ISL99125B - 25A DrMOS Power Module | Renesas
MPN: ISL99125B ✓ Active| Qty | Unit Price | Extended |
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| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
ISL99125B Overview
A DrMOS module is an intelligent power semiconductor stage that combines a MOSFET power stage with its driver. In a synchronous buck or similar converter, the module switches the input rail into a controlled energy-transfer path while its internal driver supplies gate-drive voltage and timing. Diode emulation allows the low-side conduction behavior to be controlled to reduce reverse-recovery effects and improve conversion efficiency. This integration can shorten the critical power loop and make compact converter designs more practical than discrete driver-plus-MOSFET implementations.
The ISL99125B family description highlights high-performance DrMOS operation for high-density DC/DC converters. The verified product-page snippet does not provide complete electrical tables, switching-frequency limits, voltage ratings, thermal-resistance values, or monitor accuracy, so those parameters are not inferred here. Engineers should use the official Renesas datasheet for exact limits, recommended operating conditions, pin functions, exposed-pad requirements, and application-specific derating.
Typical uses include CPU and GPU point-of-load converters, server power rails, telecom and networking equipment, high-current industrial modules, notebook power systems, and other compact synchronous converters. The module is especially relevant when the PCB area available for discrete MOSFETs is limited and the converter requires high switching performance. The integrated current and temperature-monitor feature described in the verified results can support system telemetry, protection, and power management when configured according to the datasheet.
For layout, place power connections and decoupling according to the Renesas datasheet and keep the high-current loop as compact as practical. Validate junction temperature, current capability, gate-drive settings, dead time, switching-node overshoot, and output ripple in the final converter rather than relying on nominal current ratings alone. The package also requires attention to exposed-pad soldering and thermal via or copper design for repeatable performance.
This page combines the verified Renesas product description, manufacturer datasheet link, distributor package identification, and cross-reference research. It is intended to help engineers locate the correct documentation and understand the module class without filling missing electrical values with assumptions.
Drop-in alternatives for ISL99125B — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with ISL99125B (same form factor and footprint) — differing in Package, Rated Current.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
No drop-in alternatives available for this product.
Request AlternativesISL99125B Maximum Ratings & Electrical Characteristics
| Product Type | DrMOS power module |
| Rated Current | 25 A |
| Family Description | 25A/35A DrMOS module |
| Power Stage | Integrated high-side and low-side MOSFETs |
| Driver | Integrated high-performance FET driver |
| Diode Emulation | Supported |
| Power Conversion | High-frequency DC/DC conversion |
| Current Monitor | Integrated high-accuracy current monitor |
| Temperature Monitor | Integrated temperature monitor |
| Package | 24-QFN |
| Package Dimensions | 3.5 mm x 5 mm |
| Mounting Type | Surface Mount |
| Power Module Topology | Synchronous switching power stage |
| Application Class | High-density DC/DC converters |
| Manufacturer Document | ISL99125B, ISL99135B datasheet |
| Document File Size | 520 Kbytes |
| Document Page Count | 13 pages |
ISL99125B 3.5 mm x 5 mm Pin Configuration Guide
Pin configuration for ISL99125B (3.5 mm x 5 mm package). This power device features gate, drain, and source terminals. For non-polarized packages, refer to the manufacturer datasheet for exact pin 1 orientation and footprint details. Common applications include power supply design, motor driving, and load switching.
No detailed pinout data available for ISL99125B.
Refer to the datasheet for full pin configuration.
Typical Applications
ISL99125B is suitable for 6 applications: CPU and GPU Point-of-Load Converters, Server and Networking Power Rails, High-Current Industrial DC/DC Modules, Notebook and Portable Computing Power, Telecom and RF-System Power Conversion, Telemetric and Adaptive Power Control.
CPU and GPU Point-of-Load Converters
The ISL99125B fits compact point-of-load converters where the power stage must deliver high current while minimizing PCB area. Its verified 25A/35A DrMOS family positioning and integrated driver/MOSFET architecture can reduce the number of discrete power components near the controller. The design should use the Renesas recommended layout, validate switching-node behavior, and derate current for package temperature and copper cooling.
Recommended
Server and Networking Power Rails
High-density server, switch, and networking power systems can use the ISL99125B as a synchronous DC/DC power stage. The module combines MOSFETs and driver circuitry in a 3.5 mm by 5 mm 24-QFN package, which supports compact converter layouts. Integrated current and temperature monitoring may assist telemetry and protection, although exact monitor limits and threshold behavior must be obtained from the official datasheet.
Recommended
High-Current Industrial DC/DC Modules
The ISL99125B is relevant to industrial power modules that require a compact, integrated switching stage for high-frequency conversion. Its DrMOS architecture can reduce external driver and MOSFET count, while the verified 25A/35A family rating provides a basis for initial power-stage selection. Industrial designs must still verify voltage limits, ambient temperature, isolation, protection, and thermal performance in the finished enclosure.
Recommended
Notebook and Portable Computing Power
A notebook power converter can benefit from the ISL99125B when board area is constrained and the converter requires a local synchronous power stage. The integrated driver and MOSFET arrangement can simplify routing compared with a discrete implementation. Designers should account for transient load response, inductor selection, switching-node losses, exposed-pad soldering, and the module's exact current and thermal limits from the datasheet.
Recommended
Telecom and RF-System Power Conversion
Telecom equipment and RF-system power rails often require efficient, compact DC/DC stages with careful attention to switching noise and layout. The ISL99125B's integrated DrMOS package can support high-frequency converter designs, while current and temperature monitoring can contribute to system supervision. RF-adjacent designs should minimize high-current loop area, control switch-node dv/dt, and validate conducted and radiated EMI in the final system.
Recommended
Telemetric and Adaptive Power Control
The verified ISL99125B description includes integrated high-accuracy current and temperature monitors, making the module relevant to telemetry and adaptive power-control designs. Those monitor functions can feed a controller or system supervisor when the electrical characteristics and calibration requirements are understood. They should not replace independent protection; designers still need overcurrent, undervoltage, overvoltage, and thermal safeguards appropriate to the converter.
Recommended
Engineering reference data for ISL99125B — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ISL99135B |
|---|---|---|
| Product Type | 25A/35A DrMOS power module | 25A/35A DrMOS power module |
| Brand | Renesas Electronics | Renesas Electronics |
| Integrated Driver | Yes | Yes |
| Integrated MOSFETs | Yes | Yes |
| Diode Emulation | Supported | Supported |
Key Differentiators
- Integrated DrMOS architecture (vs ISL99135B)
- Package integration (vs Discrete MOSFET plus driver solution)
- Monitoring capability (vs Discrete MOSFET solution)
Design Notes
Use the Renesas datasheet layout as the authority for power-pin placement, exposed-pad treatment, input/output capacitors, and gate-related connections. Keep the high-current switching loop short and compact to reduce parasitic inductance and switching loss. Verify that the 3.5 mm by 5 mm 24-QFN package has adequate solder-joint formation and that the exposed pad is connected according to the recommended land pattern.
The verified data does not provide thermal resistance or safe-operating-area curves, so these must be obtained from the official datasheet before estimating allowed dissipation. In the finished PCB, provide substantial copper around the exposed pad, use the recommended thermal-via arrangement, and measure junction temperature under worst-case input voltage, switching frequency, load, and ambient conditions. Do not treat the 25A family rating as a guaranteed board-level continuous-current limit.
Validate converter startup, dead time, diode-emulation behavior, peak switch current, output ripple, and current-monitor calibration in the final control loop. Place input capacitors close to the power-stage connections and follow the datasheet's recommendations for output capacitance and loop compensation. Because exact voltage and frequency limits are not present in the supplied data, do not select the inductor, capacitors, or switching frequency from assumptions.
A family-related part such as ISL99135B is not automatically a drop-in replacement for ISL99125B. Confirm pin names, exposed-pad connections, voltage rating, switching limits, monitor behavior, thermal performance, and ordering code before substitution. Also confirm the manufacturer lifecycle status and current distributor inventory rather than relying on a generic search-result description.
Compliance Information
The supplied verified data does not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. These fields remain unknown.
