NCV4266-2CST50T3G_技术文档

NCV4266-2C

150 mA Low I_q,

Low-Dropout Voltage

Regulator with Enable

The NCV4266−2C is a 150 mA output current integrated low

dropout, low quiescent current 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 NCV4266−2C is

available in SOT−223 surface mount package. The output is stable

over a wide output capacitance and ESR range. The NCV4266−2C

has improved startup behavior during input voltage transients.

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MARKING

DIAGRAM

SOT−223

(TO−261)

ST SUFFIX

AYW

662CxG

G

CASE 318E

1

A

Y

W

x

= Assembly Location

= Year

= Work Week

= Voltage Option

3.3 V (x = 3)

Features

• Output Voltage Options: 3.3 V, 5.0 V

• Output Voltage Accuracy: 2.0%

• Output Current: up to 150 mA

• Low Quiescent Current (typ. 40 mA @ 100 mA)

• Low Dropout Voltage (typ. 250 mV @ 100 mA)

• Enable Input

5.0 V (x = 5)

= Pb−Free Package

G

(Note: Microdot may be in either location)

• Fault Protection

ORDERING INFORMATION

See detailed ordering and shipping information in the ordering

information section on page 10 of this data sheet.

♦ +45 V Peak Transient Voltage

♦ −42 V Reverse Voltage

♦ Short Circuit

♦ Thermal Overload

• AEC−Q100 Grade 1 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, 2015

1

Publication Order Number:

March, 2015 − Rev. 0

NCV4266−2C/D

NCV4266−2C

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

45

V

EN

V

−0.3

−

32

V

Q

Ground Current

I

100

45

mA

V

q

Input Voltage Operating Range

V

Q

+ 0.5 V or

I

4.5 (Note 1)

ESD Susceptibility

(Human Body Model)

−

3.0

−

kV

°C

Junction Temperature

Storage Temperature

T

J

−40

150

T

stg

−50

Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality

should not be assumed, damage may occur and reliability may be affected.

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 RESISTANCE

Parameter

Junction−to−Ambient

Junction−to−Tab

Symbol

Condition

Min

Max

Unit

SOT−223

R

q

JA

−

109 (Note 3)

10.9

°C/W

Ry

−

°C/W

JT

2

3. 1 oz copper, 100 mm copper area, FR4.

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2

NCV4266−2C

ELECTRICAL CHARACTERISTICS (−40°C < T < 150°C, V = 13.5 V, V = 5 V; unless otherwise noted.)

J

I

EN

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

100 mA < I < 150 mA, 6.0 V < V < 28 V

4.9

3.234

150

−

5.0

3.3

200

0

5.1

3.366

500

V

Q

I

100 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, T = −40°C to 100°C

1.0

EN

J

I = I − I

q

I

Q

Quiescent Current, I = I − I

I

= 100 mA, T < 85°C

−

40

60

70

4.0

500

90

60

30

20

−

mA

q

I

Q

q

Q

J

Quiescent Current, I = I − I

I

Q

I

Q

I

Q

I

Q

I

Q

= 100 mA

q

I

Quiescent Current, I = I − I

= 50 mA

1.7

250

50

mA

mV

dB

q

I

Dropout Voltage (5.0 V Version)

Load Regulation (5.0 V Version)

Load Regulation (3.3 V Version)

Line Regulation (5.0 V Version)

Line Regulation (3.3 V Version)

Power Supply Ripple Rejection

V

DV

= 100 mA, V = V − V (Note 4)

DR I Q

DR

= 1.0 mA to 100 mA

Q,LO

35

DV

DV = 6.0 V to 28 V, I = 1.0 mA

5.0

4.0

68

Q

I

Q

DV

DV = 4.5 V to 28 V, I = 1.0 mA

I Q

Q

PSRR

f = 100 Hz, V = 0.5 V

r

PP

ENABLE INPUT

Enable Voltage, Output High

V

w V

QMIN

3.5

−

V

EN

Q

Enable Voltage, Output Low (Off)

v 0.1 V

0.8

8.0

Q

Enable Input Current

I

= 5.0 V

−

4.0

mA

EN

THERMAL SHUTDOWN

Thermal Shutdown Temperature*

T

SD

150

−

200

°C

Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product

performancemay not be indicated by the Electrical Characteristics if operated under different conditions.

*Guaranteed by design, not tested in production.

4. 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

3.3 mF

NCV4266−2C

EN

R

L

2

4

I

EN

GND

Figure 2. Applications Circuit

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3

NCV4266−2C

TYPICAL CHARACTERISTICS CURVES − 5 V Version

100

10

1

5.10

V = 13.5 V

R = 1 kW

L

I

Unstable Region

5.05

5.00

Stable Region

0.1

4.95

4.90

C

Q

= 3.3 mF

0.01

0

25

50

75

100

125

150

−40

0

40

80

120

160

I , OUTPUT CURRENT (mA)

Q

T , JUNCTION TEMPERATURE (°C)

J

Figure 3. Output Stability with Output Capacitor ESR

Figure 4. Output Voltage vs. Junction Temperature

6

5

4

3

2

1.0

0.6

0.2

−0.2

R = 6.8 kW

T = 25°C

J

L

R = 33 W

T = 25°C

J

L

−0.6

−1.0

1

0

1

2

3

4

5

6

7

8

9

10

−50 −40 −30 −20 −10

0

10 20 30 40 50

V , INPUT VOLTAGE (V)

I

V , INPUT VOLTAGE (V)

I

Figure 5. Output Voltage vs. Input Voltage

Figure 6. Input Current vs. Input Voltage

450

350

300

250

200

400

350

300

250

200

150

100

T = 125°C

J

T = 25°C

J

150

100

50

V

= 0 V

Q

T = 25°C

J

50

0

5

10

15

20

25

30

35

40

45

0

25

50

75

100

125

150

V , INPUT VOLTAGE (V)

I

I , OUTPUT CURRENT (mA)

Q

Figure 7. Maximum Output Current vs. Input

Voltage

Figure 8. Dropout Voltage vs. Output Current

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4

NCV4266−2C

TYPICAL CHARACTERISTICS CURVES − 5 V Version

3.5

3.0

2.5

2.0

1.5

1.0

0.25

V = 13.5 V

T = 25°C

J

V = 13.5 V

T = 25°C

J

I

0.20

0.15

0.10

0.05

0

0.5

0

25

50

75

100

125

150

0

2

4

6

8

10 12 14 16 18 20

I , OUTPUT CURRENT (mA)

Q

I , OUTPUT CURRENT (mA)

Q

Figure 9. Quiescent Current vs. Output Current

(High Load)

Figure 10. Quiescent Current vs. Output

Current (Low Load)

6

5

4

3

2

1

0

T = 25°C

R = 33 W

L

J

0

5

10

15

20

25

30

35

40

V , INPUT VOLTAGE (V)

I

Figure 11. Quiescent Current vs. Input Voltage

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5

NCV4266−2C

TYPICAL CHARACTERISTICS CURVES − 3.3 V Version

3.36

100

10

1

Unstable Region

3.34

3.32

3.30

Stable Region

3.28

3.26

0.1

V = 13.5 V

R = 660 W

L

I

C

Q

= 3.3 mF

3.24

−40

0.01

0

25

50

75

100

125

150

0

40

80

120

160

I , OUTPUT CURRENT (mA)

Q

T , JUNCTION TEMPERATURE (°C)

J

Figure 12. Output Stability with Output Capacitor

ESR

Figure 13. Output Voltage vs. Junction

Temperature

1.0

0.6

4

3

2

0.2

−0.2

R = 22 W

T = 25°C

J

1

0

L

R = 6.8 kW

T = 25°C

J

L

−0.6

−1.0

0

1

2

3

4

5

6

7

8

9

10

−50 −40 −30 −20 −10

0

10 20 30 40 50

V , INPUT VOLTAGE (V)

I

V , INPUT VOLTAGE (V)

I

Figure 15. Input Current vs. Input Voltage

Figure 14. Output Voltage vs. Input Voltage

5.5

350

300

250

200

150

100

5.0

4.5

4.0

3.5

3.0

2.5

2.0

1.5

1.0

T = 25°C

V

= 0 V

J

Q

50

0

R = 22 W

L

T = 25°C

J

0.5

0

5

10

15

20

25

30

35

40

45

0

5

10

15

20

25

30

35

40

V , INPUT VOLTAGE (V)

I

V , INPUT VOLTAGE (V)

I

Figure 17. Quiescent Current vs. Input Voltage

Figure 16. Maximum Output Current vs. Input

Voltage

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6

NCV4266−2C

TYPICAL CHARACTERISTICS CURVES − 3.3 V Version

0.25

3.5

3.0

2.5

2.0

1.5

1.0

T = 25°C

V = 13.5 V

I

T = 25°C

J

V = 13.5 V

I

0.20

0.15

0.10

0.05

0

0.5

0

25

50

75

100

125

150

0

2

4

6

8

10

12

14 16 18 20

I , OUTPUT CURRENT (mA)

Q

I , OUTPUT CURRENT (mA)

Q

Figure 18. Quiescent Current vs. Output Current

(High Load)

Figure 19. Quiescent Current vs. Output

Current (Low Load)

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7

NCV4266−2C

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 NCV4266−2C 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 Figures 3 and

12 for output stability at various load and Output Capacitor

ESR conditions. Stable region of ESR in Figures 3 and 12

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

five periods after the load change and no oscillation is

further observable.

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.

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.

Enable Input

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

holding the pin down to a voltage less than 0.8 V, the output

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

enable pin is greater than 3.5 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

I1

I2

stabilize the input impedance to avoid voltage line

influences. Using a resistor of approximately 1.0 W in

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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8

NCV4266−2C

Calculating Power Dissipation

Heatsinks

in a Single Output Linear Regulator

The maximum power dissipation for a single output

regulator (Figure 20) 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

D(max)

Q(min) Q(max)

(eq. 1)

) V

I

I(max) q

summed to determine the value of R

:

JA

where

q

(eq. 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

JC

q

appears in the package section of the data sheet.

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

(eq. 2)

R

qJA

+

R

are functions of the package type, heatsink and the

interface between them. These values appear in data sheets

of heatsink manufacturers.

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

less than the calculated value in Equation 2 will keep

Thermal, mounting, and heatsinking considerations are

discussed in the ON Semiconductor application note

AN1040/D.

R

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 20. Single Output Regulator with Key

Performance Parameters Labeled

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9

NCV4266−2C

180

160

140

120

100

1 oz

2 oz

80

60

40

0

100

200

300

400

500

600

700

2

COPPER HEAT SPREADER AREA (mm )

Figure 21. R_q_JAvs. Copper Spreader Area,

SOT−223

1000

100

10

2

Cu Area 100 mm , 1 oz.

1

0.1

0.000001 0.00001

0.0001

0.001

0.01

0.1

1

10

100

1000

PULSE TIME (sec)

Figure 22. Single−Pulse Heating Curve, SOT−223

ORDERING INFORMATION

Device

†

Output Voltage

Package

Shipping

NCV4266−2CST33T3G

3.3 V

SOT−223

(Pb−Free)

4000 / Tape & Reel

NCV4266−2CST50T3G

5.0 V

SOT−223

(Pb−Free)

4000 / Tape & Reel

†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

NCV4266−2C

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

NOM

0.064

0.002

0.030

0.121

0.012

0.256

0.138

0.091

0.037

−−−

4

2

DIM

A

A1

b

b1

c

D

E

e

e1

L

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

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

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

−−−

0.060

0.001

0.024

0.115

0.009

0.249

0.130

0.087

0.033

0.008

0.060

0.264

1

3

b

e1

e

L1

2.00

7.30

0.069

0.276

−

0.078

0.287

C

q

H

E

A

q

0.08 (0003)

A1

L

L1

0°

10°

0°

10°

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

inches

1.5

0.059

ǒ

Ǔ

SCALE 6:1

ON Semiconductor and the

are registered trademarks of Semiconductor Components Industries, LLC (SCILLC) or its subsidiaries in the United States and/or other countries.

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

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

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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

NCV4266−2C/D

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11


型号：	NCV4266-2CST50T3G
厂家：	ONSEMI
描述：	150 mA Low Iq, 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：86K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

NCV4266-2CST50T3G [ONSEMI]

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