Skip to main content Skip to first level navigation
Skip to main content First level navigation Menu
Contact Us About Us
Facebook (Open link in new window) YouTube (Open link in new window) LinkedIn (Open link in new window) E-mail Newsletter
Main content
Main content

R1173 Series

1A Voltage Regulator

  • Consumer
  • PLP
  • RoHS

The R1173 Series are CMOS-based LDO regulators featuring 1A output. R1173 offers almost the same basic performances as the R1172 Series. But R1173 offers an excellent load regulation. While the output voltage is internally set in the R1172 Series, the R1173 Series is available in two versions: standard version in which the output voltage is internally set and the adjusted version in which it is set with external resistors. For this reason, when the output voltage is not determined yet, the adjusted version can be used for advanced production. After the final determination of the voltage is made, it can be replaced with the standard version.

Specs & Datasheets

Input Voltage Range 1.4 V to 6.0 V (6.5 V)
Operating Temperature Range -40°C to 85°C (125°C)
Supply Current Typ. 60 µA
Standby Current Typ. 0.1 µA (Topt = 25°C)
Output Voltage Range Internally Fixed Ver.: 0.8 V to 5.0 V (0.1 V step)
Externally Adjustable Ver.: 1.0 V to VIN
Output Voltage Accuracy ±2.0% (Ta = 25°C)
Output Voltage Temperature Coefficient Typ. ±100 ppm/°C
Dropout Voltage Typ. 0.32 V (VOUT = 1.5 V, IOUT = 1 A)
Typ. 0.18 V (VOUT = 2.8 V, IOUT = 1 A)
Line Regulation Typ. 0.05%/V
Load Regulation Typ. -2 mV (IOUT = 300 mA)
Typ. -3 mV (IOUT = 1 A)
Output Current 1 A
Ripple Rejection Typ. 70 dB (VOUT = 2.8 V)
Package SOT-89-5, HSON-6, HSOP-6J

Download Datasheet

Protections / Functions

Functional Description

TSD Reverse Current Limit ISC Inrush Constant Slope ECO mode Auto Discharge External Driver

Technical Documents

Typical Application: Fixed Output Type

Typical Application: Fixed Output Type

C1,C2: 4.7µF or more

R1173x301x Dropout Voltage vs. Output Current

R1173x301x Dropout Voltage vs. Output Current

Quality & Packages

Product Name Compatibility Package Marking Reliability
  • gradeConsumerC
HSON-6 R1173D R1173D-FE
  • gradeConsumerC
SOT-89-5 R1173H R1173H-FE
  • gradeConsumerC
  • plpP
HSOP-6J R1173S R1173S-FE

Refer to the datasheets for the details on the product.
The package file includes package dimensions, taping specifications, taping reels dimensions, power dissipations, and recommended land pattern.
Please contact us or our distributors for unpublished reliability information.

Sample / Buy

Functional Description

TSD Thermal Shutdown Function
Reverse Current Protection Reverse Current Protection
Current Limit Overcurrent Protection
ISC Short Current Protection
Inrush Current Limit Inrush Current Protection
Constant Slope Constant Slope Function
ECO mode ECO Function
Auto Discharge Auto Discharge Function
External Driver External Output Driver Transistor

Search for similar products under conditions below.

Category:LDO Linear Regulators

min (V)
max (V)
min (V)
max (V)
Functions Auto Discharge