PAM2421/ PAM2422/ PAM2423

Document number: DS36383 Rev. 2 - 2

1 of 10

www.diodes.com

January 2016

© Diodes Incorporated

PAM2421/ PAM2422/ PAM2423

3A, 4.5A, 5.5A PWM STEP-UP DC-DC CONVERTER

Description

The PAM242x devices are high-performance, fixed frequency,

current-mode PWM step-up DC/DC converters that incorporate

internal power MOSFETs. The PAM242x includes an integrated

power MOSFET that supports peak currents of up to 3A/4.5A/5.5A.

The PAM242x utilizes simple external loop compensation allowing

optimization between component size, cost and AC performance

across a wide range of applications. Additional functions include an

externally programmable soft-start function for easy inrush current

control, internal over-voltage protection (OVP), cycle-by-cycle current

limit protection, under voltage lock-out and thermal shutdown.

The PAM242x is available in the small SO-8EP package.

Features



Greater than 90% Efficiency



Adjustable Output Voltage Up to 24V



Internal 24V Power MOSFET



Peak Current 3A,4.5A,5.5A



520kHz Frequency



Built-in Over-Voltage Protection (OVP)



Open Protection



Programmable Soft-Start Function



Thermal Shutdowns



Under-Voltage-Lockout



Over-Current Protection



SO-8EP Package

Pin Assignments

Applications



TFT LCD Monitors



Battery-Powered Equipment



Set-Top Boxes



DSL and Cable Modems and Routers

Typical Applications Circuit

VIN

AGND

COMP

SS

VIN

3.6V ~ 5.5V

R3

51k

EN

SW

C1

470mF

VOUT

12V/800mA

C2

10mF

C3

1mF

PGND

FB

PAM242X

C6

47pF

C4

10mF

C5

470mF

SS34

C8

10nF

R1

85k

R2

10k

C7

2.2nF

L1

6.8mH

SO-8EP