1000 mA DC-DC Step Down Converter P78BS-Series ● ● ● ● ● ● ● ● Non isolated 10 Pin SMD package Function compatible with 78xx linear regulator Efficiency up to 93 % Operating temperature range -40...+85 °C Continuous short circuit protected Thermal shut down Adjustable output voltage Model guide Type P78BS1R5 P78BS1R8 P78BS2R5 P78BS3R3 P78BS05 P78BS6R5 Input voltage Range Nominal [VDC] 4.75..15 4.75..15 5..18 5..18 7..18 8.5..18 [VDC] 12 12 12 12 12 12 Output Voltage [VDC] 1.5 1.8 2.5 3.3 5.0 6.5 Adjust trim range [VDC] fixed 1.5…3.6 1.5…3.9 1.8…5.5 2.5…8 fixed Current [mA] 1000 1000 1000 1000 1000 1000 Capacitive load max. [µF] 1000 1000 1000 1000 1000 1000 Efficiency @ Vin min. @ Vin max. [%] 76 79 83 84 90 93 [%] 74 77 81 84 88 91 Specifications Output Voltage accuracy Input voltage regulation Load regulation Dynamic load stability Temperature coefficient Ripple (at 20 MHz BW) Noise (at 20 MHz BW) Short circuit protection (hiccup mode) Thermal shutdown Output current limit Transient peak deviation Transient recovery time Input Filter Short circuit input power Quiescent current No load input power consumption ON control threshold OFF control threshold ON / OFF control current Shut down quiescent current ± 3 %, max. ± 0.5 %, max. ± 1 % @ load change 10..100 % ± 75 mV @ load 10..100 % ± 0.02 % / °C 35 mVp-p, max. 15 mVp-p, max. Continuous, automatic recovery 150 °C, typ. internal temp. 1.8 A, typ. ± 100 mV, max. @ load change 10..100 % 100 µs, max. @ load change 10..100 % Capacitive, 1 µF 1.8 W, max. 15 mA, typ. 54 mW, max. 1.2 V min., 6 V max. or open pin 10 < 0.6 V < 200 µA 200 µA, max. General Thermal shutdown Switching frequency Reliability calc. MTBF @ 25 °C MIL-HDBK-217F Environmental Operating ambient temperature Operating case temperature Storage temperature Derating Storage humidity Cooling Physical Dimensions Weight Case material Soldering temperature 160 °C, internal junction 1.4 MHz, typ. > 1 Mio. h -40 °C ... +85 °C 100 °C, max. -55 °C ... +125 °C see diagram Up to 95%, non condensing Free air convection SMD10, 15.24 x 8.5 x 7.25 mm 2.3 g Plastic UL94-V0 See soldering profile Page 1 of 6 Deutschland: Inselkammerstraße 10 D-82008 Unterhaching Tel.: 089 614 503-10 E-Mail: [email protected] Schweiz: Hochstrasse 355 CH-8200 Schaffhausen Tel.: 052 647 42 00 E-Mail: [email protected] 1000 mA DC-DC Step Down Converter P78BS-Series Standard application circuit 5 1 P78BS +Vin +Vout Rtd 7, 9 10 C1 10 µF Ceramic 6 Open ONstate Rtu 470 pF C2 100 µF GND GND 1. 2. 3. C1,C2 are require and should be placed close to the pins of the converter, with shortest possible traces. Do not connect the converter parallel or a hot swap Do not connect the converter parallel or a hot swap Adjustment resistor values Type Adj. range P78BS1R8 1.5…3.6 V Adj. Vout [V] Rtd [kΩ] Rtu [kΩ] 1.5 1.8 2.5 3.0 3.3 3.6 3.9 4.5 4.9 5.0 5.1 5.5 6.0 6.5 188 - 81.4 32.2 18.6 9.5 - P78BS2R5 1.5…3.9 V Rtd Rtu [kΩ] [kΩ] 15.4 68.6 88.7 41.3 20.1 8.0 - P78BS3R3 1.8…5.5 V Rtd Rtu [kΩ] [kΩ] 15.4 87 339 121 51 16.6 8 6.5 5.2 1.1 - P78BS5 2.5…6.5 V Rtd Rtu [kΩ] [kΩ] 9.7 30.5 48.8 75 115 338 1835 426 58.7 16.9 3.2 Note: The above dates only are as reference, you could make corresponding adjustment with actual output when they are at practical application. Application circuit to reduce output ripple. It is recommented to add a LC filter to output. 5 1 +Vin 10 C1 10 µF GND L 10…47µH P78BS 7,9 +Vout 6 470 pF C2 100µF C3 22 µF GND Page 2 of 6 Deutschland: Inselkammerstraße 10 D-82008 Unterhaching Tel.: 089 614 503-10 E-Mail: [email protected] Schweiz: Hochstrasse 355 CH-8200 Schaffhausen Tel.: 052 647 42 00 E-Mail: [email protected] 1000 mA DC-DC Step Down Converter P78BS-Series ON / OFF control function The ON/OFF pin 10 provides several features for adjusting and sequencing the power supply. An user has the flexibility of using the ON/OFF pin 10 as: 1) A digital on/off control by pulling down the ON/OFF pin with an open-drain transistor. 1 +Vin C1 On/Off Contr. +Vout C2 6 7, 9 10 5 P78BS ON/ OFF C3 470 pF GND GND EMC Specification EMI CE RE ESD EMS RS EFT Surge CS Voltage dips, short and interruptions immunity CISPR22 / EN55022 CISPR22 / EN55022 CISPR22 / EN55022 IEC / EN61000-4-2 IEC / EN61000-4-2 IEC / EN61000-4-3 IEC / EN61000-4-4 IEC / EN61000-4-5 IEC / EN61000-4-6 Contact ±6 kV Air ±8 kV 10 V/m ±2 kV ±2 kV 3 V rms Class A, Class B, Class A, perf. Criteria B perf. Criteria B perf. Criteria A perf. Criteria B, perf. Criteria B, perf. Criteria A IEC / EN61000-4-29 0…70 % perf. Criteria B without external circuit with external filter circuit 2 with external filter circuit 2 with ext. filter circuit 1 with ext. filter circuit 1 EMC Application circuit 82 µH 33 µH +Vin P78BS 1 TVS SMC36A MOV 10D560 120 µF + 4.7 µF 5 10 7, 9 6 Load 470 pF GND Circuit 1 Circuit 2 Test circuit for output ripple & noise, start up time and load tansient response 25.4 +Vin P78BS 1 10 7, 9 C1 12.7 Unit:mm 1µ +Vout 10 µ Cer. Cer. 5 6 C2 470 pF 12.7 C3 Oscilloscope measure points GND GND Page 3 of 6 Deutschland: Inselkammerstraße 10 D-82008 Unterhaching Tel.: 089 614 503-10 E-Mail: [email protected] Schweiz: Hochstrasse 355 CH-8200 Schaffhausen Tel.: 052 647 42 00 E-Mail: [email protected] 1000 mA DC-DC Step Down Converter P78BS-Series Page 4 of 6 Deutschland: Inselkammerstraße 10 D-82008 Unterhaching Tel.: 089 614 503-10 E-Mail: [email protected] Schweiz: Hochstrasse 355 CH-8200 Schaffhausen Tel.: 052 647 42 00 E-Mail: [email protected] 1000 mA DC-DC Step Down Converter P78BS-Series Page 5 of 6 Deutschland: Inselkammerstraße 10 D-82008 Unterhaching Tel.: 089 614 503-10 E-Mail: [email protected] Schweiz: Hochstrasse 355 CH-8200 Schaffhausen Tel.: 052 647 42 00 E-Mail: [email protected] 1000 mA DC-DC Step Down Converter P78BS-Series Dimensions Pin 1 5 6 7 9 10 Connections +V Input +V Output Trim input GND GND ON/OFF control PHI-CON is a trademark of HY-LINE Holding GmbH. Only for professional use by professionals! Not for resale or distribution to the general public in any way! Read the instructions for use carefully before using! Life Support Policy: HY-LINE does not authorize the use of any of its products for use in life support devices or systems without the express written approval of an officer of the Company. Life support systems are devices which support or sustain life, and whose failure to perform, when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in significant injury to the user. Rev: 2.16 f Page 6 of 6 Deutschland: Inselkammerstraße 10 D-82008 Unterhaching Tel.: 089 614 503-10 E-Mail: [email protected] Schweiz: Hochstrasse 355 CH-8200 Schaffhausen Tel.: 052 647 42 00 E-Mail: [email protected]