300mA Low Voltage LDO REGULATOR
R1131x SERIES
OUTLINE
NO. EA-116-0503
The R1131x Series are CMOS-based low voltage regulator ICs with output voltage range from 0.8V to 3.3V.
The minimum operating voltage is 1.4V. Each of these voltage regulator ICs consists of a voltage reference unit,
an error amplifier, resistors for setting output voltage, a current limit circuit, and a chip enable circuit.
To prevent the destruction by over current, current limit circuit is included. Standby mode realizes ultra small
consumption current.
The output voltage of these ICs is internally fixed with high accuracy. Since the packages for these ICs are
SOT-23-5, SON-6, and HSON-6, high density mounting of the ICs on boards is possible.
FEATURES
•
Ultra-Low Supply Current .................................Typ. 80µA (V
OUT
<1.8V),
Typ. 60µA (V
OUT
>
1.8V)
=
•
Standby Mode ...................................................Typ. 0.1µA
•
Low Dropout Voltage.........................................Typ. 0.48V(I
OUT
=300mA
Output Voltage=1.0V Type)
Typ. 0.31V(I
OUT
=300mA
Output Voltage=1.5V Type)
Typ. 0.23V(I
OUT
=300mA
Output Voltage=3.0V Type)
•
High Ripple Rejection .......................................Typ. 65dB(f=1kHz)
•
Low Temperature-Drift Coefficient of Output Voltage Typ. ±100ppm/°C
•
Excellent Line Regulation .................................Typ. 0.01%/V
•
High Output Voltage Accuracy ..........................±2.0%
•
Small Package ................................................SOT-23-5(Super Mini-mold), SON-6, HSON-6
•
Output Voltage ..................................................Stepwise setting with a step of 0.1V in the range of
0.8V to 3.3V is possible
•
Input Voltage .....................................................Min. 1.40V
•
Built-in fold-back protection circuit ....................Typ. 50mA (Current at short mode)
•
External Capacitors...........................................C
IN
=
C
OUT
=
Tantalum 1.0µF (V
OUT
<1
.
0V)
C
IN
=
C
OUT
=Ceramic
1.0µF (V
OUT
>
1.
0V)
=
APPLICATIONS
•
Precision Voltage References.
•
Power source for electrical appliances such as cameras, VCRs and hand-held communication equipment.
•
Power source for battery-powered equipment.
1
R1131x
BLOCK DIAGRAM
R1131xxxxA
V
DD
V
OUT
R1131xxxxB
V
DD
-
+
V
OUT
Vref
Current Limit
CE
GND
Vref
Current Limit
CE
GND
R1131xxxxD
V
DD
-
+
Vref
Current Limit
CE
GND
V
OUT
SELECTION GUIDE
The output voltage, the chip enable polarity, package type, and the taping type for the ICs can be selected at
the user's request. The selection can be available by designating the part number as shown below;
R1131xxxxx-xx
↑ ↑ ↑↑ ↑
a b a'c d
Code
a, a'
←Part
Number
Contents
Designation of Package Type :
R1131Nxx1x-xx:SOT-23-5 (Mini-mold)
R1131Dxx1x-xx:SON-6,
R1131Dxx2x-xx:HSON-6
Setting Output Voltage (V
OUT
):Stepwise setting with a step of 0.1V in the
range of 0.8V to 3.3V is possible. If the output=1.85V, then the code is
R1131x18xx5. If the output=2.85, then the code is R1131x28xx5.
Designation of Chip Enable Option :
A:“L” active type.
B:“H” active type.
D:"H" active and with auto discharge function
Designation of Taping Type : TR
Refer to Taping Specifications
b
c
d
2
R1131x
ABSOLUTE MAXIMUM RATINGS
Symbol
V
IN
V
CE
V
OUT
I
OUT
P
D
Topt
Tstg
Input Voltage
Input Voltage(
CE
/CE Pin)
Output Voltage
Output Current
Power Dissipation(SOT23-5)
Power Dissipation(SON-6)
Power Dissipation(HSON-6)
Operating Temperature Range
Storage Temperature Range
Item
Rating
6.5
−0.3
~ 6.5
−0.3
~ V
IN
+0.3
350
250
400
−40
~ 85
−55
~ 125
°C
°C
Unit
V
V
V
mA
mW
ELECTRICAL CHARACTERISTICS
•
R1131xxxxA
Item
Output Voltage
Output Current
Load Regulation
Dropout Voltage
Supply Current
Conditions
V
IN
=
Set V
OUT
+1V
1µA
<
I
OUT
<
30mA
Note 1
=
=
Min.
V
OUT
×0.98
(−30mV)
300
Typ.
Max.
V
OUT
×1.02
(30mV)
Topt=25°C
Symbol
V
OUT
I
OUT
∆V
OUT
/
∆I
OUT
V
DIF
I
SS1
Unit
V
mA
V
IN
−
V
OUT
=
1.0V
V
IN
=Set
V
OUT
+1V,
40
70
mV
1mA
<
I
OUT
<
300mA
=
=
Refer to the ELECTRICAL CHARACTERISTICS by OUTPUT VOLTAGE
V
IN
=
Set V
OUT
+1V,V
OUT
<1.8V
V
IN
=
Set V
OUT
+1V,V
OUT
>
1.8V
=
V
IN
=
V
CE
=
Set V
OUT
+1V
Set V
OUT
+0.5V
<
V
IN
<
6.0V
=
=
I
OUT
=
30mA
Set V
OUT
< 0.9V: 1.4V
<
V
IN
<
6.0V
=
=
f
=
1kHz, Ripple 0.2Vp-p
V
IN
=
Set V
OUT
+
1V,I
OUT
=
30mA
1.4
I
OUT
=
30mA
−40°C
<
Topt
=
V
OUT
=
0V
<
=
80
60
0.1
0.01
65
111
90
1.0
0.15
µA
µA
µA
%/V
dB
Istandby Supply Current (Standby)
∆V
OUT
/
∆V
IN
RR
V
IN
∆V
OUT
/
∆T
I
LIM
R
PU
V
CEH
V
CEL
V
EN
Line Regulation
Ripple Rejection
Input Voltage
Output Voltage
Temperature Coefficient
Short Current Limit
CE
Pull-up Resistance
CE
Input Voltage “H”
CE
Input Voltage “L”
Output Noise
<
=
6.0
±100
85°C
1.87
1.0
0.0
50
5.00
V
ppm
/°C
mA
MΩ
V
V
µVrms
12.00
6.0
0.3
BW
=
10Hz to 100kHz
1.5V.
30
Note1:
±30mV
tolerance for V
OUT
4
Analog electronics
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