SC112 [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： | SC112 |
| 厂家： | 
SEMTECH CORPORATION |
| 描述： | 150mA ULTRA LOW DROPOUT MICROPOWER LINEAR REGULATOR |
| 文件： | 总5页 (文件大小：61K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
150mA ULTRA LOW DROPOUT
MICROPOWER LINEAR REGULATOR
SC112
PRELIMINARY - July 25, 2000
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com
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.
•= Low dropout voltage
•= CMOS/TTL compatible control switch
•= Very low quiescent current 60µA (ON, no load)
•= Internal thermal shutdown
•= Short circuit protection
•= Very low standby current 0.1µA maximum (OFF)
•= Low noise with external bypass capacitor
•= Industrial temperature range
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
•= Battery powered systems
•= Cellular telephones
•= Cordless telephones
•= Pagers, personal digital assistants
•= Portable instrumentation
•= 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.
ORDERING INFORMATION
DEVICE(1)(2)
PACKAGE
SC112XXCSK.TR
6 pin SOT-23
Notes:
(1) Where XX denotes voltage options. Available volt-
ages are: 2.2V, 2.5V, 2.8V, 3.0V, 3.3V, 3.6V, 3.8V,
4.0V and 5.0V. Contact factory for additional voltage
options.
(2) Only available in tape and reel packaging. A reel
contains 3000 devices
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
1
© 2000 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
150mA ULTRA LOW DROPOUT
MICROPOWER LINEAR REGULATOR
SC112
PRELIMINARY - July 25, 2000
ABSOLUTE MAXIMUM RATINGS
Parameter
Symbol
VIN
Maximum
-0.3 to +16
-0.3 to VIN
Internally Limited
230
Units
Input Supply Voltage
V
V
Enable Input Voltage
VEN
Power Dissipation
PD
W
Thermal Resistance Junction to Ambient
Operating Ambient Temperature Range
Operating Junction Temperature Range
Storage Temperature Range
°C/W
°C
θJA
TA
-40 to +85
-40 to +125
-55 to +150
TA
°C
TSTG
°C
Lead Temperature (Soldering) 10 sec.
ESD Rating
TLEAD
ESD
300
2
°C
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 TYP MAX Units
VIN
Supply Voltage Range
Ground Pin Current
VIN
IGND
V
2.5
14.5
75
IO = 0mA
IO = 60mA
60
1.0
2.1
4.2
µA
90
1.25
1.5
mA
IO = 100mA
2.5
3.0
IO = 150mA
4.75
5.25
0.1
VIN = 8V, Output OFF
IO = 30 mA
µA
%
VO
Output Voltage
VO
-2.5
VO +2.5
-3.0
+3.0
Line Regulation
Load Regulation
REG(LINE) VIN = (VO(NOM) + 1V) to (VO(NOM) + 6V),
IO = 1mA
5
10
20
mV
mV
REG(LOAD)
IO = 1mA to 60mA
IO = 1mA to 100mA
IO = 1mA to 150mA
IO = 10mA
7.5
20
35
40
35
65
110
Temperature Coefficient
ppm/°C
2
∆VO/∆T
© 2000 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
150mA ULTRA LOW DROPOUT
MICROPOWER LINEAR REGULATOR
SC112
PRELIMINARY - July 25, 2000
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 TYP MAX Units
VO (Cont.)
Current Limit(1)
ILIM
VD
200
130
mA
mV
180
Dropout Voltage
IO = 60mA
IO = 100mA
IO = 150mA
150
180
195
225
245
275
165
200
60
Power Supply Rejection Ratio
Output Noise Voltage
RR
en
V
RIPPLE = 100mV(rms), f = 400Hz,
IO = 30mA
dB
30
µV(rms)
10 Hz ≤ f ≤ 80 kHz,
IO = 60mA
BYP
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.
3
© 2000 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
150mA ULTRA LOW DROPOUT
MICROPOWER LINEAR REGULATOR
SC112
PRELIMINARY - July 25, 2000
BLOCK DIAGRAM
PIN CONFIGURATION
APPLICATION HINTS (Refer to Sheet 1):
(1) CIN (C3) is needed if the device is far from the supply’s filter capac-
itors, or for operation from a battery. A value of 1.0µF or greater should
be used. CIN may be tantalum or ceramic.
Top View
(2) CO (C2) should be a 1µF or greater tantalum or ceramic capacitor,
with an Equivalent Series Resistance (ESR) between 10mΩ and 1Ω
over temperature. Larger value capacitors will improve the overall tran-
sient 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. Maxi-
mum EN voltage = VIN.
(5) Connect both ground pins (2 and 5) to ground to maximize heat
conduction.
SOT-23-6L
PIN DESCRIPTION
Pin #
Pin Name
EN
Description
1
2
3
4
5
6
Active high enable pin. Connect to VIN if not being used.
Ground pin. Use for heatsinking along with Pin #5.
Noise bypass pin. Connect a 10nF capacitor (required) between this pin and GND.
Regulator output, supplying a guaranteed 150mA.
Ground pin. Use for heatsinking along with Pin #2.
Power input pin.
GND
BYP
VO
GND
VIN
4
© 2000 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
150mA ULTRA LOW DROPOUT
MICROPOWER LINEAR REGULATOR
SC112
PRELIMINARY - July 25, 2000
DEVICE OUTLINE - SOT23-6L
MINIMUM LAND PATTERN - SOT23-6L
ECN00-1203
5
© 2000 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
相关型号：
©2020 ICPDF网 联系我们和版权申明