System construction with a functionality safety guarantee is required for millimeter wave radar/sensing camera units used for automotive ADAS and autonomous driving systems.  Asahi Kasei Microdevices Corporation, (AKM), has launched low-noise LDO regulators, the AP1161AB and the AP1163ABN, which meet functional safety *1.  These products incorporate a high-precision monitoring function to the output voltage and a self-diagnostic function, achieving functional safety.

 

*1:  ISO26262 requirements for functional safety requirements can easily be achieved when utilized these devices.

 

Features

。 High precision monitoring of output voltage

The AP1161ABN/AP1163ABN monitors the output voltage to detect undervoltage and overvoltage status.  If the status is met, a flag signal is sent to the MCU.

 

。 Self-diagnostic function

Failure of the monitoring function can be detected by inputting, "H", signal to the DIAG pin.  By incorporating this function into the system, periodic fault detection during operation is available.

 

。 Low-output noise

The AP1161ABC/1163ABC achieves output noise of 180 nV/√Hz, (at 10kHz), and PSRR of 78dB, (at 1kHz) *2.  This exceeds the requirements of in-vehicle communications for severe noise and RF power supply requirements.

 

*2:  PSRR of the AP1163ABN.  The AP1161ABN has a PSRR of 76 dB, (at 1 kHz).

Product Name	AP1161ABN	AP1163ABN
Output Noise	180nV/√Hz at 10kHz	180nV/√Hz at 10kHz
Maximum Current Output	300mA	1000mA
Self-Diagnosis Function	Overvoltage Detection, Undervoltage Detection
Reference Voltage and Accuracy	3.38V ± 65mV	3.38V ± 65mV
Input/Output Voltage Difference	300mV (at Iout=300mA)	300mV (at Iout=1000mA)
Ripple Rejection	76dB (at 1kHz)	78dB (at 1kHz)
Operating Temperature Range	-40 to 125°C	-40 to 125°C
Power Dissipation	3.125W	3.125W
Package	16-pin HQFN	16-pin HQFN

source：http://www.akm.com/