MAX1993
PRODUCTIONQuick-PWM Step-Down Controllers with Inductor Saturation Protection and Dynamic Output Voltages
Quick-PWM Step-Down Controllers with Inductor Saturation Protection and Dynamic Output Voltages
- Part Models
- 2
- 1ku List Price
- Starting From $6.25
Overview
- 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
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 low-voltage 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 synchronous-rectifier 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.
Applications
- 1.8V and 2.5V Supplies
- Active Termination Buses (MAX1993)
- Core/IO Supplies as Low as 0.7V
- CPU/Chipset/GPU with Dynamic Voltage Cores
- DDR Memory Termination (MAX1993)
- Notebook Computers
Documentation
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| MAX1993ETG+ | 24-TQFN-4X4X0.75 | ||
| MAX1993ETG+T | 24-TQFN-4X4X0.75 |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Sep 23, 2026 - 2026-0082 ASSEMBLY |
||
| MAX1993ETG+ | PRODUCTION | |
| MAX1993ETG+T | PRODUCTION | |
|
Jun 20, 2016 - 1612 ASSEMBLY |
||
| MAX1993ETG+ | PRODUCTION | |
| MAX1993ETG+T | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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| Parts | Product Life Cycle | Description |
|---|---|---|
| Switching Regulators & Controllers 6 | ||
| MAX1714 | PRODUCTION | High-Speed Step-Down Controller for Notebook Computers |
| MAX1844 | Obsolete | High-Speed Step-Down Controller with Accurate Current Limit for Notebook Computers |
| MAX1791 | PRODUCTION | High-Efficiency, 10-Pin µMAX, Step-Down Controllers for Notebooks |
| MAX1762 | Obsolete | High-Efficiency, 10-Pin µMAX, Step-Down Controllers for Notebooks |
| MAX1809 | PRODUCTION | 3A, 1MHz, DDR Memory Termination Supply |
| MAX1644 | PRODUCTION | 2A, Low-Voltage, Step-Down Regulator with Synchronous Rectification and Internal Switches |
Evaluation Kits
Evaluation Kit for the MAX1992, MAX1993
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