© Semiconductor Components Industries, LLC, 2007

March, 2007 − Rev. 0

1

Publication Order Number:

NCP3520/D

NCP3520/NCP3521

LDO Regulator Controller

The NCP3520 / NCP3521 parts are Low Drop Out (LDO) regulator

controllers for applications requiring high−currents and ultra low

dropout voltages. The use of an external NMOS driver allows the user

to adapt the device to a multitude of applications depending on system

requirements for current and dropout voltage.

Features

Rohm BD3501FVM and BD3502FVM

Typical Applications

Figure 1. Application Diagram

NCP3520

NCP3521

VD

G

VS

VFB

EN

NRCS

GND

VCC

utilize a Kelvin connection at the load.

10 mF

220 mF

NTMS4107N

or equivalent

3.0 A

5.0 A

1.0 mF

0.01 mF

PIN CONNECTIONS

XXXX

= 3520 for Fixed 1.2 V or

= 3521 for Fixed 1.5 V

A

= Assembly Location

Y

= Year

W

= Work Week

G

= Pb−Free Package

Micro8

DM SUFFIX

CASE 846A

STYLE 2

MARKING

DIAGRAM

1

VD

GND

NRCS

EN

VCC

G

VFB

VS

Micro8

(Top View)

1

2

3

4

8

7

6

5

http://onsemi.com

XXXX

AYW G

G

1

8

(Note: Microdot may be in either location)

See detailed ordering and shipping information in the package

dimensions section on page 9 of this data sheet.

ORDERING INFORMATION