bd9350mwv ROHM Co. Ltd., bd9350mwv Datasheet

bd9350mwv

Manufacturer Part Number

bd9350mwv

Description

7-channel Switching Regulator Controller For Digital Camera

Manufacturer

ROHM Co. Ltd.

Datasheet

1.BD9350MWV.pdf (5 pages)

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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

OSC Timing Resistor

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 channe.l

●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(CH1～4), 600kHz(CH5～7).

●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 32 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

V o l t a g e

Silicon Monolithic Integrated Circuit

7-Channel Switching Regulator Controller for Digital Camera

BD９３５０MWV

Fig.1

Fig.2

MIN

0.47

1.5

－

1.0

0.6

TYP

Limit

1.0

1.2

MAX

0.47

120

5.5

4.7

1.5

IomaxHS6～7

IomaxHx3～4

IomaxLx6～7

IomaxLx1

IomaxHx2

VHx1～4

VLx6～7

Symbol

HS67H

VBAT

MHz

Tjmax

Unit

μF

kΩ

Topr

Tstg

VIN

REV. A

○CH7 recommended operating conditions

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

Fixed L when OFF

Parameter

－55～+150

－25～+85

－0.3～20

－0.3～7

0.54 (*1)

-0.3～7

±1.2

±1.5

±1.2

±0.8

Limit

+150

Symbol

T(OFF)

T(CLR)

T(SET)

T(ON)

T(EN)

T(H)

T(L)

65X1/fosc

5X1/fosc

MIN

420

Unit

℃

Limits

TYP

2048X1/fosc

63X1/fosc

10000

MAX

[nS]

Unit

1/4

[S]

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bd9350mwv Summary of contents

Page 1

STRUCTURE Silicon Monolithic Integrated Circuit PRODUCT SERIES 7-Channel Switching Regulator Controller for Digital Camera BD９３５０MWV 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 MAX 【Charge Pump Circuit】 Output Voltage Vcpout1 5.2 5.4 － (Regulated) Output Voltage Vcpout2 4.5 4.8 － Step up) Output Vcpro － Resistance Operating ...

Page 3

Assignment ・Block Diagram PGND567 ○Pin Description Pin Name Description VBAT Input for battery voltage Returning voltage VIN from output terminal Output terminal CPOUT for Charge Pump GND Ground terminal Terminal for connecting flying C+H capacitor for Charge Pump(H side) ...

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 ...

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