lx1668 Microsemi Corporation, lx1668 Datasheet - Page 2

• Manufacturer Part Number: lx1668
• Description: Programmable Multiple Output Dc Dc Controller
• Manufacturer: Microsemi Corporation

LX1668
2
12V Supply Voltage (V
5V Supply Voltage (V
Supply Voltage (Internal LDO)/(V
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
Note 2. V
DW PACKAGE:
PW PACKAGE:
Junction Temperature Calculation: T
The
system. All of the above assume no ambient airflow.
THERMAL RESISTANCE-JUNCTION TO AMBIENT,
THERMAL RESISTANCE-JUNCTION TO AMBIENT,
JA
numbers are guidelines for the thermal performance of the device/pc-board
respect to Ground. Currents are positive into, negative out of the specified
terminal.
3.3V will cause increased thermal dissipation in the package. Power dissipation
should be limited to keep junction temperature below maximum rating.
AB S O LUT E MAXIM UM RAT INGS
CC3
supply is used as input to internal low dropout regulator. Voltages above
CC5
CC12
) ....................................................................................... 7V
) .................................................................................. 18V
T HE RM AL DATA
P
P R O D U C T D A T A B O O K 1 9 9 6 / 1 9 9 7
ROGRAMMABLE
J
CC3
= T
) ................................................................... 7V
A
+ (P
P
D
R O D U C T I O N
x
JA
JA
JA
).
M
U LTIPLE
(Note 1 & 2)
O
UTPUT
D
110°C/W
A T A
85°C/W
DC:DC C
S
H E E T
ONTROLLER
TDRV
V
V
VID0
VID1
VID2
V
V
L
CC12
OUT2
DRV
PACKAGE PIN OUTS
CC5
CC3
L
FB
TDRV
DW PACKAGE — 20-Pin
V
V
VID0
VID1
VID2
PW PACKAGE — 20-Pin
V
V
OUT2
L
CC12
DRV
CC5
CC3
L
FB
1
2
3
4
5
6
7
8
9
10
(Top View)
(Top View)
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
20
19
18
17
16
15
14
13
12
11
PGND
BDRV
AGND
SS/ENABLE
V
V
PWRGD
OVP
VID4
VID3
FB
CORE
Copyright © 1999
PGND
BDRV
AGND
SS/ENABLE
V
V
PWRGD
OVP
VID4
VID3
Rev. 1.0
FB
CORE
4/99