RP112x Series
Low Noise 150 mA LDO Regulator
No. EA-258-180301
OUTLINE
The RP112x is a voltage regulator (LDO) with high output voltage accuracy, low-supply current, low On-
resistance transistor, low noise output voltage and high ripple rejection. Each IC 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 80 dB at f = 1 kHz, 75 dB at f = 10
kHz and 65 dB at f = 100 kHz. The Output Noise is also as low as Typ. 10
μVrms.
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 1-mm square DFN(PLP)1010-
4 package are available.
FEATURES
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Supply Current ...................................................... Typ. 75
µA
Standby Current .................................................... Typ. 0.1
µA
Dropout Voltage .................................................... Typ. 0.20 V (I
OUT
= 150 mA, V
OUT
= 2.8 V)
Ripple Rejection .................................................... Typ. 80 dB (f = 1 kHz)
Typ. 75 dB (f = 10 kHz)
Typ. 65 dB (f = 100 kHz)
Output Voltage Accuracy....................................... ±1.0%
Output Voltage Temperature Coefficient ............... Typ. ±30 ppm/°C
Line Regulation ..................................................... Typ. 0.02%/V
Packages .............................................................. DFN(PLP)1010-4, SC-88A, SOT-23-5
Input Voltage Range ............................................. 2.0 V to 5.25 V
Output Voltage Range ........................................... 1.2 V to 4.8 V (0.1 V step)
Short Current Limit ................................................ Typ. 40 mA
Built-in Foldback Protection Circuit
Output Noise ......................................................... Typ. 10
μVrms
Ceramic capacitors are recommended to be used with this IC ..... 1.0
µF
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.
Power source for the portable music player
Power source for RF module
1
RP112x
No. EA-258-180301
SELECTION GUIDE
The output voltage, auto-discharge function
(1)
, package for the ICs can be selected at the user’s request.
Selection Guide
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: Set output voltage (V
SET
) is selectable from 1.2 V to 4.8 V in 0.1 V step.
The second decimal point of the voltage is described as below.
1.25 V: RP112x12x∗5
1.85 V: RP112x18x∗5
2.85 V: 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
BLOCK DIAGRAMS
V
DD
V
OUT
V
DD
V
OUT
Noise
Reduction
Noise
Reduction
Vref
Current
Limit
Vref
Current
Limit
CE
GND
CE
GND
RP112xxxxB Block Diagram
RP112xxxxD Block Diagram
(1)
Auto-discharge function quickly lowers the output voltage to 0 V by releasing the electrical charge in the external
capacitor when the chip enable signal is switched from the active mode to the standby mode.
2
RP112x
No. EA-258-180301
PIN DESCRIPTIONS
Top View
4
3
Bottom View
3
(1)
4
5
4
5
4
(mark side)
(mark side)
1
2
2
1
1
1
2
3
1
2
3
DFN(PLP)1010-4 Pin Configuration
SC-88A Pin Configuration
SOT-23-5 Pin Configuration
DFN(PLP)1010-4 Pin Description
Pin No.
Symbol
1
2
3
4
SC-88A Pin Description
Pin No
1
2
3
4
5
V
OUT
GND
CE
V
DD
Output Pin
Ground Pin
Description
Chip Enable Pin ("H" Active)
Input Pin
Symbol
V
DD
GND
CE
NC
V
OUT
Input Pin
Ground Pin
Pin Description
Chip Enable Pin ("H" Active)
No Connection
Output Pin
SOT-23-5 Pin Description
Pin No
Symbol
1
2
3
4
5
V
DD
GND
CE
NC
V
OUT
Input Pin
Ground Pin
Pin Description
Chip Enable Pin ("H" Active)
No Connection
Output Pin
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.
(1)
Tab
3
RP112x
No. EA-258-180301
ABSOLUTE MAXIMUM RATINGS
Absolute Maximum Ratings
Symbol
V
IN
V
CE
V
OUT
I
OUT
Input Voltage
Input Voltage (CE Pin)
Output Voltage
Output Current
(DFN(PLP)1010-4)
P
D
Power Dissipation
(1)
SC-88A
SOT-23-5
Tj
Tstg
Junction Temperature Range
Storage Temperature Range
JEDEC STD. 51-7
Test Land Pattern
Standard
Test Land Pattern
JEDEC STD. 51-7
Test Land Pattern
Item
Rating
6.0
6.0
−0.3
to V
IN
+ 0.3
180
800
380
660
−40
to 125
−55
to 125
C
°C
mW
Unit
V
V
V
mA
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.
RECOMMENDED OPERATING CONDITIONS
Recommended Operating Conditions
Symbol
Item
V
IN
Ta
Input Voltage
Operating Temperature
Rating
2.0 to 5.25
−40
to 85
Unit
V
°C
RECOMMENDED OPERATING CONDITIONS
All of electronic equipment should be designed that the mounted semiconductor devices operate within the
recommended operating conditions. The semiconductor devices cannot operate normally over the recommended
operating conditions, even if when they are used over such conditions by momentary electronic noise or surge. And
the semiconductor devices may receive serious damage when they continue to operate over the recommended
operating conditions.
(1)
Refer to
POWEWR DISSIPATION
for detailed information.
4
RP112x
No. EA-258-180301
ELECTRICAL CHARACTERISTICS
Unless otherwise noted, V
IN
= 5.25 V (V
OUT
≥
4.1 V), VIN = Set V
OUT
+ 1.0 V (1.5 V < V
OUT
< 4.1 V),
V
IN
= 2.5 V (V
OUT
≤
1.5 V), I
OUT
= 1 mA, C
IN
= C
OUT
= 1.0
µF
The specifications surrounded by
are guaranteed by design engineering at
−40°C ≤ Ta ≤ 85°C.
RP112xxxxB/D Electrical Characteristics
Symbol
Item
Ta = 25°C
V
OUT
Output Voltage
−40°C ≤
Ta
≤
85°C
I
OUT
Output Current
1 mA
≤
I
OUT
≤
150 mA
V
OUT
≥
4.1 V
V
OUT
< 4.1 V
(Ta = 25°C)
Conditions
V
OUT
≥
2.0 V
V
OUT
< 2.0 V
V
OUT
≥
2.0 V
V
OUT
< 2.0 V
Min.
x0.99
−20
x0.985
−30
150
−14
Typ.
Max.
x1.01
+20
x1.015
+30
Unit
V
mV
V
mV
mA
∆V
OUT
/∆I
OUT
Load Regulation
V
DIF
I
SS
Istandby
Dropout Voltage
Supply Current
Standby Current
0
14
mV
Refer to
Product-specific Electrical Characteristics
I
OUT
= 0 mA
V
CE
= 0 V
Set V
OUT
+ 0.3 V
≤
V
IN
V
OUT
≥
4.1 V
≤
5.25 V
Set V
OUT
+ 0.5 V
≤
V
IN
1.7 V
≤
V
OUT
≤
5.0 V
< 4.1 V
2.2 V
≤
V
IN
≤
5.0 V
V
OUT
< 1.7 V
80
75
65
2.0
±30
40
0.3
1.0
0.4
0.6
5.25
V
ppm
/°C
mA
µA
V
V
dB
Ripple 0.2 Vp-p,
f = 1 kHz
I
OUT
= 30 mA,
V
IN
= 5.25 V
f = 10 kHz
(V
OUT
≥
4.1 V),
V
IN
= Set V
OUT
+ 1.0 V
f = 100 kHz
(V
OUT
< 4.1 V)
80
75
0.1
100
1.0
µA
µA
∆V
OUT
/∆V
IN
Line Regulation
0.02
0.10
%/V
RR
Ripple Rejection
V
IN
Input Voltage
(1)
Output Voltage
∆V
OUT
/∆Ta Temperature Coefficient
−40°C ≤
Ta
≤
85°C
I
SC
I
PD
V
CEH
V
CEL
Short Current Limit
CE Pull-down Current
CE Input Voltage "H"
CE Input Voltage "L"
V
OUT
= 0 V
All test categories were tested on the products under the pulse load condition (Tj
≈
Ta = 25°C) except Output Noise, Ripple
Rejection, and Output Voltage Temperature Coefficient.
The maximum input voltage (Electrical Characteristics) is 5.25 V. If, for any reason the maximum input voltage exceeds
5.25 V, it has to be no more than 5.5 V with 500 hrs of the total operating time.
(1)
5
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