LTC3576EUFE-1#PBF - USB OTG PMIC + Triple Buck | ADI
N.º de pieza: LTC3576EUFE-1#PBF ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $7.95 | $7,95 |
| 10 | $7.2 | $72,00 |
| 100 | $6.1 | $610,00 |
| 500 | $5.25 | $2.625,00 |
| 1.000 | $4.6 | $4.600,00 |
LTC3576EUFE-1#PBF Descripción general
A power management IC (PMIC) integrates multiple voltage regulators, charge controllers, supervisory blocks, and protection circuits into a single die to reduce board area, BOM count, and design complexity. Within the broader hierarchy, the LTC3576EUFE-1 belongs to the PMIC subcategory of power management ICs, which itself sits inside the analog/mixed-signal IC family. The -1 variant differs from the base LTC3576 in that most of its advanced features, including switching frequency, charge current, and input current limit, are only accessible through the I2C serial interface, allowing dynamic host-controlled reconfiguration of the entire power tree.
The bidirectional switching PowerPath topology allows current to flow from the wall adapter, USB, or battery to the system load with seamless, lossless transitions between sources. When external power is removed, the ideal diode keeps VOUT regulated from the battery without a discrete MOSFET, minimizing reverse leakage. An adjustable overvoltage clamp on VBUS and WALL protects the IC from transients using just two external components.
Typical applications include handheld and mobile devices, portable medical instruments, USB OTG peripherals, point-of-sale terminals, and any single-cell Li-Ion system that needs simultaneous USB charging and three regulated system rails. The LTC3576EUFE-1 supports autonomous operation once parameters are loaded but also enables a host processor to dynamically tune power sequencing. When designing with this part, allocate adequate copper area for thermal dissipation and follow the reference layout in the manufacturer datasheet for the 4mm x 6mm QFN exposed pad to keep junction temperature within safe limits at full charge and load current.
This page combines the manufacturer datasheet, distributor pricing, drop-in alternatives, and practical design notes into a single reference for engineers selecting a Li-Ion PMIC for handheld designs.
Alternativas directas para LTC3576EUFE-1#PBF — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con LTC3576EUFE-1#PBF (mismo factor de forma y huella) — difiere en Operating Temperature, Overvoltage Protection, Package, RoHS Status, Topology.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
LTC3576EUFE#PBF
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LTC3577EUFE#PBF
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
LTC3577EUFE-1#PBF
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
LTC3586EUFE#PBF
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
LTC3586EUFE-1#PBF
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
LTC3576EUFE-1#PBF Especificaciones
| Topología | PowerPath manager + 3x synchronous buck + battery charger |
| Battery Chemistry | Li-Ion / Li-Polymer (single cell) |
| Buck Converter 1 Output | 1.9 V to 3.6 V at 400 mA |
| Buck Converter 2 Output | 1.8 V to 3.4 V at 400 mA |
| Buck Converter 3 Output | 1.0 V to 1.8 V at 1 A |
| Número de pines | 38 |
| Encapsulado | QFN-38 (4 mm x 6 mm x 0.75 mm) |
| Tipo de montaje | Surface Mount |
| USB On-the-Go Support | Yes (bidirectional) |
| Configuration Interface | I2C (LTC3576-1 variant) |
| Overvoltage Protection | Yes (VBUS / WALL, adjustable clamp) |
| Battery Charger Type | CC/CV with programmable current |
| Temperatura de funcionamiento | -40 C to +85 C (industrial grade) |
| Estado RoHS | Compliant (#PBF suffix) |
Guía de configuración de pines de LTC3576EUFE-1#PBF qfn-38 (4 mm x 6 mm x 0.75 mm)
Configuración de pines para LTC3576EUFE-1#PBF (encapsulado qfn-38 (4 mm x 6 mm x 0.75 mm)). La numeración de pines, las funciones y los diagramas de conexión se definen en la hoja de datos del fabricante. Consúltela para conocer el footprint exacto y las directrices de soldadura.
No hay datos detallados de patillaje disponibles para LTC3576EUFE-1#PBF.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
LTC3576EUFE-1#PBF es adecuado para 6 aplicacións: Handheld Mobile Devices, Portable Medical Instruments, USB OTG Peripherals, Point-of-Sale Terminals, Industrial Handheld Scanners, Portable Test and Measurement.
Handheld Mobile Devices
The LTC3576EUFE-1 powers handheld mobile devices by combining a Li-Ion charger, PowerPath manager, and three buck regulators in a 38-pin 4 mm x 6 mm QFN. Its 1 A buck rail can drive a processor core while the two 400 mA rails cover IO and memory, allowing the entire power tree from the USB/wall adapter to the system rails in one IC. The bidirectional PowerPath enables seamless transitions between wall, USB, and battery sources without drops, which is critical for smartphones, rugged handhelds, and wearable terminals that must stay alive during plug events.
Recomendado
Portable Medical Instruments
The LTC3576EUFE-1 is well suited to portable medical instruments such as patient monitors, glucose meters, and handheld ultrasound probes that operate from a single Li-Ion cell. Its integrated charger and three synchronous buck rails minimize board area, while the USB OTG capability allows the instrument to power accessories or transfer data without an external boost converter. The PowerPath topology delivers uninterrupted system voltage during source swaps, a key requirement for medical devices that cannot tolerate a brown-out during patient monitoring.
Recomendado
USB OTG Peripherals
The LTC3576EUFE-1 is widely used in USB On-the-Go peripherals such as portable SSDs, wireless speaker docks, and handheld printers. Its built-in OTG boost function powers 5V USB peripherals from the Li-Ion battery without an external boost IC, while the three buck rails generate the system core, IO, and memory voltages. This integration reduces BOM count and PCB area in space-constrained peripherals that need to act as either USB device or USB host.
Recomendado
Point-of-Sale Terminals
The LTC3576EUFE-1 powers point-of-sale terminals that need a single-cell Li-Ion battery, USB charging, and multiple system rails. The 1 A buck supports an application processor, the 400 mA rails feed Wi-Fi/Bluetooth modules and a thermal printer, and the integrated charger eliminates the need for a standalone charge controller. The PowerPath manager prioritizes external power when present and seamlessly switches to battery when disconnected, keeping transactions alive during brief power interruptions.
Recomendado
Industrial Handheld Scanners
Industrial handheld scanners benefit from the LTC3576EUFE-1's -40 C to +85 C industrial temperature range, integrated Li-Ion charging, and triple-buck output capability. The compact 38-pin 4 mm x 6 mm QFN fits the tight PCBs of barcode scanners and RFID readers, while the I2C interface (-1 variant) allows the host to tune charging current dynamically to balance charge time against thermal limits in harsh environments.
Recomendado
Portable Test and Measurement
The LTC3576EUFE-1 supports portable test and measurement equipment such as handheld oscilloscopes, multimeters, and signal analyzers that require clean, regulated rails for sensitive analog front ends. The triple buck outputs can supply analog, digital, and IO domains with proper isolation between noise-sensitive sections, while the integrated charger and USB OTG simplify field use. Engineers can route a 1 A core rail for an MCU and two 400 mA rails for analog signal conditioning and display subsystems.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para LTC3576EUFE-1#PBF — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | LTC3576EUFE#PBF | LTC3577EUFE#PBF | LTC3577EUFE-1#PBF | LTC3586EUFE#PBF | LTC3586EUFE-1#PBF |
|---|---|---|---|---|---|---|
| Package | QFN-38 (4x6) | QFN-38 (4x6) - same | QFN-38 (4x6) - same | QFN-38 (4x6) - same | QFN-38 (4x6) - same | QFN-38 (4x6) - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Configuration Interface | I2C | Resistor pins (no I2C) | Resistor pins | I2C | Resistor pins | I2C |
| Buck 1 Output | 1.9 V - 3.6 V at 400 mA | 1.9 V - 3.6 V at 400 mA | 1.9 V - 3.6 V at 400 mA | 1.9 V - 3.6 V at 400 mA | 1.9 V - 3.6 V at 400 mA | 1.9 V - 3.6 V at 400 mA |
| Buck 2 Output | 1.8 V - 3.4 V at 400 mA | 1.8 V - 3.4 V at 400 mA | 1.8 V - 3.4 V at 400 mA | 1.8 V - 3.4 V at 400 mA | 1.8 V - 3.4 V at 400 mA | 1.8 V - 3.4 V at 400 mA |
| Buck 3 Output | 1.0 V - 1.8 V at 1 A | 1.0 V - 1.8 V at 1 A | 1.0 V - 1.8 V at 1 A | 1.0 V - 1.8 V at 1 A | 1.0 V - 1.8 V at 1 A | 1.0 V - 1.8 V at 1 A |
| USB OTG Support | Yes | Yes | Yes | Yes | Yes | Yes |
| Battery Charger | CC/CV Li-Ion integrated | CC/CV Li-Ion integrated | CC/CV Li-Ion integrated | CC/CV Li-Ion integrated | CC/CV Li-Ion integrated | CC/CV Li-Ion integrated |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
Diferenciadores clave
- Integrated USB On-the-Go boost function (frente a LTC3566EUF#PBF)
- Three synchronous buck converters in one IC (frente a LTC3553EUD-2#PBF)
- Bidirectional PowerPath manager with ideal diode (frente a LTC4055-1)
Notas de diseño
The 38-pin QFN exposed thermal pad must be soldered to a sufficient copper pour on the top and inner PCB layers to keep junction temperature within the -40 C to +85 C industrial range. At maximum charge current with all three bucks delivering full load, total internal dissipation can reach several hundred milliwatts; route at least 1 square inch of 1 oz copper under the package, with multiple thermal vias to inner planes.
Place the input bulk capacitor on VBUS/WALL as close as possible to the IC pins, with a 1 uF ceramic bypass in parallel. Keep the buck converter inductor loops compact and route the high-di/dt switching nodes away from sensitive analog feedback traces. Use a star-ground topology with the exposed pad as the single low-impedance ground return to avoid ground bounce that could disrupt I2C communication on the -1 variant.
Do not exceed the absolute maximum ratings on VBUS or WALL (typically 7V transient with the integrated OVP clamp active). Confirm that the external high-voltage switching regulator MOSFET is rated for the WALL input spike voltage and that its gate drive is correctly tied to the LTC3576EUFE-1 NDRV pin. On the -1 variant, ensure I2C pull-up resistors are present and that the host initializes the configuration registers before the buck converters are enabled.
Estimate: with 4 layers of 1 oz copper and 1 square inch of top-layer pour under the QFN, the expected theta_JA is approximately 30-35 C/W. At 0.5 W total dissipation the junction temperature rise above ambient is around 17 C, leaving ample margin for the 85 C maximum in enclosed handheld enclosures. Increase the copper area or add a topside copper fill if total dissipation exceeds 0.7 W.
Información de cumplimiento
RoHS and REACH compliant per the #PBF suffix designation. Not AEC-Q100 qualified; this part is targeted at consumer and industrial handheld products. Halogen-free per Analog Devices documentation.
