ON Semiconductor NCP551, NCV551 Technical data

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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 A. 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 F. 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, 3.0, 3.2,

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

Features

• Low Quiescent Current of 4.0 A Typical

• Maximum Operating Voltage of 12 V

• Low Output Voltage Option

• High Accuracy Output Voltage of 2.0%

• Industrial Temperature Range of −40°C to 85°C

(NCV551, TA = −40°C to +125°C)

• NCV Prefix for Automotive and Other Applications Requiring Site

and Control Changes

• Pb−Free Packages are Available

T ypical Applications

• Battery Powered Instruments

• Hand−Held Instruments

• Camcorders and Cameras

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TSOP−5

(SOT23−5, SC59−5)

SN SUFFIX

CASE 483

PIN CONNECTIONS AND

MARKING DIAGRAM

GND

Enable

See detailed ordering and shipping information in the package dimensions section on page 10 of this data sheet.

xxx = Version Y = Year W = Work Week

(Top View)

ORDERING INFORMATION

xxxYW

out

N/C

Thermal

Shutdown

Enable

OFF

 Semiconductor Components Industries, LLC, 2004

August, 2004 − Rev. 9

Figure 1. Representative Block Diagram

Driver w/

Current

Limit

GND

out

1 Publication Order Number:

NCP551/D

NCP551, NCV551

PIN FUNCTION DESCRIPTION

Pin No.

1 2 3

ÁÁÁ

4 5

MAXIMUM RATINGS

Input Voltage Enable Voltage V Output Voltage Power Dissipation and Thermal Characteristics

Power Dissipation

Thermal Resistance, Junction−to−Ambient Operating Junction Temperature Operating Ambient Temperature NCP551

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Storage Temperature

Maximum ratings are those values beyond which device damage can occur. Maximum ratings applied to the device are individual stress limit values (not normal operating conditions) and are not valid simultaneously . If these limits are exceeded, device functional operation is not implied, damage may occur and reliability may be affected.

1. This device series contains ESD protection and exceeds the following tests: Human Body Model 2000 V per MIL−STD−883, Method 3015 Machine Model Method 200 V

2. Latchup capability (85°C) 100 mA DC with trigger voltage.

Pin Name

GND

Enable

ÁÁÁÁ

N/C V

out

Description

Positive power supply input voltage. Power supply ground. This input is used to place the device into low−power standby. When this input is pulled low, the

device is disabled. If this function is not used, Enable should be connected to Vin.

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No Internal Connection. Regulated output voltage.

Rating Symbol Value Unit

NCV551

out



ÁÁÁ

stg

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0 to 12

−0.3 to V

+0.3 V

+0.3

Internally Limited

250

+150

−40 to +85

−40 to +125

−55 to +150

°C/W

°C °C

ÁÁ

°C

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NCP551, NCV551

ELECTRICAL CHARACTERISTICS

= V

Output Voltage (TA = 25°C, I

1.5 V

1.8 V

2.5 V

2.7 V

2.8 V

3.0 V

3.2 V

3.3 V

5.0 V

Output Voltage (TA = T

1.5 V

1.8 V

2.5 V

2.7 V

2.8 V

3.0 V

3.2 V

3.3 V

5.0 V Line Regulation (Vin = V Load Regulation (I Output Current (V

1.5 V−2.0 V (V

2.1 V−3.0 V (V

3.1 V−4.0 V (V

4.1 V−5.0 V (V Dropout Voltage (I

1.5 V, 1.8 V, 2.5 V

2.7 V, 2.8 V, 3.0 V, 3.2 V, 3.3 V, 5.0 V Quiescent Current

(Enable Input = 0 V)

(Enable Input = V Output Voltage Temperature Coefficient T Enable Input Threshold Voltage

(Voltage Increasing, Output Turns On, Logic High)

(Voltage Decreasing, Output Turns Off, Logic Low) Output Short Circuit Current (V

1.5 V−2.0 V (V

2.1 V−3.0 V (V

3.1 V−4.0 V (V

4.1 V−5.0 V (V

3. Maximum package power dissipation limits must be observed.

4. Low duty cycle pulse techniques are used during testing to maintain the junction temperature as close to ambient as possible.

5. NCP551 T NCV551 T

+ 1.0 V, VEN = Vin, Cin = 1.0 F, C

out(nom.)

Characteristic

= 10 mA)

out

to T

low

high

+ 1.0 V to 12 V, I

out

= 10 mA to 150 mA, Vin = V

out

= (V

out

= 4.0 V)

= 5.0 V)

= 6.0 V)

= 8.0 V)

out

= 4.0 V)

= 5.0 V)

= 6.0 V)

= 8.0 V)

= −40°CT

low

= −40°CT

low

at I

out

= 10 mA, Measured at V

, I

= 1.0 mA to I

out

J(max)

PD 

, I

= 10 mA)

out

= 100 mA) −3%)

out

o(nom.)

= 0 V)

out

 T

JA

= +85°C

high

= +125°C.

high

= 1.0 F, TJ = 25°C, unless otherwise noted.)

out

Symbol Min Typ Max Unit

out

= 10 mA) Reg

out

+ 2.0 V) Reg

out

−3.0%)

out

o(nom.)

Vin−V

line

load

out

)

th(en)

out(max)

1.455

1.746

2.425

2.646

2.744

2.94

3.136

3.234

4.90

1.440

1.728

2.400

2.619

2.716

2.910

3.104

3.201

4.850

1.5

1.8

2.5

2.7

2.8

3.0

3.2

3.3

5.0

1.5

1.8

2.5

2.7

2.8

3.0

3.2

3.3

5.0

1.545

1.854

2.575

2.754

2.856

3.06

3.264

3.366

5.10

1.560

1.872

2.600

2.781

2.884

3.09

3.296

3.399

5.150

− 10 30 mV

− 40 65 mV

150 150 150 150

−

130

0.1

4.0

−

220 150

1.0

8.0

− 100 − ppm/°C

1.3

−

160 160 160 160

−

350 350 350 350

−

0.3

600 600 600 600

A

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NCP551, NCV551

DEFINITIONS

Load Regulation

The change in output voltage for a change in output

current at a constant temperature.

Dropout Voltage

The input/output differential at which the regulator output no longer maintains regulation against further reductions in input voltage. Measured when the o utput d rops 3% b elow i ts nominal. The junction temperature, load current, and minimum input supply r equirements a ffect t he d ropout l e vel.

Maximum Power Dissipation

The maximum total dissipation for which the regulator will operate within its specifications.

Quiescent Current

The quiescent current is the current which flows through the ground when the LDO operates without a load on its output: internal IC operation, bias, etc. When the LDO becomes loaded, this term is called the Ground current. It is actually the difference between the input current (measured through the LDO input pin) and the output current.

Line Regulation

The change in output voltage for a change in input voltage. The measurement is made under conditions of low dissipation or b y using pulse technique such that the average chip temperature is not significantly affected.

Line Transient Response

Typical over and undershoot response when input voltage is excited with a given slope.

Thermal Protection

Internal thermal shutdown circuitry is provided to protect the integrated circuit in the event that the maximum junction temperature is exceeded. When activated at typically 160°C, the regulator turns off. This feature is provided to prevent failures from accidental overheating.

Maximum Package Power Dissipation

The maximum power package dissipation is the power dissipation level at which the junction temperature reaches its maximum operating value, i.e. 125°C. Depending on the ambient power dissipation and thus the maximum available output current.

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