AP1605

PWM/PFM DUAL-MODE STEP-DOWN SWITCHING

REGULATOR

AP1605 Rev. 1

3 of 7

JANUARY 2007

www.diodes.com

Absolute Maximum Ratings

Symbol

Parameter

Rating

Unit

V

V

FB

FB Pin Voltage

V

ON/OFF Pin Voltage

V

Switch Pin Voltage

V

Power Dissipation

1200

mW

Operating Temperature Range

-20 to +85

Storage Temperature Range

-20 to +125

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.

Symbol

Parameter

Conditions

Min.

Typ.

Max.

Unit

Input Voltage

AP1605 Series

2.5

--

7

V

Internal Reference Voltage

1.1625

1.2

1.2375

V

UVLO Voltage

--

--

2.2

V

MAXDTY Maximum Duty Ratio

100

--

--

%

PFMDTY PFM Duty Ratio

15

25

35

%

Switch Current

Duty = 50%

3

--

--

A

Current Consumption

--

35

100

µA

Current Consumption

During Power Off

--

--

2

µA

--

0.2

0.5

%

0.1A~3A

--

1

1.5

%

Oscillation Frequency

220

300

380

KHz

CE Pin “High” Voltage

Evaluate oscillation at SW pin

0.65

--

--

CE Pin “Low” Voltage

Evaluate oscillation stop at SW

pin

--

--

0.2

*Vcc

--

-0.1

--

0.1

µA

Power-Off Pin Input

Leakage Current

--

-0.1

--

0.1

µA

EFFI

Efficiency

--

93

--

%