RP131x Series
1A LDO
The RP131x Series are CMOS-based LDO regulators featuring 1A output with low on-resistance. The CMOS process provides both
large output current and low supply current. The dropout voltage is significantly lower than bipolar regulators. The RP131x handles
low voltage with an input voltage from 1.6V and an output voltage from 0.8V. Accordingly, the device supports highly integrated, low
voltage-driven LSI as a rear stage of the DC/DC converter. The CE pin can switch the regulator into standby mode. In addition to a
fold-back protection circuit built into conventional LDO regulators, RP131x has a thermal shutdown circuit and inrush current limit
circuit. Ceramic capacitors can be used.
FEATURES
• Supply Current (ISS) ························Typ. 65μA (VIN=6.5V)
• Line Regulation·······························Typ. 0.05%/V
• Fold-back Protection Circuit············Current limit Typ. 250mA
• Inrush Current Limit Circuit·············Typ. 500mA
• Thermal Shutdown Circuit ··············Stops at 165°C.
• Packages········································DFN (PLP)1820-6,
SOT-89-5, HSOP-6J
• Standby Current (Istandby) ·················Typ. 0.15μA (Same as above, CE=“L”)
• Dropout Voltage (VDIF) ····················Typ. 0.5V (IOUT=1A, VOUT=2.8V)
<
• Ripple Rejection (RR)·····················Typ. 70dB (f=1kHz, VOUT 3.3V),
=
Typ. 60dB (f=1kHz, VOUT>3.3V)
• Input Voltage Range (VIN)···············1.6V to 6.5V
• Output Voltage Range (VOUT)··········0.8V to 5.0V (internally fixed)
• Output Voltage Accuracy ················± 1%
TO-252-5-P2
• Ceramic capacitors can be used. ···2.2μF or more (VOUT 3.6V)
=
>
4.7μF or more (VOUT 3.6V)
• Temp. coeff. of Output Voltage ·······Typ. ± 100ppm/°C
(The above shows specification at Topt=25 C. Design assurance value at -40 C Topt 85 C is also available. For details, please refer to the datasheet.)
°
°
°
=
=
BLOCK DIAGRAMS
R131xxx1B
(Without Auto-Discharge function)
R131xxx1D
(With Auto-Discharge function)
V
DD
V
DD
V
OUT
V
OUT
Vref
Vref
Current Limit
Current Limit
Thermal Shutdown
Thermal Shutdown
CE
GND
CE
GND
SELECTION GUIDES
.
xx
.
: Specify the output voltage within the range 0.8V(
in 0.1V steps.
.
08
.
) to 5.0V(
.
50
.
)
Package
DFN(PLP)1820-6
SOT-89-5
HSOP-6J
TO-252-5-P2
Quantity per Reel
Part No.
5,000 pcs
1,000 pcs
1,000 pcs
3,000 pcs
RP131K
.
xx
.
1
.
∗-TR
: Select from (
.
B
.
) without auto-discharge function or
.
∗
RP131H
.
xx
.
1
.
∗-T1-F
(.
D
.
) with auto-discharge function.
RP131S
.
xx
.
1
.
∗-E2-F
RP131J
.
xx
.
1
.
∗-T1-F
PACKAGES (Top View)
TYPICAL CHARACTERISTIC
RP131x331x Dropout Voltage vs. Output Current
DFN
(
PLP
)
1820-6
SOT-89-5
HSOP-6J
TO-252-5-P2
6
5
4
6
5
4
5
4
1.4
85°C
∗
1.2
25°C
1.0
-40°C
0.8
0.6
0.4
0.2
0
1
2
3
1
2
3
1
2
3
1
2
3
4
5
1
1
∗
∗
1
2
3
4
5
6
1
NC
GND
CE
VDD
VOUT
1 VOUT
2
3 NC
4 CE
5
1 VOUT
2
3
4 CE
5 VDD
VOUT
VOUT
GND
CE
VDD
VDD
1
1
1
GND∗
GND∗
GND∗
2
3
4
5
1
1
GND∗
∗
∗
0
100 200 300 400 500 600 700 800 9001000
Output Current IOUT (mA)
1
6 VDD
) The tab is substrate level (GND).
∗
∗1) The VOUT pin, VDD pin and GND pin must be wired each other when it is mounted on board.
APPLICATIONS
• Power source for hand-held communication equipment, cameras, and VCRs • Power source for laptop personal computers and home appliances
• Power source for battery-powered equipment
No.EK-174-091101
CMOS LDO Regulator