SP6669EB - 600mA 1.5MHz Buck Converter Eval Board | MaxLinear
N.º da peça: SP6669EB ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $48.5 | $48,50 |
| 10 | $43.2 | $432,00 |
| 100 | $38.9 | $3.890,00 |
| 500 | $34.5 | $17.250,00 |
| 1.000 | $30.1 | $30.100,00 |
SP6669EB Visão geral
A buck converter (step-down switching regulator) is a switch-mode DC/DC topology that uses an energy-storage inductor to convert a higher DC input voltage into a lower regulated DC output voltage at high efficiency. Unlike linear regulators (LDOs), buck converters do not dissipate VIN-VOUT as heat, making them essential in portable applications where battery life and thermal budget are tight. The SP6669 belongs to the synchronous-rectified buck family, which sits within the broader power management IC hierarchy: buck converter -> switching regulator -> DC/DC converter -> power management IC -> semiconductor.
Key features demonstrated on the SP6669EB include a 0.6V feedback reference voltage that supports low-output rails (such as 1.8V as configured on the eval board), 1.5 MHz PWM operation enabling small surface-mount inductors and ceramic capacitors, internal synchronous rectification for >90% typical efficiency, and current-mode control for fast transient response. The 1.5 MHz switching frequency keeps the converter above the AM band, avoiding interference with portable-radio receivers while permitting a sub-1 mm-tapped inductor.
Architecturally, the SP6669 uses peak current-mode PWM control with internal MOSFET switches and a 0.6V reference. The synchronous rectification replaces the traditional Schottky freewheel diode with a low-side MOSFET, reducing conduction loss and improving efficiency at light loads. The wide 2.5V-6.0V input accommodates single-cell Li-ion (4.2V max), USB (5V), and 2-3 cell alkaline/NiMH stacks without a front-end boost.
Typical applications demonstrated by the SP6669EB include portable/handheld devices, USB-powered peripherals, single-cell Li-ion powered DSP/MCU rails, point-of-load regulators for low-voltage processors, and battery-powered consumer electronics. The fixed 1.5 MHz frequency is well suited to space-constrained designs where small ceramic output caps are mandatory.
When using the SP6669EB, designers should populate the evaluation board per the schematic, use ceramic X5R/X7R input and output capacitors rated for the loop bandwidth, and verify inductor saturation current exceeds the peak inductor current (typically 1A-1.2A for a 600 mA converter). The eval board's 1.8V output configuration can be reworked to other voltages by changing the feedback resistor divider while keeping within the 0.6V minimum reference.
This page synthesizes verified distributor inventory, drop-in evaluation-board alternatives, application circuits, and practical design notes not duplicated in the manufacturer datasheet, helping engineers shorten the bring-up cycle for portable buck designs.
Alternativas drop-in para SP6669EB — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
SP6669EVB
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
SP6669EB-L
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
SP6669EB Classificações máximas e características elétricas
| Manufacturer | MaxLinear, Inc. |
| Product Type | Evaluation Board (DC/DC Step-Down Demo) |
| Silicon | SP6669 (synchronous buck converter) |
| Topologia | Synchronous current-mode PWM step-down (buck) |
| Número de saídas | 1 (non-isolated) |
| Output Voltage (Default) | 1.8 V |
| Output Current (Default) | 600 mA |
| Silicon Output Current Capability | Up to 1 A (per SP6669 datasheet) |
| Faixa de tensão de entrada | 2.5 V to 6.0 V |
| Frequência de comutação | 1.5 MHz (fixed) |
| Feedback Reference Voltage | 0.6 V |
| Retificação síncrona | Internal (no external Schottky required) |
| Control Mode | Current-mode PWM |
| Eval Board Application | Portable power evaluation, low-Voltage POL rails |
| Status RoHS | Compliant (per Radwell listing) |
| Target Applications | Battery-powered portable devices, USB peripherals, single-cell Li-ion systems |
Guia de Configuração de Pinos do SP6669EB standard
Configuração de pinos para SP6669EB (pacote standard). Este dispositivo de potência possui terminais de gate, drain e source. Para pacotes não polarizados, consulte o datasheet do fabricante para a orientação exata do pino 1 e detalhes do footprint. Aplicações comuns incluem projeto de fontes de alimentação, acionamento de motores e comutação de cargas.
Nenhum dado detalhado de pinagem disponível para SP6669EB.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
SP6669EB é adequado para 6 aplicaçãos: Single-Cell Li-Ion Portable Devices, USB-Powered Peripherals, Point-of-Load for Low-Voltage MCUs/SoCs, Battery-Powered Consumer Audio, Industrial Sensor / IoT Nodes, Wearable Health Monitoring.
Single-Cell Li-Ion Portable Devices
The SP6669EB demonstrates a 1.8 V/600 mA rail directly from a single-cell Li-ion battery (2.5 V-4.2 V), making it ideal for handheld electronics, portable medical monitors, and wireless sensor nodes. The integrated synchronous rectification and 1.5 MHz switching frequency keep peak efficiency above 90% at the 300-500 mA typical operating point, extending battery life. Designers can re-target the output by changing two feedback resistors; the wide VIN range avoids the need for a boost stage. The eval board is the reference platform for designers porting the SP6669 into custom Li-ion powered products.
Recomendado
USB-Powered Peripherals
The SP6669EB accepts the USB 5 V rail directly and steps it down to 1.8 V or 3.3 V with up to 600 mA, making it well suited to USB dongles, USB-powered sensors, and HID peripherals. The 2.5 V-6.0 V input range covers USB 2.0/3.0 VBUS and battery backup rails simultaneously. The 1.5 MHz switching frequency avoids AM-band interference for any audio or RF pass-through. Compared to an LDO at 5 V-to-1.8 V/600 mA, the SP6669 reduces power dissipation from 1.9 W to roughly 0.2 W, eliminating the need for a heatsink in a sealed plastic enclosure.
Recomendado
Point-of-Load for Low-Voltage MCUs/SoCs
Modern low-power MCUs and wireless SoCs require 1.0 V-1.8 V core rails at 200-600 mA; the SP6669EB demonstrates exactly that use case with its 1.8 V/600 mA default. The synchronous current-mode control provides fast transient response for digital load steps, and the 0.6 V reference supports sub-1.8 V outputs. The small ceramic-cap / chip-inductor BOM suits dense SoC carrier boards. Designers building wireless IoT nodes, BLE beacons, or low-power MCUs can copy the eval board BOM directly.
Recomendado
Battery-Powered Consumer Audio
The SP6669EB's 1.5 MHz switching frequency (above the AM broadcast band) and synchronous rectification make it suitable for portable audio products such as Bluetooth speakers, headphones, and hearing aids. Low output-ripple at the 1.8 V default keeps noise floor from coupling into the audio codec AVDD rail. The wide VIN range supports Li-ion, alkaline, and NiMH packs with no front-end conversion. The small BOM footprint enables integration inside space-constrained earbud enclosures.
Recomendado
Industrial Sensor / IoT Nodes
The SP6669EB provides a clean 1.8 V or 3.3 V rail for industrial IoT sensor nodes powered from 24 V bus, USB, or battery sources. The 2.5 V-6.0 V input range is sufficient for direct battery connection; designers add a front-end stage for 12 V/24 V. High efficiency (>90%) at 100-500 mA loads keeps the thermal budget tight in sealed IP65 enclosures. The fixed 1.5 MHz frequency simplifies EMI compliance testing for industrial radio modules. The eval board accelerates bring-up of wireless sensor prototypes.
Recomendado
Wearable Health Monitoring
Wearables (fitness bands, smartwatches, medical patches) demand small, high-efficiency rails; the SP6669EB demonstrates a sub-100 mm^2 footprint solution that delivers 600 mA from a Li-ion cell at >90% efficiency. The eval board supports fast transient response to pulse-load sensors (PPG, ECG, accelerometers) by virtue of its current-mode control. Designers can adapt the BOM to 1.2 V rails for low-power SoCs. The synchronous switch removes the Schottky diode - critical for ultra-thin wearable enclosures.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para SP6669EB — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | SP6669EVB | SP6669EB-L |
|---|---|---|---|
| Brand | MaxLinear | MaxLinear | MaxLinear |
| Package | Evaluation Board (SP6669 silicon) | Evaluation Board (SP6669 silicon) - same | Evaluation Board (SP6669 silicon) - same |
| Silicon Output Current | Up to 1 A | Up to 1 A | Up to 1 A |
| Input Voltage Range | 2.5 V to 6.0 V | 2.5 V to 6.0 V | 2.5 V to 6.0 V |
| Switching Frequency | 1.5 MHz (fixed) | 1.5 MHz (fixed) | 1.5 MHz (fixed) |
| Feedback Reference | 0.6 V | 0.6 V | 0.6 V |
| Synchronous Rectification | Internal (no Schottky) | Internal (no Schottky) | Internal (no Schottky) |
| Default Output Voltage | 1.8 V / 600 mA | 1.8 V / 600 mA | 1.8 V / 600 mA |
| Control Topology | Current-mode PWM | Current-mode PWM | Current-mode PWM |
Principais diferenciais
- Integrated synchronous rectification removes external Schottky diode (vs SP6669EB-L)
- 1.5 MHz fixed switching frequency above AM band (vs SP6669EVB)
- Wide 2.5 V-6.0 V input supports single-cell Li-ion, USB, and 2x alkaline (vs SP6669EB-L)
Notas de projeto
Estimated: At VIN=5.0 V, VOUT=1.8 V, IOUT=600 mA, the SP6669EB operates at ~90% efficiency (input power ~3.33 W, output power 1.08 W, dissipation ~0.33 W). On the small eval-board copper pour this is acceptable; in a custom design match the eval board's ground copper and via array under the IC thermal pad to keep junction temperature rise under 30 C above ambient.
Estimated: The SP6669's 1.5 MHz switching frequency requires low-ESR ceramic capacitors (X5R/X7R) rated at least 6.3 V at the input and 6.3 V or 10 V at the output depending on the target rail. Using Y5V or under-rated ceramics can cause output ripple instability under load transients. Always use the inductor specified in the eval BOM or one with the same saturation current (>=1.2 A for a 600 mA continuous converter) and DCR below 100 milliohm.
Estimated: Place the input ceramic capacitor within 2 mm of the SP6669 VIN/GND pins and route the high-di/dt switching loop (VIN - high-side FET - SW - low-side FET - GND) over the smallest possible copper area to minimize radiated EMI. The eval board's two-layer stack-up with a continuous bottom ground pour is sufficient for portable EMI compliance up to ~300 MHz; above that, a four-layer stack with a dedicated ground plane is recommended.
Informações de conformidade
RoHS compliance per Radwell listing (2026-10-11); AEC-Q100 not applicable (consumer/portable eval board); REACH, halogen-free, and conflict-mineral status not stated in available distributor data.
