Stock Name: 希荻微
Stock Code: 688173
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Stock Name: 希荻微
Stock Code: 688173
- All
- Product Management
- News Information
- Introduction Content
- Corporate Outlets
- Frequently Asked Questions
- Corporate Video
- Corporate Album
Halo Micro Launches I²C Programmable Hysteretic POL HL8112 for High-Density Computing Power Supply
July 29, 2026
Optimized for SSD, Networking & Edge Computing Devices
Halo Microelectronics recently unveiled HL8112FN02, an industrial-grade synchronous hysteretic buck converter engineered for high-density point-of-load (POL) power delivery. Housed in a compact 3mm×4mm QFN-14 package, the device delivers 12A continuous and 15A peak output current, alongside full I²C programmability and dynamic voltage scaling (DVS). It delivers a highly flexible, fast-transient power management solution for edge computing SoCs, enterprise SSDs, networking hardware, and auxiliary server power rails.
New Demands on POL Power Supplies for Industrial High-Density Deployments
Driven by surging power and density requirements from AI inference, PCIe 5.0 storage, and 5G base stations, point-of-load power supplies face three critical challenges:
- Severe space constraints: Densely packed multi-voltage rails leave minimal PCB real estate;
- Extreme load transients: Processors and FPGAs undergo microsecond-scale frequency and current spikes, demanding ultra-fast power loop response;
- Diverse voltage rail specifications: Systems commonly require multiple output levels including 0.5V, 0.75V, 1.2V, 1.8V and 3.3V, with runtime voltage adjustment mandatory.
Traditional fixed-parameter DC-DC converters can no longer satisfy these needs, making fully digitally programmable, compact, high-current POL regulators an essential design choice.
I²C Digital Interface: Dynamic Power Tuning Aligned with Processor Operation
HL8112 features a standard I²C interface supporting up to 3.4MHz high-speed mode. Eight dedicated registers (0x00~0x07) enable comprehensive real-time configuration and monitoring, balancing user-friendliness and low-latency performance. All tunable parameters, defined in the official datasheet, include:
- Output reference voltage (VREF): 0.5V to 1.108V with 4mV step size, default 0.72V (configurable via A0/REF pins); accuracy ±0.5% (-10°C to 85°C) / ±1% (-40°C to 125°C)
- DVS slew rate: 8 selectable levels (0.625, 1.25, 2.5, 5, 10, 20, 30, 40 mV/μs), default 5mV/μs
- Switching frequency: Four options – 500kHz, 750kHz, 1MHz, 1.25MHz, default 500kHz
- Operating mode: Auto PFM/PWM at light load, or forced PWM via register (supports negative inductor current limited to -4A)
- Valley current limit threshold: 8 I²C-programmable tiers (16A, 14A, 12A down to 5A), default 14A
- Protection recovery schemes: OCP configurable for hiccup or latch-off; OVP selectable between auto-recovery and permanent latch
- PG deglitch time: Four options (<1μs, 6μs, 12μs, 30μs), default 30μs
- Output discharge duration during shutdown: Register-selectable 3ms or 10ms
The IC integrates two 8-bit ADCs that sample twice every 2ms, enabling real-time monitoring of output voltage (20mV LSB, 0.5V–5.6V range) and output current (50mA LSB, 0–12.75A range). External sense circuits are eliminated, simplifying system-level power consumption tracking and fault pre-warning.
Hysteretic Control + Low Rds(on) MOSFETs: Balanced Efficiency & Transient Performance
HL8112 adopts a synchronous hysteretic control architecture. It automatically switches to PFM mode under light load, with typical no-load quiescent current of 400μA (max 600μA) to drastically boost light-load efficiency. At heavy loads, the converter switches to fixed-frequency PWM for low output ripple and superior transient response.
Integrated power MOSFETs feature typical on-resistance of 15mΩ (high-side) and 4.5mΩ (low-side). With a minimum on-time of 50ns and minimum off-time of 185ns, the device supports wide duty-cycle regulation even at high switching frequencies.
An optional feedforward capacitor (CFF) further optimizes loop phase margin and load transient stability, delivering robust power delivery during instantaneous heavy current surges from processing cores.
Comprehensive Protection Suite for Industrial-Grade Reliability
HL8112 embeds a full set of hardware protection functions with configurable fault response behaviors, fully documented in the datasheet:
- Input Under-Voltage Lockout (UVLO): Typical rising threshold 2.75V, falling threshold 2.6V
- Output Over-Voltage Protection (OVP): Triggered when FB voltage exceeds 125% of reference with 15% hysteresis; configurable for auto-recovery or latch
- Cycle-by-cycle valley current limiting with programmable thresholds and -4A typical negative inductor current clamp
- Short-circuit protection: Activates when VOUT drops below 60% of reference for 0.8ms deglitch time; supports hiccup mode or permanent latch (reset via power cycle or EN pin toggle)
- Thermal shutdown: Triggers at 160°C, auto-recovers at 140°C; a 120°C over-temperature warning flag is accessible via registers
- Adjustable soft-start: Startup slope set by external capacitor with typical 7μA charging current; supports pre-biased output startup
- Shutdown output discharge: Register-enabled with selectable 3ms / 10ms discharge intervals
An open-drain Power Good (PG) pin indicates valid output voltage within a ±15% window of the reference, supporting multi-rail power sequencing control.
Versatile Deployment & Accelerated Design Cycles
HL8112 accepts wide input voltage from 2.85V to 18V. External feedback resistors set output voltage between 0.5V and 5.5V. Halo Micro provides complete design resources to speed up customer development:
- Recommended reference BOM, including exact part numbers and specifications for input/output capacitors, bootstrap capacitors, feedforward capacitors, soft-start capacitors and VCC bypass capacitors
- Inductor selection table covering 0.47μH to 1.5μH, with vendor part numbers, DCR and saturation current ratings
- Mandatory PCB layout guidelines: Place input capacitors directly adjacent to VIN/PGND without vias; route SW traces short and wide; isolate FB feedback traces from noise sources; single-point grounding for power and analog grounds
Key Target Applications
- Application Processors
- Solid-State Drives (SSDs)
- Set-Top Boxes
- Distributed Power Systems
- Networking Equipment & Servers
Summary
Packaged in a tiny 3mm×4mm footprint yet capable of 12A continuous / 15A peak output, the HL8112FN02 combines full digital I²C control for unparalleled design flexibility, configurable multi-layer protection and built-in ADC monitoring to deliver industrial-grade robustness. It serves as an optimized single-rail high-density POL solution that strikes an ideal balance between board space, power efficiency, design flexibility and total system cost.
HL8112 is now mass-production ready. Evaluation samples, demo boards and full technical support are available upon request. For product inquiries or sample applications, contact Halo Microelectronics sales representatives or visit our official website.
About Halo Microelectronics
Halo Microelectronics(Stock Code: 688173) develops analog and power management integrated circuits enabling energy-efficient smart systems. Since 2012, Halo Microelectronics has been driving innovation in Mobile, IoT, and Automotive systems. Find out more at: http://www.halomicro.com.
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