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

R1172 Series

Low Voltage 1A Voltage Regulator

  • Consumer
  • Automotive
  • PLP
  • RoHS

The R1172 Series are CMOS-based LDO regulators featuring 1A output. The CMOS process provides both high output current and low supply current. The dropout voltage is significantly lower than bipolar regulators. The R1172 handles low voltage with an input voltage from 1.4V and output voltage from 0.8V. Accordingly, the device supports highly integrated, low voltage-driven LSI as a rear stage of the DC/DC converter. The CE pin can switch the regulator into standby mode. In addition to a fold-back protection circuit built into conventional LDO regulators, R1172 has a thermal shutdown circuit and inrush current limit circuit.

Specs & Datasheets

  Consumer Automotive
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
Output Voltage Range 0.8 V to 5.0 V (0.1 V step)
Output Voltage Accuracy ±2.0% (Ta = 25°C)
Output Voltage Temperature Coefficient Typ. ±100 ppm/°C
Dropout Voltage Typ. 0.32 V (VSET = 1.5 V, IOUT = 1 A)
Typ. 0.18 V (VSET = 2.8 V, IOUT = 1 A)
Line Regulation Typ. 0.05%/V
Load Regulation Typ. 15 mV (IOUT = 300 mA)
TYP. 50 mV (IOUT = 1 A)
Output Current 1 A
Ripple Rejection Typ. 70 dB (VSET = 2.8 V)
Output Noise Voltage 30 µVrms
Package SOT-23-5, SOT-89-5, HSOP-6J, HSON-6 SOT-23-5, SOT-89-5, HSOP-6J

Download Datasheet

Protections / Functions

Functional Description

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

Technical Documents

R1172x301x Dropout Voltage vs. Output Current

R1172x301x Dropout Voltage vs. Output Current

Quality & Packages

Product Name Compatibility Package Marking Reliability
  • gradeConsumerC
  • plpP
SOT-23-5 R1172N R1172N-FE
  • gradeConsumerC
  • plpP
SOT-89-5 R1172H R1172H-FE
  • gradeConsumerC
HSON-6 R1172D R1172D-FE
  • gradeConsumerC
  • plpP
HSOP-6J R1172S R1172S-FE
  • gradeAutomotiveA
  • plpP
SOT-23-5 R1172N R1172N-HE
  • gradeAutomotiveA
  • plpP
SOT-89-5 R1172Hxx2 R1172H-HE
  • gradeAutomotiveA
  • plpP
SOT-89-5 R1172Hxx2 R1172H-AE
  • gradeAutomotiveA
  • plpP
HSOP-6J R1172Sxx2 R1172S-AE

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