R1518x SeriesAEC-Q100 Compliant

1A 36V Input Low Supply Current LDO for Automotive Applications


Data Sheet

Data Sheet

R1518x is a CMOS-based LDO that specifically designed for automotive applications featuring 1A output current and 36V input voltage. In addition to a conventional regulator circuit, R1518x 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 36V, the R1518x is very suitable for power source of car accessories.
R1518x is available in R1518xxxxB/D/E/F with the internally fixed output voltage, and R1518xxxxD/F with the auto-discharge function at standby.
R1518J001C can adjust the output voltage with an external resistor. R1518xxxxB/C/D internally fixes the softstart time at 120µs (Typ). R1518Jxx1E/F can adjust the soft-start time with an external capacitor.
R1518x is available in two packages for ultra high wattage: HSOP-6J and TO-252-5-P2.


Input Voltage Range (Maximum Rating) 3.5V to 36.0V (50.0V)
Operating Temperature Range −40°C to 125°C
Supply Current Typ. 18µA
Standby Current Typ. 0.1µA
Dropout Voltage Typ. 0.7V (IOUT = 1A, VOUT = 5.0V)
Output Voltage Accuracy ±0.8% (VOUT ≤ 5.0V)
Temperature-Drift Coefficient of Output Voltage Typ. ±60ppm/°C (−40°C ≤ Ta ≤ 125°C)
Line Regulation Typ. 0.01%/V
HSOP-6J, TO-252-5-P2
Output Voltage Range R1518xxxxB/D/E/F: 2.5V/ 2.8V/ 3.0V/ 3.3V/ 3.4V/ 5.0V/ 6.0V/ 8.0V/ 8.5V/ 9.0V
*Contact Ricoh sales representatives for other voltages.
R1518J001C: Adjustable from 2.5V to 12.0V with external resistor
Feedback Voltage: 2.5V
Built-in Short Current Limit Circuit Typ. 150mA
Built-in Fold-Back Protection Circuit Min. 1.1A
Built-in Thermal Shutdown Circuit Typ. 160°C
Built-in Soft-start Circuit R1518xxxxB/C/D: Typ.120µs
R1518Jxx1E/F: Time adjustable
Ceramic Capacitors can be used R1518xxxxB/D/E/F: 0.1µF or more
R1518J001C: 1.0µF or more


  • Power source for car accessories including car audio equipment, car navigation system, and ETC system.
  • Power source for control units including EV inverter and charge control.

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Data Sheet Package Quality Assurance Data Suffix Composition & Content*1
R1518x Series
HSOP-6J Contact us*2 -KE Sn (Sn: 100%)
Reliability -AE
TO-252-5-P2 Contact us*2 -KE Sn (Sn: 100%)
Reliability -AE
  • *1The composition of the product cannot be specified.
  • *2The reliability information is not listed for devices above rank2. Please contact Ricoh sales representatives for further informations.

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