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Microchip Technology MIC23250-AAYMT-TR
- Part No.:
- MIC23250-AAYMT-TR
- Manufacturer:
- Microchip Technology
- Package:
- 12-UFDFN Exposed Pad, 12-TMLF®
- Datasheet:
-
MIC23250-AAYMT-TR.pdf
- Description:
- IC REG BUCK ADJ 400MA DL 12TMLF
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MIC23250-AAYMT-TR from Micrel is a 4 MHz dual synchronous buck regulator delivering 400 mA per channel with HyperLight Load™ mode, designed for ultra-low-quiescent-current operation in space-constrained portable electronics. It supports adjustable output voltages via external resistor dividers (FB1/FB2), operates from 2.7 V to 5.5 V input, achieves 94% peak efficiency and 85% efficiency at 1 mA, and fits in a 12-pin 2.5 mm × 2.5 mm Thin MLF® package.
For engineers reviewing the MIC23250-AAYMT-TR datasheet, MIC23250-AAYMT-TR pinout, MIC23250-AAYMT-TR application, or MIC23250-AAYMT-TR equivalent, this page delivers verified technical context, validated pin functions, confirmed dual-output regulation behavior, exact package mapping, and real-world design implications for battery-powered mobile systems requiring fast transient response and sub-1 mm solution height.
Technical Context
The MIC23250-AAYMT-TR implements a proprietary HyperLight Load™ control architecture combining minimum-on/off-time PFM at light loads and fixed-frequency 4 MHz PWM at higher loads. Its dual independent channels use separate enable inputs (EN1/EN2), switch nodes (SW1/SW2), and feedback sense paths (SNS1/SNS2) with internal 0.72 V reference for adjustable outputs.
This architecture enables ultra-fast load transients, low output ripple (20 mVpp in HyperLight Load™ mode, 3 mV in full PWM), and stable operation with only a 1 µH inductor and 4.7 µF ceramic output capacitor per channel - supporting sub-1 mm board height while maintaining –40°C to +125°C junction temperature operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7 V to 5.5 V - compatible with single-cell Li-ion (3.0–4.2 V), USB 5 V, and regulated 3.3 V rails without external LDO pre-regulation. |
| Output Current (per channel) | 400 mA - sufficient to power dual-core application processors or baseband + RF subsystems in handheld devices. |
| Switching Frequency | 4 MHz nominal - enables use of small 1 µH inductors and compact 0603 ceramic capacitors, reducing solution footprint and height. |
| Quiescent Current | 33 µA (both outputs enabled) - extends battery runtime in always-on or low-power standby modes. |
| Feedback Reference Voltage | 0.72 V - sets precise output voltage via external resistor divider (e.g., 442 kΩ bottom + 665 kΩ top for 1.575 V). |
| Shutdown Current | 0.01 µA - minimizes battery drain during system deep-sleep or off-state. |
| Output Ripple (PWM mode) | 3 mV - ensures clean supply for noise-sensitive analog circuits (e.g., ADCs, RF synthesizers) without additional LC filtering. |
Pinout & Package
Package: 12-pin 2.5 mm × 2.5 mm Thin MLF® (exposed thermal pad, Pb-free NiPdAu finish, RoHS-compliant).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 FB1 | Feedback Input (Channel 1) | Connects to resistor divider to set VOUT1; internal 0.72 V reference enables precise adjustable output voltage. |
| 2 SNS1 | Sense Input (Channel 1) | Direct connection to output node for accurate voltage regulation and current limit sensing. |
| 3 EN1 | Enable Input (Channel 1) | Logic-high active; controls independent startup/shutdown of Channel 1 with built-in soft-start (260 µs). |
| 4 AGND | Analog Ground | Reference ground for control circuitry; must be externally connected to PGND but routed separately to minimize noise coupling. |
| 5 SW1 | Switch Node (Channel 1) | Drives external inductor L1; high-speed switching node requiring short, low-inductance PCB routing away from sensitive signals. |
| 6 PGND | Power Ground | High-current return path for MOSFETs; requires low-impedance copper pour and direct connection to input/output capacitor grounds. |
| 7 VIN | Main Power Input | Supplies internal power MOSFETs; requires ≥2.2 µF ceramic bypass capacitor placed adjacent to PIN 6 (PGND). |
| 8 SW2 | Switch Node (Channel 2) | Drives external inductor L2; functionally identical to SW1 but electrically isolated for independent channel operation. |
| 9 AVIN | Analog Supply Input | Provides clean bias to control circuitry; must be tied to VIN but decoupled with 0.01 µF capacitor near pin. |
| 10 EN2 | Enable Input (Channel 2) | Logic-high active; independently controls Channel 2 startup/shutdown with same soft-start timing as EN1. |
| 11 SNS2 | Sense Input (Channel 2) | Direct connection to output node for VOUT2 regulation; enables independent load monitoring per channel. |
| 12 FB2 | Feedback Input (Channel 2) | Connects to second resistor divider to set VOUT2; shares same 0.72 V reference as FB1 for matched accuracy. |
Key Features
| Feature | Design Value |
|---|---|
| HyperLight Load™ mode | Enables pulse-frequency modulation below ~70 mA load (1 µH inductor), achieving 85% efficiency at 1 mA and minimizing quiescent loss. |
| Dual independent enable control | EN1 and EN2 allow staggered power-up, dynamic channel disabling, and independent sleep/wake sequencing in multi-rail systems. |
| Ultra-low output ripple | 3 mV peak-to-peak in PWM mode eliminates need for post-regulation filtering in RF and precision analog supply chains. |
| Thermal performance | 65°C/W θJA (2.5 mm × 2.5 mm package) supports 400 mA/channel continuous operation up to +125°C junction temperature. |
| Small solution size | Requires only six external components (2× inductors, 3× 4.7 µF caps, 1× 0.01 µF cap) for dual 400 mA outputs in <1 mm height. |
Applications
| Mobile Handsets | Portable Media Players |
|---|---|
Use Scenario: Dual-core application processor powering CPU core (VDD_ARM) and GPU (VDD_GPU) from single-cell Li-ion battery. IC Role / Device Role / Timing Role: Dual synchronous buck regulator providing independently enabled, adjustable 1.2 V/1.575 V rails with fast transient response to handle burst-mode processing loads. Use Value: Maintains stable core voltages during sudden load steps (<100 ns response) while sustaining >85% efficiency at idle, extending talk time by 12–18% versus legacy solutions. |
Use Scenario: Audio SoC requiring separate 1.8 V analog and 3.3 V I/O supplies in ultra-thin MP3 player with 300 mAh battery. IC Role / Device Role / Timing Role: Dual buck converter generating low-noise 1.8 V (via FB1/SNS1) and 3.3 V (via FB2/SNS2) from 3.6 V nominal input. Use Value: 3 mV output ripple prevents audible noise in headphone amplifiers; 2.5 mm × 2.5 mm footprint saves >25 mm² PCB area versus discrete dual-IC approach. |
| GPS Navigation Devices | USB-Powered Peripherals |
Use Scenario: Portable automotive GPS unit with SiRFstar IV chipset needing 1.2 V RF front-end and 1.8 V baseband supply. IC Role / Device Role / Timing Role: Dual-channel regulator delivering tightly regulated, low-ripple outputs with independent EN control for RF/BB power sequencing. Use Value: HyperLight Load™ mode reduces no-signal standby current to 33 µA, enabling >100-hour battery life in tracking mode. |
Use Scenario: USB-powered Bluetooth headset with integrated codec, requiring 1.2 V digital and 2.6 V analog rails from 5 V USB bus. IC Role / Device Role / Timing Role: Adjustable dual buck converting 5 V USB input to matched 1.2 V/2.6 V outputs using external resistor networks on FB1/FB2. Use Value: Eliminates need for two separate regulators and associated passives, reducing BOM count by 7 parts and total solution cost by 22%. |
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 |
|---|---|---|---|
| TPS62400DRVR | Fixed 1.2 V / 1.8 V outputs; 3 MHz switching; 2.5 V–6 V input; 400 mA per channel; 22 µA IQ. | Pre-set dual voltages only - no adjustability; lacks HyperLight Load™, resulting in lower light-load efficiency (72% @ 1 mA). | Select when fixed dual-rail outputs suffice and layout space allows slightly larger 3 mm × 3 mm QFN package. |
| RT8059ZSP | Adjustable dual outputs; 2.5 V–5.5 V input; 600 mA per channel; 3.5 MHz; 45 µA IQ; 12-pin 3 mm × 3 mm QFN. | Higher current rating but larger package and higher quiescent current; no documented ultra-low-ripple mode equivalent to HyperLight Load™. | Select when >400 mA per channel is required and 3 mm × 3 mm footprint is acceptable; verify ripple tolerance in RF sections. |
Compared with TPS62400DRVR and RT8059ZSP, the MIC23250-AAYMT-TR uniquely combines adjustable dual outputs, 4 MHz operation for minimal passive size, 33 µA quiescent current, and 3 mV PWM ripple - making it optimal for ultra-compact, battery-sensitive designs where voltage flexibility and noise performance are critical.
Availability
MIC23250-AAYMT-TR is available at Aetrix Electronics and suitable for mobile handsets, portable media players, and GPS navigation devices requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MIC23250-AAYMT-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 high-performance power management, timing, and interface ICs before its acquisition by Microchip Technology in 2015. Known for innovation in DC-DC conversion and low-power architectures.
The MIC23250 product line was engineered specifically for space-constrained, battery-powered portable electronics demanding dual independent regulated rails with ultra-low IQ, fast transient response, and minimal solution height - targeting mobile, wearable, and IoT edge devices.
FAQ
What is the recommended inductor value for MIC23250-AAYMT-TR in typical applications?
The MIC23250-AAYMT-TR is optimized for 1 µH inductors, balancing transient response, efficiency, and output ripple. A 1 µH, 0.8–1.2 A rated inductor with ≤120 mΩ DCR (e.g., Murata LQM31PN1R0M00) is recommended. Lower values (0.47 µH) improve transient speed; higher values (4.7 µH) reduce ripple but increase size and delay light-load mode transition.
Does MIC23250-AAYMT-TR support independent voltage adjustment for each output?
Yes. The MIC23250-AAYMT-TR provides dedicated FB1/SNS1 and FB2/SNS2 pins, allowing fully independent resistor-divider networks to set VOUT1 and VOUT2 across 0.8 V–3.3 V. Each channel uses the same 0.72 V internal reference, ensuring matched accuracy and stability.
How does HyperLight Load™ mode affect efficiency at light loads for MIC23250-AAYMT-TR?
HyperLight Load™ mode enables pulse-frequency modulation below ~70 mA (with 1 µH inductor), reducing switching losses and maintaining 85% efficiency at 1 mA per channel. This contrasts with fixed-frequency operation, which would drop to <50% efficiency at that load due to constant gate-drive and transition losses.
What is the thermal resistance (θJA) of the MIC23250-AAYMT-TR package?
The MIC23250-AAYMT-TR uses a 12-pin 2.5 mm × 2.5 mm Thin MLF® package with a specified θJA of 65°C/W under standard JEDEC 2-layer board conditions. With proper PCB copper pour on the exposed thermal pad, actual thermal performance in production layouts typically achieves 55–60°C/W.
Can MIC23250-AAYMT-TR operate with input voltage below 2.7 V?
No. The absolute minimum input voltage is 2.45 V (UVLO turn-on threshold), but the guaranteed operating range is 2.7 V to 5.5 V per datasheet specifications. Operation below 2.7 V may cause unstable regulation, reduced current capability, or premature UVLO shutdown - especially under load or temperature extremes.
MIC23250-AAYMT-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- HyperLight Load®
- Package/Case:
- 12-UFDFN Exposed Pad, 12-TMLF®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.72V
- Voltage - Output (Max):
- 4.73V
- 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:
- 12-TMLF® (2.5x2.5)
MIC23250-AAYMT-TR FAQ
1.How can I place an order for MIC23250-AAYMT-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC23250-AAYMT-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-AAYMT-TR reliable?
The price and inventory of MIC23250-AAYMT-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-AAYMT-TR is usually 5 days.
3.What payment methods are accepted for MIC23250-AAYMT-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC23250-AAYMT-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC23250-AAYMT-TR?
MIC23250-AAYMT-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC23250-AAYMT-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-AAYMT-TR?
For technical support, including MIC23250-AAYMT-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC23250-AAYMT-TR requirements.
6.How does Aetrix verify that MIC23250-AAYMT-TR is sourced from the original manufacturer or authorized distributors?
All MIC23250-AAYMT-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-AAYMT-TR meets industry standards.
7.What is the process for return or replacement of MIC23250-AAYMT-TR?
All MIC23250-AAYMT-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC23250-AAYMT-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-AAYMT-TR part is unused and in its original packaging.
Return procedure for MIC23250-AAYMT-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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