NCV4266ST50T3G_技术文档

NCV4266

150 mA Low-Dropout

Voltage Regulator with

Enable

The NCV4266 is a 150 mA output current integrated low dropout

regulator family designed for use in harsh automotive environments.

It includes wide operating temperature and input voltage ranges. The

device is offered with fixed voltage versions of 3.3 V and 5.0 V

available in 2% output voltage accuracy. It has a high peak input

voltage tolerance and reverse input voltage protection. It also

provides overcurrent protection, overtemperature protection and

enable function for control of the state of the output voltage. The

NCV4266 is available in SOT−223 surface mount package. The

output is stable over a wide output capacitance and ESR range. The

NCV4266 has improved startup behavior during input voltage

transients.

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MARKING

DIAGRAM

SOT−223

(TO−261)

ST SUFFIX

AYW

4266xG

G

CASE 318E

1

A

Y

W

x

= Assembly Location

= Year

= Work Week

= Voltage Option

3.3 V (x = 3)

Features

• 3.3 V and 5.0 V Output Voltage

• 150 mA Output Current

• 500 mV (max) Dropout Voltage

• Enable Input

5.0 V (x = 5)

= Pb−Free Package

G

(*Note: Microdot may be in either location)

• Very Low Current Consumption

• Fault Protection

♦ +45 V Peak Transient Voltage

♦ −42 V Reverse Voltage

ORDERING INFORMATION

See detailed ordering and shipping information in the ordering

information section on page 10 of this data sheet.

♦ Short Circuit

♦ Thermal Overload

• NCV Prefix for Automotive and Other Applications Requiring

Unique Site and Control Change Requirements; AEC−Q100

Qualified and PPAP Capable

• These are Pb−Free Devices

I

Q

Error

Amplifier

Current Limit and

Saturation Sense

Bandgap

Reference

−

+

Thermal

Shutdown

EN

GND

Figure 1. Block Diagram

©

Semiconductor Components Industries, LLC, 2012

1

Publication Order Number:

June, 2012 − Rev. 2

NCV4266/D

NCV4266

PIN FUNCTION DESCRIPTION

Pin No.

Symbol

Description

1

2

3

4

I

Input; Battery Supply Input Voltage.

EN

Q

Enable Input; low level disables the IC.

Output; Bypass with a capacitor to GND.

Ground.

GND

MAXIMUM RATINGS*

Rating

Symbol

Min

−42

−

Max

45

Unit

V

Input Voltage

V

I

V

I

Input Peak Transient Voltage

Enable Input Voltage

Output Voltage

45

V

−42

−1.0

−

45

V

EN

V

40

V

Q

Ground Current

I

100

40

mA

V

q

Input Voltage Operating Range

V

Q

+ 0.5 V or

4.5 (Note 1)

I

ESD Susceptibility

(Human Body Model)

(Machine Model)

−

4.0

250

−

kV

V

Junction Temperature

Storage Temperature

T

−40

−50

150

°C

J

T

stg

Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the

RecommendedOperating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect

device reliability.

*During the voltage range which exceeds the maximum tested voltage of I, operation is assured, but not specified. Wider limits may apply. Thermal

dissipation must be observed closely.

1. Minimum V = 4.5 V or (V + 0.5 V), whichever is higher.

I

Q

LEAD TEMPERATURE SOLDERING REFLOW AND MSL (Note 2)

Rating

Symbol

Min

Max

Unit

Lead Temperature Soldering

T

SLD

°C

Reflow (SMD styles only), Leaded, 60−150 s above 183, 30 s max at peak

Reflow (SMD styles only), Free, 60−150 s above 217, 40 s max at peak

Wave Solder (through hole styles only), 12 sec max

−

240

265

310

Moisture Sensitivity Level

MSL

3

−

2. Per IPC / JEDEC J−STD−020C.

THERMAL CHARACTERISTICS

Characteristic

Test Conditions (Typical Value)

Unit

Min Pad Board (Note 3)

1, Pad Board (Note 4)

Junction−to−Tab (psi−JL4, y

)

15.7

96

18

C/W

JL4

Junction−to−Ambient (R , q

)

77

q

JA JA

2

3. 1 oz. copper, 0.26 inch (168 mm ) copper area, 0.062″ thick FR4.

4. 1 oz. copper, 1.14 inch (736 mm ) copper area, 0.062″ thick FR4.

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2

NCV4266

ELECTRICAL CHARACTERISTICS (V = 13.5 V; −40°C < T < 150°C; unless otherwise noted.)

I

J

Characteristic

OUTPUT

Symbol

Test Conditions

Min

Typ

Max

Unit

Output Voltage (5.0 V Version)

Output Voltage (3.3 V Version)

Output Current Limitation

V

5.0 mA < I < 150 mA, 6 V < V < 28 V

4.9

3.234

150

−

5.0

3.3

200

−

5.1

3.366

500

10

V

Q

I

5.0 mA < I < 150 mA, 4.5 V < V < 28 V

Q

I

Q

V

= 90% V

QTYP

mA

Q

Quiescent Current (Sleep Mode)

I

q

= 0 V

EN

I = I − I

q

I

Q

Quiescent Current, I = I − I

I

= 1.0 mA

= 150 mA

−

130

10

200

15

500

20

25

−

mA

mV

dB

q

I

Q

q

Q

Quiescent Current, I = I − I

I

q

I

Q

Dropout Voltage (5.0 V Version)

Load Regulation

V

DR

= 150 mA, V = V − V (Note 5)

250

3.0

10

DR

I

Q

DV

= 5.0 mA to 150 mA

Q,LO

Line Regulation (5.0 V Version)

Line Regulation (3.3 V Version)

Power Supply Ripple Rejection

Temperature Output Voltage Drift

DV

DV = 6.0 V to 28 V, I = 5.0 mA

I Q

Q

DV

DV = 4.5 V to 28 V, I = 5.0 mA

10

I

Q

PSRR

f = 100 Hz, V = 0.5 V

r

70

r

PP

d

−

0.5

−

mV/K

VQ/dT

ENABLE INPUT

Enable Voltage, Output High

V

w V

QMIN

−

2.3

2.2

10

2.8

−

V

EN

Q

Enable Voltage, Output Low (Off)

v 0.1 V

1.8

5.0

Q

Enable Input Current

I

= 5.0 V

20

mA

EN

THERMAL SHUTDOWN

Thermal Shutdown Temperature*

T

SD

150

−

210

°C

*Guaranteed by design, not tested in production.

5. Measured when the output voltage V has dropped 100 mV from the nominal value obtained at V = 13.5 V.

Q

Output

I

Q

I 1

3 Q

Input

C

I1

C

I2

C

Q

1.0 mF

100 nF

22 mF

NCV4266

EN

R

L

2

4

I

EN

GND

Figure 2. Applications Circuit

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3

NCV4266

TYPICAL PERFORMANCE CHARACTERISTICS

100

Unstable Region

C

Q

= 10 mF − 100 mF

10

1

Stable Region

0.1

0.01

0

25

50

75

100

125

150

OUTPUT CURRENT (mA)

Figure 3. Output Stability with Output Capacitor ESR

5.2

5.1

5.0

4.9

4.8

3.5

V = 13.5 V

R = 1 kW

L

V = 13.5 V

I

R = 660 W

L

I

3.4

3.3

3.2

3.1

−40

0

40

80

120

160

−40

0

40

80

120

160

T , JUNCTION TEMPERATURE (°C)

J

T , JUNCTION TEMPERATURE (°C)

J

Figure 4. Output Voltage vs. Junction

Temperature, 5.0 V Version

Figure 5. Output Voltage vs. Junction

Temperature, 3.3 V Version

6

25

20

15

10

5

T = 25°C

R = 33 W

L

T = 25°C

J

R = 22 W

L

J

5

4

3

2

1

0

5

10

15

20

25

30

35

40

0

5

10

15

20

25

30

35

40

V , INPUT VOLTAGE (V)

I

V , INPUT VOLTAGE (V)

I

Figure 6. Quiescent Current vs. Input Voltage,

5.0 V Version

Figure 7. Quiescent Current vs. Input Voltage,

3.3 V Version

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NCV4266

TYPICAL PERFORMANCE CHARACTERISTICS

6

5

4

3

2

1

0

6

T = 25°C

R = 22 W

L

T = 25°C

R = 33 W

L

J

5

4

3

2

1

0

2

4

6

8

10

0

2

4

6

8

10

V , INPUT VOLTAGE (V)

I

V , INPUT VOLTAGE (V)

I

Figure 8. Output Voltage vs. Input Voltage,

5.0 V Version

Figure 9. Output Voltage vs. Input Voltage,

3.3 V Version

6.0

4.0

1

0

−1

−2

−3

−4

−5

2.0

0

−2.0

−4.0

−6.0

T = 25°C

R = 6.8 kW

L

T = 25°C

R = 6.8 kW

L

J

−8.0

−10

−6

−7

−50

−25

0

25

50

−50

−25

0

25

50

V , INPUT VOLTAGE (V)

I

V , INPUT VOLTAGE (V)

I

Figure 11. Input Current vs. Input Voltage,

3.3 V Version

Figure 10. Input Current vs. Input Voltage,

5.0 V Version

400

350

300

250

200

150

100

50

300

250

T = 25°C

J

V

Q

= 0 V

T = 125°C

J

200

150

T = 25°C

J

100

50

0

25

50

75

100

125

150

0

5

10

15

20

25

30

35

40

I , OUTPUT CURRENT (mA)

Q

V , INPUT VOLTAGE (V)

I

Figure 12. Dropout Voltage vs. Output Current

(5.0 V Version only)

Figure 13. Maximum Output Current vs.

Input Voltage

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NCV4266

TYPICAL PERFORMANCE CHARACTERISTICS

6

1

0.8

0.6

0.4

0.2

0

T = 25°C

V = 13.5 V

I

T = 25°C

V = 13.5 V

I

J

5

4

3

2

1

0

5

10

15

20

25

30

0

25

50

75

100

125

150

I , OUTPUT CURRENT (mA)

Q

I , OUTPUT CURRENT (mA)

Q

Figure 14. Quiescent Current vs. Output Current

(Low Load), 5.0 V Version

Figure 15. Quiescent Current vs. Output

Current (High Load), 5.0 V Version

6

5

4

3

2

1

0

1

0.8

0.6

0.4

0.2

0

T = 25°C

V = 13.5 V

I

J

T = 25°C

V = 13.5 V

I

J

0

5

10

15

20

25

30

0

25

50

75

100

125

150

I , OUTPUT CURRENT (mA)

Q

I , OUTPUT CURRENT (mA)

Q

Figure 17. Quiescent Current vs. Output

Current (High Load), 3.3 V Version

Figure 16. Quiescent Current vs. Output Current

(Low Load), 3.3 V Version

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6

NCV4266

Circuit Description

transient response and loop stability. The capacitor value

and type should be based on cost, availability, size and

temperature constraints. The aluminum electrolytic

capacitor is the least expensive solution, but, if the circuit

operates at low temperatures (−25°C to −40°C), both the

value and ESR of the capacitor will vary considerably. The

capacitor manufacturer’s data sheet usually provides this

information.

The NCV4266 is an integrated low dropout regulator that

provides a regulated voltage at 150 mA to the output. It is

enabled with an input to the enable pin. The regulator

voltage is provided by a PNP pass transistor controlled by

an error amplifier with a bandgap reference, which gives it

the lowest possible dropout voltage. The output current

capability is 150 mA, and the base drive quiescent current

is controlled to prevent oversaturation when the input

voltage is low or when the output is overloaded. The

regulator is protected by both current limit and thermal

shutdown. Thermal shutdown occurs above 150°C to

protect the IC during overloads and extreme ambient

temperatures.

The value for the output capacitor C , shown in Figure 2,

Q

should work for most applications; see also Figure 3 for

output stability at various load and Output Capacitor ESR

conditions. Stable region of ESR in Figure 3 shows ESR

values at which the LDO output voltage does not have any

permanent oscillations at any dynamic changes of output

load current. Marginal ESR is the value at which the output

voltage waving is fully damped during four periods after

the load change and no oscillation is further observable.

ESR characteristics were measured with ceramic

capacitors and additional series resistors to emulate ESR.

Low duty cycle pulse load current technique has been used

to maintain junction temperature close to ambient

temperature.

Regulator

The error amplifier compares the reference voltage to a

sample of the output voltage (V ) and drives the base of a

Q

PNP series pass transistor via a buffer. The reference is a

bandgap design to give it a temperature−stable output.

Saturation control of the PNP is a function of the load

current and input voltage. Oversaturation of the output

power device is prevented, and quiescent current in the

ground pin is minimized. See Figure 2, Test Circuit, for

circuit element nomenclature illustration.

Enable Input

The enable pin is used to turn the regulator on or off. By

holding the pin down to a voltage less than 1.8 V, the output

of the regulator will be turned off. When the voltage on the

enable pin is greater than 2.8 V, the output of the regulator

will be enabled to power its output to the regulated output

voltage. The enable pin may be connected directly to the

input pin to give constant enable to the output regulator.

Regulator Stability Considerations

The input capacitors (C and C ) are necessary to

stabilize the input impedance to avoid voltage line

influences. Using a resistor of approximately 1.0 W in

I1

I2

series with C can stop potential oscillations caused by

I2

stray inductance and capacitance.

The output capacitor helps determine three main

characteristics of a linear regulator: startup delay, load

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NCV4266

Calculating Power Dissipation

Heatsinks

in a Single Output Linear Regulator

The maximum power dissipation for a single output

regulator (Figure 18) is:

A heatsink effectively increases the surface area of the

package to improve the flow of heat away from the IC and

into the surrounding air.

Each material in the heat flow path between the IC and

the outside environment will have a thermal resistance.

Like series electrical resistances, these resistances are

P

+ [V

I(max)

* V

]I

(1)

D(max)

Q(min) Q(max)

) V

I

I(max) q

summed to determine the value of R

:

JA

where

q

(3)

R

+ R

qJC

) R ) R

qCS qSA

V

I

is the maximum input voltage,

is the minimum output voltage,

is the maximum output current for the

application,

qJA

I(max)

Q(min)

Q(max)

where

R

is the junction−to−case thermal resistance,

is the case−to−heatsink thermal resistance,

is the heatsink−to−ambient thermal

resistance.

JC

q

CS

SA

I

is the quiescent current the regulator

q

consumes at I

.

Q(max)

Once the value of P

permissible value of R

is known, the maximum

D(max)

R

q

appears in the package section of the data sheet.

JC

can be calculated:

JA

q

Like R , it too is a function of package type. R

and

JA

CS

q

o

T

150 C *

A

R

qJA

+

R

are functions of the package type, heatsink and the

interface between them. These values appear in data sheets

of heatsink manufacturers.

(2)

SA

q

P

D

The value of R

can then be compared with those in the

JA

q

package section of the data sheet. Those packages with

Thermal, mounting, and heatsinking considerations are

discussed in the ON Semiconductor application note

AN1040/D.

R

less than the calculated value in Equation 2 will keep

JA

q

the die temperature below 150°C.

In some cases, none of the packages will be sufficient to

dissipate the heat generated by the IC, and an external

heatsink will be required.

I

Q

I

SMART

REGULATOR®

V

I

V

Q

Control

Features

}

Iq

Figure 18. Single Output Regulator with Key

Performance Parameters Labeled

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8

NCV4266

140

130

120

110

100

90

1 oz

2 oz

80

70

60

0

100

200

300

400

500

600

700

2

COPPER HEAT SPREADER AREA (mm )

Figure 19. R_q_JAvs. Copper Spreader Area

100

10

1

2

Cu Area 167 mm

2

Cu Area 736 mm

0.1

0.000001

0.00001

0.0001

0.001

0.01

0.1

1

10

100

1000

TIME (sec)

Figure 20. Single−Pulse Heating Curves

100

10

1

50% Duty Cycle

20%

10%

5%

2%

1%

Non−normalized Response

0.1

0.000001

0.00001

0.0001

0.001

0.01

0.1

1

10

100

1000

PULSE WIDTH (sec)

Figure 21. Duty Cycle for 1, Spreader Boards

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9

NCV4266

ORDERING INFORMATION

Device

†

Output Voltage

Package

Shipping

NCV4266ST33T3G

3.3 V

SOT−223

(Pb−Free)

4000 / Tape & Reel

NCV4266ST50T3G

5.0 V

SOT−223

(Pb−Free)

†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging

Specifications Brochure, BRD8011/D.

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10

NCV4266

PACKAGE DIMENSIONS

SOT−223 (TO−261)

CASE 318E−04

ISSUE N

D

b1

NOTES:

1. DIMENSIONING AND TOLERANCING PER ASME Y14.5M,

1994.

2. CONTROLLING DIMENSION: INCH.

MILLIMETERS

INCHES

4

2

DIM

A

A1

b

b1

c

D

E

e

e1

L

L1

MIN

1.50

0.02

0.60

2.90

0.24

6.30

3.30

2.20

0.85

0.20

1.50

6.70

0°

NOM

1.63

0.06

0.75

3.06

0.29

6.50

3.50

2.30

0.94

−−−

1.75

7.00

−

MAX

MIN

0.060

0.001

0.024

0.115

0.009

0.249

0.130

0.087

0.033

0.008

0.060

0.264

0°

NOM

0.064

0.002

0.030

0.121

0.012

0.256

0.138

0.091

0.037

−−−

MAX

0.068

0.004

0.035

0.126

0.014

0.263

0.145

0.094

0.041

−−−

H

E

1.75

0.10

0.89

3.20

0.35

6.70

3.70

2.40

1.05

−−−

2.00

7.30

10°

1

3

b

e1

e

0.069

0.276

−

0.078

0.287

10°

C

q

H

E

A

q

0.08 (0003)

A1

L

L1

SOLDERING FOOTPRINT

3.8

0.15

2.0

0.079

6.3

0.248

2.3

0.091

2.3

0.091

2.0

0.079

mm

1.5

0.059

ǒ_inches

Ǔ

SCALE 6:1

ON Semiconductor and

are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC owns the rights to a number of patents, trademarks,

copyrights, trade secrets, and other intellectual property. A listing of SCILLC’s product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent−Marking.pdf . SCILLC

reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products

for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including

without limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different

applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical

experts. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components

in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product

could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall

indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney

fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was

negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws

and is not for resale in any manner.

PUBLICATION ORDERING INFORMATION

LITERATURE FULFILLMENT:

N. American Technical Support: 800−282−9855 Toll Free

USA/Canada

Europe, Middle East and Africa Technical Support:

Phone: 421 33 790 2910

Japan Customer Focus Center

Phone: 81−3−5817−1050

ON Semiconductor Website: www.onsemi.com

Order Literature: http://www.onsemi.com/orderlit

Literature Distribution Center for ON Semiconductor

P.O. Box 5163, Denver, Colorado 80217 USA

Phone: 303−675−2175 or 800−344−3860 Toll Free USA/Canada

Fax: 303−675−2176 or 800−344−3867 Toll Free USA/Canada

Email: orderlit@onsemi.com

For additional information, please contact your loca

Sales Representative

NCV4266/D

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型号：	NCV4266ST50T3G
厂家：	ONSEMI
描述：	150 mA Low-Dropout Voltage Regulator with Enable 光电二极管输出元件调节器
文件：	总11页 (文件大小：122K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

NCV4266ST50T3G [ONSEMI]

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