Eutech EUP7913 300ma low-noise ldo without bypass capacitor Datasheet

EUP7913/A
300mA Low-Noise LDO
Without Bypass Capacitor
DESCRIPTION
FEATURES
The EUP7913/A is an efficient CMOS low dropout
(LDO) voltage regulator optimized for ultra-low-noise
applications. It offers high output accuracy, extremely
low dropout voltage, low ground current and fast
start-up time. The EUP7913/A provides a very low
noise output without a bypass capacitor, ideal for RF
applications where a clean supply voltage source is
required. Specifically designed for handheld and
battery-powered devices, the EUP7913/A provides a
TTL-logic-compatible enable pin. When the
EUP7913/A is disabled, power consumption drops
nearly to zero. Key features include current limit,
thermal shutdown and faster transient response.
The EUP7913/A works with low-ESR ceramic
capacitors. Available in the SOT23-3 or SOT23-5
space saving package which reduces the amount of
board space necessary for power applications. The
EUP7913/A offers wide fixed output voltage versions.
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2.5V to 5.5V Input Voltage Range
30µV(rms) Output Noise
200mV Dropout @ 300mA
70dB PSRR at 1kHz No Bypass Capacitor
Low 30µA Ground Current
Guaranteed 300mA Output Current
Stable with a 1µF Ceramic Output Capacitor When
VOUT ≥ 1.5V, or 2.2µF when VOUT<1.5V
Excellent Load/Line Transient
Thermal Shutdown and Current Limit
Protection
Available 1.2V to 3.6V fixed output voltages
(50mV increments)
Space-Saving SOT23-3 & SOT23-5 Package
RoHS Compliant and 100% Lead (Pb)-Free
APPLICATIONS
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Block Diagram
Figure 1.
DS7913/A Ver1.1 Dec. 2008
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Cellular Phones
Camera Modules
PDA and Palmtop Computers
Consumer/Personal Electronics
EUP7913/A
Typical Application Circuit
Figure 2. EUP7913 Fixed-Voltage Regulator
Figure 3. EUP7913A Fixed-Voltage LDO Regulator
DS7913/A Ver1.1 Dec. 2008
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EUP7913/A
Pin Configurations
Package
Type
Pin
Package
Type
Configurations
Pin
(Top View)
Configurations
(Top View)
SOT23-3
SOT23-5
Pin Description
NAME
EUP7913
(SOT23-3)
EUP7913A
(SOT23-5)
EN
-
3
GND
1
2
Active chip for logic high. When EN turns logic low, the devices goes
shutdown.
Ground pin
OUT
2
5
Output voltage of the LDO
IN
3
1
Input voltage of the LDO
NC
-
4
No connected
DS7913/A Ver1.1 Dec. 2008
DESCRIPTION
3
EUP7913/A
Ordering Information
Order Number
Package Type
Marking
Operating Temperature Range
EUP7913-12VIR1
SOT23-3
DT xxxx
-40 °C to +85°C
EUP7913-15VIR1
SOT23-3
DC xxxx
-40 °C to +85°C
EUP7913-18VIR1
SOT23-3
DD xxxx
-40 °C to +85°C
EUP7913-25VIR1
SOT23-3
DB xxxx
-40 °C to +85°C
EUP7913-28VIR1
SOT23-3
DE xxxx
-40 °C to +85°C
EUP7913-285VIR1
SOT23-3
DF xxxx
-40 °C to +85°C
EUP7913-30VIR1
SOT23-3
DG xxxx
-40 °C to +85°C
EUP7913-33VIR1
SOT23-3
DH xxxx
-40 °C to +85°C
EUP7913A-12VIR1
SOT23-5
EUP7913A-15VIR1
SOT23-5
EUP7913A-18VIR1
SOT23-5
EUP7913A-25VIR1
SOT23-5
EUP7913A-28VIR1
SOT23-5
EUP7913A-285VIR1
SOT23-5
EUP7913A-30VIR1
SOT23-5
EUP7913A-33VIR1
SOT23-5
EUP7913A-475VIR1
SOT23-5
xxxxx
AF1T
xxxxx
AF1C
xxxxx
AF1D
xxxxx
AF1B
xxxxx
AF1E
xxxxx
AF1F
xxxxx
AF1G
xxxxx
AF1H
xxxxx
AF1I
EUP7913/A- □□□ □ □ □ □
Lead Free Code
1: Lead Free 0: Lead
Packing
R: Tape & Reel
Operating temperature range
I: Industry Standard
Package Type
V: SOT23
Output Voltage
12: 1.2V
15: 1.5V
18: 1.8V
25: 2.5V
28: 2.8V
285: 2.85V
30: 3.0V
33: 3.3V
475: 4.75V
DS7913/A Ver1.1 Dec. 2008
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-40 °C to +85°C
-40 °C to +85°C
-40 °C to +85°C
-40 °C to +85°C
-40 °C to +85°C
-40 °C to +85°C
-40 °C to +85°C
-40 °C to +85°C
-40 °C to +85°C
EUP7913/A
Absolute Maximum Ratings (1)
„
„
„
„
„
„
„
IN,OUT and EN to GND-----------------------------------------------------------0.3V to 6V
Junction Temperature ---------------------------------------------------------------------- 150°C
Storage Temperature Range ---------------------------------------------------- -65°C to +150°C
Lead Temperature -------------------------------------------------------------------------- 260°C
Thermal Resistance θJA (SOT23-3) -----------------------------------------------------250°C/W
Thermal Resistance θJA (SOT23-5) -----------------------------------------------------220°C/W
ESD Rating
Human Body Model --------------------------------------------------------------------- ±2kV
Recommend Operating Conditions (2)
„
„
„
VIN ----------------------------------------------------------------------------------- 2.5V to 5.5V
VEN ------------------------------------------------------------------------------------ 0V to 5.5V
Operating Temperature Range ------------------------------------------------ -40°C to +85°C
Note (1): Stress beyond those listed under “Absolute Maximum Ratings” may damage the device.
Note (2): The device is not guaranteed to function outside the recommended operating conditions.
Electrical Characteristics
Conditions: VIN=VOUT+0.5V or 2.5V whichever is greater, VEN=VIN,CIN=COUT=1uF,TA= -40°C to +85°C
,Unless otherwise specified.
Symbol
Parameter
Conditions
Input Voltage
∆VOUT
Output Voltage Accuracy
IOUT=1mA to 30mA,TA= +25℃
IOUT=1mA to 30mA,
TA=-40℃ to +85℃
Min
EUP7913
Typ
Max.
2.5
-2
5.5
2
-3.0
3.0
IOUTMAX Maximum Output Current
300
ILIMIT Current Limit
VOUT=VOUT(nom) × 90%
550
VOUT ≥ 3V , IOUT=300mA
180
200
VDROP Dropout Voltage (Note3)
2.4 ≤ VOUT ≤ 3V, IOUT=300mA
200
300
IQ
Quiescent Current
No Load
30
50
VLNR
Line Regulation
VIN=(VOUT+0.5V) to 5.5V, IOUT=10mA
0.02
0.15
VLDR
Load Regulation
1mA ≤ IOUT ≤ 300mA
15
30
0.3
1.5
ISHDN Shutdown Supply Current VEN=0,TA=+25℃ (EUP7913A)
VIN=(VOUT+1V)
70
f=1kHz, ILOAD=10mA
Power Supply Ripple
PSRR
VIN=(VOUT+1V) f=10kHz, ILOAD=10mA
60
Rejection
VIN=(VOUT+1V) f=100kHz,
45
ILOAD=10mA
Output Noise Voltage
f=10Hz~100kHz, VOUT=1.5V,
30
No Load
(RMS)
Turn-on Time (Note4)
RLOAD=50Ω,TA=+25℃
100
VENL
VENL (EN logic low)
VIN=2.5V to 5.5V (EUP7913A)
0.4
VENH VENH (EN logic high)
VIN=2.5V to 5.5V (EUP7913A)
1.5
VEN Input Bias Current
VIN=5.5V, VEN=0 or 5.5V (EUP7913A)
-1
1
RDIS Output Discharge Switch VEN=0,VIN=3.6V
500
Thermal Shutdown
TSD
155
Temperature
Thermal Shutdown
∆TSD
15
Hysteresis
Rdischarge VOUT Discharge Resistance VEN=0 (EUP7913A)
500
Note (3): Dropout is defined as VIN-VOUT when VOUT is 100mV below the value of VOUT for VIN=VOUT+0.5V
Note (4): Time needed for VOUT to reach 90% of final value.
DS7913/A Ver1.1 Dec. 2008
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Unit
V
%
mA
mA
mV
µA
%/V
mV
µA
dB
µV
µs
V
V
µA
Ω
°C
°C
Ω
EUP7913/A
Typical Characteristics (CIN=COUT=2.2µF)
DS7913/A Ver1.1 Dec. 2008
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EUP7913/A
Typical Characteristics (continued)
Time (200µs/div)
Time (100µs/div)
Time (200µs/div)
Time (40µs/div)
DS7913/A Ver1.1 Dec. 2008
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EUP7913/A
Typical Characteristics (continued)
Time (100µs/div)
DS7913/A Ver1.1 Dec. 2008
Time (100µs/div)
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EUP7913/A
Application Note
Input Capacitor
An input capacitance of 1µF or higher is required between the EUP7913/A input pin IN and ground (the amount of
the capacitance may be increased without limit). This capacitor must be located a distance of not more than 1cm
from the input pin and returned to a clean analog ground. Any good quality ceramic, tantalum, or film capacitor
may be used at the input. If a tantalum capacitor is used at the input, it must be guaranteed by the manufacturer to
have a surge current rating sufficient for the application. There are no requirements for the ESR on the input
capacitor, but tolerance and temperature coefficient must be considered when selecting the capacitor to ensure the
capacitance will be 1µF over the entire operating temperature range.
Output Capacitor
The EUP7913/A is designed specifically to work with very small ceramic output capacitors. A ceramic capacitor
(temperature characteristics X7R or X5R) in 1µF to 10µF range with 5mΩ to 500mΩ ESR range is suitable in the
EUP7913/A application circuit. The output capacitor must meet the requirement for minimum amount of
capacitance to maintain good loop stability and phase margin. See the table below.
Output Voltage
Output Capacitor Minimum Value
1.2~1.45
2.2uF
1.5~3.6
1uF
No-Load Stability
The EUP7913/A is stable without any external load. This is specially important for CMOS RAM keep-alive
applications.
On/Off Input Operation
The EUP7913A is turned off by pulling the EN pin low, and turned on by pulling it high. If this pin is floating, the
regulator will always be on .To assure proper operation, the signal source used to drive the VEN input must be able
to swing above and below the specified turn-on/off voltage thresholds listed in the Electrical Characteristics.
When EN is logic low, output is internally discharged to GND through a 500 resistor.
DS7913/A Ver1.1 Dec. 2008
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EUP7913/A
Packaging Information
SOT23-3
SYMBOLS
MILLIMETERS
INCHES
MIN.
MAX.
MIN.
MAX.
A
-
1.30
-
0.052
A1
0.00
0.15
0.000
0.006
D
2.90
0.114
E1
1.60
0.063
E
2.60
3.00
0.102
0.118
L
0.30
0.60
0.012
0.024
b
0.30
0.50
0.012
0.020
e
DS7913/A Ver1.1 Dec. 2008
0.95
0.037
10
EUP7913/A
SOT23-5
SYMBOLS
MILLIMETERS
INCHES
MIN.
MAX.
MIN.
MAX.
A
-
1.30
-
0.052
A1
0.00
0.15
0.000
0.006
D
2.90
0.114
E1
1.60
0.063
E
2.60
3.00
0.102
0.118
L
0.30
0.60
0.012
0.024
b
0.30
0.50
0.012
0.020
e
DS7913/A Ver1.1 Dec. 2008
0.95
0.037
11
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