© Semiconductor Components Industries, LLC, 2006

November, 2006 − Rev. 14

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Publication Order Number:

NCP551/D

NCP551, NCV551

150 mA CMOS Low Iq

Low−Dropout Voltage

Regulator

The NCP551 series of fixed output low dropout linear regulators are

designed for handheld communication equipment and portable battery

powered applications which require low quiescent. The NCP551

series features an ultra−low quiescent current of 4.0

mA. Each device

contains a voltage reference unit, an error amplifier, a PMOS power

transistor, resistors for setting output voltage, current limit, and

temperature limit protection circuits.

The NCP551 has been designed to be used with low cost ceramic

capacitors and requires a minimum output capacitor of 0.1

mF. The

device is housed in the micro−miniature TSOP−5 surface mount

package. Standard voltage versions are 1.5, 1.8, 2.5, 2.7, 2.8, 2.9, 3.0,

3.1, 3.2, 3.3, and 5.0 V. Other voltages are available in 100 mV steps.

Features

and Control Changes

Typical Applications

Figure 1. Representative Block Diagram

Driver w/

Current

Limit

Thermal

Shutdown

Enable

GND

OFF

ON

1

3

5

2

See detailed ordering and shipping information in the package

dimensions section on page 9 of this data sheet.

ORDERING INFORMATION

TSOP−5

(SOT23−5, SC59−5)

SN SUFFIX

CASE 483

PIN CONNECTIONS AND

MARKING DIAGRAM

1

3

N/C

2

GND

Enable

4

5

(Top View)

http://onsemi.com

xxx = Specific Device Code

A

= Assembly Location

Y

= Year

W

= Work Week

G

= Pb−Free Package

(Note: Microdot may be in either location)

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