LTC3370MPUH#TRPBF - 4-Ch 8A Configurable Buck | Analog Devices
MPN： LTC3370MPUH#TRPBF ✓ 啟用中LTC3370MPUH#TRPBF 概覽
A multioutput buck converter is a type of DC-DC switching regulator that integrates multiple step-down channels in a single package, allowing designers to generate several regulated voltage rails from a common input supply. This category sits within the broader hierarchy of power management ICs, which include linear regulators, charge pumps, and other switching converters. The LTC3370's configurable architecture enables it to replace multiple discrete regulators, reducing board space and component count.
Key features include a wide input voltage range of 2.25V to 5.5V, eight 1A power stages that can be combined for higher current, and a programmable switching frequency set by an external resistor. The device also offers independent enable pins for each channel, soft-start, and overcurrent protection. Its 32-lead WFQFN package with exposed pad ensures excellent thermal performance, and the MP suffix indicates a -40°C to 125°C operating junction temperature range, suitable for industrial and automotive environments.
The LTC3370 uses a current-mode, constant-frequency architecture with internal synchronous switches, achieving high efficiency across a wide load range. The configurable power stage assignment allows designers to optimize the number of channels and current capability for their specific application, reducing power loss and improving transient response. The device also includes a low quiescent current mode for light-load efficiency.
Typical applications include point-of-load regulation in FPGA, DSP, and ASIC power supplies, as well as battery-powered portable devices, industrial instrumentation, and automotive infotainment systems. The flexible configuration and high integration make it an excellent choice for multi-rail systems where PCB space is at a premium.
When designing with the LTC3370, ensure proper decoupling on each input supply and place the external frequency-setting resistor close to the RT pin. The exposed pad should be soldered to a large copper area for optimal heat dissipation, especially when operating at high output currents.
直接替換替代品，適用於 LTC3370MPUH#TRPBF — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： LTC3370MPUH#TRPBF （相同外形與佔位） — 差異在於 Package, Maximum Output Current, Operating Temperature Range, Output Voltage Range, Switching Frequency.
LTC3370EUH#TRPBF
✅ 直接替換聯絡詢價
查看資料表 →LTC3370IUH#TRPBF
✅ 直接替換聯絡詢價
查看資料表 →LTC3370EUH#PBF
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →LTC3370IUH#PBF
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →LTC3370MPUH#PBF
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →LTC3370MPUH#TRPBF 最大額定值與電氣特性
| 輸出類型 | Adjustable |
| 輸出數量 | 4 |
| 輸出電壓範圍 | 0.8V to 5V (per channel) |
| 最大輸出電流 | 4A per channel (configurable) |
| 輸入電壓範圍 | 2.25V to 5.5V |
| 切換頻率 | Programmable via external resistor |
| Number of Power Stages | 8 x 1A |
| Configurations | 8 unique output configurations |
| 工作接面溫度 | -40°C to 125°C |
| 封裝 | 32-WFQFN Exposed Pad (UH) |
| 安裝類型 | Surface Mount |
| 同步整流 | Yes |
| RoHS 狀態 | Compliant |
LTC3370MPUH#TRPBF 腳位配置
| 腳位 1 | SW1 — Switch node for channel 1 |
| 腳位 2 | PVIN1 — Power input for channel 1 |
| 腳位 3 | VIN1 — Analog input for channel 1 |
| 腳位 4 | RUN1 — Enable for channel 1 |
| 腳位 5 | C1 — Configuration pin 1 |
| 腳位 6 | C2 — Configuration pin 2 |
| 腳位 7 | C3 — Configuration pin 3 |
| 腳位 8 | RT — Switching frequency set resistor |
| 腳位 9 | GND — Ground |
| 腳位 10 | VOUT1 — Output voltage sense for channel 1 |
| 腳位 11 | FB1 — Feedback for channel 1 |
| 腳位 12 | VOUT2 — Output voltage sense for channel 2 |
| 腳位 13 | FB2 — Feedback for channel 2 |
| 腳位 14 | VOUT3 — Output voltage sense for channel 3 |
| 腳位 15 | FB3 — Feedback for channel 3 |
| 腳位 16 | VOUT4 — Output voltage sense for channel 4 |
| 腳位 17 | FB4 — Feedback for channel 4 |
| 腳位 18 | RUN2 — Enable for channel 2 |
| 腳位 19 | RUN3 — Enable for channel 3 |
| 腳位 20 | RUN4 — Enable for channel 4 |
| 腳位 21 | VIN2 — Analog input for channel 2 |
| 腳位 22 | PVIN2 — Power input for channel 2 |
| 腳位 23 | SW2 — Switch node for channel 2 |
| 腳位 24 | SW3 — Switch node for channel 3 |
| 腳位 25 | PVIN3 — Power input for channel 3 |
| 腳位 26 | VIN3 — Analog input for channel 3 |
| 腳位 27 | SW4 — Switch node for channel 4 |
| 腳位 28 | PVIN4 — Power input for channel 4 |
| 腳位 29 | VIN4 — Analog input for channel 4 |
| 腳位 30 | MODE — Mode selection (light load operation) |
| 腳位 31 | PLLIN — External clock synchronization input |
| 腳位 32 | EXTVCC — External bias supply input |
| 腳位 33 | GND — Exposed pad, ground |
典型應用
LTC3370MPUH#TRPBF 適用於 6 應用s: FPGA and DSP Power Supplies, Battery-Powered Portable Devices, Industrial Instrumentation, Automotive Infotainment, Networking Equipment, Medical Devices.
FPGA and DSP Power Supplies
The LTC3370MPUH#TRPBF provides multiple regulated rails for FPGAs and DSPs, which often require 1.0V, 1.8V, 2.5V, and 3.3V supplies. Its four configurable buck converters can be set to deliver up to 4A per channel, meeting the core and I/O voltage requirements. The wide input range of 2.25V to 5.5V allows direct operation from a 5V or 3.3V bus, and the high efficiency reduces thermal stress in dense designs. The pin-programmable configurations simplify board layout by eliminating external components for voltage selection.
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Battery-Powered Portable Devices
In portable devices, the LTC3370MPUH#TRPBF efficiently converts battery voltage (2.25V to 5.5V) to multiple system rails. Its low no-load supply current extends battery life in standby mode, while the configurable power stages allow optimization for different load profiles. The small 32-WFQFN package saves PCB space, and the synchronous rectification provides high efficiency across the load range. This makes it ideal for smartphones, tablets, and wearables where multiple voltages are needed from a single battery.
推薦
Industrial Instrumentation
Industrial systems often require multiple isolated or non-isolated rails for sensors, ADCs, and microcontrollers. The LTC3370MPUH#TRPBF's -40°C to 125°C temperature range ensures reliable operation in harsh environments. Its configurable outputs can be tailored to specific voltage and current needs, reducing component count and improving reliability. The external resistor-set switching frequency allows synchronization to avoid interference with sensitive analog circuits, making it suitable for precision measurement equipment.
推薦
Automotive Infotainment
Automotive infotainment systems need multiple power rails for processors, displays, and audio amplifiers. The LTC3370MPUH#TRPBF's wide input range handles 5V and 3.3V buses, and its extended temperature range meets automotive requirements. The configurable outputs can supply up to 4A per channel for high-current loads like display backlights. Its high efficiency reduces heat generation in the cabin, and the small package fits space-constrained head units. The device is not AEC-Q100 qualified, so additional qualification may be needed.
推薦
Networking Equipment
Networking devices such as routers and switches require multiple low-voltage rails for ASICs, PHYs, and memory. The LTC3370MPUH#TRPBF provides a compact, efficient solution with four configurable outputs. Its input range of 2.25V to 5.5V allows operation from a 5V supply, and the high output current capability supports power-hungry processors. The programmable switching frequency helps minimize EMI, which is critical in communication equipment. The device's small footprint and high integration reduce BOM cost and board space.
推薦
Medical Devices
Medical devices often require multiple regulated voltages for sensors, processors, and communication modules. The LTC3370MPUH#TRPBF's low noise and high efficiency make it suitable for battery-powered and line-powered equipment. Its configurable outputs can be tailored to specific requirements, and the wide temperature range ensures reliable operation. The small package is ideal for portable monitors and diagnostic tools. The device's synchronous rectification minimizes power loss, extending battery life in portable medical devices.
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推薦產品摘要
工程參考資料，適用於 LTC3370MPUH#TRPBF — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | LTC3370EUH#TRPBF | LTC3370IUH#TRPBF | LTC3370EUH#PBF |
|---|---|---|---|---|
| Package | 32-WFQFN Exposed Pad | 32-WFQFN Exposed Pad | 32-WFQFN Exposed Pad | 32-WFQFN Exposed Pad |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Temperature Range | -40°C to 125°C | 0°C to 85°C | -40°C to 125°C | 0°C to 85°C |
| Output Current per Channel | Up to 4A | Up to 4A | Up to 4A | Up to 4A |
| Input Voltage Range | 2.25V to 5.5V | 2.25V to 5.5V | 2.25V to 5.5V | 2.25V to 5.5V |
| Number of Outputs | 4 | 4 | 4 | 4 |
| Switching Frequency | Programmable | Programmable | Programmable | Programmable |
| Packaging | Tape & Reel | Tape & Reel | Tape & Reel | Tray |
主要差異化特點
- Extended temperature range (-40°C to 125°C) (對比LTC3370EUH#TRPBF)
- Configurable power stages (8 x 1A) (對比LTC3370EUH#TRPBF)
- Pin-programmable configurations (對比LTC3370EUH#TRPBF)
設計說明
Place input and output capacitors close to the respective PVIN and SW pins to minimize parasitic inductance. Use low-ESR ceramic capacitors (e.g., 10uF) for each channel. The exposed pad (GND) must be soldered to a large copper area for thermal management and electrical grounding. Ensure adequate via stitching to the ground plane.
The LTC3370MPUH#TRPBF can dissipate significant power at high output currents. The 32-WFQFN package has an exposed pad that must be connected to a thermal relief pattern. For 4A per channel, calculate power dissipation as (VIN - VOUT) * IOUT * (1 - efficiency). Use a 2-layer or 4-layer PCB with thermal vias to keep junction temperature below 125°C.
Do not exceed the absolute maximum input voltage of 5.5V. Ensure the RT pin resistor is placed close to the pin and connected to ground. The C1-C3 pins must be tied to VIN or GND to select the desired configuration; floating these pins can cause undefined behavior. Also, verify that the total output current does not exceed 8A across all channels.
合規資訊
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified. Lead-free per datasheet.
