Overvoltage Protection Controllers
with Reverse Polarity Protection
5L/MAX4867
ELECTRICAL CHARACTERISTICS (continued)
(V = +5V (MAX4864L/MAX4865L/MAX4866L), V = +4V (MAX4867), T = -40°C to +85°C, C
= 500pF, unless otherwise
IN
IN
A
GATEN
noted. Typical values are at T = +25°C.) (Note ±)
A
PARAMETER
EN Input Leakage Current
TIMING
SYMBOL
CONDITIONS
MIN
TYP
MAX UNITS
I
EN = GNꢀ or +5.5V
±
µA
LKG
Startup ꢀelay
t
V
V
> UVLO to V > 0.3V, Figure ±
GATEN
20
20
50
50
80
80
ms
ms
START
IN
FLAG Blanking Time
t
> 0.3V to V
< 0.3V, Figure ±
BLANK
GATEN
FLAG
C
= 500pF, V
= 0.3V to +8V
GATEN
GATEN
(MAX4864L/MAX4865L/MAX4866L)
GATEN Turn-On Time
GATEN Turn-Off Time
t
±0
ms
GON
V
= 0.3V to +7V (MAX4867), Figure ±
GATEN
V
rising at 3V/µs from +5V to +8V
IN
(MAX4864L/MAX4865L/MAX4866L),
or from +4V to +7V (MAX4867)
t
7
20
µs
GOFF
V
= 0.3V, C
= 500pF, Figure 2
GATEN
GATEN
V
rising at 3V/µs from 5V to 8V
IN
(MAX4864L/MAX4865L/MAX4866L),
FLAG Assertion ꢀelay
t
3.5
µs
FLAG
or from +4V to +7V (MAX4867), V
Figure 2
= 0.3V,
FLAG
V
V
rising at 3V/µs from 0V to +9V, time from
IN
IN
Initial Overvoltage Fault ꢀelay
ꢀisable Time
t
= 5V to I
= 80% of I (GATEN pulldown
±.5
2
µs
µs
OVP
GATEN
Pꢀ
current), Figure 3
t
V
= +2.4V, V = 0.3V, Figure 4
GATEN
ꢀIS
EN
Note 1: All parts are ±00% tested at +25°C. Electrical limits across the full temperature range are guaranteed by design and correlation.
+5V
V
V
IN
IN
V
UVLO
V
OVLO
t
+5V
FLAG
t
GON
t
GOFF
+8V (+7V)*
t
START
V
V
GATEN
FLAG
V
GATEN
FLAG
+0.3V
+0.3V
V
+0.3V
+0.3V
t
BLANK
*MAX4867
Figure ±. Startup Timing ꢀiagram
Figure 2. Shutdown Timing ꢀiagram
V
V
EN
IN
+2.4V
V
OVLO
0V
t
OVP
t
DIS
80%
I
GATEN
V
GATEN
+0.3V
Figure 4. ꢀisable Timing ꢀiagram
_______________________________________________________________________________________
Figure 3. Power-Up Overvoltage Timing ꢀiagram
3
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
