MIC2589 datasheet(5/29 Pages) MICREL

5 / 29 page

Micrel

MIC2589/MIC2595

December 2005

M9999-120505

(408) 955-1690

Pin Desription (cont.)

Pin Number

Pin Name

Pin Function

PWRGD2

(MIC25XX-1)

Power-Good Output 2: Asserted when the following is true: (PWRGD1 = Asserted)

AND (Time after Assertion of PWRGD1 = Time PWRGD2, as programmed by the

capacitor on PGTIMER). Once PWRGD1 is asserted, the PGTIMER pin begins to

charge and PWRGD2 will assert when PGTIMER crosses the PWRGD2 threshold

(VTHRESH(PG2) = 0.63V, typical). Also see PWRGD1 and PGTIMER pin descriptions

/PWRGD2

(MIC25XX-2)

/Power-Good Output 2: Asserted when the following is true: (/PWRGD1 = Asserted)

AND (Time after Assertion of /PWRGD1 = Time /PWRGD2, as programmed by the

capacitor on PGTIMER). Once /PWRGD1 is asserted, the PGTIMER pin begins to

charge and /PWRGD2 will assert when PGTIMER crosses the /PWRGD2 threshold

(VTHRESH(PG2) = 0.63V, typical). Also see /PWRGD1 and PGTIMER pin descriptions.

PWRGD3

(MIC25XX-1)

Power-Good Output 3: Asserted when the following is true: (PWRGD1 = Asserted)

AND (Time after Assertion of PWRGD1 = Time PWRGD3, as programmed by the

capacitor on PGTIMER). Once PWRGD1 is asserted, the PGTIMER pin begins to

charge and PWRGD3 will assert when PGTIMER crosses the PWRGD3 threshold

(VTHRESH(PG3) = 1.15V, typical). Also see PWRGD1 and PGTIMER pin descriptions.

/PWRGD3

(MIC25XX-2)

/Power-Good Output 3: Open Collector. Asserted when the following is true:

(/PWRGD1 = Asserted) AND (Time after Assertion of /PWRGD1 = Time /PWRGD3,

as programmed by the capacitor on PGTIMER). Once /PWRGD1 is asserted, the

PGTIMER pin begins to charge and /PWRGD3 will assert when PGTIMER crosses

the /PWRGD3 threshold (VTHRESH(PG3) = 1.15V, typical). Also see /PWRGD1 and

PGTIMER pin descriptions.

VDD

Positive Supply Input: Connect to the positive, or high side, terminal of the input

power supply.

MIC2589 Datasheet(PDF) 5 Page - Micrel Semiconductor