MC33375, NCV33375 Series
300 mA, Low Dropout
Voltage Regulator with
On/Off Control
The MC33375 series are micropower low dropout voltage
regulators available in a wide variety of output voltages as well as
packages, SOT−223 and SOP−8. These devices feature a very low
quiescent current and are capable of supplying output currents up to
300 mA. Internal current and thermal limiting protection are provided
by the presence of a short circuit at the output and an internal thermal
shutdown circuit.
The MC33375 has a control pin that allows a logic level signal to
turn−off or turn−on the regulator output.
Due to the low input−to−output voltage differential and bias current
specifications, these devices are ideally suited for battery powered
computer, consumer, and industrial equipment where an extension of
useful battery life is desirable.
Features:
1
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LOW DROPOUT
MICROPOWER VOLTAGE
REGULATOR
MARKING
DIAGRAMS
4
SOT−223
ST SUFFIX
CASE 318E
1
8
8
1
SOIC−8
D SUFFIX
CASE 751
1
A = Assembly Location
Y = Year
M = Date Code
L = Wafer Lot
W = Work Week
xx = Voltage Version
G
= Pb−Free Package
(Note: Microdot may be in either location)
375xx
ALYW
G
AYM
375xx
G
G
•
Low Quiescent Current (0.3
mA
in OFF mode; 125
mA
in ON mode)
•
Low Input−to−Output Voltage Differential of 25 mV at I
O
= 10 mA,
•
•
•
•
•
•
and 260 mV at I
O
= 300 mA
Extremely Tight Line and Load Regulation
Stable with Output Capacitance of only 0.33
mF
for 2.5 V Output
Voltage
Internal Current and Thermal Limiting
Logic Level ON/OFF Control
NCV Prefix for Automotive and Other Applications Requiring
Unique Site and Control Change Requirements; AEC−Q100
Qualified and PPAP Capable
These are Pb−Free Devices
V
in
Thermal &
Anti−sat
Protection
Rint
On/Off
Block
1.23 V
V. Ref.
54 K
This device contains 41 active transistors
GND
V
out
ORDERING INFORMATION
See detailed ordering and shipping information in the
package dimensions section on page 11 of this data sheet.
On/Off
Figure 1. Simplified Block Diagram
©
Semiconductor Components Industries, LLC, 2013
October, 2013
−
Rev. 16
1
Publication Order Number:
MC33375/D
MC33375, NCV33375 Series
PIN CONNECTIONS
Gnd
4
Input
Gnd
Gnd
1
2
3
V
in
ON/ V
out
OFF
ON/OFF
1
2
3
4
8
7
6
5
Output
Gnd
Gnd
N/C
MAXIMUM RATINGS
Rating
Input Voltage
Power Dissipation and Thermal Characteristics
T
A
= 25°C
Maximum Power Dissipation
Case 751 (SOP−8) D Suffix
Thermal Resistance, Junction−to−Ambient
Thermal Resistance, Junction−to−Case
Case 318E (SOT−223) ST Suffix
Thermal Resistance, Junction−to−Air
Thermal Resistance, Junction−to−Case
Output Current
Maximum Junction Temperature
Operating Ambient Temperature Range
Storage Temperature Range
Symbol
V
CC
Value
13
Unit
Vdc
P
D
R
qJA
R
qJC
R
qJA
R
qJC
I
O
T
J
T
A
T
stg
Internally Limited
160
25
245
15
300
150
−
40 to +125
−
65 to +150
W
°C/W
°C/W
°C/W
°C/W
mA
°C
°C
°C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
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2
MC33375, NCV33375 Series
ELECTRICAL CHARACTERISTICS
(C
L
= 1.0
mF,
T
A
= 25°C, for min/max values T
J
=
−40°C
to +125°C, Note 1)
Characteristic
Output Voltage
1.8 V Suffix
2.5 V Suffix
3.0 V Suffix
3.3 V Suffix
5.0 V Suffix
1.8 V Suffix
2.5 V Suffix
3.0 V Suffix
3.3 V Suffix
5.0 V Suffix
Line Regulation
Load Regulation
I
O
= 0 mA to 250 mA
T
A
= 25°C, V
in
= [V
O
+ 1] V
Symbol
V
O
Min
1.782
2.475
2.970
3.267
4.950
1.764
2.450
2.940
3.234
4.900
Reg
line
Reg
load
V
in
−
V
O
−
−
Typ
1.80
2.50
3.00
3.30
5.00
−
−
−
−
−
2.0
5.0
Max
1.818
2.525
3.030
3.333
5.05
1.836
2.550
3.060
3.366
5.100
10
25
mV
mV
mV
−
−
−
−
65
−
−
25
115
220
260
75
160
46
100
200
400
500
−
−
−
dB
mVrms
Unit
Vdc
V
in
= [V
O
+ 1] V, 0 < I
O
< 100 mA
2% Tolerance from T
J
=
−40
to +125°C
V
in
= [V
O
+ 1] V to 12 V, I
O
= 250 mA,
All Suffixes T
A
= 25°C
V
in
= [V
O
+ 1] V, I
O
= 0 mA to 250 mA,
All Suffixes T
A
= 25°C
Dropout Voltage (Note 3)
T
J
=
−40°C
to +125°C
I
O
= 10 mA
I
O
= 100 mA
I
O
= 250 mA
I
O
= 300 mA
Ripple Rejection (120 Hz)
V
in(peak−peak)
= [V
O
+ 1.5] V to [V
O
+ 5.5] V
−
V
n
Output Noise Voltage
C
L
= 1.0
mF
I
O
= 50 mA (10 Hz to 100 kHz)
C
L
= 200
mF
CURRENT PARAMETERS
Quiescent Current ON Mode
Quiescent Current OFF Mode
Quiescent Current ON Mode SAT
3.0 V Suffix
3.3 V Suffix
5.0 V Suffix
Current Limit
V
in
= [V
O
−
0.5] V, I
O
= 0 mA (Notes 2, 4)
V
in
= [V
O
+ 1] V, I
O
= 0 mA
I
QOn
I
QOff
I
QSAT
−
−
−
−
−
−
125
0.3
1500
1500
1500
450
200
4.0
2000
2000
2000
−
mA
mA
mA
V
in
= [V
O
+ 1] V, V
O
Shorted
I
LIMIT
mA
ON/OFF INPUTS
On/Off Input Voltage
Logic “1” (Regulator On) V
out
= V
O
±
2%
Logic “0” (Regulator Off) V
out
< 0.03 V
Logic “0” (Regulator Off) V
out
< 0.05 V (1.8 V Option)
V
CTRL
V
2.4
−
−
−
−
−
−
0.5
0.3
THERMAL SHUTDOWN
Thermal Shutdown
1.
2.
3.
4.
−
−
150
−
°C
Low duty pulse techniques are used during test to maintain junction temperature as close to ambient as possible.
Quiescent Current is measured where the PNP pass transistor is in saturation. V
in
= [V
O
−
0.5] V guarantees this condition.
For 1.8 V version V
DO
is constrained by the minimum input voltage of 2.5 V.
For 1.8 V and 2.5 V versions, I
QSAT
is constrained by the minimum input voltage of 2.5 V.
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3
MC33375, NCV33375 Series
DEFINITIONS
Load Regulation
−
The change in output voltage for a
change in load current at constant chip temperature.
Dropout Voltage
−
The input/output differential at which
the regulator output no longer maintains regulation against
further reductions in input voltage. Measured when the
output drops 100 mV below its nominal value (which is
measured at 1.0 V differential), dropout voltage is affected
by junction temperature, load current and minimum input
supply requirements.
Output Noise Voltage
−
The RMS AC voltage at the
output with a constant load and no input ripple, measured
over a specified frequency range.
Maximum Power Dissipation
−
The maximum total
dissipation for which the regulator will operate within
specifications.
Quiescent Current
−
Current which is used to operate the
regulator chip and is not delivered to the load.
Line Regulation
−
The change in output voltage for a
change in the input voltage. The measurement is made under
conditions of low dissipation or by using pulse techniques
such that the average chip temperature is not significantly
affected.
Maximum Package Power Dissipation
−
The maximum
package power dissipation is the power dissipation level at
which the junction temperature reaches its maximum value
i.e. 150°C. The junction temperature is rising while the
difference between the input power (V
CC
X I
CC
) and the
output power (V
out
X I
out
) is increasing.
Depending on ambient temperature, it is possible to
calculate the maximum power dissipation and so the
maximum current as following:
T –T
Pd
+
J A
R
qJA
The maximum operating junction temperature T
J
is
specified at 150°C, if T
A
= 25°C, then P
D
can be found. By
neglecting the quiescent current, the maximum power
dissipation can be expressed as:
I out
+
P
D
V – Vout
CC
The thermal resistance of the whole circuit can be
evaluated by deliberately activating the thermal shutdown
of the circuit (by increasing the output current or raising the
input voltage for example).
Then you can calculate the power dissipation by
subtracting the output power from the input power. All
variables are then well known: power dissipation, thermal
shutdown temperature (150°C for MC33375) and ambient
temperature.
R
T –T
+
J A
qJA
P
D
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4
MC33375, NCV33375 Series
7
T
A
= 25° C
6 C
L
= 0.47
mF
I
L
= 10 mA
5 V
out
= 3.3 V
4
V
in
200
OUTPUT VOLTAGE CHANGE (mV)
150
100
50
7
T
A
= 25° C
6 C
L
= 33
mF
I
L
= 10 mA
5 V
out
= 3.3 V
4
3
2
1
0
0
50
100
TIME (mS)
150
V
out
V
in
70
60
50
40
30
20
10
0
-10
-20
200
OUTPUT VOLTAGE CHANGE (mV)
Vin , INPUT VOLTAGE (V)
3
2
1
0
0
20
40
60
80
100
120
140
160
TIME (mS)
0
V
out
-50
-100
180 200
Figure 2. Line Transient Response
Vin , INPUT VOLTAGE (V)
Figure 3. Line Transient Response
300
200
100
LOAD CURRENT (mA)
0
-100
-200
-300
-400 C
L
= 1.0
mF
V
out
= 3.3 V
-500 T
A
= 25° C
-600 V
in
= 4.3 V
-700
0
50
100
150
V
out
CHANGE
LOAD
CURRENT
1.0
0.8
OUTPUT VOLTAGE CHANGE (V)
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
200
250
300
-1.0
350 400
LOAD CURRENT (mA)
350
250
150
50
-50
-150
-250
-350
-450
-550
-650
-750
0
50
100
150
200
250
300
-0.01
0.14
OUTPUT VOLTAGE CHANGE (V)
LOAD CURRENT
0.09
0.04
V
out
CHANGE
C
L
= 33.0
mF
V
out
= 3.3 V
T
A
= 25° C
V
in
= 4.3 V
-0.06
-0.11
-0.16
TIME (mS)
TIME (mS)
Figure 4. Load Transient Response
Figure 5. Load Transient Response
3.5
3.0
OUTPUT VOLTAGE (V)
2.5
2.0
1.5
1.0
0.5
0
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5 5.0
INPUT VOLTAGE (V)
I
L
= 1 mA
I
L
= 250 mA
300
250
200
150
100
50
0
1
10
100
1000
I
O
, OUTPUT CURRENT (mA)
Figure 6. Output Voltage versus Input Voltage
DROPOUT VOLTAGE (mV)
5
Figure 7. Dropout Voltage versus Output Current
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