1
Introduction
1.1
General description
The TLS820F3ELV33 and TLS820F3ELV50 are monolithic integrated low drop out voltage regulators for loads up
to 200 mA in a PG-SSOP-14 package. With an input voltage range of 3 V to 42 V and very low quiescent current
of only 26 µA, these devices are perfectly suitable for automotive or other supply systems connected to the
battery permanently. Both variants provide an output voltage accuracy of ±2%.
The loop concept combines fast regulation and very good stability while requiring only one small ceramic
capacitor of 1 µF at the output. The operating range starts already at an input voltage of only 3 V (extended
operating range). This makes the devices also suitable to supply automotive systems that need to operate
during cranking condition.
Additional features include:
•
switching the device on and off via enable
•
reset circuit to supervise the output voltage and delay the reset at power-on with an adjustable lower reset
threshold
•
watchdog circuit to monitor a microcontroller
•
shared external delay capacitor to set both reset timing and watchdog timing
•
output current limitation
•
thermal shutdown
1.2
TLS820F3ELV33 and TLS820F3ELV50 features
•
Output voltage 5 V and 3.3 V ±2%
•
Current capability 200 mA
•
Input voltage range from 3 V to 42 V
•
Stable with 1
μ
F ceramic output capacitor
•
Ultra low current consumption: typically 26
μ
A
•
Very low drop out voltage: typically 100 mV at 100 mA
•
Watchdog circuit for monitoring a microprocessor
•
Watchdog inhibit
•
Reset circuit supervises the output voltage
-
Programmable undervoltage reset threshold: minimum 2.5 V
-
Programmable delay time
•
Separate outputs for reset and watchdog
•
Enable
•
Output current limitation
•
Overtemperature shutdown
•
Automotive temperature range
T
j
= -40°C to 150°C
•
Green Product (RoHS compliant)
OPTIREG
™
linear voltage regulator TLS820F3ELVxx demoboard
Z8F68163446
1 Introduction
User manual
3
Rev. 1.0
2020-02-26