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參數(shù)資料
| 型號(hào)： | LX1677-CPWT |
| 廠商： | MICROSEMI CORP-ANALOG MIXED SIGNAL GROUP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 1.5 A SWITCHING CONTROLLER, 1100 kHz SWITCHING FREQ-MAX, PDSO38 |
| 封裝： | PLASTIC, TSSOP-38 |
| 文件頁數(shù)： | 10/16頁 |
| 文件大?。?/td> | 353K |
| 代理商： | LX1677-CPWT |
LX1677
PRELIMINARY DATA SHEET
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 3
WWW
.Microse
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i
.CO
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AMD64 Processor VRM Controller
I N T E GR A T ED
PRODUCT S
Copyright
2000
Rev 0.4a, 2003-03-03
FUNCTIONAL PIN DESCRIPTION
Name
Description
FB+
Differential Amplifier Positive Input – Feedback from output
FB-
Differential Amplifier Negative Input – Feedback from output
DFOUT
Differential Amplifier Output
EA1-
Phase 1 Error Amplifier Negative Input
EO1
Phase 1 Error Amplifier Output
GND
Analog Ground
ROSC
A resister to ground sets PWM frequency
ENA
Enable Input – Logic Low disables all converter phases
DACOUT
DAC Output voltage – 50uA bi-directional current source
VID4
Digital Input for VID code – Has an internal pull-up resister
VID3
Digital Input for VID code – Has an internal pull-up resister
VID2
Digital Input for VID code – Has an internal pull-up resister
VID1
Digital Input for VID code – Has an internal pull-up resister
VID0
Digital Input for VID code – Has an internal pull-up resister
PWGD
Power Good Output Pin – Open drain output pin for power good indication. High = Power Good
VCC
IC Supply Voltage. Nominal +5V
VC3
Supply for transient correction phase upper MOSFET driver, bootstrap voltage
PGN3
Power ground pin for Transient Correction Loop driver
I-MIN
Output Driver for lower Transient Correction Loop MOSFET
VS3
Low side of upper driver for Transient Correction Loop – MOSFET Driver power return
I-MAX
Output Driver for upper Transient Correction Loop MOSFET
ILIM3
Transient Correction Loop current sense – A resister sets an upper limit for over current detection and shut down.
LP1
Phase 2 differential amplifier positive input, filtered feedback from phase 1 output
EA2-
Negative Input of phase 2 integrating amplifier
EO2
Output of phase 2 integrating amplifier
LP2
Phase 2 differential amplifier negative input, filtered feedback from phase 2 output
VIN
Battery Voltage Input.
LO2
Driver Output for phase 2 lower MOSFET
VS2
Low side of upper gate driver for phase 2.
HO2
Driver Output for phase 2 upper MOSFET
VC2
Supply for phase 2 upper MOSFET driver, bootstrap voltage
PGN
Power ground pin for current sensing of lower MOSFET RDS(ON) for phase 1.
LO1
Driver Output for phase 1 lower MOSFET
ILIM1
Over-Current Limit Set – A resister sets an upper limit for over current detection and shut down.
VS1
Low side of upper gate driver for phase #1.
HO1
Driver Output for phase 1 upper MOSFET
VC1
Supply for phase 1 upper MOSFET driver, bootstrap voltage
VCCL
Voltage bus for the lower MOSFET drivers. Nominal +5V
PP
AA
CC
KK
AA
GG
EE
DD
AA
TT
AA
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