lx1665 Microsemi Corporation, lx1665 Datasheet - Page 2

• Manufacturer Part Number: lx1665
• Description: Dual Output Pwm Controllers With 5-bit Dac
• Manufacturer: Microsemi Corporation

LX1664/64A, LX1665/65A
2
available in a narrow body 16-pin surface
mount IC package for space sensitive appli-
cations. The LX1665 provides the additional
functions of Over Voltage Protection (OVP)
and Power Good (PWRGD) output drives
for applications requiring output voltage
monitoring and protection functions.
duces system cost. The modulated off-
time architecture results in the fastest tran-
Supply Voltage (V
Supply Voltage (V
Output Drive Peak Current Source (500ns) ............................................................... 1.5A
Output Drive Peak Current Sink (500ns) ................................................................... 1.5A
Input Voltage (SS, INV, V
Operating Junction Temperature
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
N (16-PIN DIP) PACKAGE:
N (18-PIN DIP) PACKAGE:
D PACKAGE:
DW PACKAGE:
Junction Temperature Calculation: T
The θ
All of the above assume no ambient airflow
THERMAL RESISTANCE-JUNCTION TO AMBIENT, θ θ θ θ θ
THERMAL RESISTANCE-JUNCTION TO AMBIENT, θ θ θ θ θ
THERMAL RESISTANCE-JUNCTION TO AMBIENT, θ θ θ θ θ
THERMAL RESISTANCE-JUNCTION TO AMBIENT, θ θ θ θ θ
Smallest Package Size. The LX1664 is
Ultra-Fast Transient Response re-
Plastic (N, D & DW Packages) ............................................................................. 150°C
JA
numbers are guidelines for the thermal performance of the device/pc-board system.
to Ground. Currents are positive into, negative out of the specified terminal. Pin
numbers refer to DIL packages only.
A B S O L U T E M A X I M U M R AT I N G S
C1
CC
) .................................................................................................... 25V
) .................................................................................................... 15V
D E V I C E S E L E C T I O N G U I D E
CC_CORE
D E S C R I P T I O N
T H E R M A L D ATA
P R O D U C T D A T A B O O K 1 9 9 6 / 1 9 9 7
, C
D
J
T
UAL
= T
, VID0-VID4) ........................................... -0.3V to 6V
A
+ (P
O
P
UTPUT
R O D U C T I O N
D
x θ
sient response for a given inductor, reduc-
ing output capacitor requirements, and re-
ducing the total regulator system cost.
Good Flag. The OVP output in the LX1665
& LX1665A can be used to drive an SCR
crowbar circuit to protect the load in the
event of a short-circuit of the main MOSFET.
The LX1665 & LX1665A also have a logic-
level Power Good Flag to signal when the
output voltage is out of specified limits.
JA
JA
JA
JA
JA
Over-Voltage Protection and Power
).
PWM C
(con't.)
ONTROLLERS WITH
(Note 1)
D
A T A
120°C/W
65°C/W
60°C/W
90°C/W
S
H E E T
5-B
IT
DAC
PACKAGE PIN OUTS
LX1664/1664A (Top View)
LX1665/1665A (Top View)
LX1664/1664A (Top View)
LX1665/1665A (Top View)
DW PACKAGE — 18-Pin
D PACKAGE — 16-Pin
N PACKAGE — 16-Pin
N PACKAGE — 18-Pin