R1171x SERIES
2.0A/1.5A LDO REGULATOR
NO. EA-125-070110
OUTLINE
The R1171x Series are CMOS-based positive voltage regulator ICs. The R1171x Series have features of low
dropout voltage, high output voltage accuracy, low consumption current. Each of these ICs consists of a voltage
reference unit, an error amplifier, resistor net for setting output voltage, a current limit circuit at short mode, a
chip enable circuit, and thermal shutdown circuit. The output voltage of R1171 is fixed in the IC.
Low consumption current by the merit of CMOS process and built-in transistors with low ON-resistance make
low dropout voltage and chip enable function prolongs the battery life. These regulators are remarkable
improvement on the current regulators in terms of input transient response, and load transient response.
Thus, the R1171x Series are suitable for various power sources.
Since the packages for these ICs are high wattage HSOP-6J package, TO-252-5, high density mounting of the
ICs on boards is possible.
FEATURES
•
Supply Current ............................................................. Typ. 130µA
•
Standby Current ........................................................... Typ. 0.1µA
•
Output Current ............................................................. Min. 1.5A (V
IN
=V
OUT
+1.0V,
R1171SxxxA/B)
Min. 2.0A (V
IN
=V
OUT
+1.0V,
R1171JxxxC/D)
•
Input Voltage ................................................................ 2.1V to 6.0V
•
Output Voltage ............................................................. 1.5V to 5.0V (R1171SxxxA/B)
1.8V to 5.0V (R1171JxxxC/D)
•
Output Voltage Accuracy..............................................
±
2.0%
•
Low Dropout Voltage.................................................... Typ. 0.09V (V
OUT
=3.0V,
I
OUT
=300mA)
•
Low Temperature-drift Coefficient of Output Voltage ... Typ.
±
100ppm/°C
•
Line Regulation ............................................................ Typ. 0.05%/V
•
Packages ..................................................................... HSOP-6J, TO-252-5
•
Built-in Current Limit Circuit
•
Built-in Thermal Shutdown Circuit
•
Ceramic capacitor for phase compensation ................ C
IN
=C
OUT
=Ceramic
10µF (V
OUT
<1.8V)
C
IN
=C
OUT
=Ceramic
4.7µF (V
OUT
>
1.8V)
=
APPLICATIONS
•
•
•
•
Local Power source for Notebook PC.
Local Power source for portable appliances, cameras, and videos.
Local Power source for equipment of battery-use.
Local Power source for home appliances.
1
R1171x
SELECTION GUIDE
The output voltage, the chip-enable polarity, the taping type can be selected at the user's request.
The selection can be made with the part number as follows;
R1171xxx1x-xx-x
←Part
Number
↑ ↑
a b
Code
a
↑ ↑ ↑
c d e
Contents
Package Type;
S: HSOP-6J
J: TO-252-5
Designation of Output Voltage (V
OUT
)
Stepwise setting with 0.1V increment in the range from 1.5V to 5.0V(A/B version),
from 1.8V to 5.0V(C/D version).
“Exception” 2.85V type: R1171x281x5-xx, 1.85V Type: R1171x181x5
Designation of option;
A: Built-in Chip Enable Circuit, Active at "L" (Output Current :Min.1.5A)
B: Built-in Chip Enable Circuit, Active at "H" (Output Current :Min.1.5A)
C: Built-in Chip Enable Circuit, Active at “L” (Output Current :Min.2.0A)
D: Built-in Chip Enable Circuit, Active at “H” (Output Current :Min.2.0A)
Designation of Taping Type;
E2 (HSOP-6J) (Refer to Taping Specifications)
T1 (TO-252-5)
Designation of composition of pin plating:
-F: Lead free plating (HSOP-6J,TO-252-5)
b
c
d
e
3
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