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參數(shù)資料
| 型號： | R1221N50AH |
| 廠商： | Ricoh Co., Ltd. |
| 英文描述： | Step-down DC/DC Converter with Voltage Detector |
| 中文描述： | 降壓直流/直流電壓檢測器 |
| 文件頁數(shù)： | 2/21頁 |
| 文件大?。?/td> | 218K |
| 代理商： | R1221N50AH |
12345
Rev. 1.11 - 2 -
n
BLOCK DIAGRAM
OSC
V
IN
EXT
GND
V
OUT
Vref
Vref
CE
Chip Enable
Soft Start
Protection
PWM/VFM
CONTROL
VD
OUT
n
SELECTION GUIDE
In the R1221N Series, the output voltage, the detector threshold, the oscillator frequency, the optional
function, and the taping type for the ICs can be selected at the user’s request.
The selection can be made by designating the part number as shown below;
R1221NXXXX-TR
-
-
-
a
b c
Code
a
Contents
Setting Output Voltage(V
OUT
):
Stepwise setting with a step of 0.1V in the range of 1.5V to 5.0V is possible.
Setting Detector Threshold(-V
DET
)
Stepwise setting with a step of 0.1V in the range of 1.2V to 4.5V is possible.
A:3.0V
Designation of Oscillator Frequency and Optional Function
A:300kHz, with a PWM/VFM alternative circuit, Latch-type protection
B:500kHz, with a PWM/VFM alternative circuit, Latch-type protection
C:300kHz, without a PWM/VFM alternative circuit, Latch-type protection
D:500kHz, without a PWM/VFM alternative circuit, Latch-type protection
E:300kHz, with a PWM/VFM alternative circuit, Reset-type protection
F:500kHz, with a PWM/VFM alternative circuit, Reset-type protection
G:300kHz, without a PWM/VFM alternative circuit, Reset-type protection
H:500kHz, without a PWM/VFM alternative circuit, Reset-type protection
b
c
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|---|---|
| R1221N34AG | Voltage-Mode SMPS Controller |
| R1221N34AG-TR | Voltage-Mode SMPS Controller |
| R1221N34AH | Voltage-Mode SMPS Controller |
| R1221N34AH-TR | Voltage-Mode SMPS Controller |
| R1221N35AA | Voltage-Mode SMPS Controller |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| R1221N50AH-TR | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:Step-down DC/DC Converter with Voltage Detector |
| R1221N50XA-TR | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:SMPS Controller |
| R1221N50XB-TR | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:SMPS Controller |
| R1221N50XC-TR | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:SMPS Controller |
| R1221N50XD-TR | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:SMPS Controller |
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