R1171x Series
2A/1.5A LDO
The R1171x Series are CMOS-based LDO regulators featuring 2A/1.5A output. The TO-252-5-P1 and the HSOP-6J that support high
wattage can provide the output current up to 2A and 1.5A, respectively. The CMOS process provides both high output current and low
supply current. The dropout voltage is significantly lower than bipolar regulators. The CE pin can switch the regulator into standby
mode. In addition to a fold-back protection circuit built into conventional LDO regulators, R1171x has a thermal shutdown circuit.
Ceramic capacitors can be used.
∗)
R1171S Series are suitable for automotive applications too. Please refer to our "Car Electronics Products Catalog" or contact us.
FEATURES
•
Supply Current (I
SS
) ··················· Typ. 130μA (V
IN
=V
SET
+1.0V)
•
Standby Current (I
standby
) ············ Typ. 0.1μA (Same as above, In standby)
•
Output Current (I
OUT
)·················· 2A (TO-252-5-P1), 1.5A (HSOP-6J)
•
Dropout Voltage (V
DIF
) ··············· Typ. 0.09V (I
OUT
=300mA, V
SET
=2.8V)
•
Ripple Rejection (RR)················ Typ. 50dB (f=1kHz)
•
Input Voltage Range (V
IN
) ·········· 2.1V to 6.0V
•
Output Voltage Range (V
OUT
)····· 1.5V to 5.0V (HSOP-6J, Internally fixed)
1.8V to 5.0V (TO-252-5-P1, 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. 200mA
•
Thermal Shutdown Circuit ··············Stops at 150°C
•
Packages ········································HSOP-6J, TO-252-5-P1
•
Ceramic capacitor s can be used. ·····C
IN
=C
OUT
=10μF or more (V
SET
<
1.8V)
C
IN
=C
OUT
=4.7μF or more (V
SET
≥
1.8V)
BLOCK DIAGRAMS
R1171xxx1A/C
(
CE
pin "L" active)
V
DD
V
OUT
V
DD
R1171xxx1B/D
(CE pin "H" active)
V
OUT
Vref
Current Limit
Thermal Shutdown
GND
Vref
Current Limit
Thermal Shutdown
GND
CE
GND
CE
GND
SELECTION GUIDES
Halogen Free
-
Package
HSOP-6J
TO-252-5-P1
Q'ty per Reel
Part No.
1,000 pcs R1171S.xx.1.
∗
-E2-FE
3,000 pcs R1171J.yy.1
.
$ -T1-F
.xx.
: Specify the output voltage within the range of 1.5V (.15.) to 5.0V (.50.)
in 0.1V steps.
.yy.
: Specify the output voltage within the range of 1.8V (.18.) to 5.0V (.50.)
in 0.1V steps.
.∗
: Select the polarity of the CE pin from (.A.) "L" active or (.B.) "H" active.
.$.
: Select the polarity of the CE pin from (.C.) "L" active or (.D.) "H" active.
PACKAGES (Top View)
HSOP-6J
6
5
4
TYPICAL CHARACTERISTIC
TO-252-5-P1
∗
R1171J301x
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
Dropout Voltage vs. Output Current
85
°
C
25
°
C
-40
°
C
1
2
3
1
2
3
4
5
1
2
3
4
5
6
V
OUT
GND
∗∗
CE
or CE
NC
GND
∗∗
V
DD
1
2
3
4
5
V
OUT
CE or CE
GND
∗∗
GND
∗∗
V
DD
Dropout Voltage V
DIF
(V)
0
250 500 750 1000 1250 1500 1750 2000
Output Current I
OUT
(mA)
∗
) The tab is substrate level (GND).
∗∗
) The GND pin must be wired together when it is mounted on board.
APPLICATIONS
•
Power source for hand-held communication equipment, cameras, and VCRs
•
Power source for home appliances and digital home appliances
•
Power source for automotive application
No.EK-125-121001
•
Power source for laptop personal computers
•
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.
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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