Datasheet MC33375ST-3.3T3, MC33375D-5.0R2, MC33375ST-1.8T3, MC33375ST-2.5T3, MC33375D-3.3R2 Datasheet (MOTOROLA)

MC33375

Advance Information

Low Dropout 300 mA
V oltage 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 surface mount packages. 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:

• Low Quiescent Current (0.3

• Low Input–to–Output Voltage Differential of 25 mV at I

and 260 mV at I

= 300 mA

O

• Extremely Tight Line and Load Regulation

• Stable with Output Capacitance of only 0.33

Voltage

• Internal Current and Thermal Limiting

• Logic Level ON/OFF Control

Simplified Block Diagram

V

in

m

A in OFF mode; 125 mA in ON mode)

= 10 mA,

O

m

F for 2.5 V Output

V

out

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LOW DROPOUT

MICROPOWER VOLTAGE

REGULATOR

Gnd

4

AYW

375xx

123

V

ON/OFF

in

1

Input

2

Gnd

3

Gnd

ON/OFF

4

A = Manufacturing Code
YW = Date
xx = Version

V

out

4

1

3

PLASTIC

ST SUFFIX

CASE 318E

ALYW
375xx

8

Output

7

Gnd

6

Gnd

5

N/C

Thermal &

Anti–sat

On/Off

On/Off

Block

This document contains information on a new product. Specifications and information
herein are subject to change without notice.

 Semiconductor Components Industries, LLC, 2000

March, 2000 – Rev . 4

1.23 V
V. Ref.

Protection

Rint

54 K

Gnd

This device contains 41 active transistors

1 Publication Order Number:

Pins 4 and 5 Not Connected
AL = Manufacturing Code

YW = Date
xx = Version

8

1

PLASTIC

D SUFFIX

CASE 751

ORDERING INFORMATION

See detailed ordering and shipping information in the
package dimensions section on page 10 of this data sheet.

MC33375/D

MC33375

ELECTRICAL CHARACTERISTICS (C

Characteristic

Output Voltage IO = 0 mA to 250 mA

1.8 V Suffix T

2.5 V Suffix

3.0 V Suffix

3.3 V Suffix

5.0 V Suffix

1.8 V Suffix V

2.5 V Suffix 2% Tolerance from T

3.0 V Suffix

3.3 V Suffix

5.0 V Suffix

Line Regulation Vin = [VO + 1] V to 12 V, IO = 250 mA,

Load Regulation Vin = [VO + 1] V, IO = 0 mA to 250 mA,

Dropout Voltage

= 10 mA TJ = –40°C to +125°C

I

O

I

= 100 mA

O

= 250 mA

I

O

= 300 mA

I

O

Ripple Rejection (120 Hz) V
Output Noise Voltage

C

= 1 mFI

L

C

= 200 mF

L

= 25°C, Vin = [VO + 1] V

A

= [VO + 1] V, 0 < IO < 100 mA

in

All Suffixes T

All Suffixes T

= 50 mA (10 Hz to 100 kHz)

O

= 25°C

A

= 25°C

A

in(peak–peak)

= 1.0µF, TA = 25°C, for min/max values TJ = –40°C to +125°C, Note 1)

L

Symbol Min Typ Max Unit

V

= –40 to +125°C

J

O

Reg

Reg

load

Vin – V

line

1.782

2.475

2.970

3.267

4.950

1.764

2.450

2.940

3.234

4.900

1.80

2.50

3.00

3.30

5.00

—
—
—
—
—

1.818

2.525

3.030

3.333

5.05

1.836

2.550

3.060

3.366

5.100

– 2.0 10 mV

– 5.0 25 mV

O

—
—
—
—

25
115
220
260

100
200
400
500

= [VO + 1.5] V to [VO + 5.5] V — 65 75 — dB

V

n

—
—

160

46

—
—

CURRENT PARAMETERS

Quiescent Current

On Mode V

= [VO + 1] V, IO = 0 mA

in

Off Mode
On Mode SAT V

= [VO – 0.5] V, IO = 0 mA, Note 2

in

Current Limit Vin = [VO + 1] V, VO shorted I

I

Q

LIMIT

—
—
—

125

0.3

1100

200

4.0

1500

— 450 — mA

ON/OFF INPUTS

On/Off Input Voltage

Logic “1” (Regulator On) V
Logic “0” (Regulator Off) V
Logic “0” (Regulator Off) V

= VO ± 2%

out

< 0.03V

out

< 0.05V (1.8 V Option)

out

V

CTRL

2.4
—
—

—
—
—

—

0.5

0.3

THERMAL SHUTDOWN

Thermal Shutdown — — 150 — °C

NOTE: 1. Low duty pulse techniques are used during test to maintain junction temperature as close to ambient as possible.

NOTE: 2. Quiescent Current is measured where the PNP pass transistor is in saturation. V

= [VO – 0.5] V guarantees this condition.

in

Vdc

mV

m

Vrms

m

A

V

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2

MC33375

DEFINITIONS

Load Regulation – The change in output voltage for a

change in load current at constant chip temperature.

Dropout V oltage – 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
output power (V

out

X I

out

) is increasing.

X ICC) and the

CC

Depending on ambient temperature, it is possible to
calculate the maximum power dissipation and so the
maximum current as following:

TJ–T

Pd

+

A

R

q

JA

The maximum operating junction temperature TJ is
specified at 150°C, if TA = 25°C, then PD can be found. By
neglecting the quiescent current, the maximum power
dissipation can be expressed as:

P

I

out

+

D

VCC–V

out

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.

TJ–T

R

+

q

JA

A

P

D

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3

MC33375

Figure 1. Line Transient Response Figure 2. Line Transient Response

7

TA = 25° C

6

= 0.47 mF

C
IL = 10 mA
V

5

L

= 3.3 V

out

V

in

4
3

, INPUT VOLTAGE (V)

2

in

V

V

out

1
0

0

20 40 60 80 100 120 140 160 180 200

TIME (mS)

Figure 3. Load Transient Response

300

–100
–200

–300
–400

LOAD CURRENT (mA)

–500
–600
–700

200
100

0

CL = 1.0 mF
V

= 3.3 V

out

TA = 25° C
Vin = 4.3 V

0

50 100 150 200 250 400

LOAD CURRENT

V

CHANGE

out

TIME (mS)

300 350

200

OUTPUT VOLTAGE CHANGE (mV)

150

100

50

0

–50

–100

1.0

0.8
OUTPUT VOLTAGE CHANGE (V)

0.6

0.4

0.2

0

–0.2
–0.4
–0.6
–0.8
–1.0

7

TA = 25° C

6

C

= 33 mF
IL = 10 mA
V

5

L

out

= 3.3 V

V

in

4
3

2

, INPUT VOLTAGE (V)

in

V

1

V

out

0

0

50 100 150 200

TIME (mS)

Figure 4. Load Transient Response

350
250
150

50

–50
–150
–250
–350
–450

LOAD CURRENT (mA)

–550
–650

–750

0 250 300

LOAD CURRENT

V

CHANGE

out

50 100 150

TIME (mS)

200

CL = 33.0mF
V

out

T

= 25° C

A

Vin = 4.3 V

= 3.3 V

70

OUTPUT VOLTAGE CHANGE (mV)

60
50
40

30
20
10
0

–10
–20

0.14

OUTPUT VOLTAGE CHANGE (V)

0.09

0.04

–0.01

–0.06

–0.11

–0.16

Figure 5. Output Voltage versus Input Voltage

3.5

OUTPUT VOLTAGE (V)

3.0

2.5

2.0

1.5

1.0

0.5
0

0.5

0

1.0

IL = 1 mA

1.5 2.0

2.5

INPUT VOLTAGE (V)

IL = 250 mA

3.0 3.5 4.0

Figure 6. Dropout Voltage versus Output Current

300

250

200

150

100

DROPOUT VOLTAGE (mV)

50

0

4.5

5.0

1

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4

10 100 1000

IO, OUTPUT CURRENT (mA)

MC33375

Figure 7. Dropout V oltage versus Temperature

300

DROPOUT VOLTAGE (mV)

250

200

150

100

50

0

–40

IL = 300 mA

IL = 250 mA

IL = 100 mA

IL = 10 mA

02585

TEMPERATURE (°C)

Figure 9. Ground Pin Current versus

Ambient Temperature

8
7
6
5

(mA)

4

gnd

I

3
2
1

0

–40

–20

20

0

60 80 100

40

TA (°C)

IL = 250 mA

IL = 100 mA

IL = 50 mA

120

140

gnd

I (mA)

(VOLTS)

out

V

12

10

2.5

2.495

2.49

2.485

2.48

2.475

2.47

Figure 8. Ground Pin Current versus

Input Voltage

8

6

4

2

0

0

1

IL = 300 mA

IL = 100 mA

= 50 mA

I

L

23 8

4567

(VOLTS)

V

in

Figure 10. Output V oltage versus Ambient

–40

T emperature (V

02585

TEMPERATURE (°C)

= V

in

IO = 0

IO = 250 mA

out

+ 1V)

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5

MC33375

Figure 11. Output Voltage versus Ambient

2.5

2.495

2.49

T emperature (V

IO = 0

= 12 V)

in

dB

–40

IO = 250 mA

02585

TEMPERATURE (°C)

(VOLTS)

out

V

2.485

2.48

2.475

2.47

2.465

Figure 12. Ripple Rejection Figure 13. Ripple Rejection

dB

70
60
50
40
30
20
10

0

0.1

IL = 250 mA

1 10 100

FREQUENCY (kHz)

IL = 100 mA

70
60
50
40
30
20
10

0

0.1

1 10 100

IL = 1 mA

FREQUENCY (kHz)

IL = 10 mA

4.5

3.5

2.5

VOLTAGE (V)

1.5

0.5

Figure 14. Enable Transient

5

4

3

2

1

0

0

CL = 1.0 mF

CL = 33 mF

TIME (mS)

ENABLE

300

500100 200 400

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6

MC33375

1.8 V Option

Figure 15. Output V oltage versus Temperature Figure 16. Output V oltage versus Input Voltage

1.85

1.84

1.83

1.82

1.81

1.80

1.79

, OUTPUT VOLTAGE (V)

1.78

OUT

1.77

V

1.76

1.75

, (mA)

gnd

I

I

–20 0 20 40 60 80 100 120

–40

TA, AMBIENT TEMPERATURE (°C)

Figure 17. Ground Current versus Load

12

10

8

6

4

2
0

0

TA = 25° C
VCC = 3 V

50 100 150 200 250 300 350

Current

I

, (mA)

LOAD

LOAD

= 100 mA

2.0

1.8

1.6

1.4

1.2

1.0

0.8

, OUTPUT VOLTAGE (V)

0.6

OUT

0.4

V

0.2
0

0

1346

2

VCC, (V)

TA = 25° C
I

= 0 mA

LOAD

5

Figure 18. Quiescent Current versus Input V oltage

140
120
100

80

m

( A)

Q

I

60
40
20

0

0

1346

2

VCC, (V)

TA = 25° C
I

= 0 mA

LOAD

5

80
70
60
50
40

PSRR (dB)

30
20
10

0

0.1

Figure 19. PSRR versus Frequency

110

f, FREQUENCY (kHz)

100 1000

0 5 10 15 20 25 30 35 40 45 50

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7

VCC = 3 V
I

= 1 mA

LOAD

TA = 25°C

= 1 mF

C

OUT

Figure 20. Enable Response

2 V

0 V

t, TIME (ms)

ENABLE

V

OUT

MC33375

SR

ohm

0

Figure 21. Load Transient Response

VCC = 3 V
I

= 1 mA to 100 mA

LOAD

T

= 25°C

A

1.82 V

1.80 V

1.78 V
100 mA

1 mA

0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5

t, TIME (ms)

APPLICATIONS INFORMATION

Figure 22. T ypical Application Circuit

ON/OFF

V

in

MC33375–xx

C

in

The MC33375 regulators are designed with internal
current limiting and thermal shutdown making them
user–friendly . Figure 15 is a typical application circuit. The
output capability of the regulator is in excess of 300 mA,
with a typical dropout voltage of less than 260 mV. Internal
protective features include current and thermal limiting.

EXTERNAL CAPACITORS

These regulators require only a 0.33 mF (or greater)
capacitance between the output and ground for stability for

1.8 V, 2.5 V , 3.0 V, and 3.3 V output voltage options. Output
voltage options of 5.0 V require only 0.22 mF for stability.
The output capacitor must be mounted as close as possible
to the MC33375. If the output capacitor must be mounted
further than two centimeters away from the MC33375, then
a larger value of output capacitor may be required for
stability . A value of 0.68 mF or larger is recommended. Most
type of aluminum, tantalum, or multilayer ceramic will
perform adequately. Solid tantalums or appropriate
multilayer ceramic capacitors are recommended for
operation below 25°C. An input bypass capacitor is
recommended to improve transient response or if the
regulator is connected to the supply input filter with long
wire lengths, more than 4 inches. This will reduce the
circuit’s sensitivity to the input line impedance at high

V

out

out

GND

LOADC

frequencies. A 0.33 mF or larger tantalum, mylar, ceramic,
or other capacitor having low internal impedance at high
frequencies should be chosen. The bypass capacitor should
be mounted with shortest possible lead or track length
directly across the regulator’s input terminals. Figure 16
shows the ESR that allows the LDO to remain stable for
various load currents.

Figure 23. ESR for V

100

)

10
(
E

1.0

0.1
0

50 150 250

Stable Region

100 200 30

LOAD CURRENT (mA)

Applications should be tested over all operating

conditions to insure stability .

out

= 3.0V

V

out

C

out

C

= 1.0mF

in

= 3.0 V
= 1.0mF

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8

MC33375

THERMAL PROTECTION

Internal thermal limiting circuitry is provided to protect
the integrated circuit in the event that the maximum junction
temperature is exceeded. When activated, typically at
150°C, the output is disabled. There is no hysteresis built
into the thermal protection. As a result the output will appear
to be oscillating during thermal limit. The output will turn
off until the temperature drops below the 150°C then the
output turns on again. The process will repeat if the junction
increases above the threshold. This will continue until the
existing conditions allow the junction to operate below the
temperature threshold.

Thermal limit is not a substitute for proper

heatsinking.

Figure 24. SOT–223 Thermal Resistance and Maximum

Power Dissipation versus P.C.B. Copper Length

280

240

200

160

Free Air
Mounted
Vertically

Minimum
Size Pad

The internal current limit will typically limit current to

450 mA. If during current limit the junction exceeds 150°C,
the thermal protection will protect the device also. Current

limit is not a substitute for proper heatsinking.

OUTPUT NOISE

In many applications it is desirable to reduce the noise
present at the output. Reducing the regulator bandwidth by
increasing the size of the output capacitor will reduce the
noise on the MC33375.

ON/OFF PIN

When this pin is pulled low , the MC33375 is off. This pin
should not be left floating. The pin should be pulled high for
the MC33375 to operate.

P

D(max)

for TA = 50°C

2.0 oz. Copper
L

L

2.50

1.25

0.83

0.63

120

JAθ

JUNCTION-TO-AIR ( C/W)°

R , THERMAL RESISTANCE

80
40

010203025155.0
L, LENGTH OF COPPER (mm)

R

θ

JA

Figure 25. SOP–8 Thermal Resistance and Maximum

Power Dissipation versus P.C.B. Copper Length

170
150
130

JUNCTION-TO-AIR ( C/W)°

110

90
70
50

30

02040503010

JAθ

R , THERMAL RESISTANCE,

R

θ

JA

L, LENGTH OF COPPER (mm)

P

for TA = 50°C

D(max)

Graph Represents Symmetrical Layout

2.0 oz.

L

Copper

L

3.0 mm

0.50

0.42

0.35

3.2

2.8

2.4

2.0

1.6

1.2

0.8

0.4

, MAXIMUM POWER DISSIPATION (W)

D

P

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9

MC33375

ORDERING INFORMATION

MC33375ST–1.8T3 1.8 V (Fixed V) 318E SOT–223
MC33375ST–2.5T3
MC33375D–2.5R2
MC33375ST–3.0T3
MC33375D–3.0R2
MC33375ST–3.3T3
MC33375D–3.3R2
MC33375ST–5.0T3
MC33375D–5.0R2

DEVICE MARKING

Device Version Marking (1st line)

MC33375 1.8V 37518
MC33375 2.5V 37525
MC33375 3.0V 37530
MC33375 3.3V 37533
MC33375 5.0V 37550

2.5 V

(Fixed Voltage)

3.0 V 1% T olerance

(Fixed Voltage) at TA = 25°C

3.3 V 2% Tolerance at

(Fixed Voltage) TJ from –40 to +125°C

5.0 V

(Fixed Voltage)

318E SOT–223

751–5 SOP–8

318E SOT–223

751–5 SOP–8

318E SOT–223

751–5 SOP–8

318E SOT–223

751–5 SOP–8

TAPE AND REEL SPECIFICATIONS

Device Reel Size Tape W idth Quantity

MC33375D 13” 12mm embossed tape 2500 units

MC33375ST 13” 8mm embossed tape 4000 units

MAXIMUM RATINGS (T

Input Voltage V
Power Dissipation and Thermal Characteristics

= 25°C

T

A

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 I
Maximum Junction Temperature T
Operating Junction Temperature Range T
Storage Temperature Range T

= 25°C, for min/max values TJ = –40°C to +125°C)

A

Rating Symbol Value Unit

CC

P

D

R

θ

JA

R

θ

JC

R

θ

JA

R

θ

JC

O

J
J

stg

13 Vdc

Internally Limited

160

25

245

15
300 mA
150 °C

– 40 to +125 °C
– 65 to +150 °C

W

°C/W
°C/W

°C/W
°C/W

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10

0.08 (0003)

S

L

H

A

F

4

123

G

MC33375

P ACKAGE DIMENSIONS

ST SUFFIX

PLASTIC PACKAGE

CASE 318E–04

(SOT–223)

ISSUE J

B

D

C

M

NOTES:

1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.

2. CONTROLLING DIMENSION: INCH.

INCHES

DIMAMIN MAX MIN MAX

0.249 0.263 6.30 6.70

B 0.130 0.145 3.30 3.70
C 0.060 0.068 1.50 1.75
D 0.024 0.035 0.60 0.89
F 0.115 0.126 2.90 3.20
G 0.087 0.094 2.20 2.40
H 0.0008 0.0040 0.020 0.100

J

J 0.009 0.014 0.24 0.35
K 0.060 0.078 1.50 2.00
L 0.033 0.041 0.85 1.05
M 0 10 0 10

____

S 0.264 0.287 6.70 7.30

MILLIMETERS

K

A

C

E

B

A1

D SUFFIX

PLASTIC PACKAGE

CASE 751–06

(SOP–8)
ISSUE T

D

58

0.25MB

1

H

4

e

M

h

X 45

_

q

C

A

SEATING
PLANE

0.10

L

B

SS

A0.25MCB

NOTES:

1. DIMENSIONING AND TOLERANCING PER ASME
Y14.5M, 1994.

2. DIMENSIONS ARE IN MILLIMETER.

3. DIMENSION D AND E DO NOT INCLUDE MOLD
PROTRUSION.

4. MAXIMUM MOLD PROTRUSION 0.15 PER SIDE.

5. DIMENSION B DOES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.127 TOTAL IN EXCESS
OF THE B DIMENSION AT MAXIMUM MATERIAL
CONDITION.

MILLIMETERS

DIM MIN MAX

A 1.35 1.75

A1 0.10 0.25

B 0.35 0.49
C 0.19 0.25
D 4.80 5.00
E

3.80 4.00

1.27 BSCe

H 5.80 6.20
h

0.25 0.50

L 0.40 1.25

0 7

q

__

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11

MC33375

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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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SCILLC and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable
attorney fees arising out of, directly or indirectly , any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim
alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer .

PUBLICATION ORDERING INFORMATION

NORTH AMERICA Literature Fulfillment:

Literature Distribution Center for ON Semiconductor
P.O. Box 5163, Denver, Colorado 80217 USA

Phone: [phone] or 800–344–3860 Toll Free USA/Canada
Fax: [phone] or 800–344–3867 Toll Free USA/Canada
Email: [e-mail]

Fax Response Line: 303–675–2167 or 800–344–3810 T oll Free USA/Canada

N. American Technical Support: 800–282–9855 Toll Free USA/Canada
EUROPE: LDC for ON Semiconductor – European Support

German Phone: [phone] (M–F 1:00pm to 5:00pm Munich T ime)

Email: ONlit–[e-mail]

French Phone: [phone] (M–F 1:00pm to 5:00pm Toulouse Time)

Email: ONlit–[e-mail]

English Phone: [phone] (M–F 12:00pm to 5:00pm UK T ime)

Email: [e-mail]

EUROPEAN TOLL–FREE ACCESS*: 00–800–4422–3781

*Available from Germany, France, Italy, England, Ireland

CENTRAL/SOUTH AMERICA:

Spanish Phone: [phone] (Mon–Fri 8:00am to 5:00pm MST)

Email: ONlit–[e-mail]

ASIA/PACIFIC : LDC for ON Semiconductor – Asia Support

Phone: [phone] (Tue–Fri 9:00am to 1:00pm, Hong Kong Time)

T oll Free from Hong Kong & Singapore:

001–800–4422–3781

Email: ONlit–[e-mail]

JAPAN: ON Semiconductor, Japan Customer Focus Center

4–32–1 Nishi–Gotanda, Shinagawa–ku, T okyo, Japan 141–8549

Phone: [phone]
Email: [e-mail]

ON Semiconductor Website: http://onsemi.com

For additional information, please contact your local
Sales Representative.

http://onsemi.com

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