RP112x Series
Low Noise 150mA LDO
The RP112x Series are CMOS-based LDO regulators featuring 150mA output current. 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 (I
SS
) ······················ Typ. 75μA (V
IN
=V
SET
+1.0V)
•
Standby Current (I
standby
) ················· Typ. 0.1μA (Same as above, CE="L")
•
Dropout Voltage (V
DIF
) ···················· Typ. 0.20V (I
OUT
=150mA, V
SET
=2.8V)
•
Ripple Rejection (RR)····················· Typ. 80dB (f=1kHz), Typ. 65dB (f=100kHz)
•
Input Voltage Range (V
IN
) ··············· 2.0V to 5.25V
•
Output Voltage Range (V
OUT
)·········· 1.2V to 4.8V (Internally fixed)
•
Output Voltage Accuracy ················± 1%
•
Temp. coeff. of Output Voltage ······· Typ.
±
30ppm/°C
•
Line Regulation ······························ Typ. 0.02%/V
•
Output Noise (en)··························· Typ. 10μVrms
•
Fold-back Protection Circuit ··········· Current limit Typ. 40mA
•
Auto-discharge Function ················ D Version
•
Packages ······································· DFN(PLP)1010-4,
•
Ceramic Capacitor can be used. ···· 1μF or more
SC-88A, SOT-23-5
(The above shows specification at Topt=25
°
C. Design assurance value at -40
°
C
≤
Topt
≤
85
°
C is also available. For details, please refer to the datasheet.)
BLOCK DIAGRAMS
RP112xxxxB
(Without Auto-discharge function)
RP112xxxxD
(With Auto-discharge function)
V
DD
Noise
Reduction
Vref
Current
Limit
V
OUT
V
DD
Noise
Reduction
Vref
Current
Limit
V
OUT
CE
GND
CE
GND
SELECTION GUIDES
Halogen Free
Package
Q'ty per Reel
Part No.
DFN(PLP)1010-4 10,000 pcs RP112K.xx.1.
∗
-TR
SC-88A
3,000 pcs RP112Q.xx.2.
∗
-TR-FE
SOT-23-5
3,000 pcs RP112N.xx.1.
∗
-TR-FE
.xx.
: Specify the output voltage within the range of 1.2V (.12.) to 4.8V (.48.)
in 0.1V steps.
.∗
: Select from (.B.) without auto-discharge function or
(.D.) with auto-discharge function.
PACKAGES (Top View)
DFN(PLP)1010-4
4
3
TYPICAL CHARACTERISTIC
SOT-23-5
5
4
SC-88A
5
4
RP112x28xx
250
Dropout Voltage vs. Output Current
85°C
25°C
- 40°C
∗
Dropout Voltage V
DIF
(mV)
200
150
100
50
0
1
2
1
2
3
1
2
3
1
2
3
4
V
OUT
GND
CE
V
DD
1
2
3
4
5
V
DD
GND
CE
NC
V
OUT
1
2
3
4
5
V
DD
GND
CE
NC
V
OUT
∗
) The tab is substrate level (GND).
0
50
100
Output Current I
OUT
(mA)
150
APPLICATIONS
•
Power source for RF module that demands for higher level of noise reduction
•
Power source for the portable music player
No.EK-258-121001
CMOS LDO Regulator
RP112x Series
Low Noise 150mA LDO
Comparison ofLow Noise 150mA LDO
RP112x Series
Supply Current
Input Voltage Range
Output Voltage Range
Dropout Voltage
Ripple Rejection
（I
OUT
=30mA,f=1kHz）
Output Voltage Accuracy
Temp. coeff. of
Output Voltage
Output Noise
Typ. 75μA
2.0V to 5.25V
1.2V to 4.8V
Typ. 0.20V
Typ. 80dB
±1%
±30ppm/°C
Typ. 10μVrms
DFN(PLP)1010-4
(1.0mm × 1.0mm)
SC-88A
(2.0mm × 2.1mm)
SOT-23-5
(2.9mm × 2.8mm)
RP130x Series
Typ. 38μA
1.7V to 6.5V
1.2V to 5.3V
Typ. 0.32V
Typ. 80dB
±1%
±20ppm/°C
Typ. 30μVrms
DFN(PLP)1010-4
(1.0mm × 1.0mm)
SC-82AB
(2.0mm × 2.1mm)
SOT-23-5
(2.9mm × 2.8mm)
CMOS LDO Regulator
RP109x Series
Typ. 50μA
1.4V to 5.25V
0.8V to 3.6V
Typ. 0.25V
Typ. 75dB
±1%
±30ppm/°C (V
SET
≥1.8V)
20×V
OUT
μVrms
(V
SET
≥1.8V)
DFN(PLP)0808-4
(0.8mm × 0.8mm)
DFN1010-4
(1.0mm × 1.0mm)
SC-88A
(2.0mm × 2.1mm)
SOT-23-5
(2.9mm × 2.8mm)
Package
The High Ripple Rejection
The ripple rejection of RP112x Series is 80dB at f=1kHz under I
OUT
=30mA. The ripple rejection of conventional LDO's decline
rapidly according to frequency. However, the one of RP112x Series decline gradually and exceed the one of conventional LDOs, as
75dB at f=10kHz, 65dB even if it's f=100kHz. It can be realized that the one of RP112x Series is high level, compared to RP130x
Series that of the same 150mA output LDO as shown in the graphs below.
RP112x281x
100
90
80
70
60
50
40
30
20
10
0
0.1
1
10
100
Frequency f (kHz)
1000
1mA
30mA
150mA
V
IN
=3.8V
RP130x281x
100
90
80
70
60
50
40
30
20
10
0
0.1
V
IN
=3.8V
Ripple Rejection RR (dB)
Ripple Rejection RR (dB)
I
OUT
=1mA
I
OUT
=30mA
I
OUT
=150mA
1
10
100
Frequency f (kHz)
1000
The currently available information as of October 2012 is provided in this New Product News.
EK-258-121001
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