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EM6152A Schematic ( PDF Datasheet ) - EM Microelectronic

Teilenummer EM6152A
Beschreibung 5V Automotive Regulator
Hersteller EM Microelectronic
Logo EM Microelectronic Logo 




Gesamt 12 Seiten
EM6152A Datasheet, Funktion
R EM MICROELECTRONIC - MARIN SA
EM6152A
5V Automotive Regulator with Windowed Watchdog
Description
The EM6152A offers a high level of integration by combining
voltage regulation, voltage monitoring and software
monitoring using a windowed watchdog.
A comparator monitors the voltage applied at the VIN input
comparing it with an internal voltage reference VREF. The
power-on reset function is initialized after VIN reaches VREF
and takes the reset output inactive after a delay TPOR
depending on external resistance ROSC. The reset output goes
active low when the VIN voltage is less than VREF. 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. For enhanced security, the watchdog
must be serviced within an “open” time window. During the
remaining time, the watchdog time window is “closed” and a
reset will occur should a TCL pulse be received by the
watchdog during this “closed” time window. The ratio of the
open/closed window is either 33%/67% or 67%/33%.
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.
When the microcontroller goes in stand-by mode or stops
working, no signal is received on the TCL input of the
EM6152A (version 55) and it goes into a stand-by mode in
order to save power (CAN-bus sleep detector).
wwwIn.DEatMaS6h1e5e2t4AU, .tchoemvoltage regulator has a low dropout voltage
and a low quiescent current of 90 μA. The quiescent current
increases only slightly in dropout prolonging battery life. Built-
in protection includes a positive transient absorber for up to
45 V (load dump) and the ability to survive an unregulated
input voltage of -42 V (reverse battery). The input may be
connected to ground or to a reverse voltage without reverse
current flowing from the output to the input.
Features
‰ Low quiescent current 90 μA
‰ -40°C to +125°C temperature range
‰ Highly accurate 5 V, 150 mA guaranteed output (actual
maximum current depends on power dissipation)
‰ Low dropout voltage, typically 250 mV at 100 mA
‰ Unregulated DC input can withstand -42 V reverse battery
and +45 V power transients
‰ Fully operational for unregulated DC input voltage up to
40 V and regulated output voltage down to 3.5 V
‰ No reverse output current
‰ Very low temperature coefficient for the regulated output
‰ Current limiting
‰ Windowed watchdog with an adjustable time windows,
guaranteeing a minimum time and a maximum time
between software clearing of the watchdog
‰ Time base accuracy ±8% (at 100ms)
‰ Sleep mode function (V55)
‰ Adjustable threshold voltage using external resistors
‰ Adjustable power on reset (POR) delay using one
external resistor
‰ Open-drain active-low RESET output
‰ Reset output guaranteed for regulated output voltage
down to 1.2 V
‰ System ENABLE output offers added security
‰ Qualified according to AEC-Q100
‰ Pin out compatible with EM6152
‰ Green SO-8 and Exposed Pad SO-16 packages (RoHS
compliant)
Applications
‰ Automotive systems
‰ Industrial
‰ Home security systems
‰ Telecom / Networking
‰ Computers
‰ Set top boxes
Typical Operating Configuration
Unregulated
Voltage
22uF +
ROSC
INPUT OUTPUT
EM6152A
ROSC
VIN
TCL
RES
VSS EN
+
100nF 10uF R1
R2
5V
VDD
I/O
RES
I/O
GND
Fig. 1
Selection Table
Part Number
VREF
EM6152A30
EM6152A50
EM6152A53
EM6152A55
1.17 V
1.52 V
1.52 V
1.275 V
Closed
Window
67%
67%
33%
67%
Open
Window
33%
33%
67%
33%
CAN-bus sleep
detector
NO
NO
NO
YES
Please refer to Fig. 4 for more information about the
open/closed window of the watchdog.
Copyright © 2006, EM Microelectronic-Marin SA
06/06, rev. B, Prelim.
1
www.emmicroelectronic.com






EM6152A Datasheet, Funktion
R
Voltage Monitoring
VIN
VREF
VHY
EM6152A
Conditions:
VOUTPUT > 3V
No timeout
TSEN
TSEN
TSEN
TSEN
RES
Timer Reaction
TPOR
TCL
TCW
TCW
TTCL TCW + TOW TCW + TOW
TOW
RES
EN 1
23
Timeout
3 correct TCL services
EN goes active low
www.DataSheet4U.com
- Watchdog timer reset
Combined Voltage and Timer Reaction
VIN
VREF
TCL
TPOR
TOW
TCW+TOW
TTCL
TCW
RES
EN
- Watchdog timer reset
1
TCL
too early
2
TPOR
Fig. 5
Conditions: VIN > VREF after power-up sequence
TCW
TCW + TOW
TTCL
TWDR
Fig. 6
Condition:
VOUTPUT > 3V
3
3 correct TCL services
EN goes active low
Fig. 7
Copyright © 2006, EM Microelectronic-Marin SA
06/06, rev. B, Prelim.
6
www.emmicroelectronic.com

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EM6152A pdf, datenblatt
R
Package Information
Dimensions of 8-pin SOIC Package
D
A1 A
B
e
4 321
56 78
E
C
L
H
Dimensions in mm
Min Nom Max
A 1.35 1.63 1.75
A1 0.10 0.15 0.25
B 0.33 0.41 0.51
C 0.19 0.20 0.25
D 4.80 4.94 5.00
E 3.80 3.94 4.00
e 1.27
H 5.80 5.99 6.20
L 0.40 0.64 1.27
0 - 8°
Dimensions of Exposed Pad SO-16 Package
Fig. 14
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Dual Layer PCB
EM6152A
Dimensions in mm
Min Nom
A 1.43
1.55
A1 0.00
0.05
A2 1.43
1.50
B 0.35
0.41
C 0.19
0.20
D 9.80
9.93
E 3.81
3.94
e 1.27
H 5.84
5.99
L 0.41
0.64
Max
1.68
0.10
1.58
0.49
0.25
9.98
3.99
6.20
0.89
Exposed pad: 3.56 x 2.29 mm
Fig. 15
EM6152A Ex. Pad SO16 top layer Dimensions in mm EM6152A Ex. Pad SO16 bottom layer
Fig. 16
EM Microelectronic-Marin SA (EM) makes no warranty for the use of its products, other than those expressly contained in the Company's
standard warranty which is detailed in EM's General Terms of Sale located on the Company's web site. EM assumes no responsibility for
any errors which may appear in this document, reserves the right to change devices or specifications detailed herein at any time without
notice, and does not make any commitment to update the information contained herein. No licenses to patents or other intellectual
property of EM are granted in connection with the sale of EM products, expressly or by implications. EM's products are not authorized for
use as components in life support devices or systems.
SUBJECT TO CHANGE WITHOUT NOTICE
Copyright © 2006, EM Microelectronic-Marin SA
06/06, rev. B, Prelim.
12
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