BL8534
High Efficiency Low Noise PFM Step-up DC/DC Converter
DESCRIPTION
BL8534 series are CMOS-based PFM step-
up DC-DC Converter. The converter can start
up by supply voltage as low as 0.8V, and
capable of delivering maximum 200mA output
current at 3.3V output with 1.8V input Voltage.
Quiescent current drawn from power source
is as low as 20uA. All of these features make
BL8534 series be suitable for the portable
devices, which are supplied by a single
battery to four-cell batteries.
To reduce the noise caused by the switch
regulator, BL8534 is well considerated in
circuit design and manufacture. So that the
interferer to other circuits by the device is
reduced greatly.
BL8534 integrates stable reference circuits
and trimming technology, so it can afford high
precision and low temperature-drift coefficient
of the output voltage.
BL8534 is available in SOT-89-3, SOT-23-3,
SOT-23-5 and TO-92 packages that are PB
free. And in 5-pin packages, such as SOT-23-
5, the device can be switch on or off easily by
CE pin, to minimize the standby supply
current.
FEATURES
•
•
•
•
•
•
•
Deliver 200mA at 3.3V Output voltage
with 1.8V input Voltage
Low start-up voltage (when the output
current is 1mA)-----------------------------0.8V
Output voltage can be adjusted from 2.5V
to 6.0V (In 0.1V step)
Output voltage accuracy ---------------±2％
Low temperature-drift coefficient of the
output voltage--------------------±100ppm/℃
Only three external components are
necessary: An inductor, a Schottky diode
and an output filter capacitor
Low quiescent current drawn from power
source-------------------------------------<20uA
APPLICATIONS
•
•
•
Power Source for PDA, DSC, MP3 Player,
Electronic toy and wireless mouse
Power Source for a Single or Dual-cell
Battery-Powered Equipments
Power Source for LED
TYPICAL APPLICATION
ELECTRICAL CHARACTERISTICS
LC3000CC3TR33
BL8534
4
Output Voltage(V)
3
2
1
0
0
200
400
600
Output Current(mA)
800
BL8534
VIN=1.2V
VIN=1.5V
VIN=2V
VIN=2.5V
VIN=3V
www.belling.com.cn
1
BELLING [ SHANGHAI BELLING CO., LTD. ]
