MAXIM INTEGRATED PRODUCTS MAX5033 MAXPower Step-Down DC-DC Converter Data Sheet
Summary
The MAX5033 is a high-efficiency, step-down DC-DC converter designed for robust power management in demanding applications. Featuring a wide 7.5V to 76V input voltage range and up to 500mA output current, this device offers reliable performance with advanced protection circuits (e.g., thermal shutdown, short-circuit protection) and an ultra-low quiescent current. This summary provides comprehensive technical details on the module's features, operating modes, package variations, recommended circuit configurations, and electrical specifications for engineers designing consumer electronics, industrial equipment, or distributed power systems.
Page 1 Text Content
19-2979; Rev 3; 1/07
500m A, 76V, High-Efficiency, MAXPower
Step-Down DC-DC Converter
General Description Features
The MAX5033 easy-to-use, high-efficiency, high-voltage, Wide 7.5V to 76V Input Voltage Range
step-down DC-DC converter operates from an input volt- Fixed (3.3V, 5V, 12V) and Adjustable (1.25V to age up to 76V and consumes only 270µA quiescent cur-
13.2V) Voltage Versions
rent at no load. This pulse-width modulated (PWM)
500m A Output Current
converter operates at a fixed 125k Hz switching frequen-
cy at heavy loads, and automatically switches to pulse- Efficiency Up to 94%
skipping mode to provide low quiescent current and Internal 0.4Ω High-Side DMOS FET high efficiency at light loads. The MAX5033 includes
270µA Quiescent Current at No Load, 10µA
internal frequency compensation simplifying circuit Shutdown Current implementation. The device uses an internal low-on-
Internal Frequency Compensation
resistance, high-voltage, DMOS transistor to obtain high
Fixed 125k Hz Switching Frequency
efficiency and reduce overall system cost. This device
includes undervoltage lockout, cycle-by-cycle current Thermal Shutdown and Short-Circuit Current Limit
limit, hiccup-mode output short-circuit protection, and 8-Pin SO and PDIP Packages thermal shutdown.
Ordering Information
The MAX5033 delivers up to 500m A output current. The output current may be limited by the maximum
OUTPUT
power dissipation capability of the package. External
PART TEMP RANGE VOLTAGE
PACKAGE
shutdown is included, featuring 10µA (typ) shutdown
current. The MAX5033A/B/C versions have fixed output
MAX5033AUSA 0°C to +85°C 8 SO
voltages of 3.3V, 5V, and 12V, respectively, while the
MAX5033D features an adjustable output voltage, from MAX5033AUPA 0°C to +85°C 8 PDIP 3.3
1.25V to 13.2V.
MAX5033AASA -40°C to +125°C 8 SO
The MAX5033 is available in space-saving 8-pin SO MAX5033BUSA 0°C to +85°C 8 SO and 8-pin plastic DIP packages and operates over the
MAX5033BUPA 0°C to +85°C 8 PDIP 5.0
automotive (-40°C to +125°C) temperature range.
MAX5033BASA -40°C to +125°C 8 SO MAX5033CUSA 0°C to +85°C 8 SO
Applications MAX5033CUPA 0°C to +85°C 8 PDIP
MAX5033CASA -40°C to +125°C 8 SO
Automotive
MAX5033DUSA 0°C to +85°C 8 SO
Consumer Electronics
MAX5033DUPA 0°C to +85°C 8 PDIP ADJ
Industrial
MAX5033DASA -40°C to +125°C 8 SO
Distributed Power
Typical Operating Circuit Pin Configuration
VIN 7.5V TO 76V
47µF VIN
BST LX
MAX5033 VOUT
VD VIN
R1 LX 5V, 0.5A MAX5033
50SQ100 SGND GND
ON/OFF
FB ON/OFF
ON FB R2 VD
SO/PDIP
OFF SGND GND
Maxim Integrated Products
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.
Page Summary Contents For MAXIM INTEGRATED PRODUCTS MAX5033 MAXPower Step-Down DC-DC Converter Data Sheet
Manual Details
| Brand | Maxim Integrated |
|---|---|
| Pages | 17 |
| File Size | 668.49 KB |
| Published | May 26, 2026 |
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Frequently Asked Questions
What is the input voltage range supported by the MAX5033?
The converter supports a wide input voltage range from 7.5V to 76V.
Does this DC-DC converter offer protective features?
Yes, it includes undervoltage lockout, cycle-by-cycle current limit, hiccup-mode output short-circuit protection, and thermal shutdown.
What is the maximum efficiency rating of the device?
It achieves up to 94% efficiency at heavy loads.
Are there different operating temperature versions available?
Yes, specific versions like MAX5033AASA and MAX5033BASA are rated for -40°C to +125°C.