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參數(shù)資料
| 型號(hào)： | RN5RF51BA-TR-F |
| 廠商： | RICOH COMPANY LTD |
| 元件分類(lèi)： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING REGULATOR, PDSO5 |
| 封裝： | LEAD FREE, SOT-23, 5 PIN |
| 文件頁(yè)數(shù)： | 1/2頁(yè) |
| 文件大?。?/td> | 138K |
| 代理商： | RN5RF51BA-TR-F |
RN5RF Series
LDO with External Tr.
No.EK-072-091101
CMOS LDO Regulator
The RN5RF Series are CMOS-based LDO regulators with external power transistor. By using an external PNP transistor, a low
dropout voltage regulator ranging from several tens of mA to several hundreds mA can be configured. (Use a low saturation type PNP
transistor with hFE of approximately 100 to 300.)
FEATURES
Supply Current (I
SS
) Typ. 30
μA (VIN=SET VOUT+1V)
Standby Current (I
standby
) Typ. 0.1
μA (VIN=10V, In standby)
Dropout Voltage (V
DIF
) Typ. 0.1V
(IOUT=100mA, VOUT=2.8V)
Ripple Rejection (RR)Typ. 60dB (f=1kHz, V
OUT >
= 1.6V)
Typ. 50dB
(f=1kHz, VOUT <
= 1.5V)
Input Voltage Range (V
IN
) 1.8V to 10.0V
Output Voltage Range (V
OUT
) 1.2V to 6.0V (internally fixed)
Output Voltage Accuracy ± 2%
Temp. coeff. of Output Voltage Typ. ± 100ppm/°C
Line Regulation Typ. 0.05%/V
Fold-back Protection Circuit Current limit Typ. 8mA
(Base current limit of PNP Tr.)
Package SOT-23-5
) The value depends on the capacity of the external PNP transistor.
BLOCK DIAGRAMS
RN5RFxxA
RN5RFxxB
( CE pin "L" active)
(CE pin "H" active)
2
5
1
VOUT
GND
VDD
CE
Vref
3
Current Limit
+
-
4
EXT
2
5
1
VOUT
GND
VDD
CE
Vref
3
Current Limit
+
-
4
EXT
SELECTION GUIDE
TYPICAL APPLICATION
Package
Quantity per Reel
Part No.
SOT-23-5
3,000 pcs
RN5RF.xx
A-TR-F
.xx. : Specify the output voltage within the range 1.2V (.12.) to 6.0V (.60.)
in 0.1V steps.
.
. : Select the polarity of the CE pin from (.A.) "L" active or (.B.) "H" active.
PNP Tr
EXT
OUT
C2
+
GND
CE
VDD
IN
RN5RFxxA
VOUT
C1
+
4
3
1
5
2
C1, C2 : Tantalum capacitor of 10
μF
PNP transistor : 2SB766A
PACKAGE (Top View)
TYPICAL CHARACTERISTIC
SOT-23-5
1
3
5
4
2
1
GND
2
VDD
3
VOUT
4
EXT
5
CE or CE
RN5RF30A
Dropout Voltage vs. Output Current
85°C
25°C
-40°C
Output Current IOUT(mA)
Dropout
Voltage
V
DIF
(V)
300
0
100
200
400
500
0.5
0.2
0.4
0.3
0.1
0
APPLICATIONS
Power source for hand-held communication equipment, cameras, and VCRs
Power source for home appliances
Power source for battery-powered equipment
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