Datasheet

5V/2.1A 150KHz 45V Buck DC to DC Converter For USB Interface

XL2011

Rev 1.0

www.xlsemi.com

2

Pin Configurations

Figure2. Pin Configuration of XL2011 (Top View)

Table 1 Pin Description

Pin Number

Pin Name

Description

1

FB

Feedback Pin (FB). The feedback threshold voltage is 5V.

2

NC

No Connected.

3

VC

Internal Voltage Regulator Bypass Capacity. In typical system

application, The VC pin connect a 1uf capacity to VIN.

4

VIN

Supply Voltage Input Pin. XL2011 operates from 8V to 45V

DC voltage. Bypass Vin to GND with a suitably large

capacitor to eliminate noise on the input.

5,6

SW

Power Switch Output Pin (SW). SW is the switch node that

supplies power to the output.

7,8

GND

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 XL2011.