LTC3112IDE#TRPBF - 15V, 2.5A Sync Buck-Boost | Analog Devices
料号： LTC3112IDE#TRPBF ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $6.5 | $6.50 |
| 10 | $5.85 | $58.50 |
| 100 | $4.95 | $495.00 |
| 500 | $4.2 | $2,100.00 |
| 1,000 | $3.75 | $3,750.00 |
LTC3112IDE#TRPBF 概述
A buck-boost converter is a type of DC-DC switching regulator that can produce an output voltage either higher or lower than the input voltage. It is essential in battery-powered systems where the battery voltage may drop below the required rail, or in applications needing a regulated output from a varying input source. The LTC3112 belongs to the family of synchronous converters, which use active switches instead of diodes for higher efficiency, and it is part of the broader power management IC category.
Key features include a 2.5A continuous output current, an input voltage range of 2.5V to 15V, and an adjustable output voltage from 2.5V to 15V. The switching frequency is fixed at 1.2MHz, allowing small external components. The device offers high efficiency up to 95%, low quiescent current, and a shutdown mode that reduces supply current to under 1µA. It also includes soft-start, current limiting, and thermal shutdown protection.
Technically, the LTC3112 uses a 4-switch architecture with a single inductor, which minimizes noise and component count compared to traditional two-stage solutions. The synchronous rectification improves efficiency, especially at lower output voltages. The device operates in PWM mode at heavy loads and automatically transitions to Burst Mode® operation at light loads to maintain high efficiency across the load range.
Typical applications include portable electronics, industrial instrumentation, automotive systems, and battery-powered devices where a regulated output is needed from a varying input source. The wide input range and high output current make it suitable for powering FPGAs, microcontrollers, sensors, and communication modules.
When designing with the LTC3112, ensure proper PCB layout with short, wide traces for high-current paths and adequate thermal vias to the exposed pad. The inductor and capacitors should be placed close to the IC to minimize parasitic inductance and noise.
直接替换替代料： LTC3112IDE#TRPBF ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
LTC3112EDE#TRPBF
✅ 直接替换📋 参考替代料（不在目录中）
LTC3112MPDE#TRPBF
✅ 直接替换📋 参考替代料（不在目录中）
LTC3112IDHD#TRPBF
⚡ 相同封装📋 参考替代料（不在目录中）
LTC3112IDE#TRPBF 最大额定值与电气特性
| 功能 | Step-Up/Step-Down (Buck-Boost) |
| 输出配置 | Positive, Adjustable |
| 拓扑 | Buck-Boost |
| 输出类型 | Adjustable |
| 输出数量 | 1 |
| Voltage - Input (Min) | 2.5 V |
| Voltage - Input (Max) | 15 V |
| Voltage - Output (Min/Fixed) | 2.5 V |
| Voltage - Output (Max) | 15 V |
| Current - Output | 2.5 A |
| Frequency - Switching | 1.2 MHz |
| 同步整流器 | Yes |
| 工作温度 | -40°C ~ 125°C (TJ) |
| 封装 / 外壳 | 16-WFDFN Exposed Pad |
| Supplier Device Package | 16-DFN (4x3) |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant |
LTC3112IDE#TRPBF 引脚配置
| 引脚 1 | SW1 — Switch node connection to inductor |
| 引脚 2 | PVIN — Power input supply |
| 引脚 3 | PVIN — Power input supply |
| 引脚 4 | GND — Ground |
| 引脚 5 | GND — Ground |
| 引脚 6 | SW2 — Switch node connection to inductor |
| 引脚 7 | PVOUT — Power output |
| 引脚 8 | PVOUT — Power output |
| 引脚 9 | VOUT — Output voltage sense |
| 引脚 10 | VFB — Feedback voltage |
| 引脚 11 | RUN — Enable input |
| 引脚 12 | SYNC/MODE — Synchronization and mode selection |
| 引脚 13 | VIN — Input supply for control circuitry |
| 引脚 14 | SS — Soft-start programming |
| 引脚 15 | GND — Ground |
| 引脚 16 | GND — Ground |
| 引脚 17 | Exposed Pad — Thermal pad, connect to ground |
典型应用
LTC3112IDE#TRPBF 适用于 6 应用s: Battery-Powered Portable Devices, Industrial Power Supplies, Automotive Electronics, FPGA and Processor Power, IoT and Smart Home Devices, Test and Measurement Equipment.
Battery-Powered Portable Devices
The LTC3112IDE#TRPBF is ideal for battery-powered devices such as smartphones, tablets, and portable instruments. Its wide input range (2.5V to 15V) allows it to maintain a regulated output as the battery discharges, and its high efficiency (up to 95%) extends battery life. The 2.5A output current can power application processors, displays, and wireless modules. The low quiescent current in Burst Mode operation (40µA) is crucial for standby power consumption, and the small 16-lead DFN package saves board space in compact designs.
推荐
Industrial Power Supplies
In industrial applications, the LTC3112IDE#TRPBF provides a regulated output from unregulated or varying input sources, such as 12V or 24V rails. Its input range of 2.5V to 15V covers common industrial voltages, and the 2.5A output can drive sensors, actuators, and control logic. The device's robust operating temperature range (-40°C to 125°C) and thermal shutdown protection ensure reliable operation in harsh environments. The fixed 1.2MHz switching frequency allows for a compact, low-EMI design with small external components.
推荐
Automotive Electronics
The LTC3112IDE#TRPBF is suitable for automotive electronics such as infotainment systems, ADAS, and body control modules. It handles the wide input voltage variations typical in automotive environments (e.g., cold crank at 4V, load dump at 40V) within its 2.5V to 15V range. The high efficiency reduces heat dissipation in enclosed spaces, and the AEC-Q100 qualification ensures reliability. The 2.5A output can power microcontrollers, sensors, and communication interfaces. The device's low quiescent current is beneficial for always-on systems.
推荐
FPGA and Processor Power
The LTC3112IDE#TRPBF can power FPGAs, DSPs, and application processors that require a stable core voltage from a varying input source. Its 2.5A output current is sufficient for many mid-range FPGAs, and the adjustable output (2.5V to 15V) allows flexibility. The low output ripple and high PSRR ensure clean power for sensitive digital circuits. The synchronous rectification and Burst Mode operation maintain high efficiency across the load range, reducing thermal stress. The small package is ideal for space-constrained designs.
推荐
IoT and Smart Home Devices
For IoT devices and smart home sensors, the LTC3112IDE#TRPBF provides efficient power conversion from batteries or energy harvesting sources. Its wide input range accommodates various battery chemistries (e.g., Li-ion, alkaline) and solar cells. The low quiescent current (40µA) is critical for battery-powered wireless sensors that spend most of their time in sleep mode. The 2.5A output can support intermittent high-current bursts from radios or actuators. The compact DFN package fits into small form factors.
推荐
Test and Measurement Equipment
In test and measurement equipment, the LTC3112IDE#TRPBF provides a stable, low-noise power supply for analog and digital circuits. Its high efficiency reduces heat in benchtop instruments, and the wide input range allows operation from various power sources. The 2.5A output can power multiple rails, and the adjustable output enables precise voltage setting. The device's low output ripple and high PSRR are essential for accurate measurements. The fixed 1.2MHz switching frequency minimizes interference with sensitive measurement circuits.
推荐
推荐产品汇总
工程参考数据： LTC3112IDE#TRPBF ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | LTC3112EDE#TRPBF | LTC3112MPDE#TRPBF | LTC3112IDHD#TRPBF | TPS63070RNMT | LTC3113IFE#PBF |
|---|---|---|---|---|---|---|
| Package | 16-WFDFN (4x3mm) | 16-WFDFN (4x3mm) | 16-WFDFN (4x3mm) | 16-WFDFN (5x4mm) | VQFN-15 | 20-TSSOP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments | Analog Devices |
| Input Voltage Range | 2.5V to 15V | 2.5V to 15V | 2.5V to 15V | 2.5V to 15V | 2V to 16V | 2.5V to 15V |
| Output Current | 2.5A | 2.5A | 2.5A | 2.5A | 2A | 3A |
| Switching Frequency | 1.2MHz | 1.2MHz | 1.2MHz | 1.2MHz | 2.4MHz | 1.2MHz |
| Operating Temperature Range | -40°C to 125°C | -40°C to 125°C | -55°C to 150°C | -40°C to 125°C | -40°C to 125°C | -40°C to 125°C |
| Efficiency (Peak) | 95% | 95% | 95% | 95% | 95% | 95% |
| Quiescent Current | 40µA (Burst Mode) | 40µA | 40µA | 40µA | 15µA | 40µA |
关键差异点
- True buck-boost operation with seamless transition （对比 TPS63070RNMT)
- Higher output current (2.5A vs 2A) （对比 TPS63070RNMT)
- Same-package drop-in alternatives available （对比 LTC3112IDHD#TRPBF)
设计说明
For optimal performance, place the input and output capacitors as close as possible to the PVIN and PVOUT pins. Use low-ESR ceramic capacitors (e.g., 10µF X5R) and a 1µF capacitor on the VIN pin. The inductor should be placed near the SW pins with short, wide traces to minimize parasitic inductance and resistance. Ensure a solid ground plane and connect the exposed pad to the ground plane with multiple vias for thermal management.
The LTC3112IDE#TRPBF can dissipate significant power at high output currents and large input-output voltage differentials. The 16-lead DFN package has a thermal resistance of approximately 40°C/W (theta_JA) with proper PCB layout. For continuous operation at 2.5A, ensure adequate copper area and thermal vias to keep the junction temperature below 125°C. In high-ambient-temperature environments, consider derating the output current or adding airflow.
Do not exceed the absolute maximum ratings of 16V on PVIN or VIN. Ensure the RUN pin is not left floating; tie it to VIN or use a logic signal to enable the device. The SS pin should have a capacitor (e.g., 0.1µF) to set soft-start time and prevent inrush current. Avoid using inductors with saturation current below the peak switch current limit (typically 3A). Also, verify the feedback resistor divider uses 1% tolerance resistors to maintain output voltage accuracy.
合规信息
RoHS compliant per Analog Devices product page. AEC-Q100 qualified for automotive applications. Lead-free finish.
