Datasheet > LTC3870-1

LTC3870-1

更新时间： 2024-01-04 01:17:24

品牌	Logo	应用领域
凌特 - Linear		/
页数	文件大小	规格书
20页	1057K
描述
PolyPhase Step-Down Slave Controller for Digital Power System Management

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LTC3870-1 数据手册

LTC3870-1

PolyPhase Step-Down

Slave Controller for Digital

Power System Management

DescripTion

FeaTures

TheLTC^®3870-1isaPolyPhase^®step-downslavecontrol-

ler specially designed for multiphase operation with LTC's

digital power system management DC/DC controllers. It

provides a small and cost effective solution for supply-

ing very large currents by cascading it with a LTC3887-1

controller. A peak current mode architecture provides the

LTC3870-1 with excellent current sharing from phase to

phase and from chip to chip.

LTC3887-1 Phase Extender

Operates with Power Blocks, DrMOS or External

Gate Drivers and MOSFETs

Cascade with Multiple Chips for Very Large Current

Applications

Accurate PolyPhase Current Sharing

EXTV Capable of 5V to 14V Input

Wide V Range: 4.5V to 60V

Wide Output Voltage Range : 0.5V to 14V

Wide SYNC Frequency Range: 100kHz to 1MHz

Pin Programmable CCM/DCM Operation

Pin Programmable Phase-Shift Control

Coherently working with the LTC3887-1, the LTC3870-1

doesnotrequireadditionalI Caddresses, anditsupports

all programmable features as well as fault protection.

The constant switching frequency can be synchronized

to an external clock from the LTC3887-1 over a range of

100kHz to 1MHz.

Available in a 24-Pin (4mm × 4mm) QFN Package

L, LT, LTC, LTM, PolyPhase, Linear Technology and the Linear logo are registered trademarks

of Linear Technology Corporation. All other trademarks are the property of their respective

owners. Protected by U.S. Patents including 5481178, 5705919, 5929620, 6144194, 6177787,

6580258, 5408150

applicaTions

High Power Distributed Power Systems

Telecom Systems

Industrial Applications

Typical applicaTion

Load Transient Response of a

2-Phase Master (3887-1)/Slave

(3870-1) Converter

7V TO 14V

22µF

4.7µF

INTV

LOAD

20A/DIV

10A TO 20A TO 10A

CC1

CC0

LTC3870-1

LTC3887–1

(CH0)

10A/DIV

OUT0

3.3V, 30A

OUT1

1.8V, 40A

1.0µH

0.56µH

DrMOS

PWM0

PWM1

DrMOS

LTC3870–1

(CH0)

10A/DIV

2.15k

0.2µF

1.74k

530µF

0.2µF

OUT

SENSE0

SENSE1

200mV/DIV

SENSE0

SENSE1

AC–COUPLED

38701 TA01b

100µs/DIV

EXTV

LTC3887-1

RUN0

= 12V

OUT

RUN0

= 1.8V

RUN1

GPIO0

GPIO1

RUN1

82.5k

3.3V

FAULT0

FAULT1

FREQ

PHASMD

SENSE0

1.8V

LIM

SENSE1

TH0

TH1

MODE0

MODE1

GND

TH1

SYNC

* REFER TO LTC3887-1 DATA SHEET

FOR MASTER SETUP

38701 TA01a

38701f

For more information www.linear.com/LTC3870-1

12 3 4 5 6 7...20

中文翻译

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与LTC3870-1相关器件

型号	品牌	获取价格	描述	数据表
LTC3870EUFD	Linear	获取价格	60V Dual Output Step-Down DC/DC Controller with Digital Power System Management
LTC3870IUF-1#PBF	Linear	获取价格	LTC3870-1 - PolyPhase Step-Down Slave Controller for Digital Power System Management; Pack
LTC3871	Linear	获取价格	150V Low IQ, Synchronous Step-Down DC/DC Controller
LTC3871	ADI	获取价格	双向、多相、同步降压或升压型控制器
LTC3871HLXE#PBF	Linear	获取价格	LTC3871 - Bidirectional PolyPhase® Synchronous Buck or Boost Controller; Package:
LTC3872	Linear	获取价格	No RSENSE Current Mode Boost DC/DC Controller
LTC3872	ADI	获取价格	No RSENSE 电流模式升压型 DC/DC 控制器
LTC3872-1	Linear	获取价格	No RSENSE Current Mode Boost DC/DC Controller
LTC3872-1	ADI	获取价格	No RSENSE 电流模式升压型 DC/DC 控制器
LTC3872-1_15	Linear	获取价格	No RSENSE Current Mode Boost DC/DC Controller

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