LTC3310SIV#TRPBF - 10A 5V Silent Switcher 2 Sync Buck | ADI
N.º de pieza: LTC3310SIV#TRPBF ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $8.5 | $8,50 |
| 10 | $7.65 | $76,50 |
| 100 | $6.8 | $680,00 |
| 500 | $6.1 | $3.050,00 |
| 1.000 | $5.45 | $5.450,00 |
| 2.500 | $4.9 | $12.250,00 |
LTC3310SIV#TRPBF Descripción general
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.
Alternativas directas para LTC3310SIV#TRPBF — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con LTC3310SIV#TRPBF (mismo factor de forma y huella) — difiere en Lead-Free, Maximum Output Current, Output Voltage Range, Peak Efficiency, RoHS Status.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
LTC3310SIV-1#TRPBF
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LTC3310SIV#WTRPBF
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LTC3310SIV#PBF
✅ Sustitución directa✓ En stock
$5.45 / unidad
Ver hoja de datos →LTC3310SEV#WPBF
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LTC3310SEV-1#WPBF
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LTC3310SIV#TRPBF Valores máximos y características eléctricas
| Topología | Synchronous Buck (Step-Down) DC/DC Converter |
| Architecture | Silent Switcher 2 with internal hot-loop bypass capacitors |
| Rango de tensión de entrada | 2.25 V to 5.5 V |
| Rango de tensión de salida | 0.5 V to 5.5 V (adjustable) |
| Corriente de salida máxima | 10 A continuous |
| Frecuencia de conmutación | 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 |
| Temperatura de unión de funcionamiento | -40 C to +125 C |
| Encapsulado | 18-lead LQFN (IV) 3 mm x 3 mm with exposed pad |
| Tipo de montaje | Surface Mount |
| Estado RoHS | Compliant (#TRPBF suffix) |
| Lead-Free | Yes (Pb-free, RoHS compliant) |
| Packaging Type | Tape & Reel (7-inch) |
| Arranque suave | Internal |
| Power Good | Yes |
| Apagado térmico | Yes |
Configuración de pines de LTC3310SIV#TRPBF
| Pin 1 | PGOOD — Power good indicator (open-drain) |
| Pin 2 | AGND — Analog ground, remote sense for feedback divider |
| Pin 3 | VIN — Input supply voltage |
| Pin 4 | VIN — Input supply voltage |
| Pin 5 | SW — Switching node to external inductor |
| Pin 6 | SW — Switching node to external inductor |
| Pin 7 | SW — Switching node to external inductor |
| Pin 8 | SW — Switching node to external inductor |
| Pin 9 | PGND — Power ground |
| Pin 10 | PGND — Power ground |
| Pin 11 | VIN — Input supply voltage |
| Pin 12 | VIN — Input supply voltage |
| Pin 13 | BST — Bootstrap capacitor for high-side gate drive |
| Pin 14 | RT — Timing resistor to program switching frequency |
| Pin 15 | RUN — Enable / run pin (active high) |
| Pin 16 | TRACK — Output voltage tracking input |
| Pin 17 | FB — Feedback voltage input (0.5 V reference) |
| Pin 18 | SS — Soft-start programming pin |
Aplicaciones típicas
LTC3310SIV#TRPBF es adecuado para 6 aplicacións: 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.
Recomendado
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.
Recomendado
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.
Recomendado
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).
Recomendado
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.
Recomendado
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.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para LTC3310SIV#TRPBF — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | 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) |
Diferenciadores clave
- Silent Switcher 2 architecture with internal hot-loop bypass capacitors (frente a Conventional buck converters without internal bypass)
- Monolithic 10 A synchronous design in 3x3 mm LQFN (frente a Discrete buck with external FETs and Schottky)
- 100% maximum duty cycle for low-dropout operation (frente a Standard buck converters limited to ~90% duty cycle)
Notas de diseño
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%.
Información de cumplimiento
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.
