AP1601

Step-Up DC/DC Converter

Anachip Corp.

www.anachip.com.tw

Rev. 1.1 Apr. 14, 2005

4/9

Electrical Characteristics (Continued)

Symb

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Parameter

Conditions

Min.

Typ.

Max.

Unit

Operating Current into OUT

-

16

35

µA

Shutdown Current into OUT

SHDN

=GND

-

0.1

1

µA

-

90

-

Efficiency

-

85

-

%

LX Switch On-Time

3

4

7

µs

LX Switch Off-Time

0.8

1

1.2

µs

FB Input Current

-

0.03

50

nA

LBI Input Current

-

1

50

nA

CLSEL Input Current

AP1601, CLSEL=OUT

-

1.4

3

µA

SHDN Input Current

-

0.07

50

nA

LBO

Low Output Voltage

-

0.2

0.4

V

LBO

Off Leakage Current

-

0.07

1

µA

Damping Switch Resistance

-

88

150

Ω

-

-

SHDN Input Voltage

-

-

V

-

-

CLSEL Input Voltage

-

-

V

Note 1: Start-up voltage operation is guaranteed with the addition of a Schottky MBR0520 external diode between the input and output.

Note 2: Steady-state output current indicates that the device maintains output voltage regulation under load.

Typical Application Circuit

SHDN

LBO

LX

OUT

FB

REF

LBI

GND

0.1uF

Low- Battery

Detect OUT

22uH

220uF

+

100uF

+

V

IN

ON

OFF

Adj Output (1.8V to 4.0V)

up to 300 mA

Low- Battery

Detect In

R5

R6

Vout=1.2 (1+

)

R6

R5

R6 Suggest 100K~200K

FB=Vout, Vout=3.3V

FB=GND, Vout=5V

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