RP112x SERIES
Low Noise 150mA LDO REGULATOR
NO.EA-258-131024
OUTLINE
The RP112x Series are CMOS-based voltage regulator (LDO) ICs, which have been developed using the
CMOS process technology, with high output voltage accuracy, low-supply current, low On-resistance transistor,
low noise output voltage and high ripple rejection. Each of the ICs is composed of the followings: a voltage
reference unit, an error amplifier, a resistor-net for output voltage setting, a current limit circuit, and a chip enable
circuit.
The RP112x features ultra low noise and its Ripple Rejection is as low as 80dB at f=1kHz, 75dB at f=10kHz
and 65dB at f=100kHz. The Output Noise is also as low as Typ. 10μVrms. It is kept the low level at any Output
Voltage. RP112x is suitable for the power source for the portable music player and RF module that demands for
higher level of noise reduction. SOT-23-5 and SC-88A packages, a 1mm square DFN(PLP)1010-4 package are
available.
FEATURES
•
•
•
•
Supply Current ......................................................Typ. 75μA
Standby Current ....................................................Typ. 0.1μA
Dropout Voltage ....................................................Typ. 0.20V (I
OUT
=150mA,
V
OUT
=2.8V)
Ripple Rejection....................................................Typ. 80dB (f=1kHz)
Typ. 75dB (f=10kHz)
Typ. 65dB (f=100kHz)
Output Voltage Accuracy.......................................±1.0%
Output Voltage Temperature Coefficient ...............Typ.
±30ppm/°C
Line Regulation .....................................................Typ. 0.02%/V
Packages ..............................................................DFN(PLP)1010-4, SC-88A, SOT-23-5
Input Voltage Range .............................................2.0V to 5.25V
Output Voltage Range...........................................1.2V to 4.8V (0.1V steps)
(
For other voltages, please refer to MARK INFORMATIONS.)
Short Current Limit................................................Typ. 40mA
Built-in Foldback Protection Circuit
Output Noise .........................................................Typ. 10μVrms
Ceramic capacitors are recommended to be used with this IC .....1.0μF or more
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APPLICATIONS
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•
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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.
Power source for the portable music player
Power source for RF module
1
RP112x
NO.EA-258-131024
BLOCK DIAGRAMS
RP112xxxxB
V
DD
V
OUT
V
DD
RP112xxxxD
V
OUT
Noise
Reduction
Noise
Reduction
Vref
Current
Limit
Vref
Current
Limit
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
RP112Kxx1∗-TR
RP112Qxx2∗-TR-FE
RP112Nxx1∗-TR-FE
Package
DFN(PLP)1010-4
SC-88A
SOT-23-5
Quantity per Reel
10,000 pcs
3,000 pcs
3,000 pcs
Pb Free
Yes
Yes
Yes
Halogen Free
Yes
Yes
Yes
xx: Output voltage (V
OUT
) is selectable from 1.2V to 4.8V in 0.1V steps.
The second decimal point of the voltage is described as below.
1.25V: RP112x12x∗5
1.85V: RP112x18x∗5
2.85V: RP112x28x∗5
∗:
Selections of CE pin polarity and Auto-discharge function are as shown below:
(B) CE pin polarity: “H” active, Auto-discharge function: No
(D) CE pin polarity: “H” active, Auto-discharge function: Yes
2
RP112x
NO.EA-258-131024
ABSOLUTE MAXIMUM RATINGS
Symbol
V
IN
V
CE
V
OUT
I
OUT
P
D
Input Voltage
Input Voltage (CE Pin)
Output Voltage
Output Current
Power Dissipation (DFN(PLP)1010-4)
Power Dissipation (SC-88A)
∗
∗
∗
Item
Rating
6.0
6.0
−0.3
to V
IN
+
0.3
180
400
380
420
−40
to 85
−55
to 125
Unit
V
V
V
mA
mW
°C
°C
Power Dissipation (SOT-23-5)
T
opt
T
stg
Storage Temperature Range
Operating Temperature Range
∗)
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.
4
RP112x
NO.EA-258-131024
ELECTRICAL CHARACTERISTICS
Unless otherwise noted, V
IN
=5.25V（V
OUT
≥
4.1V）, V
IN
=Set
V
OUT
+1.0V（1.5V
< V
OUT
< 4.1V),
V
IN
=2.5V（V
OUT
≤
1.5V), I
OUT
=1mA,
C
IN
=C
OUT
=1.0μF.
The specifications surrounded by
are guaranteed by Design Engineering at - 40°C
≤
Ta
≤85°C.
•
RP112xxxxB/D
Symbol
Item
T
a
=25°C
V
OUT
Output Voltage
−40°C ≤
T
a
≤
85°C
I
OUT
Output Current
Load Regulation
Dropout Voltage
Supply Current
Standby Current
I
OUT
=0mA
V
CE
=0V
Set V
OUT
+0.3
≤
V
IN
≤
5.25V
ΔV
OUT
/ΔV
IN
Line Regulation
V
OUT
≥
4.1V
0.02
0.10
1mA
≤
I
OUT
≤
150mA
V
OUT
≥
4.1V
V
OUT
< 4.1V
Conditions
V
OUT
≥
2.0V
V
OUT
< 2.0V
V
OUT
≥
2.0V
V
OUT
< 2.0V
Min.
×0.99
−20
×0.985
−30
150
-14
0
80
75
0.1
14
Please refer to “Dropout Voltage”.
100
1.0
Typ.
Max.
×1.01
+20
×1.015
+30
Ta=25°C
Unit
V
mV
V
mV
mA
mV
ΔV
OUT
/ΔI
OUT
V
DIF
I
SS
I
standby
μA
μA
Set V
OUT
+0.5V
≤
1.7V
≤
V
OUT
≤
4.1V
V
IN
≤
5.0V
2.2V
≤
V
IN
≤
5.0V V
OUT
< 1.7V
Ripple 0.2Vp-p,
I
OUT
=30mA,
V
IN
=5.25V
(V
OUT
≥
4.1V),
V
IN
=Set
V
OUT
+1.0V
(V
OUT
< 4.1V)
f
=1kHz
f
=10kHz
f
=100kHz
2.0
%/V
80
75
65
5.25
±30
40
0.3
1.0
0.4
0.6
V
ppm
/°C
mA
μA
V
V
μVrms
Ω
dB
RR
Ripple Rejection
V
IN
ΔV
OUT
/ΔT
opt
I
SC
I
PD
V
CEH
V
CEL
en
R
LOW
Input Voltage
∗
Output Voltage
−40°C ≤
T
a
≤
85°C
Temperature Coefficient
Short Current Limit
CE Pull-down Current
CE Input Voltage "H"
CE Input Voltage "L"
Output Noise
Auto-discharge Nch Tr.
ON Resistance
(D version)
BW=10Hz~100kHz,
I
OUT
=30mA
V
IN
=4.0V,
V
CE
=0V
V
OUT
=0V
10
60
All test categories were tested on the products under the pulse load condition (Tj≈Ta=25ºC) except Output
Noise, Ripple Rejection, and Output Voltage Temperature Coefficient.
*1) The maximum input voltage (Electrical Characteristics) is 5.25V. If, for any reason the maximum input voltage
exceeds 5.25V, it has to be no more than 5.5V with 500hrs of the total operating time.
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MCU
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