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2.5V-36V, 2.5MHz, 4μA shutdown PWM boost controller

2.5V-36V, 2.5MHz, 4μA shutdown PWM boost controller

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By Graham Prophet



The converters use a constant-frequency, pulse-width modulating (PWM), peak current-mode control architecture. There are multiple versions of the devices offering one or more of the following functions: a synchronization output (SYNCO) for 180° out-of-phase operation, an overvoltage protection function using a separate input pin (OVP), and a reference input pin to allow on-the-fly output voltage adjustment.

 

The MAX17290 and MAX17292 operate in different frequency ranges. All versions can be synchronized to an external master clock. The devices are available in 12-pin (3 x 3 mm) TQFN and 10-pin μMAX packages. Both packages have exposed pads for -40°C to +85°C operation. Use it, Maxim suggests, in distributed supply regulation; general-purpose point-of-load; offline power supplies; and telecom hardware

 

Features include;

Reduced solution size and cost;

all-ceramic capacitor solution for small solution size

100 kHz to 1 MHz (MAX17290) and 1 MHz to 2.5 MHz (MAX17292) switching-frequency with external synchronization

Increased design flexibility;

bootstrapped mode allows input voltage to be 2.5V

adjustable slope compensation

Reduced power dissipation

>90% peak efficiency

4 μA (typ.) shutdown current

Reliability;

42V input voltage transient protection

Fixed 9 msec Internal software start reduces input inrush current

PGOOD output and hiccup mode for enhanced system protection

Overtemperature shutdown

Reduced EMI emission with spread-spectrum control

 

Maxim; www.maximintegrated.com/en/products/power/switching-regulators/MAX17290

 

 

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