Ricoh RV5VH - Manual (Page 3)

RV5VH SERIES
APPLICATION MANUAL
CONTENTS
OUTLINE
......................................................................................................
1
FEATURES
...................................................................................................
1
APPLICATIONS
.............................................................................................
1
RV5VH1
××
/RV5VH2
××
BLOCK DIAGRAMS
...................................................................................
2
PIN CONFIGURATION
................................................................................
3
PIN DESCRIPTION
....................................................................................
3
ABSOLUTE MAXIMUM RATINGS
...............................................................
4
ELECTRICAL CHARACTERISTICS
.............................................................
6
OPERATION
............................................................................................
18
OPERATION OF STEP-UP DC/DC CONVERTER
........................................
21
SELECTION OF PERIPHERAL COMPONENTS
.........................................
22
TYPICAL APPLICATION
...........................................................................
23
TEST CIRCUITS
.......................................................................................
24
TYPICAL CHARACTERISTICS
..................................................................
26
• DC/DC Converter 1
1) Output Voltage vs. Output Current (RV5VH1
××
)
...............................................
26
2) Output Voltage vs. Output Current (RV5VH2
××
)
...............................................
26
3) Efficiency vs. Output Current (RV5VH1
××
)
......................................................
27
4) Efficiency vs. Output Current (RV5VH2
××
)
......................................................
27
5) DC/DC1 Output Voltage vs. Temperature
........................................................
28
6) Oscillator Frequency vs. Temperature
............................................................
28
7) Oscillator Duty Cycle vs. Temperature
...........................................................
28
8) On Resistance of LX vs. Supply Voltage
.........................................................
29
9) EXT1 Output Current vs. Temperature
...........................................................
29
10) Start-up/Hold-on Voltage vs. Output Current
....................................................
29
11) Input Current vs. Intput Voltage
...................................................................
29
• DC/DC Converter 2
12) Output Voltage vs. Output Current
................................................................
30