ON Semiconductor NCV4275 Technical data

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NCV4275

5.0 V Low−Drop Voltage
Regulator

This industry standard linear regulator has the capability to drive
loads up to 450 mA at 5.0 V. It is available in DPAK and D2PAK.
This device is pin−for−pin compatible with Infineon part number
TLE4275.

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Features

• 5.0 V, ±2%, 450 mA Output Voltage

• Very Low Current Consumption

• Active RESET

• Reset Low Down to V

= 1.0 V

Q

• 500 mV (max) Dropout Voltage

• Fault Protection

♦ +45 V Peak Transient Voltage
♦ −42 V Reverse Voltage
♦ Short Circuit
♦ Thermal Overload

• NCV Prefix for Automotive and Other Applications Requiring Site

and Control Changes

I

Bandgap

Reference

Error

Amplifier

+

−

Current Li m i t a n d
Saturation Sense

Q

MARKING

DIAGRAMS

DPAK
5−PIN

1

5

1

5

DT SUFFIX

CASE 175AA

D2PAK

5−PIN

DS SUFFIX

CASE 936A

Pin 1. I

2. RO

Tab, 3. GND*

4. D

5. Q
* Tab is connected to
Pin 3 on all packages

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

4275

ALYWW

1

NCV4275

AWLYYWW

1

x

Thermal

Shutdown

D

Figure 1. Block Diagram

 Semiconductor Components Industries, LLC, 2004

August, 2004 − Rev. 8

Reset

Generator

ORDERING INFORMATION

Device Package Shipping

NCV4275DT DPAK 75 Units/Rail
NCV4275DTRK DPAK 2500 Tape & Reel

GND

RO

1 Publication Order Number:

NCV4275DS D2PAK 50 Units/Rail
NCV4275DSR4 D2PAK 800 Tape & Reel

†For information on tape and reel specifications,

including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specification
Brochure, BRD8011/D.

†

NCV4275/D

NCV4275

СССССС

СССССС

СССССС

СССССС

СССССС

PIN FUNCTION DESCRIPTION

Pin No. Symbol Description

1
2
3
4
5

MAXIMUM RATINGS†

Input [I (DC)] −42 45 V
Input [I (Peak Transient Voltage)] − 45 V
Output (Q) −1.0 16 V
Reset Output (RO) −0.3 25 V
Reset Output (RO) −5.0 5.0 mA
Reset Delay (D) −0.3 7.0 V
Reset Delay (D) −2.0 2.0 mA
Operating Range (I) 5.5 42 V
ESD Susceptibility (Human Body Model) 2.0 − kV
Junction Temperature −40 150 °C
Storage Temperature −55 150 °C
Lead Temperature Soldering Reflow (SMD styles only) Note 1

Maximum ratings are those values beyond which device damage can occur. Maximum ratings applied to the device are individual stress limit values
(not normal operating conditions) and are not valid simultaneously. If these limits are exceeded, device functional operation is not implied, damage
may occur and reliability may be affected.

I

RO

GND

D
Q

Input; Battery Supply Input Voltage. Bypass to ground with a ceramic capacitor.
Reset Output; Open Collector Active Reset (accurate when I > 1.0 V).
Ground; Pin 3 internally connected to tab.
Reset Delay; timing capacitor to GND for Reset Delay function.
Output; ±2.0%, 450 mA output. Use 22 F, ESR < 5.0 Ω to ground.

Rating Min Max Unit

−

240 Peak

(Note 3)

Wave Solder (through hole styles only) Note 2

−

260 Peak

°C
°C

THERMAL CHARACTERISTICS

Parameter Test Conditions (Typical Value) Unit

DPAK 5−PIN PACKAGE

Min Pad Board (Note 4) 1″ Pad Board (Note 5)
Junction−to−Tab (psi−JLx, 
Junction−to−Ambient (R

D2PAK 5−PIN PACKAGE

Junction−to−Tab (psi−JLx, 
Junction−to−Ambient (R

1. 60 seconds max above 183°C.

2. 10 seconds max.

3. −5°C/+0°C allowable conditions.

4. 1 oz. copper, 0.26 inch2 (168 mm2) copper area, 0.62″ thick FR4.

5. 1 oz. copper, 1.14 inch2 (736 mm2) copper area, 0.62″ thick FR4.

6. 1 oz. copper, 0.373 inch2 (241 mm2) copper area, 0.62″ thick FR4.

7. 1 oz. copper, 1.222 inch2 (788 mm2) copper area, 0.62″ thick FR4.
†During the voltage range which exceeds the maximum tested voltage of I, operation is assured, but not specified. Wider limits may apply. Thermal

dissipation must be observed closely.

) 4.2 4.7 C/W

JLx

, JA) 100.9 46.8 C/W



JA

0.4 sq. in. Spreader Board (Note 6) 1.2 sq. in. Spreader Board (Note 7)

) 3.8 4.0 C/W

JLx

, JA) 74.8 41.6 C/W



JA

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2

NCV4275

ELECTRICAL CHARACTERISTICS (I = 13.5 V; −40°C < T

< 150°C; unless otherwise noted)

J

Characteristic Test Conditions Min Typ Max Unit

Output

Output Voltage 5.0 mA < IQ < 400 mA, 6.0 V < VI < 28 V 4.9 5.0 5.1 V
Output Voltage 5.0 mA < IQ < 200 mA, 6.0 V < VI < 40 V 4.9 5.0 5.1 V
Output Current Limitation − 450 700 − mA
Quiescent Current, Iq = II − I
Quiescent Current, Iq = II − I
Quiescent Current, Iq = II − I

Q
Q
Q

Dropout Voltage IQ = 300 mA, Vdr = VI − V

IQ = 1.0 mA − 150 200 A
IQ = 250 mA − 10 15 mA
IQ = 400 mA − 23 35 mA

Q

− 250 500 mV
Load Regulation IQ = 5.0 mA to 400 mA −30 15 30 mV
Line Regulation ∆V = 8.0 V to 32 V, IQ = 5.0 mA −25 5.0 25 mV
Power Supply Ripple Rejection fr = 100 Hz, Vr = 0.5 V

pp

− 60 − dB
Temperature Output Voltage Drift − − 0.5 − mV/k

Reset Timing D and Output RO

Reset Switching Threshold − 4.5 4.65 4.8 V
Reset Output Low Voltage R
Reset Output Leakage Current V

> 5.0 k, VQ > 1.0 V − 0.2 0.4 V

ext

= 5.0 V − 0 10 A

ROH

Reset Charging Current VD = 1.0 V 3.0 5.5 9.0 A
Upper Timing Threshold − 1.5 1.8 2.2 V
Lower Timing Threshold − 0.2 0.4 0.7 V
Reset Delay Time CD = 47 nF 10 16 22 ms
Reset Reaction Time CD = 47 nF − 1.5 4.0 s

TYPICAL PERFORMANCE CHARACTERISTICS

1000

Unstable ESR Region for

C

= 1 F − 22 F

100

Vout

10

ESR ()

1

Stable ESR Region

0.1

Unstable Region for C

0.01
0 100 200 300 400 500

Vout

= 1 F

OUTPUT CURRENT (mA)

Figure 2. Output Stability with Output

Capacitor ESR

Maximum ESR for

C

= 1 F − 22 F

Vout

Minimum ESR for

C

= 1 F

Vout

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3

NCV4275

APPLICATION INFORMATION

I

V

I

C

I1

1000 µF

I

C

I2

100 nF

I

D

C

D

47 nF

I

1

D

4

Figure 3. Test Circuit

Circuit Description

The error amplifier compares a temperature−stable
reference voltage to a voltage that is proportional to the
output voltage (Q) (generated from a resistor divider) and
drives the base of a series transistor via a buffer. Saturation
control as a function of the load current prevents
oversaturation of the output power device, thus preventing
excessive substrate current (quiescent current).

Typical drop out voltage at 300 mA load is 250 mV,
500 mV maximum. Test voltage for drop out is 5.0 V input.

Stability Considerations

The input capacitors (CI1 and CI2) are necessary to
control line influences. Using a resistor of approximately

1.0 Ω in series with CI2 can solve potential oscillations due
to stray inductance and capacitance.

The output or compensation capacitor helps determine
three main characteristics of a linear regulator: start−up
delay, load transient response and loop stability.

The capacitor value and type should be based on cost,
availability, size and temperature constraints. A tantalum
or aluminum electrolytic capacitor is best, since a film or
ceramic capacitor with almost zero ESR can cause
instability. The aluminum electrolytic capacitor is the least
expensive solution, but, if the circuit operates at low
temperatures (−25°C to −40°C), both the value and ESR of
the capacitor will vary considerably. The capacitor
manufacturers data sheet usually provides this
information.

The value for the output capac itor CQ shown in Figure 3
should work for most applications, however it is not
necessarily the op timized solution. Stability is guaranteed for
CQ > 22 F and an ESR ≤ 5.0 Ω.

I

C

Q

22 µF

Q

R

ext

5.0 k

NCV4275

3

GND

Q

5

I

RO

2

RO

Calculating Power Dissipation
in a Single Output Linear Regulator

The maximum power dissipation for a single output

regulator (Figure 4) is:

P

D(max)

 [V

 V

I(max)

I(max)Iq

 V

Q(min)]IQ(max)

where

V

I(max)

V

Q(min)

I

Q(max)

is the maximum input voltage,

is the minimum output voltage,

is the maximum output current for the

application,

Iq is the quiescent current the regulator

consumes at I

Once the value of P

permissible value of R

R

JA

The value of R

can then be compared with those in the

JA



D(max)

can be calculated:

JA



150°C 



.

Q(max)

is known, the maximum

T

A

P

D

package section of the data sheet. Those packages with
R

’s less than the calculated value in Equation 2 will keep

JA



the die temperature below 150°C.

In some cases, none of the packages will be sufficient to
dissipate the heat generated by the IC, and an external
heatsink will be required.

I

I

V

I

SMART

REGULATOR

Control

}

Features

Iq

I

Q

V

Q

V

RO

(1)

(2)

V

Q

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4

Figure 4. Single Output Regulator with Key

Performance Parameters Labeled