TPS61140

(1) 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 under recommended operating conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2) All voltage values are with respect to network ground terminal.

The TPS61140/1 is a dual output boost converter IC.It is intended to be configured as a highly integrated power solution providing regulated voltage and current output with one boost converter. This TPS61140  is ideal for driving the OLED sub display and WLED  backlight for the LCD main display in clam shell  phones. The voltage and current can be individually programmed through external resistors. There is a dedicated selection pin for each output, so the two  outputs can be turned on separately or  simultaneously. When only the voltage output is enabled, the boost converter TPS61140 is controlled by pulse  frequency modulation (PFM) in order to achieve high  efficiency over a wide load range. If the current output is selected, the device adopts a 1.2 MHz pulse width  modulation control (PWM) method in order to maximize output current. Applying an external PWM  signal to the select pin (SELI) of TPS61140 reduces the output current thereby allowing WLED dimming.

The TPS61140/1 has a built-in power MOSFET and power diode; thereby, eliminating the needs for any external active power components. In addition, the high switching frequency reduces the external inductor and capacitor sizes. Overall, the IC TPS61140 provides a highly compact solution with high efficiency and plenty of flexibility.