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PDF EUP7907-15JIR1 Data sheet ( Hoja de datos )
| Número de pieza | EUP7907-15JIR1 | |
| Descripción | 600mA High PSRR Low Dropout Linear Regulator | |
| Fabricantes | Eutech Microelectronics | |
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EUP7907
600mA High PSRR Low Dropout
Linear Regulator
DESCRIPTION
The EUP7907 is a high current, low dropout 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 EUP7907 is designed to work with low-ESR ceramic
capacitor, reducing the amount of the PCB area necessary for
power applications. Only a 2.2uF ceramic capacitor can
make the device stable over the whole load range.
The EUP7907 monitors the input voltage for power on reset
to ensure the regulator is disabled when the input voltage is
not high enough for normal operation. When EUP7907
detects fault signal, such as over-temperature, it will turn off
the pass transistor and discharge VOUT to GND from the
internal resistor.
The EUP7907 has two modes of operation. When the FB pin
is connected to ground, its output is a pre-set value:
0.8V~3.6V. There is no external component needed to decide
the output voltage. When the version of EUP7907 with fixed
voltage higher than 1.5V is selected and its FB pin is
connected to two external resistors divider, its output can be
adjusted from 0.8V to 5V. Other key features include
over-current protection, thermal shutdown. The device can
be available in the TDFN-8 package or SOT23-5 package.
FEATURES
z 2.5V to 5.5V Input Voltage Range
z 300mV@600mA Dropout Voltage
z Excellent Transient Response
z Stable with 2.2uF Ceramic Output Capacitor
z 70dB PSRR at 1kHz
z Low 120µA Quiescent Current
z Low Shutdown Current:<1µA
z Output Current Limit
z Output Voltage With High Accuracy:
2% Initial Accuracy
Fixed Output Voltage: 0.8V ~ 3.6V
Adjustable Output Voltage: 0.8V to 5V
z Thermal Shutdown
z COUT Auto-Discharge when Shutdown
z RoHS Compliant and 100% Lead (Fb)-Free
APPLICATIONS
z Cellular Phones
z Bluetooth portable radios and Accessories
z battery-Powered Equipment
z Laptop, Palmtops, Notebook Computer
Typical Application Circuit
DS7907 Ver 1.2 Oct . 2009
Figure. 1 Adjustable Output
1
1 page  
Tel: 0755-8398 3377 / 135 9011 2223 http://www.gofotech.com
Absolute Maximum Ratings
EUP7907
VIN,VEN ----------------------------------------------------------------------------------------------- -0.3 to 6V
VOUT ------------------------------------------------------------------------------------------- -0.3 to (VIN+0.3)
Junction Temperature -------------------------------------------------------------------------------- 150
Storage Temperature Range ----------------------------------------------------------------- -65 to +150
Lead Temperature ------------------------------------------------------------------------------------ 260
Thermal Resistance θJA (SOT23-5) --------------------------------------------------------------- 205/W
Thermal Resistance θJA (TDFN-8) ---------------------------------------------------------------- 72 /W
ESD Rating
Human Body Model --------------------------------------------------------------------------
2kV
Operating Conditions
VIN --------------------------------------------------------------------------------------------------- 2.5 to 5.5V
VEN --------------------------------------------------------------------------------------------------- 0 to 5.5V
Operating Temperature Range ---------------------------------------------------------------- -40 to +85
Electrical Characteristics
TA=25, V IN=VOUT+1V, or VIN=2.5V for VOUT<1.5V unless otherwise specified
Symbol
Parameter
Conditions
Input Voltage
VIN
VPORTH
VPORHYS
IQ
ISHDN
PSRR
VFB
Enable
Input Voltage
POR Threshold
POR hysteresis
Quiescent Current
Shutdown Current
Power Supply Ripple
Rejection
FB Pin Voltage
VENH Enable High Voltage
VENL Disable Low Voltage
IEN EN Input Current
TST Start-up Time
Output voltage
VOUT Output Voltage Accuracy
VLNR Output Line Regulation
VLDR Output Load Regulation
VDROP
Dropout Voltage
(Applied for VOUT≥2.3V)
IOUTMAX Maximum Output Current
VEN=VIN, IOUT=0mA
VEN=0V
VIN=VNOM+1VP-P,f=1kHz,ILOAD=10mA
Over temperature range
Over temperature range
VIN=5V, VEN=5V or 0V
VIN=VNOM+1.0V, IOUT=10mA
VIN=VNOM+1.0V, IOUT=10mA,
TEMP=-40 to 85
VOUT+0.5V<VIN<5.5V, IOUT=10mA
1 mA <IOUT<600mA, VIN=VNOM+1.0V
IOUT=300mA
IOUT=600mA
EUP7907
Min. Typ. Max. Unit
2.5 5.5 V
2.1 V
0.4 V
120 180 µA
0.1 1 µA
70 dB
0.784 0.8 0.816 V
1.5 V
0.4 V
-1 1 µA
40 µs
-2 +2 %
-3 +3 %
0.04 0.1 %/V
0.5 %/A
180 240
mV
360 450
600 mA
DS7907 Ver 1.2 Oct . 2009
5
5 Page 
Tel: 0755-8398 3377 / 135 9011 2223 http://www.gofotech.com
EUP7907
Input Capacitor
A 2.2uF capacitor is required between the VIN pin and
the GND pin. Place it as close as possible to the device.
There are no requirements for the ESR on the input
capacitor, but the tolerance and temperature coefficient
must be considered when selecting the capacitor to
ensure the capacitance will be 2.2uF over the whole
operating temperature range.
Output Capacitor
The EUP7907 is designed specifically to work with very
small ceramic output capacitors. A 2.2uF to 10uF with
5mΩ to 500mΩ ESR range is suitable in the EUP7907
application circuit. The ESR of a typical 2.2uF ceramic
capacitor is about 20mΩ, which easily meets the ESR
requirement for stability.
Capacitor Characteristics
More consideration should be taken when selecting the
capacitor because its capacitance can vary with
temperature. The capacitor type X7R or X5R, which
operates over a temperature range of -40 to +85 ,
will only vary within ±15%. Some large value ceramic
capacitors are manufactured with Z5U or T5V
temperature characteristics. Their capacitance can drop
by more than 50% as the temperature goes from 25 to
85. Therefore the capacitor type X7R or X5R is
recommended in applications where the ambient
temperature will change significantly above or below
25.
No Load Stability
The EUP7907 will remains stable and in regulation with
no external load. This is special important in CMOS
RAM keep-alive applications.
Thermal Considerations
Thermal protection limits power dissipation in
EUP7907.When the operation junction temperature
exceeds 170°C, the OTP circuit starts the thermal
shutdown function and turns the pass element off. The
pass element turn on again after the junction temperature
cools by 30°C.
For continuous operation, do not exceed absolute
maximum operation junction temperature 125°C. The
power dissipation definition in device is:
( )PD = VIN − VOUT × IOUT + VIN × IQ
(EQ.3)
The maximum power dissipation depends on the thermal
resistance of IC package, PCB layout, the rate of
surroundings airflow and temperature difference between
junction to ambient. The maximum power dissipation can
be calculated by following formula :
PD(MAX) = (TJ(MAX) − TA ) θJA
(EQ.4)
Where TJ(MAX) is the maximum operation junction
temperature 125°C, TA is the ambient temperature and the
θJA is the junction to ambient thermal resistance.
For recommended operating conditions specification of
EUP7907, where TJ(MAX) is the maximum junction
temperature of the die (125°C) and TA is the operated
ambient temperature. The junction to ambient thermal
resistance θJA is layout dependent. For SOT-23-5 package,
the thermal resistance θJA is 205°C/W on the standard
thermal test board. For TDFN-8 package, the thermal
resistance θJA is 72°C/W on the standard thermal test
board. The maximum power dissipation at TA = 25°C can
be calculated by following formula :
PD(MAX) = (125°C − 25°C) 205 = 0.488W (EQ.5)
for SOT23-5 package
PD(MAX) = (125°C − 25°C) 72 = 1.388W (EQ.6)
for TDFN-8 package
The maximum power dissipation depends on operating
ambient temperature for fixed TJ(MAX) and thermal
resistance θJA. For EUP7907 packages, the Figure 5 of
derating curves allows the designer to see the effect of
rising ambient temperature on the maximum power
allowed.
Figure 5. Power Dissipation for EUP7907 Packages
The EUP7907 is available in two standard packages:
TDFN-8 and SOT23-5 packages.
DS7907 Ver 1.2 Oct . 2009
11
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| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet EUP7907-15JIR1.PDF ] | |
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