MAX798ESE - 30V 10A Synchronous Buck Controller | Maxim
MPN： MAX798ESE ✓ 啟用中MAX798ESE 概覽
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.
直接替換替代品，適用於 MAX798ESE — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此產品無可直接替換的替代品。
申請替代品MAX798ESE 最大額定值與電氣特性
| Product Type | Synchronous step-down DC-DC controller |
| Controller Topology | Current-mode buck controller with synchronous rectification |
| 輸入電壓範圍 | 4.5 V to 30 V |
| 輸出電壓範圍 | 1.6 V to 6 V |
| 最大輸出電流 | 10 A |
| Maximum Switching Frequency | 330 kHz |
| Peak Conversion Efficiency | 96% |
| 輸出數量 | 1 |
| 輸出配置 | Positive, adjustable |
| 工作溫度範圍 | -40 °C to +85 °C |
| Temperature Grade | Industrial |
| 封裝 | 16-pin SOIC |
| Package Code | PDSO16 / NSOIC-16 |
| 安裝類型 | Surface mount |
| Application Category | CPU power conversion |
| Rectification Method | Synchronous |
| RoHS 狀態 | 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 腳位配置指南
MAX798ESE（pdso16 / nsoic-16 封裝）的腳位配置。 此功率元件具有閘極、汲極與源極端子。對於非極性封裝，請參閱製造商資料表以取得確切的第 1 腳方向與佈局詳細資訊。常見應用包括電源設計、馬達驅動與負載切換。
無詳細腳位定義資料： MAX798ESE.
請參閱 資料表 以查看完整腳位配置。
典型應用
MAX798ESE 適用於 6 應用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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
推薦產品摘要
工程參考資料，適用於 MAX798ESE — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 |
|---|---|
| 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 |
主要差異化特點
- CPU-oriented synchronous control (對比MAX797ESE)
- High-current CPU-power capability (對比MAX793TESE+T)
- Documented 30 V synchronous-buck platform (對比MAX798ESE+)
設計說明
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.
合規資訊
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.
