LX1668 Ver la hoja de datos (PDF) - Microsemi Corporation
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LX1668 Datasheet PDF : 15 Pages
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PRODUCT DATABOOK 1996/1997
LX1668
P ROGRAMMABLE MULTIPLE OUTPUT DC:DC CONTROLLER
PRODUCTION DATA SHEET
A B S O L U T E M A X I M U M R AT I N G S (Note 1 & 2)
12V Supply Voltage (VCC12) .................................................................................. 18V
5V Supply Voltage (VCC5) ....................................................................................... 7V
Supply Voltage (Internal LDO)/(V ) ................................................................... 7V
CC3
Output Drive Peak Current Source (500ns) ....................................................... 1.0A
Output Drive Peak Current Sink (500ns) ........................................................... 1.0A
Input Voltage (SS, VID[0:4]) ................................................................... -0.3V to 6V
Operating Junction Temperature .................................................................... 150°C
Storage Temperature Range ........................................................... -65°C to +150°C
Lead Temperature (Soldering, 10 Seconds) .................................................... 300°C
Note 1. Exceeding these ratings could cause damage to the device. All voltages are with
respect to Ground. Currents are positive into, negative out of the specified
terminal.
Note 2. VCC3 supply is used as input to internal low dropout regulator. Voltages above
3.3V will cause increased thermal dissipation in the package. Power dissipation
should be limited to keep junction temperature below maximum rating.
T H E R MAL DATA
DW PACKAGE:
THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA
PW PACKAGE:
85°C/W
THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA
110°C/W
Junction Temperature Calculation: TJ = TA + (PD x θJA).
The θ numbers are guidelines for the thermal performance of the device/pc-board
JA
system. All of the above assume no ambient airflow.
PACKAGE PIN OUTS
TDRV
1
20
PGND
VCC12
2
VCC5
3
VOUT2
4
VCC3
5
LDRV
6
LFB
7
VID0
8
19
BDRV
18
AGND
17
SS/ENABLE
16
VFB
15
VCORE
14
PWRGD
13
OVP
VID1
9
12
VID4
VID2
10
11
VID3
DW PACKAGE — 20-Pin
(Top View)
TDRV
1
VCC12
2
VCC5
3
VOUT2
4
VCC3
5
LDRV
6
LFB
7
VID0
8
VID1
9
VID2
10
20
PGND
19
BDRV
18
AGND
17
SS/ENABLE
16
VFB
15
VCORE
14
PWRGD
13
OVP
12
VID4
11
VID3
PW PACKAGE — 20-Pin
(Top View)
2
Copyright © 1999
Rev. 1.0 4/99
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