bd9351mwv ROHM Co. Ltd., bd9351mwv Datasheet
bd9351mwv
Manufacturer Part Number
bd9351mwv
Description
7-channel Switching Regulator Controller For Digital Camera
Manufacturer
ROHM Co. Ltd.
Datasheet
1.BD9351MWV.pdf
(5 pages)
STRUCTURE
PRODUCT SERIES
TYPE
PIN ASSIGNMENT
BLOCK DIAGRAM
PACKAGE
Functions
Status of this document
○Absolute maximum ratings (Ta=25℃)
The Japanese version of this document is the official specification. Please use the translation version of this document as a reference to expedite understanding of the official version.
○Recommended operating conditions
Power Supply Voltage
VREF Pin Connecting Capacitor
VREGA Pin Connecting Capacitor
SCP Pin Connecting Capacitor
C+H to C+L connecting Capacitor
【Oscillator】
Oscillator Frequency (CH1,3,4)
OSC Timing Resistor
P o w e r
P o w e r
O u t p u t
P o w e r
O p e r a t i n g
S t o r a g e
J u n c t i o n
Parameter
If these are any uncertainty in translation version of this document, official version takes priority.
(*1) Without external heat sink, the power dissipation reduces by 4.32mW/℃ over 25℃。
S u p p l y
I n p u t
●1.5V minimum input operating
●Supplies power for the internal circuit by using charge-pump circuit which outputs a voltage twice bigger than VBATvoltage.
●Contains step-up converter(1ch), step-down converter(2ch), cross converter(1ch), configurable for step-up/step-down converter(1ch),
●Contains 4FETs for the cross converter channel.
●3channels contain transistor for synchronous rectifying action mode.
●2channels contain FETs for the step-up converter.
●All channels contain internal compensation between inputs outputs of error amps.
●Contains sequence control circuit for ch1,2 and 4.
●Operating frequency 1.2MHz(CH1,3,4), 600kHz(CH2,5,6,7).
●Contains output interception circuit when over load.
●2 channels have high side switches with soft start function, one channel has PMOS back gate control circuit.
●Thermally enhanced UQFN044V6060 package.(6mm x 6mm, 0.4mm pitch)
D i s s i p a t i o n
or a equal voltage as VBAT + VIN.
with 59 step brightness controller for step-up converter(1ch).
Parameter
T e m p e r a t u r e
T e m p a r e t u r e
T e m p e r a t u r e
CVREGA
CVREF
Symbol
CSCP
VBAT
C u r r e n t
fosc
CF
RT
V o l t a g e
V o l t a g e
Silicon Monolithic Integrated Circuit
7-Channel Switching Regulator Controller for Digital Camera
BD９３５１MWV
Fig.1
Fig.2
Fig.1
MIN
0.47
0.47
1.0
1.5
－
0.6
47
TYP
Limit
1.0
1.0
1.2
62
-
-
-
MAX
0.47
120
5.5
4.7
4.7
1.5
-
IomaxHx4, Lx4
IomaxHS6～7
IomaxLx6～7
VHx1～4
IomaxLx1
IomaxHx2
IomaxHx3
VLx6～7
Symbol
HS67H
VBAT
Tjmax
MHz
Unit
μF
μF
μF
μF
kΩ
Topr
Tstg
VIN
V
Pd
○CH7 recommended operating conditions
REV. A
Brightness setting time When start-up
Fixed H when determine brightness
Fixed L before setting brightness
Fixed H when setting brightness
Fixed L when setting brightness
Fixed H when EN start-up
－55～+150
Fixed L when OFF
－25～+85
－0.3～20
－0.3～7
－0.3～7
－0.3～7
0.54 (*1)
-0.3～7
±0.4
±1.5
±1.2
±2.2
±1.2
±0.8
Parameter
Limit
+150
Symbol
T(OFF)
T(CLR)
T(SET)
T(ON)
T(EN)
T(H)
T(L)
Unit
℃
℃
℃
V
V
V
V
V
A
A
A
A
A
A
W
65X1/fosc
65X1/fosc
5X1/fosc
5X1/fosc
MIN
420
420
-
Limits
TYP
-
-
-
-
-
-
-
2048X1/fosc
63X1/fosc
10000
10000
MAX
-
-
-
1/4
[nS]
[nS]
Unit
[S]
[S]
[S]
[S]
[S]
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bd9351mwv Summary of contents
Page 1
STRUCTURE Silicon Monolithic Integrated Circuit PRODUCT SERIES 7-Channel Switching Regulator Controller for Digital Camera BD９３５１MWV TYPE PIN ASSIGNMENT Fig.1 BLOCK DIAGRAM Fig.1 PACKAGE Fig.2 Functions ●1.5V minimum input operating ●Supplies power for the internal circuit by using charge-pump circuit which ...
Page 2
VBAT=3V, RT=62k, STB1～6=3V,UPIC7=2.5V） Standard value Parameter Symbol MIN TYP 【Charge Pump Circuit】 Output Voltage Vcpout1 5.2 5.4 (Regulated) Output Voltage Vcpout2 4.5 4 Step up) Output Vcpro － 35 Resistance Operating fcp 60 75 Frequency ...
Page 3
Assignment ・Block Diagram ○Package 1.0V CHARGE PUMP OSC VREF REF 2. NON5 34 REG + UVLO INV6 - TSD 35 ...
Page 4
Notes １.) Absolute maximum ratings This product is produced with strict quality control. However, the IC may be destroyed if operated beyond its absolute maximum ratings. If the device is destroyed by exceeding the recommended maximum ratings, the failure ...
Page 5
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 ...