DCDC芯片MAX5035数据手册
需积分: 17 90 浏览量
2011-06-17
09:15:45
上传
评论
收藏 347KB PDF 举报
General Description
The MAX5035 easy-to-use, high-efficiency, high-volt-
age, step-down DC-DC converter operates from an
input voltage up to 76V and consumes only 270µA qui-
escent current at no load. This pulse-width modulated
(PWM) converter operates at a fixed 125kHz switching
frequency at heavy loads, and automatically switches
to pulse-skipping mode to provide low quiescent cur-
rent and high efficiency at light loads. The MAX5035
includes internal frequency compensation simplifying
circuit implementation. The device uses an internal low-
on-resistance, high-voltage, DMOS transistor to obtain
high efficiency and reduce overall system cost. This
device includes undervoltage lockout, cycle-by-cycle
current limit, hiccup mode output short-circuit protec-
tion, and thermal shutdown.
The MAX5035 delivers up to 1A output current. The out-
put current may be limited by the maximum power dis-
sipation capability of the package. External shutdown is
included, featuring 10µA (typ) shutdown current. The
MAX5035A/B/C versions have fixed output voltages of
3.3V, 5V, and 12V, respectively, while the MAX5035D
features an adjustable output voltage from 1.25V to
13.2V.
The MAX5035 is available in space-saving 8-pin SO
and 8-pin plastic DIP packages and operates over the
automotive (-40°C to +125°C) temperature range.
Applications
Automotive
Consumer Electronics
Industrial
Distributed Power
Features
♦ Wide 7.5V to 76V Input Voltage Range
♦ Fixed (3.3V, 5V, 12V) and Adjustable
(1.25V to 13.2V) Versions
♦ 1A Output Current
♦ Efficiency Up to 94%
♦ Internal 0.4Ω High-Side DMOS FET
♦ 270µA Quiescent Current at No Load, 10µA
Shutdown Current
♦ Internal Frequency Compensation
♦ Fixed 125kHz Switching Frequency
♦ Thermal Shutdown and Short-Circuit Current
Limit
♦ 8-Pin SO and PDIP Packages
MAX5035
1A, 76V, High-Efficiency MAXPower
Step-Down DC-DC Converter
________________________________________________________________ Maxim Integrated Products 1
Ordering Information
19-2988; Rev 2; 5/04
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.
PART
TEMP RANGE
PIN-
PACKAGE
OUTPUT
VOLTAGE
(V)
MAX5035AUSA
0°C to +85°C 8 SO
MAX5035AUPA
0°C to +85°C 8 PDIP
MAX5035AASA
-40°C to +125°C
8 SO
3.3
MAX5035BUSA
0°C to +85°C 8 SO
MAX5035BUPA
0°C to +85°C 8 PDIP
MAX5035BASA
-40°C to +125°C
8 SO
5.0
MAX5035CUSA
0°C to +85°C 8 SO
MAX5035CUPA
0°C to +85°C 8 PDIP
MAX5035CASA
-40°C to +125°C
8 SO
12
MAX5035DUSA
0°C to +85°C 8 SO
MAX5035DUPA
0°C to +85°C 8 PDIP
MAX5035DASA
-40°C to +125°C
8 SO
ADJ
1
2
3
4
BST
VD
SGND
FB
8
7
6
5
LX
TOP VIEW
V
IN
GND
ON/OFF
MAX5035
SO/PDIP
Pin Configuration
MAX5035
GND
BST
LX
V
IN
SGND
FB
D1
50SQ100
VD
100µH
V
OUT
5V
V
IN
7.5V TO 76V
68µF
0.1µF
0.1µF
68µF
ON
OFF
R1
R2
ON/OFF
Typical Operating Circuit
剩余17页未读，继续阅读
评论0
最新资源