BH6559FV
Optical discs
1/3
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 !External dimensions (Units : mm)
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.








!Absolute maximum ratings (Ta=25°C)
PREVCC2
POWVCC
Topr
Tstg
PREVCC1 V
V
V
Parameter UnitSymbol
C
C
Iswomax
Pd
Limits
7
7
7
−30 to +85
−55 to +150
A1
∗1
0.56
∗2
∗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.
+
Supply voltage 1 (PRE block)
Supply voltage 2 (PRE block)
Supply voltage (PRE block)
Pin output current (DSW block)
Power dissipation
Operating temperature range
Storage temperature range
W











SSOP-B16
9
8
16
1
0.1
6.4
±
0.3
4.4
±
0.2
5.0 ± 0.2
0.15 ± 0.1
0.22 ± 0.1
0.65
1.15
±
0.1
0.3Min.
0.1