SC553 Semtech Corporation, SC553 Datasheet

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SC553

Manufacturer Part Number
SC553
Description
150mA Ultra Low Dropout Adjustable Linear Regulator
Manufacturer
Semtech Corporation
Datasheet

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The SC553 is a low dropout linear regulator that
operates from a +2.25V to +6.5V input range and
delivers up to 150mA. A PMOS pass transistor allows
the low 75µA supply current to remain independent of
load, making these devices ideal for battery operated
portable equipment such as cellular phones, cordless
phones and personal digital assistants.
The SC553 has an adjust pin (ADJ) enabling the user to
set the output voltage anywhere from 1.25V to 6V. For a
low noise version, see SC1453 and for an error flag see
SC1457. Other features include low powered shutdown,
short circuit protection, thermal shutdown protection and
reverse battery protection. The SC553 comes in the tiny
5 lead SOT-23 package.
Revision: April 20, 2004
POWER MANAGEMENT
Description
Typical Application Circuit
VIN
C1
1uF
1
3
U1
IN
EN
2
GND
SC553
OUT
ADJ
1
5
4
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Features
Applications
Regulator with Adjustable Output
“5205” compatible pinout
2% output accuracy guaranteed over line, load and
temperature
Guaranteed 150 mA output current
Very small external components - designed to work
with ceramic capacitors
Output adjustable from 1.25V to 6V
Very low supply current
Thermal overload protection
Reverse battery protection
Low power shutdown
Full industrial temperature range
Surface mount packaging (5 pin SOT-23)
Battery Powered Systems
Cellular Telephones
Cordless Telephones
Personal Digital Assistants
Portable Instrumentation
Modems
PCMCIA cards
150mA Ultra Low Dropout
R1
R2
C2
1uF
V
VOUT
OUT
=
. 1
250
www.semtech.com
SC553
1
+
R
R
1
2

Related parts for SC553

SC553 Summary of contents

Page 1

... The SC553 has an adjust pin (ADJ) enabling the user to set the output voltage anywhere from 1.25V to 6V. For a low noise version, see SC1453 and for an error flag see SC1457 ...

Page 2

... www.semtech.com SC553 ° ° ° C ° C ° C ° µ µ ...

Page 3

... constraints. See IN www.semtech.com SC553 ...

Page 4

...   • +     www.semtech.com SC553 ...

Page 5

... Output capacitor - Semtech recommends a minimum capacitance of 1µF at the output with an equivalent series resistance (ESR) of < 1 the SC553 has been designed to be used with ceramic capacitors, it does not have to be used with ceramic capacitors, allowing the designer a choice. Increasing the bulk capacitance will further reduce output noise and improve the overall transient response ...

Page 6

... MAX ) With the standard SOT-23-5 Land Pattern shown at the end of this datasheet, and minimum trace widths, the thermal impedance junction to ambient for SC553 is 256°C/W. Thus no additional heatsinking is required for this example. The junction temperature can be reduced further (or higher power dissipation can be allowed) by the use of ...

Page 7

... Land Pattern - SOT-23-5 This land pattern is for reference only. Consult your manufacturing group to ensure you meet your company’s manufacturability guidelines. 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 7 SC553 www.semtech.com ...

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