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Automotive TFT-LCD Power Supply with Boost Converter and Gate Voltage Regulators

Rugged Automotive TFT-LCD Power Supply Operates at 2.2MHz to Reduce Solution Size and Minimize AM Band Interference

Product Details

Key Features

Applications/Uses

Parametric specs for Multifunction PMICs
VIN (V) (min) 3
VIN (V) (max) 5.5
# Step-Up Outputs 1
# Inverting Outputs 1
# LDO Outputs 1
VOUT (V) (min) -24
VOUT (V) (max) 29
Package/Pins TSSOP/20
Budgetary
Price (See Notes)
1.54
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Simplified Block Diagram

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Parameters

Parametric specs for Multifunction PMICs
VIN (V) (min) 3
VIN (V) (max) 5.5
# Step-Up Outputs 1
# Inverting Outputs 1
# LDO Outputs 1
VOUT (V) (min) -24
VOUT (V) (max) 29
Package/Pins TSSOP/20
Budgetary
Price (See Notes)
1.54

Key Features

  • High-Power (Up to 6W) Boost Output Providing Up to 18V
  • 1.8V or 3.3V Regulator Provides 500mA with External npn Transistor
  • One Positive-Gate Voltage Regulator Capable of Delivering 20mA at 28V
  • One Negative-Gate Voltage Regulator
  • High-Frequency 2.2MHz Operation
  • Flexible Stand-Alone Sequencing
  • True Shutdown Boost Converter
  • Internal Soft-Start
  • Overtemperature Shutdown
  • -40°C to +105°C Operation
  • AEC-Q100 Qualified

Applications/Uses

  • Automotive Central Information Displays
  • Automotive Dashboards
  • Automotive Navigation Systems

Description

The MAX16928 is a highly integrated power supply for automotive TFT-LCD applications. The device integrates one boost converter, one 1.8V/3.3V regulator controller, and two gate voltage regulators. The device comes in several versions to satisfy common automotive TFT-LCD power-supply requirements (see the Ordering Information table in the full data sheet).

The boost converter uses spread-spectrum modulation to reduce peak interference and to optimize 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 overheating.

The MAX16928 is available in a 20-pin TSSOP package with exposed pad and operates over the -40°C to +105°C temperature range.

Simplified Block Diagram

MAX16928: Typical Operating Circuit MAX16928: Typical Operating Circuit Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .