RS5RJ1517A-T2-FA [RICOH]
Switching Regulator, Voltage-mode, 0.25A, 100kHz Switching Freq-Max, CMOS, PDSO8, SOP-8;
| 型号： | RS5RJ1517A-T2-FA |
| 厂家： | 
RICOH ELECTRONICS DEVICES DIVISION |
| 描述： | Switching Regulator, Voltage-mode, 0.25A, 100kHz Switching Freq-Max, CMOS, PDSO8, SOP-8 开关 光电二极管 |
| 文件： | 总29页 (文件大小：574K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
VFM STEP-UP DC/DC CONVERTER WITH
VOLTAGE REGULATOR AND DETECTOR
NO. EA-024-0204
RS5RJ SERIES
OUTLINE
The RS5RJ series are CMOS-based step-up DC/DC converter ICs equipped with a voltage regulator (VR) and
a voltage detector (VD). Each of these step-up DC/DC converter ICs consists of a VFM DC/DC converter, a linear
regulator and a voltage detector. These ICs are output-voltage-fixed type regulators which function as a linear
regulator when input voltage is high, and as step-up DC/DC converter + linear regulator when input voltage is
low, by using an inductor, a diode and a capacitor as external parts for the ICs.
Since a voltage detector is built in these ICs, the potentials such as the output voltage of DC/DC converters can
be monitored.
In addition, these step-up DC/DC converter ICs are suitable for battery-powered and hand-held instruments
because internal circuits can be turned off by the chip enable function so that the standby current can be mini-
mized.
FEATURES
...........................................
•
Low Supply Current
Typ. 15µA (RS5RJ3624A : VIN=3.0V,at no load)
Istandby=Max. 1.0µA (RS5RJxxxxA)
.....................................................
•
Standby Mode
Istandby=Max. 10.0µA (RS5RJxxxxB)
Operating Voltage VIN=1.2V to 10V
.......................
•
•
•
•
•
Low Voltage Operation Possible
High Output Voltage Accuracy
.........................
Fixed Output Voltage Accuracy 2.5ꢀ
2.5ꢀ
...................
High Detector Threshold Accuracy
Output Voltage can be set at User's request (refer to Selection Guide).
Voltage close to battery's voltage can be output because these ICs are of a step-up / step-down type
(Ex. a fixed voltage of 3V can be output by a 3V battery).
•
•
•
Built-in Protection Circuits for Lx Driver
Pin for External Driver is equipped, and a large current output can be obtained.
....................................................
Small Package
8pin SOP
APPLICATIONS
•
•
•
Power source for cameras, camcorders, and hand-held audio equipment.
Power source for small OA apparatus such as note type personal computers,and word processors.
Power source for hand-held communication appliances such as pagers,cordless telephones, and cellular phones.
1
RS5RJ
BLOCK DIAGRAM
OSC
VLX Limiter
VFM
1
VSS
8
LX
–
+
CE
2
3
4
EXT
VDD
VOUT
7
6
5
Vref1
VDOUT
VDIN
+
–
Vref2
–
+
SELECTION GUIDE
In the RS5RJ Series, the output voltage, the detector threshold, the version symbols, and the taping type for
the ICs can be selected at the user's request.
The selection can be made by designating the part number as shown below:
RS5RJxxxxx – xx ← Part Number
↑ ↑ ↑
a b c
↑
d
Code
Contents
Setting Output Voltage (VOUT):
Stepwise setting with a step of 0.6V in the range of 1.5V to 6.0V is possible.
a
Setting Detector Threshold Voltage (–VDET):
Stepwise setting with a step of 0.1V in the range of 1.2V to 5.0V is possible.
b
c
Designation of Version Symbols:
A: Operation of all the internal circuits is stopped by setting CE pin at VDD level.
B: Operation of only Step-up DC/DC converter is stopped by setting CE pin atVDD level.
Designation of Taping Type:
Ex. 8pin SOP : T1, T2
(refer to Taping Specification)
“T2” is prescribed as a standard.
d
For example, the product with Output Voltage 5.0V, Detector Threshold 4.5V, Version A, and Taping Type T1,
is designated by Part Number RS5RJ5045A-T1.
2
RS5RJ
PIN CONFIGURATION
•
8pin SOP
1
2
3
4
8
7
6
5
PIN DESCRIPTION
Pin No.
Symbol
Pin Description
1
VSS
Ground Pin
2
3
4
5
6
7
8
CE
VDOUT
VDIN
VOUT
VDD
Chip Enable Pin
Voltage Detector Output Pin.Nch Open Drain Output
Detection Input Pin of Voltage Detector
Output Pin for Regulator
Step-up Output. Power Supply Pin
External Transistor Drive Pin
EXT
LX
External Inductor Drive Pin.
3
RS5RJ
ABSOLUTE MAXIMUM RATINGS
Topt=25˚C,Vss=0V
Symbol
VDD
Item
Rating
Unit
V
Supply Voltage
Output Voltage
–0.3 to +12
VLX
LX Pin Voltage
Vss–0.3 to +12
Vss–0.3 to VDD+0.3
Vss–0.3 to VDD+0.3
Vss–0.3 to +12
Vss–0.3 to VDD+0.3
V
VEXT
VOUT
VDOUT
VCE
EXT Pin Voltage
VOUT Pin Voltage
VDOUT Pin Voltage
CE Pin Voltage
V
V
V
V
Input Voltage
to
+
A Version
B Version
Vss–0.3 VDD 0.3
VDIN
VDIN Pin Voltage
V
to +
12
Vss–0.3
250
50
300
mA
mA
mW
˚C
ILX
IEXT
Lx Pin Current
Inductor Drive Output Current
EXT Pin Current
PD
Power Dissipation
Topt
Tstg
Tsolder
Operating Temperature Range
Storage Temperature Range
Lead Temperature (Soldering)
–30 to +80
–55 to +125
260˚C, 10s
˚C
ABSOLUTE MAXIMUM RATINGS
Absolute Maximum ratings are threshold limit values that must not be exceeded even for an instant under any
conditions. Moreover, such values for any two items must not be reached simultaneously. Operation above
these absolute maximum ratings may cause degradation or permanent damage to the device. These are stress
ratings only and do not necessarily imply functional operation below these limits.
4
RS5RJ
ELECTRICAL CHARACTERISTICS
•
RS5RJ3624A,B
Topt=25˚C
Symbol
Item
Conditions
No load
Min.
1.2
Typ.
Max.
10
Unit
V
Note
VIN
VDD
Operation Input Voltage
Step-up Output Voltage
Oscillator Start-up Voltage
Hold-on Voltage
No load
3.99
4.10
0.9
4.21
1.2
V
Voscst
Vhold
fosc
No load
V
IOUT=1mA
0.7
80
65
V
MaximumOscillator Frequency
Oscillator Duty Cycle
Lx Output Voltage
100
80
120
90
kHz
ꢀ
Maxdty
VOL1
IOH1
IOL=50mA
0.5
V
Lx Leakage Current
Lx Voltage Limit
0.01 10.00
0.9
µA
V
VLXlim
VOH
LX Pin On
IEXT=–3mA,VDD=4.1V
IEXT=5mA,VDD=4.1V
IRL=–5mA
EXT Output Pch ON Voltage
EXT Output Nch ON Voltage
Output Voltage
3.6
V
VOL2
VOUT
VDIF
0.5
V
3.51
3.60
0.3
3.69
V
Dropout Voltage
IRL=–30mA
V
∆VOUT/∆IOUT Load Regulation
–30mA≤IRL≤0mA
100
2.46
240
0.5
mV
V
–VDET
VHYS
VOL3
IOH2
Detector Threshold
2.34
60
2.40
120
Detector Threshold Hysteresis
VDOUT ON Voltage
mV
V
IOL=5mA
VDOUT Leakage Current
VDIN “H” Input Current
VDIN “L” Input Current
CE “H” Input Voltage
CE “L” Input Voltage
CE “H” Input Current
CE “L” Input Current
0.01
5.00
5
µA
µA
µA
V
IVDINH
IVDINL
VCEH
VCEL
ICEH
VDIN=VDD
VDIN=Vss
–0.5
0.5
V
DD
–0.3
VDD
0.2VDD
0.5
0
V
CE=VDD
CE=Vss
–0.5
–0.5
µA
µA
ICEL
0.5
VIN=3V, L=100µH,
C=22µF, CE=Vss,
No load
IDD
Supply Current
Standby Current
15
30
µA
VIN=3V, L=100µH,
C=22µF, CE=VDD,
No load
1.0
µA
µA
Note1
Note2
Istandby
10.0
(Note 1) Standby current of Version A
(Note 2) Standby current of Version B
Please refer to Basic Circuit for Test Circuit.
5
RS5RJ
•
RS5RJ5045A,B
Symbol
Topt=25˚C
Item
Conditions
No load
Min.
1.2
Typ.
Max.
10
Unit
V
Note
VIN
VDD
Operation Input Voltage
Step-up Output Voltage
Oscillator Start-up Voltage
Hold-on Voltage
No load
5.36
5.50
0.9
5.64
1.2
V
Voscst
Vhold
fosc
No load
V
IOUT=1mA
0.7
80
65
V
MaximumOscillator Frequency
Oscillator Duty Cycle
Lx Output Voltage
100
80
120
90
kHz
ꢀ
Maxdty
VOL1
IOH1
IOL=50mA
0.5
V
Lx Leakage Current
Lx Voltage Limit
0.01 10.00
0.9
µA
V
VLXlim
VOH
LX Pin On
IEXT=–3mA,VDD=5.5V
IEXT=5mA,VDD=5.5V
IRL=–5mA
EXT Output Pch ON Voltage
EXT Output Nch ON Voltage
Output Voltage
5.0
V
VOL2
VOUT
VDIF
0.5
V
4.87
5.00
0.3
5.13
V
Dropout Voltage
IRL=–30mA
V
∆VOUT/∆IOUT Load Regulation
–30mA≤IRL≤0mA
100
4.62
450
0.5
mV
V
–VDET
VHYS
VOL3
IOH2
Detector Threshold
4.38
112
4.50
225
Detector Threshold Hysteresis
VDOUT ON Voltage
mV
V
IOL=5mA
VDOUT Leakage Current
VDIN “H” Input Current
VDIN “L” Input Current
CE “H” Input Voltage
CE “L” Input Voltage
CE “H” Input Current
CE “L” Input Current
0.01
5.00
5
µA
µA
µA
V
IVDINH
IVDINL
VCEH
VCEL
ICEH
VDIN=VDD
VDIN=Vss
–0.5
0.5
V
DD
–0.3
VDD
0.2VDD
0.5
0
V
CE=VDD
CE=Vss
–0.5
–0.5
µA
µA
ICEL
0.5
VIN=4V, L=100µH,
C=22µF, CE=Vss,
No load
IDD
Supply Current
Standby Current
20
40
µA
VIN=4V, L=100µH,
C=22µF, CE=VDD,
No load
1.0
µA
µA
Note1
Note2
Istandby
10.0
(Note 1) Standby current of Version A
(Note 2) Standby current of Version B
Please refer to Basic Circuit for Test Circuit.
6
RS5RJ
OPERATION OF STEP-UP DC/DC CONVERTER
Step-up DC/DC Converter charges energy in the inductor when Lx Transistor (LxTr) is ON, and discharges the
energy with the addition of the energy from Input Power Source thereto when LxTr is off, so that a higher output
voltage than the input voltage is obtained.
The operation will be explained with reference to the following diagrams:
< Basic Circuits >
< Current through L >
IL
i2
IL min
IL max
IOUT
VOUT
L
SD
topen
VIN
i1
t
LX Tr
CL
ton
toff
T=1/ fosc
Step.1 : LxTr is turned on and current IL (= i1 ) flows, so that energy is charged in L. At this moment, IL(=i1 ) is
increased from ILmin (= 0) to reach ILmax in proportion to the on-time period (ton) of LxTr.
Step.2 : When LxTr is turned off, Schottky diode (SD) is turned on in order that L maintains IL at ILmax, so that
current IL (= i2) is released.
Step.3 : IL (=i2) is gradually decreased, and in the case of discontinuous mode, IL reaches ILmin (=0) after a time
period of topen, so that SD is turned off.
In the case of the VFM control system, with the on-time period (ton) maintained constant, the output voltage
is maintained constant by controlling the oscillator frequency (fosc).
7
RS5RJ
OPERATION
100µH
VIN
VDD
LX
8
6
VOUT
VOUT
5
Pch Tr
OSC
VFM
100µF
–
+
+
–
22µF
1µF
LX Tr
Vref1
1
Vref2
VSS
FIG. A Diagram of RS5RJ including external circuits
1. VDD Output Voltage
VDD output voltage is shown in Fig. B.
(1) In the case of VIN–Vf≥VDD0:
In Area B, LxTr is maintained in an OFF state, so that VIN–Vf (V) is output as it is from VDD pin without
step-up operation.
(2) In the case of VIN–Vf <VDD0:
In Area A, this IC functions as Step-up DC/DC converter. The step-up operation will now be explained
with reference to FIG. A. The step-up operation is an operation for regulating the VDD output voltage by
comparing Vref1 and the VDD output voltage by error amplifier circuits and subjecting LxTr to on-time con-
trol by VFM circuits (i.e., by controlling the step-up operation).
2. VOUT Output Voltage
A constant voltage is output from VOUT pin, with above-mentioned the VDD output voltage being subjected to a
step-down operation by a linear regulator. This step-down operation will now be explained with reference to FIG. A.
The step-down operation is an operation for regulating the VDD output voltage by Pch Tr by comparing Vref2 and
the VDD output voltage.
VIN
: Input Voltage
Area A
VDD0
Area B
VDD
VDD0
: VDD Set Voltage
VOUT0 : VOUT Set Voltage
Vf : ON Voltage of Diode
VOUT
VDD0+Vf
VOUT0
1.2V
10V
Input Voltage (V)
FIG. B Output Voltage vs. Input Voltage characteristic
8
RS5RJ
TEST CIRCUITS
A
100µH
IIN
100µF
Note1
CIN
VIN
VSS
LX
EXT
VDD
CE
VDOUT
VDIN
Oscilloscope
VOUT
A
V
V
1µF
COUT
22µF
CVDD
Test Circuit 1
VSS
LX
VSS
LX
CE
Oscilloscope
EXT
VDD
CE
EXT
Oscilloscope
VDOUT
VDIN
VDOUT
VDIN
VDD
VOUT
VOUT
100kΩ
VIN
VIN
Test Circuit 3
Test Circuit 2
100µH
IIN
LX
VSS
A
CE
EXT
+
CIN
100µF
VIN
VDD
VDOUT
VDIN
OPEN
LX
EXT
VDD
VSS
VOUT
VDIN
A
VOUT
CE
VDOUT
VDIN
Digitizing Oscilloscope
5.5V
VOUT
33kΩ
Pulse Generator
Test Circuit 5
A
Digitizing Oscilloscope
(for Trigger)
Test Circuit 4
9
RS5RJ
100µH
1µF
IIN
A
+
CIN
VIN
LX
EXT
VDD
VSS
CE
VDOUT
Digitizing Oscilloscope
VDIN VOUT
+
CVDD
22µF
+
COUT
1µF
100Ω
A
Pulse Generator
Test Circuit 6
100µH
220Ω
VSS
CE
LX
100Ω
EXT
VIN
+
CIN
VDOUT
VDD
Pulse
Generator
1µF
Digitizing Oscilloscope
VDIN VOUT
+
+
COUT
1µF
CVDD
22µF
Test Circuit 7
L
D
VIN
VOUT
VDD
RS5RJ
Rb
Cb
NPN Tr
CIN
EXT
VDD
A
IIN
VOUT
VSS
Load
CE
CVDD
COUT
A
A
IOUT
IDD
Test Circuit 8
L
:47µH(SUMIDA ELECTRIC CD105)
:Schottky Diode (HITACHI HRP22)
:220µF(Aluminum electrolytic Type)
:220Ω
Cb
:0.01µF
D
CVDD :220µF(Aluminum electroltic Type)
COUT :1µF(Tantalum Type)
CIN
Rb
10
RS5RJ
By use of these test circuits,the typical characteristics were obtained as shown in the following pages:
Test Circuit 1:
Typical Characteristics 1) 2) 3) 4) 5) 9) 10) 13) 14) 16)
(Typical Characteristics 13) and 14) were measured by replacing the capacitor shown in
Note1 with a 1µF Capacitor)
Test Circuit 2:
Test Circuit 3:
Typical Characteristics 11) 12)
Typical Characteristics 7) 8)
Efficiency η is shown by the following formula:
η= (VOUT×IOUT) / (VIN×IIN)
Test Circuit 4:
Test Circuit 5:
Test Circuit 6:
Test Circuit 7:
Test Circuit 8:
Typical Characteristics 6)
Typical Characteristics 15)
Typical Characteristics 17)
Typical Characteristics 18)
Typical Characteristics 19) 20)
In this IC, input current at no load is defined as supply current.(CE=VSS).
And when CE=VDD, the input current (no load) is defined as standby current.
11
RS5RJ
TYPICAL CHARACTERISTICS
1) Output Voltage vs. Input Voltage (Topt=25˚C)
RS5RJ5045A
RS5RJ4036A
4.5
4.0
3.5
3.0
5.5
5.0
4.5
IOUT=10mA
IOUT=20mA
IOUT=30mA
IOUT=40mA
IOUT=10mA
IOUT=20mA
IOUT=30mA
IOUT=40mA
4.0
0
2
4
6
10
8
0
2
4
6
10
8
Input Voltage VIN(V)
Input Voltage VIN(V)
RS5RJ3624A
RS5RJ3531A
4.0
3.5
3.0
2.5
4.0
3.5
3.0
2.5
IOUT=10mA
IOUT=20mA
IOUT=30mA
IOUT=40mA
IOUT=10mA
IOUT=20mA
IOUT=30mA
IOUT=40mA
0
2
4
6
10
8
0
2
4
6
10
8
Input Voltage VIN(V)
Input Voltage VIN(V)
RS5RJ3329A
RS5RJ3027A
4.0
3.5
3.0
2.5
3.5
3.0
2.5
2.0
IOUT=10mA
IOUT=20mA
IOUT=30mA
IOUT=40mA
IOUT=10mA
IOUT=20mA
IOUT=30mA
IOUT=40mA
0
2
4
6
10
0
2
4
6
10
8
8
Input Voltage VIN(V)
Input Voltage VIN(V)
12
RS5RJ
2) Output Voltage vs. Output Current (Topt=25˚C)
RS5RJ4036A
RS5RJ5045A
4.5
5.5
4.0
3.5
3.0
5.0
VIN=5V
4.5
VIN=4V
VIN=2V VIN=3V
VIN=2V
VIN=3V VIN=4V
100
4.0
0
50
100
150
0
50
150
Output Current IOUT(mA)
Output Current IOUT(mA)
RS5RJ3624A
RS5RJ3531A
4.0
4.0
3.5
3.0
2.5
3.5
3.0
2.5
VIN=4V
VIN=2V
40
VIN=3V
80
VIN=2V
VIN=3V
20
0
60
100
0
50
100
150
Output Current IOUT(mA)
Output Current IOUT(mA)
RS5RJ3329A
RS5RJ3027A
4.0
3.5
3.5
3.0
2.5
3.0
2.5
2.0
VIN=3V
VIN=2V
40
VIN=3V
80
VIN=2V
40
20
0
60
80
100
20
0
60
100
Output Current IOUT(mA)
Output Current IOUT(mA)
13
RS5RJ
3) Ripple Voltage vs. Output Current (Topt=25˚C)
L=47µH
L=100µH
COUT=22µF
Tantalum
RS5RJ5045A
RS5RJ5045A COUT=22µF
Tantalum
120
120
100
80
100
4.0V
80
3.0V
4.0V
60
60
2.0V
40
20
0
40
3.0V
20
2.0V
VIN=1.2V
VIN=1.2V
0
0
10
20
30
40
50
0
10
20
30
40
50
60
Output Current IOUT(mA)
Output Current IOUT(mA)
L=220µH
COUT=22µF
Tantalum
L=100µH
COUT=47µF
Tantalum
RS5RJ5045A
RS5RJ5045A
120
120
4.0V
100
80
100
80
3.0V
60
60
4.0V
40
20
0
40
20
0
2.0V
3.0V
VIN=1.2V
2.0V
30 40
VIN=1.2V
0
10
20
30
40
50
60
0
10
20
50
60
Output Current IOUT(mA)
Output Current IOUT(mA)
L=100µH
RS5RJ5045A
COUT=100µF
Alminum electrolytic
120
100
80
4.0V
60
3.0V
40
20
0
2.0V
VIN=1.2V
20 30
Output Current IOUT(mA)
0
10
40
50
60
14
RS5RJ
4) Efficiency vs. Input Voltage (Topt=25˚C)
RS5RJ5045A
RS5RJ4036A
100
100
80
60
80
60
IOUT=40mA
IOUT=30mA
IOUT=20mA
IOUT=10mA
IOUT=40mA
IOUT=30mA
IOUT=20mA
IOUT=10mA
40
20
40
20
0
2
2
2
4
6
8
10
10
10
0
2
4
6
8
10
Input Voltage VIN(V)
Input Voltage VIN(V)
RS5RJ3624A
RS5RJ3531A
100
100
80
60
80
60
IOUT=40mA
IOUT=30mA
IOUT=20mA
IOUT=10mA
IOUT=40mA
IOUT=30mA
IOUT=20mA
IOUT=10mA
40
20
40
20
0
4
6
8
0
2
4
6
8
10
Input Voltage VIN(V)
Input Voltage VIN(V)
RS5RJ3329A
RS5RJ3027A
100
100
80
60
80
60
IOUT=40mA
IOUT=30mA
IOUT=20mA
IOUT=10mA
IOUT=40mA
IOUT=30mA
IOUT=20mA
IOUT=10mA
40
20
40
20
0
2
4
6
8
10
0
4
6
8
Input Voltage VIN(V)
Input Voltage VIN(V)
15
RS5RJ
5) Efficiency vs. Output Current (Topt=25˚C)
RS5RJ5045A
RS5RJ4036A
100
100
90
90
VIN=5V
80
80
VIN=4V
VIN=4V
VIN=3V
70
70
60
50
40
30
60
50
40
30
VIN=3V
VIN=2V
40
VIN=2V
0
20
60
80
100
0
20
40
60
80
100
Output Current IOUT(mA)
Output Current IOUT(mA)
RS5RJ3624A
RS5RJ3531A
100
90
100
90
80
80
VIN=4V
70
70
60
50
40
30
60
50
40
30
VIN=3V
VIN=2V
40
VIN=3V
VIN=2V
40
0
20
60
80
100
0
20
60
80
100
Output Current IOUT(mA)
Output Current IOUT(mA)
RS5RJ3329A
RS5RJ3027A
100
90
100
90
80
80
70
70
60
50
40
30
60
50
40
30
VIN=2V
40
VIN=3V
VIN=3V
VIN=2V
40
0
20
60
80
100
0
20
60
80
100
Output Current IOUT(mA)
Output Current IOUT(mA)
16
RS5RJ
6) Soft Start Time vs. Input Voltage
CVDD=22µF
COUT=47µF
CVDD=22µF
COUT=1µF
RS5RJ5045B
RS5RJ5045B
30
25
20
15
10
5
30
25
20
15
10
5
IOUT=40mA
10mA
IOUT=40mA
10mA
1mA
1mA
0
0
1
2
3
4
5
6
1
2
3
4
5
6
Input Voltage VIN(V)
Input Voltage VIN(V)
CVDD=22µF
COUT=100µF
7) Maximum Oscillator Frequency vs. Temperature
RS5RJ5045B
RS5RJ3624A
30
25
20
15
10
5
120
100
80
60
IOUT=40mA
10mA
1mA
40
20
0
0
1
2
3
4
5
6
0
40 60 80 100
–40 –20
20
Input Voltage VIN(V)
Temperature Topt (˚C)
8) Oscillator Duty Cycle vs.Temperature
9) Output Voltage (VDD) vs.Temperature
RS5RJ3624A
RS5RJ3624A
4.3
100
4.1
3.9
3.7
80
60
40
–40 –20
0
20 40 60 80 100
–40 –20
0
20 40 60 80 100
Temperature Topt (˚C)
Temperature Topt (˚C)
17
RS5RJ
10) Output Voltage vs. Temperature
11) Detector Threshold vs. Temperature
RS5RJ3624A
RS5RJ3624A
3.8
2.6
3.6
2.4
2.2
2.0
3.4
3.2
0
20 40 60 80 100
–40 –20
0
20 40 60 80 100
–40 –20
Temperature Topt (˚C)
Temperature Topt (˚C)
12) VD Output Voltage vs. VD Input Voltage
RS5RJ3624A
13) Supply Current vs. Input Voltage
RS5RJxxxxA
VDIN Pull-Up Resistor:100kΩ
100
5
80
4
3
2
1
0
RS5RJ5045A
RS5RJ3624A
60
RS5RJ3027A
40
20
0
10
0
2
4
6
8
12
0
1
2
3
4
5
Input Voltage VIN(V)
VD Input Voltage VDIN(V)
14) Stand-by Current vs.Temperature
15) VD Input Current vs. VD Input Voltage
RS5RJ5045A
RS5RJ3624x
VDD=5.5V
5
1.0
0.8
0.6
4
B version
3
0.4
0.2
0
2
1
A version
0
–40 –20
5
6
0
20 40 60
80 100
Temperature Topt (˚C)
0
1
2
3
4
VD Input Voltage VDIN(V)
18
RS5RJ
16) Start-up/Hold-on Voltage vs. Output Current
RS5RJ5045A
1.6
1.4
1.2
Vstart
1.0
0.8
0.6
Vhold
0.4
0.2
0
0
5
15
20
10
Output Current IOUT (mA)
19
RS5RJ
17) Load Transient Response
RS5RJ5045A
VIN=3.0V
COUT=1µF
6
5
4
3
2
1
0
180
150
120
90
Output Voltage
60
Output Current
4
30
1mA
0
12
–2
0
2
6
8
10
Time t (ms)
RS5RJ5045A
VIN=5.0V
COUT=1µF
6
5
4
3
2
1
180
150
120
90
Output Voltage
60
Output Current
4
30
1mA
0
–2
0
12
0
2
6
8
10
Time t (ms)
RS5RJ5045A
VIN=3.0V
COUT=47µF
6
5
4
3
2
1
180
150
120
90
Output Voltage
60
Output Current
30
1mA
0
–2
0
18
0
2
4
6
8
10
12
14
16
Time t (ms)
20
RS5RJ
RS5RJ5045A
VIN=5.0V
COUT=47µF
6
5
4
3
2
1
180
150
120
90
Output Voltage
60
Output Current
4
30
1mA
0
18
0
–2
0
2
6
8
10
12
14
16
Time t (ms)
RS5RJ5045A
VIN=3.0V
COUT=100µF
6
5
4
3
2
1
180
150
120
90
Output Voltage
60
Output Current
4
30
1mA
0
18
0
–2
0
2
6
8
10
12
14
16
Time t (ms)
RS5RJ5045A
VIN=5.0V
COUT=100µF
6
5
4
3
2
1
180
150
120
90
Output Voltage
60
Output Current
4
30
1mA
0
18
0
–2
0
2
6
8
10
12
14
16
Time t (ms)
21
RS5RJ
18) Line Transient Response
RS5RJ5045A
IOUT=1mA
COUT=1µF
14
12
10
8
5.4
5.3
5.2
5.1
5.0
4.9
4.8
4.7
4.6
4.5
4.4
Output Voltage
Input Voltage
4
6
4
12
–2
0
0
0
2
2
2
6
8
8
8
10
Time t (ms)
RS5RJ5045A
IOUT=1mA
COUT=1µF
14
12
10
8
5.4
5.3
5.2
5.1
5.0
4.9
4.8
4.7
4.6
4.5
4.4
Output Voltage
Input Voltage
4
6
4
12
–2
6
10
Time t (ms)
RS5RJ5045A
IOUT=30mA
COUT=1µF
5.4
5.3
5.2
5.1
5.0
4.9
4.8
4.7
4.6
4.5
4.4
14
12
10
8
Output Voltage
Input Voltage
4
6
4
12
–2
6
10
Time t (ms)
22
RS5RJ
RS5RJ5045A
IOUT=30mA
COUT=1µF
5.4
5.3
5.2
5.1
5.0
4.9
4.8
4.7
4.6
4.5
4.4
14
12
10
8
Output Voltage
Input Voltage
6
4
12
–2
0
0
0
2
2
2
4
6
8
8
8
10
Time t (ms)
RS5RJ5045A
IOUT=1mA
COUT=47µF
5.4
5.3
5.2
5.1
5.0
4.9
4.8
4.7
4.6
4.5
4.4
14
12
10
8
Output Voltage
Input Voltage
4
6
4
–2
6
10
12
Time t (ms)
RS5RJ5045A
IOUT=1mA
COUT=47µF
5.4
5.3
5.2
5.1
5.0
4.9
4.8
4.7
4.6
4.5
4.4
14
12
10
8
Output Voltage
Input Voltage
6
4
12
–2
4
6
10
Time t (ms)
23
RS5RJ
RS5RJ5045A
IOUT=30mA
COUT=47µF
5.4
5.3
5.2
5.1
5.0
4.9
4.8
4.7
4.6
4.5
4.4
14
12
10
8
Output Voltage
6
Input Voltage
4
4
12
–2
0
2
6
8
10
Time t (ms)
RS5RJ5045A
IOUT=30mA
COUT=47µF
5.4
5.3
5.2
5.1
5.0
4.9
4.8
4.7
4.6
4.5
4.4
14
12
10
8
Output Voltage
Input Voltage
6
4
12
–2
0
2
4
6
8
10
Time t (ms)
RS5RJ5045A
IOUT=1mA
COUT=100µF
5.4
5.3
5.2
5.1
5.0
4.9
4.8
4.7
4.6
4.5
4.4
14
12
10
8
Output Voltage
Input Voltage
6
4
14
–2
0
2
4
6
8
10
12
Time t (ms)
24
RS5RJ
RS5RJ5045A
IOUT=1mA
COUT=100µF
5.4
5.3
5.2
5.1
5.0
4.9
4.8
4.7
4.6
4.5
4.4
14
12
10
8
Output Voltage
Input Voltage
6
4
–2
0
2
4
6
8
10
12
14
Time t (ms)
RS5RJ5045A
IOUT=30mA
COUT=100µF
5.4
5.3
5.2
5.1
5.0
4.9
4.8
4.7
4.6
4.5
4.4
14
12
10
8
Output Voltage
Input Voltage
4
6
4
14
–2
0
2
6
8
10
12
Time t (ms)
RS5RJ5045A
IOUT=30mA
COUT=100µF
5.4
5.3
5.2
5.1
5.0
4.9
4.8
4.7
4.6
4.5
4.4
14
12
10
8
Output Voltage
Input Voltage
4
6
4
14
–2
0
2
6
8
10
12
Time t (ms)
25
RS5RJ
19) Output Voltage vs. VDD Output Currrent
RS5RJ5045A
RS5RJ5045A
IOUT=40mA
IOUT=20mA
6.0
5.8
5.6
5.4
6.0
5.8
5.6
5.4
5.2
5.0
4.8
4.6
VDD
VDD
5.2
5.0
VOUT
VOUT
2.0V 3.0V
4.8
4.0V
3.0V
4.0V
VIN=1.2V
2.0V
VIN=1.2V
4.6
500 600 700
0
100 200 300 400
0
100 200 300 400 500 600
VDD Output Current IDDOUT (mA)
700
VDD Output Current IDDOUT (mA)
20) Efficiency vs.VDD Output Current
RS5RJ5045A
RS5RJ5045A
IOUT=20mA
IOUT=60mA
6.0
5.8
5.6
5.4
100
90
80
70
60
50
40
30
20
10
0
3.0V
VDD
4.0V
5.2
5.0
4.8
4.6
VIN=1.2V
2.0V
VOUT
2.0V
3.0V
4.0V
VIN=1.2V
0
100 200 300 400 500 600 700
VDD Output Current IDDOUT (mA)
500 600 700
0
100 200 300 400
VDD Output Current IDDOUT (mA)
RS5RJ5045A
RS5RJ5045A
IOUT=40mA
IOUT=60mA
100
90
80
70
60
50
40
100
90
80
70
60
50
40
30
20
10
0
3.0V
4.0V
3.0V
4.0V
2.0V
30 VIN=1.2V
VIN=1.2V
2.0V
20
10
0
0
100 200 300 400 500 600 700
VDD Output Current IDDOUT (mA)
0
100 200 300 400 500 600 700
VDD Output Current IDDOUT (mA)
(VDD×IDDOUT) + (VOUT×IOUT)
VIN×IIN
(NOTE) Efficiency η at Typical Characteristics 20) is shown by the following formula:
×
100
η=
26
RS5RJ
BASIC CIRCUIT
VIN
Inductor
Vss
Lx
EXT
VDD
Diode
CE
VDD
VDOUT
VDIN
+
Capacitor
VOUT
Examples of Parts : Inductor : RCR-664D (100µH) ; Sumida Electric Co., Ltd.
Diode : MA721 (Schottky type) ; Matsushita Electronics Corporation
Capacitor : 22µF (Tantalum type)
27
RS5RJ
TYPICAL APPLICATIONS
• Current Boost Circuit 1
L
D
VOUT
VIN
PNP Tr
Rbe
Cbe
RS5RJ
EXT
Rb
NPN
Tr
VDD
CVDD
CIN
VOUT
Cb
CE
Vss
COUT
Examples of
Components
CD
:0.01µF
L
: 47µH(SUMIDA ELECTRIC CD105)
: Schottky Diode (HITACHI HRP22)
: 220µF(Aluminum electrolytic Type)
Cbe
:0.1µF(RS5RJ5045x, RS5RJ4036x, RS5RJ3624x)
100pF(RS5RJ3531x, RS5RJ3329x, RS5RJ3027x)
D
CIN
NPN Tr :2SD1628
PNP Tr :2SA1213
CVDD : 100µF(Tantalum type)/
220µF(Aluminum electroltic Type)
COUT : 47µF(Tantalum Type)
Rb
:220Ω
:12Ω
Rbe
• Current Boost Circuit 2 (High Efficiency Circuit)
L
D
VOUT
VIN
PNP Tr
Rbe
Rb1
Rb2
VDD
NPN
Tr
EXT
CVDD
EXT
RS5RJ
5045x
VDD
VOUT
CIN
Cb
CE
CE
RN5RG
Vss
COUT
50A
GND
(NOTE) High efficiency current boost circuit,using RS5RJ5045x with
RN5RG50A(Ricoh Voltage Regulator).
Examples of
Components
CD
: 0.01µF
L
: 47µH(SUMIDA ELECTRIC CD105)
: Schottky Diode (HITACHI HRP22)
: 33µF(Tantalum type)/
NPN Tr : 2SD1628
PNP Tr : 2SA1213
D
CIN
Rb1
Rb2
Rbe
: 220Ω
: 330Ω
: 10kΩ
: 220µF(Aluminum electrolytic Type)
CVDD : 33µF(Tantalum type)/
220µF(Aluminum electrolytic Type)
COUT : 47µF(Tantalum Type)
28
RS5RJ
APPLICATION HINTS
When using these ICs, be sure to take care of the following points:
•
•
•
Set external components as close as possible to the IC and minimize the connection between the compo-
nents and the IC. In particular, when an external component is connected to VOUT Pin, make minimum con-
nection with the capacitor.
Make sufficient grounding. A large current flows through VSS Pin by switching. When the impedance of the
VSS connection is high, the potential within the IC is varied by the switching current. This may result in
unstable operation of the IC.
Use capacitor with a capacity of 10µF or more, and with good high frequency characteristics such as tanta-
lum capacitor. We recommend the use of a capacitor with an allowable voltage which is at least three times
the output set voltage. This is because there may be the case where a spike-shaped high voltage is generat-
ed by the inductor when Lx transistor is turned off.
•
•
Take the utmost care when choosing a inductor. Namely, choose such an inductor that has sufficiently small
d.c. resistance and large allowable current, and hardly reaches magnetic saturation. When the inductance
value of the inductor is small, there may be the case where ILX exceeds the absolute maximum ratings at the
maximum load. Use an inductor with an appropriate inductance.
Use a diode of a Schottky type with high switching speed, and also take care of the rated current.
The performance of power source circuits using these ICs largely depends upon the peripheral components. Take
the utmost care in the selection of the peripheral components. In particular, design the peripheral circuits in such a
manner that the values such as voltage, current and power of each component, PCB patterns and the IC do not
exceed their respective rated values.
29
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