bd8674kn ROHM Co. Ltd., bd8674kn Datasheet

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bd8674kn

Manufacturer Part Number
bd8674kn
Description
Dc/dc Converter Ic For Camera Module For Car Navigation System
Manufacturer
ROHM Co. Ltd.
Datasheet
output function
STRUCTURE
PRODUCT NAME
MODEL NAME
PACKAGE OUTLINE
BLOCK DIAGRAM
◎FEATURES:
◎ABSOLUTE MAXIMUM RATING:(Ta=25℃)
◎OPERATION CONDITION
* 70mm×70mm, thickness1.6mm, less than 3% share of copper foil when implementing glass epoxy board.
This product is not designed for protection against radioactive rays.
VIN supply voltage
PVIN supply voltage
Power dissipation
Operating temperature
Storage temperature
Operating at higher than Ta=25℃, 5.8mW shall be reduced per 1
VIN supply voltage
Parameter
Parameter
・+3.3V output Step down DC/DC converter for synchronous rectification system
・Double booster charger pump
・+5V output LDO
・Soft start function
・Building in low voltage and over voltage protection function
・The frequency can be set by external resistance
・Concentrated protection control with built-in sequencer
・VQFN-28 package
・Building in terminal RT OPEN/Short protection
(Please set the power-supply voltage in consideration of a power dissipation.)
Silicon Monolithic Integrated Circuit
DC/DC converter IC for camera module for car navigation system
B D 8 6 7 4 K N
Fig. - 1
Fig. - 2
Symbol
Symbol
PVIN
Topr
Tstg
VIN
VIN
Pd
REV. C
MIN
4.5
-40
-55
Limits
0.725
TYP
18V
VIN
6.0
*
+85
+150
MAX
9.0
Unit
Unit
W
V
V
V
・Building in external reset
1/5

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bd8674kn Summary of contents

Page 1

STRUCTURE : PRODUCT NAME : MODEL NAME : PACKAGE OUTLINE : BLOCK DIAGRAM : ◎FEATURES: ・+3.3V output Step down DC/DC converter for synchronous rectification system ・Double booster charger pump ・+5V output LDO ・Soft start function ・Building in low voltage and ...

Page 2

CHARACTERISTICS (Unless otherwise noted Ta=25℃, VIN=6.0V,PVIN=6.0V,V33IN=3.3V,V66IN=6.6V,GND=0V) Parameter VIN,PVIN Circuit current 1 VIN,PVIN Circuit current 2 <Step-down DC/DC converter of 3.3V output part> 3.3V output voltage Terminal V33 Input bias current Terminal V33 Discharge resistance Terminal FC33 Clamping voltage H ...

Page 3

ASSIGNMENT No. Symbol Description 1 FB5 5V output voltage detection terminal regulator output terminal 3 V66IN LDO6.6V voltage input terminal 4 V66 Charge pump voltage output terminal 5 CP Capacity connection terminal for charge pump (+) ...

Page 4

DIAGRAM 4.5V-9V FB33 SS33 6800pF RT 27kΩ TEST1 TEST2 TEST3 TEST4 EN1 EN2 BLOCK DIAGRAM and recommended external parts constant –fig.2 *TEST1,2,3,4 terminal should be connected. *PVIN and VIN terminal should be connected each other. *Phase compensation circuit of ...

Page 5

ON USE 1.About the absolute maximum rating Attention is brushed off enough to the quality control likely to destroy when the absolute maximum rating such as impressed voltages (VCC_IN,DCIN) and ranges (Topr) of the operating temperature as ...

Page 6

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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