MAX798ESE - 30V 10A Synchronous Buck Controller | Maxim
料号： MAX798ESE ✓ 量产中MAX798ESE 概述
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.
直接替换替代料： MAX798ESE ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
该产品暂无直接替换替代料。
请求替代料MAX798ESE 最大额定值与电气特性
| Product Type | Synchronous step-down DC-DC controller |
| Controller Topology | Current-mode buck controller with synchronous rectification |
| 输入电压范围 | 4.5 V to 30 V |
| 输出电压范围 | 1.6 V to 6 V |
| 最大输出电流 | 10 A |
| Maximum Switching Frequency | 330 kHz |
| Peak Conversion Efficiency | 96% |
| 输出数量 | 1 |
| 输出配置 | Positive, adjustable |
| 工作温度范围 | -40 °C to +85 °C |
| Temperature Grade | Industrial |
| 封装 | 16-pin SOIC |
| Package Code | PDSO16 / NSOIC-16 |
| 安装类型 | Surface mount |
| Application Category | CPU power conversion |
| Rectification Method | Synchronous |
| RoHS 状态 | Compliant |
| REACH Status | unknown |
| AEC-Q100 Qualification | Not qualified |
| Lead-Free Status | unknown |
| Halogen-Free Status | unknown |
| Conflict-Minerals Status | unknown |
MAX798ESE pdso16 / nsoic-16 引脚配置指南
MAX798ESE（pdso16 / nsoic-16 封装）的引脚配置。 该功率器件具有栅极、漏极和源极端子。对于无极性封装，请参阅制造商数据手册以了解确切的引脚 1 方向和封装尺寸细节。常见应用包括电源设计、电机驱动和负载开关。
暂无详细引脚数据： MAX798ESE.
请参阅 数据手册 以查看完整引脚配置。
典型应用
MAX798ESE 适用于 6 应用s: 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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
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推荐产品汇总
工程参考数据： MAX798ESE ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 |
|---|---|
| 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 |
关键差异点
- CPU-oriented synchronous control （对比 MAX797ESE)
- High-current CPU-power capability （对比 MAX793TESE+T)
- Documented 30 V synchronous-buck platform （对比 MAX798ESE+)
设计说明
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.
合规信息
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.
