RP111x Series
Good Transient Response Low Voltage 500mA LDO
NO.EA-241-150204
OUTLINE
The RP111x Series are CMOS-based LDO regulators featuring 500mA output current. The input voltage is as
low as 1.4V and the output voltage can be set from 0.7V. Due to a built-in 0.46Ω (at V
OUT
=2.8V) on-resistor, RP111x
can provide a low dropout voltage. RP111x also features an excellent line transient response, ripple rejection at
75dB, and low noise. The output voltage accuracy is as high as ±0.8% and the temperature drift coefficient of
output voltage is low at ±30ppm/C. The accuracy of the output voltage of RP111x includes the temperature
characteristics and the load transient response has been improved. The typ. and max value of under/overshoot
for various output current are shown in the typical characteristics in the datasheet, therefore the accuracy of the
output voltage estimation will be easy on the actual operating cases.
In addition to a fold-back protection circuit built into conventional regulators, RP111x contains a thermal
shutdown circuit and an inrush current limit circuit. SOT-23-5 and SOT-89-5 packages, a 1.2mm square
DFN1212-6 package are available.
FEATURES
Supply Current ...................................................... Typ. 80A
Standby Current .................................................... Typ. 0.1A
Dropout Voltage .................................................... Typ. 0.23V (I
OUT
½500mA,
V
OUT
½2.5V)
Ripple Rejection .................................................... Typ. 75dB (f½1kHz)
Typ. 70dB (f½10kHz)
Output Voltage Accuracy.......................................
0.8%
(V
OUT
≥1.8V)
Output Voltage Temperature Coefficient ............... Typ.
30ppm/C
(V
OUT
≥1.8V)
Line Regulation ..................................................... Typ. 0.02%/V
Packages .............................................................. DFN1212-6, SOT-23-5, SOT-89-5,
Input Voltage Range ............................................. 1.4V to 5.25V
Output Voltage Range........................................... 0.7V to 3.6V (0.1V steps)
(
For other voltages, please refer to MARK INFORMATIONS.)
Built-in Foldback Protection Circuit ....................... Typ. 50mA (Current at short mode)
Thermal Shutdown Temperature........................... 165C
Inrush Current Limit .............................................. Typ.400mA (for 180s after start-up)
Ceramic capacitors are recommended to be used with this IC ..... 1.0F or more
APPLICATIONS
Power source for portable communication equipment.
Power source for electrical appliances such as cameras, VCRs and camcorders.
Power source for battery-powered equipments.
Power source for electrical home appliances.
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RP111x
NO.EA-241-150204
BLOCK DIAGRAMS
RP111xxx1B
V
DD
V
OUT
V
DD
V
FB
RP111xxx1D
V
OUT
V
FB
Vref
Current Limit
Thermal Shutdown
Vref
Current Limit
Thermal Shutdown
CE
GND CE
GND
SELECTION GUIDE
The output voltage, auto discharge function, package for the ICs can be selected at the user’s request.
Product Name
RP111Lxx1-TR
RP111Nxx1-TR-FE
RP111Hxx1-T1-FE
Package
DFN1212-6
SOT-23-5
SOT-89-5
Quantity per Reel
5,000 pcs
3,000 pcs
1,000 pcs
Pb Free
Yes
Yes
Yes
Halogen Free
Yes
Yes
Yes
xx x: The output voltage can be designated in the range of 0.7V（07）to 3.6V（36）in 0.1V steps.
(For other voltages, please refer to MARK INFORMATIONS.)
: Auto discharge function at off state are options as follows.
(B) without auto discharge function at off state
(D) with auto discharge function at off state
2
RP111x
NO.EA-241-150204
PIN CONFIGURATIONS
DFN1212-6
Top View
6
5
4
SOT-23-5
5
4
5
6
SOT-89-5
5
4
Bottom View
4
(mark side)
1
2
3
3
2
1
1
2
3
1
2
3
PIN DESCRIPTIONS
DFN1212-6
Pin No.
1
2
3
4
5
6
Symbol
V
OUT
V
FB
GND
CE
NC
V
DD
Output Pin
Feed Back Pin
Ground Pin
Description
Chip Enable Pin ("H" Active)
No connection
Input Pin
)
Tab is GND level. (They are connected to the reverse side of this IC.)
The tab is better to be connected to the GND, but leaving it open is also acceptable.
SOT-23-5
Pin No
1
2
3
4
5
Symbol
V
DD
GND
CE
V
FB
V
OUT
Input Pin
Ground Pin
Chip Enable Pin ("H" Active)
Feed Back Pin
Output Pin
Pin Description
SOT-89-5
Pin No
1
2
3
4
5
Symbol
V
FB
GND
CE
V
DD
V
OUT
Feed Back Pin
Ground Pin
Chip Enable Pin ("H" Active)
Input Pin
Output Pin
Pin Description
Under normal conditions, please connect the V
OUT
pin to the V
FB
pin. However, in the case of using the
Adjustable Output Voltage Type, please follow the " Notes on the Adjustable Output Voltage Type Settings".
3
RP111x
NO.EA-241-150204
ABSOLUTE MAXIMUM RATINGS
Symbol
V
IN
V
CE
V
OUT
I
OUT
P
D
T
opt
T
stg
Input Voltage
Input Voltage (CE Pin)
Output Voltage
Output Current
Power Dissipation (DFN1212-6)
Power Dissipation (SOT-23-5)
Power Dissipation (SOT-89-5)
Operating Temperature Range
Storage Temperature Range
Item
Rating
6.0
-0.3½6.0
0.3
to V
IN
0.3
510
600
420
900
40
to 85
55
to 125
C
C
mW
Unit
V
V
V
mA
)
For Power Dissipation, please refer to PACKAGE INFORMATION.
ABSOLUTE MAXIMUM RATINGS
Electronic and mechanical stress momentarily exceeded absolute maximum ratings may cause the
permanent damages and may degrade the life time and safety for both device and system using the device
in the field. The functional operation at or over these absolute maximum ratings is not assured.
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Microchip MCU
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