MAX6496EVKIT+ Maxim Integrated Products, MAX6496EVKIT+ Datasheet

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MAX6496EVKIT+

Manufacturer Part Number
MAX6496EVKIT+
Description
KIT EVAL FOR MAX6496
Manufacturer
Maxim Integrated Products
Datasheets
1.MAX6499ATAT.pdf (16 pages)
2.MAX6496EVKIT.pdf (4 pages)

Specifications of MAX6496EVKIT+

Main Purpose
Overvoltage Protection
Utilized Ic / Part
MAX6496
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Secondary Attributes
-
Embedded
-
Primary Attributes
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
The MAX6495–MAX6499 is a family of small, low-cur-
rent, overvoltage-protection circuits for high-voltage
transient systems such as those found in automotive
and industrial applications. These devices monitor the
input voltage and control an external n-channel MOSFET
switch to isolate the load at the output during an input
overvoltage condition. The MAX6495–MAX6499 operate
over a wide supply voltage range from +5.5V to +72V.
The gate of the n-channel MOSFET is driven high while
the monitored input is below the user-adjustable over-
voltage threshold. An integrated charge-pump circuit
provides a 10V gate-to-source voltage to fully enhance
the n-channel MOSFET. When the input voltage
exceeds the user-adjusted overvoltage threshold, the
gate of the MOSFET is quickly pulled low, disconnect-
ing the load from the input. In some applications, dis-
connecting the output from the load is not desirable. In
these cases, the protection circuit can be configured to
act as a voltage limiter where the GATE output saw-
tooths to limit the voltage to the load (MAX6495/
MAX6496/MAX6499).
The MAX6496 supports lower input voltages and
reduces power loss by replacing the external reverse
battery diode with an external series p-channel MOSFET.
The MAX6496 generates the proper bias voltage to
ensure that the p-channel MOSFET is on during normal
operations. The gate-to-source voltage is clamped dur-
ing load-dump conditions, and the p-channel MOSFET
is off during reverse-battery conditions.
The MAX6497/MAX6498 feature an open-drain, undedi-
cated comparator that notifies the system if the output
falls below the programmed threshold. The MAX6497
keeps the MOSFET switch latched off until either the
input power or the SHDN pin is cycled. The MAX6498
will autoretry when V
These devices are available in small, thermally
enhanced, 6-pin and 8-pin TDFN packages and are
fully specified from -40°C to +125°C.
19-3778; Rev 8; 1/11
FireWire is a registered trademark of Apple Computer, Inc.
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.
Automotive
Industrial
Telecom/Servers/Networking
FireWire
Notebook Computers
Limiter Controllers with an External MOSFET
®
________________________________________________________________ Maxim Integrated Products
OVSET
72V, Overvoltage-Protection Switches/
General Description
falls below 130mV.
Applications
♦ Wide Supply Voltage Range: +5.5V to +72V
♦ Overvoltage-Protection Switch Controller Allows
♦ Fast Gate Shutoff During Overvoltage with 100mA
♦ Internal Charge-Pump Circuit Ensures 10V
♦ n-Channel MOSFET Latches Off After an
♦ Adjustable Overvoltage Threshold
♦ Thermal Shutdown Protection
♦ Supports Series p-Channel MOSFET for Reverse-
♦ POK Indicator (MAX6497/MAX6498)
♦ Adjustable Undervoltage Threshold (MAX6499)
♦ -40°C to +125°C Operating Temperature Range
♦ Small, 3mm x 3mm TDFN Package
Ordering Information continued at end of data sheet.
Note: All devices are specified over the -40°C to +125°C operating
temperature range.
+ Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
* EP = Exposed pad.
/ V denotes an automotive qualified part.
Selector Guide appears at end of data sheet.
MAX6495ATT+T
MAX6495ATT/V+T
Pin Configurations continued at end of data sheet.
User to Size External n-Channel MOSFETs
Sink Capability
Gate-to-Source Enhancement for Low R
Performance
Overvoltage Condition (MAX6497/MAX6499)
Battery Voltage Protection (MAX6496)
TOP VIEW
PART
3mm x 3mm TDFN
OUTFB
PIN-PACKAGE
6 TDFN-EP*
6 TDFN-EP*
Ordering Information
IN
6
1
MAX6495
Pin Configurations
SHDN
GATE
5
2
OVSET
GND
4
3
Features
TOP MARK
DS(ON)
AJM
AUG
1

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MAX6496EVKIT+ Summary of contents

Page 1

... FireWire ® Notebook Computers FireWire is a registered trademark of Apple Computer, Inc. ________________________________________________________________ Maxim Integrated Products 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. ♦ Wide Supply Voltage Range: +5.5V to +72V ♦ Overvoltage-Protection Switch Controller Allows User to Size External n-Channel MOSFETs ♦ ...

Page 2

Overvoltage-Protection Switches/ Limiter Controllers with an External MOSFET ABSOLUTE MAXIMUM RATINGS (All pins referenced to GND.) IN, GATE, GATEP ...................................................-0.3V to +80V SHDN, CLEAR .............................................-0. POK, OUTFB ..........................................................-0.3V to +80V GATE to OUTFB .....................................................-0.3V to +12V GATEP ...

Page 3

Overvoltage-Protection Switches/ Limiter Controllers with an External MOSFET ELECTRICAL CHARACTERISTICS (continued 14V 6nF -40°C to +125°C, unless otherwise noted. Typical values are GATE A PARAMETER SYMBOL OVSET to GATE Propagation ...

Page 4

Overvoltage-Protection Switches/ Limiter Controllers with an External MOSFET (V = +12V +25°C, unless otherwise noted SUPPLY CURRENT vs. SUPPLY VOLTAGE SET = GND, GATE ENHANCED 135 110 ...

Page 5

Overvoltage-Protection Switches/ Limiter Controllers with an External MOSFET (V = +12V +25°C, unless otherwise noted STARTUP WAVEFORM (C = 100µ 10µ OUT 400µs/div OVERVOLTAGE SWITCH FAULT (C = 100µ ...

Page 6

Overvoltage-Protection Switches/ Limiter Controllers with an External MOSFET PIN NAME SHDN OVSET GND GATE ...

Page 7

Overvoltage-Protection Switches/ Limiter Controllers with an External MOSFET Detailed Description Overvoltage Monitoring When operating in overvoltage mode, the MAX6495– MAX6499 feedback path (Figure 1) consists of IN, OVSET’s internal comparator, the internal gate charge pump, and the external n-channel ...

Page 8

Overvoltage-Protection Switches/ Limiter Controllers with an External MOSFET The gate cycles during overvoltage-limit and overvolt- age-switch modes are quite similar but have distinct characteristics. In overvoltage-switch mode, GATE is enhanced 10V) while the monitored V IN ...

Page 9

Overvoltage-Protection Switches/ Limiter Controllers with an External MOSFET Power-OK Output (MAX6497/MAX6498) POK is an open-drain output that remains low when the voltage at POKSET is below the internal POKSET threshold (1.18V). POK goes high impedance when POKSET goes above ...

Page 10

Overvoltage-Protection Switches/ Limiter Controllers with an External MOSFET where I is GATE’s 100µA sourcing current, I GATE is the load current at startup, and C capacitor. MOSFET Selection Select external MOSFETs according to the application current level. The MOSFET’s ...

Page 11

Overvoltage-Protection Switches/ Limiter Controllers with an External MOSFET • The overvoltage waveform period (t • The power dissipated across the package (P During an initial overvoltage occurrence, the discharge time (∆ caused ...

Page 12

Overvoltage-Protection Switches/ Limiter Controllers with an External MOSFET GATE 12V IN IN OUTFB MAX6495 SHDN OVSET GND Figure 6. Overvoltage Limiter (MAX6495) GATE OUTFB POKSET 12V IN SHDN MAX6497 MAX6498 OVSET POK GND Figure 8. Overvoltage Protection to a ...

Page 13

Overvoltage-Protection Switches/ Limiter Controllers with an External MOSFET IN UVLO 5V OVSET 1.24V MAX6495 GND Figure 10. Functional Diagram (MAX6495) IN UVLO 5V OVSET 0.505V 1.24V MAX6497 MAX6498 GND Figure 12. Functional Diagram (MAX6497/MAX6498) ______________________________________________________________________________________ THERMAL PROTECTION 10V CHARGE ...

Page 14

Overvoltage-Protection Switches/ Limiter Controllers with an External MOSFET p-CHANNEL PART FUNCTION MAX6495 OV Switch/Limiter MAX6496 OV Switch/Limiter MAX6497 OV Switch MAX6498 OV Switch MAX6499 OV/UV Switch/Limiter TOP VIEW N.C. OUTFB 8 7 MAX6496 SHDN 3mm x ...

Page 15

Overvoltage-Protection Switches/ Limiter Controllers with an External MOSFET Ordering Information (continued) PART PIN-PACKAGE MAX6496ATA+T 8 TDFN-EP* MAX6497ATA+T 8 TDFN-EP* MAX6498ATA+T 8 TDFN-EP* MAX6499ATA+T 8 TDFN-EP* Note: All devices are specified over the -40°C to +125°C operating temperature range. + ...

Page 16

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 16 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2011 Maxim Integrated Products ...

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