WRN78XXT-500 Series WIDE INPUT, NON-ISOLATED & REGULATED SMD PACKAGE SINGLE OUTPUT PRODUCT PROGRAM Input Voltage(VDC) Output Voltage (VDC) Part Number Efficiency(%,Typ) Current Adjust (mA) Vin Vin (min.) (max.) Nominal Range Normal WRN7803T-500 12 4.5-28 3.3 1.8-5.5 500 90 75 WRN7805T-500 12 6.0-28 5.0 2.5-8.0 500 94 81 Efficiency up to 96% WRN7809T-500 24 11-28 9.0 3.0-11.5 500 95 87 No need for heat sinks WRN7812T-500 24 14-28 12 4.5-13.5 500 95 90 0.5AMP SMD package WRN7815T-500 24 17-28 15 4.5-15.5 500 96 92 FEATURES ◆ ◆ ◆ Wide input voltage range(4.5V~28V) ◆ Adjustable output voltage ◆ Range Note: 1. Answer for Vin-Vo>2V if needed to adjust the output voltage; 2. If input voltage above specified may cause permanent damage to the device. 3. WRN7812T-500, WRN7815T-500 is not allowed to operate under no load. Remote ON/OFF control ◆ Short circuit protection,Thermal shutdown ◆ Very low shutdown current ◆ Super low ripple and noise ◆ MODEL SELECTION SPECIFICATIONS ① ② ③ ④ WR WRN78 N78 05 T -500 ①Product Series ②Output Voltage ③SMD Package Style ④Output Current APPLICATIONS The WRN78xxT-500 series with high efficiency switching regulators are ideally supply for space constrained mobile applications.They are no need for any heat sinks, even if operate at +85℃. The additional features include remote ON/OFF control and adjustable output voltage.Super low ripple and noise of typically only 10mV and a shutdown input current of typically only 15uA . Characteristics Conditions Min. Typ. Input voltage range See selection guide 4.5 12/24 Output voltage adjust range See selection guide 1.8 Output voltage accuracy Input voltage range at full load ±2 Line regulation Input voltage range at full load Load regulation Nominal Input ,10% to 100% load Ripple and Noise 20MHz bandwidth Short circuit protection mode Hiccup mode Short circuit protection Continuous, automatic recovery Output current limit Units 28 V 15.5 V ±3 % ±0.2 ±0.5 % ±0.3 ±0.75 % 10 25 mVp-p ±75 mV 1.8 Dynamic load stability 100%<->10% load ±30 Quiescent current Normal input (3.3V, 5V output) 15 Thermal shutdown Internal IC junction 160 Temperature coefficient -40℃ to +85℃ ambient Max capacitance load ON/OFF control current Max. ON: open or 1.5<Vc≤6V A mA ℃ ±0.02 %/℃ 1000 µF 2 µA OFF:GND or 0V<Vc<1V Shutdown input current MICRODC RESERVES THE COPYRIGHT ON/OFF shutdown threshold voltage 1.1 Operating temperature range -40 15 30 1.25 1.4 V ±85 ℃ ±100 ℃ ±125 ℃ 300 ℃ 95 % Operating case temperature Storage temperature range Lead temperature -55 1.5mm from case for 10 seconds Storage humidity range Cooling Free Air Convection Case material MTBF Plastic (UL94-V0) (MIL-HDBK-217F,+25℃) 2000 Package weight http://www.microdc.cn µA Technical Enquiries-Email:[email protected] Tel:0086-20-86000646 K hours 2.3 g Page 1 of 6 WRN78XXT-500 Series TYPICAL TEMPERATURE CURVE EXTERNAL CAPACITOR TABL Part Number C1 (Ceramic capacitor) C2 (Ceramic capacitor) WRN7803T-500 10uF/50V 22uF/16V WRN7805T-500 10uF/50V 22uF/16V WRN7809T-500 10uF/50V 22uF/16V WRN7812T-500 10uF/50V 10uF/25V WRN7815T-500 10uF/50V 10uF/25V STANDARD APPLICATION CIRCUIT 1. C1,C2: Choose a ceramic type capacitors; C3 is require ,for best performance , use a 100uF or more capacitor please. 2. C1,C2 are require and should be placed close to the pins of the converter, with shortest possible traces. 3. No parallel connection or plug and play. ADJUSTMENT RESISTOR VALUES Model WRN7803T-500 WRN7805T-500 WRN7809T-500 WRN7812T-500 WRN7815T-500 Vo (nominal) 3.3V 5.0V 9V 12V 15V Adjusted range 1.8V-5.5V 2.5V-8V 3V-11.5V 4.5V-13.5V 4.5V-15.5V Regulated voltage R1(kΩ) 1.8V 24.31 R2(kΩ) 2.5V 98.9 25.28 3.0V 364 47.6 3.1 67.3 5.79 3.3V R1(kΩ) R2(kΩ) R1(kΩ) 3.6V 129.1 95.8 8.47 3.9V 59.1 140.9 11.8 R2(kΩ) R1(kΩ) R2(kΩ) R1(kΩ) 4.5V 24.3 411 19.14 4.55 2.69 4.9V 15.25 2060 25.77 8.05 5.55 5.0V 14.05 27.3 9.16 6.17 5.1V 12.8 208.5 29.22 10.41 6.98 5.5V 8.65 58.5 37.8 15 10 15.57 70.8 29.8 18.5 6.5V 7.2V 7.8 115.3 43.5 26.2 8.0V 3.15 243.1 64.8 36.7 105 52.9 76.3 9.0V 10.0V 18.84 180.6 11.0V 4.47 370 111 11.5V 1.61 635 134.1 12.0V R2(kΩ) 167.7 13.0V 40.6 277.8 13.5V 15 385 14.0V 586 14.5V 1128 15.0V 15.5V 88.2 Note: The above dates only are as reference, you could make corresponding adjustment with actual output when they are at practical application. http://www.microdc.cn Technical Enquiries-Email:[email protected] Tel:0086-20-86000646 Page 2 of 6 WRN78XXT-500 Series TEST CONFIGURATIONS (TA=25 (TA=25℃ ℃) 1 Efficiency and Output Voltage Ripple Test 2 Start-up and Load Transient Response Test APPLICATION EXAMPLE 1. To reduce output ripple, it is recommended to add a LC filter to output port. L: Recommended parameter 10µH ~ 47µH. http://www.microdc.cn Technical Enquiries-Email:[email protected] Tel:0086-20-86000646 Page 3 of 6 WRN78XXT-500 Series SHUTDOWN CONTROL The ON/OFF pin provides several features for adjusting and sequencing the power supply, a user has the flexibility of using the ON/OFF pin as: 1) A digital on/off control by pulling down the ON/OFF pin with an open-drain transistor. 2) Line UVLO. If desired to achieve a UVLO voltage, an resistor divider from Vin to ON/OFF to GND can be used to disable the converter until a higher input voltage is achieved. For example , it is not useful for a converter with 12V output to start up with a 12V input voltage, as the output cannot teach regulation. To enable the converter when the input voltage reaches 14V , a 51kΩ ⁄ 5kΩ resistor divider from Vin to GND can be connected to the ON⁄ OFF pin . Both the precision 1.25V threshold and 150mV hysteresis are multiplied by the resistor ratio , providing a proportional 12% hysteresis for any startup threshold. So , the turn off threshold would be between 12.3V to 15.7V. 3) Power supply sequencing. By connecting a small capacitor from ON/OFF to GND, the 2µA current source and 1.25V threshold can provide a stable and predictable delay between startup of multiple power supplies. For example, a startup delay of roughly 64mS is provided using 100nF, and roughly 136mS by using 200nF. http://www.microdc.cn Technical Enquiries-Email:[email protected] Tel:0086-20-86000646 Page 4 of 6 WRN78XXT-500 Series CHARACTERISTIC CURVE (TA=25 (TA=25℃ ℃) Efficiency and Output Voltage Ripple TAPING REEL DIMENSIONS Note: Unit :mm[inch] General tolerances: ±0.50mm[±0.020inch] Devices per reel quantity:500pcs Inner packaging dimensions: L*W*H=365*350*150mm Outer packaging dimensions: L*W*H=390*360*245mm http://www.microdc.cn Technical Enquiries-Email:[email protected] Tel:0086-20-86000646 Page 5 of 6 WRN78XXT-500 Series PACKAGE STYLE AND PINNING MECHANICAL DIMENSIONS RECOMMENDED FOOTPRINT TUBE OUTLINE DIMENSIONS RoHS COMPLIANT INFORMATION This series is compatible with RoHS soldering systems with a peak wave solder temperature of 300°C for 10 seconds. The pin termination finish on the SIP package type is Tin Plate, Hot Dipped over Matte Tin with Nickel Preplate. The DIP types are Matte Tin over Nickel Preplate. Both types in this series are backward compatible with Sn/Pb soldering systems. Microdc Professional Power Module,Inc. Tel:0086-20-86000646 E-mail:[email protected] Website:http://www.microdc.cn REACH COMPLIANT INFORMATION This series has proven that this product does not contain harmful chemicals, it also has harmful chemical substances through the registration, inspection and approval. http://www.microdc.cn Technical Enquiries-Email:[email protected] Tel:0086-20-86000646 Page 6 of 6