AEC-Q100 Grade 1 Compliant
500 mA 36V Input Low Supply Current LDO for Automotive Applications
R1517x is a CMOS-based LDO that specifically designed for automotive applications featuring 500 mA output
current and 36 V input voltage. In addition to a conventional regulator circuit, R1517x consists of a constant slope
circuit as a soft-start function, a fold-back protection circuit, a short current limit circuit, and a thermal shutdown
circuit. Besides the low supply current by CMOS, the operating temperature is −40°C to 125°C and the maximum
input voltage is 36 V, the R 1517x is ver y s uit able f or power s our c e of c ar acc es s or ies .
R1517x supports the internal fixed output voltage type of R1517xxxxB/D/E/F and the adjustable output voltage
setting type, which is controlled by external resistances, of R1517J001C. As for the soft-start time, R1517x is
fixed internal in R1517xxxxB/D/E/F and is set to 120 µs (Typ). And the soft-start time in R1517Jxx1E/F is
adjustable by external capacitors. R1517x supports the auto-discharge function at standby in R1517xxxxD/F.
R1517x is available in two packages for ultra-high wattage: HSOP-6J and TO-252-5-P2.
Input Voltage Range (Maximum Rating) ················ 3.5 V to 36.0 V (50.0V)
Operating Temperature Range ···························· 40°C to 125°C
Supply Current················································· Typ. 18 µA
Standby Current ··············································· Typ. 0.1 µA
Dropout Voltage ··············································· Typ. 0.35 V (IOUT = 500 mA, VOUT = 5.0 V)
Output Voltage Accuracy ···································· ±0.8% (VOUT ≤ 5.0 V)
Temperature-Drift Coefficient of Output Voltage······· Typ. ±60 ppm/°C (−40°C ≤ Ta ≤ 125°C)
Line Regulation ················································ Typ. 0.01%/V
Packages ······················································· HSOP-6J, TO-252-5-P2
Output Voltage Range ······································· 2.5 V/2.8 V/3.0 V/3.3 V/3.4 V/5.0 V/ 6.0 V/8.0 V
/8.5 V/9.0 V
* Contact Ricoh sales representatives for other voltages.
R1517J001C: Adjustable from 2.5 V to 12.0 V with External
Feedback Voltage: 2.5 V
Built-in Short Current Limit Circuit ························ Typ. 75 mA
Built-in Fold-Back Protection Circuit······················ Min. 500 mA
Built-in Thermal Shutdown Circuit ························ Typ. 160°C
Built-in Soft-start Circuit ····································· Typ.120 µs
R1517Jxx1E/F: Adjustable Time Setting with External
Usable Ceramic Capacitors ································ 0.1 µF or more
R1517J001C: 1.0 µF or more