ON Semiconductor NCV4279B Technical data

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NCV4279B

5.0 V Micropower 150 mA
LDO Linear Regulator with
DELAY, Adjustable RESET

,

and Monitor FLAG

The NCV4279B is a 5.0 V precision micropower voltage regulator.

The output current capability is 150 mA.

The output voltage is accurate within ±2.0% with a maximum

dropout voltage of 0.6 V at 150 mA. Low quiescent current is a feature
drawing only 90 A with a 100 A load. This part is ideal for any and
all battery operated microprocessor equipment.

Microprocessor control logic includes an active RESET
DELAY), and a FLAG monitor which can be used to provide an early
warning signal to the microprocessor of a potential impending RESET
signal. The use of the FLAG monitor allows the microprocessor to
finish any signal processing before the RESET shuts the
microprocessor down.

The active RESET

circuit operates correctly at an output voltage as
low as 1.0 V. The RESET function is activated during the power up
sequence or during normal operation if the output voltage drops
outside the regulation limits.

The reset threshold voltage can be decreased by the connection of

external resistor divider to R

ADJ

lead.

The regulator is protected against reverse battery, short circuit, and
thermal overload conditions. The device can withstand load dump
transients making it suitable for use in automotive environments. The
device has also been optimized for EMC conditions.

Features

• 5.0 V ± 2.0% Output

• Low 90 A Quiescent Current

• Active RESET

• Adjustable Reset

• 150 mA Output Current Capability

• Fault Protection

− +60 V Peak Transient Voltage

− −15 V Reverse Voltage

− Short Circuit

− Thermal Overload

• Early Warning through FLAG/MON Leads

• Internally Fused Leads in SO−14 and SO−20L Packages

• NCV Prefix for Automotive and Other Applications Requiring Site

and Control Changes

(with

8

14

20

SO−8

SO−14

SO−20L

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MARKING DIAGRAMS

SO−8

D SUFFIX

1

1

1

CASE 751

SO−14

D SUFFIX

CASE 751A

SO−20L
DW SUFFIX
CASE 751D

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

PIN CONNECTIONS

18

V

IN

R

ADJ

114

ADJ

DELAY

NC

1

ADJ

DELAY

GND
GND

NC

RESET

8

1

14

NCV4279B
AWLYWW

1

20

NCV4279B

AWLYYWW

1

V

OUT

FLAGMON
RESET
GNDDELAY

MONR
V

IN

GNDGND
GNDGND
GNDGND
V

OUT

FLAGRESET

20

MONR
V

IN

NCNC
GNDGND
GND
GND
GNDGND
NCNC
V

OUT

FLAG

4279B
ALYW

 Semiconductor Components Industries, LLC, 2003

August, 2003 − Rev. 1

ORDERING INFORMATION

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

1 Publication Order Number:

NCV4279B/D

NCV4279B

V

BAT

10 µF

C

DELAY

V

IN

NCV4279B

Delay

V

OUT

R

ADJ

MON

R

FLG

10 k

R

RST

10 k

10 µF

V

DD

Microprocessor

FLAG

RESET

GND

Figure 1. Application Diagram

MAXIMUM RATINGS*

V

(DC) −15 to 45 V

IN

Peak Transient Voltage (46 V Load Dump @ VIN = 14 V) 60 V



Rating Value Unit

I/O

I/O

Operating Voltage 45 V
V

(DC) 16 V

OUT

Voltage Range (RESET, FLAG) −0.3 to 10 V
Input Voltage Range (MON) −0.3 to 10 V
ESD Susceptibility (Human Body Model) 2.0 kV
Junction Temperature, T
Storage Temperature, T

J

S

−40 to +150 °C

−55 to 150 °C

Package Thermal Resistance, SO−8:

Junction−to−Case, R

θ

Junction−to−Ambient, R

JC

θ

JA

45

165

Package Thermal Resistance, SO−14 (Fused) Minimum Pad Data:

Junction−to−Case, R

θ

Junction−to−Ambient, R
Junction−to−Pin, R

θ

JP

JC

θ

JA

(Note 3)

15

110

33

Package Thermal Resistance, SO−20L (Fused) Minimum Pad Data:

Junction−to−Case, R

θ

Junction−to−Ambient, R
Junction−to−Pin, R

θ

JP

JC

θ

JA

(Note 4)

12
82
26

Lead Temperature Soldering: Reflow: (SMD styles only) (Notes 1, 2) 240 peak °C

1. 60 second maximum above 183°C.

2. −5°C/+0°C allowable conditions.

3. Measured to pin 9.

4. Measured to pin 12.
*The maximum package power dissipation must be observed.
†During the voltage range which exceeds the maximum tested voltage of V

Thermal dissipation must be observed closely.

, operation is assured, but not specified. Wider limits may apply.

IN

°C/W

°C/W

°C/W

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NCV4279B

ELECTRICAL CHARACTERISTICS (I

= 1.0 mA, −40°C ≤ T

OUT

≤ 125°C; 6.0 V < VIN < 26 V; unless otherwise specified.)

J

Characteristic Test Conditions Min Typ Max Unit

Output Stage

Output Voltage

Dropout Voltage (VIN − V

OUT

) I

9.0 V < VIN < 16 V, 100 A ≤ I

6.0 V < V

OUT

I

OUT

< 26 V, 100 A ≤ I

IN

= 150 mA

= 100 A
Load Regulation VIN = 14 V, 5.0 mA ≤ I
Line Regulation [V
Quiescent Current, (IQ)

Active Mode

(typ) + 1.0] < VIN < 26 V, I

OUT

I

= 100 A, VIN = 12 V, Delay = 3.0 V, MON = 3.0 V

OUT

I

= 75 mA, VIN = 14 V, Delay = 3.0 V, MON = 3.0 V

OUT

≤ 150 mA, VIN = 14 V, Delay = 3.0 V, MON = 3.0 V

I

OUT

OUT

≤ 150 mA

OUT

≤ 150 mA

OUT

4.90

4.85

−

−

5.0

5.0

400
100

5.10

5.15
600

150

≤ 150 mA -30 5.0 30 mV

= 1.0 mA − 15 60 mV

OUT

−

−

−

90

4.0
12

125

6.0
19

Current Limit − 151 300 − mA
Short Circuit Output Current V

= 0 V 40 190 − mA

OUT

Thermal Shutdown (Guaranteed by Design) 150 180 − °C

Reset Function (RESET)

Threshold

RESET

HIGH (V
LOW (V

RL

RH

)

)

V
V

OUT
OUT

Increasing
Decreasing

4.55

4.50

4.70

4.60

0.98 × V

0.97 × V

OUT
OUT

Output Voltage

Low (V

) 1.0 V ≤ V

RLO

OUT

≤ VRL, R

= 10 k − 0.1 0.4 V

RESET

Delay Switching Threshold (VDT) − 1.4 1.8 2.2 V

V
V

mV
mV

A
mA
mA

V
V

Reset Delay Low Voltage V
Delay Charge Current DELAY = 1.0 V, V
Delay Discharge Current DELAY = 1.0 V, V
Reset Adjust Switching Voltage

(V

)

R(ADJ)

< RESET Threshold Low(min) − − 0.1 V

OUT

> V

OUT

RH

= 1.5 V 5.0 − − mA

OUT

1.5 2.5 3.5 A

− 1.23 1.31 1.39 V

FLAG/Monitor

Monitor Threshold

Increasing and Decreasing 1.10 1.20 1.31 V
Hysteresis − 20 50 100 mV
Input Current MON = 2.0 V −0.5 0.1 0.5 A
Output Saturation Voltage MON = 0 V, I

= 1.0 mA − 0.1 0.4 V

FLAG

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PACKAGE PIN DESCRIPTION

Package Pin Number

NCV4279B

SO−8 SO−14 SO−20L

3 1 1 R

Pin Symbol Function

ADJ

Reset Adjust. If not needed connect to ground.
4 2 2 DELAY Timing capacitor for RESET function.
5 3−5, 10−12 4−7, 14−17 GND Ground. All GND leads must be connected to Ground

.

− 6 3, 8, 9, 13, 18 NC No connection.
6 7 10 RESET Active reset (accurate to V

OUT

≥ 1.0 V)
7 8 11 FLAG Open collector output from early warning comparator.
8 9 12 V
1 13 19 V

OUT

IN

±2.0%, 150 mA output.
Input Voltage.

2 14 20 MON Monitor. Input for early warning comparator. If not needed connect to V

TYPICAL PERFORMANCE CHARACTERISTICS

(V)

OUT

V

5.01

5.00

4.99

V
V
I

OUT

OUT
IN

= 5.0 V

= 14 V

= 5.0 mA

1.2

1.0

0.8

0.6

(mA)

Q

I

0.4

+125°C

+25°C

OUT.

VIN = 12 V

−40°C

0.2

4.98

−25 −10 1255 203550658095110

−40
Temperature (°C)

0

0

5 10152025

(mA)

I

OUT

Figure 2. Output Voltage vs. Temperature Figure 3. Quiescent Current vs. Output Current

14

VIN = 12 V

12

10

8

(mA)

Q

I

6

+125°C

+25°C

4

2

0

0

15 30 45 60 14075 90 105 120 135

(mA)

I

OUT

Figure 4. Quiescent Current vs. Output Current

−40°C

7

6

I

= 100 mA

5

OUT

4

(mA)

Q

I

3

I

= 50 mA

2

1

0

6

8101214 2616 18 20 22 24

OUT

I

OUT

V

IN

= 10 mA

(V)

Figure 5. Quiescent Current vs. Input Voltage

T = 25°C

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