LTC3576EUFE-1#TRPBF - PMIC, USB OTG + 3x Buck | Analog Devices
N.º da peça: LTC3576EUFE-1#TRPBF ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 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 Visão geral
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.
Alternativas drop-in para LTC3576EUFE-1#TRPBF — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com LTC3576EUFE-1#TRPBF (mesmo formato e footprint) — diferindo em Operating Temperature, Package, RoHS Status, Topology, Overvoltage Protection.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
LTC3576EUFE#TRPBF
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
LTC3576EUFE-1#PBF
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$4.6 / unidade
Ver ficha técnica →LTC3576EUFE#PBF
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
LTC3576EUFE-1#TRPBF Especificações
| 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 |
| Topologia | 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) |
| Temperatura de operação | -40C to +85C |
| Encapsulamento | 38-pin QFN (4 mm x 6 mm x 0.75 mm) |
| Tipo de montagem | Surface Mount |
| Nível MSL | 1 |
| Status RoHS | Compliant |
Configuração de pinos do LTC3576EUFE-1#TRPBF
| Pino 1 | VBUS — USB input supply (4.35V to 5.5V) |
| Pino 2 | WALL — Wall adapter input supply |
| Pino 3 | BAT — Battery connection |
| Pino 4 | SENSE — Current sense resistor input |
| Pino 5 | NTC — Battery thermistor input |
| Pino 6 | CHRG — Charge status output |
| Pino 7 | GATE — External ideal diode MOSFET gate drive |
| Pino 8 | GND — Ground |
| Pino 9 | VOUT1 — Buck 1 output (1.9V to 3.6V) |
| Pino 10 | FB1 — Buck 1 feedback |
| Pino 11 | SW1 — Buck 1 switch node |
| Pino 12 | PGND1 — Power ground buck 1 |
| Pino 13 | VIN1 — Buck 1 input |
| Pino 14 | VOUT2 — Buck 2 output (1.8V to 3.4V) |
| Pino 15 | FB2 — Buck 2 feedback |
| Pino 16 | SW2 — Buck 2 switch node |
| Pino 17 | PGND2 — Power ground buck 2 |
| Pino 18 | VIN2 — Buck 2 input |
| Pino 19 | VOUT3 — Buck 3 output (1.0V to 1.8V) |
| Pino 20 | FB3 — Buck 3 feedback |
| Pino 21 | SW3 — Buck 3 switch node |
| Pino 22 | PGND3 — Power ground buck 3 |
| Pino 23 | VIN3 — Buck 3 input |
| Pino 24 | BOOST — USB OTG boost output |
| Pino 25 | SW_BST — OTG boost switch node |
| Pino 26 | BST_SNS — OTG boost sense |
| Pino 27 | SDA — I2C data (LTC3576-1) |
| Pino 28 | SCL — I2C clock (LTC3576-1) |
| Pino 29 | INT — Interrupt output (LTC3576-1) |
| Pino 30 | ADJ — Charge current adjust |
| Pino 31 | PROG — Programming pin |
| Pino 32 | TIMER — Charge timer capacitor |
| Pino 33 | ACPR — AC present indicator |
| Pino 34 | EN — Enable input |
| Pino 35 | SYNC — Frequency synchronization |
| Pino 36 | RT — Timing resistor |
| Pino 37 | NC — Not connected (per datasheet) |
| Pino 38 | NC — Not connected (per datasheet) |
Aplicações típicas
LTC3576EUFE-1#TRPBF é adequado para 6 aplicaçãos: 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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para LTC3576EUFE-1#TRPBF — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | 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 |
Principais diferenciais
- Full I2C register access for runtime charger and OTG configuration (vs LTC3576EUFE#TRPBF)
- Tape-and-reel factory packaging for high-volume SMT assembly (vs LTC3576EUFE-1#PBF)
- Integrated USB OTG boost eliminates external boost converter (vs Discrete charger ICs (e.g., LTC4055))
Notas de projeto
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.
Informações de conformidade
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.
