LXDC2HL28A-243 Murata

LXDC2HL series Micro DC-DC converter 1. Features 2 Low EMI noise and small footprint (5mm ) using inductor-embedded ferrite substrate High efficiency using synchronous rectifier technology at 3MHz operation PFM/PWM automatic mode switching function Smooth mode transition between PFM mode and PWM mode with low-ripple-voltage PFM mode 2% DC voltage accuracy over full load current range Wide input voltage range : 2.3~5.5V Maximum Load Current: 600mA (depends on output voltage) Fixed output voltage: 0.8V 4V (factory setting, 50mV step) Internal soft start, overcurrent protection 2. Description The LXDC2HL series is a low power step-down DC-DC converter suitable for space-limited or noise-sensitive applications. The device utilizes an inductor-embedded ferrite substrate that reduces radiated EMI noise and conduction noise. By adding input/output capacitors, it can be used as an LDO replacement. Its low noise and easy-to-assemble features assure reliable power supply quality. The device works in PFM mode at light load for extended battery life. At heavy load, it changes to PMW mode automatically and maintains high efficiency using synchronous rectifying technology. The device provides good output voltage accuracy even in PFM mode. It maintains 2% DC voltage accuracy over the full current range (0-600mA), and shows very smooth mode transition between PFM mode and PWM mode. 3. Typical Application Circuit LXDC2HL Enable EN Vout VBAT Vin Vout 1.8V/600mA GND 10uF 4.7uF 1 Dec 2014 X X X LXDC2HL series Micro DC-DC converter 4. Mechanical details 4-1 Outline Device&Trace 1 pin Mark Bottom View Top View a Code 1 2 b W 3 4 c c L IC Side View Capacitor T Substrate Unit: mm Mark Dimension L 2.5 +/- 0.2 W 2.0 +/- 0.2 T 1.1 MAX a 0.85 +/- 0.1 b 0.60 +/- 0.1 c 0.15 +/- 0.15 4-2. Pin Function Pin Symbol I/O Description 1 Vin Input Vin pin supplies current to the LXDC2HL internal regulator. This is the ON/OFF control pin of the device. Connecting this pin to GND keeps the device in shutdown mode. Pulling this pin to Vin enables the device with soft start. 2 EN Input This pin must not be left floating and must be terminated. If this pin is left open, the device may be off around 100mA output. EN=H: Device ON, EN=L: Device OFF Regulated voltage output pin. 3 Vout Output Apply output load between this pin and GND. 4 GND - Ground pin 2 Dec 2014