LTC1707

PRODUCTION

LTC1707

High Efficiency Monolithic Synchronous Step-Down Switching Regulator

PRODUCTION

Figure 1a. High Efficiency Low Dropout Step-Down Converter slide

Figure 1b. Efficiency vs Output Load Current slide

Figure 1a. High Efficiency Low Dropout Step-Down Converter

Figure 1b. Efficiency vs Output Load Current

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Part Models 4

1ku List Price Starting From $2.60

Features

600mA Output Current (V_IN ≥ 4V)
High Efficiency: Up to 96%
Constant Frequency: 350kHz Synchronizable to 550kHz
2.85V to 8.5V V_IN Range
0.8V Feedback Reference Allows Low Voltage Outputs: 0.8V ≤ V_OUT ≤ V_IN
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

Additional Details

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

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Support

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Visit the ADI Support Page

Ask the ADI community for help.

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FAQs

Sales & Ordering FAQs

Part Models 4

1ku List Price Starting From $2.60

Technical Documents 3

LTC1707: High Efficiency Monolithic Synchronous Step-Down Switching Regulator Data Sheet 08/19/2009

R384 Reliability Data 03/26/2018

DC257A - Demo Manual 09/24/2009

Design Resources 4

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)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC1707CS8#TRPBF	8-Lead SOIC (Narrow 0.15 Inch)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC1707IS8#PBF	8-Lead SOIC (Narrow 0.15 Inch)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC1707IS8#TRPBF	8-Lead SOIC (Narrow 0.15 Inch)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys

LTC1707CS8#PBF
Pin/Package Drawing
8-Lead SOIC (Narrow 0.15 Inch)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LTC1707CS8#TRPBF
Pin/Package Drawing
8-Lead SOIC (Narrow 0.15 Inch)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LTC1707IS8#PBF
Pin/Package Drawing
8-Lead SOIC (Narrow 0.15 Inch)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LTC1707IS8#TRPBF
Pin/Package Drawing
8-Lead SOIC (Narrow 0.15 Inch)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

PCN/PDN Information

Filter by Model

Part Models

Product Lifecycle

PCN

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

pdf

PCN22_0255_Form

xls

Material_Report

pdf

Qualification Results Summary

xlsm

Delta Qualification Matrix

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

pdf

PCN21_0026_Form

xls

Material_Report

xlsm

Delta Qualification Matrix

Filter by Model

Part Models

Product Lifecycle

PCN

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

pdf

PCN22_0255_Form

xls

Material_Report

pdf

Qualification Results Summary

xlsm

Delta Qualification Matrix

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

pdf

PCN21_0026_Form

xls

Material_Report

xlsm

Delta Qualification Matrix

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DC257A

LTC1707CS8 | 350kHz Constant Frequency Step Down Regulator, 1 or 2 Li-Ion or 2 to 6 NiCd Cell Input, 600mA Output

DC257A

LTC1707CS8 | 350kHz Constant Frequency Step Down Regulator, 1 or 2 Li-Ion or 2 to 6 NiCd Cell Input, 600mA Output

Buy Now View Details

Product Detail

DC257A: Demo Board for the LTC1707 High Efficiency Monolithic Synchronous Step-Down Switching Regulator.

Resources

PDF

DC257A - Demo Manual

218.00K

PDF

DC257A - Schematic

55.00K

ZIP

DC257A - Design File

276.00K

DC257A

LTC1707CS8 | 350kHz Constant Frequency Step Down Regulator, 1 or 2 Li-Ion or 2 to 6 NiCd Cell Input, 600mA Output

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