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参数资料
| 型号： | R1250V471A-E2 |
| 厂商： | RICOH COMPANY LTD |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING CONTROLLER, PDSO8 |
| 封装： | 0.65 MM PITCH, TSSOP-8 |
| 文件页数： | 9/13页 |
| 文件大小： | 127K |
| 代理商： | R1250V471A-E2 |
12345
Rev. 1.10
- 5 -
n
n ELECTRICAL CHARACTERISTICS
lR1250Vxx1A
(Unless otherwise provided, VIN=5.0V, Topt=25
°C, CP, COUT = Ceramic 4.7mF)
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
-2.9V to –2.5V
1.60
2.55
-3.4V to –3.0V
1.70
2.75
Iss
Supply Current
Operation: Active,
for IC itself*Note1
-4.0V to –3.5V
1.80
3.00
mA
ISTB
Shut-down Current
Operation: Shut-down, for IC itself
*Note2
0.1
1
P
A
-2.4V to –2.0V
u0.95
u1.05
-2.9V to –2.5V
u0.96
u1.04
-3.4V to –3.0V
u0.97
u1.03
IOUT=0mA/10mA
-4.0V to –3.5V
u0.97
u1.03
IOUT=50mA
-2.4V to –2.0V
u0.88
u1.12
-2.9V to –2.5V
u0.89
u1.11
-3.4V to –3.0V
u0.91
u1.09
VOUT
Output Voltage
IOUT=75mA
-4.0V to –3.5V
u0.92
u1.08
V
VREF
Reference Voltage(Note
3)
No load
~VOUT
V
IOUT=10mA to 50mA -2.4V to –2.0V
'VOUT/
'IOUT
Load Regulation
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
r0.25
kHz/
q
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
M
:
RO
Resistance between
VOUT and GND
5k
:
*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.
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