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Non-Isolated Step-Down 3-Terminal DC/DC Converters

BP5275-18 / BP5275-25 / BP5275-33 / BP5275-50

Data Sheet

2011.08 -

Rev. A

www.rohm.com

BP5275−18 BP5275−25 BP5275−33

4.5 to 14 4.5 to 14 5.0 to 14 V

1.8 2.5 3.3 V

500 / 800 500 / 800 500 / 800 mA

BP5275−50

BP5275−18 BP5275−25 BP5275−33 BP5275−50

6.0 to 14

5.0

73 78 83 88

500 / 800

Unit

Parameter Symbol

Limits

Unit

In V

O1max

IO2max

°C

Topr

Tstg

Tcmax

°C

23.0 MAX

13.8 MAX

2xC0.5

C0.5

5.2

0.5

4.0±1.0

2.6

4.2

5.2

20.3

2.54

0.2

0.75

2.54

0.2

1.3

Pin No.1 2 3

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).

Description

Dimensions (Unit : mm)

Applications

Features

List of the series

Absolute maximum ratings (Ta=25°C)

Power supplies for copiers, personal computers,

facsimiles, AV equipment, measuring instruments,

vending machines, security device, registers,

industrial equipment, and maintenance tools

7) Compact package.

BP5275-18 / BP5275-25 / BP5275-33 / BP5275-50 : SIP3

2) High power conversion efficiency.

3) Heat sink unnecessary.

Input voltage

Operating temperature range

Storage temperature range

Allowable maximum surface temperature

Maximum output current 1

Maximum output current 2

(with Heat Sink)

Output voltage

Power conversion

efficiency (Vin=12V)

Maximum output current

(no heat sink / include heat sink)

Note : Dimensions without tolerance is typical.

1) No external parts required

4) Low output ripple voltage

5) High output voltage accuracy

6) Pin-compatible with conventional 3-pin LDOs

−30 to 85

−40 to 105

100

500

800

−30 to 85

−40 to 105

100

500

800

−30 to 85

−40 to 105

100

500

800

−30 to 85

−40 to 105

100

500

800

Summary of content (9 pages)

PAGE 1
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.
PAGE 2
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.
PAGE 3
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.
PAGE 4
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.
PAGE 5
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.
PAGE 6
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.
PAGE 7
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.
PAGE 8
PAGE 9
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.