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PDF STLQ50M33R Data sheet ( Hoja de datos )
| Número de pieza | STLQ50M33R | |
| Descripción | low drop linear regulator | |
| Fabricantes | STMicroelectronics | |
| Logotipo |  |
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STLQ50XX
50 mA, 3 µA supply current low drop linear regulator
Features
■ 2.3 V to 12 V input voltage range
■ 50 mA maximum output current
■ 3 µA quiescent current
■ Available in 1.8 V, 2.5 V, 3.3 V, 5.0 V and
adjustable
■ 200 mV dropout voltage at 25 mA output
current
■ Internal thermal protection
■ Available in SOT323-5L package, and SOT23-
5L package (upon request)
Applications
■ Portable/battery powered equipments
■ Electronic sensors
■ Microcontroller power
■ Real time clock backup power
SOT323-5L
SOT23-5L
(available on request)
Description
The STLQ50 is a BiCMOS linear regulator
specifically designed for operating in environment
with very low power consumption constraints.
Due to the very low quiescent current (3 µA) the
device is suitable for those application that have
very long stand-by time allowing extension of
battery life.
The P-MOS pass element allows also a very good
drop-out figure (200 mV at 25 mA IO and 350 mV
at full load) without affecting the consumption
characteristics.
Housed in the very small SOT323-5L or SOT23-
5L, it fulfils the space saving requirements in
battery powered equipments.
Table 1. Device summary
Order codes
Part number
STLQ50XX18
STLQ50XX25
STLQ50XX33
STLQ50XX50
STLQ50
1. Available upon request.
Packages
SOT323-5L (T&R)
SOT23-5L (T&R) (1)
STLQ50C18R
STLQ50C25R
STLQ50C33R
STLQ50C50R
STLQ50C-R
STLQ50M18R
STLQ50M25R
STLQ50M33R
STLQ50M50R
STLQ50M-R
Output voltage
Fixed VO = 1.8V
Fixed VO = 2.5V
Fixed VO = 3.3V
Fixed VO = 5.0V
Adjustable
November 2007
Rev. 4
1/18
www.st.com
18
1 page  
STLQ50XX
3 Maximum ratings
Maximum ratings
Table 3. Absolute maximum ratings
Symbol
Parameter
VI
VFB
ESD
TJ
TSTG
DC Input voltage
FB voltage
Human body model (all pins)
Junction temperature
Storage temperature range
Value
-0.3 to +14
-0.3 to +7
±2
-40 to 150
-55 to 150
Unit
V
V
kV
°C
°C
Note:
Absolute maximum ratings are those values beyond which damage to the device may occur.
Functional operation under these conditions is not implied.
Table 4. Thermal data
Symbol
Parameter
RthJA Thermal resistance junction-ambient
1. This value is referred to a 4-layer PCB, JEDEC standard test board.
SOT323-5L
331.4 (1)
SOT23-5L
191 (1)
Unit
°C/W
5/18
5 Page 
STLQ50XX
Application information
7.3 Protection
The P-MOS pass element has an internal diode with anode connected to VO and cathode to
VI. In case VO > VI the current will flow from output to the input without any limitation. In this
case proper limiting network is recommended.
The current limitation is automatically provided by the characteristics of the PMOS pass
element (see typical characteristics), so the short circuit current is dependent on the input
voltage. When considering the short circuit current take care, in any case, to not exceed the
maximum power dissipation sustainable by the device.
The STLQ50 features an internal thermal protection that linearly reduces the output current
when the internal temperature increases, consequently, at a given load, also the output
voltage decreases. The action of the thermal protection starts at 125 °C when the output
voltage slightly decreases, while close to 163 °C the output voltage drops to 0 V. Since this
is a linear control, sudden over current conditions can quickly rise the chip temperature
without time for the thermal protection to act, so it cannot be used as a limitation for the
output current.
11/18
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| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet STLQ50M33R.PDF ] | |
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