ISL6571CR - Synchronous Half-Bridge Driver | Intersil
MPN： ISL6571CR ✓ 啟用中ISL6571CR 概覽
A half-bridge driver is an integrated circuit that controls the high-side and low-side switches in a power-conversion stage. The ISL6571CR combines complementary MOSFET drive with synchronous half-bridge switching, placing it within the hierarchy of gate driver IC, power-management IC, and semiconductor. This integration reduces the number of discrete power-conversion components while supporting compact DC-DC converter designs.
The verified product information identifies the ISL6571CR as a full- or half-bridge driver and lists it under full, half-bridge H-bridge drivers. Its integrated function is intended for synchronous rectification, where a low-side conduction path improves power-converter efficiency relative to a design that relies only on a discrete Schottky rectification diode. Exact drive voltage, current, timing, and efficiency limits were not included in the supplied source data and therefore require confirmation from the manufacturer datasheet.
The architecture combines a complementary MOSFET driver with a synchronous half-bridge switch. This arrangement is suited to power converters in which the controller must coordinate high-side and low-side switching while driving external MOSFETs. Because the verified sources identify a 68-QFN package, board-level planning should account for exposed-pad layout, thermal management, and the creepage and clearance requirements appropriate to the intended operating voltages.
Typical application categories include synchronous buck regulators, point-of-load power modules, compact portable power systems, and industrial or communications equipment requiring efficient DC-DC conversion. The part may also be evaluated for broader converter topologies where complementary gate drive and synchronous rectification are useful, although the supplied web data does not identify named reference designs or specific companion-component bill-of-materials examples.
A key design consideration is confirming the complete electrical limits and layout requirements from the official datasheet before production release. Engineers should verify gate-drive voltage, sink and source current, dead time, bootstrap behavior, operating temperature, and exposed-pad construction rather than inferring them from the package type or product-class description.
This page consolidates the verified distributor listing, package information, functional description, and current pricing reference into an engineering-focused product record. It also distinguishes confirmed facts from unavailable parameters so designers can identify what must be checked in the manufacturer datasheet before making a drop-in or cross-reference decision.
直接替換替代品，適用於 ISL6571CR — 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ISL6571CR 最大額定值與電氣特性
| Product Type | Complementary MOSFET driver and synchronous half-bridge switch |
| Driver Configuration | Full- or half-bridge (H-bridge) driver |
| Switching Topology | Synchronous half-bridge |
| Rectification Method | Synchronous rectification |
| Power Stage Integration | Replaces 2 power MOSFETs, 1 Schottky diode, and 2 gate drivers |
| 封裝 | 68-QFN |
| Package Dimensions | 10 mm x 10 mm |
| 腳位數 | 68 pins |
| 安裝類型 | Surface mount |
ISL6571CR 10 mm x 10 mm 腳位配置指南
ISL6571CR（10 mm x 10 mm 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： ISL6571CR.
請參閱 資料表 以查看完整腳位配置。
典型應用
ISL6571CR 適用於 6 應用s: Synchronous Buck DC-DC Converter, Point-of-Load Power Module, Portable and Battery-Powered Electronics, Communications Power Rails, Industrial Control Power Supply, Compact Synchronous Power Converter.
Synchronous Buck DC-DC Converter
The ISL6571CR fits a synchronous rectified buck-converter stage because its complementary MOSFET driver and synchronous half-bridge switch are specifically intended for this topology. According to the manufacturer datasheet, the integrated approach replaces 2 power MOSFETs, 1 Schottky diode, 2 gate drivers, and associated control circuitry. The converter uses the half-bridge during each switching cycle to transfer energy through an inductor while using synchronous conduction instead of relying only on a discrete rectifier. The verified data does not provide input-voltage, output-voltage, current, or switching-frequency limits, so those values must be confirmed before selecting inductors, capacitors, or external MOSFETs.
Point-of-Load Power Module
A point-of-load module benefits from the ISL6571CR because combining complementary gate drive and synchronous half-bridge switching in a 68-QFN, 10 mm by 10 mm package can support compact power conversion around a processor, FPGA, or communications device. The manufacturer describes the part as a way to replace several separate power-stage devices with one integrated driver and switch solution. However, the 68-QFN footprint requires careful exposed-pad layout and thermal verification. Actual suitability depends on the intended rail voltage, load current, allowable dissipation, switching frequency, and the controller or converter architecture, none of which were specified in the supplied verified snippets.
Portable and Battery-Powered Electronics
The ISL6571CR can be evaluated for portable and battery-powered equipment that uses a compact synchronous buck stage. Its synchronous half-bridge function is relevant when designers want to reduce reliance on a discrete Schottky rectification path, while the complementary MOSFET drive supports coordinated high-side and low-side operation. The integrated 68-QFN device may help reduce the number of external power-path components. A qualified battery design must still establish efficiency across the complete input-voltage and load range, confirm transient response, and calculate junction temperature under worst-case conditions because those quantitative limits were not included in the supplied source information.
Communications Power Rails
The ISL6571CR is applicable to communications equipment requiring an efficient local DC-DC stage near a processor, transceiver, or network interface. The synchronous half-bridge architecture can support compact conversion and coordinated MOSFET switching, which is useful when board area is constrained. The verified manufacturer description establishes the device's complementary MOSFET driver and half-bridge switch functions but does not provide efficiency, output-current, or thermal data. Designers should therefore verify steady-state and transient behavior in the final topology, including input-bypass placement, gate-loop stability, switching-node layout, and thermal performance of the exposed pad.
Industrial Control Power Supply
Industrial control systems can use the ISL6571CR within a synchronous DC-DC stage intended to supply local control, sensing, or logic rails. The 68-QFN surface-mount package and integrated complementary-driver architecture can reduce discrete component count on space-constrained control boards. For industrial equipment, the designer must confirm operating-temperature limits, electrical stress ratings, failure behavior, and whether environmental qualification is appropriate for the installation. The verified source does not state industrial or automotive certification, so the part should not be treated as AEC-Q100 qualified without separate manufacturer evidence.
Compact Synchronous Power Converter
The ISL6571CR is suited to compact converter platforms where a half-bridge power stage must be integrated with a control system. The manufacturer explicitly presents the device as a new approach to synchronous rectified buck regulation, replacing multiple discrete elements. This architecture can streamline a repeated power module and make layout consistency easier across a product family. The tradeoff is that the exact voltage, current, dead-time, and thermal envelopes are not visible in the supplied search snippets. Before releasing multiple designs, engineers should establish those limits from the official datasheet and evaluate EMI, startup, fault response, and exposed-pad heat spreading.
工程參考資料，適用於 ISL6571CR — 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 |
|---|---|
| Package | 68-QFN (10 mm x 10 mm) |
| Brand | Intersil Corporation |
| Product Type | Complementary MOSFET driver and synchronous half-bridge switch |
| Primary Topology | Synchronous rectified buck switching regulator |
| Driver Classification | Full- or half-bridge (H-bridge) driver |
| Discrete Replacement Claim | Replaces 2 power MOSFETs, 1 Schottky diode, 2 gate drivers, and associated control circuitry |
| Verified Unit Price | $1.61 as of 2026-10-28 |
| Reported Inventory | 22,050 units at one distributor as of 2026-10-28 |
主要差異化特點
- Integrated complementary drive and synchronous switching (對比Discrete MOSFET, Schottky diode, and two-gate-driver implementation)
- Purpose-built synchronous buck power-stage integration (對比Generic H-bridge driver without an integrated synchronous switch)
- Compact 10 mm by 10 mm surface-mount implementation (對比Discrete or separately packaged half-bridge power stage)
設計說明
The ISL6571CR uses a 68-QFN package measuring 10 mm by 10 mm, and the verified sources do not confirm the exposed-pad connection or thermal resistance. Before power-loss calculations, inspect the official land pattern and determine whether the pad is an electrical node or thermal-only connection. Use the datasheet junction-temperature and package limits to estimate dissipation, and provide uninterrupted copper and a thermal plane where the construction permits it.
Treat the high-side switch node as a fast-changing and potentially high-voltage EMI source. Keep the ISL6571CR, external MOSFETs, and switching connections compact, route the high-current gate and power paths with short and wide traces, and provide local input and bootstrap capacitance exactly as directed by the manufacturer layout. Do not derive a 68-QFN footprint from pin count alone; verify pad dimensions, pin-1 orientation, exposed-pad geometry, and solder-mask clearances.
Do not select a replacement from generic half-bridge-driver search results. A valid drop-in candidate must match the 68-QFN footprint, exposed-pad construction, supply range, gate-drive levels, source and sink current, switching timing, and protection behavior. The supplied cross-reference results named no verified substitute, and the ISL6540 is not presented as a confirmed replacement. Confirm the ordered-device revision and all electrical limits from the official datasheet before redesign or substitution.
Synchronous half-bridge layouts require careful separation of the sensitive gate and feedback paths from the high-dV/dt switch node. Use the manufacturer's recommended high-current and gate-loop geometry, keep the controller feedback connection away from the switching node, and validate common-mode and radiated-emissions performance after layout. The supplied data does not identify a named reference design, so the official application guidance and schematic should remain the controlling documents.
合規資訊
The supplied verified snippets do not explicitly state RoHS, REACH, lead-free, halogen-free, conflict-minerals, or automotive-qualification status. AEC-Q100 is marked not_applicable because the available information does not identify an automotive-qualified variant.
