MAX798ESE - 30V 10A Synchronous Buck Controller | Maxim
N.º de pieza: MAX798ESE ✓ ActivoMAX798ESE Descripción general
A synchronous buck controller is a voltage-regulator IC that controls switches to reduce a higher input voltage to a lower regulated output. The MAX798 belongs to the DC-DC converter, voltage regulator, and power-management IC hierarchy. Unlike a linear regulator, a buck controller actively transfers energy through switching components, making it suitable for higher current and larger input-to-output voltage differences than a simple linear dropper.
The controller provides one adjustable output, with a reported output range of 1.6 V to 6 V. Its current-mode architecture operates at up to 330 kHz, while the MAX798 family is also described as a high-accuracy step-down controller with synchronous rectification. Its 96% efficiency is particularly useful in battery-powered equipment because it reduces the power loss associated with converting battery energy into a low-voltage processor rail.
MAX798 control circuitry manages the transition between operating states and supports battery-focused power conversion. The synchronous-rectifier arrangement reduces conduction loss during the lower-switch interval, while current-mode control provides a controlled inductor-current response. Designers must still select the external MOSFETs, inductor, output capacitors, and compensation network to match the required load and switching performance.
Typical uses include notebook-computer and portable-system CPU rails, battery-powered instrumentation, industrial handheld equipment, and embedded processors requiring a compact, high-efficiency 1.6 V to 6 V supply. The 16-pin SOIC package supports conventional surface-mount assembly, although exposed-pad thermal performance is not specified for this variant.
When designing the converter, verify the external MOSFET voltage and current ratings against the 30 V maximum input. Place the high-current switching loop compactly, connect the power ground and signal ground carefully, and use the datasheet pin-description table when assigning every NC and functional terminal. Component selection should also account for startup, transient response, and thermal rise at the 10 A design limit.
This page organizes the controller's electrical limits, package details, application guidance, design checks, and documented family relationships into a practical engineering reference. It also distinguishes a verified replacement from related or differently ordered MAX79x devices, helping engineers avoid assuming that similar descriptions guarantee pin compatibility.
Alternativas directas para MAX798ESE — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
No hay alternativas directas disponibles para este producto.
Solicitar alternativasMAX798ESE Valores máximos y características eléctricas
| Product Type | Synchronous step-down DC-DC controller |
| Controller Topology | Current-mode buck controller with synchronous rectification |
| Rango de tensión de entrada | 4.5 V to 30 V |
| Rango de tensión de salida | 1.6 V to 6 V |
| Corriente de salida máxima | 10 A |
| Maximum Switching Frequency | 330 kHz |
| Peak Conversion Efficiency | 96% |
| Número de salidas | 1 |
| Configuración de salida | Positive, adjustable |
| Rango de temperatura de funcionamiento | -40 °C to +85 °C |
| Temperature Grade | Industrial |
| Encapsulado | 16-pin SOIC |
| Package Code | PDSO16 / NSOIC-16 |
| Tipo de montaje | Surface mount |
| Application Category | CPU power conversion |
| Rectification Method | Synchronous |
| Estado RoHS | Compliant |
| REACH Status | unknown |
| AEC-Q100 Qualification | Not qualified |
| Lead-Free Status | unknown |
| Halogen-Free Status | unknown |
| Conflict-Minerals Status | unknown |
Guía de configuración de pines de MAX798ESE pdso16 / nsoic-16
Configuración de pines para MAX798ESE (encapsulado pdso16 / nsoic-16). Este dispositivo de potencia presenta terminales de puerta, drenador y fuente. Para encapsulados no polarizados, consulte la hoja de datos del fabricante para conocer la orientación exacta del pin 1 y los detalles del footprint. Las aplicaciones habituales incluyen el diseño de fuentes de alimentación, el accionamiento de motores y la conmutación de cargas.
No hay datos detallados de patillaje disponibles para MAX798ESE.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
MAX798ESE es adecuado para 6 aplicacións: Notebook and Portable CPU Rails, Battery-Powered Embedded Systems, Industrial Handheld Equipment, Portable Test and Measurement Instruments, Embedded Processor Power Conversion, High-Efficiency 24 V Industrial Rail Conversion.
Notebook and Portable CPU Rails
The MAX798ESE fits portable processor supplies that require a 1.6 V to 6 V rail from a 4.5 V to 30 V source. Its current-mode synchronous architecture reaches up to 96% efficiency, reducing conversion loss in battery-operated notebook and portable-computer systems. The controller operates beside external high-side and synchronous-rectifier MOSFETs, an inductor, and output capacitors. Designers should optimize the compensation and MOSFET selection for the processor's transient current while keeping the 10 A capability as a design limit rather than an unconditional operating target.
Recomendado
Battery-Powered Embedded Systems
The MAX798ESE is appropriate for embedded equipment that derives a low-voltage processor rail from a multi-cell battery or other 4.5 V to 30 V source. Its synchronous-rectification topology improves efficiency by reducing conduction loss relative to a non-synchronous diode arrangement, with the MAX798 family reaching up to 96% efficiency. The converter still requires careful selection of external MOSFETs and magnetics. Account for battery chemistry, minimum input voltage, converter startup behavior, and the difference between average and peak processor current when sizing the inductor and capacitors.
Recomendado
Industrial Handheld Equipment
The MAX798ESE supports industrial handheld systems where battery life, converter efficiency, and a compact surface-mount implementation are important. Its 4.5 V to 30 V operating range accommodates varied power-system conditions, while the adjustable 1.6 V to 6 V output supports multiple embedded-controller and processor voltages. The 16-pin SOIC package is practical for established surface-mount PCB processes. Industrial temperature-grade operation and an industrial control environment should be verified against the exact ordering code, while the converter layout must minimize switching-node area and maintain a low-impedance power-ground path.
Recomendado
Portable Test and Measurement Instruments
The MAX798ESE can generate an efficient low-voltage rail for processor-based measurement equipment that operates from a battery or external adapter. The controller's 1.6 V to 6 V output range and up-to-10 A architecture suit mixed digital and analog systems requiring several amps from a compact converter. Although the controller does not provide low-noise linear regulation, its 96% maximum family efficiency helps preserve battery runtime. Use separate filtering for sensitive analog sections, and validate the switching layout and measured spectrum rather than assuming a CPU rail is automatically suitable for precision analog measurements.
Recomendado
Embedded Processor Power Conversion
The MAX798ESE is suited to embedded processors that operate from a regulated rail in the 1.6 V to 6 V range and require load currents within the 10 A design envelope. Its current-mode, 330 kHz maximum-frequency architecture provides a conventional platform for compensation and external-component selection. The synchronous arrangement reduces diode loss, while the controller handles the high-side and low-side switching sequence. Confirm the processor's allowable voltage tolerance, maximum transient current, startup requirements, and state sequencing before finalizing the feedback divider, output capacitance, and power-stage layout.
Recomendado
High-Efficiency 24 V Industrial Rail Conversion
The MAX798ESE can step a nominal 24 V industrial supply down to a low-voltage logic or processor rail because its documented input range extends to 30 V. The synchronous controller and up-to-96% efficiency are advantageous where heat must be removed from a compact assembly. External MOSFETs must have suitable drain-voltage ratings, and the inductor must tolerate the specified ripple current. Keep the high-current switching loop small, provide robust input bypassing, and evaluate the thermal performance of MOSFETs, inductor, and PCB copper at the maximum intended load.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para MAX798ESE — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto |
|---|---|
| Brand | Maxim Integrated |
| Package | 16-pin SOIC |
| Product Type | Synchronous step-down DC-DC controller |
| Input Voltage Range | 4.5 V to 30 V |
| Output Voltage Range | 1.6 V to 6 V |
| Maximum Output Current | 10 A |
| Maximum Switching Frequency | 330 kHz |
| Peak Efficiency | 96% |
| Control Method | Current mode |
| Rectification | Synchronous |
Diferenciadores clave
- CPU-oriented synchronous control (frente a MAX797ESE)
- High-current CPU-power capability (frente a MAX793TESE+T)
- Documented 30 V synchronous-buck platform (frente a MAX798ESE+)
Notas de diseño
Keep the high-current loop between the controller, high-side MOSFET, synchronous-rectifier MOSFET, and input capacitor as compact as possible. Route the switch node over a small board area and away from feedback and gate-drive traces. Use a dedicated, low-impedance power-ground path for the switching stage and join it to the controller ground according to the manufacturer layout guidance.
Do not treat the controller's 10 A capability as an independent thermal rating for the finished converter. Estimate MOSFET conduction loss from resistance, inductor copper loss from ripple current, and switching loss from voltage, current, and transition time. Check each component's temperature rise and the board's copper area because the 16-pin SOIC package does not eliminate the need for power-stage thermal design.
Verify that external MOSFET drain ratings, inductor saturation current, and capacitor voltage ratings cover the 30 V maximum input with appropriate design margin. Avoid confusing the MAX798ESE ordering suffix with an electrical option: use the manufacturer pin table, temperature grade, and marking information. Do not substitute MAX797ESE or MAX793TESE+T without checking pinout, control architecture, and compensation requirements.
The MAX798ESE is a controller and therefore requires external switching and filtering components. Select the high-side and synchronous MOSFETs, inductor, input capacitors, output capacitors, and feedback network as one power-stage design. Validate startup, maximum load, transient response, current limit, and efficiency together rather than optimizing the feedback divider independently of converter dynamics.
Información de cumplimiento
The available MAX798 comparison information identifies RoHS compliance. The industrial temperature grade is not equivalent to AEC-Q100 qualification. REACH, lead-free, halogen-free, and conflict-minerals declarations require confirmation from the current manufacturer product documentation or declaration.
