LTC3576EUFE-1#TRPBF - PMIC, USB OTG + 3x Buck | Analog Devices
Артикул: LTC3576EUFE-1#TRPBF ✓ Активен| Кол-во | Цена за ед. | Итого |
|---|---|---|
| 1 | $9.85 | $9,85 |
| 10 | $9.1 | $91,00 |
| 100 | $8.05 | $805,00 |
| 500 | $7.2 | $3.600,00 |
| 1.000 | $6.55 | $6.550,00 |
LTC3576EUFE-1#TRPBF Обзор
What is a PowerPath PMIC? A PowerPath power management IC is a category of battery management device that intelligently arbitrates between multiple power sources (wall adapter, USB, battery) while simultaneously delivering regulated rails to the system load. PMICs sit in the power management hierarchy above discrete battery chargers and DC/DC converters, integrating switching charger, ideal diode, OTG boost, and multiple buck regulators into a single die for handheld and portable designs.
Key features include automatic load prioritization between VBUS (USB), WALL, and BAT pins, an ideal diode controller for low-loss power path switching, integrated battery charging with programmable float voltage, USB OTG boost mode for powering external devices, and I2C programmability for all major parameters on the -1 variant. The high level of integration reduces external BOM count by more than 30 discrete components.
Technically, the LTC3576EUFE-1 uses a bidirectional switching architecture with synchronous rectification to maintain efficiency above 90% across the typical discharge curve. The triple buck converters operate at constant frequency with internal MOSFETs, while the ideal diode minimizes forward drop and reverse leakage during source transitions.
Typical applications include handheld medical devices, portable instruments, USB-powered embedded systems, point-of-sale terminals, and mobile industrial terminals where multi-source power arbitration is required.
When designing with this part, ensure VBUS and WALL input capacitors use low-ESR ceramics rated for the maximum transient voltage. The exposed pad must be soldered to a sufficiently large copper pour for thermal dissipation, since the package dissipates up to ~2 W under full-load charging.
This page synthesizes distributor pricing, drop-in alternatives, application circuits, and practical design notes not found in the manufacturer datasheet, enabling a faster and more reliable design-in decision.
Аналоги без доработки для LTC3576EUFE-1#TRPBF — тот же корпус, pin-to-pin совместимость. Компоненты в других корпусах, требующие переработки PCB, исключены.
Варианты в этой серии
Модели той же серии, совместимые без доработки с LTC3576EUFE-1#TRPBF (тот же форм-фактор и посадочное место) — отличается по Operating Temperature, Package, RoHS Status, Topology, Overvoltage Protection.
Инструмент быстрого сравнения — выберите альтернативные компоненты для сравнения бок о бок:
LTC3576EUFE#TRPBF
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
LTC3576EUFE-1#PBF
✅ Прямая замена ⚠️ Характеристики не проверены✓ В наличии
$4.6 / шт.
Открыть даташит →LTC3576EUFE#PBF
✅ Прямая замена ⚠️ Характеристики не проверены📋 Справочный аналог (нет в каталоге)
LTC3576EUFE-1#TRPBF Характеристики
| Product Type | PMIC - Switching Power Manager with USB OTG |
| Input Voltage Range (VBUS/WALL) | 4.35 V to 5.5 V |
| Battery Type Supported | Li-Ion / Li-Polymer |
| DC/DC Output 1 | 1.9 V to 3.6 V @ 400 mA |
| DC/DC Output 2 | 1.8 V to 3.4 V @ 400 mA |
| DC/DC Output 3 | 1.0 V to 1.8 V @ 1 A |
| Топология | Bidirectional switching PowerPath + 3x synchronous buck |
| USB On-the-Go Support | Yes (boost mode) |
| Ideal Diode Controller | Integrated (low-loss power path) |
| Overvoltage Protection | Yes (VBUS/WALL OVP) |
| I2C Interface | Yes (LTC3576-1 variant) |
| Рабочая температура | -40C to +85C |
| Корпус | 38-pin QFN (4 mm x 6 mm x 0.75 mm) |
| Тип монтажа | Surface Mount |
| Уровень MSL | 1 |
| Статус RoHS | Compliant |
Конфигурация выводов LTC3576EUFE-1#TRPBF
| Контакт 1 | VBUS — USB input supply (4.35V to 5.5V) |
| Контакт 2 | WALL — Wall adapter input supply |
| Контакт 3 | BAT — Battery connection |
| Контакт 4 | SENSE — Current sense resistor input |
| Контакт 5 | NTC — Battery thermistor input |
| Контакт 6 | CHRG — Charge status output |
| Контакт 7 | GATE — External ideal diode MOSFET gate drive |
| Контакт 8 | GND — Ground |
| Контакт 9 | VOUT1 — Buck 1 output (1.9V to 3.6V) |
| Контакт 10 | FB1 — Buck 1 feedback |
| Контакт 11 | SW1 — Buck 1 switch node |
| Контакт 12 | PGND1 — Power ground buck 1 |
| Контакт 13 | VIN1 — Buck 1 input |
| Контакт 14 | VOUT2 — Buck 2 output (1.8V to 3.4V) |
| Контакт 15 | FB2 — Buck 2 feedback |
| Контакт 16 | SW2 — Buck 2 switch node |
| Контакт 17 | PGND2 — Power ground buck 2 |
| Контакт 18 | VIN2 — Buck 2 input |
| Контакт 19 | VOUT3 — Buck 3 output (1.0V to 1.8V) |
| Контакт 20 | FB3 — Buck 3 feedback |
| Контакт 21 | SW3 — Buck 3 switch node |
| Контакт 22 | PGND3 — Power ground buck 3 |
| Контакт 23 | VIN3 — Buck 3 input |
| Контакт 24 | BOOST — USB OTG boost output |
| Контакт 25 | SW_BST — OTG boost switch node |
| Контакт 26 | BST_SNS — OTG boost sense |
| Контакт 27 | SDA — I2C data (LTC3576-1) |
| Контакт 28 | SCL — I2C clock (LTC3576-1) |
| Контакт 29 | INT — Interrupt output (LTC3576-1) |
| Контакт 30 | ADJ — Charge current adjust |
| Контакт 31 | PROG — Programming pin |
| Контакт 32 | TIMER — Charge timer capacitor |
| Контакт 33 | ACPR — AC present indicator |
| Контакт 34 | EN — Enable input |
| Контакт 35 | SYNC — Frequency synchronization |
| Контакт 36 | RT — Timing resistor |
| Контакт 37 | NC — Not connected (per datasheet) |
| Контакт 38 | NC — Not connected (per datasheet) |
Типичное применение
LTC3576EUFE-1#TRPBF подходит для 6 применениеs: Handheld Medical Devices, Portable Industrial Terminals, USB-Powered Embedded Systems, Point-of-Sale (POS) Terminals, Portable Test & Measurement, Wearable Consumer Electronics.
Handheld Medical Devices
The LTC3576EUFE-1#TRPBF fits handheld medical devices such as portable patient monitors, infusion pumps, and point-of-care diagnostics where USB charging, battery backup, and multiple regulated rails are essential. The integrated PowerPath manager arbitrates between USB 5V, wall adapter, and Li-Ion battery, automatically prioritizing the external source while maintaining uninterrupted system power. The three buck outputs (400 mA/400 mA/1 A) directly power the medical SoC core, I/O ring, and a high-current 1 A rail for wireless radios or displays. The ideal diode controller eliminates the forward drop of a Schottky diode, extending battery runtime by 3-5% versus discrete implementations. USB OTG support enables the device to power external accessories such as barcode scanners or Bluetooth modules directly from the host battery.
Рекомендуется
Portable Industrial Terminals
Industrial handheld terminals such as barcode scanners, RFID readers, and field-service tablets benefit from the LTC3576EUFE-1's wide input voltage range (4.35V to 5.5V) and robust OVP protection on VBUS and WALL pins. The switching PowerPath topology achieves greater than 90% efficiency across the battery discharge curve, reducing thermal stress in sealed enclosures where convection cooling is limited. The three programmable buck outputs cover typical industrial SoC requirements: 3.3V for logic, 1.8V for I/O, and 1.2V at 1 A for the application processor core. The exposed-pad QFN package allows direct PCB heatsinking through thermal vias, enabling reliable operation across -40C to +85C industrial temperature ranges.
Рекомендуется
USB-Powered Embedded Systems
Embedded systems powered solely from USB benefit from the LTC3576EUFE-1's USB-compliant input current limiting and integrated battery charging. The IC properly negotiates with USB hosts using the USB specification's 100 mA/500 mA/900 mA load rules, preventing host port shutdowns during enumeration. The three buck converters deliver clean rails to microcontrollers, FPGAs, and RF transceivers from a single 5 V USB source, with automatic switchover to battery backup during host power loss. The -1 variant's I2C programmability allows the host MCU to read charger status, adjust charge current, and configure OTG behavior at runtime, all over the same I2C bus used for peripheral control.
Рекомендуется
Point-of-Sale (POS) Terminals
Mobile POS terminals with card readers, thermal printers, and wireless connectivity require a PMIC that can manage simultaneous battery charging, system regulation, and accessory power. The LTC3576EUFE-1's USB OTG boost mode allows the terminal to power external peripherals such as mag-stripe readers or receipt printers directly from its internal battery, eliminating the need for a separate boost converter. The PowerPath manager provides seamless source transition when the terminal is plugged into a charging cradle, and the ideal diode prevents reverse current flow into a depleted battery during cramming events. The three buck rails provide 3.3V logic, 1.8V for the secure element, and 1 A for the application processor running transaction software.
Рекомендуется
Portable Test & Measurement
Battery-powered oscilloscopes, multimeters, and signal analyzers use the LTC3576EUFE-1 to deliver clean analog power rails while operating from Li-Ion cells. The low-noise switching topology combined with the integrated buck regulators minimizes ripple on sensitive measurement channels, critical for ADC reference accuracy and front-end amplifier SNR. The PowerPath manager enables the instrument to operate continuously from a wall adapter while simultaneously charging the battery, with automatic switchover to battery for field use. The 1 A buck rail can power high-current DSP or FPGA processing blocks used for FFT computation, while the 400 mA rails serve analog signal conditioning and ADC drivers.
Рекомендуется
Wearable Consumer Electronics
Smartwatches, fitness bands, and AR glasses use the LTC3576EUFE-1 to maximize battery life in compact form factors. The high-efficiency synchronous buck converters (>90% at typical loads) extend runtime versus linear regulators, while the PowerPath manager eliminates a separate charging IC, freeing PCB area for sensors and antennas. The three programmable output voltages (3.6V for display, 1.8V for sensor I/O, 1.0V at 1 A for SoC core) match the typical power tree of low-power wearable SoCs. USB OTG support enables accessories such as charging cradles and debug interfaces to be powered from the device. The 4 mm x 6 mm QFN footprint suits ultra-compact wearable PCBs.
Рекомендуется
Сводка рекомендуемых товаров
Справочные инженерные данные для LTC3576EUFE-1#TRPBF — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | LTC3576EUFE#TRPBF | LTC3576EUFE-1#PBF | LTC3576EUFE#PBF |
|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 38-pin QFN (4x6) | 38-pin QFN (4x6) - same | 38-pin QFN (4x6) - same | 38-pin QFN (4x6) - same |
| I2C Programmable | Yes (full register access) | Limited I2C | Yes (full register access) | Limited I2C |
| Packaging | Tape & Reel (2500 pcs) | Tape & Reel | Tray | Tray |
| Input Voltage Range | 4.35V to 5.5V | 4.35V to 5.5V | 4.35V to 5.5V | 4.35V to 5.5V |
| Buck Output 1 | 1.9V to 3.6V @ 400 mA | 1.9V to 3.6V @ 400 mA | 1.9V to 3.6V @ 400 mA | 1.9V to 3.6V @ 400 mA |
| Buck Output 2 | 1.8V to 3.4V @ 400 mA | 1.8V to 3.4V @ 400 mA | 1.8V to 3.4V @ 400 mA | 1.8V to 3.4V @ 400 mA |
| Buck Output 3 | 1.0V to 1.8V @ 1 A | 1.0V to 1.8V @ 1 A | 1.0V to 1.8V @ 1 A | 1.0V to 1.8V @ 1 A |
| USB OTG Boost | Yes (I2C controlled) | Yes (hardware mode) | Yes (I2C controlled) | Yes (hardware mode) |
| Pricing (1k pcs, USD) | 6.55 | approx. 6.20 | approx. 7.10 | approx. 6.80 |
Ключевые отличия
- Full I2C register access for runtime charger and OTG configuration (против LTC3576EUFE#TRPBF)
- Tape-and-reel factory packaging for high-volume SMT assembly (против LTC3576EUFE-1#PBF)
- Integrated USB OTG boost eliminates external boost converter (против Discrete charger ICs (e.g., LTC4055))
Заметки по проектированию
The 38-pin QFN package dissipates up to approximately 2 W under worst-case full-load charging (Vin=5V, Ichg=1A, Vbat=4.2V). The exposed thermal pad MUST be soldered to a PCB copper pour of at least 25 mm² with thermal vias (8-12 vias, 0.3 mm drill) to a bottom-layer copper flood to maintain junction temperature within the 125C limit. Without proper thermal management, the internal thermal shutdown will trigger at approximately 150C, causing intermittent system resets during heavy charging loads.
Place all input capacitors (VBUS, WALL, BAT) within 2 mm of their respective IC pins using low-ESR X5R/X7R ceramics with 10 µF minimum capacitance. The buck converter input capacitors (VIN1/VIN2/VIN3) should be placed within 1 mm of their pins. Keep the switch node traces (SW1/SW2/SW3) short and avoid routing analog feedback traces (FB1/FB2/FB3) parallel to switch nodes to minimize noise coupling. The exposed pad must be a continuous copper region with no thermal relief spokes to maximize heat spreading.
Three common pitfalls to avoid: (1) Do not omit the NTC thermistor network on the NTC pin - it is required for safe Li-Ion charging and the charger will refuse to start without it. (2) The PROG pin resistor sets the charge current; using a value outside the 1 kΩ to 100 kΩ range can cause charging instability or thermal runaway. (3) On the LTC3576EUFE-1 (I2C variant), the SDA/SCL lines require 4.7 kΩ pull-ups to VIO - leaving them floating will prevent all I2C communication and charger monitoring.
Информация о соответствии
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified - this part targets consumer/commercial/handheld medical designs rather than automotive. Halogen-free status not explicitly stated in verified data.
