Datasheet MC78PC28NTR, MC78PC30NTR, MC78PC33NTR, MC78PC50NTR, MC78PC18NTR Datasheet (MOTOROLA)

MC78PC00 Series

Low Noise 150 mA
Low Drop Out (LDO)
Linear Voltage Regulator

The MC78PC00 are a series of CMOS linear voltage regulators with
high output voltage accuracy, low supply current, low dropout voltage,
and high Ripple Rejection. Each of these voltage regulators consists of
an internal voltage reference, an error amplifier, resistors, a current
limiting circuit and a chip enable circuit.

The dynamic Response to line and load is fast, which makes these
products ideally suited for use in hand–held communication
equipment.

The MC78PC00 series are housed in the SOT–23 5 lead package,
for maximum board space saving.

MC78PC00 Features:

• Ultra–Low Supply Current: typical 35

• Standby Mode: typical 0.1

m

A.

• Low Dropout Voltage: typical 0.2 V @ I

• High Ripple Rejection: typical 70 dB @ f = 1 kHz.

• Low Temperature–Drift Coefficient of Output Voltage:

typical ±100 ppm/°C.

• Excellent Line Regulation: typical 0.05%/V.

• High Accuracy Output Voltage: ±2.0%.

• Fast Dynamic Response to Line and Load.

• Small Package: SOT–23 5 leads.

• Built–in Chip Enable circuit (CE input pin).

• Identical Pinout to the LP2980/1/2.

MC78PC00 Applications:

• Power source for cellular phones (GSM, CDMA, TDMA), Cordless

Phones (PHS, DECT) and 2–way radios.

• Power source for domestic appliances such as cameras, VCRs and

camcorders.

• Power source for battery–powered equipment.

Block Diagram

1

V

IN

m

A in ON mode with no load.

= 100 mA.

OUT

MC78PCxx

5

V

OUT

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5

1

SOT–23–5

N SUFFIX

CASE 1212

PIN CONNECTIONS

V

IN

GND

CE

DEVICE MARKING

(4 digits are available for device marking)

Marking Voltage Version

1 2

3 4

Pin # Symbol Description

1
2

3
4
5

K8

F5 2.5 V
F8 2.8 V

G0
G3

J0

PINS DESCRIPTION

V

IN

GND

CE

N/C

V

OUT

ORDERING INFORMATION

1

15

2

2

3

3

4

(Top View)

V

OUT

N/C

4

1.8 V

3.0 V

3.3 V

5.0 V

Lot Number

Input Pin
Ground Pin

Chip Enable Pin
No Connection
Output Pin

ref

CURRENT LIMIT

V

3

CE

 Semiconductor Components Industries, LLC, 1999

October, 1999 – Rev. 2

Device ShippingPackage

MC78PC18NTR
MC78PC25NTR
MC78PC28NTR
MC78PC30NTR

MC78PC33NTR

2

GND

1 Publication Order Number:

MC78PC50NTR

Other voltages are available. Consult your ON Semiconductor
representative.

SOT–23

5 Leads

3000 Units

Tape & Reel

MC78PC00/D

MAXIMUM RATINGS

Á

Á

Á

Á

Á

Á

Rating Symbol Value Unit

Input Voltage
Input Voltage
Output Voltage
Power Dissipation
Operating Temperature Range
Operating Junction Temperature
Maximum Junction Temperature
Storage Temperature Range

MC78PC00 Series

V

V

V

T

Jmax

T

IN

CE

OUT
P

D

T

A

T

J

stg

9.0
–0.3 ~VIN +0.3
–0.3 ~VIN +0.3

250

–40 to +85

+125
+150

–55 to +125

V
V
V

mW

°C
°C
°C
°C

ELECTRICAL CHARACTERISTICS (T

Characteristic

Output Voltage (VIN = V

OUT

+ 1.0 V, I

OUT

= 25°C)

A

= 30 mA)

Symbol Min Typ Max Unit

V

OUT

MC78PC18 1.764 1.80 1.836
MC78PC25 2.450 2.50 2.550
MC78PC28 2.744 2.80 2.856
MC78PC30 2.94 3.00 3.06
MC78PC33 3.234 3.3 3.366
MC78PC50 4.9 5.0 5.1

Nominal Output Current

ББББББББББББББББ

(VIN = V
Load Regulation (VIN = V
Supply Current in ON mode (VIN = V

OUT

+ 1.0 V, V

= V

OUT

OUT(nom)

+ 1.0 V, 1.0 mA ≤ I

OUT

OUT

– 0.1 V)

+ 1.0 V, I

≤ 80 mA)

OUT

= 0 mA) I

OUT

Supply Current in OFF mode, i.e. VCE = GND I

(VIN = V

Ripple Rejection (f = 1.0 kHz, Ripple 0.5 V

OUT

+ 1.0 V, I

OUT

= 0 mA)

p–p

, VIN = V

+ 1.0 V) RR – 70 – dB

OUT

Input Voltage V
Output Voltage Temperature Coefficient

(I

= 30 mA, –40°C ≤ TA ≤ +85°C)

OUT

Short Circuit Current Limit (V

= 0 V) I

OUT

CE Pull–down Resistance R
CE Input Voltage “H” (ON Mode) V
CE Input Voltage “L” (OFF Mode) V
Output Noise Voltage (f = 10 Hz to 100 kHz)

I

OUT

ÁÁÁ

D

V

/DI

OUT

SS

standby

IN

D

V

OUT

lim

PD

IH

IL

e

n

OUT

/DT

150

ÁÁ

–

–

ÁÁ

12
– 35 70
– 0.1 1.0

– – 8.0 V
– ±100 – ppm/°C

– 50 – mA

2.5 5.0 10

1.5 – V
0 – 0.25 V
–

30

–

ÁÁ

40

IN

–

mA

Á

mV

m
m

M

m

V

V

A
A

W

V

rms

ELECTRICAL CHARACTERISTICS by OUTPUT VOLTAGE V

Characteristic

Dropout Voltage (I

1.8 ≤ V

OUT

2.0 ≤ V

OUT

2.5 ≤ V

OUT

2.8 ≤ V

OUT

3.4 ≤ V

OUT

Line Regulation

(V

+ 0.5 V ≤ VIN ≤ 8.0 V, I

OUT

≤ 1.9 – 0.60 1.40
≤ 2.4 – 0.35 0.70
≤ 2.7 – 0.24 0.35
≤ 3.3 – 0.20 0.30
≤ 6.0 – 0.17 0.26

OUT

= 100 mA)

OUT

= 30 mA) – 0.05 0.20

(T

OUT

Symbol Min Typ Max Unit

D

V

OUT

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2

A

V

DIF

= 25°C)

/DV

IN

V

%/V

MC78PC00 Series

OPERATION

MC78PC00

R1

R2

5

V

OUT

2

GND

1

V

IN

3

CE

In the MC78PC00, the output voltage V

ERROR AMP.

V

OUT

CURRENT LIMIT

ref

is detected by R1, R2. The detected output voltage is then compared to the
internal voltage reference by the error amplifier. Both a current limiting circuit for short circuit protection, and a chip ena ble
circuit are included.

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3

MC78PC00 Series

TEST CIRCUITS

Figure 1. Standard T est Circuits

3

CE

IN

0.1 mF

1

V

IN

MC78PCxx

Series

2 GND

Figure 3. Ripple Rejection, Line

Transient Response Test Circuit

3

CE

IN

P.G.

1

V

IN

MC78PCxx

Series

2 GND

5

V

5

V

OUT

OUT

I

OUT

2.2 mF

I

OUT

10 mF

OUT

OUT

IN

Figure 2. Supply Current Test Circuit

3

CE

IN

I

SS

0.1 mF

1

V

IN

MC78PCxx

Series

2 GND

Figure 4. Load Transient Response

T est Circuit

3

CE

1

MC78PCxx

Series

2 GND

V

1 mF

V

IN

5

OUT

5

V

OUT

10 mF

OUT

I

OUT

2.2 mF

I1 I2

OUT

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4

MC78PC00 Series

V

,

OUT

UT

VO

T

GE

(VO

T

)

IN

V

,

OUT

UT

VO

T

GE

(VO

T

)

IN

V,

OUT

UT

VO

T

GE

(VO

T

)

S
L

A
L

P

OUT

S
L

A
L

P

OUT

Figure 5. MC78PC18 Output Voltage versus

Output Current

2.0

1.8

3.8 V

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2

VIN = 2.1 V

0

0

100 200 300 400 500

I

, OUTPUT CURRENT (mA)

OUT

2.8 V

2.3 V

Figure 7. MC78PC40 (4.0 V) Output Voltage

versus Output Current

4.5

4.0

3.5

3.0

2.5

2.0

1.5

1.0

0.5
0

0

100 200 300 400 500

I

, OUTPUT CURRENT (mA)

OUT

TA = 25°C

6.0 V

VIN = 4.3 V

TA = 25°C

5.0 V

4.5 V

, OUTPUT VOLTAGE (VOLTS)

OUT

V

, OUTPUT VOLTAGE (VOLTS)

OUT

V

Figure 6. MC78PC30 Output Voltage versus

Output Current

3.5

3.0

2.5

2.0

1.5

1.0

0.5
0

0

100 200 300 400 500

I

, OUTPUT CURRENT (mA)

OUT

5.0 V

Figure 8. MC78PC50 Output Voltage versus

Output Current

6.0

5.0

4.0

3.0

2.0

1.0

0

0

100 200 300 400 500

I

, OUTPUT CURRENT (mA)

OUT

VIN = 5.3 V

4.0 V

3.5 V
VIN = 3.3 V

TA = 25°C

7.0 V

6.0 V

5.5 V

TA = 25°C

S
L

A
L

P

OUT

Figure 9. MC78PC18 Output Voltage versus

Input Voltage

2.0

1.9
I

= 1 mA

OUT

1.8

1.7

1.6

1.5

1.4

1.3

1.2

1.0

30 mA

50 mA

2.0

3.0 4.0 5.0 6.0 7.0 8.0
V

, INPUT VOLTAGE (VOLTS)

TA = 25°C

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Figure 10. MC78PC30 Output Voltage versus

Input Voltage

3.1

3.0

2.9

2.8

1.0 mA

2.7
30 mA

2.6

OUT

V , OUTPUT VOLTAGE (VOLTS)

5

2.5

2.0

I

= 50 mA

OUT

3.0 4.0 5.0 6.0 7.0 8.0
V

, INPUT VOLTAGE (VOLTS)

TA = 25°C

MC78PC00 Series

V,

OUT

UT

VO

T

GE

(VO

T

)

V

,

DRO

OUT

VO

T

GE

(VO

T

)

OUT

OUT

V

,

DRO

OUT

VO

T

GE

(VO

T

)

Figure 11. MC78PC40 (4.0 V) Output Voltage

versus Input V oltage

4.5

S
L

4.0

A
L

3.5

P

I

=

OUT

3.0

2.5

50 mA

2.0

OUT

1.0 mA

30 mA

3.0 4.0 5.0 6.0 7.0 8.0
VIN, INPUT VOLTAGE (VOLTS)

Figure 13. MC78PC18 Dropout Voltage versus

Output Current

1.2

S

1.0

L

0.8

A
L

0.6

P

0.4

0.2

DIF

0

0

50 100 150

I

, OUTPUT CURRENT (mA)

OUT

TA = 25°C

TA = 85°C

–40°C

25°C

Figure 12. MC78PC50 Output Voltage versus

Input Voltage

5.5

5.0

4.5

4.0
I

= 1.0 mA

OUT

3.5

3.0

OUT

V , OUTPUT VOLTAGE (VOLTS)

2.5

30 mA

2.0

50 mA

3.0 4.0 5.0 6.0 7.0 8.0
VIN, INPUT VOLTAGE (VOLTS)

Figure 14. MC78PC30 Dropout Voltage versus

Output Current

0.40

0.35

0.30

0.25

0.20

0.15

0.10

, DROPOUT VOLTAGE (VOLTS)

DIF

0.05

V

0

0

50 100 150

I

, OUTPUT CURRENT (mA)

OUT

TA = 25°C

TA = 85°C

25°C

–40°C

Figure 15. MC78PC40 (4.0 V) Dropout Voltage

versus Output Current

0.40

S

0.35

L

0.30

A

0.25

L

0.20

0.15

P

0.10

DIF

0.05
0

0

50 100 150

I

, OUTPUT CURRENT (mA)

TA = 85°C

25°C

–40°C

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Figure 16. MC78PC50 Dropout Voltage versus

Output Current

0.40

0.35

0.30

0.25

0.20

0.15

0.10

, DROPOUT VOLTAGE (VOLTS)

DIF

0.05

V

0

0

50 100 150

I

, OUTPUT CURRENT (mA)

TA = 85°C

25°C

–40°C

MC78PC00 Series

V

,

OUT

UT

VO

T

GE

(VO

T

)

IN

V

,

OUT

UT

VO

T

GE

(VO

T

)

I

,

U

Y

CURRENT

(

)

IN

S
L

A
L

P

S
L

A
L

P

1.90

1.88

1.86

1.84

1.82

1.80

1.78

1.76

1.74

OUT

1.72

1.70

4.10

4.08

4.06

4.04

4.02

4.00

3.98

3.96

3.94

OUT

3.92

3.90

Figure 17. MPC78PC18 Output Voltage

versus T emperature

–50

–25 0 25 50 75 100

TA, TEMPERATURE (°C)

Figure 19. MC78PC40 (4.0 V) Output

V oltage versus Temperature

–50

–25 0 25 50 75 100

TA, TEMPERATURE (°C)

VIN = 2.8 V
I

= 30 mA

OUT

VIN = 5.0 V
I

= 10 mA

OUT

, OUTPUT VOLTAGE (VOLTS)

OUT

V

, OUTPUT VOLTAGE (VOLTS)
V

3.08

3.06

3.05

3.04

3.02

3.00

2.98

2.96

2.94

2.92

2.90

5.10

5.08

5.06

5.04

5.02

5.00

4.98

4.96

4.94

OUT

4.92

4.90

–50

–50

Figure 18. MC78PC30 Output

V oltage versus Temperature

VIN = 4.0 V
I

= 10 mA

OUT

–25 0 25 50 75 100

TA, TEMPERATURE (°C)

Figure 20. MC78PC50 Output

V oltage versus Temperature

VIN = 6.0 V
I

= 10 mA

OUT

–25 0 25 50 75 100

TA, TEMPERATURE (°C)

m

A

PPL
S

SS

Figure 21. MC78PC18 Supply Current

versus Input V oltage

60

50

40

30

20

10

0

1.0

3.0 4.0 5.0 6.0 7.0 8.0

2.0
V

, INPUT VOLTAGE (VOLTS)

TA = 25°C

50

40

m

30

20

, SUPPLY CURRENT ( A)

10

SS

I

Figure 22. MC78PC30 Supply Current

versus Input V oltage

0

2.0

3.0 4.0 5.0 6.0 7.0 8.0
V

, INPUT VOLTAGE (VOLTS)

TA = 25°C

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MC78PC00 Series

I

,

U

Y

CURRENT

(

)

I

,

U

Y

CURRENT

(

)

I

,

U

Y

CURRENT

(

)

OUT

Figure 23. MC78PC40 (4.0 V) Supply Current

versus Input V oltage

50

40

m

A

30

20

PPL
S

10

SS

0

2.0

3.0 4.0 5.0 6.0 7.0 8.0
VIN, INPUT VOLTAGE (VOLTS)

Figure 25. MC78PC30 Supply Current

versus T emperature

50

45

m

A

40

TA = 25°C

Figure 24. MC78PC50 Supply Current

versus Input V oltage

50

40

m

30

20

, SUPPLY CURRENT ( A)

10

SS

I

0

2.0

3.0 4.0 5.0 6.0 7.0 8.0
VIN, INPUT VOLTAGE (VOLTS)

TA = 25°C

Figure 26. MC78PC40 (4.0 V) Supply

Current versus Temperature

50

45

m

40

PPL
S

SS

m

A

PPL
S

SS

35

30

25
20

–50

–25 0 25 50 75 100

TA, TEMPERATURE (°C)

Figure 27. MC78PC50 Supply Current

versus T emperature

50

45

40

35

30

25
20

–50

–25 0 25 50 75 100

TA, TEMPERATURE (°C)

, SUPPLY CURRENT ( A)
I

, DROPOUT VOLTAGE (VOLTS)
V

SS

DIF

0.7

0.6

0.5

0.4

0.3

0.2

0.1

35

30

25
20

–50

0

–25 0 25 50 75 100

TA, TEMPERATURE (°C)

Figure 28. Dropout Voltage versus

Output Voltage

I

= 150 mA

OUT

TA = 25°C

100 mA

50 mA

30 mA

10 mA

2.0

3.0 4.0 5.0 6.0
V

, OUTPUT VOLTAGE (VOLTS)

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MC78PC00 Series

RR,

RI

E

REJECTION

(

)

RR,

RI

E

REJECTION

(

)

RR,

RI

E

REJECTION

(

)

0

dB

PPL

dB

PPL

Figure 29. MC78PC18 Ripple Rejection

versus Frequency

80
70
60
50
40
30
20

VIN = 2.8 VDC + 0.5 V

10

C

OUT

0

0.1

= 1.0 mF

p–p

1.0 10 100
f, FREQUENCY (kHz)

Figure 31. MC78PC30 Ripple Rejection

versus Frequency

80
70
60
50
40
30
20

VIN = 4.0 VDC + 0.5 V

10

C

OUT

0

0.1

= 4.7 mF

p–p

1.0 10 100
f, FREQUENCY (kHz)

I

OUT

I

OUT

I

OUT

I

OUT

I

OUT

I

OUT

= 1.0 mA
= 30 mA
= 50 mA

= 1.0 mA
= 30 mA
= 50 mA

Figure 30. MC78PC18 Ripple Rejection

80
70
60
50
40
30
20

RR, RIPPLE REJECTION (dB)

VIN = 2.8 VDC + 0.5 V

10

C

OUT

0

0.1

= 1.0 mF

Figure 32. MC78PC30 Ripple Rejection

80
70
60
50
40
30
20

RR, RIPPLE REJECTION (dB)

VIN = 4.0 VDC + 0.5 V

10

C

OUT

0

0.1

= 10 mF

versus Frequency

I

= 1.0 mA

OUT

I

= 30 mA

p–p

1.0 10 10
f, FREQUENCY (kHz)

OUT

I

OUT

= 50 mA

versus Frequency

I

= 1.0 mA

OUT

I

= 30 mA

p–p

1.0 10 100
f, FREQUENCY (kHz)

OUT

I

OUT

= 50 mA

dB

PPL

80
70
60
50
40
30
20

VIN = 5.0 VDC + 0.5 V

10

C

OUT

0

0.1

Figure 33. MC78PC40 (4.0 V) Ripple

Rejection versus Frequency

I

= 1.0 mA

OUT

I

= 30 mA

= 4.7 mF

p–p

1.0 10 100
f, FREQUENCY (kHz)

OUT

I

OUT

= 50 mA

80
70
60
50
40
30
20

RR, RIPPLE REJECTION (dB)

10

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Figure 34. MC78PC40 (4.0 V) Ripple

VIN = 5.0 VDC + 0.5 V
C

= 10 mF

OUT

0

0.1

Rejection versus Frequency

I

OUT

I

p–p

1.0 10 100
f, FREQUENCY (kHz)

OUT

I

OUT

= 1.0 mA
= 30 mA
= 50 mA

MC78PC00 Series

RR,

RI

E

REJECTION

(

)

RR,

RI

E

REJECTION

(

)

Figure 35. MC78PC50 Ripple Rejection

80
70
60
50
40
30
20

RR, RIPPLE REJECTION (dB)

VIN = 6.0 VDC + 0.5 V

10

C

OUT

0

0.1

= 4.7 mF

versus Frequency

I

= 1.0 mA

OUT

I

= 30 mA

p–p

1.0 10 100
f, FREQUENCY (kHz)

OUT

I

OUT

= 50 mA

dB

PPL

dB

PPL

Figure 36. MC78PC50 Ripple Rejection

versus Frequency

80
70
60
50
40
30
20

VIN = 6.0 VDC + 0.5 V

10

C

OUT

0

0.1

= 10 mF

p–p

1.0 10 100
f, FREQUENCY (kHz)

Figure 38. MC78PC30 Ripple Rejection

versus Input Voltage (DC Bias)

80

I

= 10 mA

OUT

70

C

= 10 mF

OUT

60
50
40
30
20
10

0

3.1

3.2 3.3 3.4 3.5
VIN, INPUT VOLTAGE (VOLTS)

I

OUT

I

OUT

I

OUT

f = 400 Hz
f = 1.0 kHz
f = 10 kHz

= 1.0 mA
= 30 mA
= 50 mA

Figure 37. MC78PC30 Ripple Rejection

versus Input Voltage (DC Bias)

80

I

= 1.0 mA

OUT

70

C

= 10 mF

OUT

60
50
40
30
20

RR, RIPPLE REJECTION (dB)

10

0

3.1

3.2 3.3 3.4 3.5
VIN, INPUT VOLTAGE (VOLTS)

Figure 39. MC78PC30 Ripple Rejection

versus Input Voltage (DC Bias)

80

I

= 50 mA

OUT

70

C

= 10 mF

OUT

60
50
40
30
20

RR, RIPPLE REJECTION (dB)

10

0

3.1

3.2 3.3 3.4 3.5
VIN, INPUT VOLTAGE (VOLTS)

f = 400 Hz
f = 1.0 kHz
f = 10 kHz

f = 400 Hz
f = 1.0 kHz
f = 10 kHz

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MC78PC00 Series

Figure 40. MC78PC30 Line Transient Response Figure 41. MC78PC30 Line Transient Response

3.4

3.3
INPUT VOLTAGE

OUTPUT VOLTAGE

tr = tf = 5.0 ms
C

= 4.7 mF (TANTALUM)

OUT

I

= 30 mA

OUT

, OUTPUT VOLTAGE (VOLTS)

OUT

V

3.2

3.1

3.0

2.9

2.8

0

20 40 60 80 100 120

t, TIME (ms)

Figure 42. MC78PC30 Line Transient Response

3.4

3.3

3.2

INPUT VOLTAGE

6.0

5.0

4.0

6.0

5.0

4.0

3.0

2.0

1.0
0

3.4

V

IN

3.3

, INPUT VOLTAGE (VOLTS)

3.2

3.1

3.0

, OUTPUT VOLTAGE (VOLTS)

2.9

OUT

V

2.8
0

20 40 60 80 100 120

t, TIME (ms)

INPUT VOLTAGE

tr = tf = 5.0 ms
C

= 6.8 mF (TANTALUM)

OUT

I

= 30 mA

OUT

Figure 43. MC78PC30 Load Transient Response

3.4

V

IN

3.3

, INPUT VOLTAGE (VOLTS)

3.2

OUTPUT CURRENT

OUTPUT VOLTAGE

150

100

50

6.0

5.0

4.0

3.0

2.0

1.0
0

V

IN

, INPUT VOLTAGE (VOLTS)

I

OUT

, OUTPUT CURRENT (mA)

3.1

3.0

, OUTPUT VOLTAGE (VOLTS)

2.9

OUT

V

2.8

2.0 4.0 6.0 8.0 10 12

0

t, TIME (ms)

OUTPUT VOLTAGE

CIN = 1.0 mf (TANTALUM)
C

= 4.7 mF (TANTALUM)

OUT

VIN = 4.0 V

14 16 18 20

, OUTPUT VOLTAGE (VOLTS)

OUT

V

3.1

3.0

2.9

2.8

3.0

OUTPUT VOLTAGE

tr = tf = 5.0 ms
C

= 10 mF (TANTALUM)

OUT

I

= 30 mA

OUT

0

20 40 60 80 100 120

t, TIME (ms)

2.0

1.0
0

Figure 44. MC78PC30 Load Transient Response Figure 45. MC78PC30 Load Transient Response

I

OUT

, OUTPUT CURRENT (mA)

3.4

3.3

3.2

3.1

3.0

, OUTPUT VOLTAGE (VOLTS)

2.9

OUT

V

2.8
0

2.0 4.0 6.0 8.0 10 12
t, TIME (ms)

OUTPUT CURRENT

OUTPUT VOLTAGE

CIN = 1.0 mf (TANTALUM)
C

= 10 mF (TANTALUM)

OUT

VIN = 4.0 V

14 16 18 20

3.4

3.3

3.2

3.1

3.0

, OUTPUT VOLTAGE (VOLTS)

2.9

OUT

V

2.8
0

2.0 4.0 6.0 8.0 10 12
t, TIME (ms)

OUTPUT CURRENT

OUTPUT VOLTAGE

CIN = 1.0 mf (TANTALUM)
C

= 6.8 mF (TANTALUM)

OUT

VIN = 4.0 V

14 16 18 20

150

100

50

0

–50

–100
–150

0

–50

–100
–150

150

100

50

0

–50

–100
–150

I

OUT

, OUTPUT CURRENT (mA)

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11

MC78PC00 Series

APPLICATION HINTS

When using these circuits, please be sure to observe the

following points:

• Phase compensation is made for securing stable operation

even if the load current varies. For this reason, be sure to
use a capacitor C

with good frequency characteristics

OUT

and ESR (Equivalent Series Resistance) as described in
the graphs on page 11.
On page 11, the relations between I

Figure 46. Measuring Circuit for White Noise: MC78PC30

4.0 V

CERAMIC

CAPACITOR

(Output Current)

OUT

V

1.0 mF

3

1

IN

2 GND

CE

and ESR of Output Capacitor are shown. The conditions
where the white noise level is under 40 mV (Avg.) are
marked by the shaded area in the graph. (note: When
additional ceramic capacitors are connected to the Output
Pin with Output capacitor for phase compensation, there
is a possibility that the operation will be unstable. Because
of this, test these circuits with as same external
components as ones to be used on the PCB).

5

V

ESR

OUT

CERAMIC
CAPACITOR

I

OUT

S.A.

SPECTRUM
ANALYSER

MEASURING CONDITIONS: (1) FREQUENCY RANGE: 10 Hz TO 1.0 MHz

MEASURING CONDITIONS: (2) TEMPERATURE: 25°C

• Please be sure the Vin and GND lines are sufficiently

wide. When the impedance of these lines is high, there is
a chance to pick up noise or to malfunction.

• Connect the capacitor with a capacitance of 1.0 mF or

more between Vin and GND as close as possible to Vin or
GND.

Figure 47. T ypical Application

IN

+

CAP.

V

IN

MC78PCxx

• Set external components, especially the Output Capacitor ,

as close as possible to the circuit, and make the wiring as
short as possible.

CE

OUT

GND

V

OUT

+

CAP.

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12

MC78PC00 Series

E

R

(

)

OUT

Figure 48. Ceramic Capacitor 4.7 mF

100

10

W

S

1.0

0.1
0

50 100 150

I

, OUTPUT CURRENT (mA)

OUT

100

10

W

ESR ( )

1.0

0.1

Figure 49. Ceramic Capacitor 6.8 mF

0

50 100 150

I

, OUTPUT CURRENT (mA)

OUT

Figure 50. Ceramic Capacitor 10 mF

100

10

W

ESR ( )

1.0

0.1
0

50 100 150

I

, OUTPUT CURRENT (mA)

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13

T APE AND REEL INFORMATION

Component Taping Orientation for 5L SOT–23 Devices

DEVICE

MARKING

MC78PC00 Series

USER DIRECTION OF FEED

PIN 1

Tape & Reel Specifications Table

Package Tape Width (W) Pitch (P) Part Per Full Reel Reel Diameter

5L SOT–23

Standard Reel Component Orientation
for TR Suffix Device
(Mark Right Side Up)

8 mm 4 mm 3000 7 inches

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14

MC78PC00 Series

P ACKAGE DIMENSIONS

SOT–23–5

N SUFFIX

PLASTIC PACKAGE

CASE 1212–01

ISSUE O

NOTES:

1. DIMENSIONS ARE IN MILLIMETERS.

2. INTERPRET DIMENSIONS AND TOLERANCES
PER ASME Y14.5M, 1994.

3. DATUM C IS A SEATING PLANE.

MILLIMETERS

DIM MIN MAX

A1 0.00 0.10
A2 1.00 1.30

B 0.30 0.50
C 0.10 0.25
D 2.80 3.00
E 2.50 3.10

E1 1.50 1.80

e 0.95 BSC

e1 1.90 BSC

L

0.20 –––

L1 0.45 0.75

A

E

D

1523

B

4

0.05

A2

S

A1

L

E1

L1

B 5X

M

e

0.10 CSBSA

C

C

e1

Recommended Footprint for SOT–23–5 Surface Mount Applications

0.7 MAX.

1.0

0.950.95

1.9

SOT–23–5

2.4

(Unit: mm)

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15

MC78PC00 Series

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without further notice to any products herein. SCILLC makes no warranty , representation or guarantee regarding the suitability of its products for any particular
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MC78PC00/D

16