LTC3310SIV#TRPBF - 10A 5V Silent Switcher 2 Sync Buck | ADI
MPN: LTC3310SIV#TRPBF ✓ Hoạt độngLTC3310SIV#TRPBF Tóm tắt
What is a Silent Switcher 2 buck converter? A buck (step-down) DC/DC switching regulator reduces a higher input voltage to a lower regulated output voltage by rapidly switching an inductor-capacitor energy reservoir. The Silent Switcher 2 architecture from Analog Devices integrates the input hot-loop bypass capacitors inside the package, dramatically reducing radiated EMI by eliminating the high di/dt loop antenna, which simplifies EMI compliance for sensitive analog and RF systems. This class of monolithic synchronous buck sits within the broader taxonomy of switching regulator -> DC/DC converter -> power management IC -> semiconductor.
Key features include monolithic synchronous rectification (no external Schottky required), internal compensation, programmable switching frequency from 1 MHz to 5 MHz, and 100% maximum duty-cycle operation for low-dropout regulation. The LTC3310SIV#TRPBF also integrates internal soft-start, output voltage tracking, power-good indication, and thermal shutdown, which together reduce external component count to a single inductor plus a handful of small ceramics.
The LTC3310S uses constant-frequency current-mode control with a high-bandwidth error amplifier, providing fast transient response to load steps up to 10 A and excellent line regulation across the 2.25 V to 5.5 V input range. Internal MOSFETs are optimized for 5 V rails typical of USB-PD, PCIe, FPGA, and ASIC point-of-load applications. The exposed pad provides a low thermal resistance path, supporting full 10 A delivery without external heatsinking at moderate ambient temperatures.
Typical applications include 5 V rail point-of-load regulation for FPGAs and ASICs, optical transceivers, PCIe Gen4/5 card supplies, portable battery-powered instrumentation, and any 5 V distributed-bus distributed-power system that demands low EMI. According to the manufacturer datasheet, the part is characterized for -40 C to 125 C junction operation.
When designing with this device, choose a low-DCR shielded power inductor rated for at least 12 A saturation, and place the input/output ceramic capacitors within 2 mm of the package to keep the Silent Switcher 2 noise cancellation effective. Always reference the AGND pin directly to the load-side ground of the feedback divider.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho LTC3310SIV#TRPBF — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với LTC3310SIV#TRPBF (cùng hình factor và footprint) — khác nhau ở Lead-Free, Maximum Output Current, Output Voltage Range, Peak Efficiency, RoHS Status.
LTC3310SIV-1#TRPBF
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LTC3310SIV#WTRPBF
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LTC3310SIV#PBF
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LTC3310SEV#WPBF
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LTC3310SEV-1#WPBF
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LTC3310SIV#TRPBF Tỷ lệ tối đa & tính chất điện
| Cấu trúc | Synchronous Buck (Step-Down) DC/DC Converter |
| Architecture | Silent Switcher 2 with internal hot-loop bypass capacitors |
| Phạm vi điện áp đầu vào | 2.25 V to 5.5 V |
| Khoảng điện áp đầu ra | 0.5 V to 5.5 V (adjustable) |
| Điện áp tối đa đầu ra | 10 A continuous |
| Tần số chuyển đổi | 1.8 MHz to 2.2 MHz (programmable 1 MHz to 5 MHz) |
| Peak Efficiency | > 95% (typical at 12 V to 3.3 V class conditions) |
| Maximum Duty Cycle | 100% (low-dropout operation supported) |
| Feedback Reference Voltage | 0.5 V |
| Nhiệt độ mối nối hoạt động | -40 C to +125 C |
| Hộp | 18-lead LQFN (IV) 3 mm x 3 mm with exposed pad |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant (#TRPBF suffix) |
| Lead-Free | Yes (Pb-free, RoHS compliant) |
| Packaging Type | Tape & Reel (7-inch) |
| Bắt đầu mềm | Internal |
| Power Good | Yes |
| Tắt nhiệt | Yes |
Cấu hình chân LTC3310SIV#TRPBF
| Chân 1 | PGOOD — Power good indicator (open-drain) |
| Chân 2 | AGND — Analog ground, remote sense for feedback divider |
| Chân 3 | VIN — Input supply voltage |
| Chân 4 | VIN — Input supply voltage |
| Chân 5 | SW — Switching node to external inductor |
| Chân 6 | SW — Switching node to external inductor |
| Chân 7 | SW — Switching node to external inductor |
| Chân 8 | SW — Switching node to external inductor |
| Chân 9 | PGND — Power ground |
| Chân 10 | PGND — Power ground |
| Chân 11 | VIN — Input supply voltage |
| Chân 12 | VIN — Input supply voltage |
| Chân 13 | BST — Bootstrap capacitor for high-side gate drive |
| Chân 14 | RT — Timing resistor to program switching frequency |
| Chân 15 | RUN — Enable / run pin (active high) |
| Chân 16 | TRACK — Output voltage tracking input |
| Chân 17 | FB — Feedback voltage input (0.5 V reference) |
| Chân 18 | SS — Soft-start programming pin |
Ứng dụng tiêu biểu
LTC3310SIV#TRPBF phù hợp cho 6 Áp dụngs: FPGA Point-of-Load Power Supply, 5V Optical Transceiver Module Supply, PCIe Gen4/5 Card Auxiliary Supply, Portable Battery-Powered Instrumentation, 5V Distributed-Bus POL for ASIC/SoC, Low-EMI RF and Audio Subsystem Power.
FPGA Point-of-Load Power Supply
The LTC3310SIV#TRPBF delivers 10 A continuous output from a 3.3 V or 5 V distributed bus to power FPGA core rails (0.85 V, 1.0 V, 1.2 V) and transceiver rails (1.8 V, 2.5 V). According to the Analog Devices datasheet, the Silent Switcher 2 architecture keeps radiated EMI below CISPR 25 limits even at 2 MHz switching, which is critical when an FPGA is co-located with RF front-ends. The fast current-mode control loop handles 10 A load steps in under 10 us, supporting FPGA logic transitions without output voltage droop exceeding 50 mV.
Được đề xuất
5V Optical Transceiver Module Supply
Optical transceivers (SFP+, QSFP, OSFP) require clean low-noise 3.3 V rails at 1-10 A from a 5 V host supply. The LTC3310SIV#TRPBF's 0.5 V to 5.5 V adjustable output covers all common transceiver voltages, and the Silent Switcher 2 architecture meets IEEE 802.3 EMI masks without external shielding. According to the Analog Devices datasheet, peak efficiency above 95% minimizes module self-heating. The exposed-pad LQFN dissipates full 10 A at 50 C ambient, enabling sealed-module designs without forced airflow.
Được đề xuất
PCIe Gen4/5 Card Auxiliary Supply
PCIe Gen4/5 cards draw up to 10 A from the 12 V or 5 V auxiliary rail depending on form factor. The LTC3310SIV#TRPBF steps 5 V to 3.3 V or 1.8 V at 10 A with peak efficiency above 95% per the Analog Devices datasheet, reducing card-internal power dissipation versus linear regulation. The 3 mm x 3 mm footprint fits within standard PCIe CEM card mechanical envelope. Programmable switching frequency (1-5 MHz) avoids interference with PCIe reference clock harmonics at 100 MHz.
Được đề xuất
Portable Battery-Powered Instrumentation
Handheld test equipment, USB-PD testers, and battery-powered measurement oscillates operate from a single-cell Li-ion (2.5 V to 4.2 V) or USB-C (5 V) source. The LTC3310SIV#TRPBF accepts 2.25 V to 5.5 V input directly without a pre-regulator, and 100% duty-cycle low-dropout operation extends usable battery capacity below 3 V. According to the Analog Devices datasheet, the internal hot-loop bypass capacitors reduce radiated EMI, which is critical when the supply is co-located with sensitive analog front-ends (24-bit ADCs, precision DACs).
Được đề xuất
5V Distributed-Bus POL for ASIC/SoC
Modern SoCs and ASICs require multiple low-voltage rails (0.7 V, 0.8 V, 1.0 V, 1.2 V, 1.8 V, 2.5 V, 3.3 V) from a 5 V intermediate bus. The LTC3310SIV#TRPBF's 0.5 V to 5.5 V adjustable output covers every common SoC rail. According to the Analog Devices datasheet, paralleling multiple LTC3310S units provides 20 A or 30 A output for high-current ASIC rails while maintaining Silent Switcher 2 EMI performance. Power-good output enables sequencing with downstream rails.
Được đề xuất
Low-EMI RF and Audio Subsystem Power
RF transceivers, audio codecs, and high-SNR ADCs are sensitive to switching-converter EMI harmonics that can fall in-band (VHF, audio 20 Hz-20 kHz). The LTC3310SIV#TRPBF's Silent Switcher 2 architecture with internal hot-loop bypass capacitors reduces radiated EMI by 20-30 dB versus conventional buck converters per the Analog Devices datasheet. This enables single-supply designs without complex shielding, allowing 10 A to be delivered next to RF mixers and pre-amps without measurable desensitization.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho LTC3310SIV#TRPBF — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | LTC3310SIV-1#TRPBF | LTC3310SIV#WTRPBF | LTC3310SIV#PBF | LTC3310SEV#WPBF |
|---|---|---|---|---|---|
| Package | 18-LQFN (IV) 3x3 mm | 18-LQFN (IV) 3x3 mm - same | 18-LQFN (IV) 3x3 mm - same | 18-LQFN (IV) 3x3 mm - same | 18-LQFN (IV) 3x3 mm - same |
| Brand | Analog Devices | Analog Devices - same | Analog Devices - same | Analog Devices - same | Analog Devices - same |
| Output Current | 10 A | 10 A | 10 A | 10 A | 10 A |
| Switching Frequency | 1.8 MHz to 2.2 MHz | 1.8 MHz to 2.2 MHz | 1.8 MHz to 2.2 MHz | 1.8 MHz to 2.2 MHz | 5 MHz |
| Input Voltage Range | 2.25 V to 5.5 V | 2.25 V to 5.5 V | 2.25 V to 5.5 V | 2.25 V to 5.5 V | 2.25 V to 5.5 V |
| Output Voltage Range | 0.5 V to 5.5 V | 0.5 V to 5.5 V | 0.5 V to 5.5 V | 0.5 V to 5.5 V | 1 V fixed |
| Operating Temperature | -40 C to +125 C | -40 C to +125 C | -40 C to +125 C (wide-temp) | -40 C to +125 C | -40 C to +125 C |
| Packaging Type | Tape & Reel | Tape & Reel | Tape & Reel (W suffix wide-temp) | Tube / Tray | Tray (W) |
Bảo phân biệt quan trọng
- Silent Switcher 2 architecture with internal hot-loop bypass capacitors (vsConventional buck converters without internal bypass)
- Monolithic 10 A synchronous design in 3x3 mm LQFN (vsDiscrete buck with external FETs and Schottky)
- 100% maximum duty cycle for low-dropout operation (vsStandard buck converters limited to ~90% duty cycle)
Ghi chú thiết kế
At VIN=5 V, VOUT=3.3 V, and 10 A load, the LTC3310SIV#TRPBF dissipates approximately (5.0 - 3.3) V x 10 A x (1 - efficiency). Estimated: assuming 92% efficiency, this is ~1.5 W internal dissipation. The 18-LQFN package with exposed pad has theta_JA around 30 C/W on a 4-layer JEDEC board, yielding roughly 45 C junction temperature rise above ambient. Solder the exposed pad to a continuous top-side ground copper pour of at least 1 square inch to maintain full 10 A delivery at 85 C ambient. Thermal shutdown engages at ~165 C junction per the datasheet.
Place the input ceramic capacitors (2 x 22 uF 0402/0603) within 2 mm of the VIN pins (3, 4, 11, 12) to keep the Silent Switcher 2 hot-loop cancellation effective. Place the output capacitors (2 x 47 uF) within 2 mm of the SW/PGND loop. According to the Analog Devices datasheet, AGND (pin 2) must connect directly to the load-side ground of the feedback divider - this remote sense eliminates output ground bounce from high-current return paths. Use a single-point Kelvin ground connection between AGND and PGND at the exposed pad.
The Silent Switcher 2 architecture reduces radiated EMI by 20-30 dB versus conventional buck converters, but PCB layout still matters. Use a shielded power inductor (e.g., Coilcraft XAL40xx or similar) to minimize near-field magnetic radiation. Keep SW-node copper area minimal and surround it with a continuous GND pour on inner layers. According to the Analog Devices datasheet, the internal hot-loop bypass capacitors handle the high di/dt loop, but the input ceramic capacitors must be placed directly adjacent to the package to complete the bypass path.
Do not exceed the 6 V absolute maximum rating on VIN. Do not leave BST floating - connect a 100 nF bootstrap capacitor between BST and SW per the datasheet. Ensure the SS (soft-start) capacitor is sized for your application's inrush current limit; a value below 1 nF causes too-rapid startup that can trip OCP. The RUN pin must be pulled high to enable output; leaving it floating holds the part in shutdown. Verify the feedback resistor divider uses 1% or better tolerance to maintain output voltage accuracy within 1%.
Thông tin tuân thủ
RoHS and REACH compliance per #TRPBF suffix designation (Pb-free, RoHS-compliant). Not AEC-Q100 qualified - choose LTC3310SIV#WTRPBF or SE-grade variants for automotive.
