AP3401

Document number: DS37389 Rev. 2 - 2

3 of 11

www.diodes.com

June 2016

© Diodes Incorporated

AP3401

Functional Block Diagram

1.5 M OSC

SLOPE COMP

FREQ

SHIFT

S

R

Q

_

Q

EA

_

+

SWITCHING

LOGIC AND

BLOCKING

CIRCUIT

ANTI -

SHOOT

THRU

PWM

COMP

_

+

+

IAMP

FB

EN

VIN

LX

GND

SHUTDOWN

____

OSC

V REF

0.6

CONTROL

LOGIC

+

PG

4(3)

3(4)

2(5)

5(2)

1(1)

6(6)

A(B)

A for TSOT26

B for U-DFN2020-6

Symbol

Parameter

Rating

Unit

Input Voltage

-0.3 to 6

V

EN Pin Voltage

V

LX Pin Voltage

V

Feedback Pin Voltage

V

TSOT26

0.4

W

U-DFN2020-6 (Type J)

1.89

Thermal Resistance (Junction to Ambient)

TSOT26

220

°C/W

U-DFN2020-6 (Type J)

53

Thermal Resistance (Junction to Case,

Simulation)

TSOT26

130

ºC/W

U-DFN2020-6 (Type J)

25

Operating Junction Temperature

+155

°C

Storage Temperature

-55 to +150

°C

ESD (Machine Model)

200

V

ESD (Human Body Model)

2000

V

ESD (Charge Device Mode)

1000

V

Note 4:

Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and

functional operation of the device at these or any other conditions beyond those indicated under “Recommended Operating Conditions” is not implied.

Exposure to “Absolute Maximum Ratings” for extended periods may affect device reliability.