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KB3302 fiches techniques PDF

Kingbor Technology - 2MHz Step-up Switching regulator

Numéro de référence KB3302
Description 2MHz Step-up Switching regulator
Fabricant Kingbor Technology 
Logo Kingbor Technology 





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KB3302 fiche technique
Kingbor Technology Co.,Ltd
TEL:(86)0755-26508846 FAX:(86)0755-26509052
KB3302
2Amp, 2MHz Step-up Switching
regulator with Soft-Start
FEATURES
Up to 95% Efficiency
TDB uA No Load Current
www.DataSheet4U.com
1000mA Output Current
1.5V to 16V Input Voltage Range
Programmable switching frequency up to 2MHz
Output voltage up to 32V
Constant switching frequency current-mode control
1.23V Reference Allows Low Output Voltages
Shutdown Mode Draws ) 10 µA Supply Current
Low saturation voltage switch: 220mV at 2A
Overtemperature Protected,Soft-Start function
8-Pin MSOP Packages
DESCRIPTION
The KB3302 is a high-frequency current-mode step-up
switching regulator with an integrated 2A power transis-
tor. Its high switching frequency (programmable up to
2MHz) allows the use of tiny surface-mount external pas-
sive components. Programmable soft-start eliminates high
inrush current during start-up. The internal switch is rated
at 32V making the converter suitable for high voltage ap-
plications such as Boost, SEPIC and Flyback.
The operating frequency of the KB3302 can be set with an
external resistor. The ability to set the operating frequency
gives the KB3302 design flexibilities. A dedicated COMP
pin allows optimization of the loop response. The KB3302
is available in thermally enhanced 8-Pin MSOP packages.
APPLICATIONS
Flat screen LCD bias supplies
TFT bias supplies
XDSL power supplies
Medical equipment
Digital video cameras
Portables devices
White LED power supplies
TYPICAL APPLICATION
VIN = 3.3V
TO 4.2V
L1
3.3µH

C1
4.7µF

6
VIN
3 SHDN KB3302
7 SS MSOP8
1N5819
5
SW
FB 2
COMP 1
100nF
GND
4
ROSC
8
R3
10.7k
R3
17.4k
1nF
R1
300k
R2
100k
VOUT
5.0V
1000mA
C3
22 µF
L1: Sumida CR43
Figure 1. 1.2MHzAll Ceramic Capacitor Single Li-ion Cell
to 5V Boost Converter.
KB3302 Efficiency
95
VOUT = 5V
90
1.2MHz
85
80
VIN = 4.2V
75
70
65
60
VIN = 3.6V
55
VIN = 2.6V
50
0.001
0.010
0.100
Load Current (A)
1.000
1

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