ON Semiconductor NCV47721 User Manual

NCV47721

LDO Regulator - Adjustable

Current Limit, Diagnostic Features

3.3 V to 20 V

The NCV47721 LDO regulator with 200 mA output current is designed for use in harsh automotive environments. The device has a high peak input voltage tolerance and reverse input voltage, reverse bias, overcurrent and overtemperature protections. The integrated current sense feature (adjustable by resistor connected to CSO pin) provides diagnosis and system protection functionality. The CSO pin output current creates voltage drop across CSO resistor which is proportional to output current. Extended diagnostic features in OFF state are also available and controlled by dedicated input and output pins.

Features

• Adjustable Output: 3.3 V to 20 V ±3% Output Voltage

• Output Current: up to 200 mA

• Enable Input (3.3 V Logic Compatible)

• Adjustable Current Limit: up to 300 mA

• Protection Features:

♦ Current Limitation ♦ Thermal Shutdown ♦ Reverse Input Voltage and Reverse Bias Voltage

• Diagnostic Features:

♦ Short To Battery (STB) and Open Load (OL) in OFF State ♦ Internal Components for OFF State Diagnostics ♦ Open Collector Flag Output

• AEC−Q100 Grade 1 Qualified and PPAP Capable

• These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS

Compliant

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MARKING DIAGRAM

(Note: Microdot may be in either location)

TSSOP−14 Exposed Pad CASE 948AW

47721 = Specific Device Code A = Assembly Location L = Wafer Lot Y = Year W = Work Week G = Pb−Free Package

NCV4

7721

ALYWG

ORDERING INFORMATION

See detailed ordering and shipping information in the package dimensions section on page 14 of this data sheet.

Typical Applications

• Audio and Infotainment System

• Active Safety System

GND

ADJ

CSO

out

1 µF

Diagnostic Enable Input

NCV47721

Cb*

- is optional for stability with ceramic output capacitor

Figure 1. Application Schematic

September, 2019 − Rev. 1

CSO

1 µF

R1Cb*

To A /D

CSO

Error Flag Output (Open Collector)

10 mF

out

1 Publication Order Number:

NCV47721/D

NCV47721

10 mA

IPU_ON

REF1

REF2

REF_OFF

PD_ON

DIAGNOSTIC

CONTROL

LOGIC

PASS DEVICE

AND

CURRENT MIRROR

STB_OL_OFF

IPU_ON

PD_ON

PD_EN

780k

VOLTAGE

REFERENCE

ENABLE

SATURATION

PROTECTION

THERMAL

SHUTDOWN

PD_DE

780k

STB_OL_OFF

OC_ON

CSO

= I

out

/ 100

REF2

2.55 V

−

0.95x

−

REF2

PD1

500k

−

REF_OFF

1.05 V

REF1

1.265 V

100k

PD2

−

out

CSO

ADJ

GND

Figure 2. Simplified Block Diagram

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NCV47721

411

GND

CSO

EPAD

TSSOP−14 EPAD

Figure 3. Pin Connections (Top Views)

Table 1. PIN FUNCTION DESCRIPTION

Pin No. Pin Name Description

1 NC Not Connected, not internally bonded.

2 NC Not Connected, not internally bonded.

3 NC Not Connected, not internally bonded.

4 GND Power Supply Ground.

5 EN Enable Input; low level disables regulator. (Used also for OFF state diagnostics control.

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

7 V

8 V

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

10 DE Diagnostic Enable Input.

11 EF Error Flag (Open Collector) Output. Active Low.

12 NC Not Connected, not internally bonded.

13 NC Not Connected, not internally bonded.

14 NC Not Connected, not internally bonded.

EPAD EPAD Exposed Pad is connected to Ground. Connect to GND plane on PCB.

out

for more details.

Power Supply Input.

Regulated Output Voltage.

ADJ

out

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NCV47721

Table 2. MAXIMUM RATINGS

Rating Symbol Min Max Unit

Input Voltage DC V

Input Voltage (Note 1)

Load Dump − Suppressed

Enable Input Voltage V

ADJ Input Voltage V

CSO Voltage V

DE, EF Voltages VDE, V

Output Voltage V

Junction Temperature T

Storage Temperature T

ADJ

CSO

STG

out

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. Load Dump Test B (with centralized load dump suppression) according to ISO16750−2 standard. Guaranteed by design. Not tested in production. Passed Class A according to ISO16750−1.

Table 3. ESD CAPABILITY (Note 2)

Rating

ESD Capability, Human Body Model ESD

2. 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) Field Induced Charge Device Model ESD characterization is not performed on plastic molded packages with body sizes < 50 mm to the inability of a small package body to acquire and retain enough charge to meet the minimum CDM discharge current waveform characteristic defined in JEDEC JS−002−2014.

Symbol Min Max Unit

HBM

Table 4. LEAD SOLDERING TEMPERATURE AND MSL (Note 3)

Rating

Moisture Sensitivity Level MSL 1 −

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

Symbol Min Max Unit

THERMAL CHARACTERISTICS (Note 4)

Rating

Thermal Characteristics (single layer PCB)

Thermal Resistance, Junction−to−Air (Note 5) Thermal Reference, Junction−to−Lead (Note 5)

Thermal Characteristics (4 layers PCB)

Thermal Resistance, Junction−to−Air (Note 5) Thermal Reference, Junction−to−Lead (Note 5)

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

5. Values based on copper area of 645 mm

(or 1 in2) of 1 oz copper thickness and FR4 PCB substrate. Single layer − according to JEDEC51.3,

4 layers − according to JEDEC51.7

Symbol Value Unit

θJA

ψJL

θJA

ψJL

Table 5. RECOMMENDED OPERATING RANGES

Rating Symbol Min Max Unit

Input Voltage (Note 6) V

Nominal Output Voltages V

Output Current Limit (Note 7) I

Junction Temperature T

Current Sense Output (CSO) Capacitor C

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.

6. Minimum V

7. Corresponding R

= 4.4 V or (V

CSO

+ 0.5 V), whichever is higher.

out

is in range from 25.5 kW down to 850 W.

out_nom

LIM

CSO

−42 45 V

− 60

−42 45 V

−0.3 10 V

−0.3 7 V

−1 40 V

−40 150 °C

−55 150 °C

−2 2 kV

°C/W

62.6

23.7

°C/W

44.1

16.8

4.4 40 V

3.3 20 V

10 300 mA

−40 150 °C

1 4.7

due

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NCV47721

Table 6. ELECTRICAL CHARACTERISTICS V

Max values are valid for temperature range −40°C v T statistical correlation. Typical values are referenced to T

Parameter

= 13.5 V, VEN = 3.3 V, R

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

= 25°C (Note 8)

CSO

= 0 W, C

= 1 mF, Cin = 1 mF, C

CSO

= 10 mF, Min and

out

Test Conditions Symbol Min Typ Max Unit

REGULATOR OUTPUTS

Output Voltage (Accuracy %) (Note 9)

Vin = V I

= 5 mA to 200 mA

out

Line Regulation (Note 9) Vin = V

= 5 mA

out

Load Regulation Vin = (V

= 5 mA to 200 mA

out

Dropout Voltage (Note 10) V

out_nom

in_min

out_nom

= 5 V, I

= Vin − V

to 40 V

to (V

out_nom

+ 8.5 V)

out

+ 20 V)

= 200 mA

Reg

out

line

load

−3 − +3

− 0.1 1.0

− 0.4 1.4

− 250 500 mV

DISABLE AND QUIESCENT CURRENTS

Disable Current

Quiescent Current, Iq = Iin − I

Quiescent Current, Iq = Iin – I

out

VEN = 0 V I

= 500 mA, Vin = (V

out

= 200 mA, Vin = (V

out

+ 8.5 V) I

out_nom

+ 8.5 V) I

out_nom

DIS

− 0.002 10

− 0.35 1 mA

− 7.5 15 mA

CURRENT LIMIT PROTECTION

Current Limit

Vin = (V

0.9 x V

out

out_nom

+ 8.5 V),

out_nom

LIM

300 − − mA

PSRR & NOISE

Power Supply Ripple Rejection (Note 11)

f = 100 Hz, 0.5 V

p−p

Output Noise Voltage (Note 11) f = 10 Hz to 100 kHz, C

= 10 nF V

PSRR − 80 − dB

− 168 −

rms

ENABLE

Enable Input Threshold Voltage

Logic Low (OFF) Logic High (ON)

0.1 V

out

0.9 x V

out_nom(Vout_nom

= 5 V)

Enable Input Current VEN = 3.3 V I

Turn On Time from Enable ON to 90 % of V

= 100 mA, C

out

= 82 kW, R2 = 27 kW

= 10 nF,

out_nom

th(EN)

0.99

−

1.8

1.9

2 8 20

− 1.6 −

−

2.31

OUTPUT CURRENT SENSE

CSO Voltage Level at Current Limit

CSO Transient Voltage Level

Output Current to CSO Current Ratio (Notes 11 & 12)

Output Current to CSO Current Ratio (Note 12)

CSO Current at no Load Current

= 0.9 x V

out

C I

out

V (V

= 5 V) R

out_nom

= 4.7 mF, R

CSO

pulse from 10 mA to 300 mA, tr = 1 ms

= 2 V, I

CSO

= 5 V)

out_nom

= 2 V, I

CSO

= 5 V)

out_nom

= 0 V, I

CSO

out_nom

out

= 1 kW

CSO

= 1 kW

CSO

= 1 mA to 10 mA

= 10 mA to 300 mA

= 0 mA, (V

out_nom

= 5 V)

CSO_I

CSO

out/ICSO

CSO_off

2.448

lim

(−4%)

− − 3.3

−

(−5%)

−

(−5%)

− − 10

2.55 2.652 (+4%)

98 −

(+5%)

100 −

(+5%)

−

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.

8. 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.

9. Minimum input voltage V

10.Measured when the output voltage V

11.Values based on design and/or characterization.

is 4.4 V or (V

in_min

has dropped by 2% of V

out

+ 1 V) whichever is higher.

out_nom

from the nominal valued obtained at Vin = V

out_nom

[ TJ. Low duty

+ 8.5 V.

out

12.Not guaranteed in dropout.

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