LTM4686BEVPBF datasheet(22/130 Pages) AD

22 / 130 page

LTM4686B

Rev. 0

For more information www.analog.com

OPERATION

Three Integrated Temperature Sensors, Over/

Undertemperature Protection.

Constant Frequency Peak Current Mode Control.

Configurable Switching Frequency, 500kHz to 1MHz;

Synchronizable to External Clock; Seven Configurable

Channel Phase Interleaving Settings.

Internal Loop Compensation Provided; External Loop

Compensation Can Be Applied, if Preferred.

Low Profile (16mm × 11.9mm × 1.82mm) LGA Package

Power Solution Requires Only Input and Output

Capacitors; at Most, Nine Pull-Up Resistors for Open-

Drain Digital Signals; at Most, Six Pull-Down Resistors

to Configure All Possible Pin-Strapping Options.

Features of the LTM4686B that enable power system

management, rail sequencing, and fault monitoring and

reporting are as follows:

I2C-based PMBus/SMBus 2-Wire Serial Communication

Interface (SDA, SCL) with ALERT Interrupt Pin, SCL

Clock Capable of 400kHz Bus Communication Speeds

with Clock Low Extending—or 100kHz, Otherwise.

Configurable Output Voltage.

Configurable Input Undervoltage Comparators (UVLO

Rising, UVLO Falling).

Configurable Switching Frequency.

Configurable Current Limit.

Configurable Output Over/Undervoltage Comparators.

Configurable Turn-On and Turn-Off Delay Times.

Configurable Output Ramp Rise and Fall Times.

Nonvolatile Configuration Memory (NVM EEPROM)

with ECC to Configure Aforementioned Settings, and

More—Yielding Standalone Operation, if Desired, and

Also Enabling In-Situ Changes to the LTM4686B’s

Configuration in Embedded Designs.

Monitoring and Reporting of Telemetry Data: Average

Output and Input Currents and Voltages, Internal

Temperatures, and Power Stage Duty Cycles—

Continuously Digitized Cyclically by a 16-Bit ADC.

• Peak Observed Output Current and Voltage, Input

Voltage, and Module Temperatures Can Be Polled

and Cleared/Reset.

• ADC Latency Not Greater Than 90ms, Nominal.

• Option to Monitor One External Temperature in Lieu of

Channel 1 (VOUT1) Module Power Stage Temperature.

Monitoring, Reporting, and Configurable Response

to Latching and Non-Latching Individual Fault and/or

Warning Status, Including but Not Limited to:

• Output Over/Undervoltages.

• Input (SVIN) Over/Undervoltages.

• Module Input and Power Stage Output Overcurrents.

• Module Power Stage Over/Under Temperatures.

• Internal Control IC Overtemperature.

• Communication, Memory and Logic (CML) Faults.

Fault Logging Upon Detection of a Fault Condition. The

LTM4686B Can Be Configured to Automatically Upload a

Fault Log to Its NVM, Consisting of: an Uptime Counter,

Peak Observed Telemetry, Telemetry Gathered from the Six

Most Recent Rounds of Cyclical ADC Data Leading Up to

the Detection of the Fault That Triggered Fault Log Writing,

and Fault Status Associated with That ADC History.

Two Configurable Open-Drain General Purpose Input/

Output Pins (GPIO0, GPIO1), Which Can Be Used for:

• Fault Reporting, e.g., as a System Interrupt Signal.

• Coordinating Turn-On/Off of the LTM4686B in

Multiphase/Multirail Systems.

• Propagating an Unfiltered Power Good Signal

(Output of a VOUTn Undervoltage Comparator) to

Command Turn-On/Off of a Downstream Rail.

A Write Protect (WP) Pin and Configurable

WRITE_PROTECT Register to Protect the Internal

Configuration of RAM and NVM Against Unintended

Changes via I2C.

Time-Base Interconnect (SHARE_CLK, 100kHz

Heartbeat) for Synchronization in the Time Domain

Between Multiple LTM4686Bs.

Optional External Configuration Resistors (RCONFIGs) for

Setting Start-Up Output Voltages, Switching Frequency

and Channel-to-Channel Phase Interleaving Angle.

Any 7-Bit Slave Address Can Be Assigned to the

LTM4686B (0x4F Default), Configured by Resistor Pin

Strapping the ASEL Pin and User-Editable Bits [6:4] of

MFR_ADDRESS.

LTM4686BEVPBF 数据表(PDF) 22 Page - Analog Devices

LTM4686BEVPBF 数据表(HTML) 22 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 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

数据表下载