LOW NOISE 150mA LDO REGULATOR
R1116x SERIES
1
OUTLINE
The R1116x 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
error amplifier, resistor-net for voltage setting, a short current limit circuit, a chip enable circuit, and so on.
These ICs perform with low dropout voltage and the chip-enable function. The supply current at no load of this
IC is only 10uA, and the line transient response and the load transient response of the R1116x 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 SON1612-6 therefore high density mounting of the ICs on boards is possible.
FEATURES
Low Supply Current..............................................................Typ. 10
A
Standby Mode ......................................................................Typ. 0.1
A
Low Dropout Voltage ............................................................Typ. 0.29V (I
OUT
=150mA 2.8V Output type)
High Ripple Rejection...........................................................Typ. 70dB (f
=
1kHz 3.0V Output type)
..............................................................................................Typ. 53dB (f
=
10kHz)
Low Temperature-Drift Coefficient of Output Voltage...........Typ.
100ppm/
C
Excellent Line Regulation.....................................................Typ. 0.02%/V
High Output Voltage Accuracy..............................................
1
.5%( V
OUT
3.0V)
Small Packages ..................................................................SOT-23-5/SON1612-6
Input Voltage Range.............................................................1.8V to 6.0V
Output Voltage......................................................................Stepwise setting with a step of 0.1V in the range
from 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 ....C
IN
=
C
OUT
=
1
F
APPLICATIONS
Power source for portable communication equipment.
Power source for electrical appliances such as cameras, VCRs and camcorders.
Power source for battery-powered equipment.
R1116x
2
BLOCK DIAGRAMS
R1116xxx1B
R1116xxx1D
V
OUT
GND
V
DD
CE
Vref
Current Limit
+
-
V
OUT
GND
V
DD
CE
Vref
Current Limit
+
-
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;
R1116xxx1x-xx
Part Number
a
b
c
d
Code Contents
a
Designation of Package Type:
N: SOT-23-5
D: SON1612-6
b
Setting Output Voltage (V
OUT
):
Stepwise setting with a step of 0.1V in the range of 1.5V to 4.0V is possible.
Exceptions: 2.85V= R1116x281x5, 1.85V=R1116x181x5
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.)
PIN CONFIGURATION
z SOT-23-5
z SON1612-6
1
2
3
5
4
(mark side)
1 2 3
6 5 4
R1116x
3
PIN DESCRIPTIONS
R1116N
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
R1116D
Pin No.
Symbol
Description
1 CE
Chip
Enable
Pin
2 GND
Ground
Pin
3 V
DD
Input
Pin
4 V
OUT
Output
Pin
5 GND
Ground
Pin
6 NC
No Connection
ABSOLUTE MAXIMUM RATINGS
Symbol Item
Rating Unit
V
IN
Input
Voltage
6.5
V
V
CE
Input Voltage (CE Pin)
6.5 V
V
OUT
Output
Voltage
-
0.3~V
IN
+
0.3
V
I
OUT
Output
Current
160
mA
250(SOT-23-5) mW
P
D
Power
Dissipation
500(SON1612-6)
Note1
mW
Topt
Operating Temperature Range
-
40~85
C
Tstg
Storage Temperature Range
-
55~125
C
*Note 1: This specification is at mounted on board.
P
D
depends on conditions of mounting on board. This specification is based on the measurement at
the condition below:
Measurement Conditions
Environment: Mounted on board (Wind velocity 0m/s)
Board Material: FR-4 (2-layer)
Board dimensions : 40mm
40mm
t1.6mm
Copper Area : 50%
R1116x
5
ELECTRICAL CHARACTERISTICS by OUTPUT VOLTAGE
Topt
=
25
C
Dropout Voltage
V
DIF
(V)
Output Voltage V
OUT
(V)
Condition Typ.
Max.
V
OUT
=
1.5V
0.54
0.86
1.5V<V
OUT
1.6V
0.50
0.75
1.6V<V
OUT
1.7V
0.46
0.70
1.7V<V
OUT
<
=
2.0V 0.44
0.65
2.0V<V
OUT
<
=
2.7V 0.37
0.56
2.7V<V
OUT
<
=
4.0V
I
OUT
=
150mA
0.29 0.46
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.
TEST CIRCUITS
C2 = Ceramic1.0
F
*C1 = Ceramic1.0
F
C1
V
OUT
C2
GND
V
OU
T
V
DD
R1116X
SERIES
I
OUT
V
CE
Fig.1 Standard test Circuit
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