NCP145AMX105TCG - APTINA IMAGING

September, 2019 − Rev. 3

1Publication Order Number:

NCP145/D

Voltage Regulator, Bias Rail

CMOS, Very Low Dropout,

500 mA

NCP145

The NCP145 is a 500 mA VLDO equipped with NMOS pass

transistor and a separate bias supply voltage (VBIAS). The device

provides very stable, accurate output voltage with low noise suitable

for space constrained, noise sensitive applications. In order to

optimize performance for battery operated portable applications, the

NCP145 features low IQ consumption. The XDFN4 1.2 mm x 1.2 mm

package is optimized for use in space constrained applications.

Features

•Input Voltage Range: 1.0 V to 5.5 V

•Bias Voltage Range: 2.4 V to 5.5 V

•Fixed Voltage Versions Available

•Output Voltage Range: 1.0 V to 1.8 V (Fixed)

•±1.5% Accuracy over Temperature, 0.5% VOUT @ 25°C

•Ultra−Low Dropout: Typ. 140 mV at 500 mA

•Very Low Bias Input Current of Typ. 80 mA

•Very Low Bias Input Current in Disable Mode: Typ. 0.5 mA

•Logic Level Enable Input for ON/OFF Control

•Output Active Discharge Option Available

•Stable with a 2.2 mF Ceramic Capacitor

•Available in XDFN4 − 1.2 mm x 1.2 mm x 0.4 mm Package

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

Compliant

Typical Applications

•Battery−powered Equipment

•Smartphones, Tablets

•Cameras, DVRs, STB and Camcorders

BIAS

OUT

GND

2.2 mF

VOUT

1 V up to 500 mA

VBIAS

>2.7 V

VIN

1.5 V

VEN

1 mF

100 nF

NCP145

Figure 1. Typical Application Schematics

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See detailed ordering, marking and shipping information on

page 10 of this data sheet.

ORDERING INFORMATION

MARKING

DIAGRAM

XDFN4

CASE 711BC

PIN CONNECTIONS

(Top View)

IN EN

OUT BIAS

GND

XX = Specific Device Code

M = Date Code

XXM

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CURRENT

LIMIT

THERMAL

LIMIT

UVLO

−

VOLTAGE

REFERENCE

BIAS

GND

OUT

*Active

DISCHARGE

ENABLE

BLOCK

*Active output discharge function is present only in NCP145AMXyyyTCG and NCP145CMXyyyTCG devices.

yyy denotes the particular output voltage option.

Figure 2. Simplified Schematic Block Diagram

150 W

NCP145

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PIN FUNCTION DESCRIPTION

Pin No.

XDFN4 Pin Name Description

1 OUT Regulated Output Voltage pin

2 BIAS Bias voltage supply for internal control circuits. This pin is monitored by internal Under-Voltage

Lockout Circuit.

3 EN Enable pin. Driving this pin high enables the regulator. Driving this pin low puts the regulator into

shutdown mode.

4 IN Input Voltage Supply pin

5 GND Ground

ABSOLUTE MAXIMUM RATINGS

Rating Symbol Value Unit

Input Voltage (Note 1) VIN −0.3 to 6 V

Output Voltage VOUT −0.3 to (VIN+0.3) ≤ 6 V

Chip Enable, Bias Input VEN, VBIAS −0.3 to 6 V

Output Short Circuit Duration tSC unlimited s

Maximum Junction Temperature TJ150 °C

Storage Temperature TSTG −55 to 150 °C

ESD Capability, Human Body Model (Note 2) ESDHBM 2000 V

ESD Capability, Machine Model (Note 2) ESDMM 200 V

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

2. This device series incorporates ESD protection (except OUT pin) and is tested by the following methods:

ESD Human Body Model tested per EIA/JESD22−A114

ESD Machine Model tested per EIA/JESD22−A115

Latchup Current Maximum Rating tested per JEDEC standard: JESD78.

THERMAL CHARACTERISTICS

Rating Symbol Value Unit

Thermal Characteristics, XDFN4 1.2 mm x 1.2 mm

Thermal Resistance, Junction−to−Air (Note 3)

RqJA 170 °C/W

3. This data was derived by thermal simulations for a single device mounted on the 40 mm x 40 mm x 1.6 mm FR4 PCB with 2−ounce 800 sq

mm copper area on top and bottom.

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ELECTRICAL CHARACTERISTICS −40°C ≤ TJ ≤ 85°C; VBIAS = 2.7 V or (VOUT + 1.6 V), whichever is greater, VIN = VOUT(NOM) +

0.3 V, IOUT = 1 mA, VEN = 1 V, unless otherwise noted. CIN = 1 mF, COUT = 2.2 mF, CBIAS = 0.1 mF. Typical values are at TJ = +25°C.

Min/Max values are for −40°C ≤ TJ ≤ 85°C unless otherwise noted. (Note 4)

Parameter Test Conditions Symbol Min Typ Max Unit

Operating Input Voltage

Range

VIN VOUT +

VDO

5.5 V

Operating Bias Voltage

Range

VBIAS (VOUT +

1.40) ≥ 2.4

5.5 V

Undervoltage Lock−out VBIAS Rising

Hysteresis

UVLO 1.6

0.2

Output Voltage Accuracy VOUT ±0.5 %

Output Voltage Accuracy −40°C ≤ TJ ≤ 85°C, VOUT(NOM) + 0.3 V ≤ VIN ≤

VOUT(NOM) + 1.0 V, 2.7 V or (VOUT(NOM) +

1.6 V), whichever is greater < VBIAS < 5.5 V,

1 mA < IOUT < 500 mA

VOUT −1.5 +1.5 %

VIN Line Regulation VOUT(NOM) + 0.3 V ≤ VIN ≤ 5.0 V LineReg 0.01 %/V

VBIAS Line Regulation 2.7 V or (VOUT(NOM) + 1.6 V), whichever is

greater < VBIAS < 5.5 V

LineReg 0.01 %/V

Load Regulation IOUT = 1 mA to 500 mA LoadReg 1.5 mV

VIN Dropout Voltage IOUT = 150 mA (Note 5) VDO 37 75 mV

IOUT = 500 mA (Note 5) VDO 140 250

VBIAS Dropout Voltage IOUT = 500 mA, VIN = VBIAS (Note 5) VDO 1.1 1.5 V

Output Current Limit VOUT = 90% VOUT(NOM) ICL 550 800 1000 mA

Bias Pin Operating Current VBIAS = 2.7 V IBIAS 80 110 mA

Bias Pin Disable Current VEN ≤ 0.4 V IBIAS(DIS) 0.5 1 mA

Vinput Pin Disable Current VEN ≤ 0.4 V IVIN(DIS) 0.5 1 mA

EN Pin Threshold Voltage EN Input Voltage “H” VEN(H) 0.9 V

EN Input Voltage “L” VEN(L) 0.4

EN Pull Down Current VEN = 5.5 V IEN 0.3 1 mA

Power Supply Rejection

Ratio

VIN to VOUT

, f = 1 kHz, IOUT = 150 mA,

VIN ≥ VOUT +0.5 V

PSRR(VIN) 70 dB

VBIAS to VOUT

, f = 1 kHz, IOUT = 150 mA,

VIN ≥ VOUT +0.5 V

PSRR(VBIAS) 80 dB

Output Noise Voltage VIN = VOUT +0.5 V, VOUT(NOM) = 1.0 V,

f = 10 Hz to 100 kHz

VN40 mVRMS

Thermal Shutdown

Threshold

Temperature increasing 160 °C

Temperature decreasing 140

Output Discharge

Pull−Down

VEN ≤ 0.4 V, VOUT = 0.5 V, NCP145A and

NCP145C options only

RDISCH 150 W

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.

4. Performance guaranteed over the indicated operating temperature range by design and/or characterization. Production tested at TA = 25°C.

Low duty cycle pulse techniques are used during the testing to maintain the junction temperature as close to ambient as possible.

5. Dropout voltage is characterized when VOUT falls 3% below VOUT(NOM).

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ELECTRICAL CHARACTERISTICS – NCP145xMX100TCG

−40°C ≤ TJ ≤ 85°C; VBIAS = 2.7 V, VIN = 1.3 V, IOUT = 1 mA, VEN = 1 V, CIN = 1 mF, COUT = 2.2 mF, CBIAS = 0.1 mF. Typical values

are at TJ = +25°C. Min/Max values are for −40°C ≤ TJ ≤ 85°C unless otherwise noted. (Note 6)

Parameter Test Conditions Symbol Min Typ Max Unit

Turn-On Time From assertion of VEN to VOUT =

98%VOUT(NOM). VOUT(NOM) = 1.0 V

‘A’ option tON 300 ms

Turn-On Slew Rate VEN 0 V to 1.0 V, VOUT(NOM) = 1.0 V,

VOUT from 10 mV to 610 mV

‘A’ option SR 9 mV/ms

ELECTRICAL CHARACTERISTICS – NCP145xMX105TCG

−40°C ≤ TJ ≤ 85°C; VBIAS = 2.7 V, VIN = 1.35 V, IOUT = 1 mA, VEN = 1 V, CIN = 1 mF, COUT = 2.2 mF, CBIAS = 0.1 mF. Typical values

are at TJ = +25°C. Min/Max values are for −40°C ≤ TJ ≤ 85°C unless otherwise noted. (Note 6)

Parameter Test Conditions Symbol Min Typ Max Unit

Turn-On Time From assertion of VEN to VOUT =

98%VOUT(NOM). VOUT(NOM) = 1.05 V

‘A’ option tON 260 ms

Turn-On Slew Rate VEN 0 V to 1.0 V, VOUT(NOM) = 1.05 V,

VOUT from 10 mV to 610 mV

‘A’ option SR 11 mV/ms

ELECTRICAL CHARACTERISTICS – NCP145xMX120TCG

−40°C ≤ TJ ≤ 85°C; VBIAS = 2.8 V, VIN = 1.5 V, IOUT = 1 mA, VEN = 1 V, CIN = 1 mF, COUT = 2.2 mF, CBIAS = 0.1 mF. Typical values

are at TJ = +25°C. Min/Max values are for −40°C ≤ TJ ≤ 85°C unless otherwise noted. (Note 6)

Parameter Test Conditions Symbol Min Typ Max Unit

Turn-On Time From assertion of VEN to VOUT =

98%VOUT(NOM). VOUT(NOM) = 1.20 V

‘A’ option tON 210 ms

‘C’ option 310

Turn-On Slew Rate VEN 0 V to 1.0 V, VOUT(NOM) = 1.20 V,

VOUT from 10 mV to 610 mV

‘A’ option SR 17 mV/ms

‘C’ option 11

6. Performance guaranteed over the indicated operating temperature range by design and/or characterization. Production tested at T

A = 25°C.

Low duty cycle pulse techniques are used during the testing to maintain the junction temperature as close to ambient as possible.

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TYPICAL CHARACTERISTICS

At TJ = +25°C, VIN = VOUT(TYP) + 0.3 V, VBIAS = 2.7 V, VEN = VBIAS, VOUT(NOM) = 1.0 V, IOUT = 500 mA,

CIN = 1 mF, CBIAS = 0.1 mF, and COUT = 2.2 mF (effective capacitance), unless otherwise noted.

Figure 3. VIN Dropout Voltage vs. IOUT and

Temperature TJ

IOUT

, OUTPUT CURRENT (mA)

3002001000

100

120

VDO (VIN − VOUT) DROPOUT VOLTAGE (mV)

+125°C

+25°C

−40°C

Figure 4. VIN Dropout Voltage vs. (VBIAS −

VOUT) and Temperature TJ

VBIAS − VOUT (V)

4.03.53.02.52.01.51.00.5

120

140

180

200

VDO (VIN − VOUT) DROPOUT VOLTAGE (mV)

4.5

IOUT = 100 mA

100

160

140

160

180

200

+85°C

400 500

+125°C

+25°C−40°C

+85°C

Figure 5. VIN Dropout Voltage vs. (VBIAS −

VOUT) and Temperature TJ

VBIAS − VOUT (V)

4.03.53.02.52.01.51.00.5

100

200

250

4.5

150

300

+125°C

+25°C−40°C

IOUT = 300 mA

VDO (VIN − VOUT) DROPOUT VOLTAGE (mV)

+85°C

Figure 6. VIN Dropout Voltage vs. (VBIAS −

VOUT) and Temperature TJ

VBIAS − VOUT (V)

4.03.53.02.52.01.51.00.5

150

200

300

350

450

500

VDO (VIN − VOUT) DROPOUT VOLTAGE (mV)

4.5

IOUT = 500 mA

100

250

400

+125°C

+25°C−40°C

+85°C

Figure 7. VBIAS Dropout Voltage vs. IOUT and

Temperature TJ

IOUT

, OUTPUT CURRENT (mA)

3002001000

900

1000

1100

1200

1300

1400

VDO (VBIAS − VOUT) DROPOUT VOLTAGE (mV)

+125°C

+25°C

−40°C

25015050

+85°C

Figure 8. BIAS Pin Current vs. IOUT and

Temperature TJ

IOUT

, OUTPUT CURRENT (mA)

5002001000

120

140

IBIAS (mA)

100

25015050

+125°C

+85°C

−40°C+25°C

1500

300 350 400 450

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TYPICAL CHARACTERISTICS

At TJ = +25°C, VIN = VOUT(TYP) + 0.3 V, VBIAS = 2.7 V, VEN = VBIAS, VOUT(NOM) = 1.0 V, IOUT = 500 mA,

CIN = 1 mF, CBIAS = 0.1 mF, and COUT = 2.2 mF (effective capacitance), unless otherwise noted.

Figure 9. BIAS Pin Current vs. VBIAS and

Temperature TJ

VBIAS (V)

5.04.54.0 5.53.53.02.52.0

100

140

180

200

IBIAS (mA)

+125°C

+85°C

−40°C

120

160

+25°C

Figure 10. Current Limit vs. (VBIAS − VOUT)

VBIAS − VOUT (V)

4.54.03.02.51.51.00.50

100

300

400

500

700

1000

ICL, CURRENT LIMIT (mA)

+125°C

+25°C

−40°C

2.0 3.5 5.0

200

600

+85°C

800

900

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TYPICAL CHARACTERISTICS

At TJ = +25°C, VIN = VOUT(TYP) + 0.3 V, VBIAS = 2.7 V, VEN = VBIAS, VOUT(NOM) = 1.0 V, IOUT = 500 mA,

CIN = 1 mF, CBIAS = 0.1 mF, and COUT = 2.2 mF (effective capacitance), unless otherwise noted.

50 mV/div200 mA/div

Figure 11. Load Transient Response,

IOUT = 50 mA to 500 mA, COUT = 10 mF

50 ms/div

tR = tF = 1 ms

IOUT

VOUT

Figure 12. Load Transient Response,

IOUT = 50 mA to 500 mA, COUT = 2.2 mF

50 ms/div

VOUT

Figure 13. Load Transient Response,

IOUT = 1 mA to 500 mA, COUT = 10 mF

Figure 14. Load Transient Response,

IOUT = 1 mA to 500 mA, COUT = 2.2 mF

IOUT

tR = tF = 1 ms

50 mV/div200 mA/div

500 ms/div

tR = tF = 1 ms

IOUT

VOUT

500 ms/div

VOUT

IOUT

tR = tF = 1 ms

50 mV/div200 mA/div

10 mV/div1 V/div

Figure 15. VIN Line Transient Response,

VIN = 1.3 V to 2.3 V, IOUT = 100 mA, COUT = 10 mF

20 ms/div

tR = tF = 5 ms

VIN

VOUT

Figure 16. VIN Line Transient Response,

VIN = 1.3 V to 2.3 V, IOUT = 100 mA, COUT = 2.2 mF

20 ms/div

VOUT

VIN

tR = tF = 5 ms

10 mV/div1 V/div

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APPLICATIONS INFORMATION

EN FB

GND

Processor

I/O

BIAS

OUT

GND

NCP145

LOAD

VBAT

1.5 V

1.0 V

To other circuits

I/O

Figure 17. Typical Application: Low−Voltage DC/DC Post−Regulator with ON/OFF Functionality

Switch−mode DC/DC

VOUT = 1.5 V

The NCP145 dual−rail very low dropout voltage regulator

is using NMOS pass transistor for output voltage regulation

from VIN voltage. All the low current internal control

circuitry is powered from the VBIAS voltage.

The use of an NMOS pass transistor offers several

advantages in applications. Unlike PMOS topology devices,

the output capacitor has reduced impact on loop stability.

Vin to Vout operating voltage difference can be very low

compared with standard PMOS regulators in very low Vin

applications.

The NCP145 offers smooth monotonic start-up. The

controlled voltage rising limits the inrush current.

The Enable (EN) input is equipped with internal

hysteresis. NCP145 Voltage linear regulator Fixed version

is available.

Dropout Voltage

Because of two power supply inputs VIN and VBIAS and

one VOUT regulator output, there are two Dropout voltages

specified.

The first, the VIN Dropout voltage is the voltage

difference (VIN – VOUT) when VOUT starts to decrease by

percent specified in the Electrical Characteristics table.

VBIAS is high enough; specific value is published in the

Electrical Characteristics table.

The second, VBIAS dropout voltage is the voltage

difference (VBIAS – VOUT) when VIN and VBIAS pins are

joined together and VOUT starts to decrease.

Input and Output Capacitors

The device is designed to be stable for ceramic output

capacitors with Effective capacitance in the range from

2.2 mF to 10 mF. The device is also stable with multiple

capacitors in parallel, having the total effective capacitance

in the specified range.

In applications where no low input supplies impedance

available (PCB inductance in VIN and/or VBIAS inputs as

example), the recommended CIN = 1 mF and CBIAS = 0.1 mF

or greater. Ceramic capacitors are recommended. For the

best performance all the capacitors should be connected to

the NCP145 respective pins directly in the device PCB

copper layer, not through vias having not negligible

impedance.

When using small ceramic capacitor, their capacitance is

not constant but varies with applied DC biasing voltage,

temperature and tolerance. The effective capacitance can be

much lower than their nominal capacitance value, most

importantly in negative temperatures and higher LDO

output voltages. That is why the recommended Output

capacitor capacitance value is specified as Effective value in

the specific application conditions.

Enable Operation

The enable pin will turn the regulator on or off. The

threshold limits are covered in the electrical characteristics

table in this data sheet. To get the full functionality of Soft

Start, it is recommended to turn on the VIN and VBIAS supply

voltages first and activate the Enable pin no sooner than VIN

and VBIAS are on their nominal levels. If the enable function

is not to be used then the pin should be connected to VIN or

VBIAS.

If the EN pin voltage is < 0.4 V the device is guaranteed

to be disabled. The pass transistor is turned−off. The active

discharge transistor is active so that the output voltage VOUT

is pulled down to GND through a 150 W resistor. If the EN

pin voltage > 0.9 V the device is guaranteed to be enabled.

The NCP145 regulates the output voltage and the active

discharge transistor is turned−off. The EN pin has internal

pull−down current source which assures that the device is

turned−off when the EN pin is not connected.

Current Limitation

The internal Current Limitation circuitry allows the

device to supply the full nominal current and surges but

protects the device against Current Overload or Short.

Thermal Protection

Internal thermal shutdown (TSD) circuitry is provided to

protect the integrated circuit in the event that the maximum

junction temperature is exceeded. When TSD activated, the

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regulator output turns off. When cooling down under the low

temperature threshold, device output is activated again. This

TSD feature is provided to prevent failures from accidental

overheating.

Activation of the thermal protection circuit indicates

excessive power dissipation or inadequate heatsinking. For

reliable operation, junction temperature should be limited to

+125°C maximum.

ORDERING INFORMATION

Device Nominal Output Voltage Marking Option Package Shipping†

NCP145AMX100TCG 1.00 V HE

Output Active Discharge

Normal Turn−On Slew Rate XDFN4

(Pb−Free) 3000 / Tape & Reel

NCP145AMX105TCG 1.05 V HG

NCP145AMX120TCG 1.20 V HD

NCP145CMX120TCG 1.20 V HH Output Active Discharge

Slow Turn−On Slew Rate

†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Spe-

cifications Brochure, BRD8011/D.

To order other package and voltage variants, please contact your ON Semiconductor sales representative

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PACKAGE DIMENSIONS

XDFN4 1.2x1.2, 0.8P

CASE 711BC

ISSUE O

ÉÉÉ

NOTES:

1. DIMENSIONING AND TOLERANCING PER

ASME Y14.5M, 1994.

2. CONTROLLING DIMENSION: MILLIMETERS.

3. DIMENSION b APPLIES TO PLATED TERMINAL

AND IS MEASURED BETWEEN 0.15 AND

0.20 mm FROM THE TERMINAL TIPS.

4. COPLANARITY APPLIES TO THE EXPOSED

PAD AS WELL AS THE TERMINALS.

A B

PIN ONE

REFERENCE

TOP VIEW

0.05 C

CSEATING

PLANE

SIDE VIEW

DIM MIN MAX

MILLIMETERS

A0.35 0.45

A1 0.00 0.05

A3 0.13 REF

b0.25 0.35

E2 0.58 0.68

e0.80 BSC

L0.25 0.35

*For additional information on our Pb−Free strategy and soldering

details, please download the ON Semiconductor Soldering and

Mounting Techniques Reference Manual, SOLDERRM/D.

MOUNTING FOOTPRINT*

RECOMMENDED

NOTE 4

b1 0.15 0.25

L1 0.13 0.23

E1.15 1.25

D2 0.58 0.68

D1.15 1.25

45 5

0.80 PITCH

0.48

0.35

DIMENSIONS: MILLIMETERS

0.22

PACKAGE

OUTLINE

1.50 4X

0.63

C 0.195

0.25

b4X

NOTE 3

0.05 BC

(0.12)4X

DETAIL A

DETAIL B

SIDE VIEW

(0.12)

ALTERNATE

DETAIL B

CONSTRUCTION

BOTTOM VIEW

e/2

DETAIL A b1

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NCP145/D

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