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REV. A

STRUCTURE

Silicon Monolithic Integrated Circuit

PRODUCT SERIES

7-Channel Switching Regulator Controller for Digital Camera

TYPE

BD９３５１MWV

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 outputs a voltage twice bigger than VBATvoltage.

or a equal voltage as VBAT + VIN.

●Contains step-up converter(1ch), step-down converter(2ch), cross converter(1ch), configurable for step-up/step-down converter(1ch),

with 59 step brightness controller for step-up 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)

○Absolute maximum ratings (Ta=25℃)

Parameter

Symbol

Limit

Unit

Power

Supply

V o ltage

VBAT

－0.3～7

V

Powe r

Inp u t

V o ltage

VHx1～4

－0.3～7

V

HS67H

－0.3～7

V

VLx6～7

－0.3～20

V

VIN

-0.3～7

V

Output

C

urre

nt

IomaxLx1

±0.4

A

IomaxHx2

±1.5

A

IomaxHx3

±1.2

A

IomaxHx4, Lx4

±2.2

A

IomaxHS6～7

±1.2

A

IomaxLx6～7

±0.8

A

Power

Dissipation

Pd

0.54 (*1)

W

O p e r at in g

Tem p er a t u r e

Topr

－25～+85

℃

S t ora ge

T e m pe rat u re

Tstg

－55～+150

℃

J u nc tio n

T e m p a re ture

Tjmax

+150

℃

(*1) Without external heat sink, the power dissipation reduces by 4.32mW/℃ over 25℃。

○Recommended operating conditions

○CH7 recommended operating conditions

Status of this document

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.

If these are anyuncertainty in translation version of this document, official version takes priority.

Parameter

Symbol

Limits

Unit

MIN

TYP

MAX

Fixed H when determine brightness

T(ON)

65X1/fosc

-

-

[S]

Fixed L when OFF

T(OFF)

65X1/fosc

-

-

[S]

Fixed H when setting brightness

T(H)

420

-

10000

[nS]

Fixed L when setting brightness

T(L)

420

-

10000

[nS]

Fixed H when EN start-up

T(EN)

5X1/fosc

-

-

[S]

Fixed L before setting brightness

T(CLR)

5X1/fosc

-

63X1/fosc

[S]

Brightness setting time When start-up

T(SET)

-

-

2048X1/fosc

[S]

Parameter

Symbol

Limit

Unit

MIN

TYP

MAX

Power Supply Voltage

VBAT

1.5

-

5.5

V

VREF Pin Connecting Capacitor

CVREF

0.47

1.0

4.7

μF

VREGA Pin Connecting Capacitor

CVREGA

0.47

1.0

4.7

μF

SCP Pin Connecting Capacitor

CSCP

－

-

0.47

μF

C+H to C+L connecting Capacitor

CF

1.0

-

-

μF

【Oscillator】

Oscillator Frequency (CH1,3,4)

fosc

0.6

1.2

1.5

MHz

OSC Timing Resistor

RT

47

62

120

kΩ