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Analog Devices LTC3302A | Demoboard DC3251A
Evaluating the LTC3302A, 3.3 V to 1.2 V at 2 A, 2 MHz Synchronous Step-Down Regulator in a 2 mm × 2 mm SWF FCQFN
Overview
| Topology | Buck Converter |
| Input voltage | 2.25-5.5 V |
| Switching frequency | 1600-2400 kHz |
| Output 1 | 1.22 V / 2 A |
Description
Demonstration Circuit DC3251A features the LTC3302A, 5 V, 2 A synchronous step-down silent switcher operating as a 2 MHz, 3.3V to 1.2 V, 2 A buck regulator. The LTC3302A supports adjustable output voltages from 0.5 V to VIN. The LTC3302A is a compact,high efficiency, and high-speed synchronous monolithic step-down switching regulator. A minimum on-time of 27 ns enables high VIN to low VOUT conversion.The DC3251A operating mode can be selected as Burst Mode operation, skip (PS) or forced continuous (FC) mode. Setting JP1 to the SKIP position allows the LTC3302A to sync to a clock frequency from 1.6 MHz to 2.4 MHz. The LTC3302A operates in forced continuous mode when syncing to an external clock.The DC3251A also has an EMI filter to reduce conducted EMI. This EMI filter can be included by applying the input voltage at the VIN EMI terminal. The EMI performance of the board is shown in the EMI Test Results section. The red lines in the EMI performance graphs show the CISPR25 Class 5 peak limits for the conducted and radiated emission tests.
Features
- LTC3302A evaluation board
- Transient circuit included for load-transient evaluation
- EMI filter included to reduce noise in EMI emission tests
Typical applications
- Optical Networking, and Communications
- Servers & Telecom Power Supplies, Distributed DC Power Systems (POL), FPGA, ASIC
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | L(µH) | IRP,40K(A) | ISAT,30%(A) | RDC typ.(mΩ) | fres(MHz) | VOP(V) | Pins | Type | Mount | L(mm) | H(mm) | IR(A) | Working Voltage(V (AC)) | Operating Temperature | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-MAPI SMT Power Inductor, 0.68 µH, 3.3 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-MAPI SMT Power Inductor | Inductance0.68 µH | Performance Rated Current3.3 A | Saturation Current @ 30%5.9 A | DC Resistance65 mΩ | Self Resonant Frequency130 MHz | Operating Voltage80 V | Pins2 | – | MountSMT | Length2 mm | Height1 mm | Rated Current2 A | – | Operating Temperature -40 °C up to +125 °C | ||||
 | WR-PHD Jumper, –, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Jumper | – | – | – | – | – | – | Pins2 | – | – | – | – | Rated Current3 A | Working Voltage200 V (AC) | Operating Temperature -25 °C up to +105 °C | |||
 | WR-PHD Pin Header, –, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Pin Header | – | – | – | – | – | – | Pins3 | TypeStraight | MountTHT | Length6 mm | – | Rated Current2 A | Working Voltage200 V (AC) | Operating Temperature -40 °C up to +105 °C | |||
 | WR-PHD Pin Header, –, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Pin Header | – | – | – | – | – | – | Pins4 | TypeStraight | MountTHT | Length8 mm | – | Rated Current2 A | Working Voltage200 V (AC) | Operating Temperature -40 °C up to +105 °C |