EG44273 Overview
The EG Micro EG44273 is a single-channel high-speed low-side gate driver engineered to deliver precise, low-latency gate switching of MOSFET and IGBT power devices in switching power supply, motor control, and battery-powered applications. The EG44273 provides symmetric 2A peak source and sink output current with rail-to-rail output swing, ensuring full voltage excursion from ground to VCC on every switching transition — maximising gate overdrive during turn-on and minimising residual gate voltage during turn-off. EG Micro has designed the EG44273 with a short input-to-output propagation delay and a fast fall time (TF) of 20ns, enabling clean, precise turn-off transitions that reduce switching losses in high-frequency power stages.
A key differentiator of the EG44273 is its sub-1µA quiescent current — an exceptional figure for a 2A-class gate driver that makes it uniquely well-suited to battery-powered and energy-harvesting applications where standby power consumption is a primary design constraint. Despite this ultra-low quiescent draw, the device maintains full peak drive capability from a supply range of 4V to 20V, covering standard gate drive rails from 5V logic supplies through to 12V and 15V MOSFET/IGBT drive voltages. An important safety feature is the output-low default state when the input pin is floating — the EG44273 holds the gate drive output low in the absence of a valid input signal, preventing unintended power switch turn-on under open-circuit input fault conditions.
The EG44273 requires minimal external components — typically just bypass capacitors — simplifying PCB layout and reducing BOM cost in compact designs. It is housed in the industry-standard SOT-23-5 package, footprint-compatible with widely deployed single-channel low-side gate drivers from TI, Microchip, and Diodes Inc. EG Micro manufactures the EG44273 as a lead-free, RoHS-compliant product. ABL Semi distributes it as a 100% authentic, original factory device with flexible MOQ and compliance documentation for UK and European customers.
Key Specifications
| Parameter | Value |
|---|---|
| Device Type | Single-Channel High-Speed Low-Side Gate Driver |
| Supply Voltage (VCC) | 4V to 20V |
| Peak Source Output Current (IOH) | 2A |
| Peak Sink Output Current (IOL) | 2A |
| Rise Time (TR) | 40ns |
| Fall Time (TF) | 20ns |
| Quiescent Current (Iq) | <1µA |
| Output Default State (Floating Input) | Output held LOW |
| Output Type | Rail-to-rail |
| Propagation Delay | Short (see datasheet) |
| External Components Required | Minimal (bypass capacitors only) |
| Package | SOT-23-5 |
| Compliance | RoHS compliant, lead-free |
Applications
The EG44273 is designed for single-channel low-side gate drive in switching power conversion and motor control applications, with particular suitability for systems where standby power consumption must be minimised. Primary application areas include synchronous buck and boost DC-DC converters, battery management system FET drivers, wireless power transmitters, IoT device power stages, and portable power tool motor drivers. The device is equally well-suited to low-power inverters, solar energy harvesting converters, and wearable device power management circuits, where its sub-1µA quiescent current, wide 4V–20V supply range, and SOT-23-5 footprint deliver an efficient, space-saving gate drive solution with minimal impact on system standby power.
Pin-to-Pin Compatible Alternatives
The EG44273’s SOT-23-5 package and single-channel low-side architecture are shared with widely deployed gate driver ICs from leading Western suppliers, enabling a direct footprint substitution to reduce BOM cost and provide multi-source supply continuity without any PCB layout changes.
| Reference Part Number | Original Manufacturer | Why Choose EG44273 |
|---|---|---|
| UCC27517DBVR | Texas Instruments | Single-channel 4A low-side gate driver in SOT-23-5; EG44273 provides a lower-current 2A alternative with sub-1µA quiescent current — a significant advantage in battery-powered or energy-sensitive designs where the TI device’s higher Iq is a drawback |
| MCP1416T-E/OT | Microchip | Single-channel 1.5A gate driver in SOT-23-5; EG44273 delivers higher 2A symmetric peak drive and a wider 4V–20V supply range, with an output-low failsafe on floating input not present in the Microchip device |
| TC4420AVOA | Microchip (Telcom) | Single-channel 6A MOSFET driver in SOT-23; EG44273 provides a compact 2A alternative for lower gate charge devices, with dramatically lower quiescent current for energy-critical applications |
| ZXGD3009E6TA | Diodes Inc. | Single N-channel gate driver in SOT-23-6; EG44273 offers equivalent low-side drive functionality in the more compact 5-pin SOT-23-5 footprint with the added benefit of sub-1µA quiescent draw |
| IXD_604YVTR | IXYS (Littelfuse) | 4A single-channel gate driver in SOT-23; EG44273 provides a cost-effective 2A alternative with ultra-low quiescent current and a floating-input failsafe output, better suited to battery and IoT power stages |
Frequently Asked Questions
Is EG44273 RoHS compliant?
Yes. The EG44273 is fully RoHS compliant and lead-free. EG Micro manufactures the EG44273 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 EG44273?
The EG44273 is a footprint-compatible alternative to several widely used single-channel low-side gate drivers in SOT-23-5, including the Texas Instruments UCC27517DBVR, Microchip MCP1416T-E/OT, Diodes Inc. ZXGD3009E6TA, and IXYS IXD_604YVTR — each sharing the same package and single-channel non-inverting gate drive architecture. Refer to the compatibility table above for a detailed comparison.
What is the minimum order quantity (MOQ) for EG44273?
ABL Semi offers flexible MOQ for EG44273, supporting both prototype quantities and mass production orders. Contact us for current stock and pricing.
What package options are available for EG44273?
The EG44273 is available in the SOT-23-5 (5-pin small outline transistor) surface-mount package. This is the most compact standard footprint for single-channel gate drivers, widely used in space-constrained power conversion PCB designs. The SOT-23-5 pinout is compatible with equivalent devices from Texas Instruments, Microchip, and Diodes Inc., supporting direct board-level substitution. Contact ABL Semi to confirm current stock availability.
Is the EG44273 suitable for use in battery-powered devices, and how low is its standby power draw?
Yes — the EG44273 is specifically well-suited to battery-powered applications. Its quiescent current is rated at below 1µA, which is exceptionally low for a 2A peak drive gate driver. To put this in practical terms, a single 100mAh AA cell could theoretically supply the EG44273’s quiescent current alone for over 100,000 hours — meaning the gate driver itself contributes negligibly to battery self-discharge in the absence of switching activity. This makes the EG44273 an ideal choice for IoT sensor nodes, portable instruments, wireless power devices, and other battery-powered systems where the power converter must spend significant time in sleep or low-activity modes, and where every microamp of standby draw directly affects battery run time and shelf life.
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