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AP1580

PWM CONTROL 3A STEP-DOWN CONVERTER

Diodes Incorporated. 

NOT RECOMMENDED FOR NEW

DESIGN, USE AP5004

AP1580

PWM CONTROL 3A STEP-DOWN CONVERTER

Absolute Maximum Ratings

Symbol

Parameter

Rating

Unit

VCC

VFB

VEN

Vboost

VOUTPUT

Top

TST

VCC Pin Voltage

VOUT Pin Voltage

EN Pin Voltage

Vboost Pin Voltage

Switch Pin Voltage

Operating Junction Temperature Range

Storage Temperature Range

VSS - 0.3 to VSS + 45

V

VSS - 0.3 to VCC

V

VSS - 0.3 to VCC + 0.3

V

VOUTPUT + 5V

V

VSS - 0.3 to VCC + 0.3

V

-25 to +125

oC

-40 to +150

oC

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

VIN

IOUT

TA

Parameter

Input Voltage

Output Current

Operating Ambient Temperature

Min

Max

Unit

10

40

V

0

3

A

-25

85

oC

Electrical Characteristics (VIN = 12V, TA=25°C, unless otherwise specified)

Symbol

Parameter

Conditions

VFB

VIN

ISTBY

∆VOUT/VOUT

∆VOUT/VOUT

fOSC

fOSC1

DC

VIH

VIL

ISH

ISL

RDS(ON)

ILIMIT

η

θJA

θJC

Feedback Voltage

Input Voltage

Standby Current

Line Regulation

Load Regulation

Oscillation Frequency

Frequency of Current Limit or

Short Circuit Protect

Maximum Duty Cycle

Minimum Duty Cycle

EN Pin Logic Input Threshold

Voltage

EN Pin Input Leakage Current

Internal MOSFET RDS(ON)

Current Limit

Efficiency

Thermal Resistance

Junction-to-Ambient (Note 4)

Thermal Resistance

Junction-to-Case (Note 4)

VEN =0V

VIN = 10V~40V

IOUT = 0.1 to 3A

Measure waveform at SW pin

Measure waveform at SW pin

VFB =0.5V

VFB =1.0V

Regulator ON

Regulator OFF

VIN = 12V, VOUT = 5V, IOUT = 3A

Min.

0.780

10

-

-

-

240

-

-

-

2.0

--

-

-

-

4

-

-

-

Typ.

0.8

-

-

±1.0

±0.8

300

30

90

0

-

-

20

-10

80

4.5

90

149

Max. Unit

0.820 V

40 V

2 µA

±1.5 %

±1 %

360 KHz

- KHz

-

%

-

%

-

0.8

V

- µA

- µA

120 mΩ

-

A

-

%

- oC/W

13.4

- oC/W

Notes:

3. The PCB layout copper area should be much greater than 10*10mm at the Vcc pins (5&6) of the AP1580, if you need large PD or low Tc&TA.

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

4. Devices mounted on 2oz copper, minimum recommended pad layout, FR-4 PCB.

AP1580 Rev. 2

3 of 9

www.diodes.com

July 2008

© Diodes Incorporated

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