Order this document by MC33267/D The MC33267 is a positive fixed 5.0 V regulator that is specifically designed to maintain proper voltage regulation with an extremely low input–to–output voltage differential. This device is capable of supplying output currents in excess of 500 mA and contains internal current limiting and thermal shutdown protection. Also featured is an on–chip power–up reset circuit that is ideally suited for use in microprocessor based systems. Whenever the regulator output voltage is below nominal, the reset output is held low. A programmable time delay is initiated after the regulator has reached its nominal level and upon timeout, the reset output is released. Due to the low dropout voltage specifications, the MC33267 is ideally suited for use in battery powered industrial and consumer equipment where an extension of useful battery life is desirable. This device is contained in an economical five lead TO–220 type package. • Low Input–to–Output Voltage Differential • • • • Output Current in Excess of 500 mA LOW DROPOUT REGULATOR with POWER–UP RESET SEMICONDUCTOR TECHNICAL DATA Pin 1. VCC Input 2. Reset 3. Ground 4. Delay 5. Output On–Chip Power–Up Reset Circuit with Programmable Delay Internal Current Limiting with Thermal Shutdown Economical Five Lead TO–220 Type Packages 1 5 ORDERING INFORMATION Tested Operating Temperature Range Device MC33267T Package Plastic Power TJ = –40 ° to +125°C MC33267TV Plastic Power TJ = –40 ° to +105°C MC33267D2T T SUFFIX PLASTIC PACKAGE CASE 314D Surface Mount 1 5 TV SUFFIX PLASTIC PACKAGE CASE 314B Representative Block Diagram Heatsink surface connected to Pin 3. Input Output 1 5 3.01 R Reference 1.25 V 20 µA Reset Delay 200 + 1.25 V Ground 5 3.8 V Delay Overcurrent Detector 1 + R Thermal Reset 2 0.03 R 3 4 D2T SUFFIX PLASTIC PACKAGE CASE 936A (D2PAK) Heatsink surface (shown as terminal 6 in case outline drawing) is connected to Pin 3. This device contains 37 active transistors. Motorola, Inc. 1996 MOTOROLA ANALOG IC DEVICE DATA Rev 1 1 MC33267 MAXIMUM RATINGS Symbol Value Unit Input Voltage Range Rating Vin – 20 to + 40 Vdc Delay Voltage Range VDLYR – 0.3 to VO V IDLY(sink) 25 mA VRR – 0.3 to +15 V IR(sink) 50 mA PD RθJA RθJC Internally Limited 62.5 4.0 W °C/W °C/W PD RθJA RθJC Internally Limited 70 5.0 W °C/W °C/W TJ –40 to +150 °C Tstg –55 to +150 °C Delay Sink Current Reset Voltage Range Reset Sink Current Power Dissipation Case 314B and 314D (TO–220 Type) TA = 25°C Thermal Resistance, Junction–to–Ambient Thermal Resistance, Junction–to–Case Case 936A (D2PAK) [Note 1] TA = 90°C Thermal Resistance, Junction–to–Ambient Thermal Resistance, Junction–to–Case Operating Junction Temperature Range Storage Temperature Range NOTE: 1. D2PAK Junction–to–Ambient Thermal Resistance is for vertical mounting. Refer to Figure 7 for board mounted thermal resistance. ELECTRICAL CHARACTERISTICS (Vin = 14.4 V, IO = 5.0 mA, CO = 100 µF, CO(ESR) ≤ 0.3 Ω, TJ = 25°C (Note 2), unless otherwise noted.) Characteristic Output Voltage (IO = 5.0 mA to 500 mA, Vin = 6.0 V to 28 V) TJ = 25°C TJ = – 40° to +125°C Symbol Min Typ Max 4.95 4.9 5.05 – 5.15 5.2 VO Unit V Line Regulation (Vin = 6.0 V to 26 V) Regline – 3.0 50 mV Load Regulation (IO = 5.0 mA to 500 mA) Regload – 1.0 50 mV – – – – 12 22 100 120 20 40 200 300 60 80 – Bias Current IO = 0 mA IO = 150 mA IO = 500 mA IO = 500 mA, Vin = 6.2 V IB Ripple Rejection (f = 120 Hz, Vin = 7.0 V to 17 V, IO = 350 mA, CO = 100 µF) RR mA dB Dropout Voltage (IO = 500 mA) Vin – VO – 0.58 0.8 V Delay Comparator Threshold (VO Decreasing) Vth(DLY) 4.8 VO – 0.15 VO – 0.08 V IDLY(source) 12 20 28 µA Vth(R) 3.6 3.8 4.0 V Reset Sink Saturation (Isink = 10 mA) VCE(sat) – 0.2 0.8 V Reset Off–State Leakage (VCE = 5.0 V) IR(leak) – 0.3 10 µA Delay Pin Source Current Reset Comparator Threshold NOTE: 2. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible. 2 MOTOROLA ANALOG IC DEVICE DATA MC33267 Figure 1. Typical Application Circuit Input Vin Cin + 0.1 Output 1 5 3.01 R CO + VO 100 20 µA Reference 1.25 V Reset Output Reset 2 0.03 R + 3.8 V R Delay Thermal Delay 200 Overcurrent Detector + 4 + CDLY 1.25 V Ground 3 = Sink Only Positive True Logic APPLICATION CIRCUIT INFORMATION The MC33267 is a low dropout, positive fixed 5.0 V, 500 mA regulator. Protection features include output current limiting and thermal shutdown. System protection consists of an on–chip power–up microprocessor reset circuit. A typical applications circuit is shown in Figure 1. The input bypass capacitor (Cin) is recommended if the regulator is located an appreciable distance (≥ 4″) from the supply input filter. This will reduce the circuit’s sensitivity to the input line impedance at high frequencies. These regulators are not internally compensated and thus require an external output capacitor (CO) for stability. The recommended capacitance is 100 µF with an equivalent series resistance (ESR) of less than 0.3 Ω. A minimum capacitance of 33 µF with a maximum ESR of 3.0 Ω can be used in applications where space is a premium, however, these limits must be observed over the entire operating temperature range of the regulator circuit. With economical electrolytic capacitors, cold temperature operation can pose a serious stability problem. As the electrolyte freezes, around – 30°C, the capacitance will MOTOROLA ANALOG IC DEVICE DATA decrease and the ESR will increase drastically, causing the circuit to oscillate. Quality electrolytic capacitors with extended temperature ranges of – 40°C to + 85°C and – 55°C to +105°C are readily available. It is suggested that oven testing of the entire circuit be performed with maximum load, minimum input voltage, and minimum ambient temperature. Figure 2 shows the reset circuit timing relationship. Note that whenever the regulator’s output is less than 4.9 V, the delay capacitor (CDLY) is immediately discharged, and the reset output is held in a low state. As the regulator’s output voltage increases beyond 4.97 V, the delay comparator will allow the 20 µA current source to charge CDLY. The reset output will go to a high state when CDLY crosses the 3.8 V threshold of the reset comparator. The reset delay time is controlled by the value selected for CDLY. The required system reset time is governed by the microprocessor and usually a reset signal which lasts several machine cycles is sufficient. 3 MC33267 Figure 2. Timing Waveforms Regulator Output (Pin 5) 5.05 V 4.97 V 4.90 V 150 mV 4.70 V 3.80 V Delay Capacitor (Pin 4) 0.48 V 5.05 V Reset Output (Pin 2) 0V tDLY tDLY Figure 3. Reset Output versus Input Voltage Figure 4. Output Voltage versus Input Voltage 6.0 RL = 10 k to VO TJ = 25°C 5.0 4.0 3.0 RL = 10 Ω 2.0 RL = ∞ 1.0 0 0 2.0 4.0 Vin, INPUT VOLTAGE (V) 4 TJ = 25°C 5.0 VO , OUTPUT VOLTAGE (V) VO , RESET OUTPUT VOLTAGE (V) 6.0 6.0 8.0 RL = ∞ 4.0 RL = 10 Ω 3.0 2.0 1.0 0 0 2.0 4.0 Vin, INPUT VOLTAGE (V) 6.0 8.0 MOTOROLA ANALOG IC DEVICE DATA MC33267 Figure 5. Reset Output versus Input Voltage Figure 6. Output Voltage versus Input Voltage 6.0 RL = 10 k to VO TJ = 25°C 5.0 4.0 3.0 RL = 10 Ω 2.0 RL = ∞ 1.0 0 0 2.0 TJ = 25°C 5.0 VO , OUTPUT VOLTAGE (V) VO , RESET OUTPUT VOLTAGE (V) 6.0 4.0 6.0 RL = ∞ 4.0 3.0 2.0 1.0 0 0 8.0 RL = 10 Ω 2.0 Vin, INPUT VOLTAGE (V) 4.0 Vin, INPUT VOLTAGE (V) 6.0 8.0 JUNCTION-TO-AIR (°C/W) R θ JA, THERMAL RESISTANCE 80 3.5 PD(max) for TA = 50°C 70 3.0 Free Air Mounted Vertically 60 ÎÎÎ ÎÎÎ ÎÎÎ ÎÎÎ 2.0 oz. Copper L Minimum Size Pad 50 L 40 RθJA 2.5 2.0 1.5 30 PD, MAXIMUM POWER DISSIPATION (W) Figure 7. D2PAK Thermal Resistance and Maximum Power Dissipation versus P.C.B. Copper Length 1.0 0 5.0 10 15 20 25 30 L, LENGTH OF COPPER (mm) MOTOROLA ANALOG IC DEVICE DATA 5 MC33267 OUTLINE DIMENSIONS T SUFFIX PLASTIC PACKAGE CASE 314D–03 (TO–220 TYPE) ISSUE D –T– SEATING PLANE NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. 3. DIMENSION D DOES NOT INCLUDE INTERCONNECT BAR (DAMBAR) PROTRUSION. DIMENSION D INCLUDING PROTRUSION SHALL NOT EXCEED 10.92 (0.043) MAXIMUM. C –Q– B E U A DIM A B C D E G H J K L Q U S L 1 2 3 4 5 K S J G D INCHES MIN MAX 0.572 0.613 0.390 0.415 0.170 0.180 0.025 0.038 0.048 0.055 0.067 BSC 0.087 0.112 0.015 0.025 1.020 1.065 0.320 0.365 0.140 0.153 0.105 0.117 0.543 0.582 MILLIMETERS MIN MAX 14.529 15.570 9.906 10.541 4.318 4.572 0.635 0.965 1.219 1.397 1.702 BSC 2.210 2.845 0.381 0.635 25.908 27.051 8.128 9.271 3.556 3.886 2.667 2.972 13.792 14.783 H 5 PL 0.356 (0.014) M T Q M TV SUFFIX PLASTIC PACKAGE CASE 314B–05 (TO–220 TYPE) ISSUE J Q OPTIONAL CHAMFER E A U K NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. 3. DIMENSION D DOES NOT INCLUDE INTERCONNECT BAR (DAMBAR) PROTRUSION. DIMENSION D INCLUDING PROTRUSION SHALL NOT EXCEED 0.043 (1.092) MAXIMUM. C B –P– S L W 5X G 5X D 0.10 (0.254) M T P M 0.24 (0.610) M J T H N –T– 6 V F SEATING PLANE DIM A B C D E F G H J K L N Q S U V W INCHES MIN MAX 0.572 0.613 0.390 0.415 0.170 0.180 0.025 0.038 0.048 0.055 0.850 0.935 0.067 BSC 0.166 BSC 0.015 0.025 0.900 1.100 0.320 0.365 0.320 BSC 0.140 0.153 ––– 0.620 0.468 0.505 ––– 0.735 0.090 0.110 MILLIMETERS MIN MAX 14.529 15.570 9.906 10.541 4.318 4.572 0.635 0.965 1.219 1.397 21.590 23.749 1.702 BSC 4.216 BSC 0.381 0.635 22.860 27.940 8.128 9.271 8.128 BSC 3.556 3.886 ––– 15.748 11.888 12.827 ––– 18.669 2.286 2.794 MOTOROLA ANALOG IC DEVICE DATA MC33267 OUTLINE DIMENSIONS D2T SUFFIX PLASTIC PACKAGE CASE 936A–02 (D2PAK) ISSUE A –T– OPTIONAL CHAMFER A TERMINAL 6 E U S K B V H NOTES: 1 DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2 CONTROLLING DIMENSION: INCH. 3 TAB CONTOUR OPTIONAL WITHIN DIMENSIONS A AND K. 4 DIMENSIONS U AND V ESTABLISH A MINIMUM MOUNTING SURFACE FOR TERMINAL 6. 5 DIMENSIONS A AND B DO NOT INCLUDE MOLD FLASH OR GATE PROTRUSIONS. MOLD FLASH AND GATE PROTRUSIONS NOT TO EXCEED 0.025 (0.635) MAXIMUM. 1 2 3 4 5 M D 0.010 (0.254) M T N G C MOTOROLA ANALOG IC DEVICE DATA R L P DIM A B C D E G H K L M N P R S U V INCHES MIN MAX 0.386 0.403 0.356 0.368 0.170 0.180 0.026 0.036 0.045 0.055 0.067 BSC 0.539 0.579 0.050 REF 0.000 0.010 0.088 0.102 0.018 0.026 0.058 0.078 5 _ REF 0.116 REF 0.200 MIN 0.250 MIN MILLIMETERS MIN MAX 9.804 10.236 9.042 9.347 4.318 4.572 0.660 0.914 1.143 1.397 1.702 BSC 13.691 14.707 1.270 REF 0.000 0.254 2.235 2.591 0.457 0.660 1.473 1.981 5 _ REF 2.946 REF 5.080 MIN 6.350 MIN 7 MC33267 Motorola reserves the right to make changes without further notice to any products herein. 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