R1161x Series
Low Voltage 300mA LDO with ECO pin
No.EK-111-091101 CMOS LDO Regulator
The R1161x Series are CMOS-based LDO regulators with ECO pin featuring 300mA output. By inputting control signals from the ECO
pin, the mode of the regula tor c an be switched to low power mode or fast resp onse mo de, t hus makin g b oth a ctive and sleep modes
available for the system. The CE pin can switch the regulator into standby mode.
FEATURES
• Supply Current (ISS1)∗·················Typ. 60μA (Fast mode, VIN=SET VOUT+1V)
• Supply Current (ISS2)∗·················Typ. 4.5μA
(
Low power mode, same as above
)
• Standby Current (Istandby) ············Typ. 0.1μA (Same as above, in standby)
• Dropout Voltage (VDIF)∗··············Typ. 0.23V (Fast mode,
IOUT=300mA)
Typ. 0.24V (Low power mode, IOUT=300mA)
• Ripple Rejection (RR)················Typ. 65dB (Fast mode, f=1kHz)
• Input Voltage Range (VIN)··········1.4V to 6.0V
• Output Voltage Range (VOUT)·····0.8V to 3.3V (internally fixed)
• Output Voltage Accuracy ················± 2% (Fast mode )
± 3% (Low power mode)
• Temp. coeff. of Output Voltage ·······Typ. ± 100ppm/°C
• Line Regulation·······························Typ. 0.01%/V (Fast mode)
• Fold-back Protection Circuit············Current limit Typ. 50mA
• Auto-Discharge function ·················D Version
• Packages········································SON-6, SOT-23-5, HSON-6
• Ceramic capacitors can be used. ···1μF or more (VOUT
>
=
1.0V)
∗) at VOUT=2.8V
BLOCK DIAGRAMS
R1161xxxxA
(CE pin "L" active) R1161xxxxB
(CE pin "H" active) R1161xxxxD
(With Auto-Discharge function)
V
DD
GND
V
OUT
ECO
Vref
Current
Limit
CE
V
DD
CE GND
V
OUT
ECO
Vref
Current
Limit
V
DD
CE GND
V
OUT
ECO
Vref
Current
Limit
SELECTION GUIDES
Package Quantity per Reel Part No.
SON-6 3,000 pcs R1161D
.
xx
.
1
.
∗
-TR-F
SOT-23-5 3,000 pcs R1161N
.
xx
.
1
.
∗
-TR-F
HSON-6 3,000 pcs R1161D
.
xx
.
2
.
∗
-TR-F
.
xx
.
: Specify the output voltage within the range 0.8V (
.
08
.
) to 3.3V (
.
33
.
)
in 0.1V steps.
.
∗
: Select the polarity of the CE pin from (
.
A
.
) "L" active, (
.
B
.
) "H" active
or (
.
D
.
) "H" active with auto-discharge function.
PACKAGES (Top View) TYPICAL CHARACTERISTIC
SON-6 SOT-23-5 HSON-6
6 5 4
1 2 3
∗
1 3
5 4
2
1 3
6 4
2
5
∗
1 VDD
2 NC
3 VOUT
4 ECO
5 GND
6 CE or CE
1 VDD
2 GND
3 CE or CE
4 ECO
5 VOUT
1 VDD
2 NC
3 VOUT
4 ECO
5 GND
6 CE or CE
R1161x26xx Dropout Voltage vs. Output Current
(Fast Response Mode)
0 50 100 150 200 250 300
Dropout Voltage V
DIF
(V)
Output Current I
OUT
(mA)
ECO=H
85°C
25°C
-40°C
0
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40
∗) The tab and tab suspension leads on back side are substrate level (GND).
APPLICATIONS
• Power source for hand-held communication equipment, cameras, and VCRs
• Very stable voltage reference • Power source for battery-powered equipment
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