SC4215A_07 Datasheet, PDF (1/9 Pages) Semtech Corporation – Very Low Input /Very Low Dropout 2 Amp Regulator With Enable

POWER MANAGEMENT
Description
The SC4215A is a high performance positive voltage
regulator designed for use in applications requiring very
low input voltage and very low dropout voltage at up to
2 amperes. It operates with a Vin as low as 1.4V, with
output voltage programmable as low as 0.5V. The
SC4215A features ultra low dropout, ideal for applica-
tions where Vout is very close to Vin. Additionally, the
SC4215A has an enable pin to further reduce power dis-
sipation while shut- down. The SC4215A provides ex-
cellent regulation over variations in line, load and tem-
perature.
The SC4215A is available in the SOIC-8EDP (Exposed Die
Pad) package. The output voltage can be set via an exter-
nal divider or to fixed settings of 0.5V and 1.2V depend-
ing on how the FB pin is configured.
Typical Application Circuits
SC4215A
Very Low Input /Very Low Dropout
2 Amp Regulator With Enable
Features
‹ Input Voltage as low as 1.4V
‹ 400mV dropout @ 2A
‹ Adjustable output from 0.5V
‹ Over current and over temperature protection
‹ Enable pin
‹ 10µA quiescent current in shutdown
‹ Full industrial temperature range
‹ Available in SOIC-8EDP Lead-free package, fully
WEEE and RoHS compliant
Applications
‹ Telecom/Networking cards
‹ Motherboards/Peripheral cards
‹ Industrial applications
‹ Wireless infrastructure
‹ Set top boxes
‹ Medical equipment
‹ Notebook computers
‹ Battery powered systems
VIN
ENABLE
U1
4 _NC
NC ⁵
3 _VIN
VO ⁶
VO
2 _EN
FB ⁷
1 _NC
GND ⁸
R1
SC4215A
VO = ^{0.5 (R1 + R2)} Volts
R2
C1
C2
R2
VIN
ENABLE
U1
4 _NC
3 _VIN
2 _EN
1 _NC
NC ⁵
VO ⁶
FB ⁷
GND ⁸
SC4215A
C1
VO
VO = 0.5V
VIN
ENABLE
C2
U1
4 _NC
3 _VIN
2 _EN
1 _NC
NC ⁵
VO ⁶
FB ⁷
GND ⁸
SC4215A
C1
VO
VO = 11.V2V
C2
Revision: April 25, 2007
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