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LTC1142L

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: 160mA/Output· Independent Mi...

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SeekIC No. : 004401385 Detail

LTC1142L: 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 Maintaine...

LTC1142L Data Sheet

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Part Number:
LTC1142L
Supply Ability:
5000

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

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Product Details

Description



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: 160mA/Output
· Independent Micropower Shutdown: IQ < 40mA
· 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


Application

· Notebook and Palmtop Computers
· Battery-Operated Digital Devices
· Portable Instruments
· DC Power Distribution Systems


Pinout

Connection Diagram


Description

The LTC®1142/LTC1142L/LTC1142HV are dual synchronous step-down switching regulator controllers featuring automatic Burst ModeTM operation to maintain high efficiencies at low output currents. The LTC1142/LTC1142L/LTC1142HV  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.




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