LTC1142
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LTC1142

Dual High Efficiency Synchronous Step-Down Switching Regulators

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Part Details
Part Models 8
1ku List Price Starting From $8.86
Features
  • Dual Outputs: 3.3V and 5V or User Programmable
  • Ultra-High Efficiency: Over 95% Possible
  • Current Mode Operation for Excellent Line and Load Transient Response
  • High Efficiency Maintained over 3 Decades of Output Current
  • Low Standby Current at Light Loads: 160µA/Output
  • Independent Micropower Shutdown: IQ < 40µA
  • Wide VIN Range: 3.5V to 20V
  • Very Low Dropout Operation: 100% Duty Cycle
  • Synchronous FET Switching for High Efficiency
  • Available in Standard 28-Pin SSOP
Additional Details
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The LTC1142/LTC1142L/LTC1142HV are dual synchronous step-down switching regulator controllers featuring automatic Burst Mode operation to maintain high efficiencies at low output currents. The devices are composed of two separate regulator blocks, each driving a pair of external complementary power MOSFETs, at switching frequencies up to 250kHz, using a constant off-time current mode architecture providing constant ripple current in the inductor.

The operating current level for both regulators is user programmable via an external current sense resistor. Wide input supply range allows operation from 3.5V to 18V (20V maximum). Constant off-time architecture provides low dropout regulation limited only by the RDS(ON) of the external MOSFET and resistance of the inductor and current sense resistor.

The LTC1142 series is ideal for applications requiring dual output voltages with high conversion efficiencies over a wide load current range in a small amount of board space.

Applications

  • Notebook and Palmtop Computers
  • Battery-Operated Digital Devices
  • Portable Instruments
  • DC Power Distribution Systems
Part Models 8
1ku List Price Starting From $8.86

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
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Aug 6, 2022

- 22_0171

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Laser Top Mark Conversion for SSOP Packages Assembled in PNG

LTC1142CG#PBF

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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

DC026A

LTC1142CG | Triple Output (3.3V, 5V, 12V) Ultra High Efficiency Battery Step-Down PC Power Supply

Tools & Simulations

Tools & Simulations 1

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

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