The AWK6809 is a high-performance synchronous step-down voltage regulator that serves as a direct replacement for the LT8609.

In automotive electronics, industrial control, and low-power IoT applications—where demands for power efficiency, reliability, and long-term supply stability are increasingly stringent—the ADI LT8609 synchronous step-down voltage regulator was previously a widely adopted industry-standard solution. However, facing intensified supply chain uncertainty, stricter EMI regulations, and the continuous need for end-product energy efficiency and cost optimization, engineers urgently require a domestic LT8609 alternative that can not only seamlessly fit into existing designs but also deliver substantial performance and economic benefits.

AnalogWin's AWK6809 synchronous step-down voltage regulator achieves comprehensive upgrades in core advantages such as power consumption, EMI suppression, system reliability, and overall cost, all while maintaining complete compatibility with the LT8609 in terms of pinout, package, peripheral circuitry, and electrical parameters. Whether you are in the product mass production maintenance phase or at the early stages of new platform development, the AWK6809 is your optimal choice for a smooth migration from the LT8609.

I. Seamless Replacement: No Design Changes Required

The core advantage of the AWK6809 lies in its "zero-barrier switch"—existing LT8609-based designs can be directly replaced without the need for functional re-verification, PCB modifications, or changes to peripheral components.

1. Key Electrical Parameters are Fully Consistent

The AWK6809 strictly aligns with the LT8609 on all core operating parameters, ensuring unchanged system behavior:

l Input Voltage Range: 3.0V to 42V

l Maximum Continuous Output Current: 3A

l Switching Frequency Range: 200kHz to 2.2MHz (supports external synchronization)

l Minimum On-Time: 45ns (typical)

l Operating Junction Temperature Range: -40°C to +150°C

This parameter consistency allows the AWK6809 to perfectly adapt to original application scenarios such as automotive 12V/24V power supplies, industrial equipment power, and battery-powered IoT nodes, eliminating the need to adjust the power architecture or reevaluate the load.

2. 1:1 Package and Pin Compatibility

The AWK6809 uses the exact same DFN10 3x3mm package as the LT8609, with identical positioning for all signal pins, power, and ground pad layouts. The bottom thermal pad is also connected to GND, requiring no adjustment to thermal management design. This means existing PCBs can be used directly with the AWK6809, saving the time and cost of board respins.

3. Peripheral Circuitry is Fully Reusable

Peripheral component types such as feedback network resistors, output filter capacitors, frequency-setting resistors, and power inductors can all be retained. The Bill of Materials (BOM) requires almost no changes, significantly shortening the component switching cycle and avoiding the secondary certification risks and inventory pressures associated with part changes.

4. Comprehensive Application Coverage

The AWK6809 is AEC-Q100 Grade 1 certified and suitable for:

l Automotive Electronics: T-Box, cameras, Body Control Modules (BCM), ADAS sensor power.

l Industrial Control: PLCs, motor drives, remote I/O modules.

l Low-Power IoT: GPS trackers, LoRa/NB-IoT terminals, wireless sensor nodes.

l Communication Modules: GSM/LTE dynamic load power supply.

Whether for new design implementation or legacy product iteration, the AWK6809 can seamlessly take over all applications of the LT8609.

II. Four Key Upgrades Beyond Compatibility

While ensuring compatibility, the AWK6809 is deeply optimized to address the practical pain points of LT8609 applications, achieving an upgrade upon replacement.

1. Lower Quiescent Current, Significantly Extends Battery Life

The AWK6809 features a typical input quiescent current as low as 2.5µA in Burst Mode, with a shutdown current below 1µA. Compared to the LT8609's actual power consumption performance under light load, the AWK6809 further reduces standby energy consumption. For devices relying on long-term battery operation, such as asset trackers and environmental monitoring sensors, this effectively extends battery life and reduces on-site maintenance frequency.

2. Full Series Features Spread Spectrum Modulation for More Efficient EMI Control

Unlike the LT8609, where only some sub-models support spread spectrum, the entire AWK6809 series comes with built-in spread spectrum modulation technology. Combined with optimized internal switch driver design, it suppresses electromagnetic emissions at the source. The device has passed CISPR 25 Class 5 automotive EMI certification. In most applications, it can meet stringent electromagnetic compatibility requirements without the need for additional shields or complex EMI filtering circuits, simplifying PCB layout and reducing compliance costs.

3. Enhanced Protection Mechanisms Improve System Robustness

While inheriting basic functions like over-temperature protection, output short-circuit protection, and undervoltage lockout, the AWK6809 adds a low-side MOSFET current limiting circuit. This effectively clamps the inductor peak current during an output short, preventing uncontrolled energy flow. Additionally, the TR and SS pins integrate an active pull-down function, ensuring the soft-start capacitor discharges quickly after an abnormal shutdown, guaranteeing a stable and reliable system restart process. These enhanced features are particularly suitable for high-risk scenarios like automotive cold starts and industrial power surges.

4. Significant Cost Advantage, Aiding Mass Production Cost Reduction

As a high-performance domestic alternative, the AWK6809 offers considerable optimization potential for overall solution costs, given its electrical performance is comparable to or even surpasses the LT8609, combined with advantages like peripheral component reuse, no board revision, and no re-certification. This provides a competitive cost advantage for businesses in a fiercely competitive market.

The AWK6809 has passed reliability verification and mass production adoption by several Tier 1 automotive electronics and industrial customers, backed by a mature manufacturing system and stable supply chain. As the official authorized distributor for AnalogWin, MANDU provides comprehensive technical and delivery support to customers in Greater China. This includes sample application and rapid delivery, complete technical documentation, localized FAE support to assist with compatibility assessment and replacement verification from LT8609 to AWK6809, and flexible production capacity configuration to meet delivery needs from engineering prototypes to large-scale mass production. For designs currently using the LT8609, the AWK6809 offers a low-risk, high-efficiency upgrade path: achieving comprehensive optimization in power consumption, EMI performance, system reliability, and cost structure while keeping the original hardware design unchanged.

About Mandu Technology

Shenzhen Mandu Technology Co., Ltd. has steadfastly centered its operations on the distribution of high-performance, high-quality, and highly reliable integrated circuit products. Its portfolio encompasses memory chips, differential crystal oscillators, and MCU microcontrollers, while progressively integrating analog signal chain products. The company prides itself on delivering comprehensive and cost-effective solutions to its customers. Its products find applications across a broad spectrum of industries, including but not limited to network communication, industrial control, robotics, medical equipment, personal health, and numerous other fields.

Business: sales@manduic.com