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

Applications/Uses

Automotive Central Information Displays
Automotive Dashboards
Automotive Navigation Systems

DataSheet

title	Download file
MAX16928 Data Sheet	MAX16928.pdf

Parametrics

Part Number	Primary Topology	Monitor/Control Features	DC-DC/Power Features	LCD/LED/Flash/CCD Features	V_IN (V)	V_IN (V)	V_OUT (V)	V_OUT (V)	Max. I_OUT (A)	Oper. Freq. (kHz)	Inverting Outputs	Package/Pins	Budgetary Price
Part Number	Primary Topology	Monitor/Control Features	DC-DC/Power Features	LCD/LED/Flash/CCD Features	min	max	min	max	Max. I_OUT (A)	Oper. Freq. (kHz)	Inverting Outputs	Package/Pins	See Notes
MAX16928	Inverting Step-Up Step-Up/Down	Shutdown	Avg. Current Mode Control Current Limit Internal Switch	TFT Bias	3	5.5	-24	29	1.5	2000	1	TSSOP-EP/20	$1.47 @1k

Design kits & evaluation modules

MAX16928EVKIT

Ordering Information

Part Number	Status	Package	Temp	RoHS
MAX16928AGUP/V+	Active	TSSOP-EP,;20 pin;42.9 mm²	-40°C to +105°C	Lead Free
MAX16928AGUP/V+T	Active	TSSOP-EP,;20 pin;42.9 mm²	-40°C to +125°C	Lead Free
MAX16928AUP/V+	No Longer Available	TSSOP-EP,;20 pin;42.9 mm²	-40°C to +125°C	Lead Free
MAX16928AUP/V+T	No Longer Available	TSSOP-EP,;20 pin;42.9 mm²	-40°C to +125°C	Lead Free
MAX16928BGUP/V+	Active	TSSOP-EP,;20 pin;42.9 mm²	-40°C to +105°C	Lead Free
MAX16928BGUP/V+T	Active	TSSOP-EP,;20 pin;42.9 mm²	-40°C to +125°C	Lead Free
MAX16928CGUP/V+	Active	TSSOP-EP,;20 pin;42.9 mm²	-40°C to +105°C	Lead Free
MAX16928CGUP/V+T	Active	TSSOP-EP,;20 pin;42.9 mm²	-40°C to +125°C	Lead Free
MAX16928DGUP/V+	Active	TSSOP-EP,;20 pin;42.9 mm²	-40°C to +105°C	Lead Free
MAX16928DGUP/V+T	Active	TSSOP-EP,;20 pin;42.9 mm²	-40°C to +125°C	Lead Free

MAX16928.pdf MAX16928

Typical Operating Circuit MAX16928