19-3582; Rev 1; 5/06
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
o
Overvoltage Protection Up to +28V
o
Reverse Polarity Protection Down to -28V
o
Preset Overvoltage (OV) Trip Level (7.4V, 6.35V,
5.8V, 4.65V)
o
Drive Low-Cost Complementary MOSFET
o
Internal 50ms Startup Delay
o
Internal Charge Pump
o
8.5µA Standby Current (In UVLO Mode)
o
0.4µA Shutdown Current
o
Overvoltage Fault FLAG Indicator
o
6-Pin (2mm x 2mm) µDFN and 6-Pin SOT23
Packages
MAX4864L/MAX4865L/MAX4866L/MAX4867
Ordering Information
PART
MAX4864L
EUT-T
MAX4864LELT
MAX4865L
EUT-T
MAX4865LELT
MAX4866L
EUT-T
MAX4866LELT
MAX4867
EUT-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 PKG
MARK CODE
ABVO
ABVP
ABVQ
ABVN
—
—
—
—
AAE L622-1
AAF L622-1
AAG L622-1
AAD L622-1
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
range.
Typical Operating Circuit
ADAPTER
(-28V TO +28V)
1μF
GATEP
IN
GATEN
GND 2
P
N
OUTPUT
Pin Configuration
TOP VIEW
IN 1
6
EN
GND
1
6
GATEN
EN
GND
MAX4864L
MAX4865L
MAX4866L
MAX4867
FLAG
V
IO
FLAG 3
MAX4864L
MAX4865L
MAX4866L
MAX4867
5
GATEP
FLAG
2
MAX4864L
MAX4865L
MAX4866L
MAX4867
5
GATEP
4
GATEN
IN
3
4
EN
SOT23
μDFN
Functional Diagram appears at end of data sheet.
________________________________________________________________
Maxim Integrated Products
1
For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
