19-3582; Rev 2; 5/10
Overvoltage Protection Controllers
with Reverse Polarity Protection
General Description
The MAX4864L/MAX4865L/MAX4866L/MAX4867 over-
voltage protection controllers protect low-voltage sys-
tems against high-voltage faults up to +28V, and
negative voltages down to -28V. These devices drive a
low-cost complementary MOSFET. If the input voltage
exceeds the overvoltage threshold, these devices turn
off the n-channel MOSFET to prevent damage to the
protected components. If the input voltage drops below
ground, the devices turn off the p-channel MOSFET to
prevent damage to the protected components. An inter-
nal charge pump eliminates the need for external
capacitors and drives the MOSFET GATEN for a simple,
robust solution.
The overvoltage thresholds are preset to +7.4V
(MAX4864L), +6.35V (MAX4865L), +5.8V (MAX4866L),
and +4.65V (MAX4867). When the input voltage drops
below the undervoltage lockout (UVLO) threshold, the
devices enter a low-current standby mode (8.5µA). Also in
shutdown (EN set to logic-high), the current is reduced fur-
ther (0.4µA). The MAX4864L/MAX4865L/MAX4866L have
a +2.85V UVLO threshold, and the MAX4867 has a +2.5V
UVLO threshold.
In addition, a ±15kV ESD protection is provided to the
input when bypassed with a 1µF capacitor to ground. All
devices are offered in a small 6-pin SOT23 and a 6-pin,
2mm x 2mm µDFN package, and are specified for
operation over the -40°C to +85°C temperature range.
Features
♦
Overvoltage Protection Up to +28V
♦
Reverse Polarity Protection Down to -28V
♦
Preset Overvoltage (OV) Trip Level (7.4V, 6.35V,
5.8V, 4.65V)
♦
Drive Low-Cost Complementary MOSFET
♦
Internal 50ms Startup Delay
♦
Internal Charge Pump
♦
8.5µA Standby Current (In UVLO Mode)
♦
0.4µA Shutdown Current
♦
Overvoltage Fault FLAG Indicator
♦
6-Pin (2mm x 2mm) µDFN and 6-Pin SOT23
Packages
MAX4864L/MAX4865L/MAX4866L/MAX4867
Ordering Information
PART
MAX4864LEUT-T
MAX4864LELT
MAX4865LEUT-T
MAX4865LELT
MAX4866LEUT-T
MAX4866LELT
MAX4867EUT-T
MAX4867ELT
PIN-
PACKAGE
6 SOT23-6
6 μDFN
6 SOT23-6
6 μDFN
6 SOT23-6
6 μDFN
6 SOT23-6
6 μDFN
OV TRIP
LEVEL (V)
7.40
7.40
6.35
6.35
5.80
5.80
4.65
4.65
TOP
MARK
ABVO
AAE
ABVP
AAF
ABVQ
AAG
ABVN
AAD
Applications
Cell Phones
Digital Still Cameras
PDAs and Palmtop Devices
MP3 Players
Note:
All devices are specified over the -40°C to +85°C operating
temperature range.
T = Tape and reel.
Typical Operating Circuit
ADAPTER
(-28V TO +28V)
1μF
GATEP
IN
GATEN
P
N
OUTPUT
Functional Diagram appears at end of data sheet.
EN
GND
MAX4864L
MAX4865L
MAX4866L
MAX4867
FLAG
V
IO
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
