SC4211 Semtech Corporation, SC4211 Datasheet

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SC4211

Manufacturer Part Number
SC4211
Description
Very Low Input /Very Low Dropout 1 Amp Regulator
Manufacturer
Semtech Corporation
Datasheet

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The SC4211 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 1
amp. It operates with a Vin as low as 1.4V, with output
voltage programmable as low as 0.5V. The SC4211 fea-
tures ultra low dropout, ideal for applications where Vout
is very close to Vin. Additionally, the SC4211 has an en-
able pin to further reduce power dissipation while shut-
down. The SC4211 provides excellent regulation over varia-
tions in line, load and temperature.
The SC4211 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.
Revision October 18, 2004
POWER MANAGEMENT
Description
Typical Application Circuits
POWER MANAGEMENT
ENABLE
ENABLE
VIN
VIN
C1
C1
4
3
2
1
4
3
2
1
NC
VIN
EN
NC
NC
VIN
EN
NC
SC4211
SC4211
U1
U1
1
GND
GND
FB
FB
NC
VO
Features
Applications
NC
VO
Very Low Input /Very Low Dropout
5
6
7
8
5
6
7
8
Input Voltage as low as 1.4V
250mV dropout @ 1A
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
Telecom/Networking cards
Motherboards/Peripheral cards
Industrial Applications
Wireless infrastructure
Set top boxes
Medical equipment
Notebook computers
Battery powered systems
1 Amp Regulator With Enable
R1
R2
C2
C2
VO
VO
VO = 0.5V
0.5
(R1
R2
R2)
Volts
www.semtech.com
SC4211

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SC4211 Summary of contents

Page 1

... It operates with a Vin as low as 1.4V, with output voltage programmable as low as 0.5V. The SC4211 fea- tures ultra low dropout, ideal for applications where Vout is very close to Vin. Additionally, the SC4211 has an en- able pin to further reduce power dissipation while shut- down. The SC4211 provides excellent regulation over varia- tions in line, load and temperature ...

Page 2

... SC4211 ...

Page 3

... SC4211 µ ...

Page 4

... SC4211 ...

Page 5

... POWER MANAGEMENT Block Diagram VIN Vdd EN UVLO Thermal Shutdown + Vout - Vin Reverse Voltage Shutdown 2004 Semtech Corp. Rsense Vpump + - 5 SC4211 VOUT 0.5V Ref GND www.semtech.com ...

Page 6

... Component Selection Input capacitor: A large bulk capacitance of about 100uF should be closely placed to the input supply pin of the SC4211 to ensure that Vin does not sag below 1.4V. Also a minimum of 4.7µF ceramic recommended to be placed directly next to the Vin pin ...

Page 7

... POWER MANAGEMENT Outline Drawing - SOIC-8EDP Land Pattern - SOIC-8EDP 2004 Semtech Corp. 7 SC4211 www.semtech.com ...

Page 8

... POWER MANAGEMENT Contact Information Phone: (805)498-2111 FAX (805)498-3804 2004 Semtech Corp. Semtech Corporation Power Management Products Division 200 Flynn Road, Camarillo, CA 93012 8 SC4211 www.semtech.com ...

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