50mA ULTRA LOW DROPOUT, LOW NOISE
MICROPOWER LINEAR REGULATOR
SC2982
PRELIMINARY - March 10, 2000
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com
DESCRIPTION
FEATURES
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Ultra low dropout voltage - 100mV @ 50mA
Guaranteed 50mA output current
Low ground pin current at all loads
<1µA quiescent current in shutdown
Wide supply voltage range 2.5V to 16V in
Wide output voltage range
Excellent line regulation
Surface mount packaging (5 pin SOT-23)
Industrial temperature range
The SC2982 is a 50mA ultra low dropout linear
regulator with a built in CMOS/TTL logic level enable
switch, designed specifically for battery powered
applications where low quiescent current and low
dropout are critical for battery longevity.
The SC2982 uses a Semtech proprietary internal
PNP device for the pass element, providing a low
dropout voltage of 100mV at a load of 50mA, while
maintaining a ground pin current of 600µA.
APPLICATIONS
The output noise is reduced by placing a 10nF
capacitor on pin 4 (bypass).
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Battery Powered Systems
Cellular Telephones
Cordless Telephones
Pagers, Personal Digital Assistants
Portable Instrumentation
Each device contains a bandgap reference, error
amplifier, PNP pass element, thermal and current
limiting circuitry and resistor divider network for setting
output voltage.
Cameras, Portable Consumer Equipment
PCMCIA VCC & VPP Regulation/Switching
The SC2982 is packaged in a 5 pin SOT-23 surface
mount package for a very small footprint and it
requires only a 1µF capacitor on the output for a
minimum number of external components.
ORDERING INFORMATION
DEVICE
SC2982CSK-X.X(1)(2)
PACKAGE
5 pin SOT-23
Notes:
BLOCK DIAGRAM
(1) Where -X.X denotes voltage options. Available volt-
ages are: 1.8V, 2.5V, 2.8V, 3.0V, 3.3V, 3.6V, 3.8V,
4.0V and 5.0V.
(2) Add suffix ‘TR’ for tape and reel.
ABSOLUTE MAXIMUM RATINGS
Parameter
Symbol
VIN
Maximum Units
Input Supply Voltage
Power Dissipation
-0.3 to +20
V
PD
Internally
Limited
W
Thermal Resistance
256
°C/W
°C
θJA
Operating Ambient
Temperature Range
TA
-40 to +85
Operating Junction
Temperature Range
TJ
-40 to +125
°C
°C
°C
kV
PIN CONFIGURATION
Storage Temperature
Range
TSTG
TLEAD
ESD
-65 to +150
Lead Temperature
(Soldering) 10 Sec
300
2
ESD Rating (Human
Body Model)
1
© 2000 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320