ACE705

High efficiency, multi-funtion step-up

DC/DC Controller

VER 1.2

4

Input Current * (no

load)

Lin

Iout=0mA, Vin=Vout*0.6

20

25

uA

Quiescent current *

No external component,

Vout=Voutx1.05

6

8

uA

Chip leakage current

1

uA

CE “H: threshold

voltage

0.6

0.9

V

CE “L” threshold

voltage

0.3

0.6

V

Oscillator frequency

Vout=Vout*0.96 Test EXT pin

frequency

300

350

400

Khz

CE ”H”

-0.5

0

0.5

uA

CE “L”

-0.5

0

0.5

uA

3.0V<=Vout<=3.9V

-21

-35

EXT “H” output current

-41

mA

3.0V<=Vout<=3.9V

23

25

EXT “H” output current

31

mA

Oscillator duty cycle

Duty

On(Vlx “L”) side

70

75

80

%

Efficiency

η

90

%

Note :

1.

Diode: Schottky type, such as: 1N5817, 1N5819, 1N5822

2.

Inductor: 27uH(R<0.5Ω)

3.

Output Capacitor: 100uF (Tantalum type)

4.

Vout pin filter capacitor: 1nF (Ceramic type)

5.

Input capacitor: 47uF

Typical Application

(1) Application with external NMOSFET

Vin

D 1N5817

Vout

L 27uH

EXT

OUT

Cin

ACE705

47uF

Cout

Rload

CE

GND

Cp

100uF Tan

OFF ON

1nF

Fig2