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IC / 1992E / MAX1992ETG / QFN-24

تولید کننده: MAXIM
مدل کالا: MAX1992ETG
موجودی:
تماس 8893- 6186
قیمت: 0تومان

1992E - MAX1992ETG – MAXIM-QFN-24

Quick-PWM Step-Down Controllers with Inductor Saturation Protection and Dynamic Output Voltages

کنترل گام به پایین با سلف و ولتاژ های خرجی پویا

 

General Description

 

The MAX1992/MAX1993 pulse-width modulation (PWM) controllers provide high-efficiency, excellent transient response, and high DC output accuracy. The devices step down high-voltage batteries to generate lowvoltage CPU core or chipset/RAM supplies in notebook computers

Maxim’s proprietary Quick-PWM™ quick-response, constant on-time PWM control scheme handles wide input/output voltage ratios with ease and provides 100ns “instant-on” response to load transients, while maintaining a relatively constant switching frequency. Efficiency is enhanced by the ability to drive very large synchronousrectifier MOSFETs. Current sensing to ensure reliable overload and inductor saturation protection is available using an external current-sense resistor in series with the output. Alternatively, the controller can sense the current across the synchronous rectifier alone or use lossless inductor sensing for lowest power dissipation

Single-stage buck conversion allows the MAX1992/MAX1993 to directly step down high-voltage batteries for the highest possible efficiency. Alternatively, two-stage conversion (stepping down from another system supply rail instead of the battery) at the maximum switching frequency allows the minimum possible physical size

The MAX1992 powers the CPU core, chipset, DRAM, or other supply rails as low as 0.7V. The MAX1993 powers chipsets and graphics processor cores, which require dynamically adjustable output voltages. The MAX1993 provides a tracking input that can be used for active termination buses. The MAX1992/MAX1993 are available in a 24-pin thin QFN package with optional overvoltage and undervoltage protection

For dual step-down PWM controllers with inductor saturation protection, external reference input voltage, and dynamically selectable output voltages, refer to the MAX1540/MAX1541 data sheet

 

Features

Inductor Saturation Protection

 Accurate Current Limit

 Ultra-High Efficiency

 Quick-PWM with 100ns Load-Step Response

 MAX1992

1.8V/2.5V Fixed or 0.7V to 5.5V Adjustable Output Range

 MAX1993

External Reference Input

Dynamically Selectable Output Voltage /0.7V to 5.5V

Optional Power-Good and Fault Blanking

During Transitions

 ±1% VOUT Accuracy Over Line and Load

 2V to 28V Battery Input Range /VIN

 200/300/450/600kHz Switching Frequency

 Overvoltage/Undervoltage Protection Option

 1.7ms Digital Soft-Start

 Drives Large Synchronous Rectifier FETs

 2V ±0.7% Reference Output

Power-Good Window Comparator

 

Applications

 

Notebook Computers

Core/IO Supplies as Low as 0.7V

1.8V and 2.5V Supplies

DDR Memory Termination /MAX1993

Active Termination Buses /MAX1993

CPU/Chipset/GPU with Dynamic Voltage Cores /MAX1993

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