BD9855MWV Datasheet, PDF (1/5 Pages) Rohm – Silicon Monolithic Integrated Circuit

1/4
STURUCTURE
Type
PRODUCUT SERIES
Silicon Monolithic Integrated Circuit
4 Channel Switching Regulator control system for DSC
BD9855MWV
THYSICAL DIMENSIONS Package(Plastic Mold) Fig.1、Block Diagram Fig.2、Pin Description Fig.3
FEATURES
●Include step-down 2ch,Cross converter 1ch,step down/inverting 1ch.
●Short Circuit Protection (SCP), Under Voltage Lockout Function (UVLO),
Include external synchronous rectification operation
●Independent ON/OFF Function Each Channel、UQFN044V6060 Package（0.4mm pitch）
○Absolute Maximum Ratings（Ta=25℃）
Parameter
Symbol
Limits
Units
Power Supply Voltage
VCC,PVCC
－0.3～15
V
BST1-LX1、BST2-LX2
－0.3～7
V
Input Voltage
LX31
Vo3,LX32
－0.3～15
V
－0.3～8.4
V
PG,SYNC, CTL1,2,3,4
－0.3～15
V
SEL
－0.3～7
V
Power Dissipation
Pd
540(*1),1000(*2)
mW
O p e r a t i n g Te m p e r a t u r e
Topr
－25～+85
℃
St o r a g e Te m p e r a t u r e
Tstg
－55～+150
℃
J u n c t i o n Te m p e r a t u r e
Tjmax
150
℃
(*1) Without external heat sink, the power dissipation degrades by 4.2mW/℃ above 25℃.
(*2)Power dissipation degrades by 8.0mW/℃ above 25℃, when mounted on a PCB (70mm×70mm×1.6mm).
○Operating Conditions
Parameter
Symbol
MIN
Spec.
TYP
Unit
MAX
【Input Voltage】
Power Supply Voltage
VCC,PVCC
4
6
14
V
【Reference Output】
VREG,VREGA terminal capacitor
CVR*
0.47
1.0
2.2
μF
VREF terminal capacitor
CVREF
0.047
0.1
2.2
μF
【Protect Circuit】
SCP terminal capacitor
CSCP
0.001
－
2.2
μF
【Oscillator】
Oscillator frequency
Fosc
0.6
1.0
1.5
MHz
OSC timming resistor
RT
47
82
120
kΩ
RTSS terminal capacitor
CRTSS
1000
10000
－
pF
SYNC terminal input H
VSYNCH
3.0
-
VCC
V
SYNC terminal input L
VSYNCL
-0.3
-
0.5
V
SYNC terminal input Duty
Dsync
40
50
60
%
【Driver】
BST-Lx voltage
Vbst
3.5
－
5.5
V
BST-Lx capacitor
Cbst
0.047
0.1
0.22
μF
LX31terminal input voltage
VLX31
－
－
14
V
CH3 output range
VVOUT3
4.0
－
7.0
V
PVCC1,2,4 terminal input voltage
PVCC1,2,4
－
－
14
V
CH1,2,3output current
Ioutch1,2,3
－
－
1
A
※)Please connect capacitor at input/output terminal (VCC,PVCC,VREF,VREG etc.) to operate IC stabilize.
Condition
Status of this document
The Japanese language version of this document shall be the official specification.
Any translation of this document shall be for reference only.
REV. C