R1111N/R1121N Series
150mA 8V Input LDO
The R1111N/R1121N Series are CMOS-based LDO regulators featuring 150mA output. (Under 1.5V
≤
V
SET
≤
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
=V
SET
+1.0V)
•
Standby Current (I
standby
) ················· Typ. 0.1μA (Same as above, In standby)
•
Dropout Voltage (V
DIF
) ···················· Typ. 0.2V (I
OUT
=100mA, V
SET
=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 GUIDES
Halogen Free
Package
SOT-23-5
Part No.
R1111N.xx.1.
∗
-TR-FE
3,000 pcs
R1121N.xx.1.
∗
-TR-FE
Q'ty per Reel
.xx.
: Specify the output voltage within the range of 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
Dropout Voltage V
DIF
(V)
Dropout Voltage vs. Output Current
85°C
25°C
-40°C
0.35
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-057-121001
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.
2. The materials in this document may not be copied or otherwise reproduced in whole or in part
without prior written consent of Ricoh.
3. Please be sure to take any necessary formalities under relevant laws or regulations before
exporting or otherwise taking out of your country the products or the technical information
described herein.
4. The technical information described in this document shows typical characteristics of and
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.
5. The products listed in this document are intended and designed for use as general electronic
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
could result in human injury or death (aircraft, spacevehicle, nuclear reactor control system,
traffic control system, automotive and transportation equipment, combustion equipment, safety
devices, life support system etc.) should first contact us.
6. We are making our continuous effort to improve the quality and reliability of our products, but
semiconductor products are likely to fail with certain probability. In order to prevent any injury to
persons or damages to property resulting from such failure, customers should be careful enough
to incorporate safety measures in their design, such as redundancy feature, firecontainment
feature and fail-safe feature. We do not assume any liability or responsibility for any loss or
damage arising from misuse or inappropriate use of the products.
7. Anti-radiation design is not implemented in the products described in this document.
8. Please contact Ricoh sales representatives should you have any questions or comments
concerning the products or the technical information.
Halogen Free
For the conservation of the global environment, Ricoh is advancing the decrease of the negative environmental impact material.
After Apr. 1, 2006, we will ship out the lead free products only. Thus, all products that will be shipped from now on comply with RoHS Directive.
Basically after Apr. 1, 2012, we will ship out the Power Management ICs of the Halogen Free products only. (Ricoh Halogen Free products are
also Antimony Free.)
RICOH COMPANY, LTD.
Electronic Devices Company
http://www.ricoh.com/LSI/
RICOH COMPANY, LTD.
Electronic Devices Company
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