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Microchip Technology MIC23250-W4YMT-TR
- Part No.:
- MIC23250-W4YMT-TR
- Manufacturer:
- Microchip Technology
- Package:
- 10-UFDFN, 10-TMLF®
- Datasheet:
-
MIC23250-W4YMT-TR.pdf
- Description:
- IC REG BUCK 1.2V/1.6V DL 10TMLF
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MIC23250-W4YMT-TR from Micrel is a fixed-output dual synchronous buck regulator delivering 1.2V/1.6V at up to 400mA per channel, operating at 4MHz with HyperLight Load™ mode for ultra-fast transient response and high light-load efficiency. It integrates two independent PWM controllers in a 10-pin 2mm × 2mm Thin MLF® package, designed for processor core and I/O rail supply in space-constrained portable electronics.
For engineers reviewing the MIC23250-W4YMT-TR datasheet, MIC23250-W4YMT-TR pinout, MIC23250-W4YMT-TR application, or MIC23250-W4YMT-TR equivalent, this page delivers verified technical context, exact pin functions, real-world application mappings, and validated alternative options - all grounded in Micrel's official June 2010 datasheet (M9999-061110-E).
Technical Context
The MIC23250-W4YMT-TR implements a proprietary HyperLight Load™ control architecture combining minimum-on/off-time pulse-frequency modulation (PFM) at light loads and fixed-frequency PWM above ~70mA (with 1µH inductor), enabling >85% efficiency at 1mA and up to 94% peak efficiency. Its dual-channel design uses separate enable inputs (EN1/EN2), independent sense pins (SNS1/SNS2), and shared power ground (PGND) with isolated analog ground (AGND) to minimize noise coupling.
Each channel features internal PMOS/NMOS synchronous rectification, 33µA quiescent current with both outputs enabled, 0.01µA shutdown current, and output voltage accuracy of ±2.5% over –40°C to +125°C junction temperature. The device requires only six external components: two 1µH inductors, three 4.7µF ceramic capacitors (input/output/bypass), and one 0.01µF AVIN bypass capacitor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 5.5V - supports single-cell Li-ion (3.0–4.2V) and USB 5V rails without pre-regulation. |
| Output Voltages | Fixed 1.2V and 1.6V - factory-trimmed for stable core/I/O supply without external feedback resistors. |
| Max Output Current | 400mA per channel - sufficient for low-power ARM Cortex-M cores and peripheral I/O domains. |
| Switching Frequency | 4MHz nominal - enables use of sub-1mm-height 1µH inductors and compact 4.7µF ceramic output capacitors. |
| Quiescent Current | 33µA (both channels enabled) - extends battery life in always-on sensor or standby modes. |
| Output Ripple | 20mVpp in HyperLight Load™ mode; 3mV in full PWM - eliminates need for additional LC filtering in noise-sensitive RF sections. |
| Package | 10-pin 2mm × 2mm Thin MLF® - RoHS-compliant, halogen-free, NiPdAu lead finish; thermal resistance θJA = 70°C/W. |
Pinout & Package
Package: 10-pin 2mm × 2mm Thin MLF® (MT), exposed thermal pad, Pb-free, RoHS-compliant.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | SNS1 | Sense input for Channel 1 output - connects directly to VOUT1 node for accurate regulation; requires low-inductance layout. |
| 2 | EN1 | Enable input for Channel 1 - logic-high (>0.8V) activates output; must not be left floating; 0.1–2µA input current. |
| 3 | AGND | Analog ground reference - separate return path for bias/control circuitry; must be connected externally to PGND at single point. |
| 4 | SW1 | Switch node for Channel 1 - high-speed connection to inductor L1; routing must avoid sensitive analog traces. |
| 5 | PGND | Power ground - high-current return path for both channels' MOSFETs; requires low-impedance copper pour under package. |
| 6 | VIN | Main power input - supplies internal MOSFETs; requires ≥2.2µF ceramic bypass capacitor close to pin and PGND. |
| 7 | SW2 | Switch node for Channel 2 - independent high-speed output for second inductor; routed separately from SW1. |
| 8 | AVIN | Analog supply input - powers control circuitry; tied to VIN but bypassed with 0.01µF capacitor to suppress switching noise. |
| 9 | EN2 | Enable input for Channel 2 - independent logic control; allows staggered startup or dynamic rail sequencing. |
| 10 | SNS2 | Sense input for Channel 2 output - identical function to SNS1; enables independent regulation of dual-rail systems. |
Key Features
| Feature | Design Value |
|---|---|
| HyperLight Load™ mode | Enables PFM operation below ~70mA load, achieving >85% efficiency at 1mA and ultra-fast transient response (<10µs). |
| Dual independent enable inputs | EN1 and EN2 allow per-rail power sequencing, dynamic voltage scaling, or fault isolation without external logic. |
| Ultra-low output ripple | 20mVpp (PFM) / 3mV (PWM) enables direct powering of RF ICs and ADCs without secondary filtering. |
| Sub-1mm solution height | Validated with 1µH inductor + 4.7µF ceramic capacitors - meets mechanical constraints of smartphones and wearables. |
| –40°C to +125°C operation | Rated for automotive cabin and industrial edge computing environments without derating. |
Applications
| Mobile Handsets | Portable Navigation Devices |
|---|---|
|
Use Scenario: Dual-rail power for application processor (1.2V core) and GPS baseband IC (1.6V I/O). IC Role / Device Role / Timing Role: Primary DC-DC converter supplying regulated core and interface voltages with independent enable control. Use Value: Eliminates need for discrete regulators or LDOs, reducing BOM count by 3+ components while maintaining <20mVpp ripple on GPS RF section. |
Use Scenario: Powering GPS receiver SoC requiring tightly regulated 1.2V digital core and 1.6V analog front-end. IC Role / Device Role / Timing Role: Dual synchronous buck regulator delivering low-noise, fast-transient power with thermal robustness for outdoor operation. Use Value: Enables continuous GPS lock during vehicle start-up transients via 4MHz switching and HyperLight Load™ recovery in <5µs. |
| WiFi/WiMax Modules | USB-Powered Devices |
|
Use Scenario: Supplying 1.2V WLAN MAC and 1.6V RF transceiver in compact M.2 or mini-PCIe modules. IC Role / Device Role / Timing Role: High-frequency dual buck regulator minimizing EMI coupling into 2.4/5GHz antenna paths. Use Value: 4MHz operation shifts switching harmonics beyond WiFi bands; 3mV PWM ripple avoids desensitization of adjacent receivers. |
Use Scenario: Power conversion from 5V USB port to dual 1.2V/1.6V rails for portable SSD controllers or USB-C peripherals. IC Role / Device Role / Timing Role: Efficient step-down regulator supporting USB suspend/resume with 0.01µA shutdown current. Use Value: Extends battery backup time in bus-powered devices by cutting quiescent loss vs. legacy 100µA solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MIC23250-G4YMT | Fixed 1.2V/1.8V outputs instead of 1.2V/1.6V; identical package, pinout, and electrical specs otherwise. | Targets applications needing 1.8V I/O (e.g., SDIO, eMMC) rather than 1.6V logic; no PCB change required if voltage tolerance permits. | Select when system I/O voltage is 1.8V; verify downstream component VIH margin against 1.2V/1.8V pair. |
| TPS62400DRVR | TI dual 400mA buck with 2.25–6.5V input, 1–3.3V adjustable outputs, 3MHz switching, 24µA IQ - no HyperLight Load™ mode. | Lacks ultra-low-light-load efficiency and sub-10µs transient response; requires external feedback resistors for fixed outputs. | Choose for wider input range or programmable outputs; accept 15–20% lower efficiency below 10mA versus MIC23250-W4YMT-TR. |
Compared with MIC23250-G4YMT, the MIC23250-W4YMT-TR provides tighter alignment with 1.6V I/O standards (e.g., certain LPDDR2 interfaces), while TPS62400DRVR trades light-load performance for flexibility and broader input support - making MIC23250-W4YMT-TR optimal for battery-critical, size-constrained dual-rail designs.
Availability
MIC23250-W4YMT-TR is available at Aetrix Electronics and suitable for mobile handsets, portable navigation devices, and USB-powered peripherals requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MIC23250-W4YMT-TR 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 semiconductor company specializing in power management, timing, and analog ICs before its acquisition by Microchip Technology in 2015. Known for innovation in high-efficiency DC-DC conversion and low-jitter clock solutions.
The MIC23250 product line was engineered specifically for ultra-compact, battery-optimized portable electronics - delivering dual-rail regulation with minimal external components and industry-leading light-load efficiency via HyperLight Load™ architecture.
FAQ
What is the output voltage configuration of the MIC23250-W4YMT-TR?
The MIC23250-W4YMT-TR is a fixed-output dual buck regulator with precisely trimmed nominal outputs of 1.2V on Channel 1 and 1.6V on Channel 2, as specified in Micrel's ordering information table. These voltages are factory-set and require no external feedback resistors, simplifying layout and reducing component count compared to adjustable variants like MIC23250-AAYMT. The MIC23250-W4YMT-TR maintains ±2.5% output accuracy across –40°C to +125°C junction temperature and full input voltage range (2.7V–5.5V).
Does the MIC23250-W4YMT-TR support independent enable control for each output channel?
Yes, the MIC23250-W4YMT-TR provides fully independent enable inputs: EN1 (Pin 2) controls Channel 1 (1.2V), and EN2 (Pin 9) controls Channel 2 (1.6V). Each input accepts standard logic-level signals (enable threshold 0.5–1.2V), draws only 0.1–2µA, and must not be left floating. This allows precise power sequencing - such as powering the 1.2V core before enabling the 1.6V I/O rail - or dynamic shutdown of one channel during low-activity states without affecting the other. The MIC23250-W4YMT-TR integrates soft-start on both channels to prevent inrush current and output overshoot during turn-on.
What inductor and capacitor values are validated for the MIC23250-W4YMT-TR?
Micrel validates the MIC23250-W4YMT-TR with a 1µH shielded power inductor (e.g., Murata LQM31PN1R0M00 or TDK GLF251812T1R0M) and three 4.7µF X5R/X7R ceramic capacitors: one 4.7µF input capacitor (C1) between VIN and PGND, two 4.7µF output capacitors (C2/C3) at VOUT1 and VOUT2, plus a 0.01µF AVIN bypass capacitor (C4). This combination achieves sub-1mm solution height, <3mV PWM ripple, and >94% peak efficiency. Inductor DCR must remain ≤120mΩ to maintain efficiency targets; capacitor voltage rating ≥6.3V is mandatory for reliability.
How does HyperLight Load™ mode improve efficiency in the MIC23250-W4YMT-TR?
HyperLight Load™ mode in the MIC23250-W4YMT-TR replaces fixed-frequency PWM with pulse-frequency modulation (PFM) at light loads (<70mA per channel), using minimum-on/off-time control to deliver energy only when needed. This reduces switching losses and gate-drive current, enabling 33µA quiescent current with both outputs active and >85% efficiency at 1mA load - far exceeding conventional 4MHz buck regulators. The MIC23250-W4YMT-TR transitions seamlessly to 4MHz PWM above the critical load point, preserving fast transient response and low ripple across the full 0–400mA range.
Is the MIC23250-W4YMT-TR pin-compatible with other MIC23250 fixed-output variants?
Yes, all 10-pin MIC23250 fixed-output variants - including MIC23250-3BYMT (0.9V/1.1V), MIC23250-C4YMT (1.2V/1.0V), MIC23250-W4YMT-TR (1.2V/1.6V), and MIC23250-G4YMT (1.2V/1.8V) - share identical 2mm × 2mm Thin MLF® packaging, pin numbering, pin functions, and thermal characteristics. This allows drop-in replacement across voltage combinations without PCB redesign, provided downstream components tolerate the specific output voltages. The MIC23250-W4YMT-TR's marking "WV4" confirms its 1.2V/1.6V configuration per Micrel's ordering table.
MIC23250-W4YMT-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- HyperLight Load®
- Package/Case:
- 10-UFDFN, 10-TMLF®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.2V, 1.6V
- Voltage - Output (Max):
- -
- Current - Output:
- 400mA
- Frequency - Switching:
- 4MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-TMLF® (2x2)
MIC23250-W4YMT-TR FAQ
1.How can I place an order for MIC23250-W4YMT-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC23250-W4YMT-TR 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 MIC23250-W4YMT-TR reliable?
The price and inventory of MIC23250-W4YMT-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC23250-W4YMT-TR is usually 5 days.
3.What payment methods are accepted for MIC23250-W4YMT-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC23250-W4YMT-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC23250-W4YMT-TR?
MIC23250-W4YMT-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC23250-W4YMT-TR 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 MIC23250-W4YMT-TR?
For technical support, including MIC23250-W4YMT-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC23250-W4YMT-TR requirements.
6.How does Aetrix verify that MIC23250-W4YMT-TR is sourced from the original manufacturer or authorized distributors?
All MIC23250-W4YMT-TR 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 MIC23250-W4YMT-TR meets industry standards.
7.What is the process for return or replacement of MIC23250-W4YMT-TR?
All MIC23250-W4YMT-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC23250-W4YMT-TR, 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 MIC23250-W4YMT-TR part is unused and in its original packaging.
Return procedure for MIC23250-W4YMT-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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