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Status

Active: In Production.

Data Sheet

FULL DATA SHEET (PDF, 360kB) Download   E-Mail

Description

The MAX1954A synchronous current-mode, pulse-width modulation (PWM) buck controller is pin compatible with the popular MAX1954 and is suitable for applications where cost and size are critical. The MAX1954A operates from an input voltage range of 3.0V to 13.2V, independent of the IC supply. The output voltage is adjustable down to 0.8V. The IC operates at a fixed 300kHz switching frequency and provides up to 25A of output current with efficiency up to 95%. This controller has excellent transient response resulting in smaller output capacitance. The MAX1954A features foldback current limiting that greatly reduces input current and component power dissipation during output overload or short-circuit conditions. The compensation and shutdown control (COMP) input, in addition to providing compensation to the error amplifier, can be pulled low to shut down the converter. An input undervoltage lockout is provided to ensure proper operation during power sags to prevent the external power MOSFETs from overheating. Internal digital soft-start is included to reduce inrush current and save an external capacitor. The MAX1954A is available in a tiny 10-pin µMAX® package to minimize PC board space.

An evaluation kit is available:  MAX1954AEVKIT  

Key Features		Applications/Uses
Current-Mode Controller Fixed-Frequency PWM Foldback Current Limit Output Down to 0.8V with ±1% FB Accuracy 3.0V to 13.2V Input Voltage 300kHz Switching Frequency 25A Output-Current Capability 93% Efficiency All-N-Channel-MOSFET Design for Low Cost No Current-Sense Resistor Needed Internal Digital Soft-Start Small 10-Pin µMAX Package		Graphic Cards and Video Cards Low-Voltage Distributed Power Microprocessor Cores PCs and Servers Printers and Scanners Telecom/Networks

Diagram

Typical Operating Circuit

Application Notes

Application Note 3440: An Accurate Control Loop Model for Current-Mode Step-Down Controllers - MAX1954A

Evaluation Kits

MAX1954AEVKIT

Reliability Reports

Show FIT data for: MAX1954A Request Reliability Report for: MAX1954A

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: 1-8 of 8

MAX1954A	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX1954AEUB-G05			Active	Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX1954AEUB-TG05			Active	µMAX;10 pin;15.4 mm² Outline Drawing: 21-0061 (PDF) Land Pattern: 90-0330 (PDF) Use pkgcode/variation: U10-2*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1954AEUB-G077			Active	Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX1954AEUB-TG077			Active	µMAX;10 pin;15.4 mm² Outline Drawing: 21-0061 (PDF) Land Pattern: 90-0330 (PDF) Use pkgcode/variation: U10-2*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1954AEUB			Active	µMAX;10 pin;15.4 mm² Outline Drawing: 21-0061 (PDF) Land Pattern: 90-0330 (PDF) Use pkgcode/variation: U10-2*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1954AEUB-T			Active	µMAX;10 pin;15.4 mm² Outline Drawing: 21-0061 (PDF) Land Pattern: 90-0330 (PDF) Use pkgcode/variation: U10-2*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1954AEUB+			Active	µMAX;10 pin;15.4 mm² Outline Drawing: 21-0061 (PDF) Land Pattern: 90-0330 (PDF) Use pkgcode/variation: U10+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1954AEUB+T			Active	µMAX;10 pin;15.4 mm² Outline Drawing: 21-0061 (PDF) Land Pattern: 90-0330 (PDF) Use pkgcode/variation: U10+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis

More Information

MAX1954APower Supply Cookbook

Related Products

MAX1953, MAX1954, MAX1957 Low-Cost, High-Frequency, Current-Mode PWM Buck Controllers MAX8545, MAX8546, MAX8548 Low-Cost, Wide Input Range, Step-Down Controllers with Foldback Current Limit

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