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Overview
| Topology | Buck Converter |
| Input voltage | 2.25-5.5 V |
| Switching frequency | 1000-3000 kHz |
| Output 1 | 3.3 V / 3 A |
Description
The LTC®3307A 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, this regulator achieves fast transient response with small external components. Silent Switcher architecture minimizes EMI emissions. The LTC3307A 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 batterypowered 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 low profile 12-lead 2mm × 2mm × 0.74mm LQFN package with 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
Typical applications
- Distributed DC Power Systems (POL), FPGA, ASIC, μP Core Supplies
- Optical Networking, Servers, Telecom, Communications
- Automotive
- Industrial
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | L(µH) | IR(A) | ISAT1(A) | ISAT2(A) | RDC max.(mΩ) | fres(MHz) | ISAT(A) | RDC(mΩ) | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-LQS SMT Power Inductor, 0.16 µH, 3.7 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-LQS SMT Power Inductor | Inductance0.16 µH | Rated Current3.7 A | – | – | – | Self Resonant Frequency644 MHz | Saturation Current7 A | DC Resistance16 mΩ | ||||
 | WE-PMCI Power Molded Chip Inductor, 0.24 µH, 6.9 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PMCI Power Molded Chip Inductor | Inductance0.24 µH | Rated Current6.9 A | Saturation Current 12.8 A | Saturation Current 26.7 A | DC Resistance21 mΩ | Self Resonant Frequency280 MHz | Saturation Current5.4 A | – | ||||
| WE-PMCI Power Molded Chip Inductor, 0.47 µH, 5.4 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PMCI Power Molded Chip Inductor | Inductance0.47 µH | Rated Current5.4 A | Saturation Current 12.95 A | Saturation Current 26.3 A | DC Resistance30 mΩ | Self Resonant Frequency165 MHz | Saturation Current4.2 A | – | ||||
 | WE-PMCI Power Molded Chip Inductor, 0.47 µH, 7.35 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PMCI Power Molded Chip Inductor | Inductance0.47 µH | Rated Current7.35 A | Saturation Current 13.6 A | Saturation Current 27.4 A | DC Resistance29 mΩ | Self Resonant Frequency150 MHz | Saturation Current5 A | – | ||||
 | WE-PMCI Power Molded Chip Inductor, 0.47 µH, 6.8 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PMCI Power Molded Chip Inductor | Inductance0.47 µH | Rated Current6.8 A | Saturation Current 13.75 A | Saturation Current 27.9 A | DC Resistance22 mΩ | Self Resonant Frequency140 MHz | Saturation Current6 A | – |