LTC1142
PRODUCTIONDual High Efficiency Synchronous Step-Down Switching Regulators
- Part Models
- 8
- 1ku List Price
- Starting From $11.21
Overview
- 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
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
Documentation
Data Sheet 1
Application Note 2
Design Note 3
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| LTC1142CG#PBF | 28-Lead SSOP | ||
| LTC1142CG#TRPBF | 28-Lead SSOP | ||
| LTC1142HVCG#PBF | 28-Lead SSOP | ||
| LTC1142HVCG#TRPBF | 28-Lead SSOP | ||
| LTC1142HVCG-ADJ#PBF | 28-Lead SSOP | ||
| LTC1142HVCG-ADJ#TRPBF | 28-Lead SSOP | ||
| LTC1142LCG-ADJ#PBF | 28-Lead SSOP | ||
| LTC1142LCG-ADJ#TRPBF | 28-Lead SSOP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Aug 6, 2022 - 22_0171 Laser Top Mark Conversion for SSOP Packages Assembled in PNG |
||
| LTC1142CG#PBF | PRODUCTION | |
| LTC1142CG#TRPBF | PRODUCTION | |
| LTC1142HVCG#PBF | PRODUCTION | |
| LTC1142HVCG#TRPBF | PRODUCTION | |
| LTC1142HVCG-ADJ#PBF | PRODUCTION | |
| LTC1142HVCG-ADJ#TRPBF | PRODUCTION | |
| LTC1142LCG-ADJ#PBF | PRODUCTION | |
| LTC1142LCG-ADJ#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| LTC3850 | PRODUCTION | Dual, 2-Phase Synchronous Step-Down Switching Controller |
Tools & Simulations
LTspice
Models for the following parts are available in LTspice:
- LTC1142
- LTC1142HV
- LTC1142HV-ADJ
- LTC1142L-ADJ
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.
Evaluation Kits
LTC1142CG | Triple Output (3.3V, 5V, 12V) Ultra High Efficiency Battery Step-Down PC Power Supply
Resources
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