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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:
MC33375
LOW DROPOUT MICROPOWER VOLTAGE REGULATOR
SEMICONDUCTOR TECHNICAL DATA
Gnd
4 4
MC33375
1 2 3
1 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 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
D SUFFIX PLASTIC PACKAGE CASE 751-06 (SOP-8) Pins 4 and 5 Not Connected
Simplified Block Diagram
Vin Vout
Thermal & Anti-sat Protection On/Off Rint
On/Off Block
1.23 V V. Ref. 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.
(c) Motorola, Inc. 1999
Rev 2, 08,1999
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) (Fi d V lt )
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
DEVICE MARKING
Device MC33375 MC33375 MC33375 MC33375 Version 2.5V 3.0V 3.3V 5.0V Marking (1st line) 37525 37530 37533 37550
TAPE AND REEL SPECIFICATIONS
Device MC33375D MC33375ST Reel Size 13" 13" Tape Width 12mm embossed tape 8mm embossed tape Quantity 2500 units 4000 units
2
MOTOROLA ANALOG IC DEVICE DATA
MC33375
MAXIMUM RATINGS (TA = 25C, for min/max values TJ = -40C to +125C)
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
ELECTRICAL CHARACTERISTICS (CL = 1.0F, 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 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 -- -- 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 5.05 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 Vmax, IO = 250 mA, All Suffixes TA = 25C Vin = [VO + 1] V, IO = 0 mA to 250 mA, All Suffixes TA = 25C
Ripple Rejection (120 Hz)
Vin(peak-peak) = [VO + 1.5] V to [VO + 12] V
Output Noise Voltage CL = 1 mF IO = 50 mA (10 Hz to 100 kHz) CL = 200 mF
mVrms
CURRENT PARAMETERS
Quiescent Current On Mode Vin = [VO + 1] V, IO = 0 mA Off Mode On Mode SAT Vin = [VO - 0.5] V, IO = 0 mA, Note 2 Current Limit Vin = [VO + 1], VO shorted IQ -- -- -- ILIMIT -- 125 0.3 1100 450 200 4.0 1500 -- mA
mA
ON/OFF INPUTS
On/Off Input Voltage Logic "1" (Regulator On) Vout = VO 2% Logic "0" Regulator Off) Vout < 0.03V VOn/Off 2.4 -- -- -- -- 0.5 V
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. 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. 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. 150C. 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 150C, 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 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
Figure 1. Line Transient Response
7 6 Vin , INPUT VOLTAGE (V) 5 4 50 3 2 1 0 0 20 40 60 80 100 120 140 160 180 TIME (mS) 0 Vout -50 -100 200 TA = 25 C CL = 0.47 mF IL = 10 mA Vout = 3.3 V Vin 200 OUTPUT VOLTAGE CHANGE (mV) 150 100 7 TA = 25 C 6 CL = 33 mF IL = 10 mA 5 Vout = 3.3 V 4 3 2 1 0 0 50 100 TIME (mS) 150 Vout Vin
Figure 2. Line Transient Response
70 60 50 40 30 20 10 0 -10 -20 200 OUTPUT VOLTAGE CHANGE (mV)
Vin , INPUT VOLTAGE (V)
Figure 3. Load Transient Response
300 200 100 LOAD CURRENT (mA) 0 -100 -200 -300 -400 CL = 1.0 mF Vout = 3.3 V -500 TA = 25 C -600 Vin = 4.3 V -700 0 50 100 Vout CHANGE LOAD CURRENT 1 0.8 0.6 0.4 0.2 0 -0.2 -0.4 -0.6 -0.8 150 200 250 300 350 -1 400 OUTPUT VOLTAGE CHANGE (V)
350 250 150
Figure 4. Load Transient Response
0.14
OUTPUT VOLTAGE CHANGE (V)
LOAD CURRENT
LOAD CURRENT (mA)
50 -50 -150 -250 -350 -450 -550 -650 -750 0 50 100 150 200 250 300
0.09 0.04 -0.01
Vout CHANGE
CL = 33.0 mF Vout = 3.3 V TA = 25 C Vin = 4.3 V
-0.06 -0.11 -0.16
TIME (mS)
TIME (mS)
Figure 5. Output Voltage versus Input Voltage
3.5 3.0 2.5 IL = 250 mA 2.0 1.5 1.0 0.5 0 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 INPUT VOLTAGE (V) DROPOUT VOLTAGE (mV) OUTPUT VOLTAGE (V) IL = 1 mA
Figure 6. Dropout Voltage versus Output Current
300 250 200 150 100 50 0 1 10 100 1000 IO, OUTPUT CURRENT (mA)
MOTOROLA ANALOG IC DEVICE DATA
5
MC33375
Figure 7. Dropout Voltage versus Temperature
300 250 200 Ignd (mA) 150 100 50 0 -40 IL = 250 mA IL = 100 mA 12 10 8 6 4 IL = 100 mA IL = 10 mA 0 25 TEMPERATURE (C) 85 2 IL = 50 mA 0 0 1 2 3 4 Vin (VOLTS) 5 6 7 8 IL = 300 mA
Figure 8. Ground Pin Current versus Input Voltage
DROPOUT VOLTAGE (mV)
IL = 300 mA
Figure 9. Ground Pin Current versus Ambient Temperature
8 7 6 Ignd (mA) 5 4 3 2 1 0 -40 -20 0 20 40 60 80 IL = 100 mA IL = 50 mA 100 120 140 Vout (VOLTS) 2.49 2.485 2.48 2.475 2.47 -40 IL = 250 mA 2.5 2.495
Figure 10. Output Voltage versus Ambient Temperature (Vin = Vout + 1V)
IO = 0
IO = 250 mA
0
25 TEMPERATURE (C)
85
TA (C)
6
MOTOROLA ANALOG IC DEVICE DATA
MC33375
Figure 11. Output Voltage versus Ambient Temperature (Vin = 12 V)
IO = 0
2.5 2.495 2.49 Vout (VOLTS) 2.485 2.48 2.475 2.47 2.465 -40
IO = 250 mA
0 TEMPERATURE (C)
25
85
Figure 12. Ripple Rejection
70 60 IL = 10 mA 50 IL = 1 mA dB dB 40 30 20 10 0 0.1 1 FREQUENCY (kHz) 10 100 40 30 20 10 0 0.1 50 70 60
Figure 13. Ripple Rejection
IL = 100 mA IL = 250 mA
1 FREQUENCY (kHz)
10
100
Figure 14. Enable Transient
5 4.5 4 VOLTAGE (V) 3.5 3 2.5 2 1.5 1 0.5 0 0 100 200 TIME (mS) 300 400 500 CL = 33 mF CL = 1.0 mF
MOTOROLA ANALOG IC DEVICE DATA
7
MC33375
APPLICATIONS INFORMATION
Figure 15. Typical Application Circuit
ON/OFF Vout MC33375-xx Cin Cout LOAD
Vin
GND
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 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 25C. 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 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 16. ESR for Vout = 3.0V
100 Vout = 3.0 V Cout = 1.0 mF Cin = 1.0 mF ESR (ohm) 10 Stable Region 1.0
Applications should be tested over all operating conditions to insure stability. 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 150C, 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 150C 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. The internal current limit will typically limit current to 450 mA. If during current limit the junction exceeds 150C, 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.
0.1 0 50 100 150 200 250 300 LOAD CURRENT (mA)
8
MOTOROLA ANALOG IC DEVICE DATA
MC33375
Figure 17. 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 PD, MAXIMUM POWER DISSIPATION (W) 280 R JA, THERMAL RESISTANCE JUNCTION-TO-AIR (C/W) 240 200 160 120 80 40 0 5.0 10 15 20 Minimum Size Pad 2.50
RJA
L, LENGTH OF COPPER (mm)
R JA, THERMAL RESISTANCE, JUNCTION-TO-AIR (C/W)
Figure 18. SOP-8 Thermal Resistance and Maximum Power Dissipation versus P.C.B. Copper Length
3.2 PD(max) for TA = 50C 2.8 2.4 Graph Represents Symmetrical Layout 2.0 L RJA
170
150
130
90 70 50 30 0 10 20
L, LENGTH OF COPPER (mm)
MOTOROLA ANALOG IC DEVICE DATA
IIIIIII IIIIIII IIIIIII
110
2.0 oz. Copper L
30
IIII IIII IIII IIII
L 25 30 3.0 mm 40
1.6 1.2 0.8 0.4
50
9
MC33375
OUTLINE DIMENSIONS
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.
A F
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
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
10
MOTOROLA ANALOG IC DEVICE DATA
MC33375
NOTES
MOTOROLA ANALOG IC DEVICE DATA
11
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. 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.; Silicon Harbour Centre, Motorola Fax Back System - US & Canada ONLY 1-800-774-1848 2, Dai King Street, Tai Po Industrial Estate, Tai Po, N.T., Hong Kong. - http://sps.motorola.com/mfax/ 852-26629298 HOME PAGE: http://motorola.com/sps/ JAPAN: Motorola Japan 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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