Data Sheet Non-Isolated Step-Down 3-Terminal DC/DC Converters BP5275-18 / BP5275-25 / BP5275-33 / BP5275-50 4.2 5.2 Dimensions (Unit : mm) 5.2 2xC0.5 2.6 13.8 MAX C0.5 23.0 MAX 20.3 4.0±1.0 Description The BP5275 series of DC/DC converters utilize a synchronous rectification system. A control circuit, switching element, and coil are built in, along with input/output capacitors, resulting in stable operation with no external components required. High conversion efficiency, combined with an original heat dissipation structure, enables configuration an ultra-compact switching power supplies. 500mA output is possible with no heat sink required (800mA with heat sink). In addition, the ICs are pin-compatible with conventional TO-220 LDO regulators, making replacement easy. Low ripple voltage with high precision output ensure stable operation against the fluctuating voltages from main power supplies, making them ideal for use as local power supplies (i.e. for microcontrollers). 0.75 1.3 2.54±0.2 2.54±0.2 0.5 Pin No.1 2 3 Note : Dimensions without tolerance is typical. Applications Power supplies for copiers, personal computers, facsimiles, AV equipment, measuring instruments, vending machines, security device, registers, industrial equipment, and maintenance tools Features 1) No external parts required 2) High power conversion efficiency. 3) Heat sink unnecessary. 4) Low output ripple voltage 5) High output voltage accuracy 6) Pin-compatible with conventional 3-pin LDOs 7) Compact package. BP5275-18 / BP5275-25 / BP5275-33 / BP5275-50 : SIP3 List of the series Input voltage Output voltage Maximum output current (no heat sink / include heat sink) Power conversion efficiency (Vin=12V) BP5275−18 BP5275−25 BP5275−33 BP5275−50 Unit 4.5 to 14 4.5 to 14 5.0 to 14 6.0 to 14 V 1.8 2.5 3.3 5.0 V 500 / 800 500 / 800 500 / 800 500 / 800 mA 73 78 83 88 % BP5275−18 BP5275−25 Absolute maximum ratings (Ta=25°C) Parameter Input voltage Operating temperature range Symbol Limits BP5275−33 BP5275−50 Unit VIn 15 15 15 15 V Topr −30 to 85 −30 to 85 −30 to 85 −30 to 85 °C Tstg −40 to 105 −40 to 105 −40 to 105 −40 to 105 °C Allowable maximum surface temperature Tcmax 100 100 100 100 °C Maximum output current 1 IO1max 500 500 500 500 °C Maximum output current 2 (with Heat Sink) IO2max 800 800 800 800 °C Storage temperature range www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. 1/7 2011.08 - Rev. A BP5275-18 / BP5275-25 / BP5275-33 / BP5275-50 Block diagram Data Sheet Measurement circuit 1 2 3 Control Circuit Io Vin A A V Vin V Vout V GND GND Electrical characteristics BP5275−18 (Unless otherwise noted : Ta=25°C, Vin=12V, lo1=500mA) Parameter Symbol Min. Typ. Max. Unit Vin 4 12 14 V DC Output voltage VO 1.75 1.80 1.85 V IO1=0mA Output current 1 IO1 0 500 mA Output current 2 IO2 800 mA With heat sink 5 50 mV Vin=4 to 14V IO=0 to 500mA Input voltage Line regulation Vr 0 Load regulation Vl 10 50 mV Output ripple voltage Vp 5 80 mVP-P Minimum start-up time Ts 4 7 msec Conversion efficiency 65 73 % Operation frequency f 1.5 MHz Max. Unit Conditions 1 Vin=0V 1 3V,Ro=3.6Ω 1 Derating required according to the input voltage and ambient temperature. BP5275-25 (Unless otherwise noted : Ta=25°C, Vin=12V, lo1=500mA) Parameter Symbol Min. Typ. Conditions Input voltage Vin 4 12 14 V DC Output voltage VO 2.45 2.50 2.55 V IO1=0mA Output current 1 IO1 0 500 mA Output current 2 IO2 800 mA With heat sink Line regulation Vr 0 5 50 mV Vin=4 to 14V Load regulation Vl 10 50 mV IO1=0 to 500mA Output ripple voltage Vp 5 50 mVP-P Minimum start-up time Ts 4 7 msec Conversion efficiency 73 78 % Operation frequency f 1.5 MHz 1 Vin=3V 1 4V,Ro=5Ω 1 Derating required according to the input voltage and ambient temperature. www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. 2/7 2011.08 - Rev. A BP5275-18 / BP5275-25 / BP5275-33 / BP5275-50 Data Sheet Electrical characteristics BP5275−33 (Unless otherwise noted :Ta=25°C, Vin=12V, lo1=500mA) Parameter Symbol Min. Typ. Max. Unit Conditions Input voltage Vin 4.5 12 14 V DC Output voltage VO 3.23 3.30 3.37 V IO1=0mA 0 500 mA 800 mA With heat sink mV Vin=4.5 to 14V IO=0 to 500mA Output current 1 IO1 Output current 2 IO2 Line regulation Vr 0 5 50 Load regulation Vl 10 50 mV Output ripple voltage Vp 5 50 mVP-P Minimum start-up time Ts 4 7 msec Conversion efficiency 78 83 % Operation frequency f 1.5 MHz Max. Unit 1 Vin=3V 1 4.5V,Ro=6.6Ω 1 Derating required according to the input voltage and ambient temperature. BP5275-50 (Unless otherwise noted : Ta=25°C, Vin=12V, lo1=500mA) Parameter Symbol Min. Typ. Conditions Input voltage Vin 6 12 14 V DC Output voltage VO 4.9 5.0 5.1 V IO1=0mA 0 500 mA 800 mA With heat sink Output current 1 IO1 1 Output current 2 IO2 Line regulation Vr 0 5 50 mV Vin=6 to 14V Load regulation Vl 10 50 mV IO1=0 to 500mA Output ripple voltage Vp 5 50 mVP-P Minimum start-up time Ts 4 7 msec Conversion efficiency 83 88 % Operation frequency f 1.5 MHz Vin=3V 1 6V,Ro=10Ω 1 Derating required according to the input voltage and ambient temperature. ●OPERATION NOTES ・This module will stop outputting because of protection circuit when the input voltage becomes maximum input voltage or less. Please note that the input voltage must not become maximum input voltage in any state of the load. ・After the circuit starts, the output voltage needs to become the fixed voltage within minimum activation time. If the output voltage is below the fixed voltage after the minimum activation time, it doesn’t work because of the protection circuit. Please evaluate sufficiently about activation characteristics of input voltage and load characteristics when starting. ・When the output circuit shorts, short-circuit protection of timer-latch type will work and stop outputting. To release the protection, it is necessary to turn on the switch again. This product also has protection element for safety. The protection element is fused if the current, with which the protection element will fuse, will be input by the time the short-circuit protection of timer-latch hangs. Please evaluate sufficiently at using environment about the action when the output circuit shorts. ・There are some case that the heat generates at the module by exceeding allowable maximum surface temperature when the load current which exceeds the maximum output current is electrified. Please make design keeping enough margins not to exceed allowable maximum surface temperature at any time under any application or any test conditions. ・The heat sink at back parts of the product is connected to GND. Please mind the arrangement not to contact with surrounding parts. www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. 3/7 2011.08 - Rev. A BP5275-18 / BP5275-25 / BP5275-33 / BP5275-50 Data Sheet ●BP5275-18 Output Voltage vs. Temperature Fluctuation（Vin=12V） 1.85 1.85 1.84 1.84 1.83 1.83 Output Voltage Vo [V] Output Voltage Vo [V] Line Regulation 1.82 1.81 1.80 1.79 1.78 1.82 1.81 1.80 1.79 1.78 Ta= 80°C 1.77 Ta= 25°C 1.76 Ta= 80°C 1.77 Ta= 25°C 1.76 Ta=−35°C Ta=−35°C 1.75 0 2 4 6 8 10 12 14 1.75 16 0 100 Intput Voltage Vin [V] 100 1.84 90 Power Conversion Efficiencyη[%] 1.85 Output Voltage Vo [V] 1.83 1.82 1.81 1.80 1.79 1.78 Vin= 6V Vin=12V 1.76 80 70 60 50 40 30 Vin= 6V 20 Vin=12V 10 Vin=14V Vin=14V 1.75 0 0 100 200 300 400 Output Current Io [ｍＡ] 500 0 100 Vin=10V以下 Vin=12V Vin=14V 600 500 76℃ Load Current Io2 [mA] 800 400 333mA 300 OPERATION R R RANGE Vin=12V以下 Vin=14V 1000 65℃ 75℃ 500 200 300 400 Output Current Io [ｍＡ] Derating Curve (With heat sink) Derating Curve (No heat sink) Load Current Io1 [mA] 500 Power Conversion Efficiency Fluctuation（Ta=25°C） Output Voltage vs. Input Voltage Fluctuation（Ta=25°C） 1.77 200 300 400 Output Current Io [ｍＡ] 250mA 200 100 600 550mA OPERATION RANGE 400 200 0 0 -40 -20 0 20 40 60 80 -40 100 0 20 40 60 80 100 Ambient Temperature Ta [°C] Ambient Temperature Ta [°C] www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. -20 4/7 2011.08 - Rev. A BP5275-18 / BP5275-25 / BP5275-33 / BP5275-50 Data Sheet ●BP5275-25 Output Voltage vs. Temperature Fluctuation（Vin=12V） 2.55 2.54 2.54 2.53 2.53 Output Voltage Vo [V] Output Voltage Vo [V] Line Regulation 2.55 2.52 2.51 2.50 2.49 2.48 2.52 2.51 2.50 2.49 2.48 Ta= 80°C 2.47 Ta=−35°C 0 2 4 6 8 10 12 14 Ta= 25°C 2.46 2.46 2.45 Ta= 80°C 2.47 Ta= 25°C Ta=−35°C 2.45 16 0 100 Intput Voltage Vin [V] Output Voltage vs. Input Voltage Fluctuation（Ta=25°C） 2.54 90 Power Conversion Efficiencyη[%] 100 Output Voltage Vo [V] 2.53 2.52 2.51 2.50 2.49 2.48 Vin= 6V Vin=12V 2.46 80 70 60 50 40 30 Vin= 6V 20 Vin=12V 10 Vin=14V Vin=14V 2.45 0 0 100 200 300 400 Output Current Io [ｍＡ] 0 500 100 400 500 74℃ Load Current Io2 [mA] 800 400 333mA 300 OPERATION R RANGE R Vin=12V以下 Vin=14V 1000 65℃ 75℃ 500 300 Derating Curve (With heat sink) Vin=10V以下 Vin=12V Vin=14V 600 200 Output Current Io [ｍＡ] Derating Curve (No heat sink) Load Current Io1 [mA] 500 Power Conversion Efficiency Fluctuation（Ta=25°C） 2.55 2.47 200 300 400 Output Current Io [ｍＡ] 250mA 200 100 600 528mA OPERATION RANGE 400 200 0 0 -40 -20 0 20 40 60 80 -40 100 www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. -20 0 20 40 60 80 100 Ambient Temperature Ta [℃] Ambient Temperature Ta [℃] 5/7 2011.08 - Rev. A BP5275-18 / BP5275-25 / BP5275-33 / BP5275-50 Data Sheet ●BP5275-33 Output Voltage vs. Temperature Fluctuation（Vin=12V） 3.40 3.40 3.38 3.38 3.36 3.36 Output Voltage Vo [V] Output Voltage Vo [V] Line Regulation 3.34 3.32 3.30 3.28 3.26 Ta= 80°C 3.24 3.34 3.32 3.30 3.28 3.26 Ta= 80°C 3.24 Ta= 25°C Ta= 25°C 3.22 3.22 Ta=−35°C Ta=−35°C 3.20 3.20 0 2 4 6 8 10 12 14 16 0 100 Intput Voltage Vin [V] Output Voltage vs. Input Voltage Fluctuation（Ta=25°C） 3.40 100 3.38 90 Power Conversion Efficiencyη[%] Output Voltage Vo [V] 300 400 500 Power Conversion Efficiency Fluctuation（Ta=25°C） 3.36 3.34 3.32 3.30 3.28 3.26 Vin= 6V 3.24 Vin=12V 3.22 Vin=14V 80 70 60 50 40 30 Vin= 6V 20 Vin=12V 10 Vin=14V 3.20 0 0 100 200 300 400 0 500 100 Vin=10V以下 Vin=12V Vin=14V 400 500 73℃ Load Current Io2 [mA] 800 400 333mA 300 OPERATION R RANGE R Vin=12V以下 Vin=14V 1000 65℃ 75℃ 500 300 Derating Curve (With heat sink) Derating Curve (No heat sink) 600 200 Output Current Io [ｍＡ] Output Current Io [ｍＡ] Load Current Io1 [mA] 200 Output Current Io [ｍＡ] 250mA 200 100 600 505mA OPERATION RANGE 400 200 0 0 -40 -20 0 20 40 60 80 -40 100 www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. -20 0 20 40 60 80 100 Ambient Temperature Ta [℃] Ambient Temperature Ta [℃] 6/7 2011.08 - Rev. A BP5275-18 / BP5275-25 / BP5275-33 / BP5275-50 Data Sheet ●BP5275-50 Line Regulation Output Voltage vs. Temperature Fluctuation（Vin=12V） 5.10 5.08 5.08 5.06 5.06 Output Voltage Vo [V] Output Voltage Vo [V] 5.10 5.04 5.02 5.00 4.98 4.96 Ta= 80°C 4.94 5.02 5.00 4.98 4.96 Ta= 80°C 4.94 Ta= 25°C 4.92 5.04 Ta= 25°C 4.92 Ta=−35°C Ta=−35°C 4.90 4.90 0 2 4 6 8 10 12 14 16 0 100 Intput Voltage Vin [V] 100 5.08 90 Power Conversion Efficiencyη[%] 5.10 Output Voltage Vo [V] 5.06 5.04 5.02 5.00 4.98 4.96 Vin= 6V Vin=12V 4.92 Vin=14V 80 70 60 50 40 30 Vin= 6V 20 Vin=12V 10 Vin=14V 4.90 0 0 100 200 300 400 Output Current Io [ｍＡ] 500 0 100 400 500 72℃ Load Current Io2 [mA] 800 400 333mA 300 OPERATION R RANGE R Vin=12V以下 Vin=14V 1000 65℃ 75℃ 500 300 Derating Curve (With heat sink) Vin=10V以下 Vin=12V Vin=14V 600 200 Output Current Io [ｍＡ] Derating Curve (No heat sink) Load Current Io1 [mA] 500 Power Conversion Efficiency Fluctuation（Ta=25°C） Output Voltage vs. Input Voltage Fluctuation（Ta=25°C） 4.94 200 300 400 Output Current Io [ｍＡ] 250mA 200 100 600 480mA OPERATION RANGE 400 200 0 0 -40 -20 0 20 40 60 80 -40 100 www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. -20 0 20 40 60 80 100 Ambient Temperature Ta [℃] Ambient Temperature Ta [℃] 7/7 2011.08 - Rev. A Notice Notes No copying or reproduction of this document, in part or in whole, is permitted without the consent of ROHM Co.,Ltd. The content specified herein is subject to change for improvement without notice. The content specified herein is for the purpose of introducing ROHM's products (hereinafter "Products"). If you wish to use any such Product, please be sure to refer to the specifications, which can be obtained from ROHM upon request. Examples of application circuits, circuit constants and any other information contained herein illustrate the standard usage and operations of the Products. The peripheral conditions must be taken into account when designing circuits for mass production. Great care was taken in ensuring the accuracy of the information specified in this document. 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