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MC33375 Preliminary 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. Additionally, the MC33375 is available with an active HIGH off and LOW controls that allows a logic level signal to turn-off or turn-on the regulator output. (125 mA Quiescent Current in the On Mode, 0.3 mA in the Off Mode) 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 DROPOUT MICROPOWER VOLTAGE REGULATOR WITH ON/OFF CONTROL
SEMICONDUCTOR TECHNICAL DATA
Gnd
4 4
* * * * * *
MC33375
1 2 3
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
Vin On/Off Vout
1 3
ST SUFFIX PLASTIC PACKAGE CASE 318E-04 (SOT-223)
1
8
Input
2 7
Output Gnd
3
Gnd Gnd On/Off
4
MC33375
6
Gnd
5
8 1
N/C
Simplified Block Diagram
Vin Cin On/Off Protection Circuit On/Off Block 1.23 V V. Ref. Rint Vout Cout
D SUFFIX PLASTIC PACKAGE CASE 751-06 (SOP-8)
54 K Gnd
This device contains 41 active transistors
This document contains information on a product under development. Motorola reserves the right to change or discontinue this product without notice. (c) Motorola, Inc. 1998 Rev 0
MOTOROLA ANALOG IC DEVICE DATA
1
MC33375
ORDERING INFORMATION
Operating Temperature Range, Tolerance
Device MC33375ST-2.5 MC33375D-2.5 MC33375ST-3.0 MC33375D-3.0 MC33375ST-3.3 MC33375D-3.3 MC33375ST-5.0 MC33375D-5.0
Type 2.5 V (Fixed Voltage) 3.0 V (Fixed Voltage) 3.3 V (Fixed Voltage) 5.0 V (Fixed Voltage)
Case 318E 751-5
Package SOT-223 SOP-8 SOT-223 SOP-8 SOT-223 SOP-8 SOT-223 SOP-8
1% Tolerance at TA = 25C 2% Tolerance at TJ from -40 to +125C
318E 751-5 318E 751-5 318E 751-5
MAXIMUM RATINGS (TA = 25C, for min/max values TJ = -40C to +125C, Note 1)
Rating Input Voltage Power Dissipation and Thermal Characteristics TA = 25C 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 Junction Temperature Range Storage Temperature Range Symbol VCC Value 13 Unit Vdc
PD RJA RJC RJA RJC IO TJ TJ Tstg
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
NOTE: 1. Low duty pulse techniques are used during test to maintain junction temperature as close to ambient as possible. NOTE: 2. Before Thermal Shutdown.
DEVICE MARKING
Device MC33375 MC33375 MC33375 MC33375 Type inhibit inhibit inhibit inhibit Version 2.5 V 3.0 V 3.3 V 5.0 V Marking (1st Line) 37525 37530 37533 37550
2
MOTOROLA ANALOG IC DEVICE DATA
MC33375
ELECTRICAL CHARACTERISTICS (TA = 25C, for min/max values TJ = -40C to +125C, Note 1)
Characteristic Output Voltage 2.5 V Suffix 3.0 V Suffix 3.3 V Suffix 5.0 V Suffix 2.5 V Suffix 3.0 V Suffix 3.3 V Suffix 5.0 V Suffix Line Regulation Load Regulation Dropout Voltage IO = 10 mA IO = 100 mA IO = 250 mA IO = 300 mA Ripple Rejection (1 kHz) Output Noise Voltage CL = 1 mF CL = 200 mF IO = 0 mA to 250 mA TA = 25C, Vin = [VO + 1] V Symbol VO 2.475 2.970 3.267 4.950 2.450 2.940 3.234 4.900 Regline Regload Vin - VO TJ = -40C to +125C -- -- -- -- -- Vn IO = 50 mA (10 Hz to 100 kHz), Vin = [VO + 1] V -- -- 160 46 -- -- 65 25 115 220 260 75 100 200 400 500 -- dB - - 2.50 3.00 3.30 5.00 -- -- -- -- 2.0 5.0 2.525 3.030 3.333 5.50 2.550 3.060 3.366 5.100 10 25 mV mV mV Min Typ Max Unit Vdc
Vin = [VO + 1] V, 0 < IO < 100 mA 2% Tolerance from TJ = -40 to +125C
Vin = [VO + 1] V to 12 V, IO = 250 mA, All Suffixes TA = 25C Vin = [VO + 1] V, IO = 0 mA to 250 mA, All Suffixes TA = 25C
Vin(peak-peak) = [VO + 1.5] V to [VO + 5.5] V
mVrms
CURRENT PARAMETERS
Characteristic Quiescent Current On Mode Off Mode On Mode SAT Current Limit Vin = [VO + 1] V, IO = 0 mA Vin = [VO - 0.5] V, IO = 0 mA, Note 2 Vin = [VO + 1], VO shorted, TA = 25C ILIMIT Symbol IQ -- -- -- -- 125 0.3 1100 450 200 4.0 1500 -- mA Min Typ Max Unit
mA
ON/OFF INPUTS
Characteristic On/Off Input Voltage Logic "1" (Regulator On) Logic "0" (Regulator Off) Pin 4 tied to the ground Symbol VOn/Off 2.4 -- -- -- -- 0.3 Min Typ Max Unit V
THERMAL SHUTDOWN
Characteristic Thermal Shutdown Symbol -- Min -- Typ 150 Max -- Unit 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. Vin = VO - 0.5 V guarantees this condition.
MOTOROLA ANALOG IC DEVICE DATA
3
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. Thermal Protection - Internal thermal shutdown circuitry is provided to protect the integrated circuit in the event that the maximum junction temperature is exceeded. When activated, typically 150C, the regulator turns off. This feature is provided to prevent catastrophic failures from accidental overheating. 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. 125C. 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: Pd J + TR - TA
qJA
The maximum operating junction temperature TJ is specified at 125C, if TA = 25C, then PD can be found. By neglecting the quiescent current, the maximum power dissipation can be expressed as: P D - Vout CC The maximum power dissipation supported by the device is a lot increased when using appropriate application design. Mounting pad configuration on the PCB, the board material and also the ambient temperature are affected the rate of temperature rise. It means that when the IC has good thermal conductivity through PCB, the junction temperature will be "low" even if the power dissipation is great. 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 (150C for MC33375) and ambient temperature. I out R
+V
qJA
+ TJP- TA
D
4
MOTOROLA ANALOG IC DEVICE DATA
MC33375
APPLICATIONS INFORMATION
INTRODUCTION The MC33375 regulators are designed with internal current limiting and thermal shutdown making them user-friendly. These regulators require only a 0.33 mF (or greater) capacitance between the output terminal and ground for stability for 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 MC33275. If the output capacitor must be mounted further than two centimeters away from the MC33275, then a larger value of output capacitor may be required for stability. A value of 0.68 mF or larger is recommended. Most types of aluminum, tantalum or multilayer ceramic will perform adequately. Solid tantalums or appropriate multilayer ceramic capacitors are recommended for operation below 25C. A bypass capacitor is recommended across the MC33375 input to ground if more than 4 inches of wire connects the input to either a battery or power supply filter capacitor. ON/OFF CONTROL On/Off control of the regulator may be accomplished in the following way. Pin 4 of the SOP-8 may be turned off if PIN 4 is tied to circuit ground. The regulator will be turned on when more than 2.4 V are applied to PIN 4, typically Vout with respect to ground, sourcing a typical current of 6.0 mA. The regulator will turn off if the control input is a logic "0" (<0.3 V).
Figure 1. SOT-223 Thermal Resistance and Maximum Power Dissipation versus P.C.B. Copper Length
Free Air Mounted Vertically PD(max) for TA = 50C 2.0 oz. Copper L 1.25 0.83 0.63 0.50 0.42 0.35 0 5.0 10 15 20 25 30 L, LENGTH OF COPPER (mm) PD, MAXIMUM POWER DISSIPATION (W) 280 R JA, THERMAL RESISTANCE JUNCTION-TO-AIR (C/W) 240 200 160 120 80 40 Minimum Size Pad 2.50
RJA
Figure 2. SOP-8 Thermal Resistance and Maximum Power Dissipation versus P.C.B. Copper Length
170 R JA, THERMAL RESISTANCE JUNCTION-TO-AIR (C/W) 150 130 110 90 70 50 30 0 10 RJA PD(max) for TA = 50C 3.2 2.8 2.4 Graph Represents Symmetrical Layout 2.0
20
L, LENGTH OF COPPER (mm)
MOTOROLA ANALOG IC DEVICE DATA
IIIIIIII IIIIIIII IIIIIIII
L
2.0 oz. Copper L
30
IIII IIII IIII
L 3.0 mm 40 50
1.6 1.2 0.8 0.4
5
MC33375
OUTLINE DIMENSIONS
D SUFFIX PLASTIC PACKAGE CASE 751-06 (SOP-8) ISSUE T
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. DIM A A1 B C D E e H h L MILLIMETERS MIN MAX 1.35 1.75 0.10 0.25 0.35 0.49 0.19 0.25 4.80 5.00 3.80 4.00 1.27 BSC 5.80 6.20 0.25 0.50 0.40 1.25 0_ 7_
A
8
D
5
C
E
1 4
H
0.25
M
B
M
h B C e A
SEATING PLANE
X 45 _
q
L 0.10 A1 B 0.25
M
CB
S
A
S
q
A F
ST SUFFIX PLASTIC PACKAGE CASE 318E-04 (SOT-223) ISSUE J
NOTES: 1 DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2 CONTROLLING DIMENSION: INCH.
4
S
1 2 3
B
D L G J C 0.08 (0003) H M K
INCHES DIM MIN MAX A 0.249 0.263 B 0.130 0.145 C 0.060 0.068 D 0.024 0.035 F 0.115 0.126 G 0.087 0.094 H 0.0008 0.0040 J 0.009 0.014 K 0.060 0.078 L 0.033 0.041 M 0_ 10 _ S 0.264 0.287
MILLIMETERS MIN MAX 6.30 6.70 3.30 3.70 1.50 1.75 0.60 0.89 2.90 3.20 2.20 2.40 0.020 0.100 0.24 0.35 1.50 2.00 0.85 1.05 0_ 10 _ 6.70 7.30
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MOTOROLA ANALOG IC DEVICE DATA
MC33375
Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. "Typical" parameters which may be provided in Motorola data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including "Typicals" must be validated for each customer application by customer's technical experts. Motorola does not convey any license under its patent rights nor the rights of others. Motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the Motorola product could create a situation where personal injury or death may occur. Should Buyer purchase or use Motorola products for any such unintended or unauthorized application, Buyer shall indemnify and hold Motorola 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 Motorola was negligent regarding the design or manufacture of the part. Motorola and are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal Opportunity/Affirmative Action Employer.
MOTOROLA ANALOG IC DEVICE DATA
7
MC33375
Mfax is a trademark of Motorola, Inc. How to reach us: USA / EUROPE / Locations Not Listed: Motorola Literature Distribution; P.O. Box 5405, Denver, Colorado 80217. 1-303-675-2140 or 1-800-441-2447 Customer Focus Center: 1-800-521-6274 MfaxTM: RMFAX0@email.sps.mot.com - TOUCHTONE 1-602-244-6609 ASIA/PACIFIC: Motorola Semiconductors H.K. Ltd.; 8B Tai Ping Industrial Park, Motorola Fax Back System - US & Canada ONLY 1-800-774-1848 51 Ting Kok Road, Tai Po, N.T., Hong Kong. 852-26629298 - http://sps.motorola.com/mfax/ HOME PAGE: http://motorola.com/sps/ JAPAN: Nippon Motorola Ltd.; SPD, Strategic Planning Office, 141, 4-32-1 Nishi-Gotanda, Shinagawa-ku, Tokyo, Japan. 81-3-5487-8488
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MC33375/D MOTOROLA ANALOG IC DEVICE DATA

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