RP101x SERIES
LOW NOISE 300mA LDO REGULATOR
NO.EA-167-071015
OUTLINE
The RP101x Series are CMOS-based voltage regulator ICs with high output voltage accuracy, extremely low
supply current, low ON-resistance, and high ripple rejection. Each of these ICs consists of a voltage reference
unit, an error amplifier, resistor-net for voltage setting, a current limit circuit, and a chip enable circuit.
These ICs perform with low dropout voltage and a chip enable function. The line transient response and load
transient response of the RP101x Series are excellent, thus these ICs are very suitable for the power supply for
hand-held communication equipment.
The output voltage of these ICs is fixed with high accuracy. Since the packages for these ICs are SOT-23-5 and
DFN(PLP)1612-4 (t=0.6mm type) or DFN(PLP)1612-4B (t=0.4mm type), therefore high density mounting of the
ICs on boards is possible.
FEATURES
Supply Current .............................................................Typ. 18µA
Standby Current ...........................................................Typ. 0.1µA
Dropout Voltage............................................................Typ. 0.13V (I
OUT
=150mA,
V
OUT
=2.8V)
Ripple Rejection ...........................................................Typ. 75dB (f=1kHz)
Temperature-Drift Coefficient of Output Voltage ..........Typ.
±30ppm/°C
Line Regulation ............................................................Typ. 0.02%/V
Output Voltage Accuracy..............................................±0.8%
Packages......................................................................DFN(PLP)1612-4, DFN(PLP)1612-4B, SOT-23-5
Input Voltage Range.....................................................1.7V to 5.25V
Output Voltage..............................................................1.2V, 1.3V, 1.5V, 1.8V, 1.85V, 1.9V, 2.0V, 2.1V, 2.5V,
2.6V, 2.7V, 2.8V, 2.85V, 2.9V, 3.0V, 3.1V, 3.3V
•
Built-in Fold Back Protection Circuit.............................Typ. 40mA (Current at short mode)
•
Ceramic capacitors are recommended to be used with this IC .... 1.0µF or more
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APPLICATIONS
•
•
•
•
Power source for portable communication equipment.
Power source for electrical appliances such as cameras, VCRs and camcorders.
Power source for battery-powered equipment.
Power source for home appliances.
1
RP101x
BLOCK DIAGRAMS
RP101xxxxB
V
DD
V
OUT
V
DD
RP101xxxxD
V
OUT
Vref
Current Limit
Vref
Current Limit
CE
GND
CE
GND
SELECTION GUIDE
The output voltage, auto discharge function*, and the taping type for the ICs can be selected at the user’s
request.
The selection can be made with designating the part number as shown below;
RP101xxxxx-xx-x
←Part
Number
↑ ↑ ↑↑ ↑ ↑
a b a’ c d e
Code
a, a’
Contents
Designation of Package Type:
RP101Kxx1x-xx: DFN(PLP)1612-4 (t=0.6mm)
RP101Kxx2x-xx: DFN(PLP)1612-4B (t=0.4mm)
RP101Nxx1x-xx: SOT-23-5
Setting Output Voltage (V
OUT
):
The following 16 kinds of voltage are standard.
1.2V, 1.3V, 1.5V, 1.8V, 1.85V, 1.9V, 2.0V, 2.1V, 2.5V, 2.6V, 2.7V, 2.8V, 2.85V, 2.9V,
3.0V, 3.1V, 3.3V
Exceptions:1.85V=RP101x18xx5-xx-x, 2.85V=RP101x28xx5-xx-x
Designation of Mask Option
B: active high, without auto discharge function* at OFF state.
D: active high, with auto discharge function* at OFF state.
Designation of Taping Type:
Ex. TR (Refer to Taping Specifications; TR type is the standard direction.)
Designation of composition of pin plating:
-F: Lead free plating (SOT-23-5)
None: Au plating (DFN(PLP)1612-4, DFN(PLP)1612-4B)
b
c
d
e
*) When the mode is into standby with CE signal, auto discharge transistor turns on, and it makes the turn-off
speed faster than normal type.
2
RP101x
PIN CONFIGURATIONS
•
SOT-23-5
5
4
4
•
DFN(PLP)1612-4, DFN(PLP)1612-4B
Top View
3
Bottom View
3
4
(mark side)
1
2
3
1
2
2
1
PIN DESCRIPTIONS
•
SOT-23-5
Pin No.
1
2
3
4
5
Symbol
V
DD
GND
CE
NC
V
OUT
Description
Input Pin
Ground Pin
Chip Enable Pin
("H" Active)
No Connection
Output Pin
•
DFN(PLP)1612-4, DFN(PLP)1612-4B
Pin No.
1
2
3
4
Symbol
V
OUT
GND
CE
V
DD
Description
Output Pin
Ground Pin
Chip Enable Pin
("H" Active)
Input Pin
∗)
Tab in the
parts have GND level.
(They are connected to the back side of this IC.)
Do not connect to other wires or land patterns.
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 (SOT-23-5) *
Power Dissipation (DFN(PLP)1612-4) *
Power Dissipation (DFN(PLP)1612-4B) *
T
opt
T
stg
Operating Temperature Range
Storage Temperature Range
Item
Rating
6.0
6.0
−0.3
to V
IN
+0.3
310
420
610
580
−40
to 85
−55
to 125
°C
°C
mW
Unit
V
V
V
mA
*) For Power Dissipation, please refer to PACKAGE INFORMATION to be described.
ABSOLUTE MAXIMUM RATINGS
Absolute Maximum ratings are threshold limit values that must not be exceeded ever for an instant under
any conditions. Moreover, such values for any two items must not be reached simultaneously. Operation
above these absolute maximum ratings may cause degradation or permanent damage to the device.
These are stress ratings only and do not necessarily imply functional operation below these limits.
3
RP101x
ELECTRICAL CHARACTERISTICS
•
RP101xxxxB/D
V
IN
=Set
V
OUT
+1V,
I
OUT
=1mA,
C
IN
=C
OUT
=1µF,
unless otherwise noted.
Topt=25°C
Symbol
V
OUT
I
OUT
∆V
OUT
/
∆I
OUT
Item
Output Voltage
Output Current
Load Regulation
1mA
<
=
Conditions
V
IN
=Set
V
OUT
+1V
I
OUT
=1mA
V
OUT
> 2.0V
V
OUT
<
=
Min.
×0.992
−16
300
2.0V
Typ.
Max.
×1.008
+16
Unit
V
mV
mA
I
OUT
<
=
150mA
1.2V
1.5V
<
=
<
=
<
=
<
=
<
=
<
=
20
V
OUT
< 1.5V
V
OUT
< 1.7V
V
OUT
< 2.0V
V
OUT
< 2.5V
V
OUT
< 2.8V
V
OUT
<
=
40
0.50
0.38
0.34
0.30
0.25
0.23
25
2.0
0.10
mV
0.40
0.24
0.21
0.17
0.14
0.13
18
0.1
V
DIF
Dropout Voltage
I
OUT
=150mA
1.7V
2.0V
2.5V
2.8V
V
3.3V
I
SS
I
standby
∆V
OUT
/
∆V
IN
RR
V
IN
∆V
OUT
/
∆T
opt
I
lim
I
PD
V
CEH
V
CEL
en
R
LOW
Supply Current
Standby Current
Line Regulation
Ripple Rejection
Input Voltage*
1
Output Voltage
Temperature Coefficient
Short Current Limit
CE Pull-down Current
CE Input Voltage "H"
CE Input Voltage "L"
Output Noise
Low Output Nch Tr.
ON Resistance
(of D version)
I
OUT
=0mA
V
CE
=0V
Set V
OUT
+0.5V
<
=
µA
µA
%/V
dB
V
IN
<
=
5.0V
0.02
75
1.7
f=1kHz, Ripple 0.2Vp-p
V
IN
=Set
V
OUT
+1V,
I
OUT
=30mA
(In case that V
OUT
<
2.0V, V
IN
=3.0V)
=
5.25
±30
40
0.3
V
ppm
/°C
mA
µA
V
−40°C
<
=
T
opt
<
=
85°C
V
OUT
=0V
1.1
0.3
BW=10Hz to 100kHz
I
OUT
=30mA
V
IN
=4.0V
V
CE
=0V
30
30
V
µVrms
Ω
*1) Max. Input Voltage is 5.5V during 500hours.
4
RP101x
TYPICAL APPLICATION
V
DD
C1
V
OUT
C2
V
OUT
RP101x
Series
CE
GND
(External Components)
C2 1.0µF MURATA: GRM155B31A105KE15
TECHNICAL NOTES
When using these ICs, consider the following points:
Phase Compensation
In these ICs, phase compensation is made for securing stable operation even if the load current is varied. For
this purpose, use a capacitor C2 with 1.0µF or more capacity.
Ceramic capacitors have different temperature characteristics and bias characteristics depending on their
dimensions and manufacturers. If the setting voltage is 2.5V or more and the capacitor’s dimensions for V
OUT
equal to 1.0mm by 0.5mm or smaller than that, the capacitance value might be extremely low. As a result, the
capacitance might be much less than expected. In such cases, the operation might be unstable at low
temperature. (-20°C or less) In that case, use a larger capacity, or a large dimensions’ capacitor. (For example
1.6mm by 0.8mm)
If a tantalum capacitor is selected as an output capacitor, large ESR may be a cause of unstable operation.
Evaluate the operation of PCB with considerable frequency characteristics.
PCB Layout
Make V
DD
and GND lines sufficient. If their impedance is high, noise pickup or unstable operation may result.
Connect a capacitor C1 with a capacitance value as much as 1.0µF or more between V
DD
and GND pin, and as
close as possible to the pins.
Set external components, especially the output capacitor C2, as close as possible to the ICs, and make wiring
as short as possible.
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