LXDC2HN25A-134 Murata

LXDC2HN typeA 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 transient 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 LXDC2HN series is a low power step-down DC-DC converter, which is suitable for a space-limited or a noise-sensitive application. The device utilizes an inductor-embedded ferrite substrate, and the substrate eliminates radiated EMI noise and conduction noise efficiently. By just putting input/output capacitors, it can be used as a LDO replacement. Its low noise feature and easy to assembly feature assures reliable power supply quality. The device works in PFM mode at light load and it extends the battery life. At heavy load, its control mode changes to PMW mode automatically and it keeps high efficiency using synchronous rectifying technology. The device keeps good output voltage accuracy even in PFM mode. It keeps 2% DC voltage accuracy over full current range (0-600mA), and shows very smooth mode transient between PFM mode and PWM mode. LXDC2HN series has resin top coast to make it easy to be picked up in factory assembly. 3. Typical Application Circuit 1 Dec 2014 LXDC2HN typeA series Micro DC-DC converter 4. Mechanical details 4-1 Outline Device &Trace 1 pin Mark Bottom View a Top View Code 1 2 b X X W X X X 3 4 c c L Resin Side View T Substrate Unit: mm Mark Dimension L 2.5 +/- 0.2 W 2.0 +/- 0.2 T 1.2 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 LXDC2HN 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