Details, datasheet, quote on part number: A6150A0
Description5V Accurate Regulator With Integrated Windowed Watchdog
CompanyEM Microelectronic
DatasheetDownload A6150A0 datasheet
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Features, Applications

High Efficiency Linear Power Supply with Power Surveillance and Software Monitoring

Highly accurate 100 mA guaranteed output Low dropout voltage, typically 100 mA Low quiescent current, typically 175 A Standby mode, maximum current 340 A (with 100 A load on OUTPUT) Unregulated DC input can withstand 20 V reverse battery and 60 V power transients Fully operational for unregulated DC input voltage 26 V and regulated output voltage down 3.0 V Reset output guaranteed for regulated output voltage down 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 guarantees 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 +85 C temperature range On request extended temperature C DIP8 and SO8 packages 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.


Automotive systems Cellular telephones Security systems Battery powered products High efficiency linear power supplies Automotive electronics


The A6150 offers a high level of integration by combining voltage regulation, voltage monitoring and software monitoring an 8 lead package. The voltage regulator has a low dropout voltage (typ. at 100 mA) and a low quiescent current (175 A). The quiescent current increases only slightly in dropout prolonging battery life. Built-in protection includes a positive transient absorber for 60 V (load dump) and the ability to survive an unregulated input voltage 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 VIN input comparing it with an internal 1.52 V reference. The poweron reset function is initialized after VIN reaches 1.52 V and takes the reset output inactive after TPOR depending of external resistance. The reset output goes active low when the VIN voltage is less than 1.52 V. The RES and EN outputs are guaranteed in a correct state for a regulated output voltage as low 1.2 V. The watchdog function monitors software cycle time and execution. If VSS

Parameter Continuous voltage at INPUT to VSS Transients on INPUT for 100 ms and duty cycle 1% Reverse supply voltage on INPUT Max. voltage at any signal pin Min. voltage at any signal pin Storage temperature Electrostatic discharge max. to MIL-STD-883C method 3015 Max. soldering conditions Symbol VINPUT VTRANS VREV VMAX VMIN TSTO VSmax TSmax Conditions 20 V OUTPUT 0.3 V VSS 10 s

Parameter Operating junction temperature 1) INPUT voltage 2) OUTPUT voltage 2) 3) RES & EN guaranteed 4) OUTPUT current 5) Comparator input voltage RC-oscillator programming Thermal resistance from junction to ambient -DIP8 -SO8 Symbol TJ VINPUT VOUTPUT IOUTPUT VIN R Min. Typ. Max. +125 26 Units V k

Table 1 Stresses above these listed maximum ratings may cause permanent damage to the device. Exposure beyond specified operating conditions may affect device reliability or cause malfunction.

This device has built-in protection against high static voltages or electric fields; however, anti-static precautions must be taken as for any other CMOS component. Unless otherwise specified, proper operation can only occur when all terminal voltages are kept within the supply voltage range. At any time, all inputs must be tied to a defined logic voltage level.

The maximum operating temperature is confirmed by sampling at initial device qualification. In production, all devices are tested at +85 C. On request devices tested +125 C can be supplied. Full operation quaranteed. To achieve the load regulation specified in Table 22 F capacitor or greater is required on the INPUT, see Fig. 18. The 22 F must have an effective resistance 5 and a resonant frequency above 500 kHz. 10 F load capacitor and 100 nF decoupling capacitor are required on the regulator OUTPUT for stability. The 10 F must have an effective series resistance of 5 and a resonant frequency above 500 kHz. RES and EN (EN only for version A0) must be pulled up externally to VOUTPUT even if they are unused. (Note: RES and EN are used as inputs by EM test). The OUTPUT current will not apply for all possible combinations of input voltage and output current. Combinations that would require the A6150 to work above the maximum junction temperature (+125 C) must be avoided. The thermal resistance specified assumes the package is soldered to a PCB.

Test Conditions REXT = don't care, TCL = VOUTPUT, VIN 100 A REXT 100 k, I/PS at VOUTPUT, O/PS M to VOUTPUT, 100 A REXT 100 k, I/PS at VOUTPUT, VINPUT 8.0 V, O/PS M to VOUTPUT, IL 100 mA, 6 V VINPUT = 1 mA, = 100 mA, +125 C VINPUT = 100 A, REXT 100 k, O/PS M to VOUTPUT, I/PS at VOUTPUT = +25 C, = 50 mA, VINPUT 10 ms OUTPUT tied to VSS VOUTPUT 4.5 V, IOL= 20 mA VOUTPUT 4.5 V, IOL 8 mA VOUTPUT 2.0 V, IOL 4 mA VOUTPUT 1.2 V, IOL 0.5 mA VOUTPUT 4.5 V, IOH= -1 mA VOUTPUT 2.0 V, IOH= -100 A VOUTPUT 1.2 V, IOH= -30 A

Supply current in standby mode ISS Supply current 1) Supply current 1) Output voltage Output voltage Output voltage temperature coefficient 2) Line regulation 3) Load regulation 3) Dropout voltage 4) Dropout voltage 4) Dropout voltage 4) Dropout supply current Thermal regulation 5) ISS VOUTPUT Vth(coeff) VLINE VL VDROPOUT ISS Vthr

Current limit ILmax OUTPUT noise, to 100kHz VNOISE RES & EN Output Low Voltage VOL EN (vers. A1) Output High Voltage VOH TCL and VIN TCL Input Low Level VIL TCL Input High Level VIH Leakage current ILI VIN input resistance RVIN VREF Comparator reference 6)7) VREF Comparator hysteresis 7) VHY

If INPUT is connected to VSS, no reverse current will flow from the OUTPUT to the INPUT, however the supply current specified will be sank by the OUTPUT to supply the A6150. 2) The OUTPUT voltage temperature coefficient is defined as the worst case voltage change divided by the total temperature range. 3) Regulation is measured at constant junction temperature using pulse testing with a low duty cycle. Changes in OUTPUT voltage due to heating effects are covered in the specification for thermal regulation. 4) The dropout voltage is defined as the INPUT to OUTPUT differential, measured with the input voltage equal V. 5) Thermal regulation is defined as the change in OUTPUT voltage at a time T after a change in power dissipation is applied, excluding load or line regulation effects. 6) The comparator and the voltage regulator have separate voltage references (see " Block Diagram" Fig. 7). 7) The comparator reference is the power-down reset threshold. The power-on reset threshold equals the comparator reference voltage plus the comparator hysteresis (see Fig. 4).


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