LTC3114EFE#TRPBF - 40V, 1A Sync Buck-Boost DC/DC | Analog Devices
料号： LTC3114EFE#TRPBF ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $8.61 | $8.61 |
| 10 | $7.92 | $79.20 |
| 100 | $7.24 | $724.00 |
| 500 | $6.55 | $3,275.00 |
| 1,000 | $5.87 | $5,870.00 |
LTC3114EFE#TRPBF 概述
A buck-boost DC/DC converter is a type of switching regulator 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 is achieved by combining buck (step-down) and boost (step-up) topologies in a single converter. The LTC3114-1 uses a proprietary buck-boost PWM control architecture that delivers low noise operation across the entire operating voltage range, with current mode control ensuring exceptional line and load transient responses.
Key features of the LTC3114EFE#TRPBF include a wide 2.2V to 40V input range, programmable average output current up to 1A, and a synchronous rectifier design that eliminates the need for an external Schottky diode, improving efficiency. The device also features a power good indicator, soft-start, and thermal shutdown protection. The output voltage is adjustable via an external resistor divider, and the switching frequency is programmable from 400kHz to 2MHz, allowing optimization between efficiency and component size.
The LTC3114-1 is designed for applications requiring a regulated output from a varying input source, such as battery-powered systems, automotive electronics, and industrial equipment. Its wide input range makes it ideal for 12V and 24V bus systems, while its low noise operation is suitable for noise-sensitive analog and RF circuits. The device is available in a 16-lead TSSOP package with exposed pad for enhanced thermal performance.
When designing with the LTC3114EFE#TRPBF, it is important to select the appropriate external inductor and capacitors based on the desired switching frequency and output ripple requirements. The exposed pad should be soldered to a large copper area for proper heat dissipation. The programmable average output current feature allows the designer to set a current limit, which can be useful for battery charging or LED driving applications.
直接替换替代料： LTC3114EFE#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：
LTC3114EFE-1#TRPBF
✅ 直接替换📋 参考替代料（不在目录中）
LTC3114IFE-1#PBF
✅ 直接替换📋 参考替代料（不在目录中）
LTC3114EFE-1#PBF
✅ 直接替换📋 参考替代料（不在目录中）
LTC3114EFE#TRPBF 最大额定值与电气特性
| 功能 | Buck-Boost |
| 输出类型 | Adjustable |
| 输出电压范围 | 2.7 V to 40 V |
| Output Current | 1 A |
| 输入电压范围 | 2.2 V to 40 V |
| 开关频率 | 400 kHz to 2 MHz |
| 同步整流器 | Yes |
| 输出数量 | 1 |
| 封装 | 16-TSSOP Exposed Pad (HTSSOP) |
| 安装类型 | Surface Mount |
| 工作温度范围 | -40C to +125C |
| RoHS 状态 | Compliant |
| Control Architecture | Current Mode |
| Programmable Average Output Current | Yes |
| Power Good Indicator | Yes |
LTC3114EFE#TRPBF 引脚配置
| 引脚 1 | SW1 — Switch node connection for the buck-boost inductor |
| 引脚 2 | PVIN — Power input supply |
| 引脚 3 | PVIN — Power input supply |
| 引脚 4 | RUN — Enable pin (active high) |
| 引脚 5 | SYNC/MODE — Synchronization and mode selection |
| 引脚 6 | ITH — Error amplifier output for loop compensation |
| 引脚 7 | VFB — Feedback voltage sense |
| 引脚 8 | VOUT — Output voltage sense |
| 引脚 9 | VOUT — Output voltage sense |
| 引脚 10 | PGND — Power ground |
| 引脚 11 | PGND — Power ground |
| 引脚 12 | SW2 — Switch node connection for the buck-boost inductor |
| 引脚 13 | SW2 — Switch node connection for the buck-boost inductor |
| 引脚 14 | PVIN — Power input supply |
| 引脚 15 | PVIN — Power input supply |
| 引脚 16 | PG — Power good indicator |
| 引脚 17 | Exposed Pad — Thermal pad, connect to ground |
典型应用
LTC3114EFE#TRPBF 适用于 6 应用s: Battery-Powered Systems, Automotive Power Supplies, Industrial Power Distribution, Portable Medical Devices, RF and Analog Power Supplies, LED Lighting Drivers.
Battery-Powered Systems
The LTC3114EFE#TRPBF is ideal for battery-powered systems where the input voltage varies as the battery discharges. Its wide 2.2V to 40V input range allows it to maintain a regulated output from a single lithium-ion cell (3.0V to 4.2V) or a multi-cell battery pack. The synchronous rectifier and programmable switching frequency enable high efficiency, extending battery life. For example, in a portable instrument powered by a 2-cell Li-ion battery (5.5V to 8.4V), the converter can provide a stable 5V rail with up to 1A output. The low quiescent current in Burst Mode operation further reduces power consumption during light loads, making it suitable for always-on devices.
推荐
Automotive Power Supplies
In automotive applications, the LTC3114EFE#TRPBF can regulate power from a 12V or 24V battery system, which can experience voltage transients from 6V to 40V during cranking or load dumps. The converter's wide input range and current mode control ensure stable operation under these conditions. The programmable average output current allows the designer to set a current limit for protecting downstream circuitry. The device's operating temperature range of -40C to +125C meets automotive requirements. For example, it can provide a clean 5V rail for an ECU or sensor module, with the exposed pad aiding thermal dissipation in high-temperature environments.
推荐
Industrial Power Distribution
The LTC3114EFE#TRPBF is well-suited for industrial applications where a regulated output is needed from a 24V or 48V bus. Its input range of 2.2V to 40V covers standard industrial supply voltages, and the buck-boost topology allows it to generate a lower or higher output voltage as required. The programmable switching frequency (400kHz to 2MHz) enables designers to optimize for efficiency or component size, which is critical in space-constrained industrial control panels. The device's robust design, including thermal shutdown and current limit, ensures reliable operation in harsh environments. For example, it can power a sensor interface from a 24V rail, providing a stable 3.3V output with up to 1A.
推荐
Portable Medical Devices
The LTC3114EFE#TRPBF is suitable for portable medical devices that require a stable power supply from batteries. Its low noise operation is critical for sensitive analog front-ends in devices like glucose monitors or portable ECG machines. The wide input range accommodates various battery chemistries, and the programmable output current can be used to limit power for safety. The small 16-TSSOP package saves board space, which is essential in handheld devices. The device's high efficiency extends battery life, reducing the frequency of recharging. For example, it can convert a 3.7V Li-ion battery to a 5V rail for a USB-powered medical device, with the power good indicator signaling when the output is stable.
推荐
RF and Analog Power Supplies
The LTC3114EFE#TRPBF's low noise operation makes it ideal for powering RF transceivers, PLLs, and precision analog circuits. The proprietary buck-boost PWM control minimizes output ripple, which is crucial for maintaining signal integrity. The wide input range allows it to operate from a variety of sources, and the programmable switching frequency can be set to avoid interference with sensitive frequency bands. The device's current mode control provides excellent line and load transient responses, ensuring stable operation during dynamic loads. For example, it can power a 3.3V rail for an RF amplifier from a 12V supply, with the output noise kept below 10mV peak-to-peak.
推荐
LED Lighting Drivers
The LTC3114EFE#TRPBF can be used as an LED driver by utilizing its programmable average output current feature. The output current can be set to a constant value, making it suitable for driving high-power LEDs in automotive, industrial, or portable lighting applications. The wide input range allows it to operate from various supply voltages, and the buck-boost topology ensures the LED current remains constant even when the input voltage fluctuates. The device's high efficiency reduces heat generation, which is beneficial in enclosed lighting fixtures. For example, it can drive a 1A LED string from a 12V battery, with the output voltage automatically adjusting to maintain the set current.
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推荐产品汇总
工程参考数据： LTC3114EFE#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 | LTC3114EFE-1#TRPBF | LTC3114IFE-1#PBF | LTC3114EFE-1#PBF | TPS63070RNMT |
|---|---|---|---|---|---|
| Package | 16-TSSOP Exposed Pad | 16-TSSOP Exposed Pad | 16-TSSOP Exposed Pad | 16-TSSOP Exposed Pad | VQFN-20 |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Input Voltage Range | 2.2V to 40V | 2.2V to 40V | 2.2V to 40V | 2.2V to 40V | 2V to 16V |
| Output Voltage Range | 2.7V to 40V | 2.7V to 40V | 2.7V to 40V | 2.7V to 40V | 2.5V to 15V |
| Output Current | 1A | 1A | 1A | 1A | 2A |
| Switching Frequency | 400kHz to 2MHz | 400kHz to 2MHz | 400kHz to 2MHz | 400kHz to 2MHz | 2.4MHz |
| Synchronous Rectifier | Yes | Yes | Yes | Yes | Yes |
| Operating Temperature Range | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C |
关键差异点
- Wide input voltage range (2.2V to 40V) （对比 TPS63070RNMT)
- Programmable average output current （对比 LTC3114EFE-1#TRPBF)
- Synchronous rectification for high efficiency （对比 TPS63070RNMT)
设计说明
For optimal performance, place the input and output capacitors as close as possible to the PVIN and VOUT pins. Use low-ESR ceramic capacitors (e.g., 10uF X5R) for both input and output. The exposed pad should be soldered to a large copper area connected to PGND to enhance thermal dissipation and reduce parasitic inductance.
The LTC3114EFE#TRPBF can dissipate significant power at high input-output differentials and 1A load. For example, at VIN=12V, VOUT=5V, and 1A, the power loss is approximately 7W (assuming 85% efficiency). The 16-TSSOP package has a thermal resistance of about 40C/W (theta_JA) with proper PCB copper. Ensure adequate copper area and airflow to keep the junction temperature below 125C.
Do not exceed the absolute maximum input voltage of 40V. Use a proper input capacitor to handle transients. The RUN pin must be pulled high to enable the device; if left floating, the device may not start. Also, ensure the feedback resistor divider uses 1% tolerance resistors to maintain output voltage accuracy. The ITH pin requires an RC network for loop compensation; refer to the datasheet for recommended values.
合规信息
RoHS compliant per Mouser and LCSC listings. AEC-Q100 qualification not specified for this exact part number; the '-1' version may have automotive grade.
