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What is STL6340?

This electronic component, produced by the manufacturer "Semtron", performs the same function as "250mA Low Quiescent Current Linear Regulator".


STL6340 Datasheet PDF - Semtron

Part Number STL6340
Description 250mA Low Quiescent Current Linear Regulator
Manufacturers Semtron 
Logo Semtron Logo 


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STL6340
250mA Low Quiescent Current Linear Regulator
DESCRIPTION
FEATURE
The STL6340 series is a positive voltage
regulator with high accuracy output voltage and
ultra-low quiescent current which is typically 2.0μA.
The device is ideal for handheld communication
equipments and battery powered applications which
require low quiescent current.
The STL6340 consists of a bandgap reference
voltage source, an error amplifier, a P-channel pass
transistor, a resistor-divider for setting output
voltage, a current limiter, and temperature limit
protection circuit. The high-accuracy output voltage
is preset at an internally trimmed voltage 1.8V, 2.5V
or 3.3V. Other output voltages can be
maskoptioned from 1.2V to 5.0V with 100mV
increment. (but only 1.28V in stead of 1.3V)
‹ Low Current Consumption: 2μA
‹ Short Circuit Protection: 200mA
‹ Low Dropout: 150mV@100mA (VOUT2.0V)
‹ Operating Voltages Range: 1.8V to 6.0V
‹ Output Range: 1.2V to 5.0V with 100mV
Increment
‹ Output Current Limit Protection: 350mA
‹ Thermal Overload Shutdown Protection
‹ High Ripple Rejestion: 60dB
‹ Low ESR Capacitor Compatible
APPLICATIONS
‹ Battery Powered Equipment.
‹ Portable Information Application
‹ PDA
‹ MP3
‹ Digital Video Recorder
PIN CONFIGURATION
VIN
GND
EN
VOUT
NC
TOP VIEW
SOT-25
PART MARKING INFORMATION
STL6340-XX XX-XX X
Lead Plating Code
Handling Code
Package Code
Voltage Code
Lead Plating Code
G : Lead-free & Halogen-free product
Handling Code
TR : Tape&Reel
Package Code
S5 : SOT-25
Voltage Code
XX : 12 / 15 / 18 / 25 / 28 / 30 / 33
Marking:
09VXX
SOT-25
09 : STL6340
V : Voltage code
5:1.2V, 8:1.5V
A:1.8V, G:2.5V
K:2.8V, M:3.0V
Q:3.3V
XX : Date code
STL6340 Rev.1.0
Copyright © Semtron Microtech Corp.
1
www.semtron-micro.com

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STL6340 equivalent
APPLICATION INFORMATION
Detail Description
The STL6340 is a low quiescent current LDO
linear regulator. The device provides preset 1.8V,
2.5V and 3.3V output voltages for output current up
to 350mA. Other mask options for special output
voltages from 1.2V to 5.0V with 100mV increment
are also available (but only 1.28V in stead of 1.3V).
As illustrated in function block diagram, it consists of
a 1.23V reference, error amplifier, a P-channel pass
transistor, an ON/OFF control logic, and an internal
feedback voltage divider.
The 1.23V bandgap reference 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 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
gate is pulled up to decrease the output voltage.
The output voltage is feedback through an internal
resistive divider connected to VOUT pin. Additional
blocks include with output current limiter and
shutdown logic.
Internal P-channel Pass Transistor
The STL6340 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 conditions when the pass transistor
saturates, and use high base-drive currents under
large loads. The STL6340 does not suffer from
these problems and consumes only 2.0μA (Typical)
of current consumption under light loads.
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 due to the several M
resistance of the feedback voltage divider between
VOUT and GND pins.
Output Voltage Selection
The STL6340 output voltage is preset at an
internally trimmed voltage 1.8V, 2.5V or 3.3V. The
output voltage also can be mask-optioned from 1.2V
to 5.0V with 100mV increment by special order (but
STL6340
only 1.28V in stead of 1.3V). The first two digits of
part number suffix identify the output voltage (see
Ordering Information). For example, STL6340-33
has a preset 3.3V output voltage.
Current Limit
The STL6340 also includes a fold back current
limiter. It monitors and controls the pass-transistor’s
gate voltage, estimates the output current, and limits
the output current within 350mA.
Thermal Overload Protection
Thermal overload protection limits total power
dissipation in the STL6340. 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
active again after the junction temperature cools
down by 10°C, resulting in a pulsed output during
continuous thermal overload conditions.
Thermal overload protection is designed to protect
the STL6340 in the event of fault conditions. For
continuous operation, the maximum operating
junction temperature rating of TJ=+125°C should not
be exceeded.
Dropout Voltage
A regulator’s minimum input-output voltage
differential, or dropout voltage, determines the
lowest us- able supply voltage. In battery-powered
systems, this will determine the useful end-of-life
battery voltage. The STL6340 uses a P-channel
MOSFET pass transistor, its dropout voltage is a
function of drain-to-source on-resistance (RDS(ON))
multiplied by the load current.
VDROPOUT= VIN - VOUT= RDS(ON) x IOUT
STL6340 Rev.1.0
Copyright © Semtron Microtech Corp.
5
www.semtron-micro.com


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Part Details

On this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for STL6340 electronic component.


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