RP100 SERIES
LOW NOISE 200mA LDO REGULATOR
Preliminary
NO.EA-
Rev. 0.04
1
OUTLINE
The RP100 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 RP100 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 PLP
therefore high density mounting of the ICs on boards is possible.
FEATURES
Low Supply Current...................................................................... Typ. 18A
Standby Mode .............................................................................. Typ. 0.1A
Low Dropout Voltage .................................................................... Typ. 0.14V (I
OUT
=150mA 2.5V Output type)
High Ripple Rejection................................................................... Typ. 75dB (f=1kHz 2.5V Output type)
Low Temperature-Drift Coefficient of Output Voltage
Typ.
30ppm/C
Excellent Line Regulation............................................................. Typ. 0.02%/V
High Output Voltage Accuracy...................................................... 1.0%
Small Packages............................................................................ PLP1612-4, SOT-23-5
Output Voltage.............................................................................. 1.2V, 1.5V, 1.8V, 1.85V, 1.9V, 2.0V, 2.5V,
2.6V, 2.7V, 2.8V, 2.85V, 2.9V, 3.0V, 3.3V
Built-in Fold Back Protection Circuit............................................. Typ. 40mA (Current at short mode)
Ceramic capacitors are recommended to be used with this IC
....
C
IN
=C
OUT
=1F 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 equipment.
RP100
Rev 0.04
2
BLOCK DIAGRAMS
RP100xxx1B RP100xxx1D
SELECTION GUIDE
The output voltage, version, 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;
RP100xxx1x-xx
Part Number
a b c d
Code Contents
a
Designation of Package Type:
K: PLP1612-4
N: SOT-23-5
b
Setting Output Voltage (V
OUT
):
1.2V, 1.5V, 1.8V, 1.85V, 1.9V, 2.0V, 2.5V, 2.6V, 2.7V, 2.8V, 2.85V, 2.9V,
3.0V, 3.3V
c
Designation of Active Type:
B: active high type
D: active high, with auto discharge
d
Designation of Taping Type:
Ex. TR (refer to Taping Specifications; TR type is the standard direction.)
Vref
Current Limit
+
-
GND
V
DD
V
DD
Vref
Current Limit
+
-
GND
V
OUT
V
OUT
CE
CE
RP100
Rev. 0.04
3
PIN CONFIGURATION
z PLP1612-4
z SOT-23-5
4
3
1
2
TOP VIEW
V
OUT
V
DD
CE
GND
V
DD
CE
V
OUT
GND
NC
1
5
3
2
4
MARK SIDE
RP100
Rev 0.04
4
PIN DESCRIPTIONS
RP100K
Pin No.
Symbol
Description
1 V
OUT
Output Pin
2 GND
Ground
Pin
3 CE
Chip
Enable
Pin
4 V
DD
Input
Pin
RP100N
Pin No.
Symbol
Description
1 V
DD
Input
Pin
2 GND
Ground
Pin
3 CE
Chip
Enable
Pin
4 NC
No
Connection
5 V
OUT
Output
Pin
ABSOLUTE MAXIMUM RATINGS
Symbol Item
Rating Unit
V
IN
Input
Voltage
6.0
V
V
CE
Input Voltage (CE Pin)
6.0 V
V
OUT
Output
Voltage
-0.3~V
IN
+0.3
V
I
OUT
Output
Current
300
mA
P
D
Power Dissipation *Note1
250
mW
Topt
Operating Temperature Range
-40~85
C
Tstg
Storage Temperature Range
-55~125
C
Note1: This value is under evaluation.
Mounted on board. Conditions: Board material FR4, Board dimensions 40*40*1.6(mm)
Metal rate: 50%(2-layer) without thermal via holes, wind velocity=0m/s
RP100
Rev. 0.04
5
ELECTRICAL CHARACTERISTICS
RP100xxx
V
IN
= Set V
OUT
+ 1V, I
OUT
=1mA, CIN=COUT=1F, unless otherwise noted.
Topt
=25C
Symbol Item
Conditions
Min.
Typ.
Max.
Unit
V
OUT
Output
Voltage
(*1)
V
OUT
0.99
(-20mV)
V
OUT
1.01
(20mV)
V
I
OUT
Output
Current
200 mA
V
OUT
/
I
OUT
Load Regulation
1mA
<
=
I
OUT
<
=
150mA
20
40
mV
1.2V
<
=
SET
V
OUT
<
1.5V
400 500 mV
1.5V
<
=
SET
V
OUT
<
1.7V
240 380
1.7V
<
=
SET
V
OUT
<
2.0V
210 340
2.0V
<
=
SET
V
OUT
<
2.5V
170 300
2.5V
<
=
SET
V
OUT
<
2.8V
140 250
V
DIF
Dropout
Voltage
Iout=150mA
2.8V
<
=
SET
V
OUT
<
=
3.3V
130
230
I
SS
Supply
Current
I
OUT
= 0mA
18
25 A
Istandby
Supply Current
(Standby)
V
CE
= 0V
0.1
2.0 A
V
OUT
/
V
IN
Line Regulation
Set V
OUT
+0.5V
<
=
V
IN
5.0V
0.02
0.10
%/V
RR Ripple
Rejection
f=1kHz ,Ripple 0.2Vp-p
V
IN
=Set V
OUT
+1V, I
OUT
=30mA
(In case that V
OUT
<
=
2.0V, V
IN
=3V)
75 dB
V
IN
Input
Voltage
*(2)
1.7 5.0 V
V
OUT
/
T
Output Voltage
Temperature Coefficient -40C
<
=
Topt
<
=
85
C
30
ppm
/
C
I
LIM
Short Current Limit
V
OUT
= 0V
40 mA
I
PD
CE
Pull-down
Current
0.3 A
V
CEH
CE Input Voltage "H"
1.5
V
V
CEL
CE Input Voltage "L"
0.3
V
en Output
Noise
BW
= 10Hz to 100kHz
I
OUT
=30mA
30
Vrms
R
LOW
Nch On Resistance
for Auto Discharge
(D version Only)
VIN=4.0V, VCE=0V
30
(*1) Vout
<
=
2.0V
20mV accuracy
(*2)If Vin=5.5V, maximum duration time is 500hrs.
RP100
Rev 0.04
6
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 C
OUT
with good frequency characteristics and ESR (Equivalent Series Resistance).
(Note: If additional ceramic capacitors are connected with parallel to the output pin with an output capacitor for
phase compensation, the operation might be unstable. Because of this, test these ICs with as same external
components as ones to be used on the PCB.)
PCB Layout
Make V
DD
and GND lines sufficient. If their impedance is high, noise pickup or unstable operation may result.
Connect a capacitor with a capacitance value as much as 1.0
F or more between V
DD
and GND pin, and as
close as possible to the pins.
Set external components, especially the output capacitor, as close as possible to the ICs, and make wiring as
short as possible.
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