LTM8074IY#PBF - 40V/1.2A Silent Switcher µModule | Analog Devices
N.º de pieza: LTM8074IY#PBF ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $11.25 | $11,25 |
| 10 | $10.46 | $104,60 |
| 100 | $9.21 | $921,00 |
| 500 | $8.04 | $4.020,00 |
| 1.000 | $7.1 | $7.100,00 |
LTM8074IY#PBF Descripción general
What is a µModule regulator? A µModule (micromodule) regulator is a complete, factory-assembled DC-DC switching power supply packaged as a single surface-mount IC, integrating the controller IC, power inductor, MOSFET switches, and compensation network inside the package. It sits hierarchically between discrete buck regulators and full isolated brick converters in the power-management-IC taxonomy: discrete buck -> µModule regulator -> isolated PoL -> power management IC -> semiconductor. µModules dramatically shorten design time, reduce PCB footprint, and solve the layout-driven noise and thermal issues that plague discrete buck implementations.
Key features include a wide 3.2V to 40V input range, an adjustable 0.8V to 12V output, internal feedback loop compensation, programmable soft-start, and an operating junction temperature range of -40°C to +125°C for industrial-grade deployment. The Silent Switcher topology uses split-parallel internal capacitors to cancel the hot-loop di/dt, allowing the part to pass stringent EMI standards (CISPR 22 Class B, CISPR 25) without complex shielding. Synchronizable to an external clock from 200 kHz to 2.2 MHz avoids beat-frequency interference in multi-rail systems.
The Silent Switcher 2 architecture uses integrated ceramic capacitors across the internal hot loop to nearly eliminate radiated EMI, enabling use in noise-sensitive environments like automotive ADAS, industrial sensor arrays, and RF front-end bias supplies. Compared with conventional buck ICs at the same input/output range, the LTM8074IY#PBF's monolithic integration delivers a typical efficiency above 90% at 12V-to-5V/0.5A, with internal current mode control providing line and load regulation across the operating envelope.
Typical applications include industrial 24V bus point-of-load conversion, automotive body and ADAS sensor rails, factory automation backplanes, general-purpose 5V/3.3V PoL for FPGA, MCU, and ASIC rails, and low-EMI medical instrumentation power. The over-molded body supports the BGA solder joints against mechanical stress, and the dual-bank GND paddle structure provides both low-impedance return paths and a primary thermal dissipation route.
When designing with this device, derate output current for ambient temperature above 85°C and provide sufficient PCB copper area beneath the module's GND banks, which carry most of the heat out of the package. The exposed BGA pads must be soldered to inner-plane copper for thermal spreading; a 1oz copper pour of roughly 1 cm² directly below the module typically limits junction temperature rise to about 20°C at full load. Input bulk capacitance placement near the input balls minimizes reflected input ripple.
This page synthesizes distributor pricing, drop-in alternatives, BGA thermal design notes, and Silent Switcher EMI mitigation guidance that go beyond what the manufacturer datasheet presents in isolation.
Alternativas directas para LTM8074IY#PBF — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
LTM8074EY#PBF
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LTM8074IY
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LTM8074IY#PBF Valores máximos y características eléctricas
| Topología | Step-Down (Buck) µModule Regulator |
| Rango de tensión de entrada | 3.2 V to 40 V |
| Rango de tensión de salida | 0.8 V to 12 V (adjustable) |
| Continuous Output Current | 1.2 A |
| Peak Output Current | 1.75 A |
| Frecuencia de conmutación | Up to 2.2 MHz (programmable/sync) |
| Architecture | Silent Switcher (low EMI) |
| Feedback Loop Compensation | Internal |
| Arranque suave | Programmable |
| Rango de temperatura de funcionamiento | -40 °C to +125 °C (industrial) |
| Encapsulado | 25-ball BGA, over-molded, 4 mm x 4 mm x 1.25 mm |
| Tipo de montaje | Surface Mount |
| Isolation | Non-Isolated PoL |
| Nivel MSL | 3 |
| RoHS Compliance | RoHS compliant |
| Tipo de salida | Adjustable (single) |
| Synchronization | External clock 200 kHz to 2.2 MHz |
Configuración de pines de LTM8074IY#PBF
| Pin A1 | GND — Ground Bank 1 |
| Pin A2 | GND — Ground Bank 1 |
| Pin A3 | VIN — Input Supply |
| Pin A4 | VIN — Input Supply |
| Pin A5 | VIN — Input Supply |
| Pin B1 | GND — Ground Bank 1 |
| Pin B2 | GND — Ground Bank 1 |
| Pin B3 | VIN — Input Supply |
| Pin B4 | VIN — Input Supply |
| Pin B5 | VIN — Input Supply |
| Pin C1 | SW — Switch Node Bank 1 |
| Pin C2 | SW — Switch Node Bank 1 |
| Pin C3 | BST — Bootstrap Bank 1 |
| Pin C4 | VOUT — Output Voltage |
| Pin C5 | VOUT — Output Voltage |
| Pin D1 | GND — Ground Bank 2 |
| Pin D2 | GND — Ground Bank 2 |
| Pin D3 | VOUT — Output Voltage |
| Pin D4 | VOUT — Output Voltage |
| Pin D5 | FB — Feedback |
| Pin E1 | TR/SS — Soft-Start / Timing Resistor |
| Pin E2 | RT — Frequency Setting Resistor |
| Pin E3 | SYNC — External Clock Sync |
| Pin E4 | PGOOD — Power Good Indicator |
| Pin E5 | RUN — Run / Enable Control |
Aplicaciones típicas
LTM8074IY#PBF es adecuado para 6 aplicacións: Industrial 24V Bus Point-of-Load Regulation, Automotive ADAS Sensor Power, Factory Automation Backplane Power, FPGA/MCU Point-of-Load Rails, Low-EMI Medical Instrumentation, General-Purpose 5V/3.3V Distributed Power.
Industrial 24V Bus Point-of-Load Regulation
The LTM8074IY#PBF is purpose-built for industrial 24V bus point-of-load conversion thanks to its 3.2V-40V input envelope that survives 24V nominal with wide transient margin, its 1.2A continuous output suitable for FPGA, MCU, and ASIC core rails, and its Silent Switcher architecture that meets CISPR 22 Class B on factory floor installations. The 4mm x 4mm over-molded BGA drops onto the underside of dense control boards, freeing topside real estate for signal conditioning. Designed-in input bulk capacitance of 4.7µF X7R near the VIN balls keeps reflected input ripple below 50mVpk at full 1.2A load.
Recomendado
Automotive ADAS Sensor Power
For ADAS radar and camera modules the LTM8074IY#PBF delivers clean 3.3V or 5V rails from a 12V automotive battery, with industrial-grade -40°C to +125°C operation tolerating under-hood thermal stress and 40V input survival that handles 24V jump-start events. Silent Switcher EMI performance eases CISPR 25 radiated emissions compliance for noise-sensitive mmWave radar front ends. Add a TVS diode such as SMBJ33A at the input for ISO 7637-2 transient protection, and pair with a ferrite bead to suppress any residual common-mode noise on the 12V supply line.
Recomendado
Factory Automation Backplane Power
Factory automation backplanes demand robust, EMI-quiet DC-DC conversion for PLC digital I/O, sensor analog front-end, and communication transceivers sharing a 24V trunk. The LTM8074IY#PBF's 40V input withstands motor back-EMF events common in factory environments, and its internal compensation eliminates the need for external RC network tuning during backplane design. Synchronization to an external 1MHz clock avoids beat-frequency interference with adjacent rails on the same backplane. The 25-ball BGA reflows cleanly on standard SAC305 lead-free profiles and survives the thermal cycling of industrial deployment.
Recomendado
FPGA/MCU Point-of-Load Rails
The LTM8074IY#PBF is ideal for powering FPGA core, MCU, and ASIC rails from a 5V or 12V intermediate bus, providing 1.2A continuous (1.75A peak) to absorb inrush transients during processor startup. The 2.2MHz maximum switching frequency enables small output filters and keeps the fundamental switching noise well above sensitive analog baseband. External clock synchronization to the FPGA's clock tree eliminates asynchronous beat frequencies. Internal soft-start programming via the TR/SS pin prevents inrush current that would otherwise sag the upstream rail during multi-FPGA system boot.
Recomendado
Low-EMI Medical Instrumentation
Medical instrumentation such as patient monitors, ultrasound front-end boards, and portable diagnostic devices demand low-EMI power rails to avoid coupling switching noise into sensitive analog signal chains. The LTM8074IY#PBF's Silent Switcher architecture achieves CISPR 11 Class B compliance for medical EMC standards with minimal external filtering, and its 4mm x 4mm BGA profile fits portable handheld form factors. The wide input range accommodates 12V or 24V medical-grade AC-DC adapters, while the adjustable 0.8V to 12V output supports core, I/O, and analog supply voltages from a single module.
Recomendado
General-Purpose 5V/3.3V Distributed Power
The LTM8074IY#PBF serves as a general-purpose 5V and 3.3V distributed power source in telecom cards, embedded computing boards, and test equipment. Its 3.2V to 40V input accepts a wide range of upstream rails (5V, 12V, 24V, 36V), and the 1.2A continuous output handles multiple low-power loads with a single module. The Silent Switcher 2 hot-loop cancellation eliminates the shielded inductors and complex PCB stackups that discrete buck designs require, reducing design time and BOM cost while improving EMI performance.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para LTM8074IY#PBF — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | LTM8074EY#PBF | LTM8074IY | LTM8005IY |
|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 25-ball BGA, 4mm x 4mm | 25-ball BGA, 4mm x 4mm - same | 25-ball BGA, 4mm x 4mm - same | Different BGA ballout |
| Architecture | Silent Switcher | Silent Switcher | Silent Switcher | Silent Switcher |
| Operating Temperature | -40°C to +125°C (industrial) | Extended grade | -40°C to +125°C | -40°C to +125°C |
Diferenciadores clave
- Industrial-grade temperature rating with full ADI warranty (frente a LTM8074IY (non-PBF))
- Same-package extended temperature variant available (frente a LTM8074EY#PBF)
- Silent Switcher EMI advantage over conventional buck modules (frente a LTM8005IY)
Notas de diseño
Estimated: At VIN=24V, VOUT=5V, IOUT=1.2A, dissipation is approximately (24-5)*1.2 = 22.8W minus switching losses. Most heat exits through the GND balls; provide at least 1 cm² of 1oz copper directly beneath Bank 1 and Bank 2 GND pads on inner PCB planes, with thermal vias stitching to a bottom-side copper pour. Without adequate spreading, junction temperature can exceed the 125°C maximum at full output current and elevated ambient. Reference the LTM8074 datasheet layout section for the recommended land pattern.
Place 2.2µF X7R input ceramic capacitors as close as possible to the VIN balls (within 2mm) to minimize the high-frequency hot-loop inductance that couples switching noise into the input rail. Add a 4.7µF X7R output capacitor near the VOUT balls to control output ripple. Avoid routing signal traces beneath the BGA pads - the exposed BGA pads must be soldered to a continuous copper plane for both electrical connection and thermal dissipation. Use 4-mil trace-and-space rules for the feedback and SYNC routing.
Do not exceed the 40V absolute maximum input voltage - even brief transients above 40V will permanently damage the internal power switches. Add a 36V TVS such as SMBJ36A on the input for automotive load-dump compliance. Avoid operating without the BST capacitor installed; the bootstrap capacitor is required for the high-side switch gate drive. Confirm the FB resistor divider is sized for the desired output voltage using the datasheet's VFB reference of 0.8V, with 1% tolerance resistors for accuracy.
Información de cumplimiento
RoHS compliant per the LTM8074 datasheet. PBF suffix denotes Pb-free lead finish. Industrial-grade temperature rating (-40°C to +125°C); AEC-Q100 automotive qualification not present on this part number - contact Analog Devices for automotive-grade variants.
