R1111N/R1121N Series
150mA LDO
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The R1111N/R1121N Series are CMOS-based LDO regulators featuring 150mA output. (Under 1.5V VOUT 1.7V conditions, 100mA)
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R1111N/R1121N has a high maximum input voltage rating of 8V, which makes the product ideally suitable for use in power source for
various equipment, including hand-held communication equipment. The polarity of the CE pin can be selected. Two different pin
layout as R1111N and R1121N are available.
FEATURES
• Supply Current (ISS) ························Typ. 35μA (VIN=SET VOUT+1V)
• Standby Current (Istandby) ·················Typ. 0.1μA (Same as above, in standby)
• Dropout Voltage (VDIF) ····················Typ. 0.2V (IOUT=100mA, VOUT=2.8V)
• Ripple Rejection (RR)·····················Typ. 70dB (f=1kHz)
• 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. 50mA
• Package··········································SOT-23-5
• Replaceable with LP2980, LP2985. (R1111N)
• Replaceable with TK111, TK112, or TK113. (R1121N)
• Input Voltage Range (VIN)···············2.0V to 8.0V
• Output Voltage Range (VOUT)··········1.5V to 5.0V (internally fixed)
BLOCK DIAGRAMS
R1111Nxx1A
R1121Nxx1A
R1111Nxx1B
R1121Nxx1B
(CE pin "H" active)
(
"L" active)
CE
pin
V
OUT
VDD
VOUT
VDD
Vref
Vref
Current Limit
Current Limit
GND
CE
GND
CE
SELECTION GUIDE
.
xx
.
: Specify the output voltage within the range 1.5V (
in 0.1V steps.
.
15
.
) to 5.0V (
.
50
.
)
Package
Quantity per Reel
Part No.
R1111N
.
xx
.
1
.
∗-TR-F
: Select the polarity of the CE pin from (
∗
.
A
.
) "L" active or (
.
B
.
) "H" active.
.
SOT-23-5
3,000 pcs
R1121N
.
xx.
1.
∗-TR-F
PACKAGE (Top View)
TYPICAL CHARACTERISTIC
R1111N301B
SOT-23-5
R1121N301B Dropout Voltage vs. Output Current
0.40
5
4
85°C
0.35
25°C
0.30
-40°C
0.25
0.20
1
2
3
R1111N
R1121N
0.15
0.10
0.05
0
1
2
3
4
5
VDD
GND
1
2
3
4
5
VOUT
GND
VDD
or CE
CE
NC
VOUT
or CE
CE
NC
0
50
100
150
Output Current IOUT(mA)
APPLICATIONS
• Power source for hand-held communication equipment, cameras, and VCRs
• Power source for home appliances
• Power source for battery-powered equipment
No.EK-073-091101
CMOS LDO Regulator
RICOH [ RICOH ELECTRONICS DEVICES DIVISION ]
