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LTC3251-1.2

Features: ·Up to 500mA Output Current·No Inductors·2.7V to 5.5V Input Voltage Range·2x Efficiency Improvement Over LDOs·2-Phase, Spread Spectrum Operation for Low Input and Output Noise·Shutdown Disconnects Load from VIN·Adjustable Output Voltage Range: 0.9V to 1.6V Fixed Output Voltages: 1.2V, 1....

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SeekIC No. : 004402190 Detail

LTC3251-1.2: Features: ·Up to 500mA Output Current·No Inductors·2.7V to 5.5V Input Voltage Range·2x Efficiency Improvement Over LDOs·2-Phase, Spread Spectrum Operation for Low Input and Output Noise·Shutdown Dis...

LTC3251-1.2 Data Sheet

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Part Number:
LTC3251-1.2
Supply Ability:
5000

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  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

·Up to 500mA Output Current
·No Inductors
·2.7V to 5.5V Input Voltage Range
·2x Efficiency Improvement Over LDOs
·2-Phase, Spread Spectrum Operation for Low Input and Output Noise
·Shutdown Disconnects Load from VIN
·Adjustable Output Voltage Range: 0.9V to 1.6V Fixed Output Voltages: 1.2V, 1.5V
·Super Burst, Burst and Burst Defeat Operating Modes
·Low Operating Current: IIn= 35mA (Burst Mode® Operation)
·Super Burst Operating Current: IIn= 10mA
·Low Shutdown Current: IIN= 0.01mA Typ
·Soft-Start Limits Inrush Current at Turn-On
·Short-Circuit and Overtemperature Protected
·Available in a Thermally Enhanced 10-Pin MSOP Package


Application

·Handheld Devices
·Cellular Phones
·Portable Electronic Equipment
·DSP Power Supplies


Pinout

Connection Diagram


Specifications

VIN to GND ....................................................... 0.3V to 6V
MD0, MD1, MODE and FB to GND . ..... 0.3V to (VIN + 0.3V)
IOUT (Note 2) ........................................................... 650mA
Operating Temperature Range (Note 3) ... 40°C to 85°C
Storage Temperature Range .................. 65°C to 150°C
Lead Temperature (Soldering, 10 sec)..................... 300°C


Description

The LTC®3251/LTC3251-1.2/LTC3251-1.5 are 2-phase charge pump step-down DC/DC converters that produce a regulated output from a 2.7V to 5.5V input. The parts use switched capacitor fractional conversion to achieve twice the typical efficiency of a linear regulator. No inductors are required. VOUT is resistor programmable from 0.9V to 1.6V or fixed at 1.2V or 1.5V, with up to 500mA of load current available.

A unique 2-phase spread spectrum architecture of LTC3251/LTC3251-1.2/LTC3251-1.5 provides a very low noise regulated output as well as low noise at the input.* The parts have four operating modes: Continuous Spread Spectrum, Spread Spectrum with Burst Mode operation, Super BurstTM mode operation and shutdown.

Low operating current (35mA in Burst Mode operation, 10mA in Super Burst mode operation) and low external parts count make the LTC3251/LTC3251-1.2/LTC3251-1.5 ideally suited for space-constrained battery-powered applications. The parts are short-circuit and overtemperature protected, and are available in a thermally enhanced 10-pin MSOP package.




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