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0.9V startup, 1A True Shut-Off Synchronous Boost DC/DC converter

BL8541

DESCRIPTION

The BL8541, is a high-efficiency, synchronous step-

up switching regulators optimized for battery-

powered applications. It supports up to 1A load

current and allows the use of small, low cost

inductors and MLCC capacitors.

The BL8541 starts up as low as 0.9V input voltage

and it has true-shutoff function (shut off output to

zero voltage when CE pulled low) and real output

short-circuit protection. These features make it

ideal for USB interface power supply.

Given its high efficiency, the BL8541 device is ideal

for small portable applications powered by battery.

It consumes as low as 40uA (3V input /3.3V output)

at zero load. And its current consumption is less

than 1uA in shutdown mode.

BL8541 is available in DFN2x2-6 package.

FEATURES

 Capable of Delivering 1A

 High Efficiency: Up to 92%

 Compatible with MLCC capacitor

 1.8MHz Switching Frequency

 Low dropout 100% Duty operation

 0.6V Reference for Low Output voltages

 True Shutoff and Short-Circuit Protection

 Logic Control Shutdown (IQ<1uA)

 Thermal shutdown and UVLO

 Available in DFN2x2-6

APPLICATIONS

 MID / Tablet PC

 Portable Power Bank

 Smartphone OTG

 Toy

 Other portable device

TYPICAL APPLICATION

OFF ON

CE

GND

FB

LX

VOUT

4.7uF

LC3403

22uF

6.8uH

VIN

VOUT

1nF*

*Needed, when

Vout>=4.5V

VIN

PIN OUT & MARKING

CE

FB

VOUT

VIN

LX

GND

1

2

3

4

5

6

AL

YW

DFN2x2-6

Top View

AL: Product Code

YW: Date code (Year & Week)

BL8541