Block Diagram

2

Pin Configuration & Marking Information

Top View

TDFN22-8

CH: Product Code

of PAM2316

V:

Output Voltage

Y:

Year

W: Week

,

Power Analog Microelectronics Inc

www.poweranalog.com

Pin NO.

Name

Function

1

PGND

Main power ground return pin. Connect to the output and input capacitor return.

2

PVIN

Input power supply tied to the source of the high side P-channel MOSFET.

3

V IN

Power supply; supplies power for the internal circuitry.

4

FB

Feedback input pin. Feedback v oltage to internal error amplifier, the threshold

voltage is 0.6V.

5

AGND

Analog ground. This pin is internally connected to the analog ground of the

control circuitry.

6

EN

Enable pin. A logic low disables the converter and it consumes less than 1

μA of

current. W hen connected high, it resumes normal operation.

7,8

SW

Switching node. Connect the inductor to this pin. It is internally connected to the

drain of both high and low side MOSFETs.

Pin Description

12/2011 Rev1.1

EN

R1

R2

FB

+

-

IAMP

+

-

IRCMP

SW

PGND

SYNCHRONOUS

RECTIFIER NCH

(

)

MAIN

SWITCH PCH

(

)

PVIN

COMP

VIN

SHUTDOWN

OSC

RS LATCH

0.6VREF

FREQ

SHIFT

-

+

EA

S Q

R Q

SWITCHING

LOGIC

AND

BLANKING

CIRCUIT

SLOPE

COMP

2.5M

OSC

ANTI

SHOOT

THRU

-

-

VIN

GND

PAM2316

2.5MHz,Fast Transient 2A Step-Down Converter

1

2

3

4

8

7

6

5

PGND

PVIN

VIN

FB

AGND

EN

SW

SW

Exposed Pad (GND)