Maxim > Products > Power and Battery Management > MAX8543, MAX8544

MAX8543, MAX8544

Step-Down Controllers with Prebias Startup, Lossless Sensing, Synchronization, and OVP

Overview

Technical Documents

Ordering Info

Status

Active: In Production.

Description

The MAX8543/MAX8544 current-mode, constant-frequency PWM buck controllers operate from a 3V to 13.2V input supply and generate adjustable 0.8V to 0.9 x V_IN output voltages at loads up to 25A. They feature adjustable switching frequency and synchronization for noise-sensitive applications.

The MAX8543/MAX8544 can start with (or without) a preexisting bias on the output, without discharging the output. This feature simplifies tracking supply designs for core and I/O applications and redundant supply designs.

The MAX8543/MAX8544 use the DC resistance of the output inductor as the current-sense element for lossless, low-cost current sensing. The current-sense threshold can be set to four discrete levels to accommodate inductors with different DC resistance values.

The MAX8544 features a power-OK monitor and two MAX8544 controllers that can operate at 180° out-of-phase for dual-output applications.

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Data Sheet

Download	Rev 0	(PDF, 440kB)
E-Mail

An evaluation kit is available: MAX8544EVKIT

Key Features

Prebias Startup/Monotonic
1% Output Accuracy
Ceramic, Polymer, or Electrolytic Capacitors
200kHz to 1MHz Adjustable Frequency
160kHz to 1.2MHz Synchronization
Lossless, Foldback Current Limit
Overvoltage Protection
Enable (On/Off)
Adjustable Soft-Start
MAX8544
- Latch-Off/Autorecovery
- Power-OK Monitor
- Out-of-Phase Clock Output

Applications/Uses

Networks and Telecom
Servers
Storage
Wireless Base Stations

Key Specifications:

Step-Down Switching Regulators

Part Number

V_IN
(V)

V_OUT
(V)

Max. I_OUT
(A)

Output Adjust. Method

DC-DC Outputs

Oper. Freq.
(kHz)

Package/Pins

Smallest Available Pckg.
(mm²)

Budgetary Price

min

max

min

max

≥

≤

max w/pins

See Notes

MAX8543

13.2

0.8

Resistor

1000

30.9

MAX8544

54.2

See All Step-Down Switching Regulators (284)

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Diagram

Typical Operating Circuit

Reliability Reports

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Software/Models

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Ordering Information

Filters:

Part Number:

Package:

Temperature:

Tape and Reel

Sample

Part Number	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX8543EEE			Active	QSOP;16 pin;30.9 mm² Outline Drawing:21-0055 (PDF) Land Pattern: 90-0167 (PDF) Use pkgcode/variation: E16-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX8543EEE+			Active	QSOP;16 pin;30.9 mm² Outline Drawing:21-0055 (PDF) Land Pattern: 90-0167 (PDF) Use pkgcode/variation: E16+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8543EEE+T			Active	QSOP;16 pin;30.9 mm² Outline Drawing:21-0055 (PDF) Land Pattern: 90-0167 (PDF) Use pkgcode/variation: E16+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8543EEE-T			Active	QSOP;16 pin Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX8544EEP			Active	QSOP;20 pin;54.2 mm² Outline Drawing:21-0055 (PDF) Land Pattern: 90-0168 (PDF) Use pkgcode/variation: E20-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX8544EEP+			Active	QSOP;20 pin;54.2 mm² Outline Drawing:21-0055 (PDF) Land Pattern: 90-0168 (PDF) Use pkgcode/variation: E20+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8544EEP+T			Active	QSOP;20 pin;54.2 mm² Outline Drawing:21-0055 (PDF) Land Pattern: 90-0168 (PDF) Use pkgcode/variation: E20+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8544EEP-T			Active	QSOP;20 pin Land Pattern: Not Available	-40°C to +85°C	See data sheet

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; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product 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.

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Evaluation Kits

MAX8544EVKIT

Evaluation Kit for the MAX8544

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