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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX4865 Datasheet

(MAX4864L - MAX4867) Overvoltage Protection Controllers

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DataSheet.in
19-3582; Rev 1; 5/06
Overvoltage Protection Controllers
with Reverse Polarity Protection
General Description
The MAX4864L/MAX4865L/MAX4866L/MAX4867/
MAX4865/MAX4866 overvoltage protection controllers
protect low-voltage systems 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 dam-
age 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 compo-
nents. An internal 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. The MAX4865/MAX4866 have a 4.15V
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.
Applications
Cell Phones
PDAs and Palmtop Devices
Digital Still Cameras MP3 Players
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
Ordering Information
PART
PIN- OV TRIP TOP PKG
PACKAGE LEVEL (V) MARK CODE
MAX4864LEUT-T 6 SOT23-6
MAX4864LELT 6 µDFN
MAX4865LEUT-T 6 SOT23-6
MAX4865LELT 6 µDFN
MAX4866LEUT-T 6 SOT23-6
MAX4866LELT 6 µDFN
MAX4867EUT-T 6 SOT23-6
MAX4867ELT
6 µDFN
7.40 ABVO —
7.40 AAE L622-1
6.35 ABVP —
6.35 AAF L622-1
5.80 ABVQ —
5.80 AAG L622-1
4.65 ABVN —
4.65 AAD L622-1
Note: All devices are specified over the -40°C to +85°C operating
range.
Typical Operating Circuit
Pin Configurations
ADAPTER
(-28V TO +28V)
1µF
PN
GATEP IN GATEN
OUTPUT
MAX4864L
MAX4865L
MAX4866L
EN MAX4867
GND FLAG
VIO
TOP VIEW
IN 1
6 EN
GND 1
GND 2
FLAG 3
MAX4864L
MAX4865L
MAX4866L
MAX4867
5 GATEP
4 GATEN
FLAG 2
IN 3
6 GATEN
MAX4864L
MAX4865L
MAX4866L
MAX4867
5 GATEP
4 EN
SOT23
µDFN
Functional Diagram appears at end of data sheet.
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX4865 Datasheet

(MAX4864L - MAX4867) Overvoltage Protection Controllers

No Preview Available !

DataSheet.in
Overvoltage Protection Controllers
with Reverse Polarity Protection
ABSOLUTE MAXIMUM RATINGS
IN to GND ..............................................................-0.3V to +30V
GATEN, GATEP to GND ........................................-0.3V to +12V
IN to GATEP ...........................................................-0.3V to +20V
FLAG, EN to GND ....................................................-0.3V to +6V
Continuous Power Dissipation (TA = +70°C)
6-Pin µDFN (2mm x 2mm) (derate 2.1mW/°C
above +70°C) ..............................................................168mW
6-Pin SOT23 (derate 8.7mW/°C above +70°C)............696mW
Operating Temperature Range ..........................-40°C to +85°C
Junction Temperature .................................................... +150°C
Storage Temperature Range ............................-65°C to +150°C
Lead Temperature (soldering, 10s) ................................+300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(VIN = +5V (MAX4864L/MAX4865L/MAX4866L), VIN = +4V (MAX4867), TA = -40°C to +85°C, CGATEN = 500pF, unless otherwise
noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
Input Voltage Range
VIN
MAX4864L
1.2 28.0
7.0 7.4 7.8
V
Overvoltage Trip Level
OVLO VIN rising
MAX4865L
MAX4866L
5.95 6.35 6.75
5.45 5.8 6.15
V
MAX4867
4.35 4.65 4.95
Overvoltage Lockout
Hysteresis
MAX4864L
MAX4865L
MAX4866L
75
65
mV
55
Undervoltage Lockout
Threshold
UVLO
MAX4867
VIN falling
MAX4864L/MAX4865L/MAX4866L
MAX4867
50
2.65 2.85 3.05
2.3 2.5 2.7
V
Undervoltage Lockout
Hysteresis
MAX4864L/MAX4865L/MAX4866L
MAX4867
44
mV
25
IN Supply Current
IIN
EN = GND MAX4864L/MAX4865L/MAX4866L
MAX4867
77 120
68 110
µA
UVLO Supply Current
Shutdown Supply Current
GATEN Voltage
IUVLO
ISHD
VGATEN
EN = GND
EN = 1.6V
1µA load
MAX4864L/MAX4865L/MAX4866L,
VIN = +2.6V
MAX4867, VIN = +2.2V
MAX4864L/MAX4865L/MAX4866L,
VIN = 3.6V
MAX4867, VIN = 3.6V
MAX4864L/MAX4865L/MAX4866L
MAX4867
8.5 22
8 18
0.4 2
0.4 2
9 9.83 10
7.5 7.85 8.0
µA
µA
V
GATEN Pulldown Current
GATEP Clamp Voltage
GATEP Pulldown Resistor
FLAG Output-Low Voltage
FLAG Leakage Current
EN Input-High Voltage
EN Input-Low Voltage
IPD
VCLAMP
RGATEP
VOL
VIH
VIL
VIN > OVLO, VGATEN = +5.5V
ISINK = 1mA
VFLAG = +5.5V
12
13.5
32
1.5
32
16.5
48
65
19.5
64
0.4
1
0.4
mA
V
k
V
µA
V
V
2 _______________________________________________________________________________________


Part Number MAX4865
Description (MAX4864L - MAX4867) Overvoltage Protection Controllers
Maker Maxim Integrated Products
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MAX4865 Datasheet PDF






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