Ap1604a, Absolute maximum ratings, Electrical characteristics – Diodes AP1604 User Manual

Page 3: Pwm/pfm dual mode step-down dc/dc converter

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AP1604A

PWM/PFM DUAL MODE STEP-DOWN DC/DC

CONVERTER

AP1604A Rev. 2

3 of 7

FEBRUARY 2009

www.diodes.com

©

Diodes Incorporated

Absolute Maximum Ratings

(T

A

=25°C)


Symbol

Parameter

Ratings

Units

V

CC

/SV

CC

V

IN

Pin Voltage

-0.3 ~ 6.5

V

V

OUT

V

OUT

Pin Voltage

-0.3 ~ V

IN

+0.3 V

V

FB

FB Pin Voltage

-0.3 ~ V

IN

+0.3 V

V

CE/SS

CE/SS Pin Voltage

-0.3 ~ V

IN

+0.3 V

P

D

Continuous Total Power Dissipation

Internal limited

T

OP

Operating Ambient Temperature

-25 ~ +80

°C

T

ST

Storage Temperature Range

-40 ~ +125

°C



Electrical Characteristics

V

IN

= 5V, V

OUT

=2V, Load = 300mA, T

A

= 25°C

Sym.

Parameter

Conditions

Min

Typ.

Max

Units

V

FB

FB

0.975 1.0 1.025

V

V

IN

Input

Voltage

2.2 - 5.5 V

Line

Regulation

V

IN

= 2.2 ~ 5.5V, Load = 10mA

-

-

0.12

%

Load

Regulation

I

OUT

= 10 ~ 800mA

-

-

1.2

%

V

UVLO

UVLO Voltage(min.
operating voltage)

V

CC

, voltage required to maintain H at

V

OUT

- - 2 V

I

CC

Operating Current

CE/SS = V

IN

, No Load

-

100

150

μA

I

CCQ

Supply

Current

No external components,
CE/SS = V

IN

, V

FB

= 1.2V

- 90

120

μA

I

STB

Stand-by

Current

No external components,
CE/SS = 0V, V

FB

= 0V

- 2 -

μA

I

CL

Current

Limit

peak current
V

IN

= 5V, V

OUT

= 2V

800 1000 1200 mA

Fosc

Oscillator Frequency

Load = 300mA, V

IN

= 5V, V

OUT

= 2V

500

600

700

kHz

MAXDTY Maximum Duty Ratio

85

90

-

%

PFMDTY PFM Duty Ratio

No load

15

25

35

%

V

CEH

CE/SS

”High”

Voltage

Apply 1.4V (min.) to CE/SS, determine
V

OUT

”High”

1.4

- - V

V

CEL

CE/SS ”Low” Voltage

Same as V

CEH

, determine V

OUT

/”Low” - - 0.6 V

EFFI Efficiency

V

CC

= 5V, V

OUT

= 3.3V, Load = 300mA

-

93

-

%

Rdson Rdson

Condition

I

OUT

= 300mA, V

IN

= 5V, V

OUT

= 2V

-

350

450

m

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