LTC3884 datasheet(16/26 Pages) AD

16 / 26 page

LTC7883

Rev. 0

For more information www.analog.com

OPERATION

Overview

The LTC7883 is a quad channel constant frequency

analog voltage mode controller for DC/DC step-down

applications. It features PMBus compliant digital inter-

faces for monitoring and control of important power sys-

tem parameters. The IC operates from power supplies

between 3V and 13.2V and is intended for conversion

from VIN between 3V and 38V to output voltages between

0.1V and 5.25V. It is designed to be used in a switching

architecture with external FET drivers, including higher

level integrations such as non-isolated power blocks.

Major features include:

• Digitally Programmable Output Voltage, Current Limit

and Related Supervisors

• Digitally Programmable Input Voltage Supervisor

• Digitally Programmable Switching Frequency with PLL

for Synchronous PolyPhase Operation Up to 8 Phases

• Digitally Programmable On and Off Delay Times

• Digitally Programmable Soft-Start/Stop

• Operating Condition Telemetry

• Fully Differential Load Sense

• Nonvolatile Configuration Memory with ECC Capable

of Standalone Operation

• Optional External Resistor Configuration of Key

Operating Parameters

• Optional Time-Base Interconnect for Synchronization

Between Multiple Controllers

• Warning and Fault Status with Fault Event Data Logging

• PMBus Revision 1.2 Compliant Interface Up to 400kHz

Internal Structure

The LTC7883 is comprised of two dual-channel units,

each equivalent to an LTC3882-1 with the added feature

of a hardware PMBus write protect for each unit.

Refer to the LTC3882-1 data sheet for a detailed descrip-

tion of operation, PMBus command set, and applications

information for each unit.

Refer to the LTC3888 data sheet for additional details on

operation of the WP pins and their interaction with the

PMBus WRITE_PROTECT command on each unit.

Unique Special ID

Each internal unit of the LTC7883 reports a unique MFR_

SPECIAL_ID to differentiate it from an LTC3882-1. Table 1

lists MFR_SPECIAL_ID values for these products. X is

adjustable by the manufacturer.

Table 1. MFR_SPECIAL_ID Values

DEVICE

MFR_SPECIAL_ID

MFR_MODEL

LTC3882-1

0x424X

LTC3882-1

LTC7883 Unit A

0x450X

LTC7883A

LTC7883 Unit B

0x451X

LTC7883B

LTC3884 Datasheet(PDF) 16 Page - Analog Devices

LTC3884 Datasheet(HTML) 16 Page - Analog Devices

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26

Datasheet Download

Link URL