ON Semiconductor L4949, NCV4949 Technical data

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L4949, NCV4949

100 mA, 5.0 V, Low Dropout Voltage Regulator with Power-On Reset

The L4949 is a monolithic integrated 5.0 V voltage regulator with a very low dropout and additional functions such as power–on reset and input voltage sense.

It is designed for supplying the micro–computer controlled systems especially in automotive applications.

• Operating DC Supply Voltage Range 5.0 V to 28 V

• Transient Supply Voltage Up to 40 V

• Extremely Low Quiescent Current in Standby Mode

• High Precision Standby Output Voltage 5.0 V ±1%

• Output Current Capability Up to 100 mA

• Very Low Dropout Voltage Less Than 0.4 V

• Reset Circuit Sensing The Output Voltage

• Programmable Reset Pulse Delay With External Capacitor

• Voltage Sense Comparator

• Thermal Shutdown and Short Circuit Protections

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MARKING

DIAGRAMS

PDIP–8

8

1

8

1

N SUFFIX

CASE 626

SO–8

D SUFFIX

CASE 751

8

L4949N AWL YYWW

1

8

L4949

ALYWD

1

Supply

Voltage (V

Sense

CC

Input

(S

A = Assembly Location WL, L = Wafer Lot YY, Y = Year WW, W = Work Week

PIN CONNECTIONS

Representative Block Diagram

Output

2.0 µA

Reset

)

out

C

T

Reset

6

+

2.0 V

Sense

-

+

1.23 V

-

Sense Output

)

(S

o

7

Voltage (V

V

38 4

Z

)

1

)

i

2

V

s

Preregulator

6.0 V

Regulator

1.23 V

ref

V

1

CC

S

2

i

V

3

Z

C

4

T

(Top View)

V

8

out

S

7

o

Reset

6

Gnd

5

ORDERING INFORMATION

See detailed ordering and shipping information in the package dimensions section on page 8 of this data sheet.

 Semiconductor Components Industries, LLC, 2002

April, 2002 – Rev. 4

5

Gnd

1 Publication Order Number:

L4949/D

L4949, NCV4949

Á

ÁÁÁ

ÁÁÁ ÁÁÁ

ÁÁÁ

ABSOLUTE MAXIMUM RATINGS (Absolute Maximum Ratings indicate limits beyond which damage to the device may occur.)

Rating Symbol Value Unit

DC Operating Supply Voltage Transient Supply Voltage (t < 1.0 s) Output Current

ББББББББББББББББББББББ

Output Voltage Sense Input Current Sense Input Voltage Output Voltages

Reset Output Sense Output

Output Currents

Reset Output

Sense Output Preregulator Output Voltage Preregulator Output Current ESD Protection at any pin

Human Body Model

Machine Model Thermal Resistance, Junction–to–Air

P Suffix, DIP–8 Plastic Package, Case 626

D Suffix, SO–8 Plastic Package, Case 751 Maximum Junction Temperature Storage Temperature Range

NOTE: ESD data available upon request.

V

CC

V

CC TR

I

out

ÁÁÁ

V

out

I

SI

V

SI

V

Reset

V

SO

I

Reset

I

SO

V

Z

I

Z

– –

R

θ

JA

T

J

T

stg

28 40

Internally

Limited

ÁÁ

20 ±1.0 V

CC

20

5.0

7.0

5.0

2000

400

100 200

150

–65 to +150

V V –

Á

V

mA

– V

mA

V

mA

V

°C/W

°C °C

ELECTRICAL CHARACTERISTICS (V

= 14 V, –40°C < TJ < 125°C, unless otherwise specified.)

CC

Characteristic

Output Voltage (TJ = 25°C, I Output Voltage (6.0 V < VCC < 28 V, 1.0 mA < I Output Voltage (VCC = 35 V, t < 1.0 s, 1.0 mA < I

= 1.0 mA)

out

< 50 mA)

out

< 50 mA)

Dropout Voltage

I

= 10 mA

out

I

= 50 mA

out

I

= 100 mA

out

Input to Output Voltage Difference in Undervoltage Condition

(VCC = 4.0 V, I Line Regulation (6.0 V < VCC < 28 V, I Load Regulation (1.0 mA < I

= 35 mA)

out

< 100 mA)

out

= 1.0 mA)

out

Current Limit

V

= 4.5 V

out

V

= 0 V

out

Quiescent Current (I Quiescent Current (I

= 0.3 mA, TJ < 100°C)

out

= 100 mA)

out

Symbol Min Typ Max Unit

V V V

V

Reg

I

out out out

drop

V

IO

I

Lim

QSE

I

Q

line

load

4.95

4.9

– – –

–

– –

105

– – –

5.0

0.1

0.2

0.3

0.2

1.0

8.0

200 100

150

–

5.05

5.1

0.25

0.40

0.50

0.4

20 30

400

–

260

5.0

V V V V

V

mV mV mA

µA

mA

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L4949, NCV4949

ÁÁÁ

ÁÁÁ ÁÁÁ

ÁÁÁ

ÁÁÁ ÁÁÁ

ÁÁÁ

ELECTRICAL CHARACTERISTICS (continued) (V

= 14 V, –40°C < TJ < 125°C, unless otherwise specified.)

CC

Characteristic UnitMaxTypMinSymbol

RESET

Reset Threshold Voltage Reset Threshold Hysteresis

@ TJ = 25°C

@ TJ = –40 to +125°C Reset Pulse Delay (CT = 100 nF, tR ≥ 100 µs) Reset Reaction Time (CT = 100 nF) Reset Output Low Voltage (R Reset Output High Leakage Current (V

= 10 kΩ to V

Reset

, VCC ≥ 3.0 V)

out

= 5.0 V) Delay Comparator Threshold Delay Comparator Threshold Hysteresis

SENSE

Sense Low Threshold (VSI Decreasing = 1.5 V to 1.0 V) Sense Threshold Hysteresis Sense Output Low Voltage (VSI ≤ 1.16 V, VCC ≥ 3.0 V, RSO = 10 kΩ to V Sense Output Leakage (VSO = 5.0 V, VSI ≥ 1.5 V) Sense Input Current

PREREGULATOR

Preregulator Output Voltage (IZ = 10 µA)

out

V

Resth

V

Resth,hys

t

ResD

t

ResR

V

ResL

I

ResH

V

CTth

V

CTth, hys

V

SOth

V

SOth,hys

)

V

I

SOL

SOH

I

SI

V

Z

–

50 50

55

– – – – –

1.16 20

– –

–1.0

–

V

out

– 0.5

–

V

mV

100

–

100

5.0 – –

2.0

100

1.23 100

– –

0.1

6.3

200 300

180

30

0.4

1.0 – –

1.35 200

0.4

1.0

–

ms

µs

V

µA

V

mV

V

mV

V

µA µA

V

1 2 3 4 5 6 7 8

5.04

5.02

5.0

, OUTPUT VOLTAGE (V)

4.98

out

V

Symbol

V

CC

S

i

V

Z

C

T

Gnd Reset S

O

V

out

VCC = 14 V I

= 1.0 mA

out

PIN FUNCTION DESCRIPTION

Description

Supply Voltage Input of Sense Comparator Output of Preregulator Reset Delay Capacitor Ground Output of Reset Comparator Output of Sense Comparator Main Regulator Output

TYPICAL CHARACTERIZATION CURVES

6.0

5.0

4.0

3.0

2.0

, OUTPUT VOLTAGE (V)

out

V

1.0

T

J

= 25°C

RL = 5.0 k

R

L

= 100 Ω

4.96

-40 -20 0 40 6020 100 120

T

, JUNCTION TEMPERATURE (°C)

J

80

Figure 1. Output Voltage versus

Junction Temperature

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0

010

2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0

1.0

V

, SUPPLY VOLTAGE (V)

CC

Figure 2. Output Voltage versus

Supply Voltage

3

L4949, NCV4949

TYPICAL CHARACTERIZATION CURVES (continued)

250

T

= 25°C

J

200

150

100

, DROPOUT VOLTAGE (mV)

50

drop

V

0

0.1 100

I

, OUTPUT CURRENT (mA)

out

101.0

Figure 3. Dropout Voltage versus

Output Current

3.0

VCC = 14 V

2.5 T

= 25°C

J

2.0

0.40

I

= 100 mA

0.30

0.20

, DROPOUT VOLTAGE (mV)

0.10

drop

V

0

-40 -20 0 40 6020 100 120

T

, JUNCTION TEMPERATURE (°C)

J

out

I

out

I

out

= 50 mA

= 10 mA

80

Figure 4. Dropout Voltage versus

Junction Temperature

3.0

T

2.5

2.0

= 25°C

J

1.5

1.0

, QUIESCENT CURRENT (mA)

Q

0.5

I

0

0.1 1.0 10 100

, OUTPUT CURRENT (mA)

I

out

Figure 5. Quiescent Current versus

Output Current

6.0 T

= 25°C

J

5.0

Resistor 10 k from Reset Output

4.0

to 5.0 V

3.0

, RESET OUTPUT (V)

2.0

Reset

V

1.0

0

4.0 4.1

4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 5.0

, OUTPUT VOLTAGE (V)

V

out

Figure 7. Reset Output versus

Regulator Output Voltage

R

1.5

= 100 Ω

L

1.0

, QUIESCENT CURRENT (mA)

Q

0.5

I

0

0 5.0 10 15 20 25 30

, SUPPLY VOLTAGE (V)

V

CC

RL = 5.0 k

Figure 6. Quiescent Current versus

Supply Voltage

4.7

4.66 Upper Threshold

4.62

4.58

4.54

4.5

, RESET THRESHOLD VOLTAGE (V)

Lower Threshold

4.46

Reset

V

4.42

-40 -20

0 20 40 60 80 100 120

T

, JUNCTION TEMPERATURE (°C)

J

Figure 8. Reset Thresholds versus

Junction Temperature

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L4949, NCV4949

TYPICAL CHARACTERIZATION CURVES (continued)

6.0

T

= 25°C

5.0

J

4.0

Resistor 10 k from Sense Output to 5.0 V

3.0

2.0

, SENSE OUTPUT VOLTAGE (V)

1.0

SO

V

0

1.0 1.15

1.11.05

1.2 1.25 1.3 1.35 1.4 1.45 1.5

, SENSE INPUT VOLTAGE (V)

V

SI

Figure 9. Sense Output versus

Sense Input Voltage

APPLICATION INFORMATION

Supply Voltage Transient

High supply voltage transients can cause a reset output signal perturbation. For supply voltages greater than 8.0 V the circuit shows a high immunity of the reset output against supply transients of more than 100 V/µs. For supply voltages

1.4

1.38

1.36

1.34

1.32

1.3

1.28

, SENSE INPUT VOLTAGE (V)

1.24

SI

V

1.22

1.2

Upper Threshold

Lower Threshold1.26

-40 -20

0 20 40 60 80 100 120

T

, JUNCTION TEMPERATURE (°C)

J

Figure 10. Sense Thresholds versus

Junction Temperature

less than 8.0 V supply transients of more than 0.4 V/µs can cause a reset signal perturbation. To improve the transient behavior for supply voltages less than 8.0 V a capacitor at Pin 3 can be used. A capacitor at Pin 3 (C3 ≤ 1.0 µF) reduces also the output noise.

V

out

Reset

C

O

2.0 µA

Sense

C

T

Reset

6

10 kΩ

+

2.0 V

-

R

SO

7

+

1.23 V

-

10 kΩ

V

out

S

o

C3

V

Z

(optional)

V

bat

V

CC

1

C

s

V

S

i

2

CC

Preregulator

Regulator

1.23 V

6.0 V

ref

38 4

NOTES: 1. For stability: Cs ≥ 1.0 µF, CO ≥ 4.7 µF, ESR < 10 Ω at 10 kHz

2. Recommended for application: C

= CO = 10 µF

s

Figure 11. Application Schematic

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Gnd

5

L4949, NCV4949

OPERATING DESCRIPTION

The L4949 is a monolithic integrated low dropout voltage regulator. Several outstanding features and auxiliary functions are implemented to meet the requirements of supplying microprocessor systems in automotive applications. Nevertheless, it is suitable also in other applications where the present functions are required. The modular approach of this device allows the use of other features and functions independently when required.

Voltage Regulator

The voltage regulator uses an isolated Collector Vertical PNP transistor as a regulating element. With this structure, very low dropout voltage at currents up to 100 mA is obtained. The dropout operation of the standby regulator is maintained down to 3.0 V input supply voltage. The output voltage is regulated up to the transient input supply voltage of 35 V. With this feature no functional interruption due to overvoltage pulses is generated.

The typical curve showing the standby output voltage as a function of the input supply voltage is shown in Figure 13.

The current consumption of the device (quiescent current) is less than 200 µA.

To reduce the quiescent current peak in the undervoltage region and to improve the transient response in this region, the dropout voltage is controlled. The quiescent current as a function of the supply input voltage is shown in Figure 14.

Short Circuit Protection:

The maximum output current is internally limited. In case of short circuit, the output current is foldback current limited as described in Figure 12.

10

V

out

V

5.0 V

out

V

CC

Figure 13. Output Voltage versus Supply Voltage

3.0

T

2.5

2.0

1.5

1.0

, QUIESCENT CURRENT (mA)

Q

0.5

I

0

0 5.0 10 15 20 25 30

= 25°C

J

V

, SUPPLY VOLTAGE (V)

CC

R

= 100 Ω

L

RL = 5.0 k

Figure 14. Quiescent Current versus Supply Voltage

35 V5.0 V2.0 V0 V

(V)

5.0

out

V

0

20 100 200

(mA)

I

out

Figure 12. Foldback Characteristic of V

out

Preregulator

To improve the transient immunity a preregulator stabilizes the internal supply voltage to 6.0 V. This internal voltage is present at Pin 3 (V

). This voltage should not be

Z

used as an output because the output capability is very small (≤ 100 µA).

This output may be used as an option when better transient behavior for supply voltages less than 8.0 V is required. In this case a capacitor (100 nF – 1.0 µF) must be connected between Pin 3 and Gnd. If this feature is not used Pin 3 must be left open.

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6

L4949, NCV4949

Reset Circuit

The block circuit diagram of the reset circuit is shown in

Figure 15.

The reset circuit supervises the output voltage. The reset threshold of 4.5 V is defined with the internal reference voltage and standby output divider.

The reset pulse delay time t time of an external capacitor C

t



RD

, is defined with the charge

RD

:

T

CTx2.0V

2.0 A

The reaction time of the reset circuit originates from the discharge time limitation of the reset capacitor CT and is proportional to the value of CT. The reaction time of the reset circuit increases the noise immunity.

1.23 V V

ref

Out

Reg

22 k

2.0 µA

C

T

+

-

Figure 15. Reset Circuit

2.0 V

Reset

Standby output voltage drops below the reset threshold only a bit longer than the reaction time results in a shorter reset delay time.

The nominal reset delay time will be generated for standby output voltage drops longer than approximately 50 µs. The typical reset output waveforms are shown in Figure 16.

V

5.0 V

VRT + 0.1 V

UKT

3.0 V

Reset

out

Switch On Input Drop Dump

V

in

V

out1

t

RD

t

RR

Figure 16. Typical Reset Output Waveforms

Sense Comparator

40 V

t

R

t

RD

Output

Overload

Switch Off

The sense comparator compares an input signal with an internal voltage reference of typical 1.23 V. The use of an external voltage divider makes this comparator very flexible in the application.

It can be used to supervise the input voltage either before or after the protection diode and to give additional information to the m icroprocessor like l ow v oltage warnings.

t

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L4949, NCV4949

ORDERING INFORMATION

Device Operating Temperature Range Package Shipping

L4949N DIP–8 50 Units / Rail L4949D L4949DR2 NCV4949DR2* SO–8 2500 Units / Tape & Reel

*NCV4949: T

site and change control.

= –40°C, T

low

= +125°C. Guaranteed by design. NCV prefix is for automotive and other applications requiring

high

TJ = –40°C to +125°C

SO–8 98 Units / Rail SO–8 2500 Units / Tape & Reel

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8

NOTE 2

–T–

SEATING PLANE

H

58

–B–

14

F

–A–

C

N

D

G

0.13 (0.005) B

L4949, NCV4949

PACKAGE DIMENSIONS

N SUFFIX

PLASTIC PACKAGE

CASE 626–05

ISSUE L

NOTES:

1. DIMENSION L TO CENTER OF LEAD WHEN FORMED PARALLEL.

2. PACKAGE CONTOUR OPTIONAL (ROUND OR SQUARE CORNERS).

3. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982.

DIM MIN MAX MIN MAX

A 9.40 10.16 0.370 0.400 B 6.10 6.60 0.240 0.260 C 3.94 4.45 0.155 0.175 D 0.38 0.51 0.015 0.020

L

J

K

M

A

T

M

F 1.02 1.78 0.040 0.070 G 2.54 BSC 0.100 BSC H 0.76 1.27 0.030 0.050 J 0.20 0.30 0.008 0.012 K 2.92 3.43 0.115 0.135 L 7.62 BSC 0.300 BSC M --- 10 --- 10 N 0.76 1.01 0.030 0.040

INCHESMILLIMETERS



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L4949, NCV4949

PACKAGE DIMENSIONS

D SUFFIX

PLASTIC PACKAGE

CASE 751–07

ISSUE W

–Y–

–Z–

–X–

A

58

B

1

S

0.25 (0.010)

4

M

Y

K

G

C

SEATING PLANE

0.10 (0.004)

H

D

0.25 (0.010) Z

M

Y

SXS

N

X 45



M

NOTES:

1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982.

2. CONTROLLING DIMENSION: MILLIMETER.

3. DIMENSION A AND B DO NOT INCLUDE MOLD PROTRUSION.

4. MAXIMUM MOLD PROTRUSION 0.15 (0.006) PER SIDE.

5. DIMENSION D DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE 0.127 (0.005) TOTAL IN EXCESS OF THE D DIMENSION AT MAXIMUM MATERIAL CONDITION.

MILLIMETERS

DIMAMIN MAX MIN MAX

4.80 5.00 0.189 0.197

B 3.80 4.00 0.150 0.157 C 1.35 1.75 0.053 0.069 D 0.33 0.51 0.013 0.020

G 1.27 BSC 0.050 BSC

H 0.10 0.25 0.004 0.010

J

J 0.19 0.25 0.007 0.010 K 0.40 1.27 0.016 0.050

M 0 8 0 8



N 0.25 0.50 0.010 0.020 S 5.80 6.20 0.228 0.244

INCHES

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Notes

L4949, NCV4949

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L4949, NCV4949

ON Semiconductor is a trademark and is a registered trademark of Semiconductor Components Industries, LLC (SCILLC). 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.

PUBLICATION ORDERING INFORMATION

Literature Fulfillment:

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: ONlit@hibbertco.com

N. American Technical Support: 800–282–9855 Toll Free USA/Canada

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JAPAN: ON Semiconductor, Japan Customer Focus Center

4–32–1 Nishi–Gotanda, Shinagawa–ku, Tokyo, Japan 141–0031

Phone: 81–3–5740–2700 Email: r14525@onsemi.com

ON Semiconductor Website: http://onsemi.com

For additional information, please contact your local Sales Representative.

L4949/D

12

ON Semiconductor L4949, NCV4949 Technical data

Specifications and Main Features

Frequently Asked Questions

User Manual