SC4215A Datasheet, PDF (1/8 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
amp. It operates with a Vin as low as 1.4V, with output
voltage programmable as low as 0.5V. The SC4215A fea-
tures ultra low dropout, ideal for applications where Vout
is very close to Vin. Additionally, the SC4215A has an en-
able pin to further reduce power dissipation while shut-
down. The SC4215A provides excellent regulation over
variations in line, load and temperature.
SC4215A
Very Low Input /Very Low Dropout
2 Amp Regulator With Enable
Features
‹ Input Voltage as low as 1.4V
‹ 500mV dropout @ 2A
‹ Adjustable output from 0.5V to 3.3V
‹ Over current and over temperature protection
‹ Enable pin
‹ 10µA quiescent current in shutdown
‹ Low reverse leakage (output to input)
‹ Full industrial temperature range
‹ Available in SOIC-8EDP package
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 0.5V depending on how the FB pin is con-
figured.
Typical Application Circuits
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 = 1 V
C2
Revision April 29, 2005
1
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