R1250V311A 查看數據表（PDF） - RICOH Co.,Ltd.
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R1250V311A Datasheet PDF : 14 Pages
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R1250V××1A
ELECTRICAL CHARACTERISTICS
R1250V××1A
(Unless otherwise provided, VIN=5.0V, Topt=25°C, CP, COUT = Ceramic 4.7µF)
Symbol
Item
Conditions
MIN. TYP. MAX. Unit
Set Output Voltage = -2.7V to -2.0V
2.7
VIN Operating Input Voltage
Set Output Voltage = -4.0V to -2.8V |Set VOUT|
5.5
V
-2.4V to -2.0V
1.50 2.30
ISS Supply Current
Operation: Active,
for IC itself *Note1
-2.9V to -2.5V
-3.4V to -3.0V
1.60 2.55
mA
1.70 2.75
-4.0V to -3.5V
1.80 3.00
ISTB Shut-down Current
Operation: Shut-down, for IC
itself *Note2
0.1
1
µA
-2.4V to -2.0V ×0.95
×1.05
IOUT=0mA/10mA
-2.9V to -2.5V
-3.4V to -3.0V
×0.96
×0.97
×1.04
×1.03
VOUT Output Voltage
IOUT=50mA
-4.0V to -3.5V
-2.4V to -2.0V
×0.97
×0.88
×1.03
V
×1.12
-2.9V to -2.5V ×0.89
×1.11
IOUT=75mA
-3.4V to -3.0V ×0.91
×1.09
-4.0V to -3.5V ×0.92
×1.08
Vref Reference Voltage*Note3
No load
VOUT
V
∆VOUT/
∆IOUT
Load Regulation
IOUT=10mA to 50mA -2.4V to -2.0V
IOUT=10mA to 75mA -4.0V to -2.5V
0.7
mV/
mA
fosc Oscillator Frequency
Output Frequency
238
280 322 kHz
∆fosc/∆T
Oscillator Frequency
Temperature Coefficient
±0.25
kHz/
°C
Duty Oscillator Duty Cycle
At no Load
50
%
VSDH CE “H” Input Voltage
1.5
V
VSDL CE “L” Input Voltage
0.25 V
RPU CE Pull-up Resistance
0.68
1.25 3.00 MΩ
RO
Resistance between
VOUT and GND
5
kΩ
*Note1 Refer to Test Circuit 1.
*Note2: Refer to Test Circuit 6.
*Note3: Do not connect ant load. Refer to Technical Notes.
*Use Ceramic Capacitors with low ESR. Capacitors with high ESR could have bad effect on the performance of this IC.
5
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