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PDF SE5509B Data sheet ( Hoja de datos )
| Número de pieza | SE5509B | |
| Descripción | 300mA Low Power Low Noise LDO CMOS Voltage Regulator | |
| Fabricantes | Seaward Electronics | |
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300mA Low Power Low Noise
LDO CMOS Voltage Regulator
SE5509B
Description
The SE5509B series of fixed output low
dropout linear regulators are designed for portable
battery powered applications, which require low
power consumption, low noise environment, and
low dropout voltage. Each device contains a
bandgap voltage reference, an error amplifier, a
PMOS power transistor, and resistors for setting
output voltage, and current limit and temperature
limit protection circuits.
The SE5509B has been designed to be used
with low cost capacitors and requires a minimum
output capacitor of 1.0μF. The output voltages
range from 1.3V to 4.4V in 100mV increments.
Standard voltage versions are 1.5, 1.8, 2.5, 2.8, 3.0,
and 3.3V. The SE5509B is characterized for
operation from -40oC to 125oC, junction
temperarure.
Pin Configuration
Features
¾ Typical 110mV Dropout Voltage at 150mA.
¾ Fast Enable Turn-On Time of 20μs (Typ.)
¾ Excellent Line and Load Regulation.
¾ High Accuracy Output Voltage of 3%.
¾ Ultra-Low Ground Current at 35μA (Typ.)
¾ Disable Current Less than 0.01μA (Typ.)
¾ Over Current and thermal Protection.
¾ No Reverse Current.
¾ ESD rating is 2.5KV(HBM).
¾ Standard SOT-23-5L and TSOP-5 Package.
¾ 100% Lead (Pb)-Free
Application
¾ USB removable devices
¾ MPEG4 devices
¾ Wireless LAN’s
¾ Hand-Held Instrumentation.
¾ Portable DVD players
¾ Digital camera
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Block Diagram
Ordering Information
SE5509B _ _ _
Pin (1=>5):
G: VIN/GND/EN/BYPASS/VOUT
Package:
L: SOT-23-5L / TSOP-5
Output Voltage: A: VOUT = 3.3V
B: VOUT = 2.8V
C: VOUT = 2.5V
D: VOUT = 1.8V
E: VOUT = 1.5V
F: VOUT = 3.0V
Revision 5/4/2009
Preliminary and all contents are subject to change without prior notice
© Seaward Electronics Inc., 2006. • www.seawardinc.com.cn • Page 1
1 page  
300mA Low Power Low Noise
LDO CMOS Voltage Regulator
SE5509B
Application Hints
Like any low dropout regulator, SE5509B requires
external capacitors to ensure stability. The
external capacitors must be carefully selected to
ensure performance.
Input Capacitor
An input capacitor of at least 1μF is required. The
inexpensive Electrolytic capacitor is preferred. The
value can be increased without upper limit.
Thermal Considerations
It is important that the thermal limit of the package is
not exceeded. The SE5509B has built-in thermal
protection. When the thermal limit is exceeded,
the IC will enter protection, and VOUT will be pulled
to ground. The power dissipation for a given
application can be calculated as following:
The power dissipation (PD) is
PD = IOUT * [VIN – VOUT]
Output Capacitor
An output capacitor is required for stability. It must
be placed no more than 1 cm away from the VOUT
pin, and connected directly between VOUT and GND
pins. The inexpensive Electrolytic capacitor is
recommended. The minimum value is 1μF but may
be increased without limit.
The thermal limit of the package is then limited to
PD(MAX) = [TJ – TA]/ΘJA where TJ is the junction
temperature, TA is the ambient temperature, and
ΘJA is around 230°C/W for SE5509B. SE5509B is
designed to enter thermal protection at 150°C. For
example, if TA is 25°C then the maximum PD is
limited to about 0.6W. In other words, if IOUT(MAX) =
300mA, then [VIN – VOUT] cannot exceed 2V.
Application Diagram
www.DataSheet4U.com
Revision 5/4/2009
Preliminary and all contents are subject to change without prior notice
© Seaward Electronics Inc., 2006. • www.seawardinc.com.cn • Page 5
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet SE5509B.PDF ] | |
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