RP111H071B_17 Datasheet, PDF (1/44 Pages) RICOH electronics devices division – Good Transient Response Low Voltage 500mA LDO

RP111x Series
Good Transient Response Low Voltage 500mA LDO
NO.EA-241-150204
OUTLINE
The RP111x Series are CMOS-based LDO regulators featuring 500mA output current. The input voltage is as
low as 1.4V and the output voltage can be set from 0.7V. Due to a built-in 0.46Ω (at VOUT=2.8V) on-resistor, RP111x
can provide a low dropout voltage. RP111x also features an excellent line transient response, ripple rejection at
75dB, and low noise. The output voltage accuracy is as high as ±0.8% and the temperature drift coefficient of
output voltage is low at ±30ppm/C. The accuracy of the output voltage of RP111x includes the temperature
characteristics and the load transient response has been improved. The typ. and max value of under/overshoot
for various output current are shown in the typical characteristics in the datasheet, therefore the accuracy of the
output voltage estimation will be easy on the actual operating cases.
In addition to a fold-back protection circuit built into conventional regulators, RP111x contains a thermal
shutdown circuit and an inrush current limit circuit. SOT-23-5 and SOT-89-5 packages, a 1.2mm square
DFN1212-6 package are available.
FEATURES
 Supply Current ...................................................... Typ. 80A
 Standby Current .................................................... Typ. 0.1A
 Dropout Voltage .................................................... Typ. 0.23V (IOUT500mA, VOUT2.5V)
 Ripple Rejection .................................................... Typ. 75dB (f1kHz)
Typ. 70dB (f10kHz)
 Output Voltage Accuracy.......................................0.8% (VOUT ≥1.8V)
 Output Voltage Temperature Coefficient ............... Typ. 30ppm/C (VOUT ≥1.8V)
 Line Regulation ..................................................... Typ. 0.02%/V
 Packages .............................................................. DFN1212-6, SOT-23-5, SOT-89-5,
 Input Voltage Range ............................................. 1.4V to 5.25V
 Output Voltage Range...........................................0.7V to 3.6V (0.1V steps)
(For other voltages, please refer to MARK INFORMATIONS.)
 Built-in Foldback Protection Circuit.......................Typ. 50mA (Current at short mode)
 Thermal Shutdown Temperature...........................165C
 Inrush Current Limit .............................................. Typ.400mA (for 180s after start-up)
 Ceramic capacitors are recommended to be used with this IC .....1.0F or more
APPLICATIONS
 Power source for portable communication equipment.
 Power source for electrical appliances such as cameras, VCRs and camcorders.
 Power source for battery-powered equipments.
 Power source for electrical home appliances.
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