MAX16929: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

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.

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
MAX16929: Typical Application Circuit
MAX16929: Typical Application Circuit
  • Automotive Central Information Displays
  • Automotive Dashboards
  • Automotive Navigation Systems
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MAX16929 Data SheetMAX16929.pdf
Part NumberPrimary TopologyMonitor/Control FeaturesDC-DC/Power FeaturesVIN
Oper. Freq.
Inverting OutputsPackage/PinsBudgetary
minmaxminmaxSee Notes
MAX16929Step-Up/DownLow Batt./POK OutputAvg. Current Mode Control
Current Limit
Fixed Freq./PWM
Internal Switch
Soft Start
428-24292220001TSSOP-EP/28$2.29 @1k
Design kits & evaluation modules
Quality and Environmental Data
Related Products
  • MAX16927:Automotive TFT-LCD Power Supply with Boost, Buck, and Cuk Converters, VCOM Buffers, Gate Drivers, and SPI Interface
  • MAX16928:Automotive TFT-LCD Power Supply with Boost Converter and Gate Voltage Regulators
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX16929AGUI/V+ActiveTSSOP-EP,;28 pin;63.7 mm²-40°C to +105°CLead Free
MAX16929AGUI/V+TActiveTSSOP-EP,;28 pin;63.7 mm²-40°C to +105°CLead Free
MAX16929BGUI/V+ActiveTSSOP-EP,;28 pin;63.7 mm²-40°C to +105°CLead Free
MAX16929BGUI/V+TActiveTSSOP-EP,;28 pin;63.7 mm²-40°C to +105°CLead Free
MAX16929CGUI/V+ActiveTSSOP-EP,;28 pin;63.7 mm²-40°C to +105°CLead Free
MAX16929CGUI/V+TActiveTSSOP-EP,;28 pin;63.7 mm²-40°C to +105°CLead Free
MAX16929DGUI/V+ActiveTSSOP-EP,;28 pin;63.7 mm²-40°C to +105°CLead Free
MAX16929DGUI/V+TActiveTSSOP-EP,;28 pin;63.7 mm²-40°C to +105°CLead Free
MAX16929EGUI/V+ActiveTSSOP-EP,;28 pin;63.7 mm²-40°C to +105°CLead Free
MAX16929EGUI/V+TActiveTSSOP-EP,;28 pin;63.7 mm²-40°C to +105°CLead Free
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX16929FGUI/V+ActiveTSSOP-EP,;28 pin;63.7 mm²-40°C to +105°CLead Free
MAX16929FGUI/V+TActiveTSSOP-EP,;28 pin;63.7 mm²-40°C to +105°CLead Free
MAX16929GGUI/V+ActiveTSSOP-EP,;28 pin;63.7 mm²-40°C to +105°CLead Free
MAX16929GGUI/V+TActiveTSSOP-EP,;28 pin;63.7 mm²-40°C to +105°CLead Free
MAX16929GUI/V+ActiveTSSOP-EP,;28 pin;63.7 mm²-40°C to +105°CLead Free
MAX16929GUI/V+TActiveTSSOP-EP,;28 pin;63.7 mm²-40°C to +105°CLead Free
MAX16929HGUI/V+ActiveTSSOP-EP,;28 pin;63.7 mm²-40°C to +105°CLead Free
MAX16929HGUI/V+TActiveTSSOP-EP,;28 pin;63.7 mm²-40°C to +105°CLead Free
MAX16929IGUI/V+ActiveTSSOP-EP,;28 pin;63.7 mm²-40°C to +105°CLead Free
MAX16929IGUI/V+TActiveTSSOP-EP,;28 pin;63.7 mm²-40°C to +105°CLead Free
MAX16929.pdf MAX16929
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典型应用电路 MAX16929