150mA ULTRA LOW DROPOUT
MICROPOWER LINEAR REGULATOR
PRELIMINARY - July 25, 2000
SC112
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com
DESCRIPTION
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.
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 30碌V (typical) by
placing a very low leakage 10nF capacitor on pin 3
(noise bypass).
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 1碌F capacitor on the output and a 0.01碌F on the
bypass pin for a minimum number of external
components.
FEATURES
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Low dropout voltage
CMOS/TTL compatible control switch
Very low quiescent current 60碌A(chǔ) (ON, no load)
Internal thermal shutdown
Short circuit protection
Very low standby current 0.1碌A(chǔ) maximum (OFF)
Low noise with external bypass capacitor
Industrial temperature range
APPLICATIONS
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Battery powered systems
Cellular telephones
Cordless telephones
Pagers, personal digital assistants
Portable instrumentation
Low voltage systems
ORDERING INFORMATION
DEVICE
(1)(2)
PACKAGE
6 pin SOT-23
SC112XXCSK.TR
TYPICAL APPLICATION CIRCUIT
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
U1 SC112
EN
1
2
3
EN
VIN
6
5
4
VO
VIN
GND GND
BYP
VO
C1
10nF
C2
1uF
C3
1uF
1
漏 2000 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
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