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参数资料
| 型号： | RH5RH433B-T2 |
| 厂商： | RICOH COMPANY LTD |
| 元件分类： | 稳压器 |
| 英文描述： | PWM STEP-UP DC/DC CONVERTER |
| 中文描述： | 0.25 A SWITCHING REGULATOR, 100 kHz SWITCHING FREQ-MAX, PDSO5 |
| 封装： | SOT-89, 5 PIN |
| 文件页数： | 7/29页 |
| 文件大小： | 199K |
| 代理商： | RH5RH433B-T2 |
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6
RH5RH
RH5RH501A
V
OUT
=5.0V
Unless otherwise provided, V
IN
=3V, Vss=0V, I
OUT
=10mA, Topt=25C, and use External Circuit of Typical
Application (FIG. 1).
(Note 1) Soft-Start Circuit is operated in the following sequence :
(1) V
IN
is applied.
(2) The voltage (Vref) of the reference voltage unit is maintained at 0V for about 200μs after the application of V
IN
.
(3) The output of Error Amp. is raised to “H” level during the maintenance of the voltage (Vref) of the reference voltage unit.
(4) After the rise of Vref, the output of Internal Error Amp. is gradually decreased to an appropriate value by the function of Internal Phase
Compensation Circuit, and the Output Voltage is gradually increased in accordance with the gradual decrease of the output of Internal Error
Amp.
(Note 2) I
LX
is gradually increased after Lx Switch is turned ON. In accordance with the increase of I
LX
, V
LX
is also increased. When V
LX
reaches V
LX
lim
,
Lx Switch is turned OFF by an Lx Switch Protection Circuit.
Symbol
Item
V
OUT
Output Voltage
V
IN
Input Voltage
Vstart
Start-up Voltage
Vhold
Hold-on Voltage
I
DD
1
Supply Current 1
I
DD
2
Supply Current 2
I
LX
Lx Switching Current
I
LX
leak
Lx Leakage Current
fosc
Oscillator Frequency
Maxdty
Oscillator Maximum Duty
Cycle
η
Efficiency
t
start
Soft-Start Time
V
LX
lim
V
LX
Voltage Limit
Conditions
MIN.
TYP.
MAX.
Unit
Note
4.875
5.000
5.125
V
8
V
Iout=1mA,Vin:0
→
2V
0.8
0.9
V
Iout=1mA,Vin:2
→
0V
0.7
V
To be measured at OUT Pin
(excluding Switching Current)
30
45
μA
To be measured at OUT Pin
(excluding Switching Current)
V
IN
=5.5V
2
5
μA
V
LX
=0.4V
80
mA
V
LX
=6V,V
IN
=5.5V
0.5
μA
40
50
60
kHz
on (V
LX
“L” ) side
70
80
90
%
70
85
%
Time required for the rising
of V
OUT
up to 5V.
0.5
2.0
ms
Note1
Lx Switch ON
0.65
0.8
1.0
V
Note2
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相关代理商/技术参数 |
参数描述 |
|---|---|
| RH5RH441A | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog IC |
| RH5RH441A-T1 | 制造商:RICOH 制造商全称:RICOH electronics devices division 功能描述:PWM STEP-UP DC/DC CONVERTER |
| RH5RH441A-T2 | 制造商:RICOH 制造商全称:RICOH electronics devices division 功能描述:PWM STEP-UP DC/DC CONVERTER |
| RH5RH442B | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog IC |
| RH5RH442B-T1 | 制造商:RICOH 制造商全称:RICOH electronics devices division 功能描述:PWM STEP-UP DC/DC CONVERTER |
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