RP115x Series
Low On Resistance/ Low Voltage 1ch 500mA/ 1.0A Alternative LDO
NO.EA-274-121129
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, I
OUT
=1.0A, V
SET
=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: I
OUT
=1.0A, V
SET
=1.2 V)
•
•
•
•
•
•
•
•
•
•
•
•
•
*1
TYP. 0.235V (SOT-89-5: I
OUT
=1.0A, V
SET
=1.2 V)
Ripple Rejection··············································· TYP. 80dB (f=1kHz, V
SET
≤
1.8V)
TYP. 75dB (f=1kHz, V
SET
> 1.8V)
Output Voltage Accuracy ·································
±1.0%
(V
SET
≥
1.8V)
Output Voltage Temperature Coefficient·········· TYP.
±30ppm/
ºC (V
SET
≥
1.8V)
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
For the voltages in 0.05V increments, please refer to
MARK INFORMATIONS.
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
BLOCK DIAGRAMS
RP115Lxx1B
V
DD
V
OUT
V
DD
RP115Lxx1D
V
OU T
-
Vre f
+
Cu rre n t L im it
T he rm a l S hu td o wn
R eve rce
Dite cto r
V
FB
Vref
-
+
Current Limit
T hermal Shutdown
R everce
Ditector
V
FB
CE
GN D
CE
GND
LCON
LCON
RP115Hxx1B
V
DD
V
OUT
RP115Hxx1D
V
DD
V
OU T
-
Vre f
+
Cu rre n t L im it
T he rm a l S hu td o wn
R eve rce
De te ct o r
V
FB
Vref
-
+
Current Limit
T hermal Shutdown
R everce
Detector
V
FB
CE
GN D
CE
GND
Notes: The RP115H does not include the LCON pin. The output current limit is fixed at 1A.
2
RP115x
SELECTION GUIDE
The output voltage, the auto-discharge function
*2
, and the package type for the ICs are user-selectable options.
Product Name
RP115Lxx1∗(y)-E2
RP115Hxx1∗(y)-T1-FE
Package
DFN1216-8
SOT-89-5
Quantity per Reel
5,000
1,000
Pb Free
Yes
Yes
Halogen Free
Yes
Yes
xx: Specify the output voltage (V
SET
) 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, 1.85V, 2.85V)
Ex. If the output voltage is 1.25V, RP115x121∗5
If the output voltage is 1.85V, RP115x181∗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
PIN CONFIGURATIONS
DFN1216-8
Top View
8
7
6
5
SOT-89-5
6
7
8
Bottom View
5
5
4
∗
3
1
2
3
4
4
3
2
1
1
2
3
PIN DESCRIPTION
RP115L: DFN1216-8
*3
Pin No
Symbol
Pin Description
1
2
3
4
5
6
7
8
*3
V
OUT*4
V
OUT*4
LCON
V
FB*4
GND
CE
V
DD*5
V
DD*5
Output Pin
Output Pin
Output Current Limit Alternate Pin (“H”=1A, “L”=500mA)
Feedback Pin
Ground Pin
Chip Enable Pin
Input Pin
Input Pin
The exposed tab on the bottom of the package enhances thermal performance and is electrically connected to
GND (substrate level). It is recommended that the exposed tab be connected to the ground plane on the board or
otherwise be left open.
*4
The V
OUT
pins and the V
FB
pin must be wired together when mouting on the board.
*5
The V
DD
pins must be wired together when mouting on the board.
RP115H: SOT-89-5
Pin No
Symbol
Pin Description
1
2
3
4
5
*6
V
FB*6
GND
CE
V
DD
V
OUT*6
Feedback Pin
Ground Pin
Chip Enable Pin
Input Pin
Output Pin
The V
OUT
pin and the V
FB
pin must be wired together when mouting on the board.
Notes: Output Current Limit is fixed at 1A.
4
RP115x
ABSOLUTE MAXIMUM RATINGS
Symbol
Item
Rating
Unit
V
IN
V
CE
V
LCON
V
OUT
P
D
Ta
Tstg
*7
Input Voltage
Input Voltage (CE Pin)
Input Voltage (LCON Pin)
Output Voltage
Power Dissipation (Standard Land Pattern)
*7
Operating Temperature Range
Storage Temperature Range
6.0
-0.3 to 6.0
-0.3 to 6.0
-0.3 to 6.0
DFN1216-8
SOT-89-5
-40 to +85
-55 to +125
625
900
V
V
V
V
mW
ºC
ºC
For Power Dissipation and Standard Land Pattern, please refer to
PACKAGE INFORMATION
.
ABSOLUTE MAXIMUM RATINGS
Electronic and mechanical stress momentarily exceeded absolute maximum ratings may cause the permanent
damages and may degrade the lifetime and safety for both device and system using the device in the field. The
functional operation at or over these absolute maximum ratings is not assured.
RECOMMENDED OPERATING CONDITIONS (ELECTRICAL CHARACTERISTICS)
All of electronic equipment should be designed that the mounted semiconductor devices operate within the
recommended operating conditions. The semiconductor devices cannot operate normally over the recommended
operating conditions, even if when they are used over such conditions by momentary electronic noise or surge. And
the semiconductor devices may receive serious damage when they continue to operate over the recommended
operating conditions.
5
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