A6150 Datasheet, PDF (1/14 Pages) List of Unclassifed Manufacturers – High Efficiency Linear Power Supply with Power Surveillance and Software Monitoring

EM MICROELECTRONIC-MARIN SA
A6150
High Efficiency Linear Power Supply with
Power Surveillance and Software Monitoring
Features
„ Highly accurate 5 V, 100 mA guaranteed output
„ Low dropout voltage, typically 380 mV at 100 mA
„ Low quiescent current, typically 175 µA
„ Standby mode, maximum current 340 µA (with
100 µA load on OUTPUT)
„ Unregulated DC input can withstand –20 V reverse
battery and + 60 V power transients
„ Fully operational for unregulated DC input voltage
up to 26 V and regulated output voltage down to 3.0 V
„ Reset output guaranteed for regulated output voltage
down to 1.2 V
„ No reverse output current
„ Very low temperature coefficient for the regulated output
„ Current limiting
„ Comparator for voltage monitoring,voltage reference
1.52 V
„ Programmable reset voltage monitoring
„ Programmable power on reset (POR ) delay
„ Watchdog with programmable time windows guarant-
ees a minimum time and a maximum time between
software clearing of the watchdog
„ Time base accuracy ± 10%
„ System enable output offers added security
„ TTL/CMOS compatible
„ -40 to +85 °C temperature range
„ On request extended temperature range,-40 to +125 °C
„ DIP8 and SO8 packages
Description
The A6150 offers a high level of integration by combining
voltage regulation, voltage monitoring and software
monitoring in an 8 lead package. The voltage regulator
has a low dropout voltage (typ. 380 mV at 100 mA) and a
low quiescent current (175 µA). The quiescent current
increases only slightly in dropout prolonging battery life.
Built-in protection includes a positive transient absorber for
up to 60 V (load dump) and the ability to survive an
unregulated input voltage of –20 V (reverse battery). The
input may be connected to ground or a reverse voltage
without reverse current flow from the output to the input. A
comparator monitors the voltage applied at the V_IN input
comparing it with an internal 1.52 V reference. The power-
on reset function is initialized after V_IN reaches 1.52 V and
takes the reset output inactive after T_POR depending of
external resistance. The reset output goes active low when
the V_IN voltage is less than 1.52 V. The RES and EN
outputs are guaranteed to be in a correct state for a
regulated output voltage as low as 1.2 V. The watchdog
function monitors software cycle time and execution. If
software clears the watchdog too quickly (incorrect
cycle time) or too slowly (incorrect execution) it will
cause the system to be reset. The system enable
output prevents critical control functions being
activated until software has successfully cleared the
watchdog three times. Such a security could be used
to prevent motor controls being energized on
repeated resets of a faulty system.
Applications
„ Automotive systems
„ Cellular telephones
„ Security systems
„ Battery powered products
„ High efficiency linear power supplies
„ Automotive electronics
Version A0:
Version A1:
Unregu-
lated
voltage
INPUT OUTPUT
5V
A6150
R
V_IN
TCL
RES
V_SS
EN
GND
Fig. 1
Typical Operating Configuration
Pin A_Ds_IPs₈i_/g_Sn_Om₈ ent
EN
RES
TCL
V_SS
A6150
V _IN
R
OUTPUT
INPUT
Fig. 2
1