MAX16929 Datasheet, PDF (1/25 Pages) Maxim Integrated Products – Automotive TFT-LCD Power Supply with Boost Converter and Gate Voltage Regulators

19-5857; Rev 0; 5/11
EVALUATION KIT AVAILABLE
MAX16929
Automotive TFT-LCD Power Supply with Boost
Converter and Gate Voltage Regulators
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
Ordering Information/Selector Guide appears at end of data
sheet.
Typical Application Circuit appears at end of data sheet.
True Shutdown is a trademark of Maxim Integrated Products, Inc.
For related parts and recommended products to use with this part, refer to: www.maxim-ic.com/MAX16929.related
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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.