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

MC33375

Advance Information

Low Dropout 300 mA 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 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 mA in OFF mode; 125 mA in ON mode)

•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

•Logic Level ON/OFF Control

Simplified Block Diagram

Vin				Vout

On/Off

	On/Off			1.23 V
	Block			V. Ref.

Thermal &

Anti±sat

Protection

Rint

54 K

Gnd

This device contains 41 active transistors

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

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LOW DROPOUT

MICROPOWER VOLTAGE

REGULATOR

Gnd

4

	AYW	A = Manufacturing Code
		YW = Date
	375xx
		xx = Version

1

2

3

Vin ON/OFF Vout

		4
		1
		3
		PLASTIC
		ST SUFFIX
		CASE 318E
	1		8
	Input		Output
	2		7
	Gnd	ALYW	Gnd
	3	375xx	6
	Gnd		Gnd
	4		5
	ON/OFF		N/C

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.

Semiconductor Components Industries, LLC, 2000	1	Publication Order Number:
March, 2000 ± Rev. 4		MC33375/D

MC33375

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
1.8 V Suffix	TA = 25°C, Vin = [VO + 1] V					1.782	1.80	1.818
2.5 V Suffix						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
1.8 V Suffix	Vin = [VO + 1] V, 0 < IO < 100 mA					1.764	Ð	1.836
2.5 V Suffix	2% Tolerance from TJ = ±40 to +125°C					2.450	Ð	2.550
3.0 V Suffix						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	mVrms
CL = 1 mF	IO = 50 mA (10 Hz to 100 kHz)
CL = 200 mF						Ð	46	Ð
CURRENT PARAMETERS
Quiescent Current	Vin = [VO + 1] V, IO = 0 mA				IQ	Ð	125	200	mA
On Mode
Off Mode						Ð	0.3	4.0
On Mode SAT	Vin = [VO ± 0.5] V, IO = 0 mA, Note 2					Ð	1100	1500
Current Limit	Vin = [VO + 1] V, VO shorted				ILIMIT	Ð	450	Ð	mA
ON/OFF INPUTS
On/Off Input Voltage				± 2%	VCTRL				V
Logic ª1º (Regulator On) V		= V	O			2.4	Ð	Ð
	out
Logic ª0º (Regulator Off) V		< 0.03V				Ð	Ð	0.5
	out
Logic ª0º (Regulator Off) V		< 0.05V (1.8 V Option)				Ð	Ð	0.3
	out
THERMAL SHUTDOWN
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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MC33375

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 MC33375) and ambient temperature.

	RqJA	+	TJ ± TA
			PD

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MC33375

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

																	200			7																										70
																	150	OUTPUT		6																										60
					Vin														(V)																											50
																				5
																	100	VOLTAGE	VOLTAGE	4																										40
																	50																													30
																	0	CHANGE	INPUT,	3																										20
					Vout															2																										0
																			in
																																														10
																	±50	(mV)	V	1																										±10
																				0
																	±100																													±20
60		80		100				120		140		160		180		200				0	50									100									150					200
				TIME (mS)																										TIME (mS)

(mV) CHANGE VOLTAGE OUTPUT

LOAD CURRENT (mA)

Figure 3. Load Transient Response

300																		1.0
																		0.8
200
																		0.4		OUTPUT
0						LOAD CURRENT
100																		0.6
±100																		0.2		VOLTAGE
±200																			0
																		±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)

		350
		250
	(mA)	150
		50
	CURRENT	±50
		±150
		±250
	LOAD	±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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