LTC1159
PRODUCTIONHigh Efficiency Synchronous Step-Down Switching Regulators
- Part Models
- 18
- 1ku List Price
- Starting From $9.09
Overview
- Operation from 4V to 40V Input Voltage
- 20µA Supply Current in Shutdown
- High Efficiency Maintained Over Wide Current Range
- Current Mode Operation for Excellent Line and Load Transient Response
- Very Low Dropout Operation: 100% Duty Cycle
- Short-Circuit Protection
- Synchronous FET Switching for High Efficiency
- Adaptive Non-Overlap Gate Drives
- Ultrahigh Efficiency: Up to 95%
- Available in SSOP and SO Packages
The LTC1159 series is a family of synchronous step-down switching regulator controllers featuring automatic Burst Mode™ operation to maintain high efficiencies at low output currents. These devices drive external complementary power MOSFETs at switching frequencies up to 250kHz using a constant off-time current-mode architecture.
A separate pin and on-board switch allow the MOSFET driver power to be derived from the regulated output voltage providing significant efficiency improvement when operating at high input voltages. The constant off-time current-mode architecture maintains constant ripple current in the inductor and provides excellent line and load transient response. The output current level is user programmable via an external current sense resistor.
The LTC1159 automatically switches to power saving Burst Mode operation when load current drops below approximately 15% of maximum current. Standby current is only 300µA while still regulating the output and shutdown current is a low 20µA.
Applications
- Step-Down and Inverting Regulators
- Notebook and Palmtop Computers
- Portable Instruments
- Battery-Operated Digital Devices
- Industrial Power Distribution
- Avionics Systems
- Telecom Power Supplies
Documentation
Data Sheet 1
Design Note 1
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 |
|---|---|---|---|
| LTC1159CG#PBF | 20-Lead SSOP | ||
| LTC1159CG#TRPBF | 20-Lead SSOP | ||
| LTC1159CG-3.3#PBF | 20-Lead SSOP | ||
| LTC1159CG-3.3#TRPBF | 20-Lead SSOP | ||
| LTC1159CG-5#PBF | 20-Lead SSOP | ||
| LTC1159CG-5#TRPBF | 20-Lead SSOP | ||
| LTC1159CS#PBF | 16-Lead SOIC (Narrow 0.15 Inch) | ||
| LTC1159CS#TRPBF | 16-Lead SOIC (Narrow 0.15 Inch) | ||
| LTC1159CS-3.3#PBF | 16-Lead SOIC (Narrow 0.15 Inch) | ||
| LTC1159CS-3.3#TRPBF | 16-Lead SOIC (Narrow 0.15 Inch) | ||
| LTC1159CS-5#PBF | 16-Lead SOIC (Narrow 0.15 Inch) | ||
| LTC1159CS-5#TRPBF | 16-Lead SOIC (Narrow 0.15 Inch) | ||
| LTC1159IS#PBF | 16-Lead SOIC (Narrow 0.15 Inch) | ||
| LTC1159IS#TRPBF | 16-Lead SOIC (Narrow 0.15 Inch) | ||
| LTC1159IS-3.3#PBF | 16-Lead SOIC (Narrow 0.15 Inch) | ||
| LTC1159IS-3.3#TRPBF | 16-Lead SOIC (Narrow 0.15 Inch) | ||
| LTC1159IS-5#PBF | 16-Lead SOIC (Narrow 0.15 Inch) | ||
| LTC1159IS-5#TRPBF | 16-Lead SOIC (Narrow 0.15 Inch) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Aug 6, 2022 - 22_0173 Laser Top Mark Conversion for SOICN14 and SOICN16 Packages Assembled on ADPG [PNG] |
||
| LTC1159CG#PBF | PRODUCTION | |
| LTC1159CG#TRPBF | PRODUCTION | |
| LTC1159CG-3.3#PBF | PRODUCTION | |
| LTC1159CG-3.3#TRPBF | PRODUCTION | |
| LTC1159CG-5#PBF | PRODUCTION | |
| LTC1159CG-5#TRPBF | PRODUCTION | |
| LTC1159CS#PBF | PRODUCTION | |
| LTC1159CS#TRPBF | PRODUCTION | |
| LTC1159CS-3.3#PBF | PRODUCTION | |
| LTC1159CS-3.3#TRPBF | PRODUCTION | |
| LTC1159CS-5#PBF | PRODUCTION | |
| LTC1159CS-5#TRPBF | PRODUCTION | |
| LTC1159IS#PBF | PRODUCTION | |
| LTC1159IS#TRPBF | PRODUCTION | |
| LTC1159IS-3.3#PBF | PRODUCTION | |
| LTC1159IS-3.3#TRPBF | PRODUCTION | |
| LTC1159IS-5#PBF | PRODUCTION | |
| LTC1159IS-5#TRPBF | PRODUCTION | |
|
Oct 24, 2024 - 24_0246 Migrating Bottom Trace Code Marking to Top Side Laser Marking for SOIC_N Package |
||
| LTC1159CS#PBF | PRODUCTION | |
| LTC1159CS#TRPBF | PRODUCTION | |
| LTC1159CS-3.3#PBF | PRODUCTION | |
| LTC1159CS-3.3#TRPBF | PRODUCTION | |
| LTC1159CS-5#PBF | PRODUCTION | |
| LTC1159CS-5#TRPBF | PRODUCTION | |
| LTC1159IS#PBF | PRODUCTION | |
| LTC1159IS#TRPBF | PRODUCTION | |
| LTC1159IS-3.3#PBF | PRODUCTION | |
| LTC1159IS-3.3#TRPBF | PRODUCTION | |
| LTC1159IS-5#PBF | PRODUCTION | |
| LTC1159IS-5#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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LTspice
Models for the following parts are available in LTspice:
- LTC1159
- LTC1159-3.3
- LTC1159-5
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
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