Product Details
General Description
The MAX8686 current-mode, synchronous PWM stepdown regulator with
integrated MOSFETs operates from a 4.5V to 20V input supply and
generates an adjustable output voltage from 0.7V to 5.5V while
delivering up to 25A per phase.
The MAX8686 employs a peak current-mode architecture that operates
with an adjustable switching frequency from 300kHz to 1MHz. An
adjustable current-limit thresh old allows for optimization for
different applications with different load currents. Inductor
current sense is achieved either using an external sense resistor
or using a lossless inductor current-sense scheme. The foldback and
hiccup current limit reduces the power dissipation during overload
or short-circuit conditions and allows for autorecovery when the
fault condition is removed.
The MAX8686 offers the ability to start up monotonically even when
there is a prebias output voltage. In addition, an adjustable
soft-start capability allows for a controlled turn-on. The MAX8686
features an accurate 1% reference and offers a reference input that
allows for a higher accuracy reference to be used for voltage
tracking applications such as DDR memory.
The MAX8686 can be paralleled (up to eight) together in a true
multiphase mode to deliver up to 200A of output current. When
operating in this mode, this device achieves better than 10%
current balance between phases at full load. The MAX8686 supports
programmable phase shedding to improve system efficiency during
light load conditions.
Other features include an enable input and a power-OK (POK)
indicator used for power sequencing. The MAX8686 also features
latch overvoltage protection that turns on the low-side MOSFET when
the output voltage exceeds 120% of the nominal voltage. The MAX8686
is offered in a thermally enhanced 40-pin, 6mm x 6mm TQFN package.
Features
♦ Operating Range from 4.5V to 20V Input Supply
♦ 1% Reference Voltage Accuracy Over Temperatu
♦ Reference Input (REFIN) for Output Tracking or System Reference
Voltage
♦ Adjustable Switching Frequency from 300kHz to 1MHz
♦ Single/Multiphase Operation Delivers Up to 25A/200A with
Integrated MOSFETs
♦ Adjustable Current Limit
♦ Monotonic Output Voltage at Startup (Prebias)
♦ Output Sink and Source Current Capability
♦ Adjustable Soft-Start
♦ Thermal-Overload Protection
♦ Output Overvoltage Protection
♦ Thermally Enhanced 6mm x 6mm TQFN Package (4W)
Applications
POL Power Supplies
Module Replacements
Telecom Equipment
Networking Equipment
Servers
DDR Memory
Specification
| Attribute | Attribute Value |
|---|
| Manufacturer | Maxim Integrated |
| Product Category | DC Switching Regulators |
| Series | MAX8686 |
| Type | Voltage Converter |
| Packaging | Tape & Reel (TR) Alternate Packaging |
| Mounting-Style | SMD/SMT |
| Package-Case | 40-WFQFN Exposed Pad |
| Operating-Temperature | -40°C ~ 85°C (TA) |
| Mounting-Type | Surface Mount |
| Output-Type | Adjustable |
| Function | Step-Down |
| Supplier-Device-Package | 40-TQFN-EP (6x6) |
| Number-of-Outputs | 1 Output |
| Topology | Buck |
| Frequency-Switching | 300kHz ~ 1MHz |
| Current-Output | 25A |
| Output-Configuration | Positive |
| Output Voltage | 0.7V |
| Voltage-Output-Max | 5.5V |
| Synchronous-Rectifier | Yes |
| Voltage-Input-Min | 4.5V |
| Voltage-Input-Max | 20V |
| Maximum Operating Temperature | + 85 C |
| Operating temperature range | - 40 C |
| Output-Voltage | 700 mV to 5.5 V |
| Input-Voltage-MAX | 20 V |
| Output-Current | 25 A |
| Switching-Frequency | 300 kHz to 1 MHz |
| Input-Voltage-MIN | 4.5 V |
| Part-#-Aliases | MAX8686 |
| Package-Case | TQFN-40 |
Form,Package,Functional compatible component
Descriptions
Buck Switching Regulator IC Positive Adjustable 0.7V 1 Output 25A
40-WFQFN Exposed Pad
Voltage Regulators - Switching Regulators Multiphase Step-Down
DC/DC Converter
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FAQ
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A: We are original manufacturer OF Integrated Circuit Chip . We can do OEM/ODM business.
Q: How long is your delivery time?
A: Group buying delivery time: 30-60 days; General delivery time: 20
days.
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Q: What is the warranty ?
A: The free warranty is one year from the day of Commissioning
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warranty period, we will repair it and change the fault assembly
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