AP1580

PWM CONTROL 3A STEP-DOWN CONVERTER

AP1580 Rev. 1

3 of 9

JANUARY 2007

www.diodes.com

Absolute Maximum Ratings

Symbol

Parameter

Rating

Unit

V

V

EN Pin Voltage

V

V

Switch Pin Voltage

V

Top

Operating Junction Temperature Range

-25 to +125

Storage Temperature Range

-40 to +150

Caution:

The absolute maximum ratings are rated values exceeding which the product could suffer physical damage. These values must therefore not

be exceeded under any conditions.

Recommended Operating Conditions

Symbol

Parameter

Min

Max

Unit

Input Voltage

10

40

V

Output Current

0

3

A

Operating Ambient Temperature

-25

85

Symbol

Parameter

Conditions

Min.

Typ.

Max.

Unit

Feedback Voltage

0.780

0.8

0.820

V

Input Voltage

10

-

40

V

Standby Current

-

-

2

µA

-

±

1.0

±

1.5

%

-

±

0.8

±

1

%

Oscillation Frequency

Measure waveform at SW pin

240

300

360

KHz

Frequency of Current Limit or

Short Circuit Protect

Measure waveform at SW pin

-

30

-

KHz

Maximum Duty Cycle

-

90

-

%

DC

Minimum Duty Cycle

-

0

-

%

Regulator ON

2.0

-

-

EN Pin Logic Input Threshold

Voltage

Regulator OFF

--

-

0.8

V

-

20

-

µA

EN Pin Input Leakage Current

-

-10

-

µA

-

80

120

mΩ

Current Limit

4

4.5

-

A

η

Efficiency

-

90

-

%

Thermal Resistance

Junction-to-Ambient (Note 4)

-

149

-

Thermal Resistance

Junction-to-Case (Note 4)

-

13.4

-

Note:

3.

The dual Vcc pins (5&6) on the SOP-8L package are internally connected.