Analog Devices / Maxim Integrated MAX17644 Himalaya uSLIC™ DC-DC Converters

Analog Devices Inc. MAX17644 Himalaya uSLIC™ Step-Down DC-DC Converters are high-efficiency, high-voltage, Himalaya synchronous step-down DC-DC converters with integrated MOSFETs operating over an input-voltage range of 4.5V to 36V. The MAX17644 DC-DC Converters are available in three variants: MAX17644A, MAX17644B, and MAX17644C, all delivering up to 2.7A of current. The MAX17644A offers a 3.3V fixed output and the MAX17644B 5V fixed output, while the MAX17644C has an adjustable output voltage from 0.9V up to 90% of V_IN.

ADI MAX17644 Converters have a peak-current mode control architecture. The MAX17644 Converters have the option of being operated in the forced pulse width modulation (PWM), or pulse-frequency modulation (PFM), or discontinuous-conduction mode (DCM). These modes enable high efficiency under full-load and light-load conditions. The MAX17644 Converters offer a low minimum on-time that achieves high switching frequencies and smaller solution size.

The feedback-voltage regulation accuracy over -40°C to +125°C for the MAX17644 is ±1.2%. The device is housed in a 16-pin (3mm x 3mm) TQFN package.

Features

Reduces external components and total cost
- No schottky – synchronous operation
- Internal compensation components
- All-ceramic capacitors, compact layout
Reduces number of DC-DC regulators to stock
- Wide 4.5V to 36V Input
- Adjustable output voltage range from 0.9V up to 90% of V_IN
- Delivers up to 2.7A over the temperature range
- 400kHz to 2.2MHz Adjustable frequency with external clock synchronization
- Available in a 16-Pin, 3mm x 3mm TQFN package

Reduces power dissipation
- Peak Efficiency of 95.41%
- PFM and DCM Modes enable enhanced light load efficiency
- Auxiliary Bootstrap Supply (EXTVCC) for improved efficiency
- 2.8μA Shutdown current
Operates reliably in adverse industrial environments
- Hiccup-mode overload protection
- Adjustable and monotonic startup with prebiased output voltage
- Built-in output-voltage monitoring with RESET
- Programmable EN/UVLO threshold
- Overtemperature protection
- CISPR32 Class B compliant
- Wide -40°C to +125°C ambient operating temperature range / -40°C to +150°C junction temperature range

Applications

Industrial control power supplies
General-purpose point-of-load
Distributed supply regulation

Base station power supplies
Wall transformer regulation
High voltage single-board systems

Analog Devices / Maxim Integrated MAX17644 Himalaya uSLIC™ DC-DC Converters

Features

Applications

Simplified Application Circuit

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