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Status

Active: In Production.

Data Sheet

FULL DATA SHEET (PDF, 144kB) Download   E-Mail

Description

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.

An evaluation kit is available:  MAX629EVKIT  

Key Features		Applications/Uses
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		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

Diagram

Typical Operating Circuit

Application Notes

Application Note 817: Using Thermistors in Temperature Tracking Power Supplies - MAX629 Application Note 3467: SMBus I/O Expander Controls LCD Bias Voltage - MAX629

Evaluation Kits

MAX629EVKIT

Reliability Reports

Reliability Report: MAX629.pdf Show FIT data for: MAX629

Software/Models

none

Ordering Information

Notes: Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day. Part number suffixes: T or T&R = tape and reel;+ = RoHS/lead-free;# = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.

Devices: 1-7 of 7

MAX629	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX629C/D			Active	DICE SALES;NA pin;0 mm² Land Pattern: Not Applicable Use pkgcode/variation: DICE*		See data sheet
MAX629ESA+G071			Active	Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX629ESA+TG071			Active	SOIC(N);8 pin;30.9 mm² Outline Drawing: 21-0041 (PDF) Land Pattern: 90-0096 (PDF) Use pkgcode/variation: S8+4*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX629ESA			Active	SOIC(N);8 pin;30.9 mm² Outline Drawing: 21-0041 (PDF) Land Pattern: 90-0096 (PDF) Use pkgcode/variation: S8-4*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX629ESA-T			Active	SOIC(N);8 pin;30.9 mm² Outline Drawing: 21-0041 (PDF) Land Pattern: 90-0096 (PDF) Use pkgcode/variation: S8-4*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX629ESA+			Active	SOIC(N);8 pin;30.9 mm² Outline Drawing: 21-0041 (PDF) Land Pattern: 90-0096 (PDF) Use pkgcode/variation: S8+4*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX629ESA+T			Active	SOIC(N);8 pin;30.9 mm² Outline Drawing: 21-0041 (PDF) Land Pattern: 90-0096 (PDF) Use pkgcode/variation: S8+4*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis

Notes and Comments

30V/0.5A internal switch, low supply current

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