SC11223CSK.TR [SEMTECH]
150mA ULTRA LOW DROPOUT MICROPOWER LINEAR REGULATOR; 150毫安超低压差的微功耗线性稳压器
| 型号： | SC11223CSK.TR |
| 厂家： | 
SEMTECH CORPORATION |
| 描述： | 150mA ULTRA LOW DROPOUT MICROPOWER LINEAR REGULATOR |
| 文件： | 总5页 (文件大小：140K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SC112
150mA Ultra Low Dropout
Micropower Linear Regulator
PRELIMINARY
POWER MANAGEMENT
Description
Features
The SC112 is a 150mA ultra low dropout linear regulator
with a built in CMOS/TTL logic level enable, designed
specifically for battery powered applications where low
quiescent current and low dropout are critical for battery
longevity.
u Low dropout voltage
u CMOS/TTL compatible control switch
u Very low quiescent current 60µA (ON, no load)
u Internal thermal shutdown
u Short circuit protection
u Very low standby current 0.1µA maximum (OFF)
u Low noise with external bypass capacitor
u Industrial temperature range
u SOT-23-6 package
The SC112 uses a Semtech proprietary internal PNP
device for the pass element, providing a low dropout
voltage of 130mV at a load of 60mA.
The output noise is reduced to 30µV (typical) by placing a
very low leakage 10nF capacitor on pin 3 (noise bypass).
Applications
u Battery powered systems
u Cellular telephones
u Cordless telephones
u Pagers
u Personal digital assistants
u Portable instrumentation
u Low voltage systems
Each device contains a bandgap reference, error
amplifier, PNP pass element, thermal and current
limiting circuitry and resistor divider network for setting
output voltage.
The SC112 is packaged in a six lead SOT-23 surface
mount package for a very small footprint and it requires
only a 1µF capacitor on the output and a 0.01µF on the
bypass pin for a minimum number of external
components.
Typical Application Circuit
U1 SC112
1
6
5
4
EN
EN
VIN
VIN
VO
2
3
GND GND
BYP VO
C1
10nF
C2
1uF
C3
1uF
Notes:
(1) CIN (C3) is needed if the device is far from the supplys filter capacitors, or for operation from a battery. A value
of 1.0µF or greater should be used. CIN may be tantalum or ceramic.
(2) CO (C2) should be a 1µF or greater tantalum or ceramic capacitor, with an Equivalent Series Resistance (ESR)
between 10mW and 1W over temperature. Larger value capacitors will improve the overall transient response.
(3) CBYP (C1 - required) should be placed as close as possible to pin 3 and ground. A 10nF ceramic capacitor is
recommended.
(4) EN may be tied to VIN if the shutdown feature is not required. Maximum EN voltage = VIN.
(5) Connect both ground pins (2 and 5) to ground to maximize heat conduction.
Revision 1, January 2001
1
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SC112
PRELIMINARY
Units
POWER MANAGEMENT
Absolute Maximum Ratings
Parameter
Symbol
Maximum
Input Supply Voltage
VIN
VEN
PD
-0.3 to +16
-0.3 to VIN
Internally Limited
230
V
V
Enable Input Voltage
Power Dissipation
W
Thermal Resistance Junction to Ambient
Thermal Resistance Junction to Case
Operating Ambient Temperature Range
Operating Junction Temperature Range
Storage Temperature Range
°C/W
°C/W
°C
qJA
81
qJC
TA
-40 to +85
-40 to +125
-65 to 150
300
TJ
°C
TSTG
TLEAD
VESD
°C
Lead Temperature (Soldering) 10 Sec.
ESD Rating (Human Body Model)
°C
2
kV
Electrical Characteristics
Unless specified: TA = 25°C, VIN = (VO(NOM) + 1V), CIN = 1µF, CBYP = 10nF, CO = 1µF. Values in bold apply over full operating temperature range.
Parameter
Symbol
Test Conditions
Min
2.5
Typ
Max
Units
VIN
Supply Voltage Range
Ground Pin Current
VIN
IGND
14.5
75
V
IO = 0mA
IO = 60mA
60
1.00
2.1
µA
90
1.25
1.50
2.5
mA
IO = 100mA
3.0
IO = 150mA
4.20
4.75
5.25
0.1
µA
%
VIN = 8V, Output OFF
IO = 30mA
VO
Output Voltage
VO
-2.5
VO
5
+2.5
+3.0
10
-3.0
Line Regulation
REG(LINE)
VIN = (VO(NOM) + 1V) to (VO(NOM) + 6V),
IO = 1mA
mV
20
ã 2001 Semtech Corp.
2
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SC112
POWER MANAGEMENT
PRELIMINARY
Electrical Characteristics (Cont.)
Unless specified: TA = 25°C, VIN = (VO(NOM) + 1V), CIN = 1µF, CBYP = 10nF, CO = 1µF. Values in bold apply over full operating temperature range.
Parameter
Symbol
Test Conditions
Min
Typ
Max
Units
VO (Cont.)
Load Regulation
REG(LOAD)
IO = 1mA to 60mA
IO = 1mA to 100mA
IO = 1mA to 150mA
IO = 10mA
7.5
20
35
65
mV
35
110
Temperature Coefficient
Current Limit(1)
40
ppm/°C
mA
DVO/DT
ILIM
180
200
130
Dropout Voltage
VD
IO = 60mA
IO = 100mA
IO = 150mA
150
180
195
225
245
275
mV
165
200
60
30
dB
Power Supply Rejection Ratio
Output Noise Voltage
BYP
PSRR
en
VAC = 100mVRMS, f = 400Hz, IO = 30mA
µVRMS
10Hz £ f £ 80kHz, IO = 60mA
Noise Bypass Terminal Voltage
EN
VBYP
1.250
V
V
Enable Input Threshold Voltage
VIH
VIL
IEN
Output ON
Output OFF
1.8
0.5
10
Enable Input Bias Current
VEN = 1.8V, Output ON
6
µA
Note:
(1) As the load resistance further decreases, the SC112 folds back the output current to approximately 100mA at
VO = 0V.
ã 2001 Semtech Corp.
3
www.semtech.com
SC112
POWER MANAGEMENT
PRELIMINARY
Pin Configuration
Ordering Information
(1)(2)
Device
Package
Top View
SC112XXCSK.TR
SOT-23-6
Notes:
(1) Where XX denotes voltage options. Available voltages
are: 2.2V (22), 2.5V (25), 2.8V (28), 3.0V (30), 3.3V (33),
3.6V (36), 3.8V (38), 4.0V (40) and 5.0V (50). Contact
factory for additional voltage options.
(2) Only available in tape and reel packaging. A reel
contains 3000 devices.
SOT-23-6
Block Diagram
Pin Descriptions
Pin
Pin Pin Function
Name
1
EN
Active high enable pin. Connect to VIN if not
being used.
2
GND Ground pin. Use for heatsinking along with
Pin #5.
3
BYP No i s e b yp a s s p i n. C o nne c t a 1 0 nF
capacitor (required) between this pin and
GND.
4
5
6
VO Regulator output, supplying a guaranteed
150 mA.
GND Ground pin. Use for heatsinking along with
Pin #2.
VIN Power input pin.
ã 2001 Semtech Corp.
4
www.semtech.com
SC112
POWER MANAGEMENT
PRELIMINARY
Outline Drawing - SOT23-6
Minimum Land Pattern -SOT23-6
Contact Information
Semtech Corporation
Power Management Products Division
652 Mitchell Rd., Newbury Park, CA 91320
Phone: (805)498-2111 FAX (805)498-3804
ã 2001 Semtech Corp.
5
www.semtech.com
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