LTC3713EG#TR

更新时间： 2024-01-22 22:25:54

品牌	Logo	应用领域
凌特 - Linear		控制器
页数	文件大小	规格书
24页	317K
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LTC3713EG#TR 数据手册

LTC3713

Low Input Voltage,

High Power, No R_SENSE

Synchronous Buck DC/DC Controller

FEATURES

DESCRIPTIO

The LTC^®3713 is a high current, high efficiency synchro-

nous buck switching regulator controller optimized for

■

Very Low V_IN(MIN): 1.5V

■

True Current Mode Control

■

5V Drive for N-Channel MOSFETs Eliminates

Auxillary 5V Supply

No Sense Resistor Required

Uses Standard 5V Logic-Level N-Channel MOSFETs

Adjustable Current Limit

Adjustable Frequency

Switch t_ON(MIN)< 100ns

2% to 90% Duty Cycle at 200kHz

0.8V ±1% Reference

Power Good Output Voltage Monitor

Programmable Soft-Start

Output Overvoltage Protection

Optional Short-Circuit Shutdown Timer

Small 24-Lead SSOP Package

use with very low input supply voltages. It operates from

inputs as low as 1.5V and provides a regulated output

voltage from 0.8V up to (0.9)V_IN. The controller uses

a valley current control architecture to enable high operat-

ing frequencies without requiring a sense resistor.

Operatingfrequencyisselectedbyanexternalresistorand

iscompensatedforvariationsinV_INandV_OUT.TheLTC3713

uses a pair of standard 5V logic-level N-channel external

MOSFETs, eliminating the need for expensive P-channel

or low threshold devices.

■

Discontinuous mode operation provides high efficiency

operation at light loads. A forced continuous control

pin reduces noise and RF interference, and can assist

secondary winding regulation by disabling discontinuous

operation when the main output is lightly loaded. Fault

protection is provided by internal foldback current limit-

ing, an output overvoltage comparator and an optional

short-circuit shutdown timer.

APPLICATIO S

■

Telecom Card 3.3V, 2.5V, 1.8V Step-Down

■

Bus Termination (DDR memory, SSTL)

■

Synchronous Buck with General Purpose Boost

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

No R_SENSEis a trademark of Linear Technology Corporation.

■

Low V_INSynchronous Boost

TYPICAL APPLICATIO

1.8V TO 3.3V

CMDSH-3

22µF

×2

Efficiency vs Load Current

SHDN

BOOST

330k

0.33µF

100

5.6k

10k

= 2.5V

LTC3713

1.8µH

OUT

1.25V

10A

FB1

SW1

OUT

SENSE

270µF

×2

680pF

B340A

20k

PGND

–

SENSE

10µF

RUN/SS INTV

IN1

IN2

0.1µF

PGOOD

SGND

3713 F01a

4.7µF

: PANASONIC EEFUEOD271R

MBR0520

OUT

4.7µH

0.01

0.04 0.10 0.40

L1: (A) PANASONIC ETQP6FIR8BFA

(B) TOKO D104C-1.8µH

LOAD CURRENT (A)

FB2

SW2

M1, M2: (A) IRF7822, (B) IRF7811A

3713 F01b

12.1k

37.4k

Figure 1. High Efficiency Step-Down Converter from 1.8V to 3.3V Input

3713fa

12 3 4 5 6 7...24

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LTC3713EG#TRPBF	Linear	LTC3713 - Low Input Voltage, High Power, No Rsense Synchronous Buck DC/DC Controller; Pack	获取价格
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LTC3714	ADI	具内部运放的 Intel 兼容、宽工作范围、降压型控制器	获取价格
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LTC3714EG#TR	Linear	LTC3714 - Intel Compatible, Wide Operating Range, Step-Down Controller with Internal Op Am	获取价格

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