LTC1707CS8#TRPBF datasheet, PDF

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LTC1707CS8#TRPBF: DescriptionConv DC-DC 2.85V to 8.5V Synchronous Step Down Single-Out 0.8V to 8.5V 0.6A 8-Pin SOIC N T/R; File Size214KB，16 Pages; ManufacturerADI; Websitehttps://www.analog.com

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LTC1707CS8#TRPBF Overview

Conv DC-DC 2.85V to 8.5V Synchronous Step Down Single-Out 0.8V to 8.5V 0.6A 8-Pin SOIC N T/R

LTC1707CS8#TRPBF Parametric

Parameter Name	Attribute value
EU restricts the use of certain hazardous substances	Compliant
ECCN (US)	EAR99
Part Status	Active
HTS	8542.39.00.01
Type	Synchronous Step Down
Output Type	Adjustable
Switching Frequency (kHz)	385
Switching Regulator	Yes
Number of Outputs	1
Output Voltage (V)	0.8 to 8.5
Maximum Output Current (A)	0.6
Minimum Input Voltage (V)	2.85
Maximum Input Voltage (V)	8.5
Operating Supply Voltage (V)	2.85 to 8.5
Typical Quiescent Current (uA)	200
Line Regulation	0.01%/V
Efficiency (%)	96
Maximum Operating Temperature (°C)	125
Supplier Temperature Grade	Commercial
Packaging	Tape and Reel
Pin Count	8
Standard Package Name	SOP
Supplier Package	SOIC N
Mounting	Surface Mount
Package Height	1.5(Max)
Package Length	5(Max)
Package Width	3.99(Max)
PCB changed	8
Lead Shape	Gull-wing

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LTC1707

High Efficiency Monolithic

Synchronous Step-Down

Switching Regulator

FEATURES

DESCRIPTIO

600mA Output Current (V

≥

4V)

High Efficiency: Up to 96%

Constant Frequency: 350kHz Synchronizable

to 550kHz

2.85V to 8.5V V

Range

0.8V Feedback Reference Allows Low Voltage

Outputs: 0.8V

≤

OUT

≤

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 LTC

1707 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 op-

eration provides high efficiency at low load currents.

100% duty cycle provides low dropout operation, extend-

ing 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 synchro-

nized up to 550kHz. Burst Mode operation is inhibited

during synchronization or when the SYNC/MODE pin is

pulled low preventing low frequency ripple from interfer-

ing with audio circuitry. Soft-start is provided by an

external capacitor.

The internal synchronous MOSFET switch increases effi-

ciency 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.

, LTC and LT are registered trademarks of Linear Technology Corporation.

Burst Mode is a trademark of Linear Technology Corporation.

APPLICATIO S

Cellular Telephones

Portable Instruments

Wireless Modems

RF Communications

Distributed Power Systems

Single and Dual Cell Lithium

TYPICAL APPLICATIO

3V TO

8.5V

100

OUT

= 3.3V

= 6V

= 3.6V

22µF

16V

RUN

REF

15µH

249k

100µF

6.3V

OUT

3.3V

EFFICIENCY (%)

= 8.4V

LTC1707

SYNC/MODE

47pF

80.6k

GND

OUT

FOLLOWS V

FOR

3V < VIN < 3.3V

1707 F01a

100

OUTPUT CURRENT (mA)

1000

1707 F01b

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

Figure 1b. Efficiency vs Output Load Current

LTC1707CS8#TRPBF Related Products

	LTC1707CS8#TRPBF	LTC1707CS8#PBF	LTC1707CS8	LTC1707IS8#PBF	LTC1707IS8#TRPBF	LTC1707IS8
Description	Conv DC-DC 2.85V to 8.5V Synchronous Step Down Single-Out 0.8V to 8.5V 0.6A 8-Pin SOIC N T/R	Conv DC-DC 2.85V to 8.5V Synchronous Step Down Single-Out 0.8V to 8.5V 0.6A 8-Pin SOIC N Tube	Conv DC-DC 2.85V to 8.5V Synchronous Step Down Single-Out 0.8V to 8.5V 0.6A 8-Pin SOIC N	Conv DC-DC 2.85V to 8.5V Synchronous Step Down Single-Out 0.8V to 8.5V 0.6A 8-Pin SOIC N Tube	Conv DC-DC 2.85V to 8.5V Synchronous Step Down Single-Out 0.8V to 8.5V 0.6A 8-Pin SOIC N T/R	Conv DC-DC 2.85V to 8.5V Synchronous Step Down Single-Out 0.8V to 8.5V 0.6A 8-Pin SOIC N
EU restricts the use of certain hazardous substances	Compliant	Compliant	Not Compliant	Compliant	Compliant	Not Compliant
ECCN (US)	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99
Part Status	Active	Active	Unconfirmed	Active	Active	Unconfirmed
Type	Synchronous Step Down	Synchronous Step Down	Synchronous Step Down	Synchronous Step Down	Synchronous Step Down	Synchronous Step Down
Output Type	Adjustable	Adjustable	Adjustable	Adjustable	Adjustable	Adjustable
Switching Frequency (kHz)	385	385	385	385	385	385
Switching Regulator	Yes	Yes	Yes	Yes	Yes	Yes
Number of Outputs	1	1	1	1	1	1
Output Voltage (V)	0.8 to 8.5	0.8 to 8.5	0.8 to 8.5	0.8 to 8.5	0.8 to 8.5	0.8 to 8.5
Maximum Output Current (A)	0.6	0.6	0.6	0.6	0.6	0.6
Minimum Input Voltage (V)	2.85	2.85	2.85	2.85	2.85	2.85
Maximum Input Voltage (V)	8.5	8.5	8.5	8.5	8.5	8.5
Operating Supply Voltage (V)	2.85 to 8.5	2.85 to 8.5	2.85 to 8.5	2.85 to 8.5	2.85 to 8.5	2.85 to 8.5
Typical Quiescent Current (uA)	200	200	200	200	200	200
Line Regulation	0.01%/V	0.01%/V	0.01%/V	0.01%/V	0.01%/V	0.01%/V
Efficiency (%)	96	96	96	96	96	96
Maximum Operating Temperature (°C)	125	125	125	125	125	125
Supplier Temperature Grade	Commercial	Commercial	Commercial	Industrial	Industrial	Industrial
Pin Count	8	8	8	8	8	8
Standard Package Name	SOP	SOP	SOP	SOP	SOP	SOP
Supplier Package	SOIC N	SOIC N	SOIC N	SOIC N	SOIC N	SOIC N
Mounting	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package Height	1.5(Max)	1.5(Max)	1.5(Max)	1.5(Max)	1.5(Max)	1.5(Max)
Package Length	5(Max)	5(Max)	5(Max)	5(Max)	5(Max)	5(Max)
Package Width	3.99(Max)	3.99(Max)	3.99(Max)	3.99(Max)	3.99(Max)	3.99(Max)
PCB changed	8	8	8	8	8	8
Lead Shape	Gull-wing	Gull-wing	Gull-wing	Gull-wing	Gull-wing	Gull-wing
HTS	8542.39.00.01	8542.39.00.01	-	8542.39.00.01	8542.39.00.01	8542.39.00.01
Packaging	Tape and Reel	Tube	-	Tube	Tape and Reel	-

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