Analog Devices Inc. LTC3307A/B Step-Down Silent Switcher™
Analog Devices Inc. LTC3307A/B Step-Down Silent Switcher™ is a very small, high efficiency, low noise, monolithic synchronous 3A step-down DC-DC converter operating 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, the LTC3307A/B achieves fast transient response with small external components. The Silent Switcher architecture also minimizes EMI emissions.
The LTC3307A/B operates in forced continuous or pulse skip mode for low noise, or low-ripple Burst Mode operation for high efficiency at light loads, ideal for battery powered systems. The IC regulates output voltages as low as 500mV. Other features include output overvoltage/short-circuit protection, thermal shutdown, clock synchronization, and up to 100% duty cycle operation for low dropout. The device is available in a 2mm × 2mm × 0.74mm Low-Profile Quad Flat No-Lead (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
- Ultralow EMI Emissions
- Low Ripple Burst Mode® Operation with IQ of 40µA
- Safely Tolerates Inductor Saturation in Overload
- VIN Range: 2.25V to 5.5V
- VOUT Range: 0.5V to VIN
- VOUT Accuracy: ±1% Over Temperature Range
- Precision 400mV Enable Threshold
- Shutdown Current: 1µA
- Internal Compensation and Soft Start
- Power Good Output
- Thermally Enhanced 2mm × 2mm LQFN Package
Applications
- Optical Networking, Servers, Telecom
- Automotive, Industrial, Communications
- Distributed DC Power Systems (POL)
- FPGA, ASIC, µP Core Supplies
Related Products
Analog Devices Inc. Silent Switcher® Solutions for EMI Compliance
Delivers up to 95% efficiency at 2MHz & ultra-low EMI/EMC emissions.
Block Diagram
Typical Application Circuit
Published: 2019-10-09
| Updated: 2023-06-22