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. http://onsemi.com LOW DROPOUT MICROPOWER VOLTAGE REGULATOR Gnd 4 4 Features: • Low Quiescent Current (125 mA) • Low Input–to–Output Voltage Differential of 25 mV at IO = 10 mA, MC33275 1 3 1 2 3 Vin Gnd Vout 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 PLASTIC DT SUFFIX CASE 369A Voltage • Internal Current and Thermal Limiting Gnd 4 Simplified Block Diagram MC33375 4 Vin 1 Vout 1 3 2 Gnd Vin Thermal & Anti–sat Protection 3 Vout PLASTIC ST SUFFIX CASE 318E Rint 1 8 2 7 Output Input 1.23 V V. Ref. Gnd Gnd 3 8 54 K Gnd Gnd 1 Gnd MC33375 4 6 Gnd 5 N/C Pins 4 and 5 Not Connected This device contains 41 active transistors 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 March, 2000 – Rev. 4 1 Publication Order Number: MC33275/D MC33275 MAXIMUM RATINGS (TA = 25°C, for min/max values TJ = –40°C to +125°C) Rating Symbol Value Unit VCC 13 Vdc PD Internally Limited W RθJA RθJC 160 25 °C/W °C/W RθJA RθJC 92 6.0 °C/W °C/W RθJA RθJC 245 15 °C/W °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 Input Voltage Power Dissipation and Thermal Characteristics TA = 25°C 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 ELECTRICAL CHARACTERISTICS (CL = 1.0µF, TA = 25°C, for min/max values TJ = –40°C to +125°C, Note 1) Characteristic Output Voltage 2.5 V Suffix 3.0 V Suffix 3.3 V Suffix 5.0 V Suffix Symbol IO = 0 mA to 250 mA TA = 25°C, Vin = [VO + 1] V Min Typ Max 2.475 2.970 3.267 4.950 2.50 3.00 3.30 5.00 2.525 3.030 3.333 5.05 2.450 2.940 3.234 4.900 — — — — 2.550 3.060 3.366 5.100 VO Unit Vdc 2.5 V Suffix 3.0 V Suffix 3.3 V Suffix 5.0 V Suffix Vin = [VO + 1] V, 0 < IO < 100 mA 2% Tolerance from TJ = –40 to +125°C Line Regulation Vin = [VO + 1] V to 12 V, IO = 250 mA, All Suffixes TA = 25°C Regline – 2.0 10 mV Load Regulation Vin = [VO + 1] V, IO = 0 mA to 250 mA, All Suffixes TA = 25°C Regload – 5.0 25 mV — — — — 25 115 220 260 100 200 400 500 65 75 — Dropout Voltage IO = 10 mA IO = 100 mA IO = 250 mA IO = 300 mA Vin – VO TJ = –40°C to +125°C Ripple Rejection (120 Hz) Vin(peak–peak) = [VO + 1.5] V to [VO + 5.5] V Output Noise Voltage C L = 1 mF CL = 200 mF — mV dB mVrm Vn — — 160 46 — — s Min Typ Max Unit — — 125 1100 200 1500 ILIMIT — 450 — mA Symbol Min Typ Max Unit — — 150 — °C IO = 50 mA (10 Hz to 100 kHz) CURRENT PARAMETERS Characteristic Symbol Quiescent Current On Mode On Mode SAT Vin = [VO + 1] V, IO = 0 mA Vin = [VO – 0.5] V, IO = 0 mA, Note 2 Current Limit Vin = [VO + 1], VO shorted mA IQ THERMAL SHUTDOWN Characteristic Thermal Shutdown 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. http://onsemi.com 2 MC33275 DEFINITIONS 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: 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 Pd + TRJ – TA qJA 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 +V 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 (150°C for MC33275) and ambient temperature. R T –T J A + qJA P D http://onsemi.com 3 MC33275 Figure 1. Line Transient Response Figure 2. Line Transient Response Vin , INPUT VOLTAGE (V) 5 Vin 7 150 TA = 25° C 6 CL = 33 mF IL = 10 mA 5 Vout = 3.3 V 100 4 50 3 0 2 Vout 1 –50 0 –100 0 20 40 60 80 100 120 140 160 180 200 70 60 Vin 40 4 30 20 3 10 2 0 1 Vout 0 50 100 350 0.8 250 0.4 0 0.2 0 –100 –200 –0.2 Vout CHANGE 50 –0.4 –0.6 –0.8 100 150 200 250 300 350 0.14 150 LOAD CURRENT (mA) 0.6 LOAD CURRENT 0 LOAD CURRENT 0.09 50 –50 0.04 –150 –0.01 –250 –350 CL = 33.0 mF Vout = 3.3 V TA = 25° C Vin = 4.3 V Vout CHANGE –450 –550 –0.06 –0.11 –650 –1.0 400 –0.16 –750 0 50 TIME (mS) 100 150 200 250 300 TIME (mS) Figure 5. Output Voltage versus Input Voltage Figure 6. Dropout Voltage versus Output Current 300 3.5 3.0 IL = 1 mA DROPOUT VOLTAGE (mV) OUTPUT VOLTAGE (V) –20 OUTPUT VOLTAGE CHANGE (V) LOAD CURRENT (mA) 1.0 OUTPUT VOLTAGE CHANGE (V) 200 –700 200 Figure 4. Load Transient Response 300 –400 CL = 1.0 mF Vout = 3.3 V –500 TA = 25° C –600 Vin = 4.3 V 150 TIME (mS) Figure 3. Load Transient Response –300 –10 0 TIME (mS) 100 50 OUTPUT VOLTAGE CHANGE (mV) 6 200 OUTPUT VOLTAGE CHANGE (mV) TA = 25° C CL = 0.47 mF IL = 10 mA Vout = 3.3 V Vin , INPUT VOLTAGE (V) 7 2.5 IL = 250 mA 2.0 1.5 1.0 250 200 150 100 50 0.5 0 0 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 1 4.5 5.0 10 100 IO, OUTPUT CURRENT (mA) INPUT VOLTAGE (V) http://onsemi.com 4 1000 MC33275 Figure 8. Ground Pin Current versus Input Voltage Figure 7. Dropout Voltage versus Temperature 12 250 10 IL = 300 mA 8 200 Ignd (mA) DROPOUT VOLTAGE (mV) 300 IL = 250 mA 150 IL = 100 mA 100 IL = 300 mA 6 4 IL = 100 mA 50 2 IL = 10 mA 0 –40 0 IL = 50 mA 25 0 85 0 1 2 3 TEMPERATURE (°C) Figure 9. Ground Pin Current versus Ambient Temperature 2.5 8 7 4 5 6 7 8 Vin (VOLTS) Figure 10. Output Voltage versus Ambient Temperature (Vin = Vout1 +1V) IO = 0 2.495 IL = 250 mA Vout (VOLTS) Ignd (mA) 6 5 4 3 2.49 IO = 250 mA 2.485 IL = 100 mA 2.48 IL = 50 mA 2.475 2 1 0 –40 –20 0 20 40 60 80 100 120 2.47 –40 140 0 25 TEMPERATURE (°C) TA (°C) http://onsemi.com 5 85 MC33275 Figure 11. Output Voltage versus Ambient Temperature (Vin = 12 V) 2.5 IO = 0 2.495 Vout (VOLTS) 2.49 IO = 250 mA 2.485 2.48 2.475 2.47 2.465 –40 0 25 85 TEMPERATURE (°C) Figure 12. Ripple Rejection Figure 13. Ripple Rejection 70 70 60 60 IL = 100 mA IL = 10 mA 50 50 IL = 250 mA dB dB IL = 1 mA 40 40 30 30 20 20 10 10 0 0.1 1 10 0 0.1 100 1 10 FREQUENCY (kHz) FREQUENCY (kHz) http://onsemi.com 6 100 MC33275 APPLICATIONS INFORMATION Figure 14. Typical Application Circuit Vout Vin MC33275–XX Cin Cout LOAD GND Figure 15. ESR for Vout = 3.0V The MC33275 regulators are designed with internal current limiting and thermal shutdown making them user–friendly. Figure 14 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. 100 ESR (ohm) Vout = 3.0 V Cout = 1.0 mF Cin = 1.0 mF 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 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 type of aluminum, tantalum, or multilayer ceramic will perform adequately. Solid tantalums or appropriate multilayer ceramic capacitors are recommended for operation below 25°C. 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 15 shows the ESR that allows the LDO to remain stable for various load currents. 10 Stable Region 1.0 0.1 0 50 100 150 200 250 300 LOAD CURRENT (mA) 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 150°C, 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 150°C 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 150°C, 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 MC33275. http://onsemi.com 7 MC33275 2.50 R θ JA, THERMAL RESISTANCE JUNCTION-TO-AIR (°C/W) 280 Free Air Mounted Vertically 240 PD(max) for TA = 50°C ÎÎÎÎ ÎÎÎÎ ÎÎÎÎ 200 Minimum Size Pad 160 1.25 2.0 oz. Copper L L 120 80 0.83 0.63 0.50 0.42 RθJA 0.35 40 0 5.0 10 15 20 25 PD, MAXIMUM POWER DISSIPATION (W) Figure 16. SOT–223 Thermal Resistance and Maximum Power Dissipation versus P.C.B. Copper Length 30 Figure 17. DPAK Thermal Resistance and Maximum Power Dissipation versus P.C.B. Copper Length 2.4 R θ JA, THERMAL RESISTANCE, JUNCTION-TO-AIR (°C/W) 100 Free Air Mounted Vertically 90 PD(max) for TA = 50°C 2.0 2.0 oz. Copper L ÎÎÎÎ ÎÎÎÎ ÎÎÎÎ 80 Minimum Size Pad 70 L 60 50 1.6 1.2 0.8 0.4 RθJA 0 40 0 5.0 10 15 20 25 30 L, LENGTH OF COPPER (mm) Figure 18. SOP–8 Thermal Resistance and Maximum Power Dissipation versus P.C.B. Copper Length 3.2 170 150 2.8 PD(max) for TA = 50°C 130 2.4 110 Graph Represents Symmetrical Layout 2.0 90 L 70 ÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎ 2.0 oz. Copper 3.0 mm L RθJA 50 1.6 1.2 0.8 0.4 30 0 10 20 30 L, LENGTH OF COPPER (mm) http://onsemi.com 8 40 50 PD, MAXIMUM POWER DISSIPATION (W) R θ JA, THERMAL RESISTANCE, JUNCTION-TO-AIR (°C/W) L, LENGTH OF COPPER (mm) MC33275 ORDERING INFORMATION Device Operating Temperature Range, Tolerance Type Case Package 369A DPAK 318E SOT–223 MC33275D–2.5R2 751–5 SOP–8 MC33275DT–3.0RK 369A DPAK 318E SOT–223 751–5 SOP–8 369A DPAK 318E SOT–223 MC33275D–3.3R2 751–5 SOP–8 MC33275DT–5.0RK 369A DPAK 318E SOT–223 751–5 SOP–8 MC33275DT–2.5RK MC33275ST–2.5T3 MC33275ST–3.0T3 2.5 2 5V (Fixed Voltage) 3.0 3 0V (Fixed Voltage) 1% Tolerance T l 25°C C at TA = 25 MC33275D–3.0R2 MC33275DT–3.3RK MC33275ST–3.3T3 MC33275ST–5.0T3 3.3 3 3V (Fixed Voltage) 2% Tolerance T l att 40 to +125°C +125 C TJ from –40 5.0 5 0V (Fixed ( Voltage) g ) MC33275D–5.0R2 DEVICE MARKING Device Version Marking (1st line) MC33275 2.5V 27525 MC33275 3.0V 27530 MC33275 3.3V 27533 MC33275 5.0V 27550 TAPE AND REEL SPECIFICATIONS Device Reel Size Tape Width Quantity MC33275DT 13” 16mm embossed tape 2500 units MC33275D 13” 12mm embossed tape 2500 units MC33275S 13” 8mm embossed tape 4000 units http://onsemi.com 9 MC33275 PACKAGE DIMENSIONS ST SUFFIX PLASTIC PACKAGE CASE 318E–04 (SOT–223) ISSUE J A F NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. 4 S B 1 2 3 D L G J C 0.08 (0003) M H 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 K D SUFFIX PLASTIC PACKAGE CASE 751–06 (SOP–8) ISSUE T D A 8 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. C 5 0.25 H E M B M 1 4 h B e X 45 _ q A C SEATING PLANE L 0.10 A1 B 0.25 M C B S A S DIM A A1 B C D E e H h L q http://onsemi.com 10 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_ MC33275 PACKAGE DIMENSIONS DT SUFFIX PLASTIC PACKAGE CASE 369A–13 (DPAK) ISSUE Z –T– C B V NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. SEATING PLANE E R 4 Z A S 1 2 3 U K F J L H D G 2 PL 0.13 (0.005) M T http://onsemi.com 11 DIM A B C D E F G H J K L R S U V Z INCHES MIN MAX 0.235 0.250 0.250 0.265 0.086 0.094 0.027 0.035 0.033 0.040 0.037 0.047 0.180 BSC 0.034 0.040 0.018 0.023 0.102 0.114 0.090 BSC 0.175 0.215 0.020 0.050 0.020 ––– 0.030 0.050 0.138 ––– MILLIMETERS MIN MAX 5.97 6.35 6.35 6.73 2.19 2.38 0.69 0.88 0.84 1.01 0.94 1.19 4.58 BSC 0.87 1.01 0.46 0.58 2.60 2.89 2.29 BSC 4.45 5.46 0.51 1.27 0.51 ––– 0.77 1.27 3.51 ––– MC33275 ON Semiconductor and are trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. 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