1FEATURES
2· 2.7 V to 6.0 V Input Voltage Range
· 1´ and 1.5´ Charge Pump
· Auto Switching Between 1´ and 1.5´ Modes
· 750 kHz Charge Pump Frequency
· Seven Individually-regulated WLED
Current Sinks
· Single- Wire Interface for Dimming and
ON/OFF Control
· 25 mA max LED Current for Six Current Sinks
· One 80 mA Current Sink
· Open WLED Detection
· Built-in Soft Start and Current Limit
· 16-pin, 3 mm ´ 3 mm QFN Package

APPLICATIONS
· Cellular Phones
· Portable Navigation Displays
· Multi-display Handheld Devices

DESCRIPTION
The TPS60255 is a high-efficiency, constant frequency charge pump DC/DC converter that uses
1´ and 1.5´ conversion to maximize efficiency for the
input voltage range. By using adaptive 1´/1.5´
charge-pump modes and very low dropout current
regulators, the TPS60255 achieves high efficiency for
the entire one-cell lithium battery range. The protection features include soft start, over-current
limit, thermal shut down, and over-voltage detection.
The device automatically detects and removes
unused current sinks from the control loop.
This device drives six 25 mA current sinks and one
80 mA current sink. These current regulators are programmed by three independent brightness
registers and five ON/OFF bits using a single-wire
interface (EasyScale™). This offers flexible
applications for a variety of lighting control in portable
devices.