K78XXT-500 Series WIDE INPUT, NON-ISOLATED & REGULATED SMD PACKAGE SINGLE OUTPUT RoHS FEATURES ● Efficiency up to 96% ● No need for heat sinks ● 0.5AMP SMD package ● Wide input voltage range(4.5V~28V) ● Adjustable output voltage ● Remote ON/OFF control ●Short circuit protection, Thermal shutdown ● Very low shutdown current ● Super low ripple and noise PRODUCT PROGRAM Input Voltage (VDC) Output Voltage (VDC) Part Number Current (mA) Efficiency (%)(Typ.) Nominal Range Normal Adjust Range K7803T-500 12 4.5-28 3.3 1.8-5.5 500 90 75 K7805T-500 12 6.0-28 5.0 2.5-8.0 500 94 81 K7809T-500 24 11-28 9.0 3.0-11.5 500 95 87 K7812T-500 24 14-28 12 4.5-13.5 500 95 90 K7815T-500 24 17-28 15 4.5-15.5 500 96 92 Vin (min.) Vin (max.) 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. K7812T-500, K7815T-500 is not allowed to operate under no load. APPLICATIONS The K78xxT-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 SPECIFICATIONS Characteristics Conditions Min. Typ. Input voltage range See selection guide 4.5 12/24 Super low ripple and noise of typically only Output voltage adjust range See selection guide 1.8 10mV and a shutdown input current of typically Output voltage accuracy Input voltage range at full load ±2 ±3 only 15uA. Line regulation Input voltage range at full load ±0.2 ±0.5 Load regulation Nominal Input ,10% to 100% load ±0.3 ±0.75 Ripple and Noise 20MHz bandwidth 10 25 mVp-p ±75 mV +85°C. The additional features include remote ON/OFF control and adjustable output voltage. MODEL SELECTION Short circuit protection mode K7805T-500 Short circuit protection 250 Output current limit Dynamic load stability 100%<->10% load ±30 Output Voltage Quiescent current Normal input (3.3V, 5V output) 15 Product Series Thermal shutdown Internal IC junction 160 Temperature coefficient -40°C to +85°C ambient 220 C Temperature ( C) 200 60 Sec Max (> 220 C) 150 100 Ti me (sec.) ON/OFF shutdown threshold voltage 1.1 Operating temperature range -40 Lead temperature Storage humidity range MORNSUN Science & Technology Co.,Ltd. Case material Address: No. 5, Kehui St. 1, Kehui development MTBF center, Science Ave., Guangzhou Science City, Luogang district, Guangzhou,P.R.China. Tel: 86-20-28203030 Fax:86-20-28203068 A mA °C %/°C μF μA 2 Shutdown input current Remark: The curve applies only to the hot air reflow soldering % 1000 ON: open or 1.5<Vc≤6V OFF:GND or 0V<Vc<1V 15 30 μA 1.25 1.4 V +85 +100 Storage temperature range 0 V ±0.02 Operating case temperature 50 V 1.8 Max capacitance load ON/OFF control current 28 15.5 Continuous, automatic recovery Package Style Peak. Tem p 240 C 10 Sec Max Units Hiccup mode Output Current RECOMMENDED REFLOW SOLDERING PROFILE Max. -55 o C +125 1.5mm from case for 10 seconds 300 95 Cooling % Free Air Convection Plastic (UL94-V0) (MIL-HDBK-217F,+25°C) Package weight 2000 K hours 2.3 Http://www.mornsun-power.com The copyright and authority for the interpretation of the products are reserved by MORNSUN Specifications subject to change without notice. K78XXT-500 A/4-2011 Page 1 of 5 g TYPICAL TEMPERATURE CURVE EXTERNAL CAPACITOR TABLE Temperature Derating Graph Part Number C1 (ceramic capacitor) C2 (ceramic capacitor) K7803T-500 10uF/50V 22uF/16V K7805T-500 10uF/50V 22uF/16V K7809T-500 10uF/50V 22uF/16V K7812T-500 10uF/50V 10uF/25V K7815T-500 10uF/50V 10uF/25V Operating Temp.( C ) STANDARD APPLICATION CIRCUIT Vin 1 C1 10 Vout 5 K7805T-500 6 7 ,9 R1 C2 C3 1 0 0μ F ON /O F F C5 1. 2. 3. R2 470p F GND GND C1,C2: Choose a ceramic type capacitors; C3 is require ,for best performance , use a 100μF or more capacitor please. C1,C2 are require and should be placed close to the pins of the converter, with shortest possible traces. No parallel connection or plug and play. ADJUSTMENT RESISTOR VALUES Model K7803T-500 K7805T-500 K7809T-500 K7812T-500 K7815T-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 3.3V R1(kΩ) R2(kΩ) R1(kΩ) R2(kΩ) R1(kΩ) R2(kΩ) R1(kΩ) 67.3 5.79 3.6V 129.1 95.8 8.47 3.9V 59.1 140.9 11.8 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 10.0V 9.0V 18.84 180.6 76.3 11.0V 4.47 370 111 11.5V 1.61 635 134.1 12.0V R2(kΩ) 167.7 13.0V 40.6 13.5V 15 277.8 385 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. The copyright and authority for the interpretation of the products are reserved by MORNSUN Specifications subject to change without notice. K78XXT-500 A/4-2011 Page 2 of 5 TEST CONFIGURATIONS (TA=25°C) 1 Efficiency and Output Voltage Ripple Test 2 5 .4 m m 2 5 .4 m m 1 2 .7 m m 7 9 C1 GND Copper str ip 1μ F 6 C5 +Vout 5 C2 C3 1 0μ F C e r a m ic Ta n ta lu m Scope 470pF L oa d DC/DC Converter 1 2 .5 4m m Vin Ceramic Copper strip 2 Start-up and Load Transient Response Test 50.8 mm D C /DC C onverter 7 9 C1 5 6 C5 GND +Vout Copper strip Scope C2 C3 470pF Ceramic Load 1 2.54 mm Vin Copper strip APPLICATION EXAMPLE 1. To reduce output ripple, it is recommended to add a LC filter to output port. L: Recommended parameter 10μH ~ 47μH. 1 C1 GND DC/DC Converter 7,9 6 C5 5 +Vout 470pF 100 μF L 22μ F L oa d Vin 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. ON/OFF 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. The copyright and authority for the interpretation of the products are reserved by MORNSUN Specifications subject to change without notice. K78XXT-500 A/4-2011 Page 3 of 5 DC/DC C onv erter 1 51 KΩ C1 10 7,9 5 +Vout 6 470pF 5 KΩ 100μ F L oad Vin GND 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. DC /D C Converter 5 1 10 C1 7,9 +Vout 6 C5 470pF 100μ F Loa d Vin 100nF GND CH1: Von/off CH2: Vo Delay time: 64mS DC/ DC 1 Converter 5 10 C1 7, 9 +Vo ut 6 C5 47 0p F 10 0μ F Load Vin 20 0n F GND CH1: Von/off CH2: Vo Delay time: 136mS CHARACTERISTIC CURVE (TA=25°C) Efficiency and Output Voltage Ripple Ripple (mV) 45 Efficiency (%) 100 40 90 35 80 70 K7803T-500 K7805T-500 K7809T-500 K7812T-500 K7815T-500 60 50 40 25 20 30 15 20 10 10 K7803T-500 K7805T-500 K7809T-500 K7812T-500 K7815T-500 30 5 50 0 55 0 36 0 40 0 44 0 48 0 24 0 28 0 32 0 80 12 0 16 0 20 0 50 20 0 Efficiency VS Load (Vin=rating) Efficiency VS Output Load (Vin=Norm) Load (mA) 0 20 50 80 120 160 200 240 280 320 360 400 440 480 500 550 Load (mA) Ripple VS Load (Vin=Normal) Output Voltage Ripple VS Output Load (Vin=Norm) The copyright and authority for the interpretation of the products are reserved by MORNSUN Specifications subject to change without notice. K78XXT-500 A/4-2011 Page 4 of 5 Ripple (mV) Efficiency (%) 45 100 95 40 90 35 85 K7803T-500 K7805T-500 K7809T-500 K7812T-500 K7815T-500 80 75 70 65 K7803T-500 K7805T-500 K7809T-500 K7812T-500 K7815T-500 30 25 20 15 60 55 10 50 5 45 0 40 4.5 6 8 10 12 14 16 17 20 22 24 26 28 Vin(V) 4.5 Efficiency VS Vin (Full Load) 6 8 10 12 14 16 17 20 22 24 26 28 Vin (V) Ripple VS Vin ( Full Load) Efficiency VS Input Voltage (Full Load) Output Voltage Ripple VS Input Voltage (Full Load) PACKAGE STYLE AND PINNING MECHANICAL DIMENSIONS RECOMMENDED FOOTPRINT K78XXT-500 Series 10.16 [0.400] 7.00[0.276] 10 9 5.08[0.200] 7 6 7.25[0.285] 1 7 6 5 10.16 [0.400] 15.24 [0.600] 1.80[0.071] 5 1.00[0.039] 15.24 [0.600] Note: grid:2.54*2.54 mm. 0.25 [0.010] TUBE OUTLINE DIMENSIONS 14.80 [0.583] 9.70 [0.382] A 1.13[0.044] 5° N ote : U nit:m m [in ch ] P in tole r an ce s:± 0 .1 0 m m [± 0 .0 0 4in ch ] Ge n e ra l to le ra n ce s:± 0.2 5 m m[± 0 .0 10 in ch ] Pin Function 1 7,9 Vin GND 5 6 Vout Vadj 10 ON/OFF 6.40[0.252] Note: Unit :mm[inch] General tolerances: ±0.50mm[ ±0.020inch] FOOTPRINT DETAILS 8.60[0.339] A 10.20 [0.402] 1 8.50[0.335] 10 9 8.50 [0.335] 12.10 [0.477] 2.54[0.100] 4.60[0.181] L=530mm[20.866inch] Tube Quantity: 33pcs L=220mm[8.661inch] Tube Quantity: 13pcs Short tube inner packaging dimensions: L*W*H=255*170*80mm Short tube outer packaging dimensions(with six inner packaging boxes): L*W*H=375*280*270mm Long tube inner packaging dimensions: L*W*H=580*200*100mm Long tube outer packaging dimensions(with two inner packaging boxes): L*W*H=600*215*220mm Long tube outer packaging dimensions(with three inner packaging boxes): L*W*H=600*215*325mm TAPING REEL DIMENSIONS Taping dimensions: 12.40 [0.488] 29.40[1.157] Φ100.00 [Φ3.937] Φ330.00 [Φ12.992] 0.50[0.020] 24.00 [0.945] 2.00 [0.079] 15.65 [0.616] Φ1.50[Φ0.059] Taping reel dim ensions : 1.75[0.069] 11.50[0.453] 16.00 [0.630] 7.65[0.301] Φ1.50[Φ0.059] Φ13.00[Φ0.512] Φ21.50[Φ0.846] N ote: U nit :mm[inch] General tolerances: ± 0.50mm[±0.020inch] D evices per reel quantity:500pcs Inner packaging dimensions: L*W*H =365*350*150mm Outer packaging dimensions: L*W*H=390*360*245mm Note: 1. All specifications measured at Ta=25°C, humidity<75%, nominal input voltage and rated output load unless otherwise specified. 2. In this datasheet, all the test methods of indications are based on corporate standards. The copyright and authority for the interpretation of the products are reserved by MORNSUN Specifications subject to change without notice. K78XXT-500 A/4-2011 Page 5 of 5