XL2001 中文规格书

5V/1.8A 150KHz 45V Buck DC to DC Converter For USB Interface XL2001

Features

Wide 8V to 45V input voltage range. Fixed 5V output voltage.

Maximum 1.8A 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 SOP8L package.

Applications

Car Charger. Battery Charger. USB Power Supply.

General Description

The XL2001 is a 150 KHz fixed frequency PWM buck (step-down) DC/DC converter, capable of driving a 1.8A 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 XL2001 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.

Figure1. Package Type of XL2001

5V/1.8A 150KHz 45V Buck DC to DC Converter For USB Interface XL2001

5V/1.8A 150KHz 45V Buck DC to DC Converter For USB Interface XL2001

Figure4. XL2001Typical Application Circuit (VIN=8V~45V, VOUT=5V/1.8A)

5V/1.8A 150KHz 45V Buck DC to DC Converter For USB Interface XL2001

5V/1.8A 150KHz 45V Buck DC to DC Converter For USB Interface XL2001

5V/1.8A 150KHz 45V Buck DC to DC Converter For USB Interface XL2001

Figure5. XL2001System Parameters Test Circuit (VIN=8V~45V, VOUT=5V/1.8A)

5V/1.8A 150KHz 45V Buck DC to DC Converter For USB Interface XL2001

5V/1.8A 150KHz 45V Buck DC to DC Converter For USB Interface XL2001

Output short shutdown function description

The output short shutdown function is built in XL2001. The short protection circuit monitors the output voltage, whenever FB pin voltage is below 1.5V, the short circuit protection circuit is triggered, the converter will be shutdown, input current less than 5mA.

When the short fault is removed ，if output load is floating, then converter will restart up, the output voltage will return to normal; if output load isn’t floating, then converter must be power reset , the output voltage will comeback.

Figure8. The converter will be shutdown when output short happen.

8

101214161820222426283032343638404244

1.0

1.11.21.31.41.51.61.7

1.81.9

2.0

Input current VS Input voltage

I n p u t c u r r e n t (m A )

Input voltage(V)

Figure9. The input current curve when output short happen.

VOUT

Swithing

5V/1.8A 150KHz 45V Buck DC to DC Converter For USB Interface XL2001

Package Information

SOP8 Package Mechanical Dimensions