A6250X16W EMMICRO [EM Microelectronic - MARIN SA], A6250X16W Datasheet

A6250X16W

Manufacturer Part Number

A6250X16W

Description

High Efficiency Linear Power Supply with Accurate Power Surveillance and Software Monitoring

Manufacturer

EMMICRO [EM Microelectronic - MARIN SA]

Datasheet

1.A6250X16W.pdf (13 pages)

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Features

Description

The A6250 of fers a high level of in te gra tion by com bin ing

volt age reg u la tion, volt age mon i tor ing and soft ware mon i -

tor ing in a 16 lead pack age. The volt age reg u la tor has a

low drop out volt age (typ. 260 mV at 250 mA) and a low

qui es cent cur rent (175 µA). The qui es cent cur rent in -

creases only slightly in drop out pro long ing bat tery life.

Built-in pro tec tion in cludes a pos i tive tran sient ab sorber

for up to 60 V (load dump) and the abil ity to sur vive an un -

reg u lated in put volt age of -20 V (re verse bat tery). The in -

put may be con nected to ground or a re verse volt age

with out re verse cur rent flow from the out put to the in put. A

com para tor mon i tors the volt age ap plied at the V

com par ing it with an in ter nal 1.52 V ref er ence. The

power-on re set func tion is in i tial ized af ter V

V and takes the re set out put in ac tive af ter T

of ex ter nal re sis tance. The re set out put goes ac tive low

when the V

out puts are guar an teed to be in a cor rect state for a reg u -

lated out put volt age as low as 1.2 V. The watch dog func -

tion mon i tors soft ware cy cle time and ex e cu tion. If

High Efficiency Linear Power Supply with Accurate

Highly accurate 5 V, 250 mA guaranteed output

Low dropout voltage, typically 260 mV at 250 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 40 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

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

-40 to +125°C temperature range

PSOP2-16 package

Power Surveillance and Software Monitoring

volt age is less than 1.52 V. The RES and EN

EM MICROELECTRONIC-MARIN SA

POR

reaches 1.52

de pend ing

in put

soft ware clears the watch dog too quickly (in cor rect cy cle

time) or too slowly (in cor rect ex e cu tion) it will cause the

sys tem to be re set. The sys tem en able out put pre vents

crit i cal con trol func tions be ing ac ti vated un til soft ware has

suc cess fully cleared the watch dog three times. Such a se -

cu rity could be used to pre vent mo tor con trols be ing en er -

gized on re peated re sets of a faulty sys tem.

Applications

Typical Operating Configuration

Pin Assignment

Industrial electronics

Cellular telephones

Security systems

Battery powered products

High efficiency linear power supplies

Automotive electronics

A6250

Fig. 2

Fig. 1

Related parts for A6250X16W

A6250X16W Summary of contents

Page 1

EM MICROELECTRONIC-MARIN SA High Efficiency Linear Power Supply with Accurate Power Surveillance and Software Monitoring Features Highly accurate 5 V, 250 mA guaranteed output n Low dropout voltage, typically 260 mV at 250 mA n Low quiescent current, typically 175 ...

Page 2

Absolute Maximum Ratings Parameter Symbol Conditions Continuous voltage at INPUT Transients on INPUT for t< 100 ms and duty cycle 1% Reverse supply voltage on INPUT V Max. voltage at any signal pin Min. voltage at any ...

Page 3

Electrical Characteristics µF + 100 nF, C INPUT L Parameter Supply current in standby mode Supply current 1) Supply current 1) Output voltage Output voltage Output voltage temperature coefficient 2) Line regulation 3) ...

Page 4

Timing Characteristics 100 µ µF + 100 nF, C INPUT L L Parameter Propagation delays: TCL to Output Pins V sensitivity IN Logic Transition Times on all Output Pins Power-on Reset ...

Page 5

Timer Reaction Combined Voltage and Timer Reaction Block Diagram A6250 Fig. 5 Fig. 6 Fig ...

Page 6

Pin Description Pin Name Function 2 EN Push-pull active low enable output 3 RES Open drain active low reset output. RES must be pulled even if unused 4 TCL Watchdog timer clear input signal 5 V GND ...

Page 7

Watchdog Timeout Period Description The watch dog time out pe riod is di vided into two parts, a “closed" win dow and an “open" win dow (see Fig. 3) and is de fined by two pa ram e ters, T ...

Page 8

T versus +25 ° A6250 Fig. 10 ...

Page 9

T versus V atT = +85 °C WD OUTPUT J T versus -40 °C WD OUTPUT J T versus Fig versus Fig. 13 A6250 ...

Page 10

T versus Temperature Maximum OUTPUT Current versus INPUT Voltage 10 T versus Fig. 15 A6250 Fig. 16 Fig. 17 ...

Page 11

Timer Clearing and RES Action The watch dog cir cuit mon i tors the ac tiv ity of the pro ces - sor. If the user’s soft ware does not send a pulse to the TCL in put within the ...

Page 12

T Coefficient versus EXT R Coefficient versus EXT +25 ° +25 °C J A6250 Fig. 19 Fig. 20 ...

Page 13

Package and Ordering Information Dimensions of PSOP2-16 Package Dual Layer PCB Ordering Information The A6250 is avail able in the fol low ing pack age: Type Pack age A6250 X 16W PSOP2-16 When or der ing please spec ify com ...

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