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Microchip Technology MIC2128YML-TRVAO
- Part No.:
- MIC2128YML-TRVAO
- Manufacturer:
- Microchip Technology
- Category:
- DC DC Switching Controllers
- Package:
- 16-VFQFN Exposed Pad
- Datasheet:
-
MIC2128YML-TRVAO.pdf
- Description:
- SYNC BUCK CONTROLLER
- Quantity:
- Payment:
- Shipping:
Inventory:3,909
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Product details
Overview
MIC2128YML-TRVAO from Microchip Technology is a constant-frequency synchronous buck controller with adaptive on-time control architecture, designed for high-input-voltage DC/DC conversion. It operates from 4.5V to 75V input, delivers adjustable output from 0.6V to 30V (±1% reference accuracy), supports 270–800 kHz programmable switching frequency, and integrates internal bootstrap diode, auxiliary EXTVDD LDO, and hiccup-mode short-circuit protection. It is AEC-Q100 qualified and used in automotive power supplies and industrial distributed power systems.
For engineers reviewing the MIC2128YML-TRVAO datasheet, MIC2128YML-TRVAO pinout, MIC2128YML-TRVAO application, or MIC2128YML-TRVAO equivalent, key selection considerations include its wide VIN range, pre-biased start-up capability, external soft-start control, PG signal for sequencing, and thermal shutdown with 150°C trip point - all critical for robust high-voltage buck designs.
Technical Context
The MIC2128YML-TRVAO implements adaptive on-time control using feedback node ripple to achieve fast load transient response without external compensation. Its tON(MIN) of 80 ns and tOFF(MIN) of 230 ns enable stable operation across wide input-to-output voltage ratios while maintaining near-constant switching frequency.
It features dual LDOs: a 5.1 V PVDD regulator (4.8–5.4 V, ±10 mA) for gate drivers and an EXTVDD bypass path (4.4–4.85 V threshold) that improves system efficiency by sourcing bias from the converter output. The device supports safe monotonic start-up into prebiased outputs and includes open-drain PG signaling at 85–95% VOUT.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 75 V - enables direct integration into 24 V, 48 V, and 60 V industrial and automotive bus systems without pre-regulation. |
| Output Voltage Accuracy | ±1% over –40°C to +125°C - ensures tight regulation for sensitive downstream logic and analog circuitry. |
| Switching Frequency | 270 kHz to 800 kHz (programmable via FREQ pin) - allows EMI optimization and inductor size trade-offs across diverse power levels. |
| Reference Voltage | 0.600 V ±3 mV (–40°C to +125°C) - sets precise FB divider ratio for accurate output setting independent of temperature drift. |
| Junction Temperature Range | –40°C to +125°C (AEC-Q100 qualified) - validated for under-hood automotive and harsh industrial environments. |
| Thermal Shutdown | 150°C with 15°C hysteresis - protects against sustained overload or poor heatsinking without latch-up. |
| Power Good Threshold | 85–95% of VOUT with 100 µs delay - provides reliable sequencing signal for multi-rail systems without external comparators. |
Pinout & Package
The MIC2128YML-TRVAO is housed in a thermally enhanced 16-pin 3 mm × 3 mm VQFN package with exposed thermal pad (EP), optimized for high-power density and low θJA (50.8°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (PG) | Open-drain Power Good output | Signals regulation status; requires external pull-up; asserts low when FB falls >10% below 0.6 V reference. |
| 2 (ILIM) | Current limit programming input | Connects to SW via resistor to set overcurrent threshold; supports lossless RDS(ON)-based sensing. |
| 3 (SW) | Switch node connection | Common drain-source junction of external high-side and low-side MOSFETs; used for current sense and bootstrap return. |
| 4 (BST) | Bootstrap capacitor supply | Drives high-side gate driver; requires ≥0.1 µF ceramic cap between BST and SW for proper floating bias. |
| 5 (DH) | High-side N-MOSFET gate driver | Provides pulsed drive to external high-side FET gate; features 2 Ω typical pull-up/pull-down resistance. |
| 6 (PGND) | Power ground reference | Return path for low-side driver and current-sense comparator; must connect to low-side MOSFET source and PVDD bypass cap. |
| 7 (DL) | Low-side N-MOSFET gate driver | Drives external low-side FET gate; 0.36 Ω typical pull-down resistance minimizes conduction loss. |
| 8 (PVDD) | Internal high-voltage LDO output | 5.1 V ±300 mV regulated supply for gate drivers; requires ≥4.7 µF ceramic decoupling to PGND. |
| 9 (EXTVDD) | Auxiliary LDO input | Accepts 4.7–14 V from converter output to improve efficiency; bypassed with ≥1 µF ceramic cap to AGND. |
| 10 (EN) | Enable logic input | Active-high control (1.6 V min high, 0.6 V max low); supports system-level power sequencing and standby modes. |
| 11 (FREQ) | Switching frequency programming | Voltage divider from VIN to AGND sets fSW; tie to VIN for 800 kHz fixed operation. |
| 12 (SS) | Soft-start timing capacitor | 1.3 µA current source charges external cap to control ramp rate; prevents inrush current during startup. |
| 13 (FB) | Feedback voltage input | Senses output via resistor divider; regulated to 0.6 V reference; bias current <500 nA minimizes divider error. |
| 14 (AGND) | Analog ground reference | Reference for FB, SS, EN, PG, ILIM; must be connected to PGND at single-point star ground to avoid noise coupling. |
| 15 (VDD) | Analog circuit supply | Powered from PVDD via RC filter; requires ≥4.7 µF ceramic cap to AGND for stable internal bias. |
| 16 (VIN) | Main input supply | Primary HV input (4.5–75 V); bypassed with ≥0.1 µF ceramic cap to PGND for high-frequency noise suppression. |
| EP | Exposed thermal pad | Must be soldered to AGND copper plane for thermal dissipation and EMI reduction; contributes to θJC = 25.3°C/W. |
Key Features
| Feature | Design Value |
|---|---|
| Hyper Speed Control® Architecture | Enables ultra-fast load transient response (<200 µs recovery from 0→5 A step) and stable operation with any ceramic output capacitor - eliminates need for specialized low-ESR types. |
| Adaptive On-Time Control | Maintains near-constant switching frequency across 4.5–75 V input and full load range without external compensation components. |
| Pre-Biased Output Start-Up | Supports monotonic ramp-up even when output is precharged, preventing reverse current flow and protecting downstream loads. |
| Auxiliary EXTVDD LDO | Improves system efficiency by powering internal analog circuits from the regulated output instead of high-voltage input rail. |
| Hiccup-Mode Short-Circuit Protection | Enters intermittent restart cycle during sustained overload - limits average power dissipation and prevents thermal runaway. |
Applications
| Automotive Infotainment Power Supply | Industrial PLC I/O Module |
|---|---|
|
Use Scenario: 12 V or 24 V vehicle battery powers a 5 V/3 A infotainment processor rail with strict EMI and thermal constraints. IC Role / Device Role / Timing Role: Synchronous buck controller managing high-efficiency step-down conversion with adaptive on-time control for dynamic load handling. Use Value: AEC-Q100 qualification ensures reliability; 75 V absolute max rating accommodates load-dump transients; PG signal enables safe SoC reset sequencing. |
Use Scenario: 48 V industrial backplane supplies isolated 3.3 V/2 A rails for digital I/O and sensor interfaces in harsh factory environments. IC Role / Device Role / Timing Role: High-input-voltage buck controller delivering tightly regulated output with minimal external components and no loop compensation. Use Value: Wide VIN range eliminates pre-regulator stage; –40°C to +125°C operation supports uncooled enclosures; hiccup protection sustains uptime during field wiring faults. |
| Telecom Base Station PSU | Server Rack DC-DC Intermediate Bus |
|
Use Scenario: 54 V telecom rectified input converted to 12 V intermediate bus for downstream POL converters in 5G base station RF modules. IC Role / Device Role / Timing Role: Primary buck controller operating at 300 kHz for optimal magnetics size and EMI profile in dense RF-sensitive layouts. Use Value: Programmable frequency avoids critical RF bands; EXTVDD LDO reduces input-stage losses; soft-start prevents inrush-induced voltage sag on shared bus. |
Use Scenario: 48 V server rack bus stepped down to 12 V/10 A for GPU and ASIC power delivery with high transient immunity. IC Role / Device Role / Timing Role: Adaptive on-time buck controller providing sub-100 µs load transient response to handle bursty compute workloads. Use Value: Any Capacitor™ stability allows use of low-cost X7R ceramics; 85%+ efficiency at full load reduces thermal load in air-cooled chassis. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5116PWPR | Current-mode control; wider 6–100 V input; no integrated EXTVDD LDO; requires external compensation. | Better suited for ultra-wide VIN applications (>75 V) and designs requiring peak-current limiting for precise OCP. | Select LM5116PWPR when input exceeds 75 V or when design requires current-mode loop stability analysis and external compensation flexibility. |
| MP2482DS-LF-Z | VIN max 60 V; fixed 340 kHz fSW; no soft-start pin; no PG output; smaller 8-pin SOIC package. | Targeted at cost-sensitive, space-constrained industrial SMPS where pre-bias start-up and sequencing are not required. | Choose MP2482DS-LF-Z for compact, lower-BOM-cost 60 V-class buck controllers where AEC-Q100 and PG functionality are unnecessary. |
Compared with LM5116PWPR and MP2482DS-LF-Z, the MIC2128YML-TRVAO uniquely combines AEC-Q100 qualification, EXTVDD efficiency boost, and pre-biased start-up in a 3×3 mm footprint - making it optimal for automotive and high-reliability industrial buck stages where input transients, thermal margin, and sequencing integrity are critical.
Availability
MIC2128YML-TRVAO is available at Aetrix Electronics and suitable for automotive power supplies, industrial PLCs, telecom base stations, and server intermediate bus converters requiring stable component supply, long-term lifecycle support, and AEC-Q100 compliance.
Supply support for MIC2128YML-TRVAO includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microchip Technology Inc. is a leading provider of microcontrollers, analog devices, and power management ICs, with deep expertise in automotive, industrial, and communications markets.
The MIC2128YML-TRVAO belongs to Microchip's high-voltage synchronous buck controller product line, engineered specifically for robust, high-efficiency DC/DC conversion in demanding environments where wide input range, thermal resilience, and functional safety are essential.
FAQ
What is the maximum input voltage rating for the MIC2128YML-TRVAO?
The MIC2128YML-TRVAO has an absolute maximum input voltage rating of +76 V on VIN, FREQ, ILIM, and SW pins, with a recommended operating range of 4.5 V to 75 V. This allows direct use with 48 V and 60 V industrial buses and withstands automotive load-dump transients up to 75 V without derating. Operation beyond 75 V risks permanent damage and is outside specification.
Does the MIC2128YML-TRVAO support start-up into a pre-biased output?
Yes, the MIC2128YML-TRVAO supports safe monotonic start-up into a prebiased output. Its adaptive on-time control and internal logic prevent reverse current flow during initial ramp-up, eliminating the need for external blocking diodes or complex sequencing circuits. This feature is confirmed in the datasheet's General Description and Figure 2-28.
How is the switching frequency programmed on the MIC2128YML-TRVAO?
The MIC2128YML-TRVAO switching frequency is programmed via the FREQ pin using a resistor divider from VIN to AGND. The frequency scales linearly with the FREQ pin voltage: 33% of VIN yields ~270 kHz, while tying FREQ directly to VIN sets 800 kHz. No external clock source or crystal is required - all timing is internally generated and self-adjusting.
What is the purpose of the EXTVDD pin on the MIC2128YML-TRVAO?
The EXTVDD pin on the MIC2128YML-TRVAO accepts 4.7–14 V from the converter output to power the internal low-voltage LDO, improving overall system efficiency by reducing input-stage power loss. When enabled, it bypasses the higher-loss PVDD path, lowering quiescent current and thermal stress - especially beneficial in high-VIN, low-VOUT applications.
Is the MIC2128YML-TRVAO pin-compatible with other members of the MIC2128 family?
Yes, the MIC2128YML-TRVAO shares identical pinout, package (3×3 mm VQFN-16), and electrical interface with all MIC2128 variants including MIC2128YML and MIC2128YML-TR. The "VAO" suffix denotes AEC-Q100 qualification and extended temperature grading (–40°C to +125°C), but does not alter pin function, layout, or PCB footprint.
MIC2128YML-TRVAO Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- Hyper Speed Control®
- Package/Case:
- 16-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Type:
- Transistor Driver
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Number of Outputs:
- 1
- Output Phases:
- 1
- Voltage - Supply (Vcc/Vdd):
- 4.5V ~ 75V
- Frequency - Switching:
- 270kHz ~ 800kHz
- Duty Cycle (Max):
- 85%
- Synchronous Rectifier:
- Yes
- Clock Sync:
- No
- Serial Interfaces:
- -
- Control Features:
- Enable, Frequency Control, Power Good, Soft Start
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QFN (3x3)
MIC2128YML-TRVAO FAQ
1.How can I place an order for MIC2128YML-TRVAO through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC2128YML-TRVAO on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MIC2128YML-TRVAO reliable?
The price and inventory of MIC2128YML-TRVAO are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC2128YML-TRVAO is usually 5 days.
3.What payment methods are accepted for MIC2128YML-TRVAO?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC2128YML-TRVAO transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC2128YML-TRVAO?
MIC2128YML-TRVAO orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC2128YML-TRVAO order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MIC2128YML-TRVAO?
For technical support, including MIC2128YML-TRVAO datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC2128YML-TRVAO requirements.
6.How does Aetrix verify that MIC2128YML-TRVAO is sourced from the original manufacturer or authorized distributors?
All MIC2128YML-TRVAO products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MIC2128YML-TRVAO meets industry standards.
7.What is the process for return or replacement of MIC2128YML-TRVAO?
All MIC2128YML-TRVAO units undergo pre-shipment inspection (PSI). If there is an issue with MIC2128YML-TRVAO, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MIC2128YML-TRVAO part is unused and in its original packaging.
Return procedure for MIC2128YML-TRVAO:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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