LX8942IDT データシートの表示（PDF） - Microsemi Corporation
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LX8942IDT Datasheet PDF : 8 Pages
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LX8942
TM
®
Low Dropout Dual Regulator
PRODUCTION DATA SHEET
ABSOLUTE MAXIMUM RATINGS
Input Voltage (VIN) Operating .......................................................................................26V
Input Voltage (VIN) Over Voltage Transient.................................................... -15V to 60V
ON/OFF Switch ................................................................................................-0.3V to VIN
Operating Ambient Temperature Range ..................................................... -40°C to +85°C
Storage Temperature Range (TSTG)..............................................................-65°C to 150°C
Maximum Operating Junction Temperature (TJ) ....................................................... 150°C
Note: Exceeding these ratings could cause damage to the device. All voltages are with respect to
Ground. Currents are positive into, negative out of specified terminal.
THERMAL DATA
DT Plastic TO-252 5-Pin
THERMAL RESISTANCE-JUNCTION TO CASE, θJC
THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA
9°C/W
80°C/W
Junction Temperature Calculation: TJ = TA + (PD x θJA).
The θJA numbers are guidelines for the thermal performance of the device/pc-board system. All of the
above assume no ambient airflow.
PACKAGE PIN OUT
GROUND
STANDBY OUTPUT (VSB)
ON/OFF SWITCH
GROUND
OUTPUT VOLTAGE (VOUT1)
INPUT VOLTAGE (VIN)
DT PACKAGE
(Top View)
RoHS / Pb-free 100% matte Tin Lead Finish
Note: The heat sink tab is the Ground
Connection for this package.
Name
VIN
VOUT1
GND
ON/OFF
VSB
FUNCTIONAL PIN DESCRIPTION
Description
Input Voltage Supply.
+8.2V Output Voltage at up to 1000mA.
Regulator Ground.
TTL Logic level input control for turning ON and OFF the high current VOUT1 regulator.
+5V Standby Output Voltage at up to 60mA.
RECOMMENDED OPERATING CONDITIONS
Range over which the device is functional.
Parameter
Input Voltage
ON/OFF Threshold Voltage Low Level, (VOUT1 is OFF)
ON/OFF Threshold Voltage High level, (VOUT1 is ON)
Load Current VOUT1 (with adequate heatsinking)
Maximum Line Transient (Load Dump) VSB < 6V
Input Capacitor (VIN to GND)
Reverse Polarity D.C. Input Voltage (VIN) (VOUT1 > -0.6V, 16Ω Load)
Reverse Polarity Transient Input Voltage (VIN) (1% Duty Cycle, T <
100ms, VOUT1 > -9V, 16Ω Load)
Output Capacitor (VOUT1 to GND & VSB to GND)
Output Capacitor ESR Value
Symbol
VIN
VIL
VIH
LX8942
Min Typ Max
9
26
0.8
2
5
1000
60
0.1
-15
Units
V
V
V
mA
V
µF
V
-50 V
10
µF
0.5
5.0 Ω
Copyright © 2005
Rev. 1.2, 2006-01-20
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 2
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