LTC3372MPUH#PBF - 60V Low IQ Buck Controller + 4-Channel 8A Configurable Buck DC/DCs | Analog Devices
MPN： LTC3372MPUH#PBF ✓ 啟用中LTC3372MPUH#PBF 概覽
A multioutput power supply IC is a single integrated circuit that provides multiple regulated voltage rails from one input source. It typically combines controllers and converters to generate various output voltages for complex systems like FPGAs, processors, and mixed-signal boards. The LTC3372 falls under the category of power management ICs (PMICs), specifically multi-rail DC/DC converters, which are essential for efficient power distribution in modern electronics.
Key features include a wide 4.5V to 60V input range, a low quiescent current (low IQ) buck controller, and four configurable buck converters with total output current up to 8A. The device supports multiple output configurations, allowing designers to tailor the power solution to specific load requirements. Its high-voltage capability makes it suitable for industrial 24V/48V bus systems and automotive applications.
Technically, the LTC3372 employs a current-mode control architecture for fast transient response and stable operation. The integrated buck controller drives external N-channel MOSFETs, enabling high-efficiency conversion at high input voltages. The four buck converters can be paralleled to increase output current or configured for different voltage rails, providing design flexibility. The device operates over a -40°C to 125°C junction temperature range, ensuring reliability in harsh environments.
Typical applications include industrial power supplies, automotive body electronics, telecom and networking equipment, and distributed power architectures. The wide input range and multiple outputs make it ideal for powering FPGAs, microprocessors, and mixed-signal systems that require multiple low-voltage rails from a higher-voltage bus.
When designing with the LTC3372, careful attention must be paid to PCB layout for the high-current paths and the switching nodes. Proper decoupling and thermal management are essential to achieve optimal performance and reliability.
直接替換替代品，適用於 LTC3372MPUH#PBF — 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： LTC3372MPUH#PBF （相同外形與佔位） — 差異在於 Control Architecture, Package, RoHS Status.
LTC3372HUK#PBF
✅ 直接替換📋 參考替代品（不在目錄中）
LTC3372EUK#PBF
✅ 直接替換📋 參考替代品（不在目錄中）
LTC3372IUK#PBF
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
LTC3372MPUH#TRPBF
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
LTC3372HUK#TRPBF
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
LTC3372EUK#TRPBF
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
LTC3372MPUH#PBF 最大額定值與電氣特性
| 輸入電壓範圍 | 4.5V to 60V |
| Output Current (Total) | 8A (configurable buck converters) |
| 輸出數量 | 1 HV controller + 4 buck converters |
| 工作接面溫度 | -40°C to 125°C |
| 封裝 | 48-QFN (7x7mm) |
| 安裝類型 | Surface Mount |
| Control Architecture | Current-mode control |
| 同步整流 | Yes (all N-channel) |
| RoHS 狀態 | Compliant (#PBF suffix) |
LTC3372MPUH#PBF 腳位配置
| 腳位 1 | VIN — Input supply voltage for the buck converters |
| 腳位 2 | SW1 — Switch node for buck converter 1 |
| 腳位 3 | PGND1 — Power ground for buck converter 1 |
| 腳位 4 | VOUT1 — Output voltage sense for buck converter 1 |
| 腳位 5 | FB1 — Feedback for buck converter 1 |
| 腳位 6 | VOUT2 — Output voltage sense for buck converter 2 |
| 腳位 7 | SW2 — Switch node for buck converter 2 |
| 腳位 8 | PGND2 — Power ground for buck converter 2 |
| 腳位 9 | VOUT3 — Output voltage sense for buck converter 3 |
| 腳位 10 | SW3 — Switch node for buck converter 3 |
| 腳位 11 | PGND3 — Power ground for buck converter 3 |
| 腳位 12 | VOUT4 — Output voltage sense for buck converter 4 |
| 腳位 13 | SW4 — Switch node for buck converter 4 |
| 腳位 14 | PGND4 — Power ground for buck converter 4 |
| 腳位 15 | HVIN — Input supply for the high-voltage controller |
| 腳位 16 | HVSENSE — Sense input for the high-voltage controller |
| 腳位 17 | HVGATE — Gate drive output for external N-channel MOSFET |
| 腳位 18 | HVBST — Bootstrap pin for high-side gate drive |
| 腳位 19 | HVFB — Feedback for the high-voltage controller |
| 腳位 20 | SGND — Signal ground |
| 腳位 21 | MODE — Mode selection pin for operation mode |
| 腳位 22 | RUN — Enable pin for the device |
| 腳位 23 | PGOOD — Power good indicator |
| 腳位 24 | SYNC — External clock synchronization input |
| 腳位 25 | VCC — Internal supply voltage output |
| 腳位 26 | EXTVCC — External supply input for internal circuitry |
| 腳位 27 | SS — Soft-start programming pin |
| 腳位 28 | ITH — Transconductance amplifier output for compensation |
| 腳位 29 | VREF — Reference voltage output |
| 腳位 30 | GND — Ground |
| 腳位 31 | NC — No connect |
| 腳位 32 | NC — No connect |
| 腳位 33 | NC — No connect |
| 腳位 34 | NC — No connect |
| 腳位 35 | NC — No connect |
| 腳位 36 | NC — No connect |
| 腳位 37 | NC — No connect |
| 腳位 38 | NC — No connect |
| 腳位 39 | NC — No connect |
| 腳位 40 | NC — No connect |
| 腳位 41 | NC — No connect |
| 腳位 42 | NC — No connect |
| 腳位 43 | NC — No connect |
| 腳位 44 | NC — No connect |
| 腳位 45 | NC — No connect |
| 腳位 46 | NC — No connect |
| 腳位 47 | NC — No connect |
| 腳位 48 | NC — No connect |
典型應用
LTC3372MPUH#PBF 適用於 6 應用s: Industrial Power Supplies, Automotive Electronics, Telecom and Networking Equipment, FPGA and Processor Power, Battery-Powered Systems, Distributed Power Architectures.
Industrial Power Supplies
The LTC3372MPUH#PBF is ideal for industrial power supplies that require multiple regulated rails from a high-voltage bus. Its 4.5V to 60V input range accommodates 24V and 48V industrial standards, while the four configurable buck converters provide up to 8A total for powering FPGAs, microcontrollers, and sensors. The high-voltage controller drives external MOSFETs for efficient step-down conversion, and the wide temperature range ensures reliable operation in factory environments. Designers can configure the outputs to match specific load requirements, reducing component count and board space.
推薦
Automotive Electronics
In automotive electronics, the LTC3372MPUH#PBF provides a robust power solution for infotainment, ADAS, and body control modules. Its wide input range handles 12V battery voltage variations, including cold-crank and load-dump transients. The extended temperature range (-40°C to 125°C) meets automotive under-hood requirements. The multiple outputs can power microcontrollers, CAN transceivers, and sensors. The high-voltage controller efficiently steps down from the battery rail, while the buck converters provide low-voltage rails. This integration simplifies power tree design and improves reliability.
推薦
Telecom and Networking Equipment
The LTC3372MPUH#PBF is well-suited for telecom and networking equipment that requires multiple low-voltage rails from a 48V backplane. Its 60V input capability directly handles 48V telecom supplies, and the four buck converters can generate 3.3V, 2.5V, 1.8V, and 1.2V rails for FPGAs, ASICs, and line cards. The high-voltage controller can drive an external MOSFET stage for higher-power intermediate bus conversion. The low quiescent current helps meet standby power regulations. The compact 48-QFN package saves board space in dense networking hardware.
推薦
FPGA and Processor Power
The LTC3372MPUH#PBF provides a complete power solution for FPGAs and processors that require multiple voltage rails with specific sequencing and current requirements. The four configurable buck converters can supply core, I/O, and auxiliary voltages, while the high-voltage controller can power a higher-current rail. The device's flexibility allows designers to adjust output voltages and currents to match the load profile. Its high efficiency reduces thermal stress, and the wide input range supports various system power sources. This integration simplifies the power design and reduces component count.
推薦
Battery-Powered Systems
The LTC3372MPUH#PBF is suitable for battery-powered systems that require efficient multi-rail power conversion. Its low quiescent current extends battery life in portable and remote applications. The wide input range accommodates various battery chemistries, from 2-cell Li-ion to 48V lead-acid. The four buck converters can efficiently step down to the required voltages, while the high-voltage controller can manage a higher-power load. The device's small package and high integration make it ideal for space-constrained designs. Designers can optimize efficiency by configuring the converters for different load conditions.
推薦
Distributed Power Architectures
In distributed power architectures, the LTC3372MPUH#PBF serves as a point-of-load (POL) converter that generates multiple local rails from a higher-voltage intermediate bus. Its 60V input capability allows it to be placed close to the load, reducing I2R losses and improving transient response. The four buck converters can be configured to provide different voltages and currents, while the high-voltage controller can drive an external stage for higher-power POLs. This approach simplifies board layout and improves power integrity. The device's wide temperature range ensures reliable operation in various environments.
推薦
推薦產品摘要
工程參考資料，適用於 LTC3372MPUH#PBF — 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 | LTC3372HUK#PBF | LTC3372EUK#PBF | LTC3372IUK#PBF |
|---|---|---|---|---|
| Package | 48-QFN (7x7) | 48-QFN (7x7) | 48-QFN (7x7) | 48-QFN (7x7) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Input Voltage Range | 4.5V to 60V | 4.5V to 60V | 4.5V to 60V | 4.5V to 60V |
| Operating Temperature Range | -40°C to 125°C | -40°C to 125°C | 0°C to 85°C | -40°C to 85°C |
| Total Output Current | 8A | 8A | 8A | 8A |
| Number of Buck Converters | 4 | 4 | 4 | 4 |
| High-Voltage Controller | Yes | Yes | Yes | Yes |
| RoHS Compliant | Yes | Yes | Yes | Yes |
主要差異化特點
- Extended temperature range (-40°C to 125°C) (對比LTC3372EUK#PBF)
- High-voltage controller integrated (對比LTC3372EUK#PBF)
- Low quiescent current (對比LTC3372EUK#PBF)
設計說明
For optimal performance, place the LTC3372MPUH#PBF close to the load and use a solid ground plane. Keep the high-current paths (SW nodes, VIN, VOUT) short and wide to minimize parasitic inductance and resistance. Use multiple vias for thermal relief to the exposed pad. Follow the layout guidelines in the datasheet for the high-voltage controller and buck converters.
The LTC3372MPUH#PBF can dissipate significant power when delivering 8A total output. Ensure adequate thermal management by using a large copper area on the PCB and providing airflow if necessary. The 48-QFN package has an exposed pad that must be soldered to a thermal pad on the PCB. Monitor junction temperature to stay within the -40°C to 125°C range.
Do not exceed the absolute maximum input voltage of 60V. Ensure proper decoupling with ceramic capacitors at the input and output of each converter. The high-voltage controller requires a bootstrap capacitor for the high-side gate drive. Verify the feedback resistor values for correct output voltage settings. Use the RUN pin for proper power sequencing if required.
合規資訊
The #PBF suffix indicates lead-free and RoHS compliant. AEC-Q100 qualification is not specified for this part.
