MAX5083 Maxim Integrated Products, MAX5083 Datasheet
MAX5083
Manufacturer Part Number
MAX5083
Description
1.5A / 40V / MAXPower Step-Down DC-DC Converters
Manufacturer
Maxim Integrated Products
Datasheet
1.MAX5083.pdf
(18 pages)
The MAX5082/MAX5083 are 250kHz PWM step-down
DC-DC converters with an on-chip, 0.3Ω high-side
switch. The input voltage range is 4.5V to 40V for the
MAX5082 and 7.5V to 40V for the MAX5083. The output
is adjustable from 1.23V to 32V and can deliver up to
1.5A of load current.
Both devices utilize a voltage-mode control scheme for
good noise immunity in the high-voltage switching envi-
ronment and offer external compensation allowing for
maximum flexibility with a wide selection of inductor val-
ues and capacitor types. The switching frequency is
internally fixed at 250kHz and can be synchronized to
an external clock signal through the SYNC input. Light
load efficiency is improved by automatically switching
to a pulse-skip mode.
All devices include programmable undervoltage lock-
out and soft-start. Protection features include cycle-by-
cycle current limit, hiccup-mode output short-circuit
protection, and thermal shutdown. Both devices are
available in a space-saving, high-power (2.7W), 16-pin
TQFN package and are rated for operation over the
-40°C to +125°C temperature range.
19-3657; Rev 0; 5/05
FireWire is a registered trademark of Apple Computer, Inc.
Typical Operating Circuits continued at end of data sheet.
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
FireWire
Distributed Power
4.5V TO 40V
PGND
®
V
IN
Power Supplies
________________________________________________________________ Maxim Integrated Products
C1
R1
R2
General Description
C2
Applications
ON/OFF
REG
1.5A, 40V, MAXPower Step-Down
SYNC SGND PGND
IN
Automotive
Industrial
DVREG
MAX5082
C-
C
F
C+
SS
♦ 4.5V to 40V (MAX5082) or 7.5V to 40V (MAX5083)
♦ 1.5A Output Current
♦ V
♦ Internal High-Side Switch
♦ Fixed 250kHz Internal Oscillator
♦ Automatic Switchover to Pulse-Skip Mode at
♦ External Frequency Synchronization
♦ Thermal Shutdown and Short-Circuit Protection
♦ Operates Over the -40°C to +125°C Temperature
♦ Space-Saving (5mm x 5mm) High-Power 16-Pin
*EP = Exposed pad.
Pin Configurations appear at end of data sheet.
MAX5082ATE
MAX5083ATE
C
Input Voltage Range
Light Loads
Range
TQFN Package
D1
SS
OUT
BST
COMP
PART
Range From 1.23V to 32V
LX
FB
DC-DC Converters
Typical Operating Circuits
D2
C
BST
-40°C to +125°C
-40°C to +125°C
L1
TEMP RANGE
Ordering Information
C8
R5
C5
C7
www.DataSheet4U.com
R6
C6
PIN-PACKAGE
16 TQFN-EP*
16 TQFN-EP*
Features
R3
R4
V
PGND
OUT
1
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