Diodes AP3440 Manuel d'utilisateur télécharger pdf (Page 5)

AP3440

Document number: DS36691 Rev. 2 - 2

5 of 15

www.diodes.com

March 2014

AP3440

A Product Line of

Diodes Incorporated

NEW P RODUC T

Electrical Characteristics (Cont.) (@V

=2.95 to 5.5V, T

=+25ºC, unless otherwise specified. Specifications with boldface type

apply over full operating temperature range from -40 to +85ºC.)

Symbol

Parameters

Conditions

Min

Typ

Max

Unit

VOLTAGE REFERENCE (FB PIN)

REF

Voltage Reference

2.95V≤V

≤5.5V

0.779

0.803

0.827

MOSFET

ON_H

High Side Switch On-

resistance

BOOT-SW

=5V

—

m

BOOT-SW

=2.95V

—

m

ON_L

Low Side Switch On-

resistance

=5V

—

m

=2.95V

—

mΩ

CURRENT LIMIT

LIMIT

Current Limit Threshold

—

4.2

7.0

—

THERMAL SHUTDOWN

TSD

Thermal Shutdown

—

140

—

C

—

Hysteresis

—

C

TIMING RESISTOR AND EXTERNAL CLOCK (RT/CLK PIN)

—

Switching Frequency Range

(RT Mode)

—

200

—

2000

kHz

—

Switching Frequency Range

(CLK Mode)

—

300

—

2000

kHz

Switching Frequency

=400k

400

500

600

kHz

—

Minimum CLK Pulse Width

—

RT/CLK Voltage

=400k

—

0.5

—

RT/CLK High Threshold

—

1.6

2.2

—

RT/CLK Low Threshold

—

0.4

0.6

—

BOOT (BOOT PIN)

BOOT

BOOT Charge Resistor

=5V

—



—

BOOT-SW UVLO

=2.95V

—

2.2

—

SOFT START (SS PIN)

Charge Current

=0.4V

—

SS to Reference Crossover

98% Nominal

—

1.1

—

POWER GOOD (PGD PIN)

FB_TH

Feedback Threshold

Falling (Fault)

—

REF

Rising (Good)

—

Rising (Fault)

—

107

—

Falling (Good)

—

105

—

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Diodes AP3440 Manuel d'utilisateur Page 5

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