R1111N/R1121N Series
150mA LDO
The R1111N/R1121N Series are CMOS-based LDO regulators featuring 150mA output. (Under 1.5V
<
V
OUT
<
1.7V conditions, 100mA)
=
=
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 (I
SS
) ························Typ. 35μA (V
IN
=SET V
OUT
+1V)
•
Standby Current (I
standby
) ·················Typ. 0.1μA (Same as above, in standby)
•
Dropout Voltage (V
DIF
) ····················Typ. 0.2V (I
OUT
=100mA, V
OUT
=2.8V)
•
Ripple Rejection (RR)·····················Typ. 70dB (f=1kHz)
•
Input Voltage Range (V
IN
) ···············2.0V to 8.0V
•
Output Voltage Range (V
OUT
)··········1.5V to 5.0V (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. 50mA
•
Package··········································SOT-23-5
•
Replaceable with LP2980, LP2985. (R1111N)
•
Replaceable with TK111, TK112, or TK113. (R1121N)
BLOCK DIAGRAMS
R1111Nxx1A
R1121Nxx1A
(
CE
pin "L" active)
R1111Nxx1B
R1121Nxx1B
(CE pin "H" active)
V
DD
V
OUT
V
DD
V
OUT
Vref
Current Limit
CE
GND
Vref
Current Limit
CE
GND
SELECTION GUIDE
Package
SOT-23-5
Quantity per Reel
3,000 pcs
Part No.
R1111N.xx.1.
∗
-TR-F
R1121N.xx.1.
∗
-TR-F
.xx.
: Specify the output voltage within the range 1.5V (.15.) to 5.0V (.50.)
in 0.1V steps.
.∗
: Select the polarity of the CE pin from (.A.) "L" active or (.B.) "H" active.
PACKAGE (Top View)
SOT-23-5
5
4
TYPICAL CHARACTERISTIC
R1111N301B
R1121N301B
0.40
0.35
Dropout Voltage V
DIF
(V)
Dropout Voltage vs. Output Current
85°C
25°C
-40°C
0.30
0.25
0.20
0.15
0.10
0.05
0
0
1
2
3
R1111N
1
2
3
4
5
V
DD
GND
CE
or CE
NC
V
OUT
R1121N
1
2
3
4
5
V
OUT
GND
V
DD
CE or CE
NC
50
100
Output Current I
OUT
(mA)
150
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
1. The products and the product specifications described in this document are subject to change or
discontinuation of production without notice for reasons such as improvement. Therefore, before
deciding to use the products, please refer to Ricoh sales representatives for the latest
information thereon.
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example application circuits for the products. The release of such information is not to be
construed as a warranty of or a grant of license under Ricoh's or any third party's intellectual
property rights or any other rights.
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components in standard applications (office equipment, telecommunication equipment,
measuring instruments, consumer electronic products, amusement equipment etc.). Those
customers intending to use a product in an application requiring extreme quality and reliability,
for example, in a highly specific application where the failure or misoperation of the product
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concerning the products or the technical information.
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