參數(shù)資料
型號: R1224N332E
廠商: Ricoh Co., Ltd.
英文描述: PWM/VFM step-down DC/DC Converter
中文描述: 脈寬調(diào)制/ VFM的降壓型DC / DC轉(zhuǎn)換器
文件頁數(shù): 6/42頁
文件大?。?/td> 876K
代理商: R1224N332E
R1224N
R1224N102X (X=G/H/M)
Topt=25
°
C
Symbol
Item
Conditions
Min.
Typ.
Max.
Unit
V
IN
Operating Input Voltage
2.3
18.5
V
V
FB
Feedback Voltage
Feedback Voltage
Temperature Coefficient
V
IN
=
V
CE
=
3.5V, I
FB
=
100mA
0.98
1.00
1.02
V
V
FB
/
Topt
40°C
<
=
Topt
<
=
85°C
±
100
ppm/°C
fosc
Oscillator Frequency
V
IN
=
V
CE
=
3.5V, I
FB
=
100mA
M Version
G Version
H Version
144
240
400
180
300
500
216
360
600
kHz
fosc/
Topt
Oscillator Frequency
Temperature Coefficient
40°C
<
=
Topt
<
=
85°C
±
0.2
%/°C
I
DD1
Supply Current 1
V
IN
=
V
CE
=
V
FB
=
18.5V
M Version
G Version
H Version
V
IN
=
18.5V, V
CE
=
0V, V
FB
=
0V
V
IN
=
8V, V
EXT
=
7.9V, V
FB
=
8V,
V
CE
=
8V
V
IN
=
8V, V
EXT
=
0.1V, V
FB
=
0V,
V
CE
=
8V
V
IN
=
V
CE
=
V
FB
=
18.5V
V
IN
=
V
FB
=
18.5V, V
CE
=
0V
V
IN
=
8V, V
FB
=
0V
V
IN
=
8V, V
FB
=
0V
20
30
40
0.0
50
60
80
0.5
μ
A
Istandby
Standby Current
μ
A
I
EXTH
EXT “H” Output Current
17
10
mA
I
EXTL
EXT “L” Output Current
20
30
mA
I
CEH
CE “H” Input Current
0.0
0.5
μ
A
μ
A
I
CEL
CE “L” Input Current
0.5
0.0
V
CEH
CE “H” Input Voltage
1.5
V
V
CEL
CE “L” Input Voltage
0.3
V
Maxdty
Oscillator Maximum Duty Cycle
100
%
V
UVLO1
UVLO Voltage
V
IN
=
V
CE
=
2.5V to 1.5V, V
FB
=
0V
1.8
2.0
V
UVLO1
+
0.1
2.2
V
V
UVLO2
UVLO Release Voltage
V
IN
=
V
CE
=
1.5V to 2.5V, V
FB
=
0V
2.3
V
tstart
Delay Time by Soft-Start function
V
IN
=
2.5V, I
FB
=
10mA
V
CE
=
0V
2.5V
V
IN
=
V
CE
=
2.5V
V
FB
=
2.5V
0V
5
10
20
ms
tprot
Delay Time for protection circuit
5
15
30
ms
6
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