ON Semiconductor NCV47551 User Manual

NCV47551

LDO Regulator - Adjustable,

Low Noise, Adjustable
Current

3.3 V to 20 V

The NCV47551 is a low noise low output current integrated low
dropout regulator designed for use in harsh automotive environments.
It includes wide operating temperature and input voltage ranges. The
device is offered with adjustable voltage versions available in 3%
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 for control of the
state of the output voltage. The integrated current sense feature
provides diagnosis and system protection functionality. The current
limit of the device is adjustable by resistor connected to CSO pin.
Voltage on CSO pin is proportional to output current.

Features

• Adjustable Voltage Version (from 3.3 V to 20 V) ± 3% Output

Voltage

• Enable Input (3.3 V Logic Compatible Thresholds)

• Adjustable Current Limit (from 100 mA to 20 mA) with 10%

Accuracy

• Protection Features:

♦ Current Limitation
♦ Thermal Shutdown
♦ Reverse Input Voltage

• This is a Pb−Free Device

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MARKING
DIAGRAM

8

8

1

47551 = Specific Device Code
A = Assembly Location
L = Wafer Lot
Y = Year
W = Work Week
G = Pb−Free Package

SOIC−8

SUFFIX D

CASE 751

47551
ALYW

G

1

ORDERING INFORMATION

See detailed ordering and shipping information in the package
dimensions section on page 11 of this data sheet.

Typical Applications

• Microphone Power Supply

• Audio and Infotainment System

• Navigation

• Satellite Radio

V

C

in

1 mF

C

*

noise

C

*, C

* − Optional for noise reduction.

b

noise

© Semiconductor Components Industries, LLC, v2013

September, 2019 − Rev. 0

in

EN

NR

NCV47551

GND

Figure 1. Application Schematic

(See Application Section for more details)

V

ADJ

CSO

out

C

CSO

1 mF

Cb*

R

1

C

out

R

2

10 mF

R

CSO

1 Publication Order Number:

NCV47551/D

NCV47551

V

EN

NR

GND

in

V

NR

VOLTAGE

REFERENCE

ENABLE

SATURATION

PROTECTION

THERMAL

SHUTDOWN

NOISE

REDUCTION

V

SP

TSD

NR

REF1

REF2

PASS DEVICE

AND

CURRENT MIRROR

SP

TSD

= I

I

CSO

out

(Ratio 1:1)

V

REF2

+

2.55 V

−

V

REF1

+

1.265 V

−

V

out

CSO

ADJ

Figure 2. Simplified Block Diagram

18

ADJ

GND

EN

CSO

V

NC

NR

V

out

in

SOIC−8

Figure 3. Pin Connections

(Top View)

PIN FUNCTION DESCRIPTION

Pin No.

SOIC−8

Pin Name Description

1 ADJ Adjustable Voltage Setting Input. See Application Section for more details.

2 GND Power Supply Ground.

3 EN Enable Input; low level disables the IC.

4 CSO Current Sense Output, Current Limit setting and Output Current value information. See Application Section

for more details.

5 V

in

Positive Power Supply Input.

6 NR Noise Reduction Input. Connect either external capacitor for decreasing noise or must be left unconnected.

7 NC Not Connected.

8 V

out

Regulated Output Voltage.

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2

NCV47551

ABSOLUTE MAXIMUM RATINGS

Rating Symbol Min Max Unit

Input Voltage DC V

Enable Input Voltage V

Adjustable Input Voltage V

CSO Voltage V

Noise Reduction Input Voltage V

Output Voltage V

Junction Temperature T

Storage Temperature T

in

EN

ADJ

CSO

NR

out

J

STG

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.

ESD CAPABILITY (Note 1)

Rating

ESD Capability, Human Body Model ESD

ESD Capability, Machine Model ESD

1. This device series incorporates ESD protection and is tested by the following methods:

ESD Human Body Model tested per AEC−Q100−002 (JS−001−2010)
ESD Machine Model tested per AEC−Q100−003 (EIA/JESD22−A115)

Symbol Min Max Unit

HBM

MM

−42 45 V

−42 45 V

−0.3 10 V

−0.3 7 V

−0.3 7 V

−1 40 V

−40 150 °C

−55 150 °C

−2 2 kV

−200 200 V

LEAD SOLDERING TEMPERATURE AND MSL (Note 2)

Rating

Moisture Sensitivity Level MSL 1 −

Lead Temperature Soldering

Reflow (SMD Styles Only), Pb−Free Versions

2. For more information, please refer to our Soldering and Mounting Techniques Reference Manual, SOLDERRM/D

Symbol Min Max Unit

°C

T

SLD

− 265 peak

THERMAL CHARACTERISTICS (Note 3)

Rating Symbol Value Unit

Thermal Characteristics

Thermal Resistance, Junction−to−Air (Note 4)
Thermal Reference, Junction−to−Lead (Note 4)

3. Refer to ELECTRICAL CHARACTERISTICS and APPLICATION INFORMATION for Safe Operating Area.

4. Values based on copper area of 645 mm

2

(or 1 in2) of 1 oz copper thickness and FR4 PCB substrate.

R

θJA

R

ψJL

133

76

°C/W

RECOMMENDED OPERATING RANGES

Rating Symbol Min Max Unit

Input Voltage (Note 5) V

Nominal Output Voltage V

Output Current Limit (Note 6) I

Junction Temperature T

in

out_nom

LIM

J

Functional operation above the stresses listed in the Recommended Operating Ranges is not implied. Extended exposure to stresses beyond
the Recommended Operating Ranges limits may affect device reliability.

5. Minimum V

6. Corresponding R

= 4.4 V or (V

in

is in range from 25.5 kW down to 127.5 W.

CSO

+ 1 V), whichever is higher.

out_nom

4.4 40 V

3.3 20 V

0.1 20 mA

−40 150 °C

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NCV47551

ELECTRICAL CHARACTERISTICS V

and Max values are valid for temperature range −40°C ≤ T
statistical correlation. Typical values are referenced to T
resistor divider R

and R2. (Note 7)

1

Parameter

= 13.5 V, VEN = 3.3 V, R

in

≤ +150°C unless noted otherwise and are guaranteed by test, design or

J

= 25°C. Output Current I

J

CSO

= 0 W, C

= 1 mF, Cin = 1 mF, C

CSO

is the current out of pin including current through the

out

= 10 mF, ESR = 1.5 W, Min

out

Test Conditions Symbol Min Typ Max Unit

REGULATOR OUTPUT

Output Voltage (Accuracy %)
(Note 8)

Line Regulation (Note 8) Vin = V

Load Regulation I

Dropout Voltage (Note 9) I

Vin = V
I

= 0.1 mA to 20 mA

out

I

= 0.1 mA

out

= 0.1 mA to 20 mA

out

V

= (V

in

= 10 mA, V

out

V

DO

in_min

in_min

out_nom

= Vin − V

to 40 V

to (V

out

out_nom

+ 8.5 V)

out_nom

+ 20 V)

= 5 V

V

Reg

Reg

V

out

DO

line

load

−3 − +3 %

− 0.1 1.0 %

− 0.2 1.4 %

− 210 500 mV

DISABLE AND QUIESCENT CURRENTS

Disable Current

Quiescent Current, Iq = Iin − I

Quiescent Current, Iq = Iin − I

VEN = 0 V I

outIout

outIout

= 0.1 mA, Vin = (V

= 1 mA, Vin = (V

out_nom

+ 8.5 V) I

out_nom

+ 8.5 V) I

DIS

− 0.075 10

q

q

− 265 380

− 1.45 3 mA

mA

mA

CURRENT LIMIT PROTECTION

Current Limit

=

V

out

0.9 x V

out_nom

, Vin = (V

+ 8.5 V) I

out_nom

LIM

20 − 50 mA

PSRR AND NOISE

Power Supply Ripple Rejection
(Note 10)

Output Noise Voltage (Note 10)

I

= 1 mA, R1 = 82 kW, R2 = 27 kW

out

C

= none, Cb = 10 nF, C

in

f = 100 Hz, 0.5 V
f = 1 kHz, 0.5 V

I

= 1 mA, R1 = 82 kW, R2 = 27 kW, Cb = 10 nF

out

f = 10 Hz to 100 kHz, C

p−p

p−p

f = 10 Hz to 100 kHz, C
f = 20 Hz to 20 kHz, C

noise
noise

noise

noise

= none
= 10 nF

= 10 nF

= 10 nF

PSRR

V

n

dB

−

−

−

−

−

85
90

60
23
20

−

mV

−

rms

−

−

ENABLE

Enable Input Threshold Voltage

Logic Low (OFF)
Logic High (ON)

V

out

V

out

≤ 0.1 V
≥ 0.9 x V

out_nom

Enable Input Current VEN = 3.3 V I

Turn On Time

from ENABLE ON to
90% of V

out_nom

I

= 1 mA

out

= 82 kW, R2 = 27 kW

R

1

= 10 nF, C

C

b

noise

= 10 nF

V

th(EN)

EN

t

on

0.99

−

1.8

1.9

−

2.31

2 8 20

− 2.8 − ms

V

mA

Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product
performance may not be indicated by the Electrical Characteristics if operated under different conditions.

7. Performance guaranteed over the indicated operating temperature range by design and/or characterization tested at T
cycle pulse techniques are used during testing to maintain the junction temperature as close to ambient as possible.

8. V

9. Measured when the output voltage V

= 4.4 V or (V

in_min

10.Values based on design and/or characterization.

+ 1 V), whichever is higher.

out_nom

out

has dropped – 2% from the nominal value obtained at Vin = V

out_nom

+ 8.5 V.

≈ TJ. Low duty

A

11.Not guaranteed in dropout.

current at no load includes also mirrored current of resistor divider (I

12.I

CSO

div

= V

out

/ (R1 + R2)).

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4

NCV47551

ELECTRICAL CHARACTERISTICS V

and Max values are valid for temperature range −40°C ≤ T
statistical correlation. Typical values are referenced to T
resistor divider R

and R2. (Note 7)

1

= 13.5 V, VEN = 3.3 V, R

in

≤ +150°C unless noted otherwise and are guaranteed by test, design or

J

= 25°C. Output Current I

J

CSO

= 0 W, C

= 1 mF, Cin = 1 mF, C

CSO

is the current out of pin including current through the

out

= 10 mF, ESR = 1.5 W, Min

out

Parameter UnitMaxTypMinSymbolTest Conditions

OUTPUT CURRENT SENSE

CSO Voltage Level at Current
Limit

CSO Transient Voltage Level

Output Current to CSO Current
Ratio (Note 11)

CSO Current at no Load Current
(Note 12)

V

= 0.9 x V

out

= 220 W

R

CSO

C

= 4.7 mF, R

CSO

pulse from 0.1 mA to 20 mA, tr = 1 ms

I

out

V

= 2 V

CSO

I

= 0.1 mA to 20 mA, (V

out

V

= 0 V

CSO

= 82 kW, R2 = 27 kW, Cb = 10 nF

R

1

out_nom

CSO

, (V

out_nom

= 220 W

out_nom

= 5 V)

= 5 V)

V

CSO_Ilim

V

CSO

I

out/ICSO

I

CSO_off

2.346

(−8 %)

2.55 2.754
(+8 %)

− − 3.3 V

−

(−10%)

(1/1) −

(+10%)

− 47 60

V

−

mA

THERMAL SHUTDOWN

Thermal Shutdown Temperature
(Note 10)

I

= 1 mA T

out

SD

150 − 195 °C

Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product
performance may not be indicated by the Electrical Characteristics if operated under different conditions.

7. Performance guaranteed over the indicated operating temperature range by design and/or characterization tested at T
cycle pulse techniques are used during testing to maintain the junction temperature as close to ambient as possible.

8. V

9. Measured when the output voltage V

= 4.4 V or (V

in_min

10.Values based on design and/or characterization.

+ 1 V), whichever is higher.

out_nom

out

has dropped – 2% from the nominal value obtained at Vin = V

out_nom

+ 8.5 V.

≈ TJ. Low duty

A

11.Not guaranteed in dropout.

current at no load includes also mirrored current of resistor divider (I

12.I

CSO

div

= V

out

/ (R1 + R2)).

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