ETA5055
Ultra-High PSRR, Ultra-Low Iq, 500mA LDO for RF and Analog Circuits
DESCRIPTION
FEATURES
ETA5055 is a low-dropout (LDO) linear voltage
regulator that features ultra-high power supply
rejection ratio (PSRR), ultra-low quiescent current,
fast start-up, and excellent line and load transient
responses. Its PSRR can be as high as 102dB at
1.2V output. Therefore, ETA5055 is an ideal power
supply for noise-sensitive applications such as RF
transmissions, cellphones, CMOS sensors and
audios etc.
ETA5055 is available in DFN1X1-4, DFN2x2-6,
SOT23-5, and CSP-4 packages.
Ultra-High PSRR up to 102dB
Typ. 94dB at 1KHz
Ultra-Low Quiescent Current: 4.5uA
500mA Output Current
Ultra-Low Dropout Voltage
Stable with a Wide Range of Ceramic
Capacitor, Larger than 1μF
Excellent Load and Line Transient Response
RoHS Compliant
APPLICATIONS
RF Power
Smartphones, Tablets
Cameras, DVRs, STB
TYPICAL APPLICATION
IN
VIN
1uF
OUT
ETA5055
VOUT
1uF
EN
EN
GND
ORDERING
INFORMATION
PART No.
PACKAGE
TOP MARK
Pcs/Reel
ETA5055VXXXDS2F
SOT23-5
PPYW
3000
ETA5055VXXXDD2G
DFN2x2-6
PPYW
3000
ETA5055VXXXDD1E
DFN1x1-4
PP
YW
10000
ETA5055VXXXDF1E
DFN1x1-4
PP
YW
10000
ETA5055VXXXDCNE
CSP-4
P
10000
XXX: voltage code
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ETA5055 Rev2.1
e.g., 120=1.2V
1
PP/P: product code
YW: data code
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ETA5055
PIN CONFIGURATION
ABSOLUTE MAXIMUM RATINGS
(Note: Exceeding these limits may damage the device. Exposure to absolute
maximum rating conditions for long periods may affect device reliability.)
OUT
1
4
IN
3
EN
IN
1
GND
2
EN
3
5
OUT
4
NC
IN, EN, OUT Voltage.................................–0.3V to 6V
Operating Temperature Range …...……–40° C to 85° C
Storage Temperature Range …...….…–55° C to 150° C
Thermal Resistance
JA
JC
CSP-4………..……….........45…......................... ° C/W
SOT23-5…………..…........180….......90............. ° C/W
DFN1x1-4…………............120….......60............. ° C/W
DFN2x2-6…………….........80…........30............. °C/W
Lead Temperature (Soldering 10sec) ……....…..260° C
ESD HBM (Human Body Mode)…………..….…….4KV
ESD CDM (Charged Device Mode)……….……….1KV
ETA5055
GND
2
ETA5055
DFN1x1-4
SOT23-5
OUT
1
NC
2
GND
3
ETA5055
GND
6
IN
5
NC
A
OUT
GND
ETA5055
EN
4
2
1
B
DFN2x2-6
Top View
Not in Scale
IN
EN
CSP-4
ELECTRICAL CHARACTERISTICS
(VIN = VOUT+1V, CIN=1µ F, COUT=1µ F unless otherwise specified. Typical values are at TA = 25° C.)
PARAMETER
Input Voltage Range (1)
Quiescent Current
Quiescent Current
Shutdown Current
Dropout Voltage
Continuous Output Current
Output Current Limit
Output Foldback Current Limit
Line Regulation
Load Regulation
Output Voltage Range
Output Voltage Accuracy
Power Supply Rejection Ratio
Start-up Time
EN pin input Logic Low
EN pin input Logic High
Discharge Resistance
Thermal Shutdown
CONDITIONS
MIN
1.8
IOUT=0mA, VEN=VIN
IOUT=0mA, Dropout
VEN = 0V, 1.8V ≤ VIN ≤ 5.5V
IOUT =200mA, VOUT=2.8V
IOUT =200mA, VOUT=3.3V (CSP-4)
TYP
MAX
5.5
4.5
10
1
130
90
500
VOUT = 95%
VOUT = 0V
VOUT + 1V ≤ VIN ≤ 5.5V
1mA ≤ IOUT ≤ 200 mA
Available in 100mV steps
IOUT =30mA, VOUT>1.8V
Freq = 100Hz, IOUT = 20mA
Freq = 1KHz, IOUT = 20mA
540
800
400
0.2
15
1.1
-2
3.6
2
96
94
100
1.8V ≤ VIN ≤ 5.5V
1.8V ≤ VIN ≤ 5.5V
VIN=2.8V, VEN=0V
Rising, IOUT>1mA, Hysteresis =40° C
Rising, IOUT=0mA, Hysteresis =40° C
dB
0.4
0.9
90
140
135
UNIT
V
µA
µA
µA
mV
mV
mA
mA
mA
%/V
mV
V
%
µs
V
V
Ω
°C
°C
(1): Minimum VIN is 1.8V or VOUT + VDROPOUT, whichever is greater.
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ETA5055 Rev2.1
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ETA5055
PIN DESCRIPTION
SOT23-5
PIN#
CSP-4 DFN1x1-4 DFN2x2-6
NAME
PIN#
PIN#
PIN#
1
2
A2
B1
4
2
6
3
IN
GND
3
B2
3
4
EN
4
5
NA
A1
NA
1
2, 5
1
NC
OUT
DESCRIPTION
Input supply pin
Ground pin
Enable pin. Drive it high to enable IC, drive it low to
disable IC.
Not Connected
Output of regulator pin
TYPICAL CHARACTERISTICS
(Typical values are at TA = 25oC unless otherwise specified.)
Line Regulation
Load Regulation
0.6%
0.6%
Vout=1.8V
Vout=1.8V
0.4%
0.2%
Line Regulation
Load Regulation
0.4%
0.0%
-0.2%
0.2%
0.0%
-0.2%
-0.4%
Iout=0mA
-0.4%
Vin=2.5V
Iout=100mA
-0.6%
-0.6%
0
0.1
0.2
0.3
0.4
0.5
2.5
3
3.5
Load Regulation
4.5
5
5.5
Line Regulation
2.0%
2.0%
Vout=2.8V
Vout=2.8V
1.0%
Line Regulation
1.2%
Load Regulation
4
Vin(V)
Iout(A)
0.4%
-0.4%
0.0%
-1.0%
Iout=0mA
-2.0%
-1.2%
Vin=3.3V
Iout=100mA
-3.0%
-2.0%
0
0.1
0.2
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ETA5055 Rev2.1
Iout(A)
0.3
0.4
0.5
3
2.5
3
3.5
4
4.5
5
5.5
Vin(V)
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ETA5055
TYPICAL CHARACTERISTICS Cont’d
(Typical values are at TA = 25oC unless otherwise specified.)
Line Regulation
Load Regulation
0.4%
0.6%
Vout=3.0V
Vout=3.0V
0.2%
Line Regulation
Load Regulation
0.4%
0.2%
0.0%
-0.2%
0.0%
-0.2%
-0.4%
Iout=0mA
Vin=3.3V
Iout=100mA
-0.4%
-0.6%
0
0.1
0.2
Iout(A)
0.3
0.4
3
0.5
3.5
4
Vin(V)
4.5
5
5.5
Line Regulation
Load Regulation
0.4%
0.6%
Vout=3.3V
Vout=3.3V
0.4%
Line Regulation
Load Regulation
0.2%
0.2%
0.0%
-0.2%
0.0%
Iout=0mA
-0.2%
-0.4%
Vin=3.8V
Iout=100mA
-0.6%
-0.4%
0
0.1
0.2
0.3
0.4
0.5
3.5
Iout(A)
4
Iq Vs. Vin
4.5
Vin(V)
5
Vdropout Vs. Iout
12
0.3
Vout=3.3V,Iout=0mA
10
0.25
8
0.2
Vdropout(V)
Iq(uA)
5.5
6
4
Vout=3.3V
0.15
0.1
0.05
2
Iq
0
0
0
1
2
3
4
5
6
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ETA5055 Rev2.1
0
100
200
300
400
500
Iout(mA)
Vin(V)
4
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ETA5055
TYPICAL CHARACTERISTICS Cont’d
(Typical values are at TA = 25oC unless otherwise specified.)
Vdropout Vs. Iout
Vdropout Vs. Iout
0.5
0.4
0.35
Vout=1.8V
Vout=2.8V
0.4
Vdropout(V)
Vdropout(V)
0.3
0.25
0.2
0.15
0.1
0.3
0.2
0.1
0.05
0
0
0
100
200
300
400
500
0
100
200
Iout(mA)
300
400
PSRR Vs. Freq.
Vdropout Vs. Iout (CSP-4 Package)
110
0.25
100
Vout=1.2V
90
Vout=3.3V
0.2
500
Iout(mA)
PSRR(dB)
Vdropout(V)
80
0.15
0.1
70
60
50
40
Iout=10mA
Iout=20mA
Iout=100mA
Iout=250mA
30
0.05
20
10
0
0
0
0.1
0.2
Iout(A)
0.3
0.4
0.5
0.1
1
PSRR Vs. Freq.
100
1000
PSRR Vs. Freq.
100
100
90
Vout=1.8V
80
70
70
60
60
50
40
30
10
50
40
Iout=10mA
Iout=20mA
Iout=100mA
Iout=250mA
30
Iout=10mA
Iout=20mA
Iout=100mA
Iout=250mA
20
Vout=3.3V
90
80
PSRR(dB)
PSRR(dB)
10
Frequency(KHz)
20
10
0
0
0.1
1
10
Frequency(KHz)
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ETA5055 Rev2.1
100
1000
5
0.1
1
10
Frequency(KHz)
100
1000
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ETA5055
TYPICAL CHARACTERISTICS Cont’d
(Typical values are at TA = 25oC unless otherwise specified.)
Load Transient Response
Vin=2.8V,Vout=1.8V,Iout=1mA to 250mA
Load Transient Response
Vin=2.8V,Vout=1.8V,Iout=250mA to 1mA
Vout
Vout
Iout
Iout
10mV/div
200mA/div
10mV/div
Load Transient Response
Vin=5V,Vout=3.3V,Iout=1mA to 250mA
200mA/div
Load Transient Response
Vin=5V,Vout=3.3V,Iout=250mA to 1mA
Vout
Vout
Iout
Iout
20mV/div
100mA/div
20mV/div
Line Transient Response
Vin=2.3V-5V,Vout=1.8V,Iout=10mA
Line Transient Response
Vin=3.8V-5V,Vout=3.3V,Iout=10mA
Vout
Vout
Vin
Vin
5mV/div
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ETA5055 Rev2.1
100mA/div
2V/div
10mV/div
6
2V/div
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ETA5055
FUNCTIONAL BLOCK DIAGRAM
VIN
VOUT
90Ω
EN
REGULATOR
OFF
ILIMS
BIAS
BANDGAP
RESISTOR
NETWORK
GND
THERMAL
MONITOR
RES
5pF
FUNCTIONAL DESCRIPTION
The ETA5055 family of LDO regulators has been optimized for application in noise-sensitive equipment.
The device features extremely low dropout voltages, high PSRR, low output noise, low quiescent current,
and enable-input to reduce supply currents to less than 1μA when the regulator is turned off.
Enable Sequence
ETA5055 is enabled when all below conditions happen. Otherwise, ETA5055 is in standby mode.
EN pin voltage above Logic High level
VIN is higher than Under-Voltage-Lock-Out Level.
Junction Temperature is not at Over-Temperature Protection level.
Once all above conditions happen, ETA5055 first enable internal 2.4V regulator, before enable BIAS, and
BANDGAP. Finally, when internal bias ready, ETA5055 enable LDO core.
ETA5055 is completed forced in shutdown mode when EN pin is at below LOGIC_LOW that supply current
is less than 1μA. Otherwise, part only shutdown the VOUT while other circuit still in operation. Once
ETA5055 is in shutdown conditions, Output is discharged by 90Ω resistor.
Output Current Limit and Foldback Current Limit
ETA5055 family features an internal current limit. In normal operation, the ETA5055 limits output current to
approximately 800mA. When current limiting engages, the output voltage scales back linearly until the over
current condition ends.
In case output is in hard short conditions, ETA5055 also features an internal foldback limit that reduces the
output current limit to a lower level, 400mA, then reduce power dissipation ratings of the package.
Over-Temperature Protection
Thermal protection disables the output when the junction temperature rises to approximately 150° C,
allowing the device to cool down. When the junction temperature cools to approximately 120° C, the output
circuitry is again enabled. Depending on power dissipation, thermal resistance, and ambient temperature,
the thermal protection circuit may cycle on and off. This cycling limits regulator dissipation, protecting the
device from damage as a result of overheating.
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ETA5055
PACKAGE OUTLINE
Package: SOT23-5
ETA5055VXXXDS2F
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ETA5055 Rev2.1
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ETA5055
PACKAGE OUTLINE
Package: CSP-4
ETA5055VXXXDCNE
RECOMMENDED LAND PATTERN
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ETA5055 Rev2.1
9
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ETA5055
Package: DFN1x1-4
From assembly house1: ETA5055VXXXDF1E
3
4
2
1
From assembly house2: ETA5055VXXXDD1E
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ETA5055 Rev2.1
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ETA5055
Package: DFN2x2-6
ETA5055VXXXDD2G
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ETA5055 Rev2.1
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ETA5055
AVAILABLE PART NUMBER
Part Description
Part Number
Package
Mark
Pcs/Reel
1.2V With Discharge CSP-4
ETA5055V120DCNE
CSP-4
B
10000
1.8V With Discharge CSP-4
ETA5055V180DCNE
CSP-4
D
10000
2.8V With Discharge CSP-4
ETA5055V280DCNE
CSP-4
F
10000
3.3V With Discharge CSP-4
ETA5055V330DCNE
CSP-4
K
10000
1.1V with Discharge DFN1x1-4
ETA5055V110DD1E
DFN1x1-4
ev
10000
1.2V with Discharge DFN1x1-4
ETA5055V120DD1E
DFN1x1-4
YW
CD
10000
YW
1.5V with Discharge DFN1x1-4
ETA5055V150DD1E
DFN1x1-4
CN
10000
YW
1.8V with Discharge DFN1x1-4
ETA5055V180DD1E
DFN1x1-4
CX
10000
YW
2.8V with Discharge DFN1x1-4
ETA5055V280DD1E
DFN1x1-4
C8
10000
YW
2.9V with Discharge DFN1x1-4
ETA5055V290DD1E
DFN1x1-4
3.0V with Discharge DFN1x1-4
ETA5055V300DD1E
DFN1x1-4
eq
10000
YW
Cy
10000
YW
3.3V with Discharge DFN1x1-4
ETA5055V330DD1E
DFN1x1-4
Ck
10000
YW
1.1V with Discharge DFN1x1-4
ETA5055V110DF1E
DFN1x1-4
ev
10000
YW
1.2V with Discharge DFN1x1-4
ETA5055V120DF1E
DFN1x1-4
CD
10000
YW
1.5V with Discharge DFN1x1-4
ETA5055V150DF1E
DFN1x1-4
1.8V with Discharge DFN1x1-4
ETA5055V180DF1E
DFN1x1-4
CN
10000
YW
CX
10000
YW
2.8V with Discharge DFN1x1-4
ETA5055V280DF1E
DFN1x1-4
C8
10000
YW
2.9V with Discharge DFN1x1-4
ETA5055V290DF1E
DFN1x1-4
eq
10000
YW
3.0V with Discharge DFN1x1-4
ETA5055V300DF1E
DFN1x1-4
Cy
10000
YW
3.3V with Discharge DFN1x1-4
ETA5055V330DF1E
DFN1x1-4
Ck
10000
1.1V with Discharge SOT23-5
ETA5055V110DS2F
SOT23-5
evYW
3000
1.2V with Discharge SOT23-5
ETA5055V120DS2F
SOT23-5
WDYW
3000
1.5V with Discharge SOT23-5
ETA5055V150DS2F
SOT23-5
WNYW
3000
1.8V with Discharge SOT23-5
ETA5055V180DS2F
SOT23-5
WXYW
3000
2.5V with Discharge SOT23-5
ETA5055V250DS2F
SOT23-5
WJ∣YW
3000
YW
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ETA5055
Part Description
Part Number
Package
Mark
Pcs/Reel
2.8V with Discharge SOT23-5
ETA5055V280DS2F
SOT23-5
W8YW
3000
2.9V with Discharge SOT23-5
ETA5055V290DS2F
SOT23-5
WS∣YW
3000
3.0V with Discharge SOT23-5
ETA5055V300DS2F
SOT23-5
WyYW
3000
3.3V with Discharge SOT23-5
ETA5055V330DS2F
SOT23-5
WkYW
3000
1.1V with Discharge DFN2X2-6
ETA5055V110DD2G
DFN2X2-6
evYW
3000
1.2V with Discharge DFN2X2-6
ETA5055V120DD2G
DFN2X2-6
CDYW
3000
1.5V with Discharge DFN2X2-6
ETA5055V150DD2G
DFN2X2-6
CNYW
3000
1.8V with Discharge DFN2X2-6
ETA5055V180DD2G
DFN2X2-6
CXYW
3000
2.5V with Discharge DFN2X2-6
ETA5055V250DD2G
DFN2X2-6
CJ∣YW
3000
2.8V with Discharge DFN2X2-6
ETA5055V280DD2G
DFN2X2-6
C8YW
3000
3.0V with Discharge DFN2X2-6
ETA5055V300DD2G
DFN2X2-6
CyYW
3000
3.3V with Discharge DFN2X2-6
ETA5055V330DD2G
DFN2X2-6
CkYW
3000
TAPE AND REEL INFORMATION
Device
ETA5055VXXXDCNE
Package
Type
CSP-4
Reel
Pins
SPQ
Reel
Diameter Width W1
(mm)
(mm)
A0
B0
K0
P1
W
Pin1
(mm) (mm) (mm) (mm) (mm) Quadrant
4
10000
178
9.5
0.45
0.45
0.34
2
8
Q1
ETA5055VXXXDD1E DFN1x1-4
4
10000
180
9.5
1.16
1.16
0.5
2
8
Q1
ETA5055VXXXDF1E
DFN1x1-4
4
10000
180
9.5
1.16
1.16
0.5
2
8
Q1
ETA5055VXXXDD2G DFN2x2-6
6
3000
180
9.5
2.3
2.3
1.1
4
8
Q1
ETA5055VXXXDS2F
5
3000
180
9.5
3.17
3.23
1.37
4
8
Q3
SOT23-5
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