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EM6152A50ES16B PDF预览

EM6152A50ES16B

更新时间: 2024-01-10 14:43:01
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EMMICRO 调节器
页数 文件大小 规格书
12页 723K
描述
5V Automotive Regulator with Windowed Watchdog

EM6152A50ES16B 技术参数

生命周期:Contact Manufacturer包装说明:,
Reach Compliance Code:unknown风险等级:5.72
Is Samacsys:NBase Number Matches:1

EM6152A50ES16B 数据手册

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R
EM MICROELECTRONIC - MARIN SA  
EM6152A  
5V Automotive Regulator with Windowed Watchdog  
Description  
Features  
The EM6152A offers a high level of integration by combining  
voltage regulation, voltage monitoring and software  
monitoring using a windowed watchdog.  
‰
‰
‰
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)  
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.  
‰
‰
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  
‰
‰
‰
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No reverse output current  
Very low temperature coefficient for the regulated output  
Current limiting  
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%.  
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  
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.  
‰
‰
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  
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).  
Pin out compatible with EM6152  
Green SO-8 and Exposed Pad SO-16 packages (RoHS  
compliant)  
In EM6152A, the voltage 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.  
Applications  
‰
‰
‰
‰
‰
‰
Automotive systems  
Industrial  
Home security systems  
Telecom / Networking  
Computers  
Set top boxes  
Typical Operating Configuration  
Selection Table  
Part Number  
Closed  
Window  
67%  
Open  
Window  
33%  
Unregulated  
Voltage  
CAN-bus sleep  
detector  
VREF  
5V  
VDD  
INPUT OUTPUT  
+
EM6152A30  
EM6152A50  
EM6152A53  
1.17 V  
1.52 V  
1.52 V  
NO  
NO  
R1  
EM6152A  
100nF 10uF  
67%  
33%  
VIN  
ROSC  
22uF  
+
I/O  
TCL  
RES  
33%  
67%  
NO  
ROSC  
RES  
I/O  
EM6152A55 1.275 V  
67%  
33%  
YES  
VSS  
EN  
R2  
Please refer to Fig. 4 for more information about the  
open/closed window of the watchdog.  
GND  
Fig. 1  
Copyright © 2006, EM Microelectronic-Marin SA  
06/06, rev. B, Prelim.  
1
www.emmicroelectronic.com  

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