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MAX15026

Low-Cost, Small, 4.5V to 28V Wide Operating Range, DC-DC Synchronous Buck Controller

Low-Cost, Versatile DC-DC Controller Operates from 4.5V to 28V Suitable for Multiple Applications

Overview

Technical Documents

Ordering Info

Status

Active: In Production.

Description

The MAX15026 synchronous step-down controller operates from a 4.5V to 28V input voltage range and generates an adjustable output voltage from 85% of the input voltage down to 0.6V while supporting loads up to 25A. The device allows monotonic startup into a prebiased bus without discharging the output and features adaptive internal digital soft-start.

The MAX15026 offers the ability to adjust the switching frequency from 200kHz to 2MHz with an external resistor. The MAX15026's adaptive synchronous rectification eliminates the need for an external freewheeling Schottky diode. The device also utilizes the external low-side MOSFET's on-resistance as a current-sense element, eliminating the need for a current-sense resistor. This protects the DC-DC components from damage during output overloaded conditions or output short-circuit faults without requiring a current-sense resistor. Hiccup-mode current limit reduces power dissipation during short-circuit conditions. The MAX15026 includes a power-good output and an enable input with precise turn-on/turn-off threshold, which can be used for input supply monitoring and for power sequencing.

Additional protection features include sink-mode current limit and thermal shutdown.

Sink-mode current limit prevents reverse inductor current from reaching dangerous levels when the device is sinking current from the output.

The MAX15026 is available in a space-saving and thermally enhanced 3mm x 3mm, 14-pin TDFN-EP package. The MAX15026 operates over the extended -40°C to +85°C and automotive -40°C to +125°C temperature ranges.

The MAX15026C is designed to provide additional margin for break-before-make times.

Data Sheet

Download	Rev 3	(PDF, 360kB)
E-Mail

An evaluation kit is available: MAX15026BEVKIT MAX15026CEVKIT

Key Features

4.5V to 28V or 5V ±10% Input Supply Range
0.6V to (0.85 x V_IN) Adjustable Output
Adjustable 200kHz to 2MHz Switching Frequency
Ability to Start into a Prebiased Load
Lossless, Cycle-by-Cycle Valley Mode Current Limit with Adjustable, Temperature-Compensated Threshold
Sink-Mode Current-Limit Protection
Adaptive Internal Digital Soft-Start
±1% Accurate Voltage Reference
Internal Boost Diode
Adaptive Synchronous Rectification Eliminates External Freewheeling Schottky Diode
Hiccup-Mode Short-Circuit Protection
Thermal Shutdown
Power-Good Output and Enable Input for Power Sequencing
±5% Accurate Enable Input Threshold
AEC-Q100 Qualified (MAX15026B)

Applications/Uses

DSP Power Supplies
LCD TV Secondary Supplies
Points-of-Load Regulators
Power Modules
Set-Top Boxes
Switches/Routers

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

MAX15026

4.5

0.6

Resistor

2000

TDFN-EP/14

9.6

$1.59 @1k

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

Functional Diagram

Application Notes

Reference Design 4365

Reference Design Using the MAX15026 for an Auxiliary Power Supply for LCD TVs or Set-Top Boxes

Product Guides

Enterprise Power (PDF)

Reliability Reports

Reliability Report:	MAX15026.pdf
Show FIT data for:

Software/Models

MAX15026 SPICE Macro Model

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
MAX15026BATD+T			Active	TDFN-EP;14 pin;9.6 mm² Outline Drawing:21-0137 (PDF) Land Pattern: 90-0063 (PDF) Use pkgcode/variation: T1433+2*	-40°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX15026BETD+			Active	TDFN-EP;14 pin;9.6 mm² Outline Drawing:21-0137 (PDF) Land Pattern: 90-0063 (PDF) Use pkgcode/variation: T1433+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX15026BETD+T			Active	TDFN-EP;14 pin;9.6 mm² Outline Drawing:21-0137 (PDF) Land Pattern: 90-0063 (PDF) Use pkgcode/variation: T1433+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX15026BETD+TC91			Active	TDFN-EP;14 pin;9.6 mm² Outline Drawing:21-0137 (PDF) Land Pattern: 90-0063 (PDF) Use pkgcode/variation: T1433+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX15026BETD/V+T			Active	TDFN-EP;14 pin;9.6 mm² Outline Drawing:21-0137 (PDF) Land Pattern: 90-0063 (PDF) Use pkgcode/variation: T1433+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX15026CATD+			Active	TDFN-EP;14 pin;9.6 mm² Outline Drawing:21-0137 (PDF) Land Pattern: 90-0063 (PDF) Use pkgcode/variation: T1433+2*	-40°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX15026CATD+T			Active	TDFN-EP;14 pin;9.6 mm² Outline Drawing:21-0137 (PDF) Land Pattern: 90-0063 (PDF) Use pkgcode/variation: T1433+2*	-40°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX15026CETD+			Active	TDFN-EP;14 pin;9.6 mm² Outline Drawing:21-0137 (PDF) Land Pattern: 90-0063 (PDF) Use pkgcode/variation: T1433+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX15026CETD+T			Active	TDFN-EP;14 pin;9.6 mm² Outline Drawing:21-0137 (PDF) Land Pattern: 90-0063 (PDF) Use pkgcode/variation: T1433+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX15026CETD+TW			Active	TDFN-EP;14 pin;9.6 mm² Outline Drawing:21-0137 (PDF) Land Pattern: 90-0063 (PDF) Use pkgcode/variation: T1433+2*	-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.

Similar Products by Function

MAX8545, MAX8546, MAX8548	Low-Cost, Wide Input Range, Step-Down Controllers with Foldback Current Limit
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Evaluation Kits

MAX15026BEVKIT	Evaluation Kit for the MAX15026B
MAX15026CEVKIT	Evaluation Kit for the MAX15026C

Products with Similar Part Numbers

MAX15026CEVKIT	Evaluation Kit for the MAX15026C
MAX15026BEVKIT	Evaluation Kit for the MAX15026B

More Information

Topmark Coding	MAX15026
New Product Press Release	[ 2009-02-12 ]
Power Supply Cookbook	MAX15026

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Information Index

Overview		Technical Documents		Ordering Info		Related Products
Description Key Features Applications/Uses Key Specifications Diagram Notes and Comments		Data Sheet Application Notes Evaluation Kits Product Guides Reliability Reports Software/Models		Price and Availability Samples Buy Online Package Information Lead-Free Information		Similar Products by Function Similar Products by Application Evaluation Kits Products with Similar Part Numbers Products Used With This

Document Ref.: 19-4108 Rev 3; 2011-04-25
This page last modified: 2011-04-25