LTM4678
Dual 25A or Single 50A µModule Regulator
with Digital Power System Management
FEATURES
DESCRIPTION
The LTM®4678 is a dual 25A or single 50A step-down
µModule® (power module) DC/DC regulator featuring
remoteconfigurabilityandtelemetry-monitoringofpower
managementparametersoverPMBus—anopenstandard
n
Dual Digitally Adjustable Analog Loops with Digital
Interface for Control and Monitoring
Wide Input Voltage Range: 4.5V to 16V
Output Voltage Range: 0.5V to 3.3V
n
n
n
n
n
n
n
n
n
n
n
n
2
0.5% Maximum DC Output Error Over Temperature
5% Current Readback Accuracy
I C-based digital interface protocol . The LTM4678
is comprised of digitally programmable analog control
loops, precision mixed-signal circuitry, EEPROM, power
MOSFETs, inductors and supporting components.
Sub-Milliohm DCR Current Sensing
Integrated Input Current Sense Amplifier
2
400kHz PMBus-Compliant I C Serial Interface
The LTM4678’s 2-wire serial interface allows outputs to
be margined, tuned and ramped up and down at program-
mable slew rates with sequencing delay times. True input
currentsense,outputcurrentsandvoltages,outputpower,
temperatures,uptimeandpeakvaluesarereadable.Custom
configuration of the EEPROM contents is not required. At
start-up,outputvoltages,switchingfrequency,andchannel
phaseangleassignmentscanbesetbypin-strappingresis-
tors. The LTpowerPlay® GUI and DC1613 USB-to-PMBus
converter and demo kits are available.
Supports Telemetry Polling Rates up to 125Hz
Integrated 16-Bit ∆Σ ADC
Constant Frequency Current Mode Control
Parallel and Current Share Up to 250A
16mm × 16mm × 5.86mm CoP-BGA Package
Readable Data:
n
Input and Output Voltages, Currents, and Temperatures
n
Running Peak Values, Uptime, Faults and Warnings
n
Onboard EEPROM Fault Log Record
Writable Data and Configurable Parameters:
n
The LTM4678 is offered in a 16mm × 16mm × 5.86mm
CoP-BGA package available with SnPb or RoHS compliant
terminal finish.
All registered trademarks and trademarks are the property of their respective owners. Protected
by U.S. Patents including 5408150, 5481178, 5705919, 5929620, 6144194, 6177787, 6580258,
7420359, 8163643. Licensed under U.S. Patent 7000125 and other related patents worldwide.
Output Voltage, Voltage Sequencing and Margining
n
Digital Soft-Start/Stop Ramp, Program Analog Loop
n
OV/UV/OT, UVLO, Frequency and Phasing
APPLICATIONS
n
System Optimization, Characterization and Data Min-
ing in Prototype, Production and Field Environments
TYPICAL APPLICATION
Dual 25A µModule Regulator with Digital
Interface for Control and Monitoring*
Using PMBus and LTpowerPlay to Monitor Telemetry and Margin
VOUT0/VOUT1 During Load Pattern Tests, 10Hz Polling Rate, 12VIN
ꢀ
ꢁꢂꢃ0
Output Voltage Readback, V
Margined 7.5% Low
Input Current Readback
OUT
ꢀꢁꢂꢃ ꢄꢅ ꢆꢇꢃ
ꢂ
ꢄꢅꢆꢂꢇꢃꢄꢈꢉꢊ
ꢂꢋ ꢃꢁ ꢌꢍꢄ
ꢀ
ꢀꢁꢀ
ꢀꢁꢂ
ꢀꢁꢂ
ꢃꢁ0
0ꢁꢄ
0
ꢊꢁꢋ
ꢃꢁꢂ
0ꢁꢌ
0
ꢀꢁRꢂꢃ
ꢄꢅꢆꢇ ꢈꢂ ꢆꢅꢉꢆ ꢊ
ꢋꢂꢌꢌꢍꢋꢈ
ꢁꢂꢃ0
ꢀꢁ
ꢄ
ꢀ
ꢁꢂꢃꢂ0
R
ꢀꢁꢂꢀꢁ
ꢀꢁ0
0ꢁꢂ
0ꢁꢉ
ꢀꢁꢉ
ꢀꢁꢊ
ꢀꢁꢋ
ꢀꢀꢁꢂ
ꢀꢁ
ꢀ00ꢁꢂ
ꢀꢁ
ꢀꢁꢂꢃ0
ꢂ
ꢀꢁ
ꢀ
ꢀ
ꢇ
ꢊ ꢏꢇ
ꢎꢌ
ꢎꢌ
ꢄ
ꢀ
ꢁꢂꢃꢂ0
ꢐꢌꢑ ꢎꢌꢈꢇ
ꢈꢂꢒꢍꢈꢓꢍRꢔ
ꢋꢋ
ꢁꢂꢃ
ꢀ
ꢁꢂꢃꢄ
ꢁꢂ0
ꢀ
ꢁꢂꢃꢄ
ꢅ
ꢅꢆꢇꢂꢈꢃꢅꢉꢊꢋ
ꢂꢌ ꢃꢁ ꢍꢎꢅ
ꢀ00ꢁꢂ
ꢀꢁ
ꢂꢃ
ꢀ
ꢁꢂꢃꢂꢄ
0
ꢌ
ꢋ
ꢂ
ꢀꢕ
ꢒꢋꢊꢉ ꢆꢓ0ꢀꢔ
0
ꢋ
ꢂ
ꢔ
ꢃꢀ
Rꢀꢁꢂ
ꢀꢁꢂꢃꢄꢅꢆ
ꢆꢍꢎꢏ ꢇꢐꢏꢑꢈ
ꢍꢅꢎꢏ ꢇꢐꢏꢑꢉ
ꢊꢂꢒꢌ ꢍꢈ0ꢃꢓ
ꢀꢁꢂꢃꢄ
ꢀꢁꢂꢀꢃꢃ ꢄꢀꢁꢅRꢀꢆ
ꢀꢁ
Rꢀꢁ0
FAULT0
ꢅ
ꢀ
ꢁꢂꢃꢂꢄ
Output Current Readback, Varying Load Pattern
Power Stage Temperature Readback
ꢀꢁ
ꢂ0
ꢁ
ꢀꢁ
ꢂ0
ꢁ
ꢀ0
ꢁꢂ
ꢁꢃ
ꢁꢐ
ꢀ0
ꢁꢂ
ꢁꢃ
ꢁꢐ
ꢀꢁꢂꢃꢄ ꢅꢆꢄꢇRRꢂꢈꢄꢉ
FAULT1
ꢀꢁꢂꢃ
ꢁ
ꢀ ꢂꢃꢄꢅꢆꢇꢈ ꢀꢃꢉ ꢊꢀꢋꢌ ꢍꢅꢆꢇꢈ
ꢂꢎꢅꢅꢏꢐꢑ ꢄꢒꢋ ꢋꢎꢃꢉRꢎꢅ
ꢀꢍꢅꢀ ꢎR ꢎꢋꢌꢒR ꢆꢎꢏRꢑ
ꢀꢁꢂ
ꢀꢁꢂ
ꢀꢁꢂꢃꢄRꢅꢂꢆꢇꢈꢉꢆꢅꢂ ꢉꢆꢊꢋꢌꢍꢈꢀꢋ
RꢋꢎꢆꢀꢉꢋR ꢏRꢆꢉꢋ ꢐRꢅꢉꢋꢃꢉꢆꢅꢂ
ꢀꢁꢂRꢃꢄCLK
ꢀꢁ
ALERT
ꢅꢏꢐꢏꢓꢒꢅꢒꢐꢋ ꢂꢎꢐꢋRꢎꢔꢔꢒR
ꢀꢁꢂꢃ ꢀꢁꢂ
ꢀꢁꢂꢃ ꢄꢅ0ꢆꢇ
0
0
ꢈꢉꢊR ꢋꢊꢌꢍꢎꢏꢄꢏ ꢋꢐRꢋꢑꢐ ꢒ ꢓꢏꢏ ꢉꢐꢔꢑRꢏ ꢀꢁ
0
ꢊ
ꢋ
ꢔ
ꢂꢀ
0
ꢑ
ꢀ
ꢕ
ꢐꢖ
ꢆꢃꢌꢍ ꢇꢎꢍꢏꢉ
ꢐꢋꢑꢒ ꢆꢈ0ꢂꢓ
ꢊꢒꢋꢈ ꢍꢓꢈꢄꢏ
ꢃꢀꢂꢔ ꢊꢆ0ꢐe
Rev 0
1
Document Feedback
For more information www.analog.com
5秒后页面跳转
STM32H743技术深度剖析与应用案例探索
LM321中文资料解析：引脚功能介绍、技术特点、技术特性分析
74HC14芯片资料介绍：性能特性分析、引脚介绍
LM1875芯片手册：功放参数分析、引脚说明、电路设计要点
微信公众号
抖音公众号
浙公网安备 33010502006866号 浙ICP备10014259号-119
营业执照ICP证
数据手册
如果您发现信息不准确，
