My Inquiry
My Account
Microchip Technology MIC2124YMM
- Part No.:
- MIC2124YMM
- Manufacturer:
- Microchip Technology
- Category:
- DC DC Switching Controllers
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MIC2124YMM.pdf
- Description:
- IC REG CTRLR BUCK 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,492
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MIC2124YMM from Micrel is a constant-frequency, synchronous current-mode buck controller in the Hyper Speed Control™ family. It operates from 3V–18V input, delivers up to 25A output at adjustable down-to-0.8V, and runs at fixed 300kHz switching frequency with adaptive on-time control-used in microprocessor core supplies and high-power DC-DC conversion stages.
For engineers reviewing the MIC2124YMM datasheet, MIC2124YMM pinout, MIC2124YMM application, or MIC2124YMM equivalent, key selection considerations include its all-N-MOSFET architecture, no external current-sense resistor requirement, EN/COMP dual-function shutdown/compensation pin, and MSOP-10 package compatibility with high-density PCB layouts.
Technical Context
The MIC2124YMM implements adaptive on-time current-mode control using valley-current sensing via the low-side MOSFET's RDS(ON), eliminating slope compensation and enabling stable operation with any capacitor type (zero-to-high ESR). Its fixed 300kHz nominal switching frequency is derived from VOUT/VHSD estimation, while cycle-by-cycle foldback current limiting and internal 4ms digital soft-start ensure robust startup and fault protection.
Control loop stability relies on external compensation connected to the EN/COMP pin, with FB regulated precisely to 0.8V ±1% across –40°C to +125°C. The IC separates signal ground (GND) and power ground (PGND), supports pre-bias output safe start-up, and integrates thermal shutdown at 160°C with 5°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 300 kHz fixed nominal; enables predictable EMI filtering and simplifies magnetics design. |
| Input Voltage Range (HSD) | 3.0 V to 18 V; supports wide-range industrial and telecom inputs without external regulators. |
| Output Voltage Range | Adjustable down to 0.8 V with ±1% FB accuracy; meets modern low-voltage CPU/GPU core requirements. |
| Max Output Current | 25 A; achieved with external N-MOSFETs-no integrated power stage limits thermal scalability. |
| Control Architecture | Adaptive on-time current mode; uses bottom-FET RDS(ON) for lossless current sensing-no sense resistor needed. |
| Soft-Start Duration | Internal 4 ms digital ramp; limits inrush current during power-up and prevents output overshoot. |
| Junction Temp Range | –40°C to +125°C; validated for automotive under-hood and industrial embedded environments. |
Pinout & Package
Package: 10-pin MSOP (MM), exposed pad optional, Pb-free finish, θJA = 130°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 HSD | High-side drain input | Connects to input rail (3–18 V); senses power stage supply voltage and provides path for input capacitors to PGND. |
| 2 EN/COMP | Enable input / error amp output | Pull low to shut down (IQ ≈ 1 mA); also carries gm amplifier output for external loop compensation. |
| 3 FB | Feedback input | Regulated to 0.8 V ±1%; sets output voltage via resistor divider-accuracy critical for low-VOUT regulation. |
| 4 GND | Signal ground reference | Return for IN, FB, COMP; must be isolated from PGND to avoid noise coupling into control circuitry. |
| 5 IN | Control section supply | 3–5.5 V bias for internal logic/reference; connect to HSD only if VHSD ≤ 5.5 V. |
| 6 DL | Low-side gate driver output | Drives external N-MOSFET gate from GND to IN; low RDS(ON) (1–2 Ω) ensures fast turn-off. |
| 7 PGND | Power ground return | Common node for LX, low-side FET source, and input/output capacitor negatives-requires short, low-inductance layout. |
| 8 DH | High-side gate driver output | Floating drive referenced to LX; swings from VLX to VBST; supports bootstrap-based N-MOSFET high-side switching. |
| 9 LX | Switch node / current sense | Connects directly to external switch node; senses valley current during OFF time via low-side RDS(ON). |
| 10 BST | Bootstrap capacitor connection | Connects 0.1 µF capacitor to LX; supplies floating gate drive voltage for DH-critical for high-side N-MOSFET conduction. |
Key Features
| Feature | Design Value |
|---|---|
| All-N-MOSFET topology | Enables higher efficiency than P/N combinations by leveraging low RDS(ON) N-channel devices on both sides. |
| No current-sense resistor | Reduces BOM cost, board space, and conduction losses by using intrinsic RDS(ON) of low-side FET for current monitoring. |
| Any Capacitor™ stability | Guarantees loop stability with zero-ESR (ceramic) to high-ESR (tantalum/electrolytic) output capacitors-no compensation redesign needed. |
| Pre-bias output safe start | Allows controlled ramp-up even when output is pre-charged-prevents reverse current flow and protects downstream loads. |
| Cycle-by-cycle foldback current limit | Provides immediate overcurrent protection with FB-dependent threshold (e.g., –127 mV at FB = 0.8 V), reducing stress during short circuits. |
Applications
| Microprocessor Core Supply | Telecom Power Conversion |
|---|---|
Use Scenario: Delivering tightly regulated 0.8–1.8 V at up to 25 A to x86 or ARM-based SoCs in servers and networking equipment. IC Role / Device Role / Timing Role: Synchronous buck controller managing high-efficiency, high-transient-response DC-DC conversion with adaptive on-time control. Use Value: Achieves >94% peak efficiency and fast load-step recovery due to valley-current sensing and 300 kHz fixed-frequency operation. | Use Scenario: Generating intermediate bus voltages (e.g., 3.3 V, 5 V) from 12 V or 48 V telecom inputs in routers, gateways, and base station subsystems. IC Role / Device Role / Timing Role: Constant-frequency current-mode controller enabling predictable EMI performance and simplified filter design in noisy telecom environments. Use Value: Supports wide input range (3–18 V) and maintains ±1% output accuracy across temperature-critical for multi-rail system reliability. |
| Graphics Card VRM | Industrial Embedded Power |
Use Scenario: Providing dynamic, multi-phase-compatible core voltage to GPU ASICs in high-performance workstations and gaming platforms. IC Role / Device Role / Timing Role: Single-phase buck controller serving as building block for scalable VRM solutions-supports external phase-interleaving via SYNC signals (in compatible variants). Use Value: Enables precise 0.8 V output with ±1% FB tolerance and thermal shutdown at 160°C-ensuring safe operation under sustained GPU load. | Use Scenario: Powering FPGA, DSP, or MCU cores in factory automation controllers, PLCs, and motor drives operating in harsh ambient conditions. IC Role / Device Role / Timing Role: Robust synchronous buck controller with –40°C to +125°C junction rating and pre-bias safe start for brown-out resilience. Use Value: Delivers stable low-voltage rails despite input sags, thanks to UVLO (2.7 V trip) and internal soft-start-reducing system-level reset events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP24894DJ-LF-P | Fixed 500 kHz frequency; integrated high-/low-side MOSFETs (12 A max); no external compensation required. | Suitable for lower-current, space-constrained designs where integration reduces component count-but lacks MIC2124YMM's 25 A scalability and wide 3–18 V HSD range. | Select MP24894DJ-LF-P when board area is critical and output current ≤12 A; retain MIC2124YMM for high-power, thermally managed, or multi-phase-expandable systems. |
| LM5116WGX/NOPB | Current-mode controller with 50–750 kHz programmable frequency; supports bootstrap and high-side gate drive; requires external current-sense resistor. | Offers wider frequency tuning and enhanced transient response for ultra-low-noise applications-but adds BOM cost and layout complexity versus MIC2124YMM's resistorless sensing. | Choose LM5116WGX/NOPB for designs requiring frequency optimization or tighter transient specs; prefer MIC2124YMM for cost-sensitive, high-current, or ESR-flexible capacitor deployments. |
Compared with MP24894DJ-LF-P and LM5116WGX/NOPB, the MIC2124YMM uniquely combines 25 A capability, 3–18 V HSD range, resistorless current sensing, and Any Capacitor™ stability-making it optimal for high-efficiency, high-power, and thermally demanding synchronous buck implementations.
Availability
MIC2124YMM is available at Aetrix Electronics and suitable for microprocessor core supplies, telecom power conversion, and industrial embedded power systems requiring stable component supply, long-term lifecycle support, and consistent parametric performance.
Supply support for MIC2124YMM 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
Micrel Inc. was a U.S.-based analog and mixed-signal semiconductor company founded in 1978 and acquired by Microchip Technology in 2015. It specialized in power management, timing, and interface ICs for industrial and communications markets.
The MIC2124YMM belongs to Micrel's Hyper Speed Control™ family of synchronous buck controllers-designed specifically for high-efficiency, high-current, and wide-input-voltage DC-DC conversion in computing, networking, and embedded systems.
FAQ
What is the recommended input voltage range for the MIC2124YMM control section (IN pin)?
The MIC2124YMM requires 3.0 V to 5.5 V on the IN pin to power its internal reference and control circuitry. This is independent of the main power input (HSD), which ranges from 3 V to 18 V. If VHSD ≤ 5.5 V, IN may be tied directly to HSD; otherwise, a separate 3–5.5 V supply is mandatory. Operating IN outside this range risks functional failure or damage.
Does the MIC2124YMM require an external current-sense resistor?
No, the MIC2124YMM does not require an external current-sense resistor. It implements lossless current sensing by monitoring the voltage drop across the RDS(ON) of the external low-side N-MOSFET during its OFF time. This method eliminates added cost, board space, and conduction losses-confirmed in the Functional Description and Electrical Characteristics sections of the MIC2124YMM datasheet.
How does the MIC2124YMM achieve stable operation with different output capacitor types?
The MIC2124YMM achieves stable operation with any capacitor type-including zero-ESR ceramic and high-ESR tantalum or electrolytic-via its adaptive on-time current-mode architecture and optimized internal compensation. This "Any Capacitor™" capability is validated across the full ESR range and eliminates the need for re-tuning external compensation components when changing capacitor families in the MIC2124YMM design.
What is the function of the EN/COMP pin on the MIC2124YMM?
The EN/COMP pin on the MIC2124YMM serves two distinct functions: (1) Enable/disable control-pulling it low shuts down the device, reducing quiescent current to ~1 mA; (2) Error amplifier output-connecting external RC networks here sets loop compensation for the feedback control system. Its dual role simplifies PCB layout but requires careful decoupling to avoid interference between shutdown signaling and compensation stability in the MIC2124YMM application.
What is the maximum duty cycle supported by the MIC2124YMM, and how is it determined?
The MIC2124YMM supports a maximum duty cycle of 91% typical, determined by its minimum off-time (TOFF(min)) of 350 ns and fixed 300 kHz switching frequency (TS = 3.33 µs). The theoretical maximum is DMAX = 1 − TOFF(min)/TS ≈ 89.5%, aligning with the 89–93% spec range in the Electrical Characteristics table. Exceeding this limit risks insufficient BST capacitor recharge and high-side driver failure in the MIC2124YMM design.
MIC2124YMM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- Hyper Speed Control®
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- 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):
- 3V ~ 18V
- Frequency - Switching:
- 300kHz
- Duty Cycle (Max):
- 91%
- Synchronous Rectifier:
- Yes
- Clock Sync:
- No
- Serial Interfaces:
- -
- Control Features:
- Enable
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP
MIC2124YMM FAQ
1.How can I place an order for MIC2124YMM through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC2124YMM 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 MIC2124YMM reliable?
The price and inventory of MIC2124YMM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC2124YMM is usually 5 days.
3.What payment methods are accepted for MIC2124YMM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC2124YMM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC2124YMM?
MIC2124YMM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC2124YMM 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 MIC2124YMM?
For technical support, including MIC2124YMM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC2124YMM requirements.
6.How does Aetrix verify that MIC2124YMM is sourced from the original manufacturer or authorized distributors?
All MIC2124YMM 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 MIC2124YMM meets industry standards.
7.What is the process for return or replacement of MIC2124YMM?
All MIC2124YMM units undergo pre-shipment inspection (PSI). If there is an issue with MIC2124YMM, 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 MIC2124YMM part is unused and in its original packaging.
Return procedure for MIC2124YMM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MIC2124YMM Tags
-
UCC28C45DR
Texas Instruments
-
UCC28C40DR
Texas Instruments
-
UCC28C43DR
Texas Instruments
-
ZXSC410E6TA
Diodes Incorporated
-
LM3524DMX/NOPB
Texas Instruments
-
LM3489MMX/NOPB
Texas Instruments
-
MIC2102YML-TR
Microchip Technology
-
LM5148RGYR
Texas Instruments
-
TL598CDR
Texas Instruments
-
LM5155DSSR
Texas Instruments
-
LM25085MYX/NOPB
Texas Instruments
-
UCC2813DTR-0
Texas Instruments
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
