LTC3860 LINER [Linear Technology], LTC3860 Datasheet

LTC3860

Manufacturer Part Number

LTC3860

Description

Dual, Multiphase Step-Down Voltage Mode DC/DC Controller with Current Sharing

Manufacturer

LINER [Linear Technology]

Datasheet

1.LTC3860.pdf (36 pages)

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

LTC3860EUF

Manufacturer:

Quantity:

10 000

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

LTC3860EUH

Manufacturer:

Quantity:

10 000

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

LTC3860EUH#3HNPBF

Manufacturer:

Quantity:

10 000

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

LTC3860EUH#PBF/IU

Manufacturer:

Quantity:

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

LTC3860EUHE

Manufacturer:

Quantity:

10 000

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Download datasheet (452Kb)

applicaTions

Typical applicaTion

FeaTures

Constant Frequency Voltage Mode Control with

Accurate Current Sharing

±0.75% 0.6V Voltage Reference

Differential Remote Output Voltage Sense Amplifier

Multiphase Capability—Up to 12-Phase Operation

Programmable Current Limit

Safely Powers a Pre-Biased Load

Programmable or PLL-Synchronizable Switching

Frequency Up to 1.25MHz

Lossless Current Sensing Using Inductor DCR or

Precision Current Sensing with Sense Resistor

Fast and Accurate True Operational Error Amplifiers

Power Good Output Voltage Monitor

Output Voltage Tracking Capability

Programmable Soft-Start

Available in a 32- Pin 5mm × 5mm QFN Package

High Current Distributed Power Systems

Digital Signal Processor and ASIC Supplies

Telecom Systems

Industrial Power Supplies

Range: 3V to 24V

Range: 3V to 5.5V

OUT

20k

220pF

220

1nF

12.7k

33pF

470µF

1µF

0.1µF

VINSNS

FREQ

FB2

FB1

COMP1,2

SS1,2

VSNSOUT

VSNSN

VSNSP

LIM2

SGND

LTC3860

PWM1

CLKIN

ISNS1N

ISNS2N

RUN1,2

ISNS1P

ISNS2P

PWM2

LIM1

AVG

100pF

50k

Voltage Mode DC/DC Controller

PWM2

PWM1

0.22µF

DescripTion

The LTC

down switching regulator controller for high current

distributed power systems, digital signal processors, and

other telecom and industrial DC/DC power supplies. It uses

a constant frequency voltage mode architecture combined

with very low offset, high bandwidth error amplifiers and

a remote output sense differential amplifier for excellent

transient response and output regulation.

The controller incorporates lossless inductor DCR current

sensing to maintain current balance between phases and to

provide overcurrent protection. The chip operates from a

down conversion from V

voltages between 0.6V and V

The TRACK/SS pins provide programmable soft-start or

tracking functions. Inductor current reversal is disabled

during soft-start to safely power prebiased loads. The con-

stant operating frequency can be synchronized to an exter-

nal clock or linearly programmed from 250kHz to 1.25MHz.

Up to six LTC3860 controllers can operate in parallel for

1-, 2-, 3-, 4-, 6- or 12-phase operation.

The LTC3860 is available in a 32-pin 5mm × 5mm QFN

package.

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

trademarks and No R

trademarks are the property of their respective owners. Protected by U.S. Patents, including

6144194, 5055767

Dual, Multiphase Step-Down

0.22µF

BOOST

LOGIC

supply between 3V and 5.5V and is designed for step-

LTC4449

GND

3860 is a dual, PolyPhase

SENSE

is a trademark of Linear Technology Corporation. All other

with Current Sharing

TG1

BG1

TG2

BG2

SW1

SW2

2.32k

between 3V and 24V to output

0.3µH

– 0.5V.

3860 TA01

synchronous step-

330µF

LTC3860

1.2V

50A

OUT

3860f

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