RP105x SERIES
Low Voltage 400mA LDO Regulator
NO.EA-179-081028
OUTLINE
The RP105 Series are 400mA output type CMOS-based voltage regulator ICs with capability of low input
voltage (Min. 0.9V) and low output voltage (Min. 0.6V). These ICs are remarkably improved the performance at
low input voltage compared with conventional low voltage LDOs, and two power supply voltage type. (Another
power source, Bias pin voltage must be Min. 2.4V). Each of these ICs consists of a voltage reference unit, an
error amplifier, resistor-net for voltage setting, a current limit circuit to avoid the destruction, a UVLO circuit with
monitoring input voltage, and so on.
The RP105 Series have the ultra low on resistance output driver, the on resistance is Typ. 0.4Ω (@0.8V output,
I
OUT
=300mA). The built-in driver is Nch MOSFET, thus the load transient response is excellent, (under the
condition of the current between 1mA and 400mA, tr=0.5us, the undershoot level is approximately 50mV).
The output voltage of these ICs is fixed with high accuracy. Since the packages for these ICs are
DFN(PLP)1212-6, SOT-23-5 and SC-88A therefore high density mounting of the ICs on boards is possible.
FEATURES
•
•
•
•
•
•
•
•
•
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Low Supply Current..............................................................Typ. 28µA
Standby Mode ......................................................................Typ. 0.1µA
Low Dropout Voltage ............................................................Typ. 180mV (I
OUT
=400mA, Bias=3.6V)
High Ripple Rejection...........................................................Typ. 80dB (f =1kHz, V
IN
Ripple)
Typ. 50dB (f =1kHz, BIAS Ripple)
High Output Voltage Accuracy................ .............................Typ.
±15mV
(Ta=25
°C)
Typ.
±20mV
(−40°C
<
Ta
<
85°C)
=
=
Low Temperature-Drift Coefficient of Output Voltage ...........Typ.
±50ppm/°C
Excellent Line Regulation.....................................................Typ. 0.1%/V
Small Packages....................................................................DFN(PLP)1212-6, SOT-23-5,SC-88
Output Voltage.................................................................. 0.6V, 0.7V, 0.8V, 0.9V, 1.0V, 1.2V, 1.3V, 1.4V, 1.5V
Built-in Fold Back Protection Circuit.....................................Typ. 120mA (Current at short mode)
Ceramic capacitors are recommended to be used with this IC .....C
BIAS
=C
VIN
=1µF C
VOUT
=2.2µF 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
RP105X
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;
RP105xxx x x－xx
↑ ↑ ↑↑
a b a’ c
↑
d
←Part
Number
Code
a a’
Contents
Designation of Package Type:
RP105Kxx1x-xx: DFN(PLP)1212-6
RP105Nxx1x-xx: SOT-23-5
RP105Qxx2x-xx: SC-88
Setting Output Voltage (V
OUT
):
0.6V, 0.7V, 0.8V, 0.9V, 1.0V, 1.2V, 1.3V, 1.4V, 1.5V
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.
PIN CONFIGURATION
z
SOT-23-5
V
OUT
BIAS
5
4
Mark side
1
V
IN
2
GND
3
CE
3
嵌入式系统
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