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R1173S Datasheet Preview

R1173S Datasheet

Super low on resistance/Low voltage LDO

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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 0.32. 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
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 VIN
Dropout Voltage ........................................................... Typ. 0.32V (VOUT=1.5V, IOUT=1A)
Typ. 0.18V (VOUT=2.8V, IOUT=1A)
Ripple Rejection........................................................... Typ. 70dB (VOUT=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 (IOUT=300mA)
Typ. 3mV (IOUT=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 ......................................................... CIN=Ceramic 4.7µF
COUT=Tantalum 4.7µF (VOUT<1.0V)
COUT=Ceramic 4.7µF (VOUT >= 1.0V)
Built-in Thermal Shutdown Circuit
APPLICATIONS
Local Power source for Notebook PC.
Local Power source for portable communication equipments, cameras, and videos.
Local Power source for home appliances.
1




RICOH

R1173S Datasheet Preview

R1173S Datasheet

Super low on resistance/Low voltage LDO

No Preview Available !

R1173x
BLOCK DIAGRAMS
R1173xxx1B
VDD
VOUT
VDD
www.DataSheet4U.com
R1173xxx1D
VOUT
Vref
Current Limit
CE
R1173x001B
VDD
Vref
Current Limit
CE
GND
CE
Vref
Current Limit
VOUT
VDD
ADJ
GND
CE
R1173x001D
Vref
Current Limit
GND
VOUT
ADJ
GND
2


Part Number R1173S
Description Super low on resistance/Low voltage LDO
Maker RICOH
Total Page 30 Pages
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