Step-Up DC-DC Converter

General Description

The kB2301 Series are PFM step-up DC-DC

converters with very low ripple noise due to the

high

operation

frequency.

The

maximum

operation frequency is 400KHz.

Only three components are required to realize the

conversion from the battery voltage to a selected

output voltage.

A driver pin (EXT) is provided for driving

external power transistor to extend the output

current capability where large current is required.

Enable pin (EN) is also provided so that the

circuit can be powered down.

Ordering Information

Package Type:

T: SOT-23-3

F: SOT-23-5

E: SOT-89

Output Voltage:

20: 2.0V

21: 2.1V

49: 4.9V

50: 5.0V

External switch

E: use external switch

L: use internal switch

Features

400KHz Maximum Operation Frequency

2.0V to 5.0V Output Voltage With 0.1V Step

Low Start-up Voltage: 0.8V at 1mA

2% Output Voltage Accuracy

Up to 88% Efficiency

Output current: 300mA at 2.5V input, 3.3V

output

Low Ripple and Low Noise

Output Current Extendable by External

Switch

Applications

Power source for applications where a higher

voltage than the battery voltage is required

One to three cell battery devices

Power source for cameras, camcorders,

VCRs,

PDAs,

pagers

and

hand

held

communication instrument

Typical Applications

KB2301

Kingbor Technology Co.,Ltd

TEL:(86)0755-26508846 FAX:(86)0755-26509052

1

KB