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PDF EUP7903-18VIR1 Data sheet ( Hoja de datos )
| Número de pieza | EUP7903-18VIR1 | |
| Descripción | 300mA High PSRR LDO Regulators | |
| Fabricantes | Eutech Microelectronics | |
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EUP7903
300mA High PSRR LDO Regulators
DESCRIPTION
The EUP7903 is a high current, low-dropout (LDO) linear
regulator with fast transient response and high PSRR. It
offers high output accuracy, extremely low dropout voltage,
low quiescent current and fast start-up time.
The EUP7903 is designed to work with low-ESR ceramic
capacitors, reducing the amount of the PCB area necessary
for power applications. Only a 1uF ceramic output capacitor
can make the device stable over the whole load range.
EUP7903 can be externally set either fixed output mode or
adjustable output mode. Connect FB pin to GND to select
the fixed output mode. Its output is one of pre-set values:
1.25V~5V (50mV per step). Operated in the adjustable mode
when the FB pin is connected to an external resistors divider,
its output can be adjusted from 1.25V to 5V. Other key
features include over-current protection, thermal shutdown.
The device is available in the small SOT23-5 package.
FEATURES
z 2.5V to 5.5V Input Voltage Range
z 180mV@300mA Dropout Voltage
z Excellent Transient Response
z Stable with 1uF Ceramic Output Capacitor
z 70dB PSRR at 1kHz
z Low 90µA Quiescent Current
z Low Shutdown Current<1µA
z Output Current Limit
z Short Circuit Protection
z Output Voltage With High Accuracy:
2% Initial Accuracy
Fixed Output Voltage1.25V~5V (0.05V step)
Adjustable Output Voltage: 1.25V~5V
z Thermal Shutdown
z Output Auto-Discharge in Shutdown
z RoHS Compliant and 100% Lead (Fb)-Free
APPLICATIONS
Typical Application Circuit
z Cellular Phones
z Bluetooth portable radios and Accessories
z Battery-Powered Equipment
z Laptop, Palmtops, Notebook Computer
z PDAs
z Digital still Camera and Video Recorders
DS7903 Ver 1.0 Nov. 2008
Figure. 1 Adjustable Output
1
1 page  
Tel: 0755-8398 3377 / 135 9011 2223 http://www.gofotech.com
Absolute Maximum Ratings (1)
EUP7903
VIN,VEN -------------------------------------------------------------------------------------------- -0.3V to 6V
VOUT -------------------------------------------------------------------------------------- -0.3V to (VIN+0.3V)
Junction Temperature -------------------------------------------------------------------------------- +150
Storage Temperature Range ----------------------------------------------------------------- -65 to +150
Lead Temperature ----------------------------------------------------------------------------------- +260
Thermal Resistance θJA (SOT23-5) --------------------------------------------------------------- 220/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 to +85
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
TA=25, V IN=VOUT+1V, or VIN=2.5V for VOUT<1.5V unless otherwise specified.
Symbol
Parameter
Conditions
EUP7903
Min. Typ. Max.
Input Voltage
VIN
IQ
ISHDN
PSRR
VFB
Enable
Input Voltage
Quiescent Current
Shutdown Current
Power Supply Ripple
Rejection
FB Pin Voltage
VEN=3.5V, IOUT=0mA
VEN=0V
VIN=VNOM+1VP-P,f=100Hz,
ILOAD=10mA
2.5
1.225
90
0.1
75
1.25
5.5
130
1
1.275
VENH Enable High Voltage
VENL Disable Low Voltage
IEN EN Input Current
TST Start-up Time
Output voltage
Over temperature range
Over temperature range
VIN=3.5V, VEN=3.5V or 0V
VIN=3.5V, VOUT=2.5V
1.5
0.4
-1 0.2
1
40
VOUT Output Voltage Accuracy
VLNR Output Line Regulation
VLDR Output Load Regulation
VDROP
Dropout Voltage (3)
(Applied for VOUT≥2.3V)
IOUTMAX Maximum Output Current
Protection
VIN=VOUT+1V, IOUT=10mA
VIN=VOUT+1V, IOUT=10mA,
TA =-40 to +85
VOUT+0.5V<VIN<5.5V, IOUT=10mA
1mA < IOUT <300mA,
VIN=VNOM+1.0V
IOUT=300mA
-2
-3
0.01
10
180
300
+2
+3
0.1
16
240
ILIMIT Current Limit
TSD Thermal Shutdown Temperature No Load, VIN=VEN=5V
TSDHYS Thermal Shutdown Hysteresis No Load, VIN=VEN=5V
330 500
155
30
Note (3): Dropout is defined as VIN-VOUT when VOUT is 2% below the value of VOUT for VIN=VOUT+0.5V.
Unit
V
µA
µA
dB
V
V
V
µA
µs
%
%
%/V
mV
mV
mA
mA
DS7903 Ver 1.0 Nov. 2008
5
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