MAX629
PRODUCTION28V, Low-Power, High-Voltage, Boost or Inverting DC-DC Converter
- Part Models
- 2
- 1ku List Price
- Starting From $5.80
Overview
- Internal, 500mA, 28V N-Channel Switch (No External FET Required)
- Generates Positive or Negative Output Voltages
- 80µA Supply Current
- 1µA Max Shutdown Current
- Up to 300kHz Switching Frequency
- Adjustable Current Limit Allows Use of Small, Inexpensive Inductors
- 8-Pin SO Package
The MAX629 low-power DC-DC converter features an internal N-channel MOSFET switch and programmable current limiting. It is designed to supply positive or negative bias voltages up to ±28V from input voltages in the 0.8V to VOUT range, and can be configured for boost, flyback, and SEPIC topologies.
The MAX629's current-limited pulse-frequency-modulation (PFM) control scheme provides high efficiency over a wide range of load conditions. An internal, 0.5A N-channel MOSFET switch reduces the total part count, and a high switching frequency (up to 300kHz) allows for tiny surface-mount magnetics.
The MAX629's combination of low supply current, logic-controlled shutdown, small package, and tiny external components makes it an extremely compact and efficient high-voltage biasing solution that's ideal for battery-powered applications. The MAX629 is available in an 8-pin SO package.
Applications
- 2-Cell and 3-Cell Battery-Powered Applications
- High-Efficiency DC-DC Boost Converters
- Palmtop Computers
- Positive or Negative LCD Bias Generators
- Varactor Tuning Diode Bias
Documentation
Data Sheet 1
Design Note 2
Technical Articles 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| MAX629ESA+ | Small-Outline IC Narrow (0.15in) | ||
| MAX629ESA+T | Small-Outline IC Narrow (0.15in) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Apr 7, 2023 - 2361C WAFER FAB |
||
| MAX629ESA+ | PRODUCTION | |
| MAX629ESA+T | PRODUCTION | |
|
Oct 30, 2020 - 1702R2 ASSEMBLY |
||
| MAX629ESA+ | PRODUCTION | |
| MAX629ESA+T | PRODUCTION | |
|
Apr 20, 2026 - 2571A PIN/ERRATA |
||
| MAX629ESA+T | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Evaluation Kits
Evaluation Kit for the MAX629