LTC1879
PRODUCTION1.2A Synchronous Step-Down Regulator with 15µA Quiescent Current
- Part Models
- 2
- 1ku List Price
- Starting From $6.00
Overview
- High Efficiency: Up to 95%
- Low Quiescent Current: Only 15µA with No Load
- 550kHz Constant Frequency Operation
- 2.65V to 10V Input Voltage Range
- VOUT from 0.8V to VIN, IOUT to 1.2A
- True PLL Frequency Locking from 350kHz to 750kHz
- Power Good Output Voltage Monitor
- Low Dropout Operation: 100% Duty Cycle
- Burst Mode® or Pulse Skipping Operation
- Current Mode Operation for Excellent Line and Load Transient Response
- Shutdown Mode Draws <1µA Supply Current
- ±2% Output Voltage Accuracy
- Overcurrent and Overtemperature Protected
- Available in 16-Lead SSOP Package
The LTC1879 is a high efficiency monolithic synchronous buck regulator using a constant frequency, current mode architecture. Operating supply current is only 15µA with no load and drops to <1µA in shutdown. The input supply voltage range of 2.65V to 10V makes the LTC1879 ideally suited for both single and dual Li-Ion battery-powered applications. 100% duty cycle provides low dropout operation, extending battery life in portable systems.
The switching frequency is internally set to 550kHz, allowing the use of small surface mount inductors and capacitors. For noise sensitive applications, the LTC1879 can be externally synchronized from 350kHz to 750kHz. Burst Mode operation is inhibited during synchronization or when the SYNC/MODE pin is pulled low.
The internal synchronous rectifier switch increases efficiency and eliminates the need for an external Schottky diode. Low output voltages are easily supported with a 0.8V feedback reference voltage. The LTC1879 is available in a 16-lead SSOP package.
Applications
- Cellular Telephones
- Portable Computers
- Wireless Modems
Documentation
Data Sheet 1
User Guide 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 |
|---|---|---|---|
| LTC1879EGN#PBF | 16-Lead SSOP (Narrow 0.15 Inch) | ||
| LTC1879EGN#TRPBF | 16-Lead SSOP (Narrow 0.15 Inch) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Oct 3, 2024 - 24_0235 (QSOP/SSOP PKG) Migrating Bottom Trace Code Marking to Top Side Laser Marking |
||
| LTC1879EGN#PBF | PRODUCTION | |
| LTC1879EGN#TRPBF | PRODUCTION | |
|
Oct 11, 2022 - 22_0235 Epoxy Change from Henkel 8290 to 8290A for GN Package |
||
| LTC1879EGN#PBF | PRODUCTION | |
| LTC1879EGN#TRPBF | PRODUCTION | |
|
Apr 6, 2022 - 22_0066 Laser Top Mark for 16QSOP Assembled in ADPG [PNG] |
||
| LTC1879EGN#PBF | PRODUCTION | |
| LTC1879EGN#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
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Tools & Simulations
LTspice
Models for the following parts are available in LTspice:
- LTC1879
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
LTC1879EGN | High Efficiency Synchronous Step-Down Regulator, 2.65V - 10V Input, 1.8V/2.5V/3.3VOUT @ 1.2A
Resources
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