MAX8758

ABSOLUTE MAXIMUM RATINGS
IN,SHDN, CTL, LDO to GND ...................................-0.3V to +6V
SUPB, LX, OUT to GND..........................................-0.3V to +14V
OUTB, NEGB, POSB to GND .....................-0.3V to (SUPB + 0.3V)
THR, DLP, MODE, FREQ, COMP, FB,
SS to GND.................................................-0.3V to VLDO + 0.3V
PGND to GND .....................................................-0.3V to + 0.3V
SRC to GND .........................................................-0.3V to + 30V
GON, DRN to GND ......................................-0.3V to VSRC + 0.3V
GON RMS Current Rating................................................± 50mA
OUTB RMS Current Rating ..............................................± 60mA
LX RMS Current Rating .........................................................1.6A
Continuous Power Dissipation (TA = +70°C)
24-Pin, 4mm x 4mm Thin QFN
(derate 16.9mW/°C above +70°C)...........................1349.1mW
Operating Temperature Range .........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range ...........................-65°C to +160°C
Lead Temperature (soldering, 10s) .................................+300°C

Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating onditions for extended periods may affect device reliability.

The MAX8758 includes a high-performance step-up regulator, a high-speed operational amplifier, and a ogiccontrolled, high-voltage switch-control block with programmable delay. The device is optimized for thin-film transistor (TFT) liquid-crystal display (LCD) applications.

The step-up DC-DC regulator MAX8758 provides the regulated supply voltage for the panel source driver ICs. The converter is a high-frequency (640kHz/1.2MHz), current-mode regulator with an integrated 14V n-channel power MOSFET. The high-switching frequency allows the use of ultra-small inductors and ceramic capacitors. The current-mode control architecture of MAX8758 provides fast transient response to pulsed loads. The regulator achieves efficiencies over 85% by  ootstrapping the supply rail of the internal gate driver from the step-up regulator output. The step-up regulator MAX8758 features undervoltage lockout (UVLO), soft-start, and internal current limit. The high-current operational amplifier is designed to drive the LCD backplane (VCOM). The amplifier features high output current (±150mA), fast slew rate (7.5V/s), wide bandwidth (12MHz), and rail-to-rail inputs and outputs.

The MAX8758 is available in a 24-pin, 4mm x 4mm, thin QFN package with a maximum thickness of 0.8mm for ultra-thin LCD panels. The device operates over the -40°C to +85°C temperature range.