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PDF ( 数据手册 , 数据表 ) R1114

零件编号 R1114
描述 LOW NOISE 150mA LDO REGULATOR
制造商 RICOH
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R1114 数据手册, 描述, 功能
R1114x SERIES
LOW NOISE 150mA LDO REGULATOR
NO.EA-094-0512
OUTLINE
The R1114x Series are CMOS-based voltage regulator ICs with high output voltage accuracy, low supply
current, low ON-resistance, and high ripple rejection. Each of these ICs consists of a voltage reference unit, an
www.DataSheete4rUr.ocromamplifier, 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 R1114x 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,
SC-82AB, and SON1612-6 therefore high density mounting of the ICs on boards is possible.
FEATURES
Low Supply Current ............................................................. Typ. 75µA
Standby Mode ...................................................................... Typ. 0.1µA
Low Dropout Voltage............................................................ Typ. 0.22V (IOUT=150mA 3.0V Output type)
High Ripple Rejection .......................................................... Typ. 70dB (f=1kHz 3.0V Output type)
............................................................................................. Typ. 60dB (f=10kHz)
Low Temperature-Drift Coefficient of Output Voltage........... Typ. ±100ppm/°C
Excellent Line Regulation .................................................... Typ. 0.02%/V
High Output Voltage Accuracy ............................................. ±2.0%
Small Packages ................................................................. SOT-23-5/SC-82AB/SON1612-6
Output Voltage ..................................................................... Stepwise setting with a step of 0.1V in
the range of 1.5V to 4.0V is possible
Built-in Fold Back Protection Circuit .................................... Typ. 40mA (Current at short mode)
Ceramic capacitors are recommended to be used with this IC ... CIN=COUT=1µF (VOUT<2.5V)
CIN=1µF, COUT=0.47µF (VOUT >= 2.5V)
APPLICATIONS
Power source for portable communication equipment.
Power source for electrical appliances such as cameras, VCRs and camcorders.
Power source for battery-powered equipment.
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R1114 pdf, 数据表
R1114x
ELECTRICAL CHARACTERISTICS by OUTPUT VOLTAGE
Output Voltage VOUT (V)
VOUT = 1.5
www.DataSheet4U.com
VOUT = 1.6
VOUT = 1.7
1.8 <= VOUT <= 2.0
2.1 <= VOUT <= 2.7
2.8 <= VOUT <= 4.0
Dropout Voltage
VDIF (V)
Condition
IOUT = 150mA
Topt = 25°C
Typ.
0.38
0.36
0.34
0.32
0.28
0.22
Max.
0.70
0.65
0.60
0.55
0.50
0.35
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 COUT 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 VDD 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 1.0µF or more between VDD 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.
8







R1114 equivalent, schematic
R1114x
90
80
70
60
50
40
30
www.DataSheet4U.com 20
10
0
2.9
R1114x281x
Ripple 0.2Vp-p, IOUT=50mA
f=1kHz
f=10kHz
f=100kHz
3.0 3.1 3.2
Input Voltage VIN(V)
3.3
9) Ripple Rejection vs. Frequency (CIN=none)
90
80
70
60
50
40
30
20
10
0
0.1
R1114x151x
VIN=2.5VDC+0.5Vp-p,
COUT=Ceramic 1.0µF
IOUT=1mA
IOUT=30mA
IOUT=50mA
1 10
Frequency f(kHz)
100
90
80
70
60
50
40
30
20
10
0
0.1
R1114x281x
VIN=3.8VDC+0.5Vp-p,
COUT=Ceramic 0.47µF
IOUT=1mA
IOUT=30mA
IOUT=50mA
1 10
Frequency f(kHz)
100
16
90
80
70
60
50
40
30
20
10
0
2.9
R1114x281x
Ripple 0.5Vp-p, IOUT=50mA
f=1kHz
f=10kHz
f=100kHz
3.0 3.1 3.2
Input Voltage VIN(V)
3.3
90
80
70
60
50
40
30
20
10
0
0.1
90
80
70
60
50
40
30
20
10
0
0.1
R1114x151x
VIN=2.5VDC+0.5Vp-p,
COUT=Ceramic 2.2µF
IOUT=1mA
IOUT=30mA
IOUT=50mA
1 10
Frequency f(kHz)
100
R1114x281x
VIN=3.8VDC+0.5Vp-p,
COUT=Ceramic 1.0µF
IOUT=1mA
IOUT=30mA
IOUT=50mA
1 10
Frequency f(kHz)
100










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