BL8531 Datasheet, PDF (1/10 Pages) SHANGHAI BELLING CO., LTD. – High Efficiency Low Noise PFM Step-up DC-DC Converter

BL8531
DESCRIPTION
High Efficiency Low Noise PFM Step-up DC/DC Converter
FEATURES
BL8531 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
5.5uA. All of these features make BL8531 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, BL8531 is well considerate in circuit
design and manufacture, so that the interferer to
other circuits by the device is reduced greatly.
BL8531 integrates stable reference circuits and
trimming technology, so it can afford high
precision and low temperature-drift coefficient of
the output voltage.
BL8531 is available in SOT-89-3, SOT-23-3, SOT-
23-5 and TO-92 packages, which is 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.
• 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～
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
• High power conversion efficiency-----85％
• Low quiescent current drawn from power
source-------------------------------------<5.5uA
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
BL8531
ELECTRICAL CHARACTERISTICS
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
0
Output Voltage VS. Output Current
(Vout=3.3V)
Vin=0.9V
Vin=1.0V
Vin=1.2V
Vin=1.5V
Vin=1.8V
Vin=2.0V
Vin=2.5V
0.1
0.2
0.3
0.4
0.5
Iout (A)
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