KB3301 Datasheet, PDF (1/5 Pages) Kingbor Technology Co – Step-up DC/DC converter

KB3301
Step-up DC/DC converter
General Description
The KB3301 is a small, high efficiency, and low voltage
step-up DC/DC converter with an Adaptive Current Mode
PWM control loop, includes an error amplifier, ramp
generator, comparator, switch pass element and driver
in which providing a stable and high efficient operation
over a wide range of load currents. It operates in stable
waveforms without external compensation.
The low start-up input voltage below 0.8V makes KB3301
suitable for 1 to 4 battery cells applications of providing
up to 300mA output current. The 500KHz high switching
rate minimized the size of external components. Besides,
the 14µA low quiescent current together with high effic-
iency maintains long battery lifetime.
The KB3301 is available in small package SOT-26 and
SOT89-5
Applications
ƹ LCD Panel
ƹ DSC
ƹ MP3
ƹ Wireless Equipment
ƹ Portable Instrument
ƹ PDA
Features
ƹ 90% Efficiency
ƹ High Supply Capability to Deliver 5.0V 500mA
with input 3.6V-4.2V
ƹ 14µA Quiescent (switch-off) Supply Current
ƹ 500KHz Fixed Switching Frequency
ƹ Zero Shutdown Mode Supply Current
ƹ Providing Flexibility for Using Internal and
External Power Switches
ƹ 1.0V Low Start-up Input Voltage
ƹ Small SOT-26 & SOT89-5 Package
䂓 Ordering Information
Item
Package Shipping
KB3301MR
SOT-26
3000pcs/Reel&Tape
KB3301PR
SOT-89-5 3000pcs/Reel&Tape
䂓 Package Information
Typical Application Circuit
L1
D1
Vin
+
3.3~10uH
C3
1N5819
100uF
C2
1uF
VDD
CE
LX
KB3301
EXT
FB
GND
Vout
R1
3.3V/5V
1.6M/100K
+
C1
R2
100uF
980k/33K
SOT89-5
SOT-26
䂓 Pin Configurations
SOT-26
1
2
3
4
5
6
SOT-89-5 Pin NamePin Function
1
CE Chip enable
EXT Output
5
GND Ground
4
LX Switching
2
VDD Input
3
FB Feedback input 1.25V
Note:Vin=3.6~4.2V, Vout=5.0V 500mA ( USB host application )
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