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

High-Voltage TFT-LCD Power Supply Offers a Wide Array of Trim Options to Fit Any Automotive Display Power Requirements

Product Details

Key Features

Parametric specs for Multifunction PMICs
VIN (V) (min) 4
VIN (V) (max) 28
# Step-Down Outputs 1
# Step-Up Outputs 2
# Inverting Outputs 1
# LDO Outputs 1
VOUT (V) (min) -24
VOUT (V) (max) 29
Package/Pins TSSOP HYBRID/28
Budgetary
Price (See Notes)
2.82
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Simplified Block Diagram

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Parameters

Parametric specs for Multifunction PMICs
VIN (V) (min) 4
VIN (V) (max) 28
# Step-Down Outputs 1
# Step-Up Outputs 2
# Inverting Outputs 1
# LDO Outputs 1
VOUT (V) (min) -24
VOUT (V) (max) 29
Package/Pins TSSOP HYBRID/28
Budgetary
Price (See Notes)
2.82

Key Features

  • Operating Voltage Range of 4V to 28V (Buck) or 3V to 5.5V (Boost)
  • Independent 28V Input Buck Converter Powers TFT Bias Supply Circuitry and External Circuitry
  • 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 Operation
    • 2.1MHz (Buck Converter)
    • 2.2MHz (Boost Converter)
  • Flexible Stand-Alone Sequencing
  • True Shutdown™ Boost Converter
  • 6μA Low-Current Shutdown Mode (Buck)
  • Internal Soft-Start
  • Overtemperature Shutdown
  • -40°C to +105°C Operation

Applications/Uses

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

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 common automotive power-supply requirements (see the Ordering Information/Selector Guide table in the full data sheet).

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-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 MAX16929 is available in a 28-pin TSSOP package with exposed pad, and operates over the -40°C to +105°C temperature range.

Simplified Block Diagram

MAX16929: Typical Application Circuit MAX16929: Typical Application 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 .