LTC3115-2EFE#PBF - 40V, 2A Sync Buck-Boost DC/DC | Analog Devices
N.º da peça: LTC3115-2EFE#PBF ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $9.99 | $9,99 |
| 10 | $8.95 | $89,50 |
| 100 | $7.85 | $785,00 |
| 500 | $6.95 | $3.475,00 |
| 1.000 | $6.25 | $6.250,00 |
LTC3115-2EFE#PBF Visão geral
A buck-boost converter is a type of DC-DC converter that can step up or step down an input voltage to produce a regulated output voltage, regardless of whether the input is higher or lower than the output. This makes it ideal for battery-powered systems where the battery voltage can vary above and below the desired rail. The LTC3115-2 belongs to the family of switching regulators, which are power management ICs that use inductive energy storage to achieve high efficiency, often exceeding 90%.
Key features of the LTC3115-2 include a 2A output current capability, a wide 2.7V to 40V input and output range, and a switching frequency programmable from 400kHz to 2MHz. It also features Burst Mode operation for high efficiency at light loads, a 3µA shutdown current, output disconnect in shutdown, short-circuit protection, and internal soft-start. The device is designed to handle fast input voltage transients, making it suitable for automotive and industrial applications where supply voltage can fluctuate rapidly.
The LTC3115-2 uses a current-mode control architecture with a 4-switch synchronous rectifier topology, which minimizes conduction losses and improves efficiency across a wide load range. The device integrates the power switches, reducing external component count and simplifying PCB layout. Its programmable switching frequency allows designers to optimize efficiency versus component size, and the SYNC pin enables synchronization to an external clock for noise-sensitive applications.
Typical applications include automotive power supplies, industrial instrumentation, portable devices, and battery-powered systems where a stable output voltage is required from a varying input source. The LTC3115-2 is particularly well-suited for systems that experience fast input voltage transients, such as those in automotive load-dump conditions or industrial power rails.
When designing with the LTC3115-2, it is important to select the inductor and output capacitors according to the datasheet guidelines to ensure stability and optimal transient response. The exposed pad should be soldered to a large copper area for effective heat dissipation, especially at high output currents.
Alternativas drop-in para LTC3115-2EFE#PBF — 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:
LTC3115EFE-1#PBF
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
LTC3115EFE-2#PBF
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
LTC3115EFE-1#PBF
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
LTC3115EFE-2#PBF
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
LTC3115EFE-1#PBF
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
LTC3115-2EFE#PBF Classificações máximas e características elétricas
| Função | Buck-Boost |
| Tensão de saída | 2.7V to 40V (Adjustable) |
| Output Current | 2A (Max) |
| Faixa de tensão de entrada | 2.7V to 40V |
| Frequência de comutação | 400kHz to 2MHz (Programmable) |
| Retificador síncrono | Yes |
| Burst Mode Operation | Yes |
| Corrente de desligamento | 3µA |
| Output Disconnect in Shutdown | Yes |
| Short-Circuit Protection | Yes |
| Internal Soft-Start | Yes |
| Encapsulamento | 20-Lead TSSOP (FE16) with Exposed Pad |
| Faixa de temperatura de operação | -40°C to +125°C |
| RoHS Compliant | Yes |
| Tipo de montagem | Surface Mount |
Configuração de pinos do LTC3115-2EFE#PBF
| Pino 1 | SW1 — Switch node connection for the buck-boost converter |
| Pino 2 | PVIN1 — Power input supply |
| Pino 3 | PVIN2 — Power input supply |
| Pino 4 | VIN — Input supply for internal circuitry |
| Pino 5 | RUN — Enable pin (active high) |
| Pino 6 | SYNC — External clock synchronization input |
| Pino 7 | MODE — Mode selection (Burst Mode or PWM) |
| Pino 8 | ITH — Error amplifier output for loop compensation |
| Pino 9 | FB — Feedback input for output voltage regulation |
| Pino 10 | VOUT — Output voltage sense |
| Pino 11 | PVOUT1 — Power output |
| Pino 12 | PVOUT2 — Power output |
| Pino 13 | SW2 — Switch node connection for the buck-boost converter |
| Pino 14 | PGND — Power ground |
| Pino 15 | PGND — Power ground |
| Pino 16 | SGND — Signal ground |
| Pino 17 | SS — Soft-start programming pin |
| Pino 18 | FREQ — Switching frequency programming pin |
| Pino 19 | VCC — Internal regulated supply output |
| Pino 20 | EXPOSED PAD — Exposed pad for thermal dissipation, connect to ground |
Aplicações típicas
LTC3115-2EFE#PBF é adequado para 6 aplicaçãos: Automotive Power Supplies, Industrial Instrumentation, Portable Devices, Battery-Powered Systems, Telecom and Networking, Medical Devices.
Automotive Power Supplies
The LTC3115-2EFE#PBF is ideal for automotive power supplies due to its wide 2.7V to 40V input range and ability to handle fast input voltage transients, such as load-dump conditions. It provides a regulated output voltage for various automotive systems, including infotainment, ADAS, and body control modules. Its high efficiency and robust protection features ensure reliable operation in harsh automotive environments.
Recomendado
Industrial Instrumentation
In industrial instrumentation, the LTC3115-2EFE#PBF provides a stable output voltage from a varying input source, such as a 24V industrial bus. Its wide input range and programmable switching frequency allow designers to optimize efficiency and component size. The device's fast transient response ensures stable operation in systems with rapidly changing loads, making it suitable for sensors, actuators, and control systems.
Recomendado
Portable Devices
The LTC3115-2EFE#PBF is well-suited for portable devices that require a regulated output voltage from a battery that can vary above and below the desired rail. Its Burst Mode operation and low shutdown current (3µA) help extend battery life. The device's small 20-lead TSSOP package and high efficiency make it ideal for space-constrained applications such as handheld instruments and portable medical devices.
Recomendado
Battery-Powered Systems
For battery-powered systems, the LTC3115-2EFE#PBF provides a regulated output voltage from a battery whose voltage can drop below the required level. Its wide input range and high efficiency ensure maximum battery life. The device's low shutdown current and Burst Mode operation are particularly beneficial for standby and light-load conditions, making it ideal for IoT devices, remote sensors, and wireless modules.
Recomendado
Telecom and Networking
In telecom and networking equipment, the LTC3115-2EFE#PBF provides a stable output voltage from a wide input range, such as 12V or 24V backplane supplies. Its programmable switching frequency allows synchronization to external clocks to minimize noise interference. The device's high efficiency and thermal performance make it suitable for continuous operation in rack-mounted systems.
Recomendado
Medical Devices
The LTC3115-2EFE#PBF is suitable for medical devices that require a reliable and regulated power supply from a battery or DC source. Its wide input range and high efficiency ensure consistent performance, while its low shutdown current helps preserve battery life in portable medical equipment. The device's robust protection features, including short-circuit protection and thermal shutdown, enhance safety in critical applications.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para LTC3115-2EFE#PBF — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | LTC3115EFE-1#PBF |
|---|---|---|
| Package | 20-Lead TSSOP (FE16) | 20-Lead TSSOP (FE16) |
| Brand | Analog Devices | Analog Devices |
| Input Voltage Range | 2.7V to 40V | 2.7V to 40V |
| Output Current | 2A | 2A |
| Switching Frequency | 400kHz to 2MHz | 400kHz to 2MHz |
| Burst Mode | Yes | Yes |
| Shutdown Current | 3µA | 3µA |
| Optimized for Fast Transients | Yes | No |
Principais diferenciais
- Optimized for fast input voltage transients (vs LTC3115EFE-1#PBF)
- Wide input and output voltage range (vs LTC3115EFE-1#PBF)
- High efficiency with Burst Mode (vs LTC3115EFE-1#PBF)
Notas de projeto
For optimal thermal performance, solder the exposed pad of the 20-lead TSSOP package to a large copper area on the PCB. Use multiple vias to connect the pad to the ground plane, which helps dissipate heat and reduce thermal resistance. Ensure adequate copper pour for high current paths, especially for the input and output power connections.
Keep the switching node (SW1, SW2) traces short and wide to minimize parasitic inductance and EMI. Place the input and output capacitors as close as possible to the IC pins. Use a ground plane to provide a low-impedance return path for high-frequency currents. Separate the power ground (PGND) from the signal ground (SGND) to avoid noise coupling.
Do not exceed the absolute maximum ratings for input voltage (40V) and output voltage (40V). Ensure the inductor is rated for the peak current and saturation current. Use appropriate compensation components on the ITH pin to ensure loop stability. Verify the soft-start capacitor value to control inrush current during startup.
Informações de conformidade
RoHS compliant per Analog Devices product page. AEC-Q100 qualification not specified for this part.
