R1172 Series

Low Voltage 1A Voltage Regulator

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Description

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.

Spec

	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

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

Functional Description

Quality &
Packages

Product Name	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

Refer to the datasheets for the details on the product.
The package file or the datasheet includes package dimensions, taping specifications, taping reels dimensions, power dissipations, and recommended land pattern.

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