NCP3334AMTADJTBG - ON SEMICONDUCTOR

September, 2015 − Rev. 1 1Publication Order Number:

NCP3334A/D

NCP3334A

Ultra High Accuracy,

Low Iq, 500 mA

Low Dropout Regulator

The NCP3334A is a high performance, low dropout regulator with

accuracy of ±0.9% over line and load. This device features ultra−low

quiescent current and noise which encompasses all necessary

characteristics demanded by today’s consumer electronics. This

unique device is guaranteed to be stable without a minimum load

current requirement and stable with any type of capacitor as small as

1.0 mF. The NCP3334A offers reverse bias protection. The device is

available in a small 3x3 mm WDFN8 package.

Features

•High Accuracy Over Line and Load (±0.9% at 25°C)

•Ultra−Low Dropout Voltage at Full Load

•No Minimum Output Current Required for Stability

•Low Noise

•Low Shutdown Current

•Reverse Bias Protected

•2.6 V to 12 V Supply Range

•Thermal Shutdown Protection

•Current Limitation

•Requires Only 1.0 mF Output Capacitance for Stability

•Stable with Any Type of Capacitor (including MLCC)

•These are Pb−Free Devices

Applications

•Telecom Applications

•Cellular Base Stations

•Camcoders and Cameras

•Networking Systems, DSL/Cable Modems

•Cable Set−Top Box

•MP3/CD Players

•DSP Supply

•Displays and Monitors

See detailed ordering, marking and shipping information in the

package dimensions section on page 7 of this data sheet.

ORDERING INFORMATION

MARKING DIAGRAM

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WDFN8

MT SUFFIX

CASE 511CF

PIN CONNECTIONS

(Top View)

GND

EPAD SD

OUT

OUT 1

3334A = Specific Device Code

A = Assembly Location

L = Wafer Lot

Y = Year

W = Work Week

G= Pb−Free Package

3334A

ADJ

ALYWG

(Note: Microdot may be in either location)

NCP3334A

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Figure 1. Typical Adjustable Version Application Schematic

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PIN FUNCTION DESCRIPTION

Pin No. Pin Name Description

1, 2 Vout Regulated output voltage. Bypass to ground with Cout w 1.0 mF.

3 FB Adjustable pin; reference voltage = 1.178 V.

4 NC Not Connected

5 GND Power Supply Ground

6 SD Shutdown pin. Pulling this pin Low turns on the regulator

7, 8 Vin Power Supply Input Voltage

− EPAD Exposed thermal pad should be connected to ground or Vin. The EPAD is electrically isolated from the die.

MAXIMUM RATINGS

Rating Symbol Value Unit

Input Voltage Vin −0.3 to +16 V

Output Voltage Vout −0.3 to Vin +0.3 or 10 V* V

Shutdown Pin Voltage Vsh −0.3 to +16 V

Junction Temperature Range TJ−40 to +150 °C

Storage Temperature Range Tstg −65 to +150 °C

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 af fected.

NOTE: This device series contains ESD protection and exceeds the following tests:

Human Body Model (HBM) JESD 22−A114−B

*Which ever is less. Reverse bias protection feature valid only if Vout − Vin ≤ 7 V.

THERMAL CHARACTERISTICS

Characteristic

Test Conditions (Typical Value)

Unit

Min Pad Board 1, Pad Board (Note 1)

WDFN 8

Junction−to−Air, qJA 220 48 °C/W

1. As mounted on 4−Layer FR4 Substrate of a specified copper area of 2 oz copper traces in accordance with JEDEC 51.7.

NCP3334A

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ELECTRICAL CHARACTERISTICS – Adjustable

(Vout = 1.178 V typical, Vin = 6.0 V, TA = −40°C to +85°C, Cin = Cout = 1 mF, unless otherwise noted, Note 2, 3, 4)

Characteristic Symbol Min Typ Max Unit

Reference Voltage Accuracy

Vin = Voutnom + 0.4 V to 11 V, Iload = 0.1 mA to 500 mA, TJ = 25°CVref −0.9%

1.167 1.178 +0.9%

1.189 V

Reference Voltage Accuracy

Vin = Voutnom + 0.4 V to 11 V, Iload = 0.1 mA to 500 mA, TJ = 85°CVref −1.4%

1.162 1.178 +1.4%

1.194 V

Reference Voltage Accuracy (Note 5)

Vin = Voutnom + 0.4 V to 11 V, Iload = 0.1 mA to 500 mA, TJ = 150°CVref −1.5%

1.160 1.178 +1.5%

1.196 V

Line Regulation

Vin = (Voutnom + 0.4 V) to 11 V, Iload = 0.1 mA, TJ = 25°CLineReg 0.04 mV/V

Load Regulation

Iload = 0.1 mA to 500 mA, TJ = 25°CLoadReg 0.04 mV/mA

Dropout Voltage, Vout = 98% of Voutnom

Iload = 500 mA

Iload = 300 mA

Iload = 100 mA

Iload = 1 mA

VDO −

−

340

230

140

−

Peak Output Current (Vin = Voutnom + 1.0 V) Ipk 500 700 860 mA

Thermal Shutdown TJ160 °C

Ground Current

In Regulation

Iload = 500 mA (Note 3)

Iload = 300 mA (Note 3)

Iload = 50 mA

Iload = 0.1 mA

In Dropout

Vin = Vout −0.1 V, Iload = 0.1 mA

In Shutdown

VSD = 6.0 V, Vin = 11 V

IGND

IGNDsh

6.0

3.5

0.7

130

−

1.5

180

450

Output Noise

Iload = 500 mA, f = 10 Hz to 100 kHz, Cout = 10 mF, Cnr = 10 nF

Iload = 500 mA, f = 10 Hz to 100 kHz, Cout = 10 mF, Cnr = 0 nF

Vnoise 26

mVrms

Shutdown

Threshold Voltage OFF

Threshold Voltage ON

VTHSD 2.0 0.4 V

SD Input Current, VSD = 0 V to 0.4 V or VSD = 2.0 V to Vin ISD 1.2 3.0 mA

Output Current In Shutdown Mode, VSD = 2.0 V, Vin = 11 V IOSD 0.07 1.0 mA

Reverse Bias Protection, Current Flowing from the Output Pin to GND

(Vin = 0 V, Vout_forced = Vout(nom) ≤ 7 V) (Note 6) IOUTR 1.0 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.

2. All limits at temperature extremes are guaranteed via correlation using standard statistical quality control (SQC) methods.

3. Ambient temperature of 85°C corresponds to a junction temperature of 125°C under pulsed full load test conditions.

4. Application stable with no load.

5. VIN = 2.6 V to11 V for VOUT(NOM) ≤ 2.2 V and TJ > 0°C, otherwise VIN = 2.9 V to 11 V.

6. Reverse bias protection feature valid only if Vout − Vin ≤ 7 V.

NCP3334A

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TYPICAL CHARACTERISTICS

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

TEMPERATURE (°C) OUTPUT CURRENT (A)

100806040200−20−40

1.178

1.179

1.180

1.181

1.182

1.183

1.184

0.50.40.30.20.10

Figure 4. Dropout Voltage vs. Output Current Figure 5. Quiescent Current vs. Input Voltage

OUTPUT CURRENT (mA) INPUT VOLTAGE (V)

45040035030020015010050

100

125

175

200

225

250

119875432

100

120

140

160

Figure 6. Enable OFF Threshold Figure 7. Peak and Short Current vs.

Temperature

ENABLE VOLTAGE (V) TEMPERATURE (°C)

1.81.61.21.00.60.40.20

0.2

0.4

0.6

0.8

1.0

1.2

1.4

120100806040200

100

200

400

500

600

800

900

OUTPUT VOLTAGE (V)

GROUND CURRENT (mA)

DROPOUT (mV)

QUIESCENT CURRENT (mA)

OUTPUT VOLTAGE (V)

SHORT/PEAK CURRENT (mA)

120

250 500

150

0.8 1.4 2.0

300

700

61012

Peak Current

Voutnom = 1.178 V

VIN = 2.9 V

TA = 25°C

Short Current

Voutnom = 1.178 V

IOUT = 0

TA = 25°C

VIN = 2.9 V

Voutnom = 1.178 V

TA = 25°C

TA = −40°C

TA = 125°C

Voutnom = 2.5 V

TA = 25°C

Voutnom = 1.178 V

IOUT = 0.1 mA

VIN = 12 V

VIN = 6 V

VIN = 2.9 V

Voutnom = 1.178 V

IOUT = 0.1 mA

TA = 25°C

VIN = 12 V

VIN = 10 V

VIN = 5 V

VIN = 2.9 V

NCP3334A

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TYPICAL CHARACTERISTICS

Figure 8. PSRR vs. Frequency Figure 9. Output Noise Density

FREQUENCY (Hz) FREQUENCY (Hz)

1M100K10K1K10010

100

120

1M100K10K1K10010

100

200

300

400

500

600

PSRR (dB)

(nV/√Hz)

IOUT = 1 mA

50 mA

0.1 A

0.5 A

VOUT = 1.178 V

IOUT = 500 mA

Voutnom = 1.178 V

COUT = 10 mF

VIN = 2.9 V + 200 mVpp modulation

TA = 25°C

NCP3334A

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APPLICATIONS INFORMATION

Reverse Bias Protection

Reverse bias is a condition caused when the input voltage

goes to zero, but the output voltage is kept high either by a

large output capacitor or another source in the application

which feeds the output pin.

Normally in a bipolar LDO all the current will flow from

the output pin to input pin through the PN junction with

limited current capability and with the potential to destroy

the IC.

Due to an improved architecture, the NCP3334A can

withstand up to 7.0 V on the output pin with virtually no

current flowing from output pin to input pin, and only

negligible amount of current (tens of mA) flowing from the

output pin to ground for infinite duration.

Input Capacitor

An input capacitor of at least 1.0 mF, any type, is

recommended to improve the transient response of the

regulator and/or if the regulator is located more than a few

inches from the power source. It will also reduce the circuit’s

sensitivity to the input line impedance at high frequencies.

The capacitor should be mounted with the shortest possible

track length directly across the regular’s input terminals.

Output Capacitor

The NCP3334A remains stable with any type of capacitor

as long as it fulfills its 1.0 mF requirement. There are no

constraints o n the minimum ESR and it will remain stable up

to an ESR of 5.0 W. Larger capacitor values will improve the

noise rejection and load transient response.

Adjustable Operation

The output voltage can be set by using a resistor divider

with a range of 1.178 to 10 V. The appropriate resistor

divider can be found by solving the equation below. The

recommended current through the resistor divider is from

10 mA to 100 mA. This can be accomplished by selecting

resistors in the kW range. As result, the Iadj*R2 becomes

negligible in the equation and can be ignored.

Vout +1.178 * ǒ1)R1

R2Ǔ)Iadj *R2 (eq. 1)

Dropout Voltage

The voltage dropout is measured at 97% of the nominal

output voltage.

Thermal Considerations

Internal t hermal l imiting c ircuitry i s p rovided t o p rotect the

integrated circuit in the event that the maximum junction

temperature is exceeded. This feature provides protection

from a catastrophic device failure due to accidental

overheating. T his protection feature i s n ot intended t o be used

as a substitute to h eat sinking. The maximum po wer that can

be dissipated, can be calculated with the equation below:

PD+TJ(max) *TA

RqJA (eq. 2)

For improved thermal performance, contact the factory

for the WDFN package option. The WDFN package

includes an exposed metal pad that is specifically designed

to reduce the junction to air thermal resistance, RqJA.

ORDERING INFORMATION

Device Nominal Output Voltage Marking Package Shipping†

NCP3334AMTADJTBG Adj. 3334A

ADJ WDFN8

(Pb−Free) 3000 / Tape & Reel

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

Specifications Brochure, BRD8011/D.

*Please contact factory for other voltage options.

NCP3334A

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PACKAGE DIMENSIONS

WDFN8 3x3, 0.5P

CASE 511CF

ISSUE O

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

0.05 AND 0.15 MM FROM TERMINAL TIP.

4. COPLANARITY APPLIES TO THE EXPOSED

PAD AS WELL AS THE TERMINALS.

5. POSITIONAL TOLERANCE APPLIES TO ALL

OF THE EXPOSED PADS.

ÇÇÇ

C0.10

PIN ONE

REFERENCE

TOP VIEW

SIDE VIEW

BOTTOM VIEW

C0.10

C0.05

C0.08 A1 SEATING

PLANE

NOTE 3

0.10 C

0.05 C

DIM MIN MAX

MILLIMETERS

A0.70 0.80

A1 0.00 0.05

b0.20 0.30

D3.00 BSC

D2 1.65 1.85

E3.00 BSC

E2 1.35 1.55

e0.50 BSC

L0.30 0.50

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

details, please download the ON Semiconductor Soldering and

Mounting Techniques Reference Manual, SOLDERRM/D.

SOLDERING FOOTPRINT*

NOTE 4

DET AIL A

A3 0.20 REF

DETAIL B

DETAIL A

ALTERNATE

CONSTRUCTIONS

ÉÉ

ÇÇ

ÇÇÇ

ÉÉÉ

DETAIL B

MOLD CMPDEXPOSED Cu

ALTERNATE

CONSTRUCTIONS

L1 0.00 0.15

RECOMMENDED

e/2 M

0.50

PITCH

1.65 3.30

DIMENSIONS: MILLIMETERS

1.94

0.32

0.63

PACKAGE

OUTLINE

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Europe, Middle East and Africa Technical Support:

Phone: 421 33 790 2910

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Phone: 81−3−5817−1050

NCP3334A/D

Micro8 is a trademark of International Rectifier.

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Phone: 303−675−2175 or 800−344−3860 Toll Free USA/Canada

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