® M78A Switching Regulator 0.5A, SIP Package FEATURES ►Industrial Standard SIP-3 Package ►Pin-out compatible with LM78xx Linear Regulator ►Fully Regulated Output Voltage ►Low Ripple & Noise ►Excellent Efficiency up to 97% ►Operating Ambient Temp. Range -40°C to +90°C ►No Min. Load Requirement ►Over Temp. and Short Circuit Protection PRODUCT OVERVIEW The MINMAX M78A series is a new range of switching regulators designed as a drop-in replacement for old LM78xx linear regulators with low efficiency.The very high efficiency of these step-down converters allow an operating temperature up to 80°C at full-load without need of any heatsink. The regulators come in a package which fits in the standard TO-220 footprint of linear regulators. The high efficiency and low stand-by power consumption of these switching regulators offer the designer a new, cost-efficient solution for many applications. Model Selection Guide Model Number Input Voltage Range(6) Output Voltage Output Current VDC VDC 1.5 1.8 2.5 3.3 5 6.5 9 12 15 mA 500 500 500 500 500 500 500 500 500 M78AR015-0.5 M78AR018-0.5 M78AR025-0.5 M78AR033-0.5 M78AR05-0.5 M78AR065-0.5 M78AR09-0.5 M78AR12-0.5 M78AR15-0.5 4.75 ~ 32 6.5 ~ 32 8 ~ 32 11 ~ 32 15 ~ 32 18 ~ 32 Max. Max. capacitive Load μF 220 220 220 220 220 220 220 220 220 Efficiency (typ.) Efficiency (typ.) @Min. Vin @Max. Vin % 73 82 87 91 94 95 96 97 97 % 63 71 77 81 86 88 92 94 95 Input Specifications Parameter Input Surge Voltage (1 sec. max.) Internal Filter Type Conditions Input Filter Short Circuit Input Power Input Current All Models Min. -0.3 Typ. --- Max. 34 Unit VDC Capacitor @No Load ----- Internal Capacitor --1.5 5 --- W mA Output Specifications Parameter Output Voltage Setting Accuracy Line Regulation Conditions 1.5V to 6.5V 9V to 15V 1.5V to 6.5V Io=10% to 100% 9V to 15V No minimum Load Requirement 1.5V to 6.5V --0-20MHz Bandwidth 9V to 15V ----50% Load Step Change ----Continuous, Automatic Recovery Vin=Min. to Max. @Full Load Load Regulation Minimum Load Ripple & Noise Transient Recovery Time Transient Response Deviation Temperature Coefficient Short Circuit Protection E-mail:[email protected] 2015/07/31 REV:7 Min. ----------- Tel:886-6-2923150 Page 1 of 4 Typ. ±2.0 ±0.2 ±0.1 ±0.4 ±0.25 Max. ±3.0 ±0.4 ±0.2 ±0.6 ±0.4 Unit %Vnom. % % % % ----100 ±2 --- 30 40 ----±0.015 mV P-P mV P-P μsec % %/℃ ® M78A Switching Regulator 0.5A, SIP Package General Specifications Parameter Conditions Min. I/O Isolation Voltage Typ. Max. 330 380 Unit None Switching Frequency 280 MTBF(calculated) MIL-HDBK-217F@25℃, Ground Benign KHz 2,000,000 Hours Environmental Specifications Parameter Conditions Min. Typ. Max. Unit Natural Convection -40 --- +90 ℃ Case Temperature --- --- +100 ℃ Storage Temperature -55 --- +125 ℃ --- 160 --- ℃ --- --- 95 % rel. H --- 260 ℃ Operating Ambient Temperature Range (See Power Derating Curve) Thermal Shutdown Internal IC junction Humidity (non condensing) Cooling Natural Convection Lead-free reflow solder process (1.5mm from case for 10Sec.) --- EMC Specifications Parameter Standards & Level Performance Radiation without adding any external components EMI EN55022, FCC part 15 Conduction with external components ESD Radiated immunity Fast transient(4) Conducted immunity PFMF EMS Class B A A A A A EN61000-4-2 Air±8kV EN61000-4-3 3V/m EN61000-4-4 ±0.5kV EN61000-4-6 3Vrms EN61000-4-8 3A/m EMI Filter meets Conducted EMI EN55022 class B; FCC part 15 level A L1 +Vout +Vin M78A Module C1 C2 C3 Load GND Class C1 C2 C3 Class A --- 4.7μF/50V 1206 MLCC 4.7μF/50V 1206 MLCC Class B 4.7μF/50V 1206 MLCC 4.7μF/50V 1206 MLCC 4.7μF/50V 1206 MLCC E-mail:[email protected] 2015/07/31 REV:7 Tel:886-6-2923150 Page 2 of 4 L1 Wurth Elektronik NO. 744774033 Wurth Elektronik NO. 74477410 ® M78A Switching Regulator 0.5A, SIP Package Power Derating Curve 100 Output Power (%) 80 Natural Convection 20LFM 60 40 20 0 ~ -40 0 20 40 60 80 100 110 Ambient Temperature C Notes 1 2 3 4 5 6 7 Specifications typical at Ta=+25℃, resistive load, nominal input voltage, rated output current unless otherwise noted. Other input and output voltage may be available, please contact factory. We recommend to protect the converter by a slow blow fuse in the input supply line. The M78A series can meet EN61000-4-4 by adding a capacitor across the input pins. Suggested capacitor CHEMI-CON KY 330μF/100V. That “natural convection” is about 20LFM but is not equal to still air (0 LFM). With a input capacitor 22μF/50V for input voltage >28VDC, the input voltage allows 32VDC, max. Specifications are subject to change without notice. Package Specifications Mechanical Dimensions Pin Connections 0.5 [0.02] Pin Function 1 +Vin 2 GND 3 +Vout 3.2 [0.13] 0.25 [0.01] 2x2.54 [2x0.10] 0.70 [0.03] 1 2 3 Bottom View 7.55 [0.30] 0.5 [0.02] 2.0 [0.08] 4.1 [0.16] 10.2 [0.40] 11.5 [0.45] 10.5 [0.41] ►All dimensions in mm ►Tolerance: X.X±0.5 Case Size : 11.5x7.55x10.2mm (0.45x0.30x0.40 inches) Case Material : Non-Conductive Black Plastic (flammability to UL 94V-0 rated) Pin Material : Alloy 42 Weight : 1.95g E-mail:[email protected] 2015/07/31 REV:7 Tel:886-6-2923150 Page 3 of 4 (X.XX±0.02) X.XX±0.25 ( X.XXX±0.01) ►Pins ±0.05(±0.002) Physical Characteristics (inches) ® M78A Switching Regulator 0.5A, SIP Package Test Setup Peak-to-Peak Output Noise Measurement Test Use a Cout 0.47μF ceramic capacitor. Scope measurement should be made by using a BNC socket, measurement bandwidth is 0-20 MHz. Position the load between 50 mm and 75 mm from the DC/DC Converter. +Vin + +Out Copper Strip Switching Regulator DC Power Source Cout GND - Scope Resistive Load Copper Strip Technical Notes Output Ripple Reduction A good quality low ESR capacitor placed as close as practicable across the load will give the best ripple and noise performance. To reduce output ripple, it is recommended to use 3.3μF capacitors at the output. + + Out +Vin Switching Regulator DC Power Source Cout Load GND - Maximum Capacitive Load The M78A series has limitation of maximum connected capacitance on the output. The power module may operate in current limiting mode during start-up, affecting the ramp-up and the startup time. The maximum capacitance can be found in the data sheet. 18, Sin Sin Road, An-Ping Industrial District, Tainan 702, Taiwan Tel: 886-6-2923150 Fax: 886-6-2923149 E-mail: [email protected] Minmax Technology Co., Ltd. 2015/07/31 REV:7 Page 4 of 4