Regulators ICs for Digital Cameras and Camcorders
System Switching Regulator IC
with Built-in FET (5V)
BD9355MWV
●Description
7 Channel Switching Regulator Controller for Digital Camera that contains an internal FET.
Built in the function that dim a white LED for back light with a diming set signal from a microcomputer.
●Features
1) 1.5V minimum input operating
2) Supplies power for the internal circuit by step-up converter(CH1).
3) CH1step-up converter, CH2 cross converter, CH3,4 step-down converter,
CH5 inverting converter for CCD, CH6 boost converter for CCD, CH7 boost converter for LED
4) All channels contain internal Power MOSFET and compensation.
Built-In Over Voltage Protection (OVP) for CH1,2,7
5) Operating frequency 2.0MHz(CH3,4), 1MHz(CH1,2,5½7)
6) Contains sequence control circuit for CH1½4. It is possible to select sequence CH1⇒CH3⇒CH4⇒CH2 and
CH1⇒CH4⇒CH3⇒CH2 by SEQ_CTL pin
7) Built-In discharge switch (CH2,3,4) and contains off sequence control circuit for CH1½4.
CH1,3 turn off after CH2,4 output voltage discharged.
8) Built-In Short-circuit Protection (SCP)
9) CH1 have backgate control circuit CH6 have high side switches with soft start function.
10) Thermally enhanced UQFN036V5050 package(5mm□0.4mm pitch)
●Applications
For Digital Camera
●Absolute
maximum ratings (Ta=25℃)
Parameter
Maximum applied power
Supply voltage
Symbol
HX2BAT,VCCOUT
VHx1½4, 56
Maximum applied
input voltage
( Hx56 - Lx5) Voltage
VLx6
VLx7
IomaxHx1, Lx1
IomaxHx2
IomaxHx3
Maximum Output current
IomaxHx4
IomaxHx56
IomaxHS6L
IomaxLx7,8
Power Dissipation
Operating Temperature
Storage Temperature
Maximum applied power
Supply voltage
Pd
Topr
Tstg
HX2BAT,VCCOUT
Ratings
-0.3½7
-0.3½7
-0.3½15
-0.3½22
-0.3½30
±2.2
±1.5
±1.2
±1.0
±1.5
+1.2
±1.0
0.88 (*1)
-25½+85
-55½+150
+150
Unit
V
V
V
V
V
A
A
A
A
A
A
A
W
℃
℃
℃
No.11036EAT15
*1 Should be derated by 7.04mW/℃ at Ta=25℃ or more. When mounted on a glass epoxy PCB of 74.2mm×74.2 mm×1.6 mm
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© 2011 ROHM Co., Ltd. All rights reserved.
1/22
2011.03 - Rev.A
BD9355MWV
●Operating
condition
Ratings
Parameter
Power supply voltage
VREF terminal connection capacity
PWM7 input frequency range
【Driver】
CH1 NMOS/PMOS drain current
CH2 Hx2BAT input current
CH3 PMOS drain current
CH4 PMOS drain current
CH5 PMOS drain current
CH6 HS6L input current
CH6,7 NMOS drain current
【Output
voltage setting range】
CH1
CH2
CH3
CH4
CH5
CH6
CH7
4.5
(※)
1.0
1.0
-9.5
5.5
5.5
－
－
－
－
－
－
－
5.4
5.4
4.4
4.4
-1.5
16
26
V
V
V
V
V
V
V
Idpl1
Iin2
Idpl3
Idpl4
Idpl5
Idpl6
Idnl6,7
－
－
－
－
－
－
－
－
－
－
－
－
－
－
2.1
1.4
1.0
0.5
1.4
1.1
0.9
A
A
A
A
A
A
A
Symbol
Min.
VBAT
CVREF
fpwm
1.5
0.047
20
Typ.
-
0.1
-
Max.
5.5
0.47
100
V
µF
kHz
Unit
Technical Note
Conditions
※Use
with the following range.
※Use
with VBAT<Vo6
※Use
with VBAT<Vo7
●CH2
output voltage setting range
maximum in pu t voltage - CH2 output voltage settin g ran ge
6.0
5.4V
5.0
o u tpu t vo ltag e se ttin g [V]
Output voltage setting range
4.0
3.0V
3.0
2.0
1.0
1.75V
minimum setting value = (maximum input voltage + 0.5V)×0.5
0.0
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
m ax im u m in pu t vo ltage [V]
Fig.1 CH2 output voltage setting range
Ripple voltage level of CH2 cross converter would be big by cross talk with embedded oscillator when oscillating Duty of
step down side is 50 %. Therefore please not to set oscillating duty of CH2 with 50%.
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2/22
2011.03 - Rev.A
BD9355MWV
●Protective
functions
Parameter
CH1 step-up synchronous rectification
CH2 step-up voltage.
CH3 step-down synchronous
rectification
CH4 step-up synchronous rectification
CH5 inverse Di rectification
CH6 step-up Di rectification
CH7 step-up back light
●Over
current protective part
Limits
Parameter
CH1 LX1 OCP detecting current
CH2 HX2BAT OCP detecting current
CH3 HX3 OCP detecting current
CH4 HX4 OCP detecting current
CH5 LX5 OCP detecting current
CH6 HS6L OCP detecting current
CH6 LX6 OCP detecting current
CH7 Lx7 OCP detecting current
●Recommended
maximum load current
Vo
Vin Io_max
(V)
(V)
(mA)
1.8
2.5
CH1
Boost
5.0
3.6
4.2
1.8
CH2
Boost/
Step-
down
2.5
3.2
3.6
4.2
1.8
CH3
Step
down
2.5
1.2
3.6
4.2
2.5
CH4
Step
down
3.0
1.8
3.6
4.2
500
500
1000
1000
500
500
600
600
800
1000
850
850
300
600
400
750
Symbol
Min.
IOCP1
IOCP2
IOCP3
IOCP4
IOCP5
IOCP6H
IOCP6L
IOCP7
2.5
2.0
1.2
1.2
1.8
1.5
1.2
1.2
Typ.
－
－
－
－
－
－
－
－
Max.
－
－
－
－
－
－
－
－
A
A
A
A
A
A
A
A
Unit
SCP
○
○
○
○
○
○
×
OCP
○
○
○
○
○
○
○
OVP
○
×
×
×
×
×
○
Technical Note
Conditions
Stop when shorted output
OVP: VCCOUTmonitor
SCP:INV monitor
SCP:INV monitor
SCP:INV monitor
SCP: Error amp output
(internal node) monitor
SCP: Error amp output
(internal node) monitor
OVP:VO7 monitor
Conditions
condition
L=4.3µH
(TOKO:DE4518C)
C=22µF
R1=390½Ω,
R2=75kΩ
L=4.7µH
(TOKO:DE2815)
C=10µF
R1=440½Ω,
R2=200kΩ
Cc=12pF
L=4.7µH
(TOKO:DE2815)
C=10µF
R1=300½Ω,
R2=600kΩ
L=4.7µH
(TOKO:DE2815)
C=10µF
R1=300½Ω,
R2=240kΩ
Vo
(V)
Vin
(V)
2.5
3.6
Io_max
(mA)
100
100
100
100
30
40
50
50
25
40
40
40
30
40
40
40
condition
L=4.7µH
(TOKO:DE2815)
C=10µF
R1=156kΩ,
R2=30kΩ
Cc=1000pF
L=4.7µH
(TOKO:DE2815)
C=10µF
R1=360kΩ,
R2=30kΩ
CH5 Reversal -6.5
4.2
5.0
2.5
3.0
CH6
Boost
13
4.2
5.0
Boost
(worth
3 light
LED)
1.8
2.5
11.4
3.6
4.2
2.5
CH7
L=4.7µH
(TOKO:DE2815)
C=4.7µF
CH7
Boost
(worth
4 light
LED)
3.6
14
4.2
5.0
L=4.7µH
(TOKO:DE2815)
C=4.7µF
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© 2011 ROHM Co., Ltd. All rights reserved.
3/22
2011.03 - Rev.A
BD9355MWV
Technical Note
●Electrical
characteristics (Unless specified, Ta=25℃, VCCOUT=5.0V, VBAT=3V, STB13½7=3V,UPIC8=2.5V)
Limits
Parameter
Symbol
Unit
Conditions
Min.
Typ.
Max.
【Low-voltage
input malfunction prevention circuit】
Detecting voltage
Release voltage
Hysteresis width
【Short
Circuit Protection】
SCP detect time
Timer start threshold voltage
【Start-up
Circuit】
Frequency
Start-up HX2BAT Voltage
Start-up CH Soft Start Time
【Oscillating
circuit】
Frequency CH3,4
Frequency CH1,2,5-7
Max duty 1(step-up)
Max duty CH2 Lx21
Max dutyCH2 Lx22
Max duty 3, 4(step-down)
Max duty5,6,7
【Error
Amp】
Input Bias current
INV threshold 1
INV threshold 2
INV7 threshold 1
INV7 threshold 2
INV7 threshold 3
INV7 threshold 4
IINV
VINV1
VINV2
VINV71
VINV72
VINV73
VINV74
-
0.79
0.99
570
436
223
15
0
0.80
1.00
600
450
240
30
50
0.81
1.01
630
473
257
45
nA
V
V
mV
mV
mV
mV
INV1½7, NON5=3.0V
CH1,3,4
CH2,6
PWM7, Duty=100%
PWM7, Duty=75%
PWM7, Duty=40%
PWM7, Duty=5%
fosc1
fosc2
Dmax1
Dmax21
Dmax22
Dmax34
Dmax567
1.6
0.8
81
-
81
-
81
2.0
1.0
86
-
86
-
86
2.4
1.2
90
100
90
100
90
MHz
MHz
%
%
%
%
%
Fstart
Vst1
Tss1
150
1.5
1.8
300
-
3.0
600
-
5.3
kHz
V
msec
HX2BAT=1.8V
Tscp
Vtcinv
20
0.38
25
0.48
30
0.58
ms
V
INV monitor CH2½4
Vstd1
Vstd2
⊿Vstd
-
2.3
100
2.3
2.5
200
2.4
2.7
300
V
V
mV
VCCOUT monitor
VCCOUT monitor
【For
Inverting Base Bias Voltage Vref】
CH5 Output Voltage
Line Regulation
Output Current When Shorted
【Soft
Start
】
CH2,5,6 Soft Start Time
CH3,4 Soft Start Time
CH7 Duty Restriction time
(*)
VOUT5
DVLi
Ios
-6.072
-
0.2
-6.000
4.0
1.0
-5.928
12.5
-
V
mV
mA
NON5, 15kΩ, 72kΩ
VCCOUT=2.8½5.5V
Vref=0V
Tss2,5,6
Tss3,4
TDTC
3.1
1.2
5.0
5.3
2.1
8.2
7.4
3.0
11.8
msec
msec
msec
Recommend resistor value over 20kΩ between VREF5 to NON5, because VREF5 current is under 100µA.
This product is not designed for normal operation with in a radioactive environment.
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© 2011 ROHM Co., Ltd. All rights reserved.
4/22
2011.03 - Rev.A
BD9355MWV
●Electrical
characteristics (Ta=25℃, VCCOUT=5.0V, HX,HX2BAT=3.6V, STB1½6=3V,PWM7=2.5V)
Limits
Parameter
Symbol
Unit
Min.
Typ.
Max.
【Output
Driver】
CH1 High side SW ON Resistance
CH1 Low side SW ON Resistance
CH2 Lx21 High side SW ON resistance
CH2 Lx21 Low side SW ON resistance
CH2 Lx22 High side SW ON resistance
CH2 Lx22 Low side SW ON resistance
CH3 High side SW ON Resistance
CH3 Low side SW ON Resistance
CH4 High side SW ON Resistance
CH4 Low side SW ON Resistance
CH5 PMOS SW ON resistance
CH6,7 NMOS SW ON resistance
CH6 Load SW ON resistance
LED PIN SW ON resistance
【Discharge
switch】
CH2 discharge SW
CH3 discharge SW
CH4 discharge SW
【STB1½6】
Active
STB Control Voltage
Non Active
Pull Down Resistance
【PWM7】
PWM7 Threshold
Pull Down Resistance
CH7 Delay time for shutdown
【Circuit
Current】
VCCOUT terminal
Stand-by Current
Hx terminal
Lx terminal
Circuit Current when start-up
(HX2BAT current when voltage supplied
for the terminal)
Circuit Current (VCCOUT current
when voltage supplied for the terminal)
ISTB1
ISTB2
ISTB3
IST
-
-
-
-
-
-
-
150
5
5
5
450
μA
μA
μA
μA
VPWM7
RPWM7
Toff7
1.1
250
200
1.5
400
300
1.9
700
-
V
kΩ
usec
VSTBL1
RSTB1
-0.3
250
-
400
0.3
700
V
kΩ
VSTBH1
1.5
-
5.5
V
ON resistance
ON resistance
ON resistance
RDSW2
RDSW3
RDSW4
-
-
-
500
500
500
1000
1000
1000
Ω
Ω
Ω
RON1P
RON1N
RON21P
RON21N
RON22P
RON22N
RON3P
RON3N
RON4P
RON4N
RON5P
RON6,7N
RON6P
RLED
-
-
-
-
-
-
-
-
-
-
-
-
-
100
60
120
120
120
100
150
120
200
150
450
500
150
2.0
150
120
180
180
180
150
230
180
300
230
700
750
230
3.0
mΩ
mΩ
mΩ
mΩ
mΩ
mΩ
mΩ
mΩ
mΩ
mΩ
mΩ
mΩ
mΩ
Ω
Hx1=5V
Technical Note
Conditions
VCCOUT=5.0V
Hx2BAT=3.6V
VCCOUT=5.0V
VOUT2=3.6V
VCCOUT=5.0V
Hx3=3.6V , VCCOUT=5V
VCCOUT=5.0V
Hx4=3.6V, VCCOUT=5V
VCCOUT=5.0V
Hx56=3.6V
VCCOUT=5.0V
Hx56=3.6V
VCCOUT=5.0V
VCCOUT=5.0V
VCCOUT=5.0V
VCCOUT=5.0V
Step-down Cross- converter
Step-up
HX2BAT=1.5V
INV1½7=1.2V ,
NON5=-0.2V
Icc2
-
5.0
9.7
mA
This product is not designed for normal operation with in a radioactive environment.
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© 2011 ROHM Co., Ltd. All rights reserved.
5/22
2011.03 - Rev.A
MCU
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