)
The accuracy of the output voltage is ensured at 1.0% under the specified conditions of fixed input
voltage*1, fixed output current, and fixed temperature.
*1. Differs depending the product.
Caution If the above conditions change, the output voltage value may vary and exceed the
accuracy range of the output voltage. Please see the electrical characteristics and
attached characteristics data for details.
∆VOUT1
∆VIN •VOUT
4. Line regulation
Indicates the dependency of the output voltage on the input voltage. That is, the values show how much
the output voltage changes due to a change in the input voltage with the output current remaining
unchanged.
5. Load regulation (∆VOUT2
)
Indicates the dependency of the output voltage on the output current. That is, the values show how
much the output voltage changes due to a change in the output current with the input voltage remaining
unchanged.
6. Dropout voltage (Vdrop
)
Indicates the difference between the input voltage VIN1, which is the input voltage (VIN) at the point where
the output voltage has fallen to 98% of the output voltage value VOUT3 after VIN was gradually decreased
from VIN = VOUT(S) + 1.0 V, and the output voltage at that point (VOUT3 × 0.98).
Vdrop = VIN1 − (VOUT3 × 0.98)
11
Seiko Instruments Inc.
HIGH RIPPLE-REJECTION LOW DROPOUT HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR
Rev.3.0_02
S-1170 Series
∆VOUT
∆Ta •VOUT
7. Temperature coefficient of output voltage
The shadowed area in Figure 11 is the range where VOUT varies in the operating temperature range
when the temperature coefficient of the output voltage is 150 ppm/°C.
Ex. S-1170B28 Typ.
VOUT
[V]
+0.42 mV / °C
*1
VOUT(E)
−0.42 mV / °C
−40
25
Ta [°C]
85
*1. VOUT(E) is the value of the output voltage measured at 25°
Figure 11
A change in the temperature of the output voltage [mV/°C] is calculated using the following equation.
∆VOUT
∆Ta
∆VOUT
∆Ta • VOUT
*1
*2
*3
[
mV /°C
]
= VOUT(S)
[
V
]
×
[
ppm /°C
]
÷1000
*1. Change in temperature of output voltage
*2. Specified output voltage
*3. Output voltage temperature coefficient
12
Seiko Instruments Inc.
HIGH RIPPLE-REJECTION LOW DROPOUT HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR
Rev.3.0_02
S-1170 Series
Operation
1. Basic operation
Figure 12 shows the block diagram of the S-1170 Series.
The error amplifier compares the reference voltage (Vref) with Vfb, which is the output voltage resistance-
divided by feedback resistors Rs and Rf. It supplies the output transistor with the gate voltage necessary
to ensure a certain output voltage free of any fluctuations of input voltage and temperature.
VIN
*1
Current
Error
amplifier
supply
VOUT
−
+
Vref
Rf
Vfb
Reference voltage
circuit
Rs
VSS
*1. Parasitic diode
Figure 12
2. Output transistor
The S-1170 Series uses a low on-resistance P-channel MOS FET as the output transistor.
Be sure that VOUT does not exceed VIN + 0.3 V to prevent the voltage regulator from being damaged due
to inverse current flowing from VOUT pin through a parasitic diode to VIN pin.
13
Seiko Instruments Inc.
HIGH RIPPLE-REJECTION LOW DROPOUT HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR
Rev.3.0_02
S-1170 Series
3. Shutdown pin (ON/OFF pin)
This pin starts and stops the regulator.
When the ON/OFF pin is set to the shutdown level, the operation of all internal circuits stops, and the built-
in P-channel MOS FET output transistor between the VIN pin and VOUT pin is turned off to substantially
reduce the current consumption. The VOUT pin becomes the VSS level due to the internally divided
resistance of several hundreds kΩ between the VOUT pin and VSS pin.
The structure of the ON/OFF pin is as shown in Figure 13. Since the ON/OFF pin is neither pulled down
nor pulled up internally, do not use it in the floating state. In addition, note that the current consumption
increases if a voltage of 0.3 V to VIN − 0.3 V is applied to the ON/OFF pin. When the ON/OFF pin is not
used, connect it to the VSS pin if the logic type is “A” and to the VIN pin if it is “B”.
Table 6
Logic Type
ON/OFF Pin
“L”: Power on
“H”: Power off
“L”: Power off
“H”: Power on
Internal Circuits
Operating
Stopped
VOUT Pin Voltage
Set value
Current Consumption
A
A
B
B
ISS1
ISS2
ISS2
ISS1
VSS level
Stopped
VSS level
Operating
Set value
VIN
ON/OFF
VSS
Figure 13
14
Seiko Instruments Inc.
HIGH RIPPLE-REJECTION LOW DROPOUT HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR
Rev.3.0_02
S-1170 Series
4. Thermal shutdown circuit
The S-1170 Series implements a thermal shutdown circuit to protect the device from damage due to
overheating. When the junction temperature rises to 150°C (typ.), the thermal shutdown circuit operates
and the regulator operation stops. When the junction temperature drops to 120°C (typ.), the thermal
shutdown circuit is released and the regulator operation resumes.
If the thermal shutdown circuit starts operating due to self-heating, the regulator operation stops and the
output voltage falls. When the regulator operation has stopped, no self-heat is generated and the
temperature of the IC is lowered. When the temperature has dropped, the thermal shutdown circuit is
released, the regulator operation resumes, and self-heat is generated again. By repeating this procedure,
the output voltage waveform forms pulses. This phenomenon, stopping and resuming the regulator
operation, continues until the internal power consumption is reduced by reducing either the input voltage
or output current or both, or the ambient temperature is lowered.
Table 7
Thermal Shutdown Circuit
Operating: 150°C (typ.)
Released: 120°C (typ.)
VOUT Pin Voltage
VSS level
Set value
15
Seiko Instruments Inc.
HIGH RIPPLE-REJECTION LOW DROPOUT HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR
Rev.3.0_02
S-1170 Series
Precautions
• Wiring patterns for the VIN, VOUT and GND pins should be designed so that the impedance is low.
When mounting an output capacitor between the VOUT and VSS pins (CL) and a capacitor for stabilizing
the input between VIN and VSS pins (CIN), the distance from the capacitors to these pins should be as
short as possible.
• Note that the output voltage may increase when a series regulator is used at low load current (1.0 mA or
less).
• Generally a series regulator may cause oscillation, depending on the selection of external parts. The
following conditions are recommended for this IC. However, be sure to perform sufficient evaluation
under the actual usage conditions for selection, including evaluation of temperature characteristics.
Input capacitor (CIN):
Output capacitor (CL):
4.7 µF or more
4.7 µF or more
Equivalent series resistance (ESR): 0.5 Ω or less
• The voltage regulator may oscillate when the impedance of the power supply is high and the input
capacitor is small or an input capacitor is not connected.
• The application conditions for the input voltage, output voltage, and load current should not exceed the
package power dissipation.
• Do not apply an electrostatic discharge to this IC that exceeds the performance ratings of the built-in
electrostatic protection circuit.
• In determining the output current, attention should be paid to the output current value specified in Table
5 in the “ Electrical Characteristics” and footnote *5 of the table.
• SII claims no responsibility for any disputes arising out of or in connection with any infringement by
products including this IC of patents owned by a third party.
16
Seiko Instruments Inc.
HIGH RIPPLE-REJECTION LOW DROPOUT HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR
Rev.3.0_02
S-1170 Series
Typical Characteristics
(1) Output Voltage vs. Output current (when load current increases)
S-1170B15 (Ta = 25°C)
S-1170B30 (Ta = 25°C)
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
V
IN = 3.5 V
V
IN = 2.0 V
4.0 V
2.5 V
6.5 V
6.5 V
0
200
400
600
800 1000 1200
0
200
400
600
800 1000 1200
IOUT [mA]
IOUT [mA]
S-1170B50 (Ta = 25°C)
6
5
4
3
2
1
0
V
IN = 5.5 V
6.0 V
6.5 V
Remark In determining the output current, attention
should be paid to the following.
1) The minimum output current value
and footnote *5 in the “ Electrical
Characteristics”
1200
800 1000
0
200
400
600
2) The package power dissipation
IOUT [mA]
(2) Output voltage vs. Input voltage
S-1170B15 (Ta = 25°C)
S-1170B30 (Ta = 25°C)
3.1
3.0
2.9
1.6
1.5
1.4
I
OUT = 1 mA
10 mA
I
OUT = 1 mA
10 mA
1.3
1.2
1.1
1.0
2.8
2.7
2.6
2.5
100 mA
300 mA
100 mA
300 mA
1.0
1.5
2.0
2.5
3.0
3.5
2.5
3.0
3.5
4.0
4.5
5.0
VIN [V]
VIN [V]
S-1170B50 (Ta = 25°C)
5.1
5.0
4.9
I
OUT = 1 mA
10 mA
4.8
4.7
4.6
4.5
100 mA
300 mA
4.5
5.0
5.5
VIN [V]
6.0
6.5
7.0
17
Seiko Instruments Inc.
HIGH RIPPLE-REJECTION LOW DROPOUT HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR
Rev.3.0_02
S-1170 Series
(3) Dropout voltage vs. Output current
S-1170B15
S-1170B30
0.6
0.5
0.4
0.3
0.2
0.1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
25°C
25°C
85°C
85°C
−40°C
−40°C
0
0
100 200 300 400 500 600 700 800
IOUT [mA]
0
100 200 300 400 500 600 700 800 900
IOUT [mA]
900
S-1170B50
0.6
0.5
0.4
0.3
0.2
0.1
25°C
85°C
−40°C
0
0
100 200 300 400 500 600 700 800
IOUT [mA]
900
(4) Dropout voltage vs. Set output voltage
0.8
800 mA
600 mA
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
300 mA
10 mA
1
2
3
5
6
0
4
VOTA [V]
18
Seiko Instruments Inc.
HIGH RIPPLE-REJECTION LOW DROPOUT HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR
Rev.3.0_02
S-1170 Series
(5) Output voltage vs. Ambient temperature
S-1170B15 (IOUT = 10 mA)
S-1170B30 (IOUT = 10 mA)
1.70
1.65
1.60
1.55
1.50
1.45
1.40
1.35
1.30
3.20
3.15
3.10
3.05
3.00
2.95
2.90
2.85
2.80
0
25
50
75 85
0
25
50
75 85
−40 −25
−40
−25
Ta [°C]
Ta [°C]
S-1170B50 (IOUT = 10 mA)
5.20
5.15
5.10
5.05
5.00
4.95
4.90
4.85
4.80
0
50
−40
25
75 85
−25
Ta [°C]
(6) Current consumption vs. Input voltage
S-1170B15 (Ta = 25°C)
S-1170B30 (Ta = 25°C)
80
70
60
50
40
30
20
10
0
80
70
60
50
40
30
20
10
0
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
VIN [V]
VIN [V]
S-1170B50 (Ta = 25°C)
80
70
60
50
40
30
20
10
0
0
1
2
3
4
5
6
7
VIN [V]
19
Seiko Instruments Inc.
HIGH RIPPLE-REJECTION LOW DROPOUT HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR
Rev.3.0_02
S-1170 Series
(7) Ripple rejection
S-1170B15 (Ta = 25°C)
S-1170B30 (Ta = 25°C)
VIN = 2.5 V, COUT = 4.7 µF
VIN = 4.0 V, COUT = 4.7 µF
100
80
100
80
I
OUT = 50 mA
I
OUT = 50 mA
60
60
100 mA
100 mA
40
40
20
0
20
0
10
1k
100
10k
100k
1M
10
1k
1M
100
10k
100k
Frequency [Hz]
Frequency [Hz]
S-1170B50 (Ta = 25°C)
VIN = 6.0 V, COUT = 4.7 µF
100
80
I
OUT = 50 mA
60
100 mA
40
20
0
1k
10
100
10k
100k
1M
Frequency [Hz]
20
Seiko Instruments Inc.
HIGH RIPPLE-REJECTION LOW DROPOUT HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR
Rev.3.0_02
S-1170 Series
Reference Data
(1) Input transient response characteristics
S-1170B15
S-1170B30
IOUT = 100 mA, tr = tf = 5.0 µs, COUT = 4.7 µF, CIN = 4.7 µF
IOUT = 100 mA, tr = tf = 5.0 µs, COUT = 4.7 µF, CIN = 4.7 µF
6.0
5.0
4.0
3.0
2.0
1.0
0
3.08
3.06
3.04
3.02
3.00
2.98
2.96
1.62
1.60
1.58
1.56
1.54
1.52
1.50
1.48
1.46
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
VIN
VIN
VOUT
VOUT
0
10
20
30
40
50
60
0
10
20
30
40
50
60
−20 −10
−20 −10
t [µs]
t [µs]
S-1170B50
IOUT = 100 mA, tr = tf = 5.0 µs, COUT = 4.7 µF, CIN = 4.7 µF
5.12
5.10
5.08
5.06
5.04
5.02
5.00
4.98
4.96
8.0
7.0
6.0
5.0
4.0
3.0
2.0
1.0
VIN
VOUT
600
0
10
20
30
40
50
−20 −10
t [µs]
(2) Load transient response characteristics
S-1170B15 (Ta = 25°C)
VIN = 2.5 V, COUT = 4.7 µF, CIN = 4.7 µF, IOUT = 50↔100 mA
S-1170B30 (Ta = 25°C)
VIN = 4.0 V, COUT = 4.7 µF, CIN = 4.7 µF, IOUT = 50↔100 mA
3.20
3.15
3.10
3.05
3.00
2.95
2.90
150
100
50
1.70
1.65
1.60
1.55
1.50
1.45
150
100
50
IOUT
IOUT
0
0
VOUT
VOUT
−50
−100
−150
−50
−100
−150
1.4020
0
20 40
60
80 100 120 140 160
0
20 40
60 80 100 120 140 160
−
−
20
t [µs]
t [µs]
S-1170B50 (Ta = 25°C)
VIN = 6.0 V, COUT = 4.7 µF, CIN = 4.7 µF, IOUT = 50↔100 mA
150
100
50
5.20
5.15
5.10
5.05
5.00
4.95
IOUT
0
VOUT
−50
−100
−150
4.9020
0
20
40
60
80 100 120 140 160
−
t [µs]
21
Seiko Instruments Inc.
HIGH RIPPLE-REJECTION LOW DROPOUT HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR
Rev.3.0_02
S-1170 Series
(3) Shutdown pin transient response characteristics
S-1170B15 (Ta = 25°C)
VIN = 2.5 V, COUT = 4.7 µF, CIN = 4.7 µF, IOUT = 100 mA
S-1170B30 (Ta = 25°C)
VIN = 4.0 V, COUT = 4.7 µF, CIN = 4.7 µF, IOUT = 100 mA
5
4
3
2
7
6
6
4
VON/OFF
VON/OFF
5
4
2
0
−2
−4
−6
3
1
2
3
0
2
1
−1
−2
90−3
VOUT
1
VOUT
0
0
−1
−1
−
10
0
10 20 30 40 50 60 70 80
−
10
0
10 20 30 40 50 60 70 80 90
t [µs]
t [µs]
S-1170B50 (Ta = 25°C)
VIN = 6.0 V, COUT = 4.7 µF, CIN = 4.7 µF, IOUT = 100 mA
9
6
7
5
3
VON/OFF
0
3
−3
−6
VOUT
1
−1
0
10 20 30 40 50 60 70 80 90
−
10
t [µs]
S-1170B15 (Ta = 25°C)
VIN = 2.5 V, COUT = 4.7 µF, CIN = 4.7 µF, IOUT = 300 mA
S-1170B30 (Ta = 25°C)
VIN = 4.0 V, COUT = 4.7 µF, CIN = 4.7 µF, IOUT = 300 mA
5
4
3
2
7
6
6
4
VON/OFF
VON/OFF
5
4
2
0
−2
−4
−6
3
1
2
3
0
2
1
−1
−2
90−3
VOUT
1
VOUT
0
0
−1
−1
0
10 20 30 40 50 60 70 80 90
−
10
0
10 20 30 40 50 60 70 80
−
10
t [µs]
t [µs]
S-1170B50 (Ta = 25°C)
VIN = 6.0 V, COUT = 4.7 µF, CIN = 4.7 µF, IOUT = 300 mA
9
6
7
5
3
VON/OFF
0
3
−3
−6
VOUT
1
−1
0
10 20 30 40 50 60 70 80 90
−
10
t [µs]
22
Seiko Instruments Inc.
4.5±0.1
1.6±0.2
1.5±0.1
5
4
1
2
3
1.5±0.1 1.5±0.1
0.4±0.05
0.3
0.4±0.1
0.4±0.1
45°
0.45±0.1
No. UP005-A-P-SD-1.1
TITLE
SOT895-A-PKG Dimensions
UP005-A-P-SD-1.1
No.
SCALE
UNIT
mm
Seiko Instruments Inc.
4.0±0.1(10 pitches : 40.0±0.2)
+0.1
-0
ø1.5
2.0±0.05
+0.1
-0
0.3±0.05
2.0±0.1
8.0±0.1
ø1.5
5° max.
4.75±0.1
3
4
2
1
5
Feed direction
No. UP005-A-C-SD-1.1
TITLE
SOT895-A-Carrier Tape
UP005-A-C-SD-1.1
No.
SCALE
UNIT
mm
Seiko Instruments Inc.
16.5max.
13.0±0.3
Enlarged drawing in the central part
(60°)
(60°)
No. UP005-A-R-SD-1.1
TITLE
SOT895-A-Reel
UP005-A-R-SD-1.1
No.
QTY.
SCALE
UNIT
1,000
mm
Seiko Instruments Inc.
2.90±0.1
0.5typ.
+0.1
-0.05
0.30
0.95±0.05
(1.5)
No. PD006-A-P-SD-4.0
HSON6A-A-PKG Dimensions
PD006-A-P-SD-4.0
TITLE
No.
SCALE
UNIT
The exposed thermal die pad has different
electric potential depending on the product.
mm
Confirm specifications of each product.
Do not use it as the function of electrode.
Seiko Instruments Inc.
1.5±0.1
4.0±0.1
2.0±0.05
ø1.55±0.05
0.2±0.05
ø1.05±0.05
4.0±0.1
3.3±0.1
3
1
6
4
Feed direction
No. PD006-A-C-SD-2.0
HSON6A-A-Carrier Tape
PD006-A-C-SD-2.0
TITLE
No.
SCALE
UNIT
mm
Seiko Instruments Inc.
12.5max.
9.0±0.3
Enlarged drawing in the central part
ø13±0.2
(60°)
(60°)
No. PD006-A-R-SD-1.0
HSON6A-A-Reel
PD006-A-R-SD-1.0
TITLE
No.
SCALE
UNIT
QTY.
3000
mm
Seiko Instruments Inc.
·
·
The information described herein is subject to change without notice.
Seiko Instruments Inc. is not responsible for any problems caused by circuits or diagrams described herein
whose related industrial properties, patents, or other rights belong to third parties. The application circuit
examples explain typical applications of the products, and do not guarantee the success of any specific
mass-production design.
·
·
·
When the products described herein are regulated products subject to the Wassenaar Arrangement or other
agreements, they may not be exported without authorization from the appropriate governmental authority.
Use of the information described herein for other purposes and/or reproduction or copying without the
express permission of Seiko Instruments Inc. is strictly prohibited.
The products described herein cannot be used as part of any device or equipment affecting the human
body, such as exercise equipment, medical equipment, security systems, gas equipment, or any apparatus
installed in airplanes and other vehicles, without prior written permission of Seiko Instruments Inc.
Although Seiko Instruments Inc. exerts the greatest possible effort to ensure high quality and reliability, the
failure or malfunction of semiconductor products may occur. The user of these products should therefore
give thorough consideration to safety design, including redundancy, fire-prevention measures, and
malfunction prevention, to prevent any accidents, fires, or community damage that may ensue.
·
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