Charge Pump Controller with Automatic Mode Transition

RT9397BF

The RT9397BF is a highly integrated step-up charge pump and inverting charge pump to generate positive and negative output voltage. The output voltages can be adjusted from ±4.5V to ±6V through external feedback resistors.

The part maintains highest efficiency by utilizing a x1.33/x1.5/x1.75/x2 mode fractional charge pump with automatic mode transition.

The RT9397BF is available in a WQFN-20L 3x3 package to achieve optimized solution for PCB space.

Applications

TFT-LCD Smart Phone Display

Key Spec.

	RT9397B
Status	Active
Vin (min) (V)	2.7
Vin (max) (V)	4.5
Number of Buck Converters	0
Number of Boost Converters	0
Number of Negative Outputs	1
Application	LCD Bias
Features	Enable Input;OVP;SCP;UVP
Package Type	WQFN3x3-20

Features

2.7V to 4.5V Supply Voltage Range
Over 80% Average Efficiency of Battery Life
Support up to 50mA Output Current
Low 1μA Shutdown Current
Internal Soft-start Function
Short Circuit Protection Function
Over-Voltage Protection Function
Over-Temperature Protection Function
Charge Pump Controller with Automatic Mode Transition
Adaptive x1.33/x1.5/x1.75/x2 Charge Pump Mode Transition for Positive Voltage and x-1 for Negative Voltage
Low Input Noise and EMI
Output with Fast Discharge when IC shutdown
Adjustable Output Voltage Through External Feedback Resistor
Available in 20-Lead WQFN Package

Datasheet

DS9397BF-00.pdf

Datasheet

DS9397BF-00.pdf