MAX16928: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

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.

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
MAX16928: Typical Operating Circuit
MAX16928: Typical Operating Circuit
  • Automotive Central Information Displays
  • Automotive Dashboards
  • Automotive Navigation Systems
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MAX16928 Data SheetMAX16928.pdf
Part NumberPrimary TopologyMonitor/Control FeaturesDC-DC/Power FeaturesLCD/LED/Flash/CCD FeaturesVIN
Oper. Freq.
Inverting OutputsPackage/PinsBudgetary
minmaxminmaxSee Notes
ShutdownAvg. Current Mode Control
Current Limit
Internal Switch
TFT Bias35.5-24291.520001TSSOP-EP/20$1.47 @1k
Design kits & evaluation modules
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX16928AGUP/V+ActiveTSSOP-EP,;20 pin;42.9 mm²-40°C to +105°CLead Free
MAX16928AGUP/V+TActiveTSSOP-EP,;20 pin;42.9 mm²-40°C to +125°CLead Free
MAX16928AUP/V+No Longer AvailableTSSOP-EP,;20 pin;42.9 mm²-40°C to +125°CLead Free
MAX16928AUP/V+TNo Longer AvailableTSSOP-EP,;20 pin;42.9 mm²-40°C to +125°CLead Free
MAX16928BGUP/V+ActiveTSSOP-EP,;20 pin;42.9 mm²-40°C to +105°CLead Free
MAX16928BGUP/V+TActiveTSSOP-EP,;20 pin;42.9 mm²-40°C to +125°CLead Free
MAX16928CGUP/V+ActiveTSSOP-EP,;20 pin;42.9 mm²-40°C to +105°CLead Free
MAX16928CGUP/V+TActiveTSSOP-EP,;20 pin;42.9 mm²-40°C to +125°CLead Free
MAX16928DGUP/V+ActiveTSSOP-EP,;20 pin;42.9 mm²-40°C to +105°CLead Free
MAX16928DGUP/V+TActiveTSSOP-EP,;20 pin;42.9 mm²-40°C to +125°CLead Free
MAX16928.pdf MAX16928
Typical Operating Circuit MAX16928