參數(shù)資料
型號(hào): R1234D261B
廠商: Ricoh Co., Ltd.
英文描述: PWM/VFM Step-Down DC/DC CONVERTER with Synchronous Rectifier
中文描述: 脈寬調(diào)制/ VFM的降壓型DC / DC同步整流變換器
文件頁數(shù): 21/26頁
文件大?。?/td> 876K
代理商: R1234D261B
R1234D
6) Output Ripple Voltage vs. Output Current
21
7) Output Voltage vs. Temperature
R1234D181B
R1234D181B
0
80
50
30
60
70
10
40
20
50
450
100
250
400
150
Output Current I
OUT
(m
A
)
500
200
350
300
V
IN
=5.0V
V
IN
=3.3V
C
OUT
=10
μ
F, Tantalum, ESR=400m
O
R
m
V
1.70
1.90
1.80
1.85
1.75
-40 -25
50
75
0
85
25
Temperature Topt(
°
C)
I
OUT
=100m
A
O
V
O
(
8) Output Voltage vs. Input Voltage
9) Frequency vs. Temperature
R1234D181B
10) Supply Current vs. Temperature
1.60
2.00
1.80
1.90
1.65
1.70
1.85
1.95
1.75
2
3
4
6
5
Input Voltage V
IN
(
V
)
I
OUT
=20m
A
O
V
O
(
300
1000
600
800
400
700
900
500
Temperature Topt(
°
C)
V
IN
=V
OUT
+1.5V
F
f
(
800kHz
500kHz
-40 -25
50
75
0
85
25
11) Soft-start Time vs. Temperature
R1234D181B
100
450
250
350
150
300
400
200
Temperature Topt(
°
C)
V
IN
=5.5V
S
I
D
(
μ
A
800kHz
500kHz
-40 -25
50
75
0
85
25
0
3.0
1.5
2.5
0.5
2.0
1.0
Temperature Topt(
°
C)
S
t
(
m
)
800kHz
500kHz
-40 -25
50
75
0
85
25
V
IN
=3.3V
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