RP201x Series
Automatic Mode Shift 150mA LDO
The RP201x Series are CMOS-based automatic mode shift LDO regulators featuring 150mA output. In auto switching mode, the
operation can switch automatically to fast response mode or low power mode of the ECO function according to output current.
(Automatic switching to fast response mode under I
OUT
>8mA conditions or to low power mode under I
OUT
<1mA conditions.) In lower
power mode, supply current is as low as 1μA. In fast response mode, ripple rejection is 70dB and noise is low. By inputting control
signal into the AE pin, the mode of the regulator can be fixed with fast response mode. In addition to SOT-23-5 and SC-88A packages,
a 0.69mm square WLCSP-4-P5 package and a 1.2mm square DFN(PLP)1212-6 are also available.
FEATURES
•
Supply Current (I
SS2
) ··················· Typ. 55μA (Fast mode, V
IN
=SET V
OUT
+1V)
•
Supply Current (I
SS1
) ··················· Typ. 1.5μA (Low power mode, same as above, V
OUT
=2.8V)
•
Standby Current (I
standby
) ············· Typ. 0.1μA (Same as above, CE="L")
•
Dropout Voltage (V
DIF
) ················ Typ. 0.12V (I
OUT
=150mA, V
OUT
=2.8V)
•
Ripple Rejection (RR)················· Typ. 70dB (Fast mode, f=1kHz)
•
Input Voltage Range (V
IN
) ··········· 1.4V to 5.25V
•
Output Voltage Range (V
OUT
)······ 0.8V to 4.0V (internally fixed)
•
Output Voltage Accuracy ············
±
1%
•
Temp. coeff. of Output Voltage ·······Typ.
±
50ppm/°C
•
Line Regulation·······························Typ. 0.02%/V (Fast mode)
•
Fold-back Protection Circuit ···········Current limit Typ. 50mA
•
Auto-Discharge function ·················D Version
•
Packages ········································WLCSP-4-P5, DFN(PLP)1212-6,
•
SC-88A, SOT-23-5
Ceramic capacitor can be used. ·····1μF or more
(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
RP201xxxxB
(Without Auto-Discharge function)
AE
RP201xxxxD
(With Auto-Discharge function)
AE
V
DD
V
OUT
V
DD
V
OUT
Vref
Current Limit
Vref
Current Limit
CE
GND
CE
GND
WLCSP-4-P5 type does not have
.
WLCSP-4-P5 type does not have
.
SELECTION GUIDES
Package
WLCSP-4-P5
DFN(PLP)1212-6
SC-88A
SOT-23-5
Quantity per Reel
5,000 pcs
5,000 pcs
3,000 pcs
3,000 pcs
Part No.
RP201Z.xx.1.
∗
-TR-F
RP201K.xx.1.
∗
-TR
RP201Q.xx.2.
∗
-TR-F
RP201N.xx.1.
∗
-TR-F
.xx.
: Specify the output voltage within the range 0.8V (.08.) to 4.0V (.40.)
in 0.1V steps.
: Select from (.B.) without auto-discharge function or
.∗
(.D.) with auto-discharge function
PACKAGES (Top View)
WLCSP-4-P5 DFN(PLP)1212-6
4
3
6
5
4
TYPICAL CHARACTERISTIC
SOT-23-5
5
4
SC-88A
5
4
RP201x26xx Dropout Voltage vs. Output Current
350
Dropout Voltage V
DIF
(mV)
300
250
200
150
100
50
0
0
85°C
25°C
-40°C
1
2
1
2
3
1
1
2
3
2
3
1
2
3
4
V
DD
CE
GND
V
OUT
1
2
3
4
5
6
AE
GND
CE
V
DD
NC
V
OUT
1
2
3
4
5
AE
GND
V
OUT
V
DD
CE
1
2
3
4
5
V
DD
GND
CE
AE
V
OUT
25
50
75
100 125
Output Current I
OUT
(mA)
150
∗)
WLCSP-4-P5 does not have AE pin.
APPLICATIONS
•
Power source for hand-held communication equipment, camera and VCRs
•
Power source for home appliances and digital home appliance
•
Power source for battery-powered equipment
No.EK-234-091101
150mA CMOS LDO Regulator
RP201x Series
Automatic Mode Shift 150mA LDO Regulator
150mA CMOS LDO Regulator
WHAT IS ECO Function
An increasing number of devices such as mobile phones do not have only talk mode (active mode) and off mode status, but also standby mode
(sleep mode) etc.
However during the active mode and sleep mode the regulator must satisfy very different requirement. The regulators are required to have fast
response and high ripple rejection in the active mode, but consume low supply current in the sleep mode. To satisfy these conflicting requirements,
Ricoh’s regulators include an ECO function that allows switching between fast mode and low power mode.
There are some types of switching between fast mode and low power mode. As RP201x Series are automatic mode shift types, they can switch the
modes automatically depending on system load.
By inputting control signal into the AE pin, the mode of the regulator can be fixed with fast response mode.
Automatic Mode Shift
The regulator automatically switches mode depending on system load.
1μA supply current in low power mode
(Reference value)
80
R1118x
R1118x
RP201x
R1162x
Supply Current I
SS(μA)
(Schematic view)
Fast Response Mode
Ripple Rejection RR(dB)
55
(Low Power Mode)
(Fast Response Mode) (Fast Response Mode) (Fast Response Mode)
70
60
50
RP201x
40
30
20
0
R1162x
(Low Power Mode)
(Low Power Mode)
1
0
Low Power Mode
1
8
Output Current I
OUT
(mA)
∗
To select “H” in AE pin is fixed in fast mode.
∗
To select “L” in AE pin is maintained in Automatic Mode Shift.
10
20
30
40
50
60
70
Supply Current I
SS
(µA)
150mA LDO Regulator Comparison
RP201x
Input voltage Range
1.4V to 5.25V
Output voltage Range
0.8V to 4.0V
Output Voltage Accuracy
±1%
Output Current
150mA
55μA (Fast mode)
Supply Current
1.5μA
(Low power mode)
Standby Current
0.1μA
Ripple Rejection
70dB (Fast mode)
Output Capacitor
1μF
Dropout Voltage (Typ.)
0.12V
(150mA/2.8V)
Line Regulation
0.02%/V
Max.40mV (150mA)
Load regulation
WLCSP-4-P5
DFN(PLP)1212-6
Packages
SC-88A
SOT-23-5
etc.
Automatic Mode Shift
R1162x
2.0V to 6.0V
1.5V to 4.0V
±2%
150mA
70μA (Fast mode)
5.5μA (Low power mode)
0.1μA
70dB (Fast mode)
1μF
0.25V (150mA/2.8V)
0.02%/V
Max.40mV (150mA)
SON1612-6
SOT-23-5
Manual Mode Shift
R1116x
1.8V to 6.0V
1.5V to 4.0V
±1.5%
150mA
10μA
0.1μA
70dB
1μF
0.29V (150mA/2.8V)
0.02%/V
Max.66mV (150mA)
SON1612-6
SOT-23-5
Seemless Type
R1118x
1.4V to 6.0V
0.8V to 4.2V
±1%
150mA
50μA (Fast mode)
5.5μA (Low power mode)
0.1μA
70dB (Fast mode)
1μF
0.27V (300mA/2.8V)
0.02%/V
Max.80mV (150mA)
DFN(PLP)1612-4B
SOT-23-5
Automatic Mode Shift
The currently available information as of November 2009 is provided in this New Product News.
EK-234-091101
Electronics Design Contest
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