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Datasheet 5V/2.4A 150KHz 40V Buck DC to DC Converter For USB Interface Features
n n n n n n n n n n n Wide 8V to 40V input voltage range. Fixed 5V output voltage. Maximum 2.4A output current. Fixed 150KHz switching frequency. Internal optimize power MOSFET. High efficiency up to 92%. Built in output short shutdown function. Excellent line and load regulation. Built in thermal shutdown function. Built in current limit function. Available in SOIC-8 package.
XL2012
General Description
The XL2012 is a 150 KHz fixed frequency PWM buck (step-down) DC/DC converter, capable of driving a 2.4A load with high efficiency, low ripple and excellent line and load regulation. Requiring a minimum number of external components, the regulator is simple to use and include internal frequency compensation and a fixed-frequency oscillator. The XL2012 built in output short protection function. When short protection function happens, the chip will be shutdown. An internal compensation block is built in to minimize external component count.
Applications
n n n Car Charger. Battery Charger. USB Power Supply.
Figure1. Package Type of XL2012
Rev 1.0 1
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Datasheet 5V/2.4A 150KHz 40V Buck DC to DC Converter For USB Interface Pin Configurations XL2012
Figure2. Pin Configuration of XL2012 (Top View) Table 1 Pin Description Pin Number 1 2 3 4 5,6 7,8 Pin Name FB NC VC VIN SW GND Description Feedback Pin (FB). The feedback threshold voltage is 5V. No Connected. Internal Voltage Regulator Bypass Capacity. In typical system application, The VC pin connect a 1uf capacity to VIN. Supply Voltage Input Pin. XL2012 operates from 8V to 40V DC voltage. Bypass Vin to GND with a suitably large capacitor to eliminate noise on the input. Power Switch Output Pin (SW). SW is the switch node that supplies power to the output. Ground Pin. Care must be taken in layout. This pin should be placed outside of the schottky diode to output capacitor ground path to prevent switching current spikes from inducing voltage noise into XL2012.
Rev 1.0 2
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Datasheet 5V/2.4A 150KHz 40V Buck DC to DC Converter For USB Interface Function Block XL2012
Figure3. Function Block Diagram of XL2012
Typical Application Circuit
Figure4. XL2012 Typical Application Circuit (VIN=8V~40V, VOUT=5V/2.4A)
Rev 1.0 3
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Datasheet 5V/2.4A 150KHz 40V Buck DC to DC Converter For USB Interface Ordering Information
Temperature Range Part Number Lead Free XL2012E1 Marking ID Lead Free XL2012E1 Packing Type 2500 Units on Tape & Reel
XL2012
Package
XLSEMI Pb-free products, as designated with “ E1” suffix in the par number, are RoHS compliant.
Absolute Maximum Ratings(Note1)
Parameter Input Voltage Feedback Pin Voltage Output Switch Pin Voltage Power Dissipation Thermal Resistance (SOP8L) (Junction to Ambient, No Heatsink, Free Air) Operating Junction Temperature Storage Temperature Lead Temperature (Soldering, 10 sec) ESD (HBM) Symbol Vin VFB VOutput PD RJA TJ TSTG TLEAD Value -0.3 to.