MOTOROLA MC33275DT-3.0, MC33275DT-3.0RK, MC33275DT-3.3, MC33275DT-3.3RK, MC33275D-3.3R2 Datasheet

MC33275

Low Dropout 300 mA V oltage Regulator

The MC33275 series are micropower low dropout voltage regulators available in a wide variety of output voltages as well as packages, DPAK, 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 MC33275 is available as a MC33375 which includes an On/Off control.

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 (125

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

and 260 mV at IO = 300 mA

• Extremely Tight Line and Load Regulation

• Stable with Output Capacitance of only 0.33

Voltage

• Internal Current and Thermal Limiting

m

A)

= 10 mA,

O

m

F for 2.5 V Output

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LOW DROPOUT

MICROPOWER VOLTAGE

REGULATOR

Gnd

4

1

3

PLASTIC

DT SUFFIX

CASE 369A

MC33275

123

Gnd

V

Gnd

V

in

4

out

Simplified Block Diagram

V

in

Thermal &

Anti–sat

Protection

Rint

1.23 V V. Ref.

54 K

This device contains 41 active transistors

Gnd

V

out

1

8

1

3

4

PLASTIC

ST SUFFIX

CASE 318E

Input

Gnd Gnd Gnd

PLASTIC D SUFFIX CASE 751

MC33375

123

V

in

1 2 3

MC33375

4

Pins 4 and 5 Not Connected

Gnd

V

out

8

Output

7

Gnd

6

Gnd

5

N/C

ORDERING INFORMATION

See detailed ordering and shipping information in the package dimensions section on page 9 of this data sheet.

 Semiconductor Components Industries, LLC, 2000

March, 2000 – Rev . 4

1 Publication Order Number:

MC33275/D

MC33275

MAXIMUM RATINGS (T

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

A

Rating

Input Voltage V Power Dissipation and Thermal Characteristics

T

= 25°C

A

Maximum Power Dissipation

Case 751 (SOP–8) D Suffix Thermal Resistance, Junction–to–Ambient Thermal Resistance, Junction–to–Case

Case 369A (DPAK) DT Suffix

Thermal Resistance, Junction–to–Air 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

ELECTRICAL CHARACTERISTICS (C

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

L

Characteristic Symbol Min Typ Max Unit

Output Voltage IO = 0 mA to 250 mA

2.5 V Suffix T

= 25°C, Vin = [VO + 1] V

A

3.0 V Suffix

3.3 V Suffix

5.0 V Suffix

Symbol Value Unit

CC

P

D

R

θ

JA

R

θ

JC

R

θ

JA

R

θ

JC

R

θ

JA

R

θ

JC

O

J J

stg

13 Vdc

Internally Limited

160

25

92

6.0

245

15 300 mA 150 °C

– 40 to +125 °C – 65 to +150 °C

V

O

W

°C/W °C/W

2.475

2.970

3.267

4.950

2.50

3.00

3.30

5.00

2.525

Vdc

3.030

3.333

5.05

2.5 V Suffix V

3.0 V Suffix 2% Tolerance from T

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

I

= 10 mA TJ = –40°C to +125°C

O

= 100 mA

I

O

I

= 250 mA

O

= 300 mA

I

O

Ripple Rejection (120 Hz) V Output Noise Voltage

C

= 1 mFI

L

= 200 mF

C

L

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

in

All Suffixes T

in(peak–peak)

= 50 mA (10 Hz to 100 kHz)

O

A

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

J

= 25°C

= –40 to +125°C

Reg

load

Vin – V

V

n

line

2.450

2.940

3.234

4.900

— — — —

2.550

3.060

3.366

5.100

– 2.0 10 mV

– 5.0 25 mV

O

— — — —

— —

25 115 220 260

160

46

100 200 400 500

— —

CURRENT PARAMETERS

Characteristic Symbol Min Typ Max Unit

Quiescent Current

On Mode V On Mode SAT V

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

in

= [VO – 0.5] V, IO = 0 mA, Note 2

in

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

I

Q

LIMIT

— —

125

1100

200

1500

— 450 — mA

THERMAL SHUTDOWN

Characteristic Symbol Min Typ Max Unit

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

m

mV

Vrm

s

m

A

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2

MC33275

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

) is increasing.

out

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 MC33275) and ambient temperature.

TJ–T

R

+

q

JA

A

P

D

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3

MC33275

OUTPUT

VO

TAG

V

OUTPUT

VO TAG

C ANG

mV

V

INPUT

VO

TAG

V

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

7

TA = 25° C

6

= 0.47 mF

C

) E (

L

,

in

IL = 10 mA V

5 4

3 2

L

= 3.3 V

out

V

in

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

5

L

IL = 10 mA V

= 3.3 V

out

V

in

4 3

, INPUT VOLTAGE (V)

2

in

V

1

V

out

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 60 50 40

L

30

E H

20 10

E (

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

) E (

L

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

5.0

4.5

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4

1

10 100 1000

IO, OUTPUT CURRENT (mA)