Datasheet NCV8505 Datasheet (ON Semiconductor)

NCV8505 Series

Micropower 400 mA
LDO Linear Regulators
with ENABLE, DELAY,
and RESET

The NCV8505 is a family of precision micropower voltage
regulators. Their output current capability is 400 mA. The family has
output voltage options for Adjustable, 2.5 V, 3.3 V and 5.0 V.

The output voltage is accurate within ± 2.0% with a maximum
dropout voltage of 0.6 V at 400 mA. Low quiescent current is a feature
drawing less than 1.0 µA w ith E NABLE = 0 V. With ENABLE = 5.0 V,
the part only draws 200 µA with 100 µA load. This part is ideal for any
and all battery operated microprocessor equipment.

Microprocessor control logic includes an active RESET
DELAY).

The active RESET circuit operates correctly at an output voltage as
low as 1.0 V. The RESET

function is activated during the power up
sequence or during normal operation if the output voltage drops below
the regulation limits.

The regulator is protected against reverse battery, short circuit, and
thermal overload conditions. The device can withstand load dump
transients making it suitable for use in automotive environments. The
device has also been optimized for EMC conditions.

Features

• Output Voltage Options: Adjustable, 2.5 V, 3.3 V, 5.0 V

• ± 2.0% Output

• Low < 1.0 µA Sleep Current

• Low 200 µA Quiescent Current

• Fixed or Adjustable Output Voltage

• Active RESET

• ENABLE

• 400 mA Output Current Capability

• Fault Protection

♦ +60 V Peak Transient Voltage
♦ −15 V Reverse Voltage
♦ Short Circuit
♦ Thermal Overload

• NCV Prefix for Automotive and Other Applications Requiring Site

and Change Control

(with

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MARKING
DIAGRAM

NCV8505x

AWLYYWW

2

D

PAK−7

DPS SUFFIX

CASE 936AB

x = Voltage Ratings as Indicated Below:

A = Adjustable
2 = 2.5 V
3 = 3.3 V

5 = 5.0 V
A = Assembly Location
WL = Wafer Lot
YY = Year
WW = Work Week

ORDERING INFORMATION

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

1

 Semiconductor Components Industries, LLC, 2004

January, 2004 − Rev. 3

1 Publication Order Number:

NCV8505/D

NCV8505 Series

PIN CONNECTIONS

FIXED OUTPUTADJUSTABLE OUTPUT

Tab = GND
Lead 1. DELAY

2. ENABLE

3. RESET

4. GND

5. V

ADJ

6. V

OUT

7. V

1

IN

1

Tab = GND
Lead 1. DELAY

2. ENABLE

3. RESET

4. GND

5. SENSE

6. V

OUT

7. V

IN

SENSE

I

V

BAT

Q

10 µF

C

DELAY

(Fixed Output Only)

V

IN

NCV8505

DELAY

V

OUT

V

ADJ

(Adjustable

Output Only)

R

RST

5.1 k

33 µF

V

DD

Microprocessor

ENABLE

GND

RESET

Figure 1. Application Diagram

I/O

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2

NCV8505 Series

MAXIMUM RATINGS*

Rating Value Unit

V

(DC) −15 to 45 V

IN

Peak Transient Voltage (46 V Load Dump @ VIN = 14 V) 60 V
Operating Voltage 45 V
V

(DC) 16 V

OUT

Voltage Range (RESET, DELAY) −0.3 to 10 V
Input Voltage Range: V

ADJ

Input Voltage Range (ENABLE) −0.3 to 10** V
ESD Susceptibility (Human Body Model)

(Machine Model)
Junction Temperature, T
Storage Temperature, T
Package Thermal Resistance, 7 Lead D2PAK Junction−to−Case, R

J

S

θ

Junction−to−Ambient, R

JC

θ

JA

Lead Temperature Soldering: Reflow: (SMD styles only) (Note 1) 240 peak (Note 2) °C

1. 60 second maximum above 183°C.

2. −5°C/+0°C allowable conditions.
*The maximum package power dissipation must be observed.

**Reference Figure 14 for switched−battery ENABLE application.

= R

+ R

***Depending on thermal properties of substrate, R

†During the voltage range which exceeds the maximum tested voltage of V





JA

JC

Thermal dissipation must be observed closely.

.



CA

, operation is assured, but not specified. Wider limits may apply.

IN

−0.3 to 16 V

4.0

200

−40 to +150 °C

−55 to 150 °C

2.0

10−50***

kV

V

°C/W
°C/W

ELECTRICAL CHARACTERISTICS (I

= 1.0 mA, ENABLE = 5.0 V, −40°C ≤ T

OUT

≤ 150°C; VIN = dependent on voltage option

J

(Note 3); unless otherwise specified.)

Characteristic

Test Conditions Min Typ Max Unit

Output Stage

Output Voltage for 2.5 V Option (V

Output Voltage for 3.3 V Option (VO) 7.3 V < VIN < 16 V, 1.0 mA ≤ I

Output Voltage for 5.0 V Option (VO) 9.0 V < VIN < 16 V, 1.0 mA ≤ I

Output Voltage for Adjustable Option

(V

)

O

Dropout Voltage (VIN − V

OUT

(5.0 V and Adj. > 5.0 V Options Only)
Load Regulation VIN = 14 V, 5.0 mA ≤ I
Line Regulation (2.5 V, 3.3 V, and

) 6.5 V < VIN < 16 V, 1.0 mA ≤ I

O

)

4.5 V < V

4.5 V < V

6.0 V < V

V

= V

OUT

6.5 V < V

4.5 V < V

I

= 400 mA

OUT

I

= 1.0 mA

OUT

< 26 V, 1.0 mA ≤ I

IN

< 26 V, 1.0 mA ≤ I

IN

< 26 V, 1.0 mA ≤ I

IN

(Unity Gain)

ADJ

< 16 V, 1.0 mA < I

IN

< 26 V, 1.0 mA < I

IN

4.5 V < VIN < 26 V, I

≤ 400 mA

OUT

≤ 400 mA

OUT

≤ 400 mA

OUT

≤ 400 mA

OUT

≤ 400 mA

OUT

≤ 400 mA

OUT

< 400 mA

OUT

< 400 mA

OUT

≤ 400 mA −30 5.0 30 mV

OUT

= 1.0 mA − 5.0 25 mV

OUT

2.450

2.425

3.234

3.201

4.90

4.85

1.274

1.261

−

−

2.5

2.5

3.3

3.3

5.0

5.0

1.300

1.300
400

30

2.550

2.575

3.366

3.399

5.10

5.15

1.326

1.339
600

150

Adjustable Options)
Line Regulation (5.0 V Option) 6.0 V < VIN < 26 V, I
Quiescent Current, (IQ) Active Mode I

= 100 µA, VIN = 12 V

OUT

I

= 75 mA, VIN = 14 V

OUT

≤ 400 mA, VIN = 14 V

I

OUT

= 1.0 mA − 5.0 25 mV

OUT

−

−

−

200

2.5
25

350

5.0
45

Quiescent Current, (IQ) Sleep Mode ENABLE = 0 V, VIN = 12 V, −40°C ≤ TJ ≤ 125°C − − 1.0 µA
Current Limit − 425 800 − mA
Short Circuit Output Current V

= 0 V 100 500 − mA

OUT

Thermal Shutdown (Guaranteed by Design) 150 180 − °C

3. Voltage range specified in the Output Stage of the Electrical Characteristics in boldface type.

V
V

V
V

V
V

V
V

mV
mV

µA
mA
mA

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3

NCV8505 Series

ELECTRICAL CHARACTERISTICS (continued) (I

= 1.0 mA, ENABLE = 5.0 V, −40°C ≤ T

OUT

≤ 150°C; VIN = dependent on

J

voltage option (Note 4); unless otherwise specified.)

Characteristic

Test Conditions Min Typ Max Unit

Reset Function (RESET)

RESET Threshold for 2.5 V Option

HIGH (V
LOW (V

RL

RH

)

)

Hysteresis

RESET Threshold for 3.3 V Option

HIGH (V
LOW (V

RL

RH

)

)

Hysteresis

RESET Threshold for 5.0 V Option

RL

RH

)

)

HIGH (V
LOW (V
Hysteresis

RESET Threshold for Adjustable Option

HIGH (V
LOW (V

RL

RH

)

)

Hysteresis

Output Voltage

Low (V

RLO

)

DELAY Switching Threshold (VDT)

VIN = 4.5 V (Note 5) (Note 6)
V
V

OUT
OUT

Increasing
Decreasing

2.35

2.30
25

−

1.0 × V

O

−

−

−

−

VIN = 4.5 V (Note 5) (Note 6)
V
V

OUT
OUT

Increasing
Decreasing

3.10

3.00
35

−

1.0 × V

O

−

−

−

−

VIN = 6.0 V (Note 6)
V
V

OUT
OUT

Increasing
Decreasing

4.70

4.60
50

−

1.0 × V

−

−

O

−

−

VIN = 4.5 V (Note 5) (Note 6)
V

Increasing

OUT

Decreasing

V

OUT

VIN = Minimum (Note 6) (Note 7)

1.0 V ≤ V

OUT

≤ VRL, R

RESET

= 5.1 k

1.22

1.19
10

−

1.0 × V

O

−

−

−

−

− 0.1 0.4 V

VIN = Minimum (Note 6) (Note 7) 1.4 1.8 2.2 V

(2.5 V, 3.3 V, and 5.0 V Options)

DELAY Switching Threshold (VDT)

VIN = Minimum (Note 6) (Note 7) 1.0 1.3 1.6 V

(Adjustable Option)

DELAY Low Voltage VIN = Minimum (Note 6) (Note 7)

V

< RESET Threshold Low(min)

OUT

DELAY Charge Current VIN = Minimum (Note 6) (Note 7)

DELAY = 1.0 V, V

OUT

> V

RH

DELAY Discharge Current VIN = Minimum (Note 6) (Note 7)

DELAY = 1.0 V, V

OUT

< V

RL

− − 0.2 V

2.5 4.0 5.5 µA

5.0 − − mA

Voltage Adjust (Adjustable Output only)

Input Current V

= 1.25 V, VIN = Minimum (Note 6) (Note 7) −0.5 − 0.5 µA

ADJ

ENABLE

Input Threshold Low, VIN = 14 V (Note 6)

High, V

= 14 V (Note 6)

IN

2.0

−

−

−

1.0

−

Input Current ENABLE = 5.0 V, VIN = 14 V (Note 6) − 30 75 µA

4. Voltage range specified in the Output Stage of the Electrical Characteristics in boldface type.

5. For V

6. Part is guaranteed by design to meet specification over the entire V

7. Minimum V

≤ 4.5 V, a RESET = Low may occur with the output in regulation.

IN

= 4.5 V for 2.5 V, 3.3 V, and Adjustable options. Minimum VIN = 6.0 V for 5.0 V option.

IN

voltage range, but is production tested only at the specified VIN voltage.

IN

V
V

mV

V
V

mV

V
V

mV

V
V

mV

V
V

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4

NCV8505 Series

PACKAGE PIN DESCRIPTION, ADJUSTABLE OUTPUT

Pin Number Pin Symbol Function

1 DELAY Timing capacitor for RESET function.
2 ENABLE ENABLE control for the IC. A high powers the device up.
3 RESET Active reset (accurate to V
4 GND Ground. All GND leads must be connected to Ground
5 V
6 V
7 V

ADJ

OUT

IN

Voltage Adjust. A resistor divider from V
±2.0%, 400 mA output.
Input Voltage.

PACKAGE PIN DESCRIPTION, FIXED OUTPUT

Pin Number Pin Symbol Function

1 DELAY Timing capacitor for RESET function.
2 ENABLE ENABLE control for the IC. A high powers the device up.
3 RESET Active reset (accurate to V
4 GND Ground. All GND leads must be connected to Ground

5 SENSE

6 V
7 V

OUT

IN

Kelvin connection which allows remote sensing of output voltage for improved regulation. If
remote sensing is not desired, connect to V

±2.0%, 400 mA output.
Input Voltage.

OUT

OUT

≥ 1.0 V)

≥ 1.0 V)

to this lead sets the output voltage.

OUT

OUT

.

.

.

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5

NCV8505 Series

V

V

IN

OUT

ENABLE

RESET

DELAY

+

−

Current Source

(Circuit Bias)

1.5 V

1.8 V (Fixed Versions)

1.3 V (Adjustable Version)

+

−

4.0 µA

I

BIAS

I

+

−

Thermal

Protection

Bandgap

Reference

I

BIAS

Figure 2. Block Diagram

BIAS

+

−
Error Amplifier

V

BG

VBG −18 mV

V

BG

Current Limit

Sense

Fixed Versions only

15 k

Adjustable

Version only

SENSE

V

ADJ

GND

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6

5.10

5.08

5.06

5.04

5.02

5.00

4.98

4.96

, OUTPUT VOLTAGE (V)

4.94

out

V

4.92

4.90

−40

TYPICAL PERFORMANCE CHARACTERISTICS

V
V
I

OUT

−20 1400 20 40 60 80 120100
TEMPERATURE (°C)

= 5.0 V

OUT

= 14 V

IN

= 5.0 mA

NCV8505 Series

3.35

3.33

3.31

3.29

3.27

, OUTPUT VOLTAGE (V)

out

3.25

V

3.23

160

−40

V
V
I

OUT

−20 1400 20 40 60 80 120100
TEMPERATURE (°C)

= 3.3 V

OUT

= 14 V

IN

= 5.0 mA

160

Figure 3. 5 V Output Voltage vs Temperature

2.55

2.54

2.53

2.52

2.51

2.50

2.49

2.48

, OUTPUT VOLTAGE (V)

2.47

out

V

2.46

2.45

−40

−20 1400 20 40 60 80 120100
TEMPERATURE (°C)

V
V
I

OUT

OUT
IN

= 2.5 V

= 14 V

= 5.0 mA

160

Figure 4. 3.3 V Output Voltage vs Temperature

700

600

500

400

300

200

DROPOUT VOLTAGE (mV)

100

0

0

50 100 150 200 250

I

125 °C

25 °C

−40 °C

5 V and Adj. > 5 V options only

, OUTPUT CURRENT (mA)

out

300 350 400

Figure 5. 2.5 V Output Voltage vs Temperature Figure 6. Dropout Voltage vs Output Current

100

10

Unstable Region

5.0 V

3.3 V

2.5 V

100

10

Unstable Region

C

VOUT

= 33 F*

C

= 0.1 F

VOUT

5 V version

ESR ()

1.0

0.1

0.01

Stable Region

VIN = 14 V
C

VOUT

0

50 100 150 200 250 350 400

, OUTPUT CURRENT (mA)

I

out

300

= 10 F

Stable Region

ESR ()

1.0
Unstable Region

*There is no unstable lower

0.1

region for the 33 F capacitor

0 300

50 100 150 200 250 350 400

, OUTPUT CURRENT (mA)

I

out

Figure 7. Output Stability with Output Voltage Change Figure 8. Output Stability with Output Capacitor Change

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7

NCV8505 Series

TYPICAL PERFORMANCE CHARACTERISTICS

2.0

1.8

1.6

1.4

+125°C

+25°C

−40°C

60

50

+25°C

40

1.2

1.0

30

0.8

0.6

0.4

, QUIESCENT CURRENT (mA)

Q

I

0.2

0.0
0

5101520 3025

, OUTPUT CURRENT (mA)

I

OUT

35 40 5045

20

10

, QUIESCENT CURRENT (mA)

Q

I

0

0

50

100

150 200 300250

, OUTPUT CURRENT (mA)

I

OUT

350 400 500450

Figure 9. Quiescent Current vs Output Current Figure 10. Quiescent Current vs Output Current

12

I

= 200 mA

out

10

8

6

I

= 100 mA

4

2

, QUIESCENT CURRENT (mA)

Q

I

0

6

8

out

I

out

I

out

10

12 14 1816

V

= 50 mA
= 10 mA

, INPUT VOLTAGE (V)

IN

T = 25°C

20 22 2624

, QUIESCENT CURRENT (A)
I

Q

210

205

200

195

190

185

180

175

I

= 100 A

out

6

10

8

12 14 1816

, INPUT VOLTAGE (V)

V

IN

20 22 2624

+125°C

−40°C

T = 25°C

Figure 11. Quiescent Current vs Input Voltage

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Figure 12. Quiescent Current vs Input Voltage

8

NCV8505 Series

CIRCUIT DESCRIPTION

REGULATOR CONTROL FUNCTIONS

The NCV8505 contains the microprocessor compatible

control function RESET (Figure 13).

V

IN

V

OUT

DELAY

RESET

T

d

T

d

RESET

Threshold

DELAY

Threshold

(V

DT

Figure 13. Reset and Delay Circuit Wave Forms

RESET Function

A RESET signal (low voltage) is generated as the IC
powers up until V
voltage, or when V

is within 1.5% of the regulated output

OUT

drops out of regulation,and is lower

OUT

than 4.0% below the regulated output voltage. Hysteresis is
included in the function to minimize oscillations.

The RESET output is an open collector NPN transistor,
controlled by a low voltage detection circuit. The circuit is
functionally independent of the rest of the IC thereby
guaranteeing that the RESET

signal is valid for V

OUT

as low

as 1.0 V.

DELAY Function

The reset delay circuit provides a programmable (by

external capacitor) delay on the RESET output lead.

The DELAY lead p rovides s ource c urrent ( typically 4 .0 µA)

to the external DELAY capacitor during the following
proceedings:

1. During Power Up (once the regulation threshold
has been verified).

2. After a reset event has occurred and the device is
back in regulation. The DELAY capacitor is
discharged when the regulation (RESET

)

has been violated. This is a latched incident. The
capacitor will fully discharge and wait for the
device to regulate before going through the delay
time event again.

Voltage Adjust

Figure 15 shows the device setup for a user configurable

output voltage. The feedback to the V

pin is taken from

ADJ

a voltage divider referenced to the output voltage. The loop
is balanced around the Unity Gain threshold (1.30 V
typical).

V

NCV8505

V

OUT

ADJ

15 k

1.28 V

≈5.0 V

threshold)

C

OUT

ENABLE Function

The part stays in a low IQ sleep mode when the ENABLE
pin is held low. The part has an internal pull down if the pin
is left floating.

The integrity of the ENABLE pin allows it to be tied to the
battery line through an external resistor. It will withstand
load dump potentials in this configuration.

V

BAT

Up to 45 V

10 k

V

IN

NCV8505

ENABLE

Figure 14. ENABLE Function

GND

V

OUT

5.1 k

Figure 15. Adjustable Output Voltage

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9

NCV8505 Series

APPLICATION NOTES

SETTING THE DELAY TIME

The delay time is controlled by the Reset Delay Low
Voltage, Delay Switching Threshold, and the Delay Charge
Current. The delay follows the equation:

t

DELAY



[

C

DELAY(Vdt

Delay Charge Current

 Reset Delay Low Voltage)

]

Example:

Using C

DELAY

= 33 nF.
Assume reset Delay Low Voltage = 0.
Use the typical value for V

= 1.8 V (2.5 V, 3.3 V, and

dt

5.0 V options).

Use the typical value for Delay Charge Current = 4.2 µA.

t

DELAY

[

33 nF(1.8 0)



4.2 A

]

 14 ms

STABILITY CONSIDERATIONS

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 capacitor C

shown i n F igure 16

OUT

should work for most applications, however it is not
necessarily the optimized solution.

P

D(max)

 [V

 V

IN(max)

IN(max)IQ

 V

OUT(min)]IOUT(max)

(1)

where:

V
V
I

OUT(max)

is the maximum input voltage,

IN(max)
OUT(min)

is the minimum output voltage,

is the maximum output current for the
application, and
IQ is the quiescent current the regulator consumes at
I

OUT(max)

Once the value of P

permissible value of R

The value of R

.

is known, the maximum

D(max)

can be calculated:

JA



R

JA



150°C 



JA

can then be compared with those in the

T

A

P

D

(2)

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

IN

V

IN

Figure 17. Single Output Regulator with Key

Performance Parameters Labeled

SMART

REGULATOR

Control

}

Features

I

Q

I

OUT

V

OUT

V

IN

CIN*

0.1 µF

*CIN required if regulator is located far from the power supply

filter.

required for stability. Capacitor must operate at minimum

**C

OUT

temperature expected.

Figure 16. Test and Application Circuit Showing

NCV8505

Output Compensation

V

OUT

RESET

C

R

RST

OUT

33 µF

CALCULATING POWER DISSIPATION IN A

SINGLE OUTPUT LINEAR REGULATOR

The maximum power dissipation for a single output

regulator (Figure 17) is:

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HEAT SINKS

A heat sink effectively increases the surface area of the

**

package to improve the flow of heat away from the IC and
into the surrounding air.

Each material in the heat flow path between the IC and the

outside environment will have a thermal resistance. Like
series electrical resistances, these resistances are summed to
determine the value of R

R

 R

JA

JC



JA

 R

:

CS

 R

SA

(3)

where:

R

= the junction−to−case thermal resistance,

JC



R

= the case−to−heatsink thermal resistance, and

CS



R

= the heatsink−to−ambient thermal resistance.

SA



R

appears in the package section of the data sheet. Like

JC



R

, it too is a function of package type. R

JA





CS

and R

are

SA



functions of the package type, heatsink and the interface
between them. These values appear in heat sink data sheets
of heat sink manufacturers.

10

NCV8505 Series

ORDERING INFORMATION

Device Output Voltage Package Shipping†

NCV8505D2TADJ
NCV8505D2TADJR4
NCV8505D2T25
NCV8505D2T25R4
NCV8505D2T33
NCV8505D2T33R4
NCV8505D2T50
NCV8505D2T50R4

†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.

Adjustable

2.5 V
D2PAK−7

3.3 V

5.0 V

50 Units/Rail

750 Tape & Reel

50 Units/Rail

750 Tape & Reel

50 Units/Rail

750 Tape & Reel

50 Units/Rail

750 Tape & Reel

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11

NCV8505 Series

PACKAGE DIMENSIONS

D2PAK−7

DPS SUFFIX

CASE 936AB−01

ISSUE O

For D2PAK Outline and

Dimensions − Contact Factory

SMART REGULATOR is a registered trademark of Semiconductor Components Industries, LLC (SCILLIC).

ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice
to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability
arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages.
“Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All
operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights
nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications
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NCV8505/D

12

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