ACE701

PFM STEP-UP DC/DC Converter with High Efficiency and Low Noise

VER 1.5

4

Electrical Characteristics

Parameter

Symbol

Test Conditions

Min

Typ

Max

Unit

Output Voltage

Vout

2.45

2.5

2.55

V

2.646

2.7

2.754

2.94

3.0

3.06

3.234

3.3

3.366

3.528

3.6

3.672

3.92

4.0

4.08

4.9

5.0

5.1

5.88

6.0

6.12

Input Voltage

Vin

12

V

Input Current

Lin

Iout=0mA, Vin=Vout*0.6

12

15

uA

Start-up voltage

Vstart

Iout=1mA, Vin:02V

0.8

0.9

V

Hold-on voltage

Vhold

Iout=1mA, Vin:20V

0.6

0.7

V

Quiescent current drawn from

power source

Without external components,

Vout=Vout x 1.05

4

7

uA

Switch ON Resistance

Rswon

0.4

0.5

Ω

LX leakage current

Vout=Vlx=6V

0.5

5

uA

CE “H” threshold voltage

0.6

0.9

V

CE “L” threshold voltage

0.3

0.6

V

Oscillator frequency

LX on “L” side Vout=Vout * 0.96

300

350

400

Khz

Oscillator duty cycle

Maxdty

On (Vlx “L”) side

70

75

80

%

Efficiency

η

85

%

Note :

1.

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

2.

Inductor: 27uH(R<0.5Ω)

3.

Capacitor: 100uF (Tantalum type)

Typical Application Circuit

D 1N5819

Vin

Vout

L

27uH

LX

LX

OUT

Iout

Cin 47uF

ACE701

GND

Cout

Rload

100uF

Tan