Semiconductor Components Industries, LLC, 1999
October, 1999 Rev. 2
1
Publication Order Number:
MC78PC00/D
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 handheld communication
equipment.
The MC78PC00 series are housed in the SOT23 5 lead package,
for maximum board space saving.
MC78PC00 Features:
UltraLow Supply Current: typical 35
mA in ON mode with no load.
Standby Mode: typical 0.1
mA.
Low Dropout Voltage: typical 0.2 V @ IOUT = 100 mA.
High Ripple Rejection: typical 70 dB @ f = 1 kHz.
Low TemperatureDrift 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: SOT23 5 leads.
Builtin 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 2way radios.
Power source for domestic appliances such as cameras, VCRs and
camcorders.
Power source for batterypowered equipment.
Block Diagram
1
VIN
5
VOUT
Vref
CE
3
2
GND
CURRENT LIMIT
MC78PCxx
SOT235
N SUFFIX
CASE 1212
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VOUT
1
5
4
2
3
VIN
GND
CE
N/C
(Top View)
PIN CONNECTIONS
Pin #
Symbol
Description
PINS DESCRIPTION
1
2
3
4
5
VIN
GND
CE
N/C
VOUT
Input Pin
Ground Pin
Chip Enable Pin
No Connection
Output Pin
1
2
3
4
Marking
Voltage Version
DEVICE MARKING
K8
G0
G3
J0
1.8 V
3.0 V
3.3 V
5.0 V
Lot Number
1
2
3
4
(4 digits are available for device marking)
F5
2.5 V
F8
2.8 V
Device
Shipping
Package
ORDERING INFORMATION
MC78PC28NTR
3000 Units
Tape & Reel
SOT23
5 Leads
MC78PC30NTR
MC78PC33NTR
MC78PC50NTR
Other voltages are available. Consult your ON Semiconductor
representative.
MC78PC18NTR
MC78PC25NTR
5
1
MC78PC00 Series
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2
MAXIMUM RATINGS
Rating
Symbol
Value
Unit
Input Voltage
VIN
9.0
V
Input Voltage
VCE
0.3 ~VIN +0.3
V
Output Voltage
VOUT
0.3 ~VIN +0.3
V
Power Dissipation
PD
250
mW
Operating Temperature Range
TA
40 to +85
C
Operating Junction Temperature
TJ
+125
C
Maximum Junction Temperature
TJmax
+150
C
Storage Temperature Range
Tstg
55 to +125
C
ELECTRICAL CHARACTERISTICS
(TA = 25
C)
Characteristic
Symbol
Min
Typ
Max
Unit
Output Voltage (VIN = VOUT + 1.0 V, IOUT = 30 mA)
VOUT
V
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
(VIN = VOUT + 1.0 V, VOUT = VOUT(nom) 0.1 V)
IOUT
150
mA
Load Regulation (VIN = VOUT + 1.0 V, 1.0 mA
IOUT
80 mA)
D
VOUT/
D
IOUT
12
40
mV
Supply Current in ON mode (VIN = VOUT + 1.0 V, IOUT = 0 mA)
ISS
35
70
m
A
Supply Current in OFF mode, i.e. VCE = GND
Istandby
0.1
1.0
m
A
(VIN = VOUT + 1.0 V, IOUT = 0 mA)
Ripple Rejection (f = 1.0 kHz, Ripple 0.5 Vpp, VIN = VOUT + 1.0 V)
RR
70
dB
Input Voltage
VIN
8.0
V
Output Voltage Temperature Coefficient
D
VOUT/
D
T
100
ppm/
C
(IOUT = 30 mA, 40
C
TA
+85
C)
Short Circuit Current Limit (VOUT = 0 V)
Ilim
50
mA
CE Pulldown Resistance
RPD
2.5
5.0
10
M
W
CE Input Voltage "H" (ON Mode)
VIH
1.5
VIN
V
CE Input Voltage "L" (OFF Mode)
VIL
0
0.25
V
Output Noise Voltage (f = 10 Hz to 100 kHz)
en
30
m
Vrms
ELECTRICAL CHARACTERISTICS by OUTPUT VOLTAGE VOUT
(TA = 25
C)
Characteristic
Symbol
Min
Typ
Max
Unit
Dropout Voltage (IOUT = 100 mA)
VDIF
V
1.8
VOUT
1.9
0.60
1.40
2.0
VOUT
2.4
0.35
0.70
2.5
VOUT
2.7
0.24
0.35
2.8
VOUT
3.3
0.20
0.30
3.4
VOUT
6.0
0.17
0.26
Line Regulation
D
VOUT/
D
VIN
%/V
(VOUT + 0.5 V
VIN
8.0 V, IOUT = 30 mA)
0.05
0.20
MC78PC00 Series
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3
OPERATION
MC78PC00
1
VIN
5
VOUT
Vref
CE
3
2
GND
CURRENT LIMIT
R1
R2
ERROR AMP.
In the MC78PC00, the output voltage VOUT 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 enable
circuit are included.
MC78PC00 Series
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4
TEST CIRCUITS
1
VIN
5
VOUT
3
2
GND
2.2
mF
MC78PCxx
Series
CE
OUT
0.1
mF
IN
IOUT
Figure 1. Standard Test Circuits
1
VIN
5
VOUT
3
2
GND
2.2
mF
MC78PCxx
Series
CE
OUT
0.1
mF
IN
IOUT
Figure 2. Supply Current Test Circuit
ISS
1
VIN
5
VOUT
3
2
GND
10
mF
MC78PCxx
Series
CE
OUT
IOUT
Figure 3. Ripple Rejection, Line
Transient Response Test Circuit
1
VIN
5
VOUT
3
2
GND
10
mF
MC78PCxx
Series
CE
OUT
1
mF
IN
Figure 4. Load Transient Response
Test Circuit
IN
P.G.
I1
I2
MC78PC00 Series
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5
3.5
0
V
IOUT, OUTPUT CURRENT (mA)
TA = 25
C
100
200
300
400
500
3.0
2.5
2.0
1.5
1.0
0.5
0
, OUTPUT
VOL
T
AGE (VOL
TS)
OUT
VIN = 3.3 V
5.0 V
4.0 V
3.5 V
4.5
0
V
IOUT, OUTPUT CURRENT (mA)
TA = 25
C
100
200
300
400
500
3.0
2.5
2.0
1.5
1.0
0.5
0
,
OUT
P
UT
VO
L
T
A
GE
(VO
L
T
S
)
OUT
VIN = 4.3 V
6.0 V
5.0 V
4.5 V
3.5
4.0
0
V
IOUT, OUTPUT CURRENT (mA)
TA = 25
C
100
200
300
400
500
6.0
5.0
4.0
3.0
2.0
1.0
0
, OUTPUT
VOL
T
AGE (VOL
TS)
OUT
VIN = 5.3 V
7.0 V
6.0 V
5.5 V
3.1
2.0
VIN, INPUT VOLTAGE (VOLTS)
V
,
OUTPUT
VOL
T
AGE (VOL
TS)
OUT
3.0
2.9
2.8
2.7
2.6
2.5
3.0
4.0
5.0
6.0
7.0
8.0
TA = 25
C
IOUT = 50 mA
30 mA
1.0 mA
2.8 V
2.3 V
2.0
0
V
Figure 5. MC78PC18 Output Voltage versus
Output Current
IOUT, OUTPUT CURRENT (mA)
TA = 25
C
100
200
300
400
500
1.8
1.0
0.8
0.6
0.4
0.2
0
,
OUT
P
UT
VO
L
T
A
GE
(VO
L
T
S
)
OUT
VIN = 2.1 V
3.8 V
1.6
1.4
1.2
Figure 6. MC78PC30 Output Voltage versus
Output Current
Figure 7. MC78PC40 (4.0 V) Output Voltage
versus Output Current
Figure 8. MC78PC50 Output Voltage versus
Output Current
2.0
1.0
VIN, INPUT VOLTAGE (VOLTS)
Figure 9. MC78PC18 Output Voltage versus
Input Voltage
V,
OUT
P
UT
VO
L
T
A
GE
(VO
L
T
S
)
OUT
1.9
1.6
1.5
1.4
1.3
1.2
3.0
4.0
5.0
6.0
7.0
8.0
TA = 25
C
IOUT = 1 mA
30 mA
2.0
1.8
1.7
50 mA
Figure 10. MC78PC30 Output Voltage versus
Input Voltage
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