MAX16992
36V, 2.5MHz Automotive Boost/SEPIC Controllers
2.5MHz Automotive PWM Controller Enables Space-Efficient Preboost Supplies for Cold/Warm Crank Applications
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Overview
Features and Benefits
- Minimized Radio Interference with 2.5MHz Switching Frequency Above the AM Radio Band
- Space-Efficient Solution Design with Minimized External Components
- 100kHz to 1MHz (MAX16990) and 1MHz to 2.5MHz (MAX16992) Switching-Frequency Ranges
- 12-Pin TQFN (3mm x 3mm) and 10-Pin µMAX Packages
- Spread Spectrum Simplifies EMI Management Design
- Flexibility with Available Configurations for Boost, SEPIC, and Multiphase Applications
- Adjustable Slope Compensation
- Current-Mode Control
- Internal Soft-Start (9ms)
- Protection Features Support Robust Automotive Applications
- Operating Voltage Range Down to 4.5V (2.5V or Lower in Bootstrapped Mode), Immune to Load- Dump Transient Voltages Up to 42V
- PGOOD Output and Hiccup Mode for Enhanced System Protection
- Overtemperature Shutdown
- -40°C to +125°C Operation
Product Details
The MAX16990/MAX16992 are high-performance, current-mode PWM controllers with 4µA (typ) shutdown current for wide input voltage range boost/SEPIC converters. The 4.5V to 36V input operating voltage range makes these devices ideal in automotive applications such as for front-end “preboost” or “SEPIC” power supplies and for the first boost stage in high-power LED lighting applications. An internal low-dropout regulator (PVL regulator) with a 5V output voltage enables the MAX16990/MAX16992 to operate directly from an automotive battery input. The input operating range can be extended to as low as 2.5V when the converter output is applied to the SUP input.
There are multiple versions of the devices offering one or more of the following functions: a synchronization output (SYNCO) for two-phase operation, an overvoltage protection function using a separate input pin (OVP), and a reference input pin (REFIN) to allow on-the-fly output voltage adjustment.
The MAX16990 and MAX16992 operate in different frequency ranges. All versions can be synchronized to an external master clock using the FSET/SYNC input.
In addition, the MAX16990/MAX16992 have a factory-programmable spread-spectrum option. Both devices are available in compact 12-pin TQFN and 10-pin µMAX® packages.
Applications
- Automotive Audio/Navigation Systems
- Automotive LED Lighting
- Dashboards
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At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
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