SLM27211 Overview
The Sillumin SLM27211 is a high-frequency half-bridge N-channel MOSFET gate driver IC featuring independently controlled high-side and low-side driver channels with an integrated 120V bootstrap diode. Unlike gate drivers that share a common input or require external bootstrap diodes, the SLM27211 provides separate inputs for the high-side and low-side drivers, giving power supply and motor drive designers maximum flexibility to implement any PWM switching scheme — including asymmetric duty cycles, phase-shifted control, and active clamp transitions — without constraint from a fixed input logic structure. The integrated bootstrap diode eliminates a discrete external component, simplifying the bill of materials and reducing PCB area in space-constrained designs.
Sillumin has engineered the SLM27211 for high-frequency switching performance, with a peak source current of 4.5A and peak sink current of 3A (IOL), enabling fast, low-loss gate charging and discharging of power MOSFETs in demanding converter topologies. Rise and fall times of 7ns and 5ns respectively, with high-side and low-side channel timing matched to within 2ns, ensure that switching transitions are consistent and predictable across both legs of the half-bridge — a critical requirement for achieving low EMI and avoiding timing-induced shoot-through in full-bridge and two-switch forward designs. The device operates from a VDD supply of 8V to 17V and accepts input logic low levels of 1.3V to 1.9V, confirming compatibility with 1.8V, 3.3V, and 5V digital control platforms.
Both the high-side and low-side drivers incorporate independent undervoltage lockout (UVLO) that forces outputs low if the respective drive voltage falls below the safe threshold — preventing under-driven gate conditions that could lead to MOSFET latch-up or shoot-through during supply ramp events. The SLM27211 is available in four package variants — SOP-8, SOP8-EP, DFN4x4-8, and DFN4x4-10 — accommodating a wide range of PCB layout and thermal management requirements. ABL Semi stocks the SLM27211 as a fully authentic, original Sillumin factory product with flexible MOQ and compliance documentation, serving UK and European engineers as a cost-effective, pin-to-pin alternative to TI UCC27211 and Infineon IR2110 series gate drivers.
Key Specifications
| Parameter | Value |
|---|---|
| Device Type | Half-Bridge N-Channel MOSFET Gate Driver |
| Supply Voltage (VDD) | 8V to 17V |
| Bootstrap Diode Voltage Rating | 120V (integrated on-chip) |
| Peak Source Output Current | 4.5A |
| Peak Sink Output Current (IOL) | 3A |
| Rise Time (Tr) | 7ns |
| Fall Time (Tf) | 5ns |
| Channel Timing Match | 2ns (high-side vs low-side) |
| Input Logic Level — Low | 1.3V to 1.9V |
| Input Logic Compatibility | 1.8V, 3.3V, and 5V compatible |
| Driver Control | Independent high-side and low-side inputs |
| UVLO Protection | Independent on both high-side and low-side |
| Package Options | SOP-8, SOP8-EP, DFN4x4-8, DFN4x4-10 |
Applications
The SLM27211 is suited to high-frequency DC-DC converter and motor drive topologies requiring independent, precisely timed high-side and low-side gate drive with an integrated bootstrap supply. Primary application areas include half-bridge and full-bridge DC-DC converters, two-switch forward converters, active clamp forward converters, synchronous buck converters, and resonant LLC converters. The device is equally applicable in BLDC motor half-bridge power stages, server power supply units, and telecom DC-DC modules, where its 2ns channel matching, fast 5–7ns switching times, and integrated bootstrap diode deliver high efficiency and reduced component count in compact PCB designs.
Pin-to-Pin Compatible Alternatives
The SLM27211’s SOP-8 and DFN4×4 packages and independent dual-input half-bridge architecture are shared with several established Western gate driver ICs, allowing designers to adopt the SLM27211 as a direct cost-competitive footprint replacement without PCB or firmware modifications.
| Reference Part Number | Original Manufacturer | Why Choose SLM27211 |
|---|---|---|
| UCC27211 | Texas Instruments | Industry-standard 120V half-bridge gate driver in SOP-8; SLM27211 is a pin-compatible replacement with equivalent 4A+ drive capability, integrated bootstrap diode, and lower procurement cost from ABL Semi |
| IR2110 | Infineon (International Rectifier) | Classic high/low-side gate driver widely used in half-bridge stages; SLM27211 offers faster 7ns/5ns switching times and a more compact DFN4×4 package option for higher-density designs |
| IR2113 | Infineon (International Rectifier) | 600V half-bridge driver in DIP/SOIC; SLM27211 provides equivalent independent dual-input control with on-chip bootstrap diode and tighter 2ns channel matching for improved switching symmetry |
| NCP5106 | onsemi | Half-bridge gate driver in SOIC-8; SLM27211 delivers higher peak sink current (3A vs 0.5A) and faster edge rates, reducing MOSFET switching losses at high frequencies |
| FAN7382 | onsemi (Fairchild) | High/low-side gate driver in SOP-8; SLM27211 replaces it with a fully pin-compatible device offering integrated bootstrap diode, 2ns-matched channels, and multi-package availability including DFN4×4 |
Frequently Asked Questions
Is SLM27211 RoHS compliant?
Yes. The SLM27211 is fully RoHS compliant. Sillumin manufactures the SLM27211 in accordance with EU RoHS Directive 2011/65/EU, ensuring the device is free from restricted hazardous substances including lead and mercury. ABL Semi can provide full compliance and trade documentation upon request to support UK and European regulatory and procurement requirements.
What are the pin-to-pin replacements for SLM27211?
The SLM27211 is a direct pin-compatible alternative to widely deployed half-bridge gate drivers including the Texas Instruments UCC27211, Infineon IR2110 and IR2113, onsemi NCP5106, and onsemi FAN7382 — all sharing a compatible SOP-8 footprint and independent dual-input control architecture. Refer to the compatibility table above for a full technical and sourcing comparison.
What is the minimum order quantity (MOQ) for SLM27211?
ABL Semi offers flexible MOQ for SLM27211, supporting both prototype quantities and mass production orders. Contact us for current stock and pricing.
What package options are available for SLM27211?
The SLM27211 is available in four package options: SOP-8 (standard small outline 8-pin), SOP8-EP (SOP-8 with exposed thermal pad for enhanced heat dissipation), DFN4×4-8 (8-pin quad flat no-lead, 4mm × 4mm), and DFN4×4-10 (10-pin quad flat no-lead, 4mm × 4mm). The SOP-8 and SOP8-EP variants offer direct footprint compatibility with established half-bridge gate drivers such as the UCC27211 and IR2110, while the DFN4×4 variants provide a more compact footprint with lower package inductance for high-frequency, high-density PCB designs. Contact ABL Semi to confirm current stock availability for your preferred package variant.
Does the SLM27211’s integrated bootstrap diode support all switching frequencies?
The SLM27211 integrates an on-chip 120V bootstrap diode that charges the high-side floating supply capacitor during each low-side conduction interval, eliminating the need for an external discrete bootstrap diode. This integrated diode is suitable for the vast majority of half-bridge switching applications operating at frequencies from a few kHz up to several hundred kHz, covering synchronous buck, LLC resonant, two-switch forward, and active clamp topologies. For very high duty cycle or 100% duty cycle operation, where the low-side switch may not conduct long enough to adequately recharge the bootstrap capacitor, additional design considerations — such as a charge pump or minimum off-time constraint in firmware — may be required. Designers should consult the SLM27211 datasheet for bootstrap capacitor sizing guidelines specific to their switching frequency and gate charge requirements.
For complete product specifications, please refer to: