LOW NOISE 150mA LDO REGULATOR
RP103 SERIES
OUTLINE
Preliminary
NO. EA-149-070309
The RP103 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 RP103 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 PLP1010-4,
SOT23-5, SC82-AB, therefore high density mounting of the ICs on boards is possible.
FEATURES
•
•
•
•
•
•
•
•
•
Low Supply Current..............................................................TYP. 36µA
Standby Mode ......................................................................TYP. 0.1µA
Low Dropout Voltage ............................................................TYP. 0.210V (I
OUT
=150mA, 2.8V Output type)
High Ripple Rejection...........................................................TYP. 75dB (f=1kHz)
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 ..................................................................PLP1010-4, SOT-23-5, SC-82AB
Output Voltage......................................................................1.2V, 1.3V, 1.5V, 1.8V, 1.85V, 1.9V, 2.0V, 2.5V,
2.6V, 2.7V, 2.8V, 2.85V, 2.9V, 3.0V, 3.1V, 3.3V
•
Built-in Fold Back Protection Circuit.....................................TYP. 40mA (Current at short mode)
•
Ceramic capacitors are recommended to be used with this IC
C
IN
=C
OUT
=0.47µF
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.
1
RP103
BLOCK DIAGRAMS
RP103xxx1B
V
DD
-
+
Vref
Vref
Current Limit
RP103xxx1D
V
OUT
V
DD
-
+
CE
Current Limit
V
OUT
CE
GND
GND
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;
RP103xxx1x-xx
↑ ↑
a b
↑ ↑
c d
←Part
Number
Code
a
Contents
Designation of Package Type:
K: PLP1010-4
N: SOT-23-5
Q: SC-82AB
Setting Output Voltage (V
OUT
):
1.2V, 1.3V, 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
Exception:1.85V=RP103x181x5, 2.85V=RP103x281x5
Designation of Active Type:
B: active high type*
D: active high, with auto discharge*
Designation of Taping Type:
Ex. TR (refer to Taping Specifications; TR type is the standard direction.)
b
c
d
*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.
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