SMD Type
PFM Step-up DC/DC Converter With
High Efficiency And Low Noise
KX8530
Outline
The KX8530 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 7uA. All of
these features make KX8530 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, KX8530 is well considerated in circuit
design and manufacture. So that the interferer to
other circuits by the device is reduced greatly.
KX8530 integrates stable reference circuits and
trimming technology, so it can afford high precision
and low temperature-drift coefficient of the output
voltage.
KX8530 is available in SOT-89
SOT-23 and
IC
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
The converter 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-----------------------------------------
7ìA
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
SOT-153 packages which is PB free. And in 5-pin
packages, such as SOT-153, the device can be
switch on or off easily by CE pin, to minimize the
standby supply current.
PIN Configuration
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SMD Type
KX8530
Block Diagram
IC
Absolute Maximum Ratings
Input voltage range-----------------------------------------------------------------------------------0.3V 12V
Input voltage: Vi(LX) ---------------------------------------------------------------------------------0.3V (Vout +0.3)
CE pin voltage-----------------------------------------------------------------------------------------0.3V (Vout +0.3)
Lx pin output current ---------------------------------------------------------------------------------0.7A
Maximum power dissipation, Pd T=25
SOT-89----------------------------------------------------------------------------------------------0.5W
SOT-153--------------------------------------------------------------------------------------------0.15W
SOT-23----------------------------------------------------------------------------------------------0.15W
Maximum junction temperature ---------------------------------------------------------------------150
Operating free-air temperature range ---------------------------------------------------------
-20
+80
Storage temperature range ---------------------------------------------------------------------- -40 125
Lead temperature and time -------------------------------------------------------------------------260 ,10S
Recommended Operating Conditions
Parameter
Input voltage range
Inductor
Input capacitor
Output capacitor
Operating junction temperature
Min
0.8
10
0
47
-20
27
10
100
220
85
Nom
Max
V
out
100
Unit
V
ìH
ìF
ìF
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