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Microchip Technology MIC23155YMT-TR
- Part No.:
- MIC23155YMT-TR
- Manufacturer:
- Microchip Technology
- Package:
- 10-UFDFN Exposed Pad, 10-TMLF®
- Datasheet:
-
MIC23155YMT-TR.pdf
- Description:
- IC REG BUCK ADJ 2A 10TMLF
- Quantity:
- Payment:
- Shipping:
Inventory:2,172
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Product details
Overview
MIC23155YMT-TR from Micrel is a 3MHz synchronous buck regulator delivering up to 2A output current with HyperLight Load® mode, power good (PG) indicator, and programmable soft start. It operates from 2.7V–5.5V input, supports adjustable output down to 0.7V via external resistor divider, and achieves 94% peak efficiency in continuous conduction mode. Its 2.5mm × 2.5mm Thin DFN package enables compact power delivery for mobile processor core rails.
For engineers reviewing the MIC23155YMT-TR datasheet, MIC23155YMT-TR pinout, MIC23155YMT-TR application, or MIC23155YMT-TR equivalent, key selection criteria include light-load efficiency (85% at 1mA), ultra-fast transient response, active output discharge, and compatibility with ultra-small passive components (0.47µH inductor, 2.2µF output capacitor).
Technical Context
The MIC23155YMT-TR implements a proprietary minimum-on/off-time control architecture enabling seamless transition between HyperLight Load® discontinuous mode (for high efficiency at light loads) and fixed-frequency 3MHz PWM mode (for stable regulation above ~180mA). It integrates fully matched PMOS and NMOS power switches with typical RDSON of 0.20Ω/0.19Ω.
Its feedback loop uses a precision 0.62V internal reference (±1.5% over temperature), with FB pin bias current <1nA, enabling accurate adjustable output voltage setting. The device includes thermal shutdown (160°C), current limit (~2.2A), undervoltage lockout (2.55V typ), and active discharge path through the SNS pin when disabled.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 5.5V - supports single-cell Li-ion and USB-powered systems without pre-regulation. |
| Output Current | Up to 2A - sufficient for application processors, FPGAs, and high-speed memory I/O rails. |
| Switching Frequency | 3MHz (typ) - enables use of sub-1µH inductors and reduces output ripple without large capacitors. |
| Quiescent Current | 22µA (typ) - minimizes battery drain in always-on subsystems like RTC or sensor hubs. |
| Efficiency @ 1mA | 85% (typ) - critical for standby power in portable devices with extended sleep cycles. |
| Power Good Threshold | 91% of VOUT (rising) - provides reliable system reset signaling with 7% hysteresis. |
| Soft Start Time | 320µs (with 470pF capacitor) - prevents inrush current and output overshoot during power-up. |
| Operating Junction Temp | –40°C to +125°C - qualified for automotive infotainment and industrial edge computing environments. |
Pinout & Package
Package: 10-pin 2.5mm × 2.5mm Thin DFN with exposed thermal pad (ePAD), RoHS-compliant NiPdAu finish, halogen-free mold compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW | Switch Node | High-frequency switching node connecting to inductor; requires tight layout to minimize EMI and ringing. |
| EN | Enable Input | Active-high logic control; 0.5V low / 1.2V high thresholds; must not be left floating. |
| SNS | Sense / Discharge | Direct connection to output for regulation; provides active discharge path to PGND when EN = low. |
| FB | Feedback Input | Connects to resistor divider for adjustable output; 0.62V reference enables precise VOUT tuning from 0.7V. |
| PG | Power Good Output | Open-drain signal requiring external pull-up; asserts high when VOUT ≥ 91% of target. |
| SS | Soft Start Control | Capacitor-connected pin controlling ramp time; 2.7µA constant current source sets rise profile. |
| AGND | Analog Ground | Reference ground for control circuitry; must be separated from PGND to avoid noise coupling. |
| VIN | Input Supply | Dual pins (8 & 9) for low-impedance power entry; requires ≥2.2µF ceramic bypass close to PGND. |
| PGND | Power Ground | High-current return path for switch node and inductor; connects directly to ePAD for thermal performance. |
| ePAD | Thermal Pad | Exposed copper pad under package; must be soldered to solid PGND plane for θJC = 63°C/W. |
Key Features
| Feature | Design Value |
|---|---|
| HyperLight Load® Mode | Proprietary discontinuous-mode control maintaining >85% efficiency at 1mA while enabling ultra-fast load transients. |
| Integrated Power Switches | Fully matched PMOS/NMOS with 0.20Ω/0.19Ω RDSON eliminates external MOSFETs and gate drivers. |
| Active Output Discharge | Internal path from SNS to PGND discharges output within milliseconds after disable, preventing floating rail issues. |
| Low-Noise Feedback Architecture | 0.62V reference with <1nA bias current ensures stable regulation even with high-value feedback resistors. |
| Robust Protection Suite | Includes thermal shutdown (160°C), cycle-by-cycle current limit (~2.2A), and UVLO with 75mV hysteresis. |
| Ultra-Small Solution Size | Supports 0.47µH inductor and 2.2µF output capacitor, achieving total height <1mm and footprint <10mm². |
Applications
| SSD Power Management | Smartphone Application Processor Core |
|---|---|
Use Scenario: Regulating core voltage for NAND controller and DRAM interface in embedded SSD modules. IC Role / Device Role / Timing Role: Primary DC/DC converter supplying dynamically scaled VDD_CORE (0.8–1.2V) with fast load-step response. Use Value: HyperLight Load® maintains >85% efficiency during idle states, extending battery life in portable SSD enclosures. | Use Scenario: Delivering clean, tightly regulated power to ARM Cortex-A series CPU cores in LTE smartphones. IC Role / Device Role / Timing Role: High-efficiency buck regulator with programmable soft start coordinating with PMIC sequencing. Use Value: 3MHz operation allows use of tiny 0.47µH inductors, reducing solution height to meet strict Z-axis constraints in slim form factors. |
| Tablet PC I/O Rail | Wi-Fi Module Power Supply |
Use Scenario: Powering high-speed MIPI DSI/CSI interfaces and touch controller in Android tablets. IC Role / Device Role / Timing Role: Adjustable-output buck supplying 1.8V or 2.5V I/O rails with precise ±2.5% accuracy. Use Value: Active discharge via SNS pin ensures rapid rail collapse during suspend-to-RAM transitions, meeting ACPI compliance. | Use Scenario: Providing stable 3.3V supply to IEEE 802.11ac Wi-Fi SoCs in portable hotspots and IoT gateways. IC Role / Device Role / Timing Role: Standalone regulator with PG output synchronized to Wi-Fi module enable timing. Use Value: 94% peak efficiency minimizes thermal dissipation near sensitive RF front-end components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62130ARGTR | 3MHz fixed 3.3V/adjustable output; 2A rating; 17µA IQ; no integrated discharge path. | Lacks active output discharge and HyperLight Load®; lower light-load efficiency (78% @ 1mA). | Preferred where lowest quiescent current is critical and discharge is handled externally. |
| RT8059GJ6F | 3MHz, 2A, adjustable output; 25µA IQ; includes PG but no soft-start programming. | No programmable soft start; fixed 1.2ms soft-start time; higher output ripple at light loads. | Selected when simplified BOM (no external SS cap) outweighs need for precise ramp control. |
Compared with TPS62130ARGTR and RT8059GJ6F, the MIC23155YMT-TR uniquely combines programmable soft start, active discharge, and HyperLight Load®-enabling superior light-load efficiency and faster transient recovery in space-constrained portable designs.
Availability
MIC23155YMT-TR is available at Aetrix Electronics and suitable for solid-state drives (SSD), smartphone application processors, tablet PC I/O rails, Wi-Fi module power supplies, and portable medical monitors requiring stable component supply across extended production lifecycles.
Supply support for MIC23155YMT-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 analog and mixed-signal semiconductor company founded in 1978 and acquired by Microchip Technology in 2015. It specialized in high-performance power management, timing, and interface ICs.
The MIC23155 product line was designed specifically for ultra-compact, high-efficiency DC/DC conversion in battery-powered portable electronics where board area, height, and light-load efficiency are critical constraints.
FAQ
What is the minimum output capacitor value supported by the MIC23155YMT-TR?
The MIC23155YMT-TR is designed to operate stably with an output capacitor as small as 2.2µF. This low requirement enables compact designs using 0603-size X5R/X7R ceramics. Larger capacitance improves load transient response and reduces output ripple but increases solution size and cost. Recommended part: Murata GRM188R60J475KE19D (4.7µF, 0603).
Does the MIC23155YMT-TR support fixed-output voltage configurations?
No - the MIC23155YMT-TR is the adjustable-output variant, requiring an external resistor divider on the FB pin to set VOUT from 0.7V upward. Fixed-output versions (e.g., MIC23155-GYMT) have internal feedback networks and different marking codes (QLG vs. QLA). Using MIC23155YMT-TR with fixed-VOUT configuration will result in incorrect regulation.
How does the MIC23155YMT-TR achieve ultra-fast transient response?
The MIC23155YMT-TR achieves ultra-fast transient response through its HyperLight Load® architecture, which uses minimum-on/off-time control to deliver energy precisely when needed. During light-load transients, it avoids fixed-frequency switching overhead and responds within microseconds. In CCM mode, the 3MHz switching frequency and low-output-impedance design further reduce recovery time to under 10µs for 1A load steps.
What is the function of the SNS pin on the MIC23155YMT-TR?
The SNS pin on the MIC23155YMT-TR serves two functions: (1) it senses the output voltage for regulation feedback in adjustable configurations, and (2) it provides an active discharge path to PGND when EN is pulled low. This dual role eliminates the need for external discharge circuitry and ensures rapid rail collapse during shutdown, critical for system-level power sequencing.
Can the MIC23155YMT-TR be used with input voltages below 2.7V?
No - the MIC23155YMT-TR has a specified minimum input voltage of 2.7V per absolute maximum and operating ratings. Below this threshold, undervoltage lockout (UVLO) disables the regulator. Attempting operation at 2.5V or lower may cause erratic behavior, failure to start, or damage due to insufficient gate drive for internal MOSFETs. Always maintain VIN ≥ 2.7V for guaranteed functionality.
MIC23155YMT-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- HyperLight Load®
- Package/Case:
- 10-UFDFN Exposed Pad, 10-TMLF®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.7V
- Voltage - Output (Max):
- 4.4V
- Current - Output:
- 2A
- Frequency - Switching:
- 3MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-TMLF® (2.5x2.5)
MIC23155YMT-TR FAQ
1.How can I place an order for MIC23155YMT-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC23155YMT-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 MIC23155YMT-TR reliable?
The price and inventory of MIC23155YMT-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC23155YMT-TR is usually 5 days.
3.What payment methods are accepted for MIC23155YMT-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC23155YMT-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC23155YMT-TR?
MIC23155YMT-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC23155YMT-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 MIC23155YMT-TR?
For technical support, including MIC23155YMT-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC23155YMT-TR requirements.
6.How does Aetrix verify that MIC23155YMT-TR is sourced from the original manufacturer or authorized distributors?
All MIC23155YMT-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 MIC23155YMT-TR meets industry standards.
7.What is the process for return or replacement of MIC23155YMT-TR?
All MIC23155YMT-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC23155YMT-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 MIC23155YMT-TR part is unused and in its original packaging.
Return procedure for MIC23155YMT-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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