AEC-Q100 Grade 1 Compliant
1 A 36V Input Low Supply Current LDO for Automotive Applications
R1518x is a CMOS-based LDO that specifically designed for automotive applications featuring 1 A output
current and 36 V 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 36 V, 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 soft-
start time at 120 µs (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) ·············· 3.5 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. 0.7 V (IOUT = 1 A, 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 ····································· R1518xxxxB/D/E/F: 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.
R1518J001C: Adjustable from 2.5 V to 12.0 V
with external resistor
Feedback Voltage: 2.5 V
● Built-in Short Current Limit Circuit ······················ Typ. 150 mA
● Built-in Fold-Back Protection Circuit···················· Min. 1.1 A
● Built-in Thermal Shutdown Circuit ······················ Typ. 160°C
● Built-in Soft-start Circuit ··································· R1518xxxxB/C/D: Typ.120 µs
R1518Jxx1E/F: Time adjustable
● Ceramic Capacitors can be used ······················· R1518xxxxB/D/E/F: 0.1 µF or more
R1518J001C: 1.0 µF or more