Document
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.