LTC1707
PRODUCTIONHigh Efficiency Monolithic Synchronous Step-Down Switching Regulator
- Part Models
- 4
- 1ku List Price
- Starting From $3.29
Overview
- 600mA Output Current (VIN ≥ 4V)
- High Efficiency: Up to 96%
- Constant Frequency: 350kHz Synchronizable to 550kHz
- 2.85V to 8.5V VIN Range
- 0.8V Feedback Reference Allows Low Voltage Outputs: 0.8V ≤ VOUT ≤ VIN
- No Schottky Diode Required
- 1.19V ±1% Reference Output Pin
- Selectable Burst Mode™ Operation/Pulse Skipping Mode
- Low Dropout Operation: 100% Duty Cycle
- Precision 2.7V Undervoltage Lockout
- Current Mode Control for Excellent Line and Load Transient Response
- Low Quiescent Current: 200µA
- Shutdown Mode Draws Only 11µA Supply Current
- Available in 8-Lead SO Package
The LTC1707 is a high efficiency monolithic current mode synchronous buck regulator using a fixed frequency architecture. The operating supply range is from 8.5V down to 2.85V, making it suitable for both single and dual lithium-ion battery-powered applications. Burst Mode operation provides high efficiency at low load currents. 100% duty cycle provides low dropout operation, extending operating time in battery-powered systems.
The switching frequency is internally set at 350kHz, allowing the use of small surface mount inductors. For noise sensitive applications it can be externally synchronized up to 550kHz. Burst Mode operation is inhibited during synchronization or when the SYNC/MODE pin is pulled low preventing low frequency ripple from interfering with audio circuitry. Soft-start is provided by an external capacitor.
The internal synchronous MOSFET switch increases efficiency and eliminates the need for an external Schottky diode, saving components and board space. Low output voltages down to 0.8V are easily achieved due to the 0.8V internal reference. The LTC1707 comes in an 8-lead SO package.
Applications
- Cellular Telephones
- Portable Instruments
- Wireless Modems
- RF Communications
- Distributed Power Systems
- Single and Dual Cell Lithium
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 |
|---|---|---|---|
| LTC1707CS8#PBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LTC1707CS8#TRPBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LTC1707IS8#PBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LTC1707IS8#TRPBF | 8-Lead SOIC (Narrow 0.15 Inch) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Oct 24, 2024 - 24_0246 Migrating Bottom Trace Code Marking to Top Side Laser Marking for SOIC_N Package |
||
| LTC1707CS8#PBF | PRODUCTION | |
| LTC1707CS8#TRPBF | PRODUCTION | |
| LTC1707IS8#PBF | PRODUCTION | |
| LTC1707IS8#TRPBF | PRODUCTION | |
|
Oct 12, 2022 - 22_0255 Epoxy Change from Henkel 8290 to 8290A for 8-Lead SOIC Package (PCN part 2 of 2) |
||
| LTC1707CS8#PBF | PRODUCTION | |
| LTC1707CS8#TRPBF | PRODUCTION | |
| LTC1707IS8#PBF | PRODUCTION | |
| LTC1707IS8#TRPBF | PRODUCTION | |
|
Jun 16, 2021 - 21_0026 Laser Top Mark for 8SOICN Assembled in ADPG, UTL and CRM |
||
| LTC1707CS8#PBF | PRODUCTION | |
| LTC1707CS8#TRPBF | PRODUCTION | |
| LTC1707IS8#PBF | PRODUCTION | |
| LTC1707IS8#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:
- LTC1707
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
LTC1707CS8 | 350kHz Constant Frequency Step Down Regulator, 1 or 2 Li-Ion or 2 to 6 NiCd Cell Input, 600mA Output
Resources
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