R1517 Datasheet, PDF (1/38 Pages) RICOH electronics devices division – Input Voltage Range (Maximum Rating) 3.5 V to 36.0 V (50.0V)

R1517x Series
500 mA 36V Input Low Supply Current LDO
NO. EA−304−170112
OUTLINE
R1517x is a CMOS-based LDO that specifically designed 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 105°C and the maximum input voltage is 36 V, the
R1517x is very suitable for power source of car accessories. 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 R1517x001C. As for the soft-start time, R1517x is fixed internal in R1517xxxxB/C/D and is set to
120 µs (Typ). And the soft-start time in R1517xxxxE/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.
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FEATURES
 Input Voltage Range (Maximum Rating) ················ 3.5 V to 36.0 V (50.0V)
 Operating Temperature Range ···························· 40°C to 105°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)
 Line Regulation ················································ Typ. 0.01%/V
 Packages ······················································· HSOP-6J, TO-252-5-P2
 Output Voltage Range ······································· R1517xxxxB/D/E/F: 2.5 V/3.3 V/3.4 V/5.0 V/ 8.5V
* Contact Ricoh sales representatives for other voltages.
R1517x001C: Adjustable from 2.5 V to 12.0 V with External
Resistors.
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
R1517xxxxE/F: Adjustable Time Setting with External
Capacitors.
 Usable Ceramic Capacitors ································ R1517xxxxB/D/E/F: 0.1 µF or more
R1517x001C: 1.0 µF or more
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