Maxim > Products > Power and Battery Management > MAX15048, MAX15049

MAX15048, MAX15049

Triple-Output Buck Controllers with Tracking/Sequencing

Low-Cost Triple Buck Controllers with Sequencing and Tracking in Small Form Factor (5mm x 5mm)

Overview

Technical Documents

Ordering Info

Status

Active: In Production.

Description

The MAX15048/MAX15049 are triple-output pulse-width modulated (PWM), step-down, DC-DC controllers with tracking (MAX15048) and sequencing (MAX15049) options. The devices operate over the 4.7V to 23V input-voltage range. Each PWM controller provides an adjustable output down to 0.6V and delivers up to 15A of load current with excellent load and line regulation. The MAX15049 can start into prebiased outputs. The MAX15048/MAX15049 are optimized for high-performance, small-size power-management solutions.

The options of coincident or ratiometric tracking (MAX15048) or output sequencing (MAX15049) allow the tailoring of the power-up/power-down sequence depending on the system requirements. Each of the MAX15048/MAX15049 PWM sections utilizes a voltage-mode control scheme with external compensation, allowing for good noise immunity and maximum flexibility with a wide selection of inductor values and capacitor types. Each PWM section operates at the same fixed switching frequency that is programmable from 200kHz to 1.2MHz. Each converter, operating at up to 1.2MHz with 120° out-of-phase, increases the input capacitor ripple frequency up to 3.6MHz, reducing the RMS input ripple current and thus the size of the input bypass capacitor significantly. The MAX15048/MAX15049 integrate boost diodes for additional system cost savings.

The MAX15048/MAX15049 include internal undervoltage lockout (UVLO) with hysteresis and digital soft-start (MAX15048/MAX15049)/soft-stop (MAX15048) for glitch-free power-up and power-down of the converter. The power-good circuitry (PGOOD) monitors all three outputs and provides a power-good signal to the system control/processor when all outputs are within regulation. Protection features include lossless valley-mode current limit, hiccup mode output short-circuit protection, and thermal shutdown.

The MAX15048/MAX15049 are available in space-saving, 5mm x 5mm, lead-free, 32-pin TQFN-EP packages and are specified for operation over the -40°C to +85°C extended temperature range.

Data Sheet

Download	Rev 0	(PDF, 3.5MB)
E-Mail

An evaluation kit is available: MAX15049EVKIT

Key Features

4.7V to 23V or 5V ±10% Input Voltage Range
Triple-Output Synchronous Buck Controllers with 120° Out-of-Phase Operation
Prebias Power-Up (MAX15049)
Output Voltage Adjustable Down to 0.6V
Coincident/Ratiometric Tracking (MAX15048)
Accurate Sequencing Through Enable Threshold (MAX15049)
External Compensation for Maximum Flexibility
Digital Soft-Start (MAX15048/MAX15049) and Soft-Stop (MAX15048)
Lossless Valley-Mode Current Sensing Using R_DS(ON) of the Low-Side MOSFET
PGOOD Output
Integrated Bootstrap Diodes
Programmable Switching Frequency from 200kHz to 1.2MHz
Thermal Shutdown and Hiccup Mode Short-Circuit Protection
Space-Saving (5mm x 5mm), 32-Pin TQFN Package

Applications/Uses

ASIC/CPU/DSP Core and I/O Voltages
Base-Station Power Supplies
DDR Power Supply
Point-of-Load DC-DC Converters
RAID Control Power Supplies
Set-Top Boxes
Telecom and Networking Power Supplies

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

MAX15048

4.7

0.6

Resistor

1200

MAX15049

See All Step-Down Switching Regulators (288)

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

Simplified Typical Operating Circuit (Coincident Tracking)

Application Notes

Tutorial 4701		Introduction to Programmable Logic Controllers (PLCs) and the Operational Function of Main System Modules
Tutorial 5132		Power-Supply Solutions for Xilinx FPGAs
Tutorial 5133		Power-Supply Solutions for Altera FPGAs

Product Guides

Enterprise Power (PDF)

Reliability Reports

Show FIT data for:
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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
MAX15048ETJ+			Active	TQFN;32 pin;26 mm² Outline Drawing:21-0140 (PDF) Land Pattern: 90-0012 (PDF) Use pkgcode/variation: T3255+4*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX15048ETJ+T			Active	QFN; Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX15049ETJ+			Active	TQFN;32 pin;26 mm² Outline Drawing:21-0140 (PDF) Land Pattern: 90-0012 (PDF) Use pkgcode/variation: T3255+4*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX15049ETJ+T			Active	TQFN;32 pin;26 mm² Outline Drawing:21-0140 (PDF) Land Pattern: 90-0012 (PDF) Use pkgcode/variation: T3255+4*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis

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

MAX15049EVKIT

Evaluation Kit for the MAX15049

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