MAX4840EXT-T Maxim Integrated Products, MAX4840EXT-T Datasheet - Page 5

• Manufacturer Part Number: MAX4840EXT-T
• Description: Communication ICs - Various
• Manufacturer: Maxim Integrated Products
• Type: Overvoltage Protection Controllerr

Specifications of MAX4840EXT-T

• Mounting Style: SMD/SMT
• Package / Case: SC-70-6
• Supply Current: 0.14 mA
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Figure 1. Startup Timing Diagram
Figure 3. Power-Up Overvoltage Timing Diagram
MAX4838/
MAX4840/
MAX4842
I
( ) MAX4842
( ) MAX4842
GATE
V
V
V
GATE
FLAG
0V
1
2
3
4
5
6
IN
V
0V
IN
PIN
MAX4839/
MAX4841
V
OVLO
V
UVLO
5, 6
—
1
2
3
4
_______________________________________________________________________________________
t
t
Overvoltage Protection Controllers with
OVP
START
NAME
FLAG
GATE
GND
N.C.
0.3V
t
80%
EN
GON
IN
5V (4V)
8V (6V)
t
BLANK
Input. IN is both the power-supply input and the overvoltage sense input. Bypass IN to
GND with a 1µF capacitor or larger.
Ground
Fault Indication Output, Active Low. FLAG is asserted low during undervoltage lockout
and overvoltage lockout conditions. FLAG is deasserted during normal operation. FLAG
is open-drain on the MAX4838/MAX4840/MAX4842, and push-pull on the
MAX4839/MAX4841.
Gate-Drive Output. GATE is the output of an on-chip charge pump. When V
V
No Connection. Can be connected to GND.
Device Enable Input, Active Low. Drive EN low or connect to ground to allow normal
device operation. Drive EN high to turn off the external MOSFET.
OVLO
2.4V
, GATE is driven high to turn on the external N-channel MOSFET(s).
8V (6V)
Figure 2. Shutdown Timing Diagram
Figure 4. Disable Timing Diagram
5V (4V)
( ) MAX4842
V
V
FLAG
GATE
V
IN
V
GATE
V
EN
FUNCTION
V
OVLO
1.47V
t
GOFF
t
DIS
Status FLAG
0.3V
Timing Diagrams
0.3V
t
Pin Description
FLAG
0.4V
UVLO
< V
8V (6V)
IN
<
5