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參數(shù)資料
| 型號(hào)： | R1232D221A |
| 廠商： | Ricoh Co., Ltd. |
| 英文描述： | PWM STEP-DOWN DC/DC CONVERTER WITH SYNCHRONOUS RECTIFIER |
| 中文描述： | PWM降壓型DC / DC變換器的同步整流 |
| 文件頁數(shù)： | 5/24頁 |
| 文件大小： | 819K |
| 代理商： | R1232D221A |
R1232D
ELECTRICAL CHARACTERISTICS
R1232DxxxA/C
5
Topt
=
25
°
C
Unit
V
Symbol
V
IN
Item
Conditions
Min.
2.6
×
0.980
0.784 0.800 0.816
Typ.
Max.
5.5
×
1.020
Operating Input Voltage
V
OUT
V
FB
Step-down Output Voltage
V
IN
=
V
CE
=
5.0V, I
OUT
=
10mA
V
V
Feedback Voltage
V
IN
=
V
CE
=
5.0V, I
OUT
=
10mA
V
OUT
/
Topt Temperature Coefficient
fosc
Oscillator Frequency
I
DD
Supply Current
40°C
<
=
Topt
<
=
85°C
±
150
ppm/
°
C
MHz
μ
A
μ
A
V
IN
=
V
CE
=
V
SET
+1.5V
V
IN
=
V
CE
=
5.5V, V
OUT
=
5.5V
V
CE
=
V
OUT
=
0V, V
IN
=
5.5V
V
IN
=
5.5V,V
CE
=
0V
V
LX
=
0V/5.5V
0.75
70
1.00
140
1.25
190
Istandby
Standby Current
0.0
5.0
I
LXleak
L
X
Leakage Current
5.0
0.0
5.0
μ
A
R
ONP
ON Resistance of Pch Transistor V
IN
=
5.0V, I
LX
=
200mA
ON Resistance of Nch Transistor V
IN
=
5.0V, I
LX
=
200mA
0.20
0.35
R
ONN
0.20
0.35
Maxduty
Oscillator Maximum Duty Cycle
100
%
ms
tstart
Soft-start Time
V
IN
=
V
CE
=
5.0V, at no load
V
IN
=
V
CE
=
5.0V
V
IN
=
V
CE
=
5.0V
V
IN
=
V
CE
=2.6
V-> 1.5V
0.5
1.0
1.4
tprot
Protection Delay Time
0.1
2.0
10.0
ms
I
LX
limit
Lx Current Limit
1.0
1.4
A
V
UVLO1
UVLO Detector Threshold
2.10
2.25
V
UVLO1
+
0.10
0.0
2.40
V
V
UVLO2
UVLO Released Voltage
V
IN
=
V
CE
=
1.5V-> 2.6V
2.20
2.50
V
I
CE
CE Input Current
V
IN
=
5.5V, V
CE
=
5.5V/0V
V
IN
=
5.5V, V
CE
=0V,
V
OUT
=
5.5V/0V
V
IN
=
5.5V
V
IN
=
3.0V
V
IN
=
3.0V
0.1
0.1
μ
A
μ
A
I
VOUT
V
OUT
Leakage Current
0.1
0.0
0.1
V
CEH
CE "H" Input Voltage
1.5
V
V
CEL
CE "L" Input Voltage
0.3
V
V
TESTL
TEST pin "L" Input Voltage
0.3
V
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PDF描述 |
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| R1232D221B | PWM STEP-DOWN DC/DC CONVERTER WITH SYNCHRONOUS RECTIFIER |
| R1232D231A | PWM STEP-DOWN DC/DC CONVERTER WITH SYNCHRONOUS RECTIFIER |
| R1232D231B | PWM STEP-DOWN DC/DC CONVERTER WITH SYNCHRONOUS RECTIFIER |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| R1232D221B | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:PWM STEP-DOWN DC/DC CONVERTER WITH SYNCHRONOUS RECTIFIER |
| R1232D231A | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:PWM STEP-DOWN DC/DC CONVERTER WITH SYNCHRONOUS RECTIFIER |
| R1232D231B | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:PWM STEP-DOWN DC/DC CONVERTER WITH SYNCHRONOUS RECTIFIER |
| R1232D241A | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:PWM STEP-DOWN DC/DC CONVERTER WITH SYNCHRONOUS RECTIFIER |
| R1232D241B | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:PWM STEP-DOWN DC/DC CONVERTER WITH SYNCHRONOUS RECTIFIER |
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