Analog Devices Inc. MAX17760 Step-Down DC-DC Converter
Analog Devices MAX17760 Step-Down DC-DC Converter is a high-efficiency, high-voltage, Himalaya synchronous device with integrated MOSFETs operating over an input-voltage range of 4.5V to 76V. The converter can deliver up to 300mA current. Output voltage is programmable from 0.8V up to 88% of input voltage (VIN). Built-in control loop compensation eliminates the need for external components. The MAX17760 features a peak-current-mode control architecture. The device can be operated in either forced pulse-width modulation (PWM) or pulse-frequency modulation (PFM) control schemes. Forced PWM mode provides constant frequency operation at all loads for frequency-sensitive applications, while PFM mode provides superior light-load efficiency by skipping pulses. The Analog Devices MAX17760 Step-Down DC-DC Converter integrates an open-drain active-low RESET output voltage monitor, adjustable input undervoltage lockout (EN/UVLO), and programmable soft-start. The feedback voltage regulation accuracy over -40°C to +125°C is +1.6% to -1.7%. The Analog Devices MAX17760 is available in a compact 12-pin (3mm x 3mm) TDFN package.Features
- Reduces external components and total cost
- No Schottky-synchronous operation
- Internal compensation components
- All-ceramic capacitors, compact layout
- Reduces the number of DC-DC regulators to stock
- Wide 4.5V to 76V input
- Adjustable output range from 0.8V up to 88% of VIN
- Up to 300mA output current
- 200kHz, 300kHz, 400kHz, and 600kHz programmable switching frequency with external clock synchronization
- Reduces power dissipation
- 93% peak efficiency
- PFM Mode enables enhanced light-load efficiency
- EXTVCC bootstrap input for improved efficiency
- 5µA shutdown current
- Operates reliably in adverse industrial environments
- Built-in hiccup mode overload protection
- Programmable soft-start and pre-biased power-up
- Built-in output-voltage monitoring with active-low RESET
- Programmable EN/UVLO threshold
- Overtemperature protection
- CISPR 22 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
Functional Block Diagram
Opublikowano: 2020-07-10
| Zaktualizowano: 2024-06-07
