MAX16929

Automotive TFT-LCD Power Supply with Boost

Converter and Gate Voltage Regulators

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General Description

The MAX16929 is a highly integrated power supply for

automotive TFT-LCD applications. The device integrates

one buck converter, one boost converter, one 1.8V/3.3V

regulator controller, and two gate voltage regulators.

The device comes in several versions to satisfy com-

mon automotive power-supply requirements (see the

Ordering Information/Selector Guide table).

Designed to operate from a single 4V to 28V supply or

5.5V to 28V supply, the device is ideal for automotive

TFT-LCD applications.

Both the buck and boost converters use spread-spec-

trum modulation to reduce peak interference and to opti-

mize EMI performance.

The sequencing input (SEQ) allows flexible sequencing

of the positive-gate and negative-gate voltage regulators.

The power-good indicator (PGOOD) indicates a failure

on any of the converters or regulator outputs. Integrated

thermal shutdown circuitry protects the device from over-

heating.

The MAX16929 is available in a 28-pin TSSOP pack-

age with exposed pad, and operates over the -40NC to

+105NC temperature range.

Applications

Automotive Dashboards

Automotive Central Information Displays

Automotive Navigation Systems

Features

S

Operating Voltage Range of 4V to 28V (Buck) or

3V to 5.5V (Boost)

S

Independent 28V Input Buck Converter Powers

TFT Bias Supply Circuitry and External Circuitry

S

High-Power (Up to 6W) Boost Output Providing Up

to 18V

S

1.8V or 3.3V Regulator Provides 500mA with

External npn Transistor

S

One Positive-Gate Voltage Regulator Capable of

Delivering 20mA at 28V

S

One Negative-Gate Voltage Regulator

S

High-Frequency Operation



2.1MHz (Buck Converter)



2.2MHz (Boost Converter)

S

Flexible Stand-Alone Sequencing

S

True Shutdown™ Boost Converter

S

6µA Low-Current Shutdown Mode (Buck)

S

Internal Soft-Start

S

Overtemperature Shutdown

S

-40NC to +105NC Operation

19-5857; Rev 0; 5/11

True Shutdown is a trademark of Maxim Integrated Products, Inc.

Typical Application Circuit appears at end of data sheet.

Ordering Information/Selector Guide appears at end of data

sheet.

E V A L U A T I O N K I T A V A I L A B L E

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.