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R1172 Series
Low Voltage 1A Voltage Regulator
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 |
Protections / Functions
| TSD | Reverse | Current Limit | ISC | Inrush | Constant Slope | ECO mode | Auto Discharge | External Driver |
|---|---|---|---|---|---|---|---|---|
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Technical Documents
R1172x301x Dropout Voltage vs. Output Current
Quality & Packages
| Product Name | Compatibility | Package | Marking | Reliability |
|---|---|---|---|---|
| R1172Nxx1x-TR-FE |
|
SOT-23-5 | R1172N | R1172N-FE |
| R1172Hxx1x-T1-FE |
|
SOT-89-5 | R1172H | R1172H-FE |
| R1172Dxx1x-TR-FE |
|
HSON-6 | R1172D | R1172D-FE |
| R1172Sxx1x-E2-FE |
|
HSOP-6J | R1172S | R1172S-FE |
| R1172Nxx1x-TR-HE |
|
SOT-23-5 | R1172N | R1172N-HE |
| R1172Hxx2x-T1-HE |
|
SOT-89-5 | R1172Hxx2 | R1172H-HE |
| R1172Hxx2x-T1-AE |
|
SOT-89-5 | R1172Hxx2 | R1172H-AE |
| R1172Sxx2x-E2-AE |
|
HSOP-6J | R1172Sxx2 | R1172S-AE |
C
P
A
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.
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Authorized Distributors
Please contact your local distributors for any sales-related inquiry such as price, stock, delivery, etc.
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 |