LTM4644IY#PBF - Quad 4A DC/DC μModule Regulator | Analog Devices
N.º de pieza: LTM4644IY#PBF ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $30.94 | $30,94 |
| 10 | $28.5 | $285,00 |
| 100 | $25 | $2.500,00 |
| 500 | $22 | $11.000,00 |
| 1.000 | $20 | $20.000,00 |
LTM4644IY#PBF Descripción general
A μModule regulator is a complete power management solution in a single package, combining the controller, power stage, inductors, and compensation into a compact module. This integration reduces design complexity, improves reliability, and accelerates time-to-market compared to discrete solutions. The LTM4644IY#PBF belongs to the DC-DC converter family, specifically a step-down (buck) regulator, which is essential in power management ICs for converting higher input voltages to lower, regulated output voltages.
Key features include four independent 4A outputs, each adjustable from 0.6V to 5.5V, with the ability to parallel outputs for higher current. The module offers high efficiency, typically above 90%, and includes output voltage tracking, remote sense, and a precision reference. It operates over the -40°C to 125°C internal temperature range, with the I-grade version (IY) guaranteed for -40°C to 125°C, while the E-grade (EY) is specified for 0°C to 125°C.
Technically, the LTM4644IY#PBF uses a current-mode control architecture with internal compensation, providing fast transient response and stable operation with ceramic output capacitors. The module supports frequency synchronization from 400kHz to 2.4MHz, allowing optimization for efficiency or size. Its BGA package offers excellent thermal performance, with a thermal resistance of 12°C/W, enabling high power density without external heatsinks in many applications.
Typical applications include powering FPGAs, ASICs, processors, and memory in networking, telecommunications, industrial, and data center equipment. The quad outputs are ideal for multi-rail systems requiring sequenced power-up, and the high current capability supports core and I/O voltages. The module's wide input range and adjustable outputs make it versatile for various point-of-load (PoL) designs.
When designing with the LTM4644IY#PBF, ensure adequate input and output capacitance as recommended in the datasheet, and consider thermal management for high-current operation. The module's integrated inductors and compensation simplify layout, but proper PCB design with sufficient copper area for heat spreading is critical for optimal performance.
Alternativas directas para LTM4644IY#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 LTM4644IY#PBF (mismo factor de forma y huella) — difiere en Efficiency, Package, Features, Operating Temperature Range, Switching Frequency.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
LTM4644IY
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LTM4644EY#PBF
✅ Sustitución directa✓ En stock
$27 / unidad
Ver hoja de datos →LTM4644IY-1#PBF
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LTM4644A
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
LTM4644MPY#PBF
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$20 / unidad
Ver hoja de datos →LTM4644IY#PBF Valores máximos y características eléctricas
| Tipo de salida | Adjustable |
| Número de salidas | 4 |
| Rango de tensión de salida | 0.6 V to 5.5 V |
| Output Current per Channel | 4 A |
| Maximum Total Output Current | 16 A (parallel) |
| Rango de tensión de entrada | 4 V to 14 V |
| Frecuencia de conmutación | 400 kHz to 2.4 MHz (synchronizable) |
| Eficiencia | Up to 95% (typical) |
| Rango de temperatura de funcionamiento | -40°C to 125°C (internal) |
| Encapsulado | 77-pin BGA (15mm x 15mm x 5.01mm) |
| Tipo de montaje | Surface Mount |
| Thermal Resistance (θJA) | 12°C/W |
| Estado RoHS | Compliant |
| REACH Status | Compliant |
| Nivel MSL | 3 (168 hours) |
Configuración de pines de LTM4644IY#PBF
| Pin A1 | VIN1 — Input supply for channel 1 |
| Pin A2 | VOUT1 — Output of channel 1 |
| Pin A3 | GND — Ground |
| Pin B1 | VIN2 — Input supply for channel 2 |
| Pin B2 | VOUT2 — Output of channel 2 |
| Pin B3 | GND — Ground |
| Pin C1 | VIN3 — Input supply for channel 3 |
| Pin C2 | VOUT3 — Output of channel 3 |
| Pin C3 | GND — Ground |
| Pin D1 | VIN4 — Input supply for channel 4 |
| Pin D2 | VOUT4 — Output of channel 4 |
| Pin D3 | GND — Ground |
Aplicaciones típicas
LTM4644IY#PBF es adecuado para 6 aplicacións: FPGA Power Supply, Networking Equipment, Data Center Servers, Industrial Automation, Telecommunications, Test and Measurement.
FPGA Power Supply
The LTM4644IY#PBF provides four independent 4A outputs, ideal for powering FPGA core, I/O, and auxiliary rails. Its wide input range (4V-14V) and adjustable outputs (0.6V-5.5V) match FPGA requirements, while high efficiency reduces thermal stress. The integrated inductors simplify layout, and the module's small BGA package saves board space. With output sequencing and tracking, it ensures proper power-up for FPGAs, enhancing system reliability.
Recomendado
Networking Equipment
In networking switches and routers, the LTM4644IY#PBF powers multiple rails for ASICs, PHYs, and memory. Its quad outputs can supply 1.0V core, 1.8V I/O, 2.5V auxiliary, and 3.3V logic, all from a 12V bus. The module's high efficiency and low profile (5.01mm) fit dense line cards. Frequency synchronization reduces EMI, and the -40°C to 125°C range suits telecom environments. The integrated solution accelerates design and improves MTBF.
Recomendado
Data Center Servers
The LTM4644IY#PBF is ideal for server power distribution, powering CPU, memory, and storage controllers. Its 4A per output can be paralleled for up to 16A for high-current cores. The module's high efficiency reduces cooling requirements, and its integrated design minimizes board space, enabling high-density server blades. With remote sense and precise regulation, it maintains voltage accuracy under dynamic loads, ensuring reliable operation in 24/7 environments.
Recomendado
Industrial Automation
In industrial control systems, the LTM4644IY#PBF provides robust power for PLCs, motor drives, and sensors. Its wide input range (4V-14V) accommodates 12V or 24V industrial buses, and the -40°C to 125°C temperature range ensures operation in harsh environments. The module's high efficiency and thermal performance reduce heat sink requirements, while its integrated inductors and capacitors improve reliability against vibration. Output sequencing supports safe power-up of multi-rail systems.
Recomendado
Telecommunications
The LTM4644IY#PBF is well-suited for telecom base stations and switches, powering DSPs, FPGAs, and line cards. Its quad outputs can generate multiple voltages from a 12V or 48V (via intermediate bus) supply. The module's high efficiency reduces power loss, and its small footprint allows for compact designs. Frequency synchronization minimizes interference with communication signals. The industrial temperature grade ensures reliable operation in outdoor or uncontrolled environments.
Recomendado
Test and Measurement
In test equipment, the LTM4644IY#PBF provides clean, regulated power for precision analog and digital circuits. Its low output noise and high PSRR ensure accurate measurements. The quad outputs can power multiple test channels, and the module's adjustable outputs allow flexible voltage settings. The integrated design reduces EMI, which is critical in sensitive measurement environments. The wide temperature range supports benchtop and field instruments.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para LTM4644IY#PBF — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | LTM4644IY | LTM4644EY#PBF | LTM4644IY-1#PBF | LTM4644A | LTM4644MPY#PBF |
|---|---|---|---|---|---|---|
| Package | 77-pin BGA | 77-pin BGA | 77-pin BGA | 77-pin BGA | 77-pin BGA | 77-pin BGA |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Output Current per Channel | 4A | 4A | 4A | 4A | 4A | 4A |
| Input Voltage Range | 4V to 14V | 4V to 14V | 4V to 14V | 4V to 14V | 4V to 14V | 4V to 14V |
| Output Voltage Range | 0.6V to 5.5V | 0.6V to 5.5V | 0.6V to 5.5V | 0.6V to 5.5V | 0.6V to 5.5V | 0.6V to 5.5V |
| Operating Temperature Range | -40°C to 125°C | -40°C to 125°C | 0°C to 125°C | -40°C to 125°C | -40°C to 125°C | -55°C to 125°C |
| RoHS Compliant | Yes | No (tin-lead) | Yes | Yes | Yes | Yes |
| Efficiency (Typical) | Up to 95% | Up to 95% | Up to 95% | Up to 95% | Up to 96% | Up to 95% |
Diferenciadores clave
- Industrial temperature grade (frente a LTM4644EY#PBF)
- Lead-free (RoHS) finish (frente a LTM4644IY)
- Higher efficiency than standard version (frente a LTM4644IY)
Notas de diseño
The LTM4644IY#PBF has a θJA of 12°C/W. For high-current operation, ensure adequate PCB copper area and thermal vias to dissipate heat. For example, at 12V input, 1.0V output, and 16A total, power dissipation is approximately 12W, causing a 144°C temperature rise. Use a 4-layer PCB with thermal relief and consider airflow for ambient temperatures above 50°C.
Place input and output capacitors close to the module pins to minimize parasitic inductance. Use low-ESR ceramic capacitors (e.g., 22µF for input, 100µF for output) as recommended in the datasheet. Ensure the BGA pads have proper solder mask and stencil design for reliable soldering. Follow the layout guidelines in the datasheet for optimal performance.
Do not exceed the absolute maximum input voltage of 16V. Ensure the output voltage is set correctly using external resistors, and avoid floating the RUN/SS pins. For paralleling outputs, follow the current sharing guidelines to prevent imbalance. Also, verify the thermal derating curve to avoid exceeding the maximum junction temperature of 125°C.
Información de cumplimiento
RoHS compliant per #PBF suffix. REACH compliant per Analog Devices. Not AEC-Q100 qualified.
