LX1676(2005) 데이터 시트보기 (PDF) - Microsemi Corporation
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LX1676 Datasheet PDF : 16 Pages
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LX1676
TM
®
Mobile AMD Athlon™ VRM Controller
PRODUCTION DATA SHEET
Name
FB+
FB-
DFOUT
EA1-
EO1
GND
ROSC
ENA
DACOUT
VID4
VID3
VID2
VID1
VID0
PWGD
VCC
VC3
PGN3
I-MIN
VS3
I-MAX
ILIM3
LP1
EA2-
EO2
LP2
VIN
LO2
VS2
HO2
VC2
PGN
LO1
ILIM1
VS1
HO1
VC1
VCCL
FUNCTIONAL PIN DESCRIPTION
Description
Differential Amplifier Positive Input – Feedback from output
Differential Amplifier Negative Input – Feedback from output
Differential Amplifier Output
Phase 1 Error Amplifier Negative Input
Phase 1 Error Amplifier Output
Analog Ground
A resister to ground sets PWM frequency
Enable Input – Logic Low disables all converter phases
DAC Output voltage – 50uA bi-directional current source
Digital Input for VID code – Has an internal pull-up resister
Digital Input for VID code – Has an internal pull-up resister
Digital Input for VID code – Has an internal pull-up resister
Digital Input for VID code – Has an internal pull-up resister
Digital Input for VID code – Has an internal pull-up resister
Power Good Output Pin – Open drain output pin for power good indication. High = Power Good
IC Supply Voltage. Nominal +5V
Supply for transient correction phase upper MOSFET driver, bootstrap voltage
Power ground pin for Transient Correction Loop driver
Output Driver for lower Transient Correction Loop MOSFET
Low side of upper driver for Transient Correction Loop – MOSFET Driver power return
Output Driver for upper Transient Correction Loop MOSFET
Transient Correction Loop current sense – A resister sets an upper limit for over current detection and shut down.
Phase 2 differential amplifier positive input, filtered feedback from phase 1 output
Negative Input of phase 2 integrating amplifier
Output of phase 2 integrating amplifier
Phase 2 differential amplifier negative input, filtered feedback from phase 2 output
Battery Voltage Input.
Driver Output for phase 2 lower MOSFET
Low side of upper gate driver for phase 2.
Driver Output for phase 2 upper MOSFET
Supply for phase 2 upper MOSFET driver, bootstrap voltage
Power ground pin for current sensing of lower MOSFET RDS(ON) for phase 1.
Driver Output for phase 1 lower MOSFET
Over-Current Limit Set – A resister sets an upper limit for over current detection and shut down.
Low side of upper gate driver for phase #1.
Driver Output for phase 1 upper MOSFET
Supply for phase 1 upper MOSFET driver, bootstrap voltage
Voltage bus for the lower MOSFET drivers. Nominal +5V
Copyright © 2000
Revision: 1.0, 4/12/2005
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
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