Micrel
MIC2589/MIC2595
Pin Desription (cont.)
Pin Number
12
Pin Name
PWRGD2
(MIC25XX-1)
Pin Function
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
(V
THRESH(PG2)
= 0.63V, typical). Also see PWRGD1 and PGTIMER pin descriptions
/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
(V
THRESH(PG2)
= 0.63V, typical). Also see /PWRGD1 and PGTIMER pin descriptions.
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
(V
THRESH(PG3)
= 1.15V, typical). Also see PWRGD1 and PGTIMER pin descriptions.
/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 (V
THRESH(PG3)
= 1.15V, typical). Also see /PWRGD1 and
PGTIMER pin descriptions.
Positive Supply Input: Connect to the positive, or high side, terminal of the input
power supply.
12
/PWRGD2
(MIC25XX-2)
13
PWRGD3
(MIC25XX-1)
13
/PWRGD3
(MIC25XX-2)
14
VDD
December 2005
5
M9999-120505
(408) 955-1690
MICREL [ MICREL SEMICONDUCTOR ]
