Analog Devices Inc. LTC3308A/B Synchronous Step-Down Silent Switcher™
Analog Devices Inc. LTC3308A/B Synchronous Step-Down Silent Switcher™ is a very small, high efficiency, low noise, monolithic synchronous 4A step-down DC/DC converter. It operates from a 2.25V to 5.5V input supply. Using constant frequency, peak current mode control at switching frequencies up to 3MHz, and minimum on-time as low as 22ns, this regulator achieves fast transient response with small external components. A Silent Switcher architecture minimizes EMI emissions.
The LTC3308x operates in forced continuous or pulse skip mode for low noise or low-ripple Burst Mode operation for high efficiency at light loads. This makes the device ideal for battery-powered systems. The IC regulates output voltages as low as 500mV. Other features include output overvoltage protection, short-circuit protection, thermal shutdown, clock synchronization, and up to 100% duty cycle operation for low dropout. The device is available in a low profile 12-lead 2mm×2mm×0.74mm LQFN package with an exposed pad for low thermal resistance.
Features
- High efficiency: 8mΩ NMOS, 31mΩ PMOS
- Programmable frequency to 3MHz
- Tiny inductor and capacitors
- Peak current-mode control
- 22ns minimum on-time
- Wide bandwidth, fast transient response
- Silent Switcher™ architecture
- Ultra-low EMI emissions
- Low ripple Burst Mode® operation with IQ of 40μA
- Safely tolerates inductor saturation in overload
- 2.25V to 5.5V VIN range
- 0.5V to VIN VOUT range
- ±1% over temperature range VOUT accuracy
- Precision 400mV enable threshold
- 1μA shutdown current
- Power Good, internal compensation and Soft Start
- Thermally enhanced 2mm×2mm LQFN package
- AEC-Q100 qualified for automotive applications
Applications
- Optical networking, servers, telecom
- Automotive, industrial, communications
- Distributed DC power systems (POL)
- FPGA, ASIC, μP core supplies
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Analog Devices Inc. Silent Switcher® Solutions for EMI Compliance
Delivers up to 95% efficiency at 2MHz & ultra-low EMI/EMC emissions.
Publicado: 2019-12-04
| Atualizado: 2022-03-11