R1173x SERIES
Super low on resistance/Low voltage LDO
NO.EA-123-070828
OUTLINE
The R1173x Series are CMOS-based positive voltage regulator ICs. The R1173x Series have features of
super low dropout, 1A output current capability, and -3mV typical load regulation at 1A. Even the output voltage
is set at 1.5V, on resistance of internal FET is typically 0.32Ω. Therefore, applications that require a large current
at small dropout are suitable for the R1173x series. Low input voltage is acceptable and low output voltage can
be set. The minimum input voltage is 1.4V, and the lowest set output voltage is 0.8V. Each of these ICs consists
of a voltage reference unit, an error amplifier, resistor net for setting output voltage, a current limit circuit at
over-current, a chip enable circuit, a thermal-shutdown circuit, and so on. A stand-by mode with ultra low
consumption current can be realized with the chip enable pin. The output voltage types of R1173 are fixed one in
the IC and adjustable one (R1173x001x).
Since the packages for these ICs are the SOT-89-5 package, HSON-6, or HSOP-6J, high density mounting of
the ICs on boards is possible.
FEATURES
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Output Current ............................................................. 1A
Supply Current ............................................................. Typ. 60µA
Standby Current ........................................................... Typ. 0.1µA
Input Voltage Range .................................................... 1.4V to 6.0V
Output Voltage Range (R1173xxx1) ............................ 0.8V to 5.0V (HSOP-6J: 0.8V to 3.5V)
Output Voltage Range (R1173x001) ............................ 1.0V to V
IN
Dropout Voltage ........................................................... Typ. 0.32V (V
OUT
=1.5V,
I
OUT
=1A)
Typ. 0.18V (V
OUT
=2.8V,
I
OUT
=1A)
Ripple Rejection........................................................... Typ. 70dB (V
OUT
=2.8V)
Output Voltage Accuracy..............................................
±2.0%
Temperature-drift Coefficient of Output Voltage........... Typ.
±100ppm/°C
Line Regulation ............................................................ Typ. 0.05%/V
Load Regulation........................................................... Typ.
−2mV
(I
OUT
=300mA)
Typ.
−3mV
(I
OUT
=1A)
Packages ..................................................................... SOT-89-5, HSON-6, HSOP-6J
Low inrush current at turning-on .................................. Typ. 500mA
Built-in Current Limit Circuit ......................................... Typ. 250mA
Output capacitors ......................................................... C
IN
=Ceramic
4.7µF
C
OUT
=Tantalum
4.7µF (V
OUT
<1.0V)
C
OUT
=Ceramic
4.7µF (V
OUT
>
1.0V)
=
Built-in Thermal Shutdown Circuit
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APPLICATIONS
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Local Power source for Notebook PC.
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Local Power source for portable communication equipments, cameras, and videos.
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Local Power source for home appliances.
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R1173x
SELECTION GUIDE
The output voltage, auto discharge function*, the package type, etc. can be selected at the user's request.
The selection can be made with the part number as follows;
R1173xxx1x-xx-x
←Part
Number
↑↑
a b
Code
A
↑ ↑ ↑
c d e
Contents
Package Type;
H: SOT-89-5, D: HSON-6, S: HSOP-6J
Designation of Output Voltage (V
OUT
)
External Setting Type: 00
(ADJ pin voltage is fixed at 1.0V.)
Fixed Type: 08 to 50
(Stepwise setting with 0.1V increment in the range from 0.8V to 5.0V, exceptions;
1.85V output: R1173x181x5-xx, 2.85V output: R1173x281x5-xx)
Designation of Mask Option:
B: Built-in Chip Enable Circuit, Active at "H", without auto discharge function*
D: Built-in Chip Enable Circuit, Active at "H", with auto discharge function*
Designation of Taping Type;
T1 (SOT-89-5), TR (HSON-6), E2 (HSOP-6J)
(Refer to Taping Specifications)
Designation of composition of plating:
−F:
Lead free plating (SOT-89-5, HSON-6, HSOP-6J)
b
c
d
e
*) 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 CONFIGURATIONS
SOT-89-5
Top View
5
4
HSON-6
Bottom View
4
5
6
6
HSOP-6J
5
4
6
5
4
∗
∗
1
2
3
∗
3
2
1
1
2
3
1
2
3
3
R1173x
PIN DESCRIPTIONS
SOT-89-5
Pin No.
1
2
3
4
5
Symbol
ADJ or NC
GND
CE
V
DD
V
OUT
Description
ADJUST Pin (R1173H001x)
No Connection (R1173Hxx1x)
Ground Pin
Chip Enable Pin
Input Pin
Output Pin
4
5
6
GND
CE
V
DD
HSON-6
Pin No.
1
2
3
Symbol
V
OUT
V
OUT
ADJ or NC
Description
Output Pin
Output Pin
ADJUST Pin (R1173D001x)
No Connection (R1173Dxx1x)
Ground Pin
Chip Enable Pin
Input Pin
* Tab in the
parts have GND level. (They are
connected to the back side of this IC.)
Connect Pin1 and Pin2 as short as possible.
HSOP-6J
Pin No.
1
2
3
4
5
6
Symbol
V
OUT
GND
ADJ or NC
CE
GND
V
DD
Description
Output Pin
Ground Pin
ADJUST Pin (R1173S001x)
No Connection (R1173Sxx1x)
Chip Enable Pin
Ground Pin
Input Pin
ABSOLUTE MAXIMUM RATINGS
Symbol
V
IN
V
CE
V
OUT
I
OUT
P
D
Topt
Tstg
Input Voltage
Input Voltage (CE Input Pin)
Output Voltage
Output Current
Power Dissipation (SOT-89-5)*
Power Dissipation (HSON-6)*
1
Power Dissipation (HSOP-6J)*
1
Operating Temperature
Storage Temperature
1
Item
Rating
6.5
−0.3
to 6.5
−0.3
to V
IN
+0.3
1.4
900
900
1700
−40
to 85
−55
to 125
Unit
V
V
V
A
mW
°C
°C
*1) For Power Dissipation, please refer to PACKAGE INFORMATION to be described.
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