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LTC1504A

Linear Technology
Part Number LTC1504A
Manufacturer Linear Technology
Description 500mA Low Voltage Step-Down Synchronous Switching Regulator
Published Mar 27, 2005
Detailed Description LTC1504A 500mA Low Voltage Step-Down Synchronous Switching Regulator FEATURES s s s s s s s s s s DESCRIPTION The LTC®1...
Datasheet PDF File LTC1504A PDF File

LTC1504A
LTC1504A

Overview
LTC1504A 500mA Low Voltage Step-Down Synchronous Switching Regulator FEATURES s s s s s s s s s s DESCRIPTION The LTC®1504A is a self-contained, high efficiency synchronous buck switching regulator.
It includes a pair of on-chip 1.
3Ω power switches, enabling it to supply up to 500mA of load current.
Efficiency peaks at 92%, minimizing heat and wasted power.
The synchronous buck architecture allows the output to source or sink current as required to keep the output voltage in regulation.
100% duty cycle operation minimizes dropout voltage.
The LTC1504A is available in adjustable and fixed 3.
3V output versions.
An adjustable current limit circuit provides protection from overloads.
The internal 1% reference combined with a sophisticated voltage feedback loop provides optimum output voltage accuracy and fast load transient response.
The LTC1504A is specified to operate with input voltages between 4V and 10V.
Contact the LTC factory for guaranteed specifications at 2.
7V supply.
The LTC1504A is a pin-compatible, functional upgrade to the LTC1504.
The LTC1504A is available in a plastic SO-8 package.
, LTC and LT are registered trademarks of Linear Technology Corporation.
500mA Output Current at 3.
3V Output Up to 92% Peak Efficiency 100% Maximum Duty Cycle Internal Reference Trimmed to 1% Output Can Source or Sink Current Requires as Few as Four External Components Input Voltage Range: 4V to 10V Adjustable Current Limit Small SO-8 Package 200kHz Switching Frequency Can Typically be Synchronized Up to 500kHz U APPLICATIONS Daisy-Chained Control Outputs s s s s Small Portable Digital Systems Active Termination Auxiliary Output Voltage Supplies Minimum Part Count/Size Switchers TYPICAL APPLICATION Minimum Part Count 5V to 3.
3V Regulator NC IMAX 5V SHUTDOWN SHDN SW LEXT 50µH 3.
3V AT 500mA EFFICIENCY (%) 5V to 3.
3V Efficiency 100 90 80 70 60 50 40 30 20 1504A • TA01 + VCC CIN 22µF LTC1504A-3.
3 GND SS SENSE COMP 1000pF + COUT 47µF CIN: AVX TPSC226M016R0375 COUT: AVX ...


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