R1112N/R1122N Series
Low Noise 150mA LDO
The R1112N/R1122N Series are CMOS-based LDO regulators featuring 150mA output. High ripple rejection and excellent load
transient response of the series make the product ideally suited for use in power source for hand-held communication equipment.
The polarity of the CE pin can be selected. Two different pin layout as R1112N and R1122N are available. Ceramic capacitors can be
used.
FEATURES
•
Supply Current (I
SS
) ························Typ. 100μA (V
IN
=SET V
OUT
+1V)
•
Standby Current (I
standby
) ·················Typ. 0.1μA (Same as above, in standby)
•
Dropout Voltage (V
DIF
) ····················Typ. 0.19V (I
OUT
=100mA, V
OUT
=2.8V)
•
Ripple Rejection (RR)·····················Typ. 80dB (f=1kHz)
•
Input Voltage Range (V
IN
) ···············2.0V to 6.0V
•
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. 30mA
•
Package··············································· SOT-23-5
•
Replaceable with LP2980 or LP2985. (R1112N)
•
Replaceable with TK111, TK112 or TK113. (R1122N)
•
Ceramic capacitors can be used. ········ 2.2μF or more
BLOCK DIAGRAMS
R1112Nxx1A
R1122Nxx1A
(
CE
pin "L" active)
R1112Nxx1B
R1122Nxx1B
(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.
R1112N.xx.1.
∗
-TR-F
R1122N.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
R1112N301B
R1122N301B
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0
Dropout Voltage vs. Output Current
85°C
25°C
-40°C
1
2
3
R1112N
1
2
3
4
5
V
DD
GND
CE
or CE
NC
V
OUT
R1122N
1
2
3
4
5
V
OUT
GND
V
DD
CE or CE
NC
Dropout Voltage V
DIF
(V)
0
50
100
Output Current I
OUT
(mA)
150
APPLICATIONS
•
Power source for hand-held communication equipment, cameras, and VCRs
•
Power source for home appliances
No.EK-060-091101
•
Power source for battery-powered equipment
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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described herein.
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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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