參數(shù)資料
型號: LX1664ACDT
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, 200 kHz SWITCHING FREQ-MAX, PDSO16
封裝: PLASTIC, SOIC-16
文件頁數(shù): 15/17頁
文件大?。?/td> 354K
代理商: LX1664ACDT
DUAL OUTPUT PWM CONTROLLERS WITH 5-BIT DAC
LX1664/1664A, LX1665/65A
PRODUCT DA T ABOOK 1996/1997
7
Copyright 1999
Rev. 1.2 11/99
P RODUCTION D ATA S HEET
SS
1
INV
2
V
CC_CORE
33
VID0
4
VID1
5
VID2
6
VID3
7
VID4
8
L
FB
99
PWRGD
N.C.
10
L
DRV
10
11
OV
N.C.
12
C
T
11
13
V
CC
12
14
BDRV
13
15
GND
14
16
TDRV
15
17
V
C1
16
18
Soft-Start pin, internally connected to the non-inverting input of the error comparator.
Inverting input of the error comparator.
Output voltage. Connected to non-inverting input of the current-sense comparator.
Voltage Identification pin (LSB) input used to set output voltage.
Voltage Identification pin (2nd SB) input.
Voltage Identification pin (3rd SB) input.
Voltage Identification pin (4th SB) input.
Voltage Identification pin (MSB) input. This pin is also the range select pin — when low
(CLOSED), output voltage is set to between 1.30 and 2.05V in 0.05V increments. When high
(OPEN), output is adjusted from 2.0 to 3.5V in 0.1V increments.
Linear regulator feedback pin. 1.5V reference is connected to a resistor divider to set desired
output voltage.
Open collector output pulls low when the output voltage is out of limits.
Linear regulator drive pin. Connect to gate of MOSFET for linear regulator function.
SCR driver goes high when the processor's supply is over specified voltage limits.
The off-time is programmed by connecting a timing capacitor to this pin.
This is the (12V) supply to the IC, as well as gate drive to the bottom FET.
This is the gate drive to the bottom FET. Leave open in non-synchronous operation (when bottom
FET is replaced by a Schottky diode).
Both power and signal ground of the device.
Gate drive for top MOSFET.
This pin is a separate power supply input for the top drive. Can be connected to a charge pump
when only 12V is available.
Pin
LX1664
LX1665
Name
Pin #
Description
FUNCTIONAL PIN DESCRIPTION
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