RH5RH301A Datasheet, PDF (8/29 Pages) RICOH electronics devices division – PWM STEP-UP DC/DC CONVERTER

RH5RH
• RH5RH302B
Symbol
Item
VOUT
Output Voltage
VIN
Input Voltage
Vstart
Oscillator Start-up Voltage
IDD1
Supply Current 1
IDD2
Supply Current 2
IEXTH
EXT “H” Output Current
IEXTL
EXT “L” Output Current
fosc
Oscillator Frequency
Conditions
EXT no load,VOUT :0→2V
EXT no load,VOUT=2.88V
EXT no load,VOUT=3.5V
VEXT=VOUT–0.4V
VEXT=0.4V
MIN.
TYP. MAX.
VOUT=3.0V
Unit Note
2.925 3.000 3.075 V
8
V
0.7 0.8
V
30 50 µA
2
5
µA
–1.5 mA
1.5
mA
80 100 120 kHz
Maxdty
Oscillator Maximum Duty
Cycle
VEXT “H” side
70
80 90
%
tstart
Soft-Start Time
Time required for the rising _0.5
2.0
of VOUT up to 3V
ms Note1
Unless otherwise provided, VIN=1.8V, Vss=0V, IOUT=10mA, Topt=25˚C, and use External Circuit of Typical
Application (FIG. 2).
• RH5RH502B
VOUT=5.0V
Symbol
Item
Conditions
MIN. TYP. MAX. Unit Note
VOUT
Output Voltage
4.875 5.000 5.125 V
VIN
Input Voltage
8
V
Vstart
Oscillator Start-up Voltage
EXT no load,VOUT :0→2V
0.7 0.8
V
IDD1
Supply Current 1
EXT no load,VOUT=4.8V
60 90 µA
IDD2
Supply Current 2
EXT no load,VOUT=5.5V
2
5
µA
IEXTH
EXT “H” Output Current
VEXT=VOUT–0.4V
–2 mA
IEXTL
EXT “L” Output Current
VEXT=0.4V
2
mA
fosc
Oscillator Frequency
80 100 120 kHz
Maxdty
Oscillator Maximum Duty
Cycle
VEXT “H” side
70
80 90
%
tstart
Soft-Start Time
Time required for the rising _0.5
2.0
of VOUT up to 5V
ms Note1
Unless otherwise provided, VIN=3V, Vss=0V, IOUT=10mA, Topt=25˚C and use External Circuit of Typical
Application (FIG. 2).
(Note 1) refer to page 5 (Note 1)
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