Analog Devices Linear Technology LTM4676 Migration Manual
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Brand: Analog Devices
Category: Controller
Type: Migration manual
Model: Analog Devices Linear Technology LTM4676 , Analog Devices Linear Technology LTM4676A
Pages: 3
Download Analog Devices Linear Technology LTM4676 Migration manual
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Migration Guide
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Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-
tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
LTM4676 to LTM4676A
L, LT, LTC, LTM, Linear Technology, Burst Mode, PolyPhase and the Linear logo are registered trademarks and LTpowerPlay is a trademark of Analog Devices, Inc. All other trademarks are the
property of their respective owners.
IntroductIon
Feature comparIson
pIn conFIguratIon
The LT M
®
4676A is a pin-compatible upgrade to the
LTM4676. Key benefits of the LTM4676A over the
LTM4676 include:
n
Faster Power-Up
n
Reduced PWM Minimum On-Time
n
Faster ADC Telemetry Update
n
Support of I
2
C PMBus Thresholds Compatible with
Bus Power Supplies as low as 1.8V
n
Improved Internal EEPROM Robustness
n
Wider Output Voltage Range
n
More Accurate Output Setpoint Voltage
LTM4676 LTM4676A
MFR_ADC_CONTROL for Fast ADC Sampling of a Parameter
✓
PMBus Version 1.1 1.2
Alert Masking (a Part of 1.2 PMBus Compliant)
✓
Shared Differential Sense Amp
✓
Improved SYNC Circuit if Input Clock is Lost
✓
Improved Fault Log Recording, EEPROM Robustness
✓
Uppermost Three Bits of the Module’s PMBus Address are User-Configurable
✓
Supports PWM Burst Mode
®
Operation
✓
All pins of the LTM4676A are fully compatible with the
LTM4676. In most cases, the LTM4676A will work as a
drop in replacement for the LTM4676.
n
PolyPhase
®
applications can use the differential sense
amplifier of channel 0 for improved current sharing
n
PolyPhase applications can clock at the desired fre-
quency even if the SYNC pin is not clocking.
This guide describes the differences and explains the con-
figuration file changes needed when migrating a design
from the LTM4676 to the LTM4676A.