MAXIM MAX4864L, MAX4865L, MAX4866L, MAX4867, MAX4865 User Manual
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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 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 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 further (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
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/MAX4865/MAX
4866
Overvoltage Protection Controllers
with Reverse Polarity Protection
________________________________________________________________ Maxim Integrated Products 1
19-3582; Rev 1; 5/06
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.
Ordering Information
PA R T
PIN -
OV T RIP
)
TOP
PKG
CODE
M A X4 8 6 4 L E U T- T
7.40
—
M AX 4864LE LT 6 µD FN 7.40
L622-1
M A X4 8 6 5 L E U T- T
6.35
—
M AX 4865LE LT 6 µD FN 6.35
L622-1
M A X4 8 6 6 L E U T- T
5.80
—
M AX 4866LE LT 6 µD FN 5.80
L622-1
M A X4 8 6 7 E U T- T
4.65
—
M AX 4867E LT 6 µD FN 4.65
L622-1
Functional Diagram appears at end of data sheet.
Note: All devices are specified over the -40°C to +85°C operating
range.
ADAPTER
(-28V TO +28V)
OUTPUT
V
IO
IN
FLAG
GATEN
1µF
GND
EN
GATEP
MAX4864L
MAX4865L
MAX4866L
MAX4867
PN
Typical Operating Circuit
Pin Configurations
GND
GATENFLAG
16EN
5 GATEP
IN
MAX4864L
MAX4865L
MAX4866L
MAX4867
SOT23
TOP VIEW
2
34
FLAG
ENIN
GATEN
GATEP
GND
MAX4864L
MAX4865L
MAX4866L
MAX4867
µDFN
1
2
3
6
5
4
Cell Phones
Digital Still Cameras
PDAs and Palmtop Devices
MP3 Players
PA C K A G E
6 S OT23- 6
6 S OT23- 6
6 S OT23- 6
6 S OT23- 6
LEVEL (V
MARK
ABVO
AAE
ABVP
AAF
ABVQ
AAG
ABVN
AAD
MAX4864L/MAX4865L/MAX4866L/MAX4867
Overvoltage Protection Controllers
with Reverse Polarity Protection
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
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.
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 (T
A
= +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
ELECTRICAL CHARACTERISTICS
(VIN= +5V (MAX4864L/MAX4865L/MAX4866L), VIN= +4V (MAX4867), TA= -40°C to +85°C, C
GATEN
= 500pF, unless otherwise
noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Input Voltage Range V
IN
V
MAX4864L
MAX4865L
MAX4866L
Overvoltage Trip Level
VIN rising
MAX4867
V
MAX4864L 75
MAX4865L 65
MAX4866L 55
Overvoltage Lockout
Hysteresis
MAX4867 50
mV
MAX4864L/MAX4865L/MAX4866L
Undervoltage Lockout
Threshold
VIN falling
MAX4867
V
MAX4864L/MAX4865L/MAX4866L 44
Undervoltage Lockout
Hysteresis
MAX4867 25
mV
MAX4864L/MAX4865L/MAX4866L 77
IN Supply Current I
IN
MAX4867 68
µA
MAX4864L/MAX4865L/MAX4866L,
V
IN
= +2.6V
22
UVLO Supply Current I
UVLO
MAX4867, V
IN
= +2.2V 8 18
µA
MAX4864L/MAX4865L/MAX4866L,
V
IN
= 3.6V
2
Shutdown Supply Current I
SHD
MAX4867, V
IN
= 3.6V
2
µA
MAX4864L/MAX4865L/MAX4866L 9
10
GATEN Voltage
1µA load
MAX4867
V
GATEN Pulldown Current I
PD
V
IN
> OVLO, V
GATEN
= +5.5V 12 32 65 mA
GATEP Clamp Voltage
V
GATEP Pulldown Resistor
32 48 64 kΩ
FLAG Output-Low Voltage V
OL
I
SINK
= 1mA
V
FLAG Leakage Current V
FLAG
= +5.5V 1 µA
EN Input-High Voltage V
IH
V
EN Input-Low Voltage V
IL
V
OVLO
1.2 28.0
7.0 7.4 7.8
5.95 6.35 6.75
5.45 5.8 6.15
4.35 4.65 4.95
UVLO
V
GATEN
V
CLAMP
R
GATEP
EN = GND
EN = GND
EN = 1.6V
2.65 2.85 3.05
2.3 2.5 2.7
7.5 7.85 8.0
13.5 16.5 19.5
1.5
8.5
0.4
0.4
9.83
120
110
0.4
0.4
MAX4864L/MAX4865L/MAX4866L/MAX4867
Overvoltage Protection Controllers
with Reverse Polarity Protection
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(VIN= +5V (MAX4864L/MAX4865L/MAX4866L), VIN= +4V (MAX4867), TA= -40°C to +85°C, C
GATEN
= 500pF, unless otherwise
noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
EN Input Leakage Current I
LKG
EN = GND or +5.5V 1 µA
TIMING
Startup Delay
V
IN
> UVLO to V
GATEN
> 0.3V, Figure 1 20 50 80 ms
FLAG Blanking Time
V
GATEN
> 0.3V to V
FLAG
< 0.3V, Figure 1 20 50 80 ms
GATEN Turn-On Time t
GON
C
GATEN
= 500pF, V
GATEN
= 0.3V to +8V
(MAX4864L/MAX4865L/MAX4866L)
V
GATEN
= 0.3V to +7V (MAX4867), Figure 1
10 ms
GATEN Turn-Off Time t
Goff
V
I N
r i si ng at 3V /µs fr om + 5V to + 8V
( M AX 4864L/M AX 4865L/M AX 4866L) ,
or fr om + 4V to + 7V ( M AX 4867)
V
GAT E N
= 0.3V , C
GAT E N
= 500p F, Fi g ur e 2
720µs
FLAG Assertion Delay t
FLAG
VIN rising at 3V/µs from 5V to 8V
( M AX 4864L/M AX 4865L/M AX 4866L) ,
or from +4V to +7V (MAX4867), V
FLAG
= 0.3V,
Figure 2
µs
Initial Overvoltage Fault Delay t
OVP
VIN rising at 3V/µs from 0V to +9V, time from
V
IN
= 5V to I
GATEN
= 80% of I
PD
(GATEN pulldown
current), Figure 3
µs
Disable Time t
DIS
VEN = +2.4V, V
GATEN
= 0.3V, Figure 4 2 µs
Note 1: All parts are 100% tested at +25°C. Electrical limits across the full temperature range are guaranteed by design and correlation.
V
GATEN
V
EN
+0.3V
+2.4V
t
DIS
Figure 4. Disable Timing Diagram
V
IN
V
UVLO
t
GON
t
START
V
GATEN
V
FLAG
t
BLANK
+0.3V
+8V (+7V)*
*MAX4867
+5V
+0.3V
Figure 1. Startup Timing Diagram
V
IN
V
OVLO
V
GATEN
V
FLAG
t
FLAG
t
GOFF
+0.3V
+0.3V
+5V
Figure 2. Shutdown Timing Diagram
V
IN
V
OVLO
t
OVP
I
GATEN
80%
0V
Figure 3. Power-Up Overvoltage Timing Diagram
t
START
t
BLANK
3.5
1.5
MAX4864L/MAX4865L/MAX4866L/MAX4867
Overvoltage Protection Controllers
with Reverse Polarity Protection
4 _______________________________________________________________________________________
Typical Operating Characteristics
(TA = +25°C, unless otherwise noted.)
Typical Operating Characteristics
(TA = +25°C, unless otherwise noted.)
SUPPLY CURRENT vs. SUPPLY VOLTAGE
(MAX4864L)
MAX4864 toc01
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (µA)
252015105
50
100
150
200
250
300
350
0
030
REVERSE CURRENT vs. OUTPUT VOLTAGE
(MAX4864L)
MAX4864 toc02
OUTPUT VOLTAGE (V)
REVERSE CURRENT (µA)
4321
0.1
0.2
0.3
0.4
0
05
EN = 3V
REVERSE CURRENT vs. OUTPUT VOLTAGE
(MAX4864L)
MAX4864 toc03
OUTPUT VOLTAGE (V)
REVERSE CURRENT (µA)
4321
20
40
60
80
0
05
EN = 0V
DEVICE TURNS ON
AT TRANSITION
MAX4864L/MAX4865L/MAX4866L
GATEN VOLTAGE vs. INPUT VOLTAGE
MAX4864 toc04
INPUT VOLTAGE (V)
GATEN VOLTAGE (V)
642
3
6
9
12
15
0
08
MAX4864L
MAX4865L
MAX4866L
MAX4867
GATEN VOLTAGE vs. INPUT VOLTAGE
MAX4864 toc05
INPUT VOLTAGE (V)
GATEN VOLTAGE (V)
642
3
6
9
12
15
0
08
MAX4867
POWER-UP RESPONSE
MAX4864 toc06
20ms/div
10V
0V
5V
0V
IN
GATEN
FLAG
5V
0V
ADAPTER
5V
0V
POWER-UP RESPONSE
MAX4864 toc07
IN
5V/div
FLAG
5V/div
OUT
5V/div
ADAPTER
5V/div
20ms/div
IIN
1A/div
OVERVOLTAGE RESPONSE
MAX4864 toc08
IN
FLAG
5V/div
GATEN
5V/div
ADAPTER
2µs/div
I
GATEN
10mA/div
5V
8V
5V
8V
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