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| 型号： | MAX5043ETN+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 1/22页 |
| 文件大小： | 0K |
| 描述： | IC PWR W/MOSFET HS 56-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 系列： | * |
19-3046; Rev 3a; 9/04
ATION
EVALU
AVAIL
KIT
ABLE
Two-Switch Power ICs with Integrated
Power MOSFETs and Hot-Swap Controller
General Description
The MAX5042/MAX5043 isolated multimode PWM power
ICs feature integrated switching power MOSFETs con-
nected in a voltage-clamped, two-transistor, power-circuit
configuration. These devices operate from a wide 20V to
76V input voltage range. The MAX5042 includes a hot-
swap controller for use with an external power MOSFET to
limit inrush current for applications where the power sup-
ply is plugged into a live power backplane. The MAX5043
does not include a hot-swap controller.
The voltage-clamped power topology of the MAX5042/
MAX5043 enables full recovery of stored magnetizing
and leakage inductive energy for enhanced efficiency
and reliability. Operating at up to 500kHz switching fre-
quency, these devices provide up to 50W of output
power. The MAX5042/MAX5043 allow the implementa-
tion of both forward and flyback voltage or current-mode
converter topologies. A dedicated latched external shut-
down provides protection in addition to internal thermal
shutdown.
The MAX5042/MAX5043 achieve higher efficiency when
used with secondary-side synchronous rectification.
These devices generate a look-ahead signal for driving
secondary-side synchronous rectifiers.
The MAX5042/MAX5043 are rated for operation over the
-40°C to +125°C and -40°C to +85°C temperature
range, respectively, and are available in a small surface-
mount 56-pin thin QFN package.
Warning: The MAX5042/MAX5043 are designed to
work with high voltages. Exercise caution.
Applications
Features
? Reliable Single-Stage Clamped Two-Switch Power
ICs for High Efficiency
? No Reset Winding Required
? Up to 50W Output Power
? Integrated High-Voltage 75m ? Power MOSFETs
? 20V to 76V Wide Input Voltage Range
? Feed-Forward Voltage or Current-Mode Control
? Programmable Brownout Undervoltage Lockout
? Integrated Current Signal Amplifier for High-
Efficiency, Current-Mode Control
? Internal Overtemperature Shutdown
? Indefinite Short-Circuit Protection
? Integrated Thermally Protected High-Voltage
Startup Linear Regulator
? Integrated Hot-Swap Controller (MAX5042)
? Integrated Look-Ahead Signal Output Drives
High-Speed Optocoupler for Secondary-Side
Synchronous Rectification
? >90% Efficiency with Synchronous Rectification
? Up to 500kHz Switching Frequency
? High-Power, Small-Footprint 56-Pin Thermally
Enhanced QFN Package
Ordering Information
High-Efficiency Telecom/Datacom Power
Supplies
Router/Switch Cards with 48V Backplane Power
Systems
PART
MAX5042 ATN
MAX5043 ETN
TEMP RANGE
-40°C to +125°C
-40°C to +85°C
PIN-PACKAGE
56 Thin QFN
56 Thin QFN
Servers with 48V Backplane Power Systems
xDSL Line Cards
xDSL Line-Driver Power Supplies
Selector Guide
Distributed Power Systems with 48V Bus
42V Automotive Power Supplies
Power-Supply Modules
Pin Configurations appear at end of data sheet.
PART
MAX5042
MAX5043
DESCRIPTION
Two-Switch Power IC with Integrated Power
MOSFETs and Hot-Swap Controller for Isolated
Power Supplies
Two-Switch Power IC with Integrated Power
MOSFETs for Isolated Power Supplies
________________________________________________________________ Maxim Integrated Products
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.
1
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