GMT G2138N51U DC-DC POWER IC

General Description  

The G2138 is a high-performance step-up charge  pump and inverter to generate two output voltages, it  is including pumping controllers for positive and negative output voltage. The following content contains the  detailed description and the information of component  selection.  The positive charge-pump controller provides adjustable regulated output AVDD and fixed -1 ratio of AVEE  to supply the TFT.  The pumping clock can be generated by internal circuit,  to reduce the control signal from driver IC. Or the  charge and pump state can be synchronized with LCD  display TE signal (PSYNC), it can reduce the interference to display quality when states change.  The device requires only five (12 pins) small and  low-cost ceramic capacitors is available in  UDFN1.5X2.4-12 package for smart phone LCD  panel’s driver IC.

Features  

•  Charge pump x2 mode for positive AVDD and  x-1 mode for negative AVEE  

• 2.5V to 4.8V input supply voltage range  

• AVDD output range：5.8V to 6.0V  

• AVEE output range：-5.8V to -6.0V 

•  Charge pump clock synchronized with PSYNC  for benefit of low noise  

• Positive and Negative regulated charge Pump  with Diode free  

• External Capacitor 5C or 7C only  

• UDFN1.5X2.4-12 (1.5mm * 2.4mm * 0.5 mm)  package is available  

• Control signals voltage 1.65V to 4.8V 

  
  

  Applications  

• TFT LCD POWER IC