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RP115L421B Dataheets PDF



Part Number RP115L421B
Manufacturers RICOH electronics
Logo RICOH electronics
Description Low On Resistance / Low Voltage 1ch 500mA/ 1.0A Alternative LDO
Datasheet RP115L421B DatasheetRP115L421B Datasheet (PDF)

RP115x SERIES Low On Resistance/ Low Voltage 1ch 500mA/ 1.0A Alternative LDO NO. EA-274-141205 OUTLINE The RP115x Series are CMOS-based positive voltage regulators featuring 500mA/ 1.0A that provide high ripple rejection, low dropout voltage, high output voltage accuracy, and low supply current. Internally, the RP115x Series consist of a voltage reference unit, an error amplifier, a resistor-net for output voltage setting, a current limit circuit, a thermal shutdown circuit, and a reverse curren.

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RP115x SERIES Low On Resistance/ Low Voltage 1ch 500mA/ 1.0A Alternative LDO NO. EA-274-141205 OUTLINE The RP115x Series are CMOS-based positive voltage regulators featuring 500mA/ 1.0A that provide high ripple rejection, low dropout voltage, high output voltage accuracy, and low supply current. Internally, the RP115x Series consist of a voltage reference unit, an error amplifier, a resistor-net for output voltage setting, a current limit circuit, a thermal shutdown circuit, and a reverse current protection circuit. The RP115x Series uses CMOS process for achieving low supply current, low On Resistance for low dropout voltage (TYP. 0.195V (DFN1216-8, IOUT=1.0A, VSET=1.2V)) and CE function for long battery life. Excellent ripple rejection, input transient response, and load transient response make this series ideal for the power sources of mobile communication equipments. The RP115x Series are available in the DFN1216-8 package for space saving and the SOT-89-5 (Output current: 1.0A fixed) package for higher power applications. The RP115L Series (DFN1216-8 package) can choose the output current limit between 1.0A or 500mA by alternating the LCON pin between “H” or “L”. The RP115H Series (SOT-89-5 package) can output only 1.0A since it does not include the LCON pin. FEATURES • Supply Current ········································ TYP. 110μA • Supply Current (Standby Mode) ·················· TYP. 0.5μA • Dropout Voltage ······································ TYP. 0.195V (DFN1216-8: IOUT=1.0A, VSET=1.2 V) TYP. 0.235V (SOT-89-5: IOUT=1.0A, VSET=1.2 V) • Ripple Rejection ······································ TYP. 80dB (f=1kHz, VSET ≤ 1.8V) TYP. 75dB (f=1kHz, VSET > 1.8V) • Output Voltage Accuracy ··························· ±1.0% (VSET ≥ 1.75V) • Output Voltage Temperature Coefficient········ TYP. ±30ppm/ ºC (VSET ≥ 1.75V) • Line Regulation ······································· TYP. 0.02%/V • Package ················································ DFN1216-8, SOT-89-5 • Output Voltage Range······························· 0.7V to 4.3V*1 (0.1V increments) • Built-in Short Current Limit Circuit················ TYP. 60mA (DFN1216-8: LCON = "L") • Built-in Peak Current Limit • Built-in Thermal Shutdown Circuit················ Thermal Shutdown Temperature: 165ºC • Built-in Constant Slope Circuit for Start-up • Built-in Inrush Current Suppression Circuit ···· TYP. 300mA (DFN1216-8: LCON="L") • Reverse Current Protection • Recommended Ceramic Capacitors············· 1.0µF or more *1 For the voltages in 0.05V increments, please refer to SELECTION GUIDE. APPLICATIONS • Power source for portable communication equipments. • Power source for electrical appliances such as cameras, VCRs and camcorders. • Power source for battery-powered equipments. • Local power source for home appliances, printers, scanners, office equipment machines. 1 RP115x NO. EA-274-141205 BLOCK DIAGRAMS RP115Lxx1B VDD CE - Vref + Current Limit Thermal Shutdown Reverce Ditector VDD CE LCON RP115Hxx1B - Vref + Current Limit Thermal Shutdown Reverce Detector VOUT VDD VFB GND CE VOUT VDD VFB GND CE RP115Lxx1D - Vref + Current Limit Thermal Shutdown Reverce Ditector LCON RP115Hxx1D - Vref + Current Limit Thermal Shutdown Reverce Detector VOUT VFB GND VOUT VFB GND Note: The RP115H does not include the LCON pin. The output current limit is fixed at 1A. 2 RP115x NO. EA-274-141205 SELECTION GUIDE The output voltage, the auto-discharge function*2, and the package type for the ICs are user-selectable. Product Name RP115Lxx1∗(y)-E2 RP115Hxx1∗(y)-T1-FE Package DFN1216-8 SOT-89-5 Quantity per Reel 5,000 pcs 1,000 pcs Pb Free Yes Yes Halogen Free Yes Yes xx: Specify the output voltage (VSET) within the range of 0.7V (07) to 4.3V (43) in 0.1V steps. (y): If the output voltage includes the 3rd digit, indicate the digit of 0.01. (0.75V, 1,15V, 1.25V, 1.35V, 1.75V, 1.85V, 2.15V, 2.85V, 2.95V) Ex. If the output voltage is 0.75V, RP115x071∗5 1.15V, RP115x111∗5 1.25V, RP115x121∗5 1.35V, RP115x131∗5 1.75V, RP115x171∗5 1.85V, RP115x181∗5 2.15V, RP115x211∗5 2.85V, RP115x281∗5 2.95V, RP115x291∗5 ∗: Specify the version with auto-discharge function or without auto-discharge function. (B) without auto-discharge function (D) with auto-discharge function *2 Auto-discharge function quickly lowers the output voltage to 0V by releasing the electrical charge in the external capacitor when the chip enable signal is switched from the active mode to the standby mode. 3 RP115x NO. EA-274-141205 PIN CONFIGURATIONS DFN1216-8 Top View 87 65 Bottom View 5 6 78 ∗3 12 3 4 4 32 1 SOT-89-5 54 12 3 PIN DESCRIPTION RP115L: DFN1216-8*3 Pin No Symbol Pin Description 1 VOUT*4 Output Pin 2 VOUT*4 Output Pin 3 LCON Output Current Limit Alternate Pin (“H”=1A, “L”=500mA) 4 VFB*4 Feedback Pin 5 GND Ground Pin 6 CE Chip Enable Pin 7 VDD*5 Input Pin 8 VDD*5 Input Pin *3 The exposed tab on the bottom of the package enhances thermal performance and is ele.


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