AP1509

Document number: DS31016 Rev. 6 - 2

5 of 12

www.diodes.com

February 2020

© Diodes Incorporated

AP1509

Electrical Characteristics

Unless otherwise specified, VIN = 12V for 3.3V, 5V, adjustable version, and VIN = 18V for the 12V version. ILOAD = 0.5A

Specifications with boldface type are for full operating temperature range, the other type are for TJ = 25°C.

Symbol

Parameter

Conditions

Min

Typ.

Max

Unit

IFB

Feedback Bias Current

VFB = 1.3V

(Adjustable Version Only)

—

-10

-50

nA

-100

FOSC

Oscillator Frequency

—

127

150

173

kHz

110

173

FSCP

Oscillator Frequency of Short Circuit

Protect

When Current Limit Occurred and

VFB < 0.5V, Ta = 25°C

10

30

50

kHz

VSAT

Saturation Voltage

IOUT = 2A

No Outside Circuit

VFB = 0V Force Driver On

—

1.25

1.4

V

1.5

DC

Max. Duty Cycle (ON)

VFB = 0V Force Driver On

—

100

—

%

Min. Duty Cycle (OFF)

VFB = 12V Force Driver Off

—

0

—

ICL

Current Limit

Peak Current

No Outside Circuit

VFB = 0V Force Driver On

3

—

—

A

IL

Output = 0

Output Leakage Current

No Outside Circuit

VFB = 12V Force Driver Off

—

—

-200

µA

Output = -1

VIN = 22V

—

-5

mA

IQ

Quiescent Current

VFB = 12V Force Driver Off

—

5

10

mA

ISTBY

Standby Quiescent Current

ON/OFF pin = 5V

VIN = 22V

—

70

150

µA

200

VIL

ON/OFF Pin Logic Input Threshold

Voltage

Low (Regulator ON)

—

1.3

0.6

V

VIH

High (Regulator OFF)

2.0

—

IH

ON/OFF Pin Logic Input Current

VLOGIC = 2.5V (OFF)

—

—

-0.01

µA

IL

ON/OFF Pin Input Current

VLOGIC = 0.5V (ON)

—

-0.1

-1

ϴJA

Thermal Resistance

SO-8

Junction to Case

—

15

—

°C/W

ϴJC

Thermal Resistance

with a Copper Area of Approximately

3in2

SO-8

Junction to Ambient

—

70

—

°C/W

AP1509 - ADJ

VFB

Output

Feedback

4.5V < VIN < 22V

0.2A < ILOAD < 2A

VOUT Programmed for 3V

1.193

1.18

1.23

1.267

1.28

V

Ƞ

Efficiency

VIN = 12V, ILOAD=2A

76

76

—

%

AP1509 - 3.3V

VOUT

Output Voltage

4.75V < VIN < 22V

0.2A < ILOAD < 2A

3.168

3.135

3.3

3.432

3.465

V

Ƞ

Efficiency

VIN = 12V,

ILOAD = 2A

78

78

—

%

AP1509 - 5V

VOUT

Output Voltage

7V < VIN < 22V

0.2A < ILOAD < 2A

4.8

4.75

5

5.2

5.25

V

Ƞ

Efficiency

VIN = 12V,

ILOAD = 2A

83

83

—

%

AP1509 - 12V

VOUT

Output Voltage

15V < VIN < 22V

0.2A < ILOAD < 2A

11.52

11.4

12

12.48

12.6

V

Ƞ

Efficiency

VIN = 15V,

ILOAD = 2A

90

90

—

%