台湾致新 G5521AR51U TQFN4X4-24 代理商主推

G5521AR51U--DC-DC转换器

General Description
The G5521A includes a high-performance boost regulator,a low dropout linear regulator (LDO), a gate pulse modulator(GPM), a voltage detector, a VCOM buffer (unity-gainOPA), and a VGH charge pump controller for activematrix

thin-film transistor (TFT) liquid-crystal displays (LCDs).The boost converter provides the regulated supply voltagefor the panel source driver ICs. The converter is ahigh switching frequency (640kHz or 1.2MHz) currentmode regulator with an integrated 20V N-Channel0.2Ω MOSFET that allows the use of ultra-small inductorsand ceramic capacitors. It provides fast transient responseto pulsed loading while achieving efficiency over90%. The device can produce output voltage as high as18V from an input as low as 2.8V. Soft-Start is programmedby external capacitor, which sets the input-current ramp-rate. The low-dropout (LDO) linear regulatorcan supply up to 350mA current while input voltage is3.3V. It uses an internal PMOS as the pass device. It issuitable for the supply voltage of the timing controller.

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