BL8541 Datasheet, PDF (1/6 Pages) SHANGHAI BELLING CO., LTD. – 0.9V startup, 1A True Shut-Off Synchronous Boost DC-DC converter

BL8541
0.9V startup, 1A True Shut-Off Synchronous Boost DC/DC converter
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
VIN
4.7uF
OFF _ON
6.8uH
*Needed, when
Vout>=4.5V
1nF*
LX
VIN
VOUT
L^BC^L83⁵4⁴¹03
CE
FB
GND
VOUT
22uF
PIN OUT & MARKING
1 CE
2 FB
3 VOUT
AL
YW
VIN 6
LX 5
GND 4
DFN2x2-6
Top View
AL: Product Code
YW: Date code (Year & Week)
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