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

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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

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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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