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參數(shù)資料
| 型號(hào)： | RH5RI503B-T1 |
| 廠商： | RICOH COMPANY LTD |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | VFM STEP-UP DC/DC CONVERTER |
| 中文描述： | 0.25 A SWITCHING REGULATOR, 120 kHz SWITCHING FREQ-MAX, PDSO5 |
| 封裝： | SOT-89, 5 PIN |
| 文件頁數(shù)： | 22/24頁 |
| 文件大?。?/td> | 179K |
| 代理商： | RH5RI503B-T1 |
6
RH5RI
RH5RI501B
Unless otherwise provided, VIN=3V, Vss=0V, IOUT=10mA, Topt=25C, and use External Circuit of Typical
Application (FIG. 1).
Symbol
Item
VOUT
Output Voltage
VIN
Input Voltage
Vstart
Start-up Voltage
Vhold
Hold-on Voltage
IIN1
Input Current 1
IIN2
Input Current 2
ILX
Lx Switching Current
ILXleak
Lx Leakage Current
fosc
Maximum Oscillator
Frequency
Maxdty
Oscillator Duty Cycle
η
Efficiency
VLXlim
VLX Voltage Limit
Conditions
MIN.
TYP.
MAX.
Unit
Note
4.875
5.000
5.125
V
8V
IOUT=1mA,VIN:0
→2V
0.8
0.9
V
IOUT=1mA,VIN:2
→0V
0.7
V
To be measured at VIN
at no load
612
A
To be measured at VIN
25
A
VIN=5.5V
VLX=0.4V
80
mA
VLX=6V,VIN=5.5V
0.5
A
80
100
120
kHz
on (VLX “L” ) side
65
75
85
%
70
80
%
Lx Switch On
0.65
0.8
1.0
V
Note2
VOUT=5.0V
(Note)
ILX is gradually increased by the external inductor after Lx Switch is turned ON. In accordance with the increase of ILX, VLX is also increased.
When VLX reaches VLXlim, Lx Switch is turned OFF by Lx Switch Protection Circuit. The time period from the time at which VLX reaches VLXlim to
the time at which Lx Switch is turned OFF is about 3s.
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