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

MC33275

Low Dropout 300 mA

Voltage 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 mA)

•Low Input±to±Output Voltage Differential of 25 mV at IO = 10 mA, and 260 mV at IO = 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

Simplified Block Diagram

Vin				Vout

Thermal &

Anti±sat

Protection

Rint

1.23 V

V. Ref.

54 K

Gnd

This device contains 41 active transistors

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LOW DROPOUT

MICROPOWER VOLTAGE

REGULATOR

					Gnd
					4
			4
	1			MC33275
		3		1	2	3
				V	Gnd	V
				in		out
			PLASTIC
			DT SUFFIX
			CASE 369A
				Gnd
				4
			4	MC33375
	1
		3	1	2	3
			Vin	Gnd	Vout
			PLASTIC
			ST SUFFIX
			CASE 318E
			1			8
			Input			Output
			2			7
			Gnd	MC33375		Gnd
8			3			6
			Gnd			Gnd
	1		4			5
			Gnd			N/C

Pins 4 and 5 Not Connected

PLASTIC

D SUFFIX

CASE 751

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	1	Publication Order Number:
March, 2000 ± Rev. 4		MC33275/D

MC33275

MAXIMUM RATINGS (TA = 25°C, for min/max values TJ = ±40°C to +125°C)

Rating

Symbol

Value

Unit

Input Voltage

VCC

13

Vdc

Power Dissipation and Thermal Characteristics

TA = 25°C

PD

Internally Limited

W

Maximum Power Dissipation

Case 751 (SOP±8) D Suffix

Thermal Resistance, Junction±to±Ambient

RθJA

160

°C/W

Thermal Resistance, Junction±to±Case

RθJC

25

°C/W

Case 369A (DPAK) DT Suffix

Thermal Resistance, Junction±to±Air

RθJA

92

°C/W

Thermal Resistance, Junction±to±Case

RθJC

6.0

°C/W

Case 318E (SOT±223) ST Suffix

Thermal Resistance, Junction±to±Air

RθJA

245

°C/W

Thermal Resistance, Junction±to±Case

RθJC

15

°C/W

Output Current

IO

300

mA

Maximum Junction Temperature

TJ

150

°C

Operating Junction Temperature Range

TJ

± 40 to +125

°C

Storage Temperature Range

Tstg

± 65 to +150

°C

ELECTRICAL CHARACTERISTICS (CL = 1.0μF, TA = 25°C, for min/max values TJ = ±40°C to +125°C, Note 1)

Characteristic

Symbol

Min

Typ

Max

Unit

Output Voltage

IO = 0 mA to 250 mA

VO

Vdc

2.5 V Suffix

TA = 25°C, Vin = [VO + 1] V

2.475

2.50

2.525

3.0 V Suffix

2.970

3.00

3.030

3.3 V Suffix

3.267

3.30

3.333

5.0 V Suffix

4.950

5.00

5.05

2.5 V Suffix

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

2.450

Ð

2.550

3.0 V Suffix

2% Tolerance from TJ = ±40 to +125°C

2.940

Ð

3.060

3.3 V Suffix

3.234

Ð

3.366

5.0 V Suffix

4.900

Ð

5.100

Line Regulation

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

Regline

±

2.0

10

mV

All Suffixes TA = 25°C

Load Regulation

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

Regload

±

5.0

25

mV

All Suffixes TA = 25°C

Dropout Voltage

TJ = ±40°C to +125°C

Vin ± VO

mV

IO = 10 mA

Ð

25

100

IO = 100 mA

Ð

115

200

IO = 250 mA

Ð

220

400

IO = 300 mA

Ð

260

500

Ripple Rejection (120 Hz)

Vin(peak±peak) = [VO + 1.5] V to [VO + 5.5] V

Ð

65

75

Ð

dB

Output Noise Voltage

Vn

Ð

160

Ð

mVrm

CL = 1 mF

IO = 50 mA (10 Hz to 100 kHz)

s

CL = 200 mF

Ð

46

Ð

CURRENT PARAMETERS

Characteristic

Symbol

Min

Typ

Max

Unit

Quiescent Current

IQ

mA

On Mode

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

Ð

125

200

On Mode SAT

Vin = [VO ± 0.5] V, IO = 0 mA, Note 2

Ð

1100

1500

Current Limit

Vin = [VO + 1], VO shorted

ILIMIT

Ð

450

Ð

mA

THERMAL SHUTDOWN

Characteristic

Symbol

Min

Typ

Max

Unit

Thermal Shutdown

Ð

Ð

150

Ð

°C

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

2. Quiescent Current is measured where the PNP pass transistor is in saturation. Vin = [VO ± 0.5] V guarantees this condition.

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MC33275

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 (VCC X ICC) and the output power (Vout X Iout) 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 RqJA

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:

	I	out	+	PD
				VCC ± Vout

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.

	RqJA	+	TJ ± TA
			PD

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MC33275

Figure 1. Line Transient Response

Figure 2. Line Transient Response

Vin , INPUT VOLTAGE (V)

7

TA = 25° C

6CL = 0.47 mF IL = 10 mA

5 Vout = 3.3 V

4

3

2

1

0

0 20 40 60

															200	VOLTAGEOUTPUT		7
															0		(V)VOLTAGEINPUT	6
															150
			Vin
															100			5
																		4
															50
																		3
																(mV)CHANGE	V
																		1
																	,	2
			Vout														in
															±50
																		0
															±100
80		100				120		140		160		180		200				0						50					100									150					200
		TIME (mS)																											TIME (mS)

70

60

50

40

30

20

10

0

±10

±20

(mV) CHANGE VOLTAGE OUTPUT

LOAD CURRENT (mA)

Figure 3. Load Transient Response

300																		1.0
																		0.8
200
																		0.6		OUTPUT
0						LOAD CURRENT
100
																		0.4
±100																		0.2		VOLTAGE
																		0
±200
																		±0.2
±300																				CHANGE
							Vout CHANGE
		Vout = 3.3 V																±0.6
±400		CL = 1.0 mF																±0.4
±500		TA = 25° C																		(V)
																		±0.8
±600		Vin = 4.3 V
																		±1.0
±700
		50		100		150		200		250				300		350		400
0

TIME (mS)

LOAD CURRENT (mA)

350

250

150

50

±50

±150

±250

±350

±450

±550

±650

±750

0

Figure 4. Load Transient Response

0.14

OUTPUT

LOAD CURRENT

0.09

VOLTAGE

0.04

±0.01

CHANGE

TA = 25° C

CL = 33.0 mF

Vout CHANGE

±0.06

Vout = 3.3 V

Vin = 4.3 V

±0.11

(V)

±0.16

50

100

150

200

250

300

TIME (mS)

Figure 5. Output Voltage versus Input Voltage

Figure 6. Dropout Voltage versus Output Current

	3.5											300
	3.0				IL = 1 mA						(mV)	250
(V)
	2.5											200
VOLTAGE							IL = 250 mA				VOLTAGE
	2.0											150
OUTPUT	1.5										DROPOUT
	1.0											100
												50
	0.5
	0	0.5		1.5	2.0		3.0	3.5	4.0		5.0	0
	0		1.0			2.5				4.5
					INPUT VOLTAGE (V)

1

10

100

1000

IO, OUTPUT CURRENT (mA)

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