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R1293K Series

Multi power supply IC with Amplifier for LCD

Data Sheet / Flyer

The R1293K Series are multi power supply ICs dedicated for mid-size TFT LCD panels. Each of the IC consists of a PWM control step-up DC/DC converter, an LDO regulator, a VCOM amplifier and six GAMMA amplifiers. The output noise can be reduced by SEL pin. (SEL pin "H": normal mode, SEL pin "L": low noise mode.) The MOSFET for step-up DC/DC converter is built-in and, low power operation is realized by standby mode. The package is 4mm square QFN(PLP)0404-32.

Supply Current (IIN)	Typ. 300µA (No switching)
Standby Current (ISTB)	Max. 90µA (In standby)
(DC/DC Part)
Input Voltage Range (VIN)	2.2V to 5.5V
Feedback Voltage (VFB)	1.0V (The output voltage is adjustable up to 16.0V with external resistors.).
Feedback Voltage Accuracy	± 15mV
Oscillator Frequency (fosc)	300kHz to 1MHz with an external resistor
Oscillator Maximum Duty Cycle (Maxduty)	Set with an external resistor. (Limit typ.90%)
OVP Voltage (VOVP1)	Typ. 21.0V
UVLO Detect Voltage (VUVLO1)	Typ. 1.9V
Soft Start Time (tstart)	Typ. 10ms
Coil-current Limit Circuit	Current Limit Typ. 3A
Latch Protection Circuit	Delay time for protection adjustable with an external capacitor
(LDO Part)
Input Voltage Range (VIN_LDO)	2.2V to 5.5V
Peak Current Limit Circuit	Min. 350mA
Output Voltage Range (VOUT)	1.8V to 2.5V (Internally fixed)
Output Voltage Accuracy	± 1%
Output Current	300mA
Dropout Voltage (VDIF)	Typ. 0.4V (VSET>=2.4V, IOUT=250mA)
Ripple Rejection (RR)	Typ. 65dB (f=1kHz)
Fold-back Protection Circuit	Current limit Typ. 70mA
(Buffer Amplifier Part)
Input Voltage Range for Amplifiers (VBUFF)	5.0V to 16.0V
Input Voltage Range for VCOM Amplifier	1.5V to VBUFF-1.5V
Output Current Range for VCOM Amplifier	-100mA to 100mA
Input Voltage Range for GAMMA Amplifier	0V to VBUFF
Output Current Range for GAMMA Amplifier	-10mA to 10mA

Thermal Shutdown Circuit	Stops at 150°C
Package	QFN(PLP)0404-32