AP1515

150KHz, 1.5A PWM Buck DC/DC Converter

Anachip Corp.

www.anachip.com.tw

Rev.1.0 Oct 29, 2004

3/6

Absolute Maximum Ratings

Symbol

Parameter

Rating

Unit

Supply Voltage

+24

V

ON/OFF Pin input voltage

-0.3 to +18

V

Feedback Pin voltage

-0.3 to +18

V

Output voltage to Ground

-1

V

Power dissipation

Internally limited

W

Storage temperature

-65 to +150

Operating temperature

-40 to +125

Operating voltage

+4.5 to +22

V

Electrical Characteristics (All Output Voltage Versions)

Symbol

Parameter

Conditions

Min.

Typ.

Max.

Unit

-50

Feedback bias current

(Adjustable version only)

-

-10

-100

nA

127

150

173

Oscillator frequency

110

-

173

KHz

Oscillator frequency of

short circuit protect

When current limit occurred

5

15

25

KHz

1.4

Saturation voltage

No outside circuit

-

1.25

1.5

V

Max. Duty Cycle (ON)

-

100

-

DC

Min. Duty Cycle (OFF)

-

0

-

%

Current limit

Peak current

No outside circuit

2

-

-

A

Output = 0

No outside circuit

-

-

-200

uA

Output = -1

Output

leakage

current

-

-5

mA

Quiescent Current

-

5

10

mA

150

Standby Quiescent

Current

ON/OFF pin=5V

-

70

200

uA

Thermal Resistance

Junction to case

-

30

-

Note 1

Junction to ambient

-

100

-

Part Number

Symbol

Parameter

Conditions

Typ.

Limit

Unit

FB

V

Output

Feedback

1.23

1.193/1.18

1.267/1.28

V

AP1515-ADJ

η

Efficiency

78

%

OUT

V

Output voltage

3.3

3.168/3.135

3.432/3.465

V

AP1515-3.3V

η

Efficiency

80

%

Note 1: Pin 4(GND) (< 1 mm length) & direct connect to internal GND layer.