LM2753 Overview
The LM2753 is capable of driving a flash LED with a pulsed current of 400 mA at an input voltage of 3.6 V. A switched-capacitor doubler, the LM2753 provides a regulated 5-V output (VOUT) over an input supply range of 3 V to 5.5 V. The switched output, IOUT, takes less than 10 ns to turn on and provide maximum current to a flash LED. Flash LED current is set via a ballast resistor. Continuous illumination current (torch mode) is programmed by connecting a resistor between IOUT and VOUT. This device uses only three small, low-cost ceramic capacitors. TORCH FLASH (Need TORCH ³21´ WR )/$6+) VIN 2 1 C1+ VOUT VOUT = 5 V 9 RTORCH COUT 3 C16 EN LM2753 4 FLASH IOUT 8 RFLASH 5 Flash LED Copyright © 2016, Texas Instruments Incorporated 1 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical
LM2753 Key Features
- 1 Input Voltage Range: 3 V to 5.5 V
- Regulated 5-V Output
- 250-mA Output Current With a 3.6-V Input
- 400-mA Pulsed Output Current
- 60-µA (Typical) Quiescent Current
- Pulse-Frequency Modulation (PFM) Regulation
- Inductor-Less Solution: Requires Only Three
- < 1-µA Typical Shutdown Current
- 10-pin WSON Package (No Pullback)
- 3 mm × 3 mm × 0.8 mm
