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Rohm Semiconductor Electronic Components Datasheet

BH6559FV Datasheet

DC/DC Converter for CD/DVD-ROM Slim

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BH6559FV pdf
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BH6559FV
DC/DC converter for CD/DVD-ROM slim
BH6559FV
BH6559FV is an IC that incorporates 1 channel variable DC/DC converter and reset function. Variable DC/DC converter
can set high-precision voltage (±2% precision) by trimming reference voltage.
!Applications
CD/DCD-ROM slim
!Features
1) Low current consumption by adopting synchronous
rectifier type.
2) Few external components reduced by the built-in power
MOS transistor.
3) Adjustable by external resistor of DC/DC converter output.
4) Built-in reset for supply voltage and ATAPI
(output pin is common).
5) Built-in delay time setting function for supply voltage reset.
!External dimensions (Units : mm)
5.0 ± 0.2
16 9
18
0.15 ± 0.1
0.65 0.1
0.22 ± 0.1
SSOP-B16
!Absolute maximum ratings (Ta=25°C)
Parameter
Symbol
Limits
Unit
Supply voltage 1 (PRE block)
PREVCC1
7
V
Supply voltage 2 (PRE block)
PREVCC2
7
V
Supply voltage (PRE block)
Pin output current (DSW block)
Power dissipation
POWVCC
Iswomax
Pd
7
1 1
0.56 2
V
A
W
Operating temperature range
Topr
30 to +85
C
Storage temperature range
Tstg
55 to +150
C
1 Intermittent current at maximum applied time of 5msec,1/10 duty (Max.)
2 Derating : 4.5mv/ C for operation above Ta=25 C. On less than 3% (percentage occupied by copper foil),
70mm 70mm, t=1.6mm, glass epoxy mounting.
1/3


Rohm Semiconductor Electronic Components Datasheet

BH6559FV Datasheet

DC/DC Converter for CD/DVD-ROM Slim

No Preview Available !

BH6559FV pdf
Optical discs
!Recommended Operating Conditions (Ta=25°C)
Parameter
Symbol Min.
Supply voltage 1 (PRE block)
PREVCC1 4.5
Supply voltage 2 (PRE block)
PREVCC2 4.5
Supply voltage (Pow block)
POWVCC
Ambient temperature
Vatiable DC/DC converter output current
Ta
Io
4.5
10
Vatiable DC/DC converter output voltage
When L=47µH, C=47µF is used
VDD
1.7
Typ. Max. Unit
5.0 5.5
V
5.0 5.5
V
5.0 5.5
V
25 70 C
300 500 mA
VCC1 V
BH6559FV
!Electrical characteristics (Ta=25°C, PREVCC1/2=5V, POWVCC=5V)
Parameter
Symbol Min. Typ. Max.
Current consumption at no signal
< Varible DC/DC converter >
ICC
1.2 24
EI pin threshold voltage
VEITH 0.980 1.00 1.020
DSW pin ON resistance H
RDSWONH
0.42 0.87
DSW pin ON resistance L
RDSWONL
0.30 0.60
DSW pin oscollation frequency
fDSW
210
310
410
< Reset block >
Vcc reset ON voltage
VRSTON 3.52 3.70 3.88
Vcc reset hysteresis width
VRSTHYS 50
80 110
Vcc reset delay time
VRSTT
30
50
70
ATAPI reset ON voltage
VATPON 1.25 1.40 1.55
ATAPI reset hysteresis width
VATPHYS 40 60 90
This product is not designed for protection against redioactive rays.
Unit Conditions
mA No load
V
IL=500mA
IL=-500mA
kHz OSC_R=22k
V
mV
msec
V
mV
sweep down
RESET τ=0.1µF
sweep down
2/3


Part Number BH6559FV
Description DC/DC Converter for CD/DVD-ROM Slim
Maker Rohm
Total Page 4 Pages
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BH6559FV Datasheet PDF
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