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Automotive 4-Output Display Power Solution with Watchdog

Industry's First Automotive PMIC for Automotive Display Applications

Product Details

Key Features

Parametric specs for Multifunction PMICs
VIN (V) (min) 3.5
VIN (V) (max) 36
# Step-Down Outputs 2
# Inverting Outputs 0
# LDO Outputs 2
VOUT (V) (min) 1
VOUT (V) (max) 5
Package/Pins TQFN-CU/20
Budgetary
Price (See Notes)
3.18
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Simplified Block Diagram

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Parameters

Parametric specs for Multifunction PMICs
VIN (V) (min) 3.5
VIN (V) (max) 36
# Step-Down Outputs 2
# Inverting Outputs 0
# LDO Outputs 2
VOUT (V) (min) 1
VOUT (V) (max) 5
Package/Pins TQFN-CU/20
Budgetary
Price (See Notes)
3.18

Key Features

  • High Integration
    • Complete Display Power Solution from Automotive Battery
    • One High-Voltage 2.1A Buck Converter (5V or 3.3V)
    • One High-Voltage 100mA Low-IQ Linear Regulator (3.3V)
    • One Low-Voltage 1.6A Buck Converter (3.3V, 1.8V, 1.2V, or 1.1V)
    • One Low-Voltage Linear Regulator (3.3V, 1.8V, 1.5V, or 1.0V)
      • MAX16923GTPB: 75mA
      • MAX16923GTPC/MAX16923GTPE: 175mA
      • All other variants: 180mA
    • Power-Good Outputs
  • Integrated Watchdog Timer
  • Robust and Low EMI
    • Programmable Switching Frequency
    • Internal Spread-Spectrum Oscillator
    • Slew-Rate Controlled Switching
    • Thermal Shutdown Protection
  • Compact TQFN20 4mm x 4mm Package

Applications/Uses

  • Central Information Displays
  • Infotainment Displays
  • Instrument Clusters

Description

The MAX16923 is a 4-channel power-management IC designed to accommodate the main rails used in modern automotive TFT displays. The MAX16923 and the MAX20069 TFT power supply and LED backlight driver combine to provide a two-chip solution to all automotive display power-supply requirements.

The MAX16923 integrates a high-voltage buck converter that transforms battery voltages into a 5V or 3.3V intermediate rail. In addition, a high-voltage, always-on, low-quiescent-current linear regulator supplies power at 3.3V.

The low-voltage section consists of a fully-integrated DC/DC converter and an LDO running off the intermediate rail. Section output power is available in several low-voltage combinations (see the Ordering Information table). In addition, an integrated watchdog timer guards against runaway code.

A single START control pin initiates the start-up sequence, thereby simplifying device control. The MAX16923's external pMOSFET control block allows battery voltage to be switched to a downstream device, such as a backlight boost converter.

The MAX16923 is available in a TQFN package and operates in the -40°C to 105°C temperature range.

Design Solution: PMIC Streamlines Automotive TFT-LCD Display Design ›

Simplified Block Diagram

MAX16923: Typical Application Circuit MAX16923: 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 .