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NCP500

150 mA CMOS Low Noise Low−Dropout Voltage Regulator

ON Semiconductor 

NCP500

150 mA CMOS Low Noise

Low−Dropout Voltage

Regulator

The NCP500 series of fixed output low dropout linear regulators are

designed for portable battery powered applications which require low

noise operation, fast enable response time, and low dropout. The

device achieves its low noise performance without the need of an

external noise bypass capacitor. Each device contains a voltage

reference unit, an error amplifier, a PMOS power transistor, and

resistors for setting output voltage, and current limit and temperature

limit protection circuits.

The NCP500 has been designed to be used with low cost ceramic

capacitors and requires a minimum output capacitor of 1.0 mF.

Features

• Ultra−Low Dropout Voltage of 170 mV at 150 mA

• Fast Enable Turn−On Time of 20 msec

• Wide Operating Voltage Range of 1.8 V to 6.0 V

• Excellent Line and Load Regulation

• High Accuracy Output Voltage of 2.5%

• Enable Can Be Driven Directly by 1.0 V Logic

• Typical RMS Noise Voltage 50 mV with No Bypass Capacitor

(BW = 10 Hz to 100 kHz)

• Very Small DFN 2x2.2 Package

• Pb−Free Packages are Available

Typical Applications

• Noise Sensitive Circuits − VCO’s, RF Stages, etc.

• SMPS Post−Regulation

• Hand−Held Instrumentation

• Camcorders and Cameras

Vin

1 (3)

Thermal

Shutdown

Driver w/

Current

Limit

Enable

ON 3 (1)

Vout

5 (4)

OFF

GND 2 (2, 5)

NOTE: Pin numbers in parenthesis indicate DFN package.

Figure 1. Simplified Block Diagram

© Semiconductor Components Industries, LLC, 2006

1

February, 2006 − Rev. 19

http://onsemi.com

5

1

1

6

TSOP−5

SN SUFFIX

CASE 483

DFN 2x2.2 MM

SQL SUFFIX

CASE 488

PIN CONNECTIONS AND

MARKING DIAGRAMS

TSOP−5

Vin 1

GND 2

5 Vout

Enable 3

4 N/C

(Top View)

xxx = Specific Device Code

A = Assembly Location

Y = Year

W = Work Week

G = Pb−Free Package

(Note: Microdot may be in either location)

DFN 2x2.2 mm

Enable 1

6 N/C

GND 2 xxM 5 GND

Vin 3

4 Vout

(Top View)

xx = Specific Device Code

M = Date Code

ORDERING INFORMATION

See detailed ordering and shipping information in the package

dimensions section on page 17 of this data sheet.

*For additional information on our Pb−Free strategy

and soldering details, please download the ON

Semiconductor Soldering and Mounting Techniques

Reference Manual, SOLDERRM/D.

Publication Order Number:

NCP500/D

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