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PDF STL6118 Data sheet ( Hoja de datos )
| Número de pieza | STL6118 | |
| Descripción | Fast Enable with Low Noise LDO | |
| Fabricantes | Semtron | |
| Logotipo |  |
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STL6118
■DESCRIPTION
300mA High Speed, Fast Enable with Low Noise LDO
■FEATURE
The STL6118 series is a low-dropout linear
regulator with ON/OFF control that operates in the
input voltage range from +1.8V to +5.5V and
delivers 300mA output current.
The fixed output voltage is preset at an internally
trimmed voltage 1.2V, 1.5V, 1.8V, 2.5V, 2.85V, 3.0V,
3.3V and 3.6V are available by special order only.
The STL6118 consissts of a 0.87V bandgap
reference, an error amplifier, and a P-channel pass
transistor, Other features include short-circuit
protection, thermal shutdown protections. The
STL6118 series devices are available in SOT-25,
SOT-23 package.
Low Current Consumption: 30μA
Short Circuit Protection: 70mA
Typical Dropout Voltage: 90mV@100mA(Typ.)
Fast Response in Power-on Transient: 35μs
Output Current Limit Protection: 500mA
Thermal Overload Shutdown Protection
Control Output ON/OFF Function
■APPLICATIONS
Battery Powered Equipment.
Cameras, Video Cameras
Portable Games
Radio Communication Equipment
Mobile Phone, Coreless Phone
■PIN CONFIGURATION
Vout
NC/ADJ
Vin GND EN
SOT-23 -5L
Top View
■PART MARKING INFORMATION
STL 6118 – XX X – TR G
ab
cd ef
Vin
Vout
GND
SOT-23L
Top View
a : Company name,Product Serial number.
b : Product Number
c: Output Voltage Code.
d: Package code.
e : Handling code.
f : Green produce code.
STL6118 Rev.1.3
Copyright © Semtron Microtech Corp.
1
www.semtron-micro.com
1 page  
■APPLICATION INFORMATION
◆Detail Description
The STL6118 is a low-dropout linear regulator.
The device provides preset 1.2V to 3.3V output
voltages for output current up to 300mA. Other
mask options for special output voltages are also
available. As illustrated in function block diagram, it
consists of a 0.87V bandgap reference, an error
amplifier, a P-channel pass transistor and an
internal feedback voltage divider.
The bandgap reference for is connected to the
error amplifier, which compares this reference with
the feedback voltage and amplifies the voltage
difference. If the feedback voltage is lower than the
reference voltage, the pass transistor’s gate is
pulled lower, which allows more current to pass to
the output pin and increases the output voltage. If
the feedback voltage is too high, the pass
transistor’s gate is pulled up to decrease the output
voltage.
The output voltage is feed back through an
internal resistor divider connected to VOUT pin.
Additional blocks include an output current limiter,
thermal sensor, and shutdown logic.
◆Output Voltage Selection
The output voltage is preset at an internally
trimmed voltage. The first two digits of part number
suffix identify the output voltage (see Ordering
Information). For example, the STL6118-33 has a
preset 3.3V output voltage.
◆Current Limit
The STL6118 includes a foldback current limiter.
It monitors and controls the pass transistor’s gate
voltage, estimates the output current, and limits the
output current under 500mA.
◆Thermal Overload Protection
Thermal overload protection limits total power
dissipation of the STL6118. When the junction
temperature exceeds TJ = +155°C, a thermal
sensor turns off the pass transistor, allowing the IC
to cool down. The thermal sensor turns the pass
transistor on again after the junction temperature
cools down by 30°C, resulting from a pulsed output
during continuous thermal overload conditions.
Thermal overload protection is designed to
protect STL6118 from the event of fault conditions.
For continuous operation, the absolute maximum
operating junction temperature rating of TJ =
+125°C should not be exceeded.
STL6118
◆Internal P-channel Pass Transistor
The STL6118 features a P-channel MOSFET
pass transistor. Unlike similar designs using PNP
pass transistors, P-channel MOSFETs require no
base drive, which reduces quiescent current. PNP-
based regulators also waste considerable current
in dropout when the pass transistor saturates, and
use high base-drive currents under large loads.
The STL6118 does not suffer from these
problems and consumes only 30μA (Typ.) of
current consumption under heavy loads as well as
in dropout conditions.
◆Enable Function
EN pin starts and stops the regulator. When the
EN pin is switched to the power off level, the
operation of all internal circuit stops, the build-in P-
channel MOSFET output transistor between pins
VIN and VOUT is switched off, allowing current
consumption to be drastically reduced. The VOUT
pin enters the GND level through the internal
discharge path between VOUT and GND pins.
◆Fast Discharge Function
The STL6118 has fast discharge function on EN
pin disable. When user turns off the device, its
internal pull-low resistor will discharge output
capacitor’s charge. It’ll avoid the following device to
arise malfunctions.
STL6118 Rev.1.3
Copyright © Semtron Microtech Corp.
5
www.semtron-micro.com
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet STL6118.PDF ] | |
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