BD89630EFJ [ROHM]

Silicon Monolithic Integrated Circuit; 硅单片集成电路


型号：	BD89630EFJ
厂家：	ROHM
描述：	Silicon Monolithic Integrated Circuit 硅单片集成电路稳压器开关式稳压器或控制器电源电路开关式控制器光电二极管
文件：	总4页 (文件大小：115K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

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STRUCTURE

Silicon Monolithic Integrated Circuit

PRODUCT NAME

1ch DC／DC PWM Converter IC built in synchronous rectifier

TYPE

BD89630EFJ

FEATURES

・Output Voltage：Adjustable(1.0～2.5Ｖ), Output Current：2.0A

・High Efficiency and Fast Transient Response

○ABSOLUTE MAXIMUM RATING（Ta=25℃）

Parameter

Symbol

VCC

Limit

-0.3～+7 *¹

-0.3～+7

0.5 *²

Unit

Power Supply Voltage

EN Voltage

VEN

SW・COMP Voltage

VSW, V_COMP

Pd1

Power Dissipation 1

℃

Power Dissipation 2

Pd2

3.76 *³

Operating Temperature Range

Storage Temperature Range

Maximum Junction Temperature

Topr

-25～+85

-55～+150

+150

Tstg

Tjmax

*¹Pd, ASO and Tjmax=150℃ should not be exceeded.

*²Reduced by 4.0mW for increase in Ta of 1℃ above 25℃.

*³Reduced by 30.0mW for increase in Ta of 1℃ above 25℃.

(when mounted on a board 70.0mm × 70.0mm × 1.6mm Glass-epoxy PCB)

○OPERATING CONDITIONS（Ta=-25～+85℃）

Typ.

Parameter

Power Supply Voltage

EN Voltage

Symbol

VCC

Min.

2.7

Max.

5.5

Unit

5.0

VEN

Vcc

Output Voltage range

SW Average Output Current

VOUT

ISW

1.0

2.5*⁴

2.0*⁵

*⁴In case set output voltage 1.6V or more, VccMin. = Vout +1.8V

*⁵Pd should not be exceeded.

★This product is not designed for protection against radioactive rays.

REV. B

2/3

○ELECTRICAL CHARACTERISTICS

(Unless otherwise specified , Ta=25℃ VCC=5V, EN=VCC, R₁=30kΩ, R₂=7.5kΩ)

Limit

Parameter

Symbol

Unit

Condition

EN=GND

Typ.

Min.

Max.

Standby Current

ISTB

ICC

350

GND

VCC

1.25

μA

Bias Current

600

0.3

EN Low Voltage

VENL

VENH

IEN

Stand-by Mode

Active Mode

VEN=5V

EN High Voltage

2.0

EN Current

μA

MHz

mΩ

Oscillation Frequency

Pch FET ON Resistance

Nch FET ON Resistance

ADJ Reference Voltage

COMP SINK Current

COMP Source Current

UVLO Threshold Voltage

UVLO Hysteresis Voltage

Soft Start Time

FOSC

RONP

RONN

VADJ

0.8

1.2

290

160

0.812

145

VCC=5V

0.788

0.800

ICOSI

ICOSO

VUVLO1

VUVLO2

TSS

μA

VADJ=1.0V

VADJ=0.6V

Vcc=5V→0V

Vcc=0V→5V

2.400

2.425

0.5

2.500

2.550

2.600

2.700

Timer Latch Time

TLATCH

Output Short circuit

Threshold Voltage

VSCP

VOUT×0.5 VOUT×0.7

VOUT=1.0V→0V

○PHYSICAL DIMENSION

○BLOCK DIAGRAM・APPLICATION CIRCUIT

VCC

VREF

Input

D89630

Current

Comp

Current

Sense/

Protect

R Q

Lot No.

Gm Amp

SLOPE

VCC

CLK

Output

Driver

Logic

OSC

UVLO

Soft

Start

GND

TSD

SCP

ADJ

COMP

HTSOP-J8 (unit:mm)

○ SETTING THE OUTPUT VOLTAGE

○PIN No., PIN NAME

Vout

PIN No.

PIN Name

COMP

GND

VCC

N.C

ADJ

The Output Voltage is set by the external resistor divider and is calculated as：

Vout=(R2/R1+1)×VADJ ・・・ ① VADJ：ADJ pin reference Voltage (0.8V typ)

It’ s possible to adjust the output voltage by R1 and R2. (The Vout must be set from 1.0V to 2.5V.)

Resistance R1≒10kΩ is recommended. Please confirm the ripple voltage,

if you can use the resistance more than 100kΩ.

REV. B

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○NOTES FOR USE

(1) Absolute Maximum Ratings

We are careful enough for quality control about this IC. So, there is no problem under normal operation, excluding that it

exceeds the absolute maximum ratings. However, this IC might be destroyed when the absolute maximum ratings, such

as impressed voltages or the operating temperature range, is exceeded, and whether the destruction is short circuit mode

or open circuit mode cannot be specified. Pleases take into consideration the physical countermeasures for safety, such

as fusing, if a particular mode that exceeds the absolute maximum rating is assumed.

(2) GND Potential

Make setting of the potential of the GND terminal so that it will be maintained at the minimum in any operating

state. Furthermore, check to be sure no terminals are at a potential lower than the GND voltage except for SW,

GND terminals including an actual electric transient.

(3) Thermal design

Do not exceed the power dissipation (Pd) of the package specification rating under actual operation, and

please design enough temperature margins.

(4) Short circuit mode between terminals and wrong mounting

In order to mount the IC on a set PCB, pay thorough attention to the direction and offset of the ICs.

Erroneous mounting can destroy the IC. Furthermore, if a short circuit occurs due to foreign matters

entering between terminals or between the terminal and the power supply or the GND terminal, the IC can

destroy

(5) Operation in Strong electromagnetic field

Be noted that using the IC in the strong electromagnetic radiation can cause operation failures.

(6) ASO(Area of Safety Operation.)

Do not exceed the maximum ASO and the absolute maximum ratings of the output driver.

(7) TSD(Thermal Shut-Down) circuit

The thermal shutdown circuit (TSD circuit) is built in this product. When IC chip temperature becomes

higher, the thermal shutdown circuit operates and turns output off. The guarantee and protection of IC are

not purpose. Therefore, please do not use this IC after TSD circuit operates, nor use it for assumption that

operates the TSD circuit.

(8) GND wiring pattern

Use separate ground lines for control signals and high current power driver outputs. Because these high

current outputs that flows to the wire impedance changes the GND voltage for control signal. Therefore,

each ground terminal of IC must be connected at the one point on the set circuit board. As for GND of

external parts, it is similar to the above-mentioned.

(9) Operation in supply voltage range

Functional Circuit operation is guaranteed within operation ambient temperature, as long as it is within

operation supply voltage range. The electrical characteristics standard value cannot be guaranteed.

However, there is no drastic variation in these values, as long as it is within operation supply voltage range.

(10) We are confident in recommending the above application circuit example, but we ask that you carefully

check the characteristics of this circuit before using it. If using this circuit after modifying other external

circuit constants, be careful to ensure adequate margins for variation between external devices and this IC,

including not only static characteristics but also transient characteristics. If switching noise is high, please

insert the schottky barrier diodes between SW pin and GND pin.

(11) Overcurrent protection circuit

The overcurrent protection circuit is built in the output. If the protection circuit operates more than for

specific hours (when the load is short.), the output will be latched in OFF. The output returns when EN is

turned on or UVLO is released again. These protection circuits are effective in the destruction prevention

by broken accident. Please do not use in continuous circuit operation.

(12) Selection of inductor

It is recommended to use an inductor with a series resistance element (DCR) 0.1Ω or less. Especially, in

case output voltage is set 1.6V or more, note that use of a high DCR inductor will cause an inductor loss,

resulting in decreased output voltage. Should this condition continue for a specified period (soft start time +

timer latch time), output short circuit protection will be activated and output will be latched OFF. When

using an inductor over 0.1Ω, be careful to ensure adequate margins for variation between external devices

and this IC, including transient as well as static characteristics. Furthermore, in any case, please start up

the output with EN after supply voltage is within operation range(2.7～5.5V).

REV. B

Notice

N o t e s

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.

However, should you incur any damage arising from any inaccuracy or misprint of such

information, ROHM shall bear no responsibility for such damage.

The technical information speciﬁed herein is intended only to show the typical functions of and

examples of application circuits for the Products. ROHM does not grant you, explicitly or

implicitly, any license to use or exercise intellectual property or other rights held by ROHM and

other parties. ROHM shall bear no responsibility whatsoever for any dispute arising from the

use of such technical information.

The Products speciﬁed in this document are intended to be used with general-use electronic

equipment or devices (such as audio visual equipment, ofﬁce-automation equipment, commu-

nication devices, electronic appliances and amusement devices).

The Products speciﬁed in this document are not designed to be radiation tolerant.

While ROHM always makes efforts to enhance the quality and reliability of its Products, a

Product may fail or malfunction for a variety of reasons.

Please be sure to implement in your equipment using the Products safety measures to guard

against the possibility of physical injury, ﬁre or any other damage caused in the event of the

failure of any Product, such as derating, redundancy, ﬁre control and fail-safe designs. ROHM

shall bear no responsibility whatsoever for your use of any Product outside of the prescribed

scope or not in accordance with the instruction manual.

The Products are not designed or manufactured to be used with any equipment, device or

system which requires an extremely high level of reliability the failure or malfunction of which

may result in a direct threat to human life or create a risk of human injury (such as a medical

instrument, transportation equipment, aerospace machinery, nuclear-reactor controller, fuel-

controller or other safety device). ROHM shall bear no responsibility in any way for use of any

of the Products for the above special purposes. If a Product is intended to be used for any

such special purpose, please contact a ROHM sales representative before purchasing.

If you intend to export or ship overseas any Product or technology speciﬁed herein that may

be controlled under the Foreign Exchange and the Foreign Trade Law, you will be required to

obtain a license or permit under the Law.

Thank you for your accessing to ROHM product informations.

More detail product informations and catalogs are available, please contact us.

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R1120

BD89630EFJ [ROHM]

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