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R1224N 数据表(PDF) 6 Page - RICOH electronics devices division

部件名 R1224N
功能描述  PWM/VFM step-down DC/DC Converter
Download  42 Pages
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制造商  RICOH [RICOH electronics devices division]
网页  http://www.ricoh.com
标志 RICOH - RICOH electronics devices division

R1224N 数据表(HTML) 6 Page - RICOH electronics devices division

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R1224N
R1224N102X (X=G/H/M)
Topt=25
°C
Symbol
Item
Conditions
Min.
Typ.
Max.
Unit
VIN
Operating Input Voltage
2.3
18.5
V
VFB
Feedback Voltage
VIN
=VCE=3.5V, IFB=−100mA
0.98
1.00
1.02
V
VFB/
Topt
Feedback Voltage
Temperature Coefficient
−40°C <= Topt <= 85°C
±100
ppm/°C
fosc
Oscillator Frequency
VIN
=VCE=3.5V, IFB=−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
IDD1
Supply Current 1
VIN
=VCE=VFB=18.5V
M Version
G Version
H Version
20
30
40
50
60
80
µA
Istandby
Standby Current
VIN
=18.5V, VCE=0V, VFB=0V
0.0
0.5
µA
IEXTH
EXT “H” Output Current
VIN
=8V, VEXT=7.9V, VFB=8V,
VCE
=8V
−17
−10
mA
IEXTL
EXT “L” Output Current
VIN
=8V, VEXT=0.1V, VFB=0V,
VCE
=8V
20
30
mA
ICEH
CE “H” Input Current
VIN
=VCE=VFB=18.5V
0.0
0.5
µA
ICEL
CE “L” Input Current
VIN
=VFB=18.5V, VCE=0V
−0.5
0.0
µA
VCEH
CE “H” Input Voltage
VIN
=8V, VFB=0V
1.5
V
VCEL
CE “L” Input Voltage
VIN
=8V, VFB=0V
0.3
V
Maxdty
Oscillator Maximum Duty Cycle
100
%
VUVLO1
UVLO Voltage
VIN
=VCE=2.5V to 1.5V, VFB=0V
1.8
2.0
2.2
V
VUVLO2
UVLO Release Voltage
VIN
=VCE=1.5V to 2.5V, VFB=0V
VUVLO1
+0.1
2.3
V
tstart
Delay Time by Soft-Start function
VIN
=2.5V, IFB=−10mA
VCE
=0V→2.5V
5
10
20
ms
tprot
Delay Time for protection circuit
VIN
=VCE=2.5V
VFB
=2.5V→0V
5
15
30
ms
6


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