RP108J Series Low Input Voltage 3A LDO Regulator NO.EA-203-201216 OUTLINE The RP108J is a CMOS-based voltage regulator IC featuring 3A output with low ON-resistance. The RP108J consists of a voltage reference unit, an error amplifier, resistor-net for voltage setting, a fold-back protection circuit, and a thermal shutdown circuit. The RP108J features both low supply current and high output current, and the dropout voltage is much smaller than bi-polar s. The minimum input voltage is as low as 1.6V and the output voltage can be set from 0.8V, therefore it can be connected with the DC/DC converter as the latter power supply for high density LSI that is operated by low output voltage. The output voltage of RP108J081x is externally adjustable by using external divide resistors. The CE pin of the RP108J can switch the regulator to standby mode. In addition to a fold-back protection circuit, which is already built in the conventional regulators, The RP108J contains a thermal shutdown circuit, a constant slope circuit as a soft-start function and a reverse current protection circuit. Ceramic capacitors can be used. FEATURES Output Current ............................................................. Min. 3A Supply Current ............................................................. Typ. 350 A Standby Current ........................................................... Typ. 2A Input Voltage Range .................................................... 1.6V to 5.25V Output Voltage Range .................................................. Fixed Output Voltage Type: 0.8V to 4.2V (0.1V steps) * Refer to MARK INFORMATIONS for other voltages. Adjustable Output Voltage Type: 0.8V to 4.2V Output Voltage Accuracy .............................................. 1.0% ( 15mV accuracy, When V 1.5V) SET Output Voltage Temperature-drift Coefficient ........... Typ. 100ppm/C Ripple Rejection ........................................................... Typ. 65dB (f = 1kHz, V = 2.8V) SET Dropout Voltage ........................................................... Typ. 0.51V (VSET=2.8V) Line Regulation ............................................................ Typ. 0.1%/V Package ....................................................................... TO-252-5-P2 Built-in Fold-back Protection Circuit ............................. Typ. 220mA Built-in Thermal Shutdown Circuit ................................ Stops at 165C Built-in Constant Slope Circuit Built-in Reverse Current Protection Circuit Ceramic capacitors are recommended to be used with this IC 10 F or more APPLICATIONS Power source for battery-powered equipments. Power source for portable communication equipments such as cameras and VCRs. Power source for electrical home appliances. 1 RP108J NO.EA-203-201216 BLOCK DIAGRAMS RP108Jxx1B/E RP108Jxx1D/F VDD VDD VOUT VOUT VFB VFB Vref Vref Current Limit Current Limit Thermal Shutdown Thermal Shutdown CE CE GND GND Reverse Detecter Reverse Detecter SELECTION GUIDE The output voltage, auto discharge function, and the soft-start time for the ICs can be selected at the users request. Product Name Package Quantity per Reel Pb Free Halogen Free RP108Jxx1 (y) -T1-FE TO-252-5-P2 3,000 pcs Yes Yes xx: The set output voltage (VSET) can be designated in the range of 0.8V(08) to 4.2V(42) in 0.1V steps. y: If the output voltage includes the 3rd digit, indicate the digit of 0.01V. (1.25V, 1.85V, 2.85V) Ex. If the output voltage is 1.25V, RP108J1215-T1-FE. If the output voltage is 1.85V, RP108J181 5-T1-FE. If the output voltage is 2.85V, RP108J281 5-T1-FE. : Designation of auto-discharge function at off state and the soft-start time (B) No auto-discharge function, soft start time typ. 180 s (D) Auto-discharge function, soft start time typ. 180 s (E) No auto-discharge function, soft start time typ. 570 s (F) Auto-discharge function, soft start time typ. 570 s . Auto-discharge function quickly lowers the output voltage to 0V, when the chip enable signal is switched from the active mode to the standby mode, by releasing the electrical charge accumulated in the external capacitor. Refer to CONSTANT SLOPE CIRCUIT for detailed information on the difference of soft-start time and its effect. 2