BD3502FVM-TR Rohm Semiconductor, BD3502FVM-TR Datasheet

BD3502FVM-TR

Manufacturer Part Number

BD3502FVM-TR

Description

IC REG LDO 1.2V NCH FET 8MSOP

Manufacturer

Rohm Semiconductor

Type

Positive Fixedr

Datasheet

1.BD3502FVM-TR.pdf (17 pages)

Specifications of BD3502FVM-TR

Number Of Outputs

Voltage - Output

1.2V

Voltage - Input

4.5 ~ 5.5 V

Operating Temperature

-10°C ~ 100°C

Package / Case

8-MSOP

Polarity

Positive

Output Type

Fixed

Output Voltage

1.2 V

Line Regulation

0.5 % / V

Load Regulation

10 mV

Input Voltage Max

5.5 V

Maximum Operating Temperature

+ 100 C

Minimum Operating Temperature

- 40 C

Maximum Power Dissipation

437.5 mW

Mounting Style

SMD/SMT

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Current - Supply

Lead Free Status / Rohs Status

Lead free / RoHS Compliant

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

BD3502FVM-TR

Manufacturer:

ROHM/罗姆

Quantity:

20 000

Current page: 1 of 17
Download datasheet (543Kb)

High Performance Regulators for PCs

Nch FET Ultra LDO Controllers

for PC Chipsets

●Description

●Features

●Applications

●Line up matrix

www.rohm.com

BD3504FVM,BD3500FVM,BD3501FVM,BD3502FVM

The BD3500/01/02/04FVM is an ultra-low dropout linear regulator controller for chipset that can achieve ultra-low voltage

input to ultra-low voltage output. By using N-MOSFET for external power transistor, the controller can be used at ultra-low

I/O voltage difference up to voltage difference generated by ON resistance. In addition, because best suited power

transistor can be chosen in accord with the output current, downsizing and cost reduction of the set can be achieved.

Because by reducing the I/O voltage difference, large current output is achieved and conversion loss can be reduced,

switching power supply can be replaced. BD3500/01/02/04FVM does not need any choke coil, diode for rectification and

power transistor which are required for switching power supply, total cost of the set can be reduced and compact size can be

achieved for the set. Using external resistors, optional output from 0.65V to 2.5V can be set. In addition, since voltage

output start-up time can be adjusted by using the NRCS terminal, it is possible to flexibly meet the power supply sequence of

the set.

Mobile PC, desktop PC, digital home appliances

Output Voltage

NRCS

(Soft start)

Timer latch short

protection circuit

External FET

GATE Drive Current

1) Reduced rush current by NRCS

2) Built-in driver for external Nch h transistor

3) Adoption of MSOP8 package: 2.9 x 4.0 x 0.9 (mm)

4) Built-in timer latch short protection circuit

5) Built-in low input maloperation prevention circuit

6) Output voltage variable type

7) Built-in overheat protection circuit

UVLO

Parameter

(Independent Setting)

BD3500FVM

1.8V (Fix)

Hysterisis

+1/-3mA

○

(Independent Setting)

BD3501FVM

1.5V (Fix)

Hysterisis

+1/-3mA

1/16

○

(Independent Setting)

BD3502FVM

1.2V (Fix)

Hysterisis

+1/-3mA

○

Detected at start-up only

(set by external resistor)

Variable(0.65～2.5V)

(Same Timer Latch)

2010.05 - Rev.A

(Same NRCS)

BD3504FVM

+3/-3mA

No.10030EAT29

○

Related parts for BD3502FVM-TR

BD3502FVM-TR Summary of contents

Page 1

... ROHM Co., Ltd. All rights reserved. BD3501FVM 1.5V (Fix) ○ ○ (Independent Setting) ○ ○ (Independent Setting) Hysterisis +1/-3mA 1/16 No.10030EAT29 BD3502FVM BD3504FVM 1.2V (Fix) Variable(0.65～2.5V) ○ ○ (Independent Setting) (Same Timer Latch) ○ ○ (Independent Setting) (Same NRCS) Detected at start-up only ...

Page 2

... BD3504FVM,BD3500FVM,BD3501FVM,BD3502FVM ●Absolute maximum ratings (Ta=25℃) ◎BD3500/01/02FVM Parameter Input Voltage Drain Voltage (VIN) Enable Input Voltage Power Dissipation Operating Temperature Range Storage Temperature Range Maximum Junction Temperature *1 However, not exceeding Pd derating at 3.5mW/℃ for temperature above Ta=25℃ ◎BD3504FVM Parameter Supply Voltage ...

Page 3

... Shut Down Mode Current Output Voltage 1 (BD3500FVM) Output Voltage 1 (BD3501FVM) Output Voltage 1 (BD3502FVM) Output Voltage 2 (BD3500FVM) Output Voltage 2 (BD3501FVM) Output Voltage 2 (BD3502FVM) Line Regulation Load Regulation [Enable] High Level Enable Input Voltage Low Level Enable Input Voltage Enable Pin Input Current ...

Page 4

... BD3504FVM,BD3500FVM,BD3501FVM,BD3502FVM ●Electrical characteristics (unless otherwise noted, Ta=25℃ VCC=5V VIN=3.3V Ven=3V. R1=R1'=∞Ω, R2=R2'=0Ω) ◎BD3504FVM Parameter Bias Current Shut Down Mode Current Feed Back Voltage 1 Feed Back Voltage 2 Output Voltage Line Regulation Load Regulation [Enable] High Level Enable Input Voltage ...

Page 5

... BD3504FVM,BD3500FVM,BD3501FVM,BD3502FVM ●Reference Data 1.40 1.20 1.00 0.80 0.60 0.40 0.20 0.00 -60 - Ta( ℃ ) Fig.1 Ta-I STB 100 125 Ta( ℃ ) Fig.4 Ta-I EN 1.26 1.255 1.25 1.245 1.24 1.235 1.23 -60 - Ta( ℃ ) Fig.7 Ta-Vo VCC VIN EN VOUT (1.075V 出力) Fig.10 Input Sequence 3 Vcc www ...

Page 6

... Fig.17 Transient Response 3→0A(0.6A/µs) ΔV=27mV VOUT (1.05V 出力) IOUT (1A/div) Fig.20 Transient Response 0→3A(0.6A/µs) ΔV=44mV 6/16 Technical Note VOUT (BD3502FVM) IOUT (1A/div) Fig.15 Transient Response 3→0A(0.6A/µs) ΔV=17mV VOUT (BD3500FVM) IOUT (1A/div) Fig.18 Transient Response 0→3A(0.6A/µs) ΔV=44mV VOUT (1.05V 出 ...

Page 7

... BD3504FVM,BD3500FVM,BD3501FVM,BD3502FVM ●Block Diagram ◎BD3500FVM/BD3501FVM/BD3502FVM VCC VCC 4 Enabe EN Reference 8 Block Thermal Protection TSD ◎BD3504FVM VCC VCC 4 EN Enable Reference 3 Block Thermal Protection TSD NRCS www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. NRCS 1 NRCS UVLO1 UVLO2 VREF VREF TSD SCP UVLO1 UVLO2 ...

Page 8

... BD3504FVM,BD3500FVM,BD3501FVM,BD3502FVM ●Pin Configration and Pin Function ◎BD3500FVM/BD3501FVM/BD3502FVM ○Pin Configration NRCS 1 2 GND 3 SCP 4 VCC ◎BD3504FVM ○Pin Configration 1 NRCS 2 GND VCC www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. ○Pin Function Pin Pin No. Name NRCS (Non Rush Current on Start up) time setup 2 GND ...

Page 9

... When the NRCS terminal reaches 1.3V (Voscp), latch operation is carried out and output voltage is turned OFF. ・VFB//VS (BD3500FVM/BD3501FVM/BD3502FVM//BD3504FVM) VFB//VS terminal is a source voltage detection terminal of external N-MOSFET. VFB//VS terminal has the internal discharge circuit activated to lower output voltage when EN becomes a Low level or various protection circuits (TSD, SCP, UVLO) are activated. ・ ...

Page 10

... BD3504FVM,BD3500FVM,BD3501FVM,BD3502FVM ●Application circuit Vcc C3 Ven C1 Vcc ●Directions for pattern layout of PCB ・Because a VIN input capacitor causes impedance to drop, mount it as close to the VIN terminal as possible and use thick wiring patterns. In the event that it causes the wire to come in contact with the inner-layer ground plane, use a plurality of through holes. ・ ...

Page 11

... BD3504FVM,BD3500FVM,BD3501FVM,BD3502FVM ●Evaluation Board (BD3500/01/02FVM) ■ BD350XFVM Evaluation Board Circuit ■ U1 VCC BD350XFVM SCP 1 NRCS C2 C3 VCC 4 VCC C1 2 GND BD350XFVM Evaluation Board Layout ■ ■ Silk Screen ●Evaluation Board (BD3504FVM) BD3504FVM Evaluation Board Circuit ■ ■ U1 BD3504FVM 8 VCC NRCS VCC 4 VCC ...

Page 12

... BD3504FVM,BD3500FVM,BD3501FVM,BD3502FVM ●I/O EQUIVALENCE CIRCUIT ◎BD3500FVM/BD3501FVM/BD3502FVM Vcc Vcc Vcc NRCS Vcc Vcc GATE ◎BD3504FVM Vcc Vcc NRCS Vcc Vcc GATE www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved 12/16 Technical Note Vcc Vcc Vcc SCP Vcc Vcc VFB Vcc Vs Vcc VFB 2010.05 - Rev.A ...

Page 13

... BD3504FVM,BD3500FVM,BD3501FVM,BD3502FVM ●Notes for use 1. Absolute maximum ratings For the present product, thoroughgoing quality control is carried out, but in the event that applied voltage, working temperature range, and other absolute maximum rating are exceeded, the present product may be destroyed. Because it is unable to identify the short mode, open mode, etc., if any special mode is assumed, which exceeds the absolute maximum rating, physical safety measures are requested to be taken, such as fuses, etc ...

Page 14

... BD3504FVM,BD3500FVM,BD3501FVM,BD3502FVM 10. Output capacitor (C5) Connect the output capacitor between Vo1, Vo2 terminals and GND terminal without fail in order to stabilize output voltage. The output capacitor has a role to compensate for the phase of loop gain and to reduce output voltage fluctuation when load is rapidly changed. When there is an insufficient capacity value, there is a possibility to cause oscillation, and when the equivalent serial resistance (ESR) of the capacitors is large, output voltage fluctuation is increased when load is rapidly changed. About 220 µ ...

Page 15

... BD3504FVM,BD3500FVM,BD3501FVM,BD3502FVM ●Power Dissipation 500 437.5mW 400 300 200 100 0 0 www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 100℃ 100 Temperature Atmosphere : Ta(℃) 15/16 Technical Note Without heat sink. θj-a=286℃/W 125 150 2010.05 - Rev.A ...

Page 16

... BD3504FVM,BD3500FVM,BD3501FVM,BD3502FVM ●Ordering part number Part No. Part No. 3504 3500 3501 3502 MSOP8 2.9±0.1 (MAX 3.25 include BURR) + 6° 4° −4° 1PIN MARK 0.145 0.475 S +0.05 −0.04 0.22 0.08 S 0.65 www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved Package FVM: MSOP8 < ...

Page 17

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 ...

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