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MAX8811
High-Speed, Dual-Phase Driver with Integrated Boost Diodes
High Gate-Drive Strength Provides Extremely Fast Rise and Fall Times, Allowing Designers to Use Either Low-Cost (High Gate Capacitance) MOSFETs or Drive Multiple Parallel MOSFETs in High-Current Applications
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Status
Active: In Production.
Description
The MAX8811 2-phase gate driver controls power
MOSFETs in multiphase synchronous step-down converter
applications, providing up to 30A output current
per phase. The MAX8811 and MAX8810A (multiphase
power-supply controller) combine to provide an efficient,
low-cost solution for a wide range of multiphase power-supply
applications. The MAX8811 handles system input
voltages up to 26V. Each MOSFET driver is capable of
driving 3000pF capacitive loads with 11ns typical rise
and fall times.
Adaptive shoot-through protection circuitry is implemented
to prevent shoot-through currents for the "high-side
off to low-side on" transition. A programmable
delay is provided for the "low-side off to high-side on"
transition. This maximizes overall converter efficiency
while supporting operation with a variety of MOSFETs.
The MAX8811 provides an easy upgrade path from the
MAX8523 dual driver. Integrated bootstrap diodes
reduce external component count, while an enable
input provides flexibility for power sequencing. The
MAX8811 is available in a space-saving, 16-pin QSOP.
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Data Sheet
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Key Features
- Dual-Phase Synchronous Buck Driver
- Integrated Bootstrap Diodes
- Up to 26V System Input Voltage
- 6A Peak Gate Drive Current
- Capable of 30A per Phase
- 0.4Ω/0.9Ω Low-Side, 0.7Ω/1.0Ω High-Side Drivers (typ)
- Typical 11ns Rise/Fall Times with 3000pF Load
- Adaptive Dead-Time Control
- User-Programmable Delay Time
- Enable Function with 0.04µA (typ) Quiescent Current in Shutdown
- Space-Saving, Lead-Free, 16-Pin QSOP
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Applications/Uses
- DC-DC Converter Modules
- Multiphase Buck Converters
- Processor Core Voltage Regulators
- Switching Power Supplies
- Voltage-Regulator Modules (VRMs)
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Key Specifications:
| Step-Down Switching Regulators |
| Part Number |
VIN
(V) |
VIN
(V) |
Max. IOUT
(A) |
Max. IOUT
(A) |
DC-DC Outputs |
Package/Pins |
Smallest Available Pckg.
(mm2) |
Budgetary Price |
| min |
max |
≥ |
≤ |
max w/pins |
See Notes |
| MAX8811 |
4.5 |
26 |
30 |
30 |
2 |
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30.9 |
$2.93 @1k |
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See All Step-Down Switching Regulators (284)
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Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
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Diagram
 Typical Operating Circuit
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Information Index
Document Ref.: 19-3974
Rev 1;
2007-06-12
This page last modified: 2007-08-17
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