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Microchip Technology MIC23603YML-T5
- Part No.:
- MIC23603YML-T5
- Manufacturer:
- Microchip Technology
- Package:
- 20-VFDFN Exposed Pad
- Datasheet:
-
MIC23603YML-T5.pdf
- Description:
- IC REG BUCK ADJ 6A 20DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,524
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Product details
Overview
MIC23603YML-T5 from Microchip Technology is a high-efficiency, 4 MHz synchronous buck regulator delivering up to 6 A output current with HyperLight Load® mode. It operates from 2.7 V to 5.5 V input, supports adjustable output down to 0.65 V, and integrates fully matched PMOS/NMOS power switches in a thermally enhanced 20-pin 4 mm × 5 mm DFN package. It is engineered for core voltage regulation in FPGA and microprocessor point-of-load (POL) systems.
For engineers reviewing the MIC23603YML-T5 datasheet, MIC23603YML-T5 pinout, MIC23603YML-T5 application, or MIC23603YML-T5 equivalent, key selection considerations include its 24 µA quiescent current, 93% peak efficiency at full load, ultra-fast transient response under 20 µs load steps, and programmable soft-start via external capacitor - all critical for low-power embedded and high-dynamic-load digital supply designs.
Technical Context
The MIC23603YML-T5 implements a proprietary HyperLight Load® control architecture combining minimum-on/off-time PFM operation at light loads (<300 mA) with fixed-frequency 4 MHz PWM in continuous conduction mode (CCM). Its dual-domain power supply separates PVIN (switching MOSFET driver) and AVIN (analog control logic), decoupled via a 10 Ω resistor to suppress noise coupling.
It features an integrated error amplifier comparing FB voltage against a 0.62 V internal reference, programmable output via external resistor divider, and real-time current sensing through the SNS pin. Protection includes thermal shutdown at 160°C, cycle-by-cycle current limiting (12 A typical), and undervoltage lockout with 270 mV hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7 V to 5.5 V - supports single-cell Li-ion, USB 5 V, and industrial 3.3 V/5 V rails without pre-regulation. |
| Output Current | 6 A continuous - enables direct core powering of mid-range FPGAs and application processors without parallel devices. |
| Switching Frequency | 4 MHz nominal in CCM - allows use of sub-1 µH inductors (e.g., 0.33 µH) and compact 47 µF ceramic output capacitors. |
| Quiescent Current | 24 µA typical - sustains >81% efficiency at 1 mA load, critical for always-on system standby domains. |
| Feedback Reference | 0.62 V ±1.2% - sets precise output voltage via external resistor divider; enables 0.65 V to 3.6 V adjustment range. |
| Output Ripple | 5 mVPP in full PWM mode - meets tight analog supply requirements without additional LDO post-regulation. |
| Junction Temp Range | –40°C to +125°C - qualified for automotive under-hood and industrial control cabinet environments. |
Pinout & Package
Package: 20-pin, 4 mm × 5 mm DFN with exposed thermal pad (EP = PGND). Pin pitch is 0.5 mm; land pattern follows Microchip specification DS20005636A-page 19.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (Pins 1,2,9,10,11,12,19,20) | Power switch node | Connects directly to inductor; carries high di/dt switching current - requires short, wide copper pour and isolation from sensitive analog traces. |
| PVIN (Pins 3,13,14,18) | Power input supply | Bypassed with ≥10 µF ceramic cap to PGND; powers internal high-side PMOS and gate drivers. |
| EN (Pin 5) | Enable control input | Logic-high (>0.8 V) activates regulator; logic-low (<0.4 V) reduces supply current to 0.01 µA - must not be left floating. |
| SNS (Pin 6) | Output voltage sense | High-accuracy remote sensing point - connect directly to output capacitor anode to reject PCB IR drop. |
| FB (Pin 7) | Feedback input | Compares divided output voltage against 0.62 V reference; sets regulated output via R3/R4 divider per Equation 4-2. |
| SS (Pin 15) | Soft-start timing | External capacitor (≥2.2 nF) sets output ramp time (~1.2 ms typical); prevents inrush current and overshoot during startup. |
| PG (Pin 4) | Power-good indicator | Open-drain output asserting high when VOUT ≥ 90% of nominal - requires external pull-up to VOUT (RPULLUP > 5 kΩ). |
| AVIN (Pin 17) | Analog supply input | Powered via 10 Ω resistor from PVIN; supplies bias circuitry - bypass with 1 µF ceramic cap to AGND. |
| AGND (Pins 8,16) | Analog ground reference | Separate low-noise return for FB, SS, PG, AVIN - tie to central star ground point, optionally with 3 Ω resistor to PGND. |
| PGND (EP) | Power ground return | High-current return path for inductor freewheeling current - minimize loop area and avoid sharing with AGND traces. |
Key Features
| Feature | Design Value |
|---|---|
| HyperLight Load® mode | Enables PFM operation below ~300 mA, maintaining >81% efficiency at 1 mA while delivering ultra-fast transient response (<20 µs). |
| Fully integrated power stage | Eliminates external high-side PMOS and low-side NMOS - reduces BOM count, layout complexity, and footprint by >30% vs discrete solutions. |
| Programmable soft-start | Adjustable rise time via external SS capacitor (e.g., 2.2 nF → ~1.2 ms) - prevents output overshoot and inrush stress on downstream ICs. |
| Low-noise dual-supply architecture | Independent PVIN/AVIN domains with 10 Ω isolation resistor suppress switching noise injection into feedback and control circuits. |
| Robust protection suite | Includes thermal shutdown (160°C), overcurrent limit (12 A typ), UVLO (2.5 V turn-on), and power-good monitoring - ensures reliable operation across industrial temperature range. |
Applications
| 5V POL Supplies | µC/µP, FPGA and DSP Power |
|---|---|
Use Scenario: Local DC/DC conversion from 5 V main rail to 1.2 V–3.3 V core I/O voltages in space-constrained edge nodes. IC Role / Device Role / Timing Role: Primary synchronous buck regulator supplying processor core, memory I/O, and peripheral logic rails. Use Value: Delivers 6 A at 93% efficiency in 20 mm² footprint, enabling sub-1 mm solution height with 0.33 µH inductor and 47 µF output capacitor. | Use Scenario: Dynamic voltage scaling for Xilinx Artix-7 FPGA or ARM Cortex-A53 SoC requiring fast load-step response. IC Role / Device Role / Timing Role: Core voltage regulator with HyperLight Load® enabling seamless transition between active and low-power states. Use Value: Achieves <20 µs recovery from 100 mA ↔ 6 A load transients while maintaining <5 mVPP ripple in PWM mode. |
| Test and Measurement Systems | Networking Systems |
Use Scenario: Precision analog supply generation for ADC/DAC front-ends and signal chain amplifiers in portable scopes. IC Role / Device Role / Timing Role: Low-noise, low-ripple POL regulator feeding sensitive analog subsystems. Use Value: 5 mVPP output ripple in full PWM mode and 24 µA quiescent current preserve SNR and extend battery runtime. | Use Scenario: Compact 12 V-to-3.3 V conversion for Ethernet PHYs, packet processors, and PoE-powered switches. IC Role / Device Role / Timing Role: High-density POL regulator supporting multiple voltage rails in multi-layer networking PCBs. Use Value: 4 mm × 5 mm DFN package with thermal EP enables >4 W dissipation in constrained thermal zones without heatsinks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2365DJ-LF-Z | 4.5 V–24 V input; 5 A output; 500 kHz–1.5 MHz adjustable frequency; no HyperLight Load®; 30 µA IQ | Better suited for higher-input industrial rails; lacks ultra-low-IQ light-load optimization | Select when input exceeds 5.5 V or when lower cost outweighs efficiency at light loads |
| TPS546B24RVFT | 4.5 V–18 V input; 10 A output; PMBus interface; 1.2 MHz fixed frequency; 25 µA IQ | Supports digital telemetry and dynamic voltage scaling; larger 4.5 mm × 3.5 mm QFN package | Select when system-level telemetry, sequencing, or >6 A current is required |
Compared with MP2365DJ-LF-Z and TPS546B24RVFT, the MIC23603YML-T5 uniquely balances ultra-high light-load efficiency (81% @ 1 mA), 4 MHz switching for miniaturization, and 6 A capability in a 20-pin DFN - making it optimal for battery-sensitive, space-constrained FPGA and microcontroller POL designs where input stays within 2.7–5.5 V.
Availability
MIC23603YML-T5 is available at Aetrix Electronics and suitable for 5V POL supplies, µC/FPGA power delivery, and test-and-measurement equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MIC23603YML-T5 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, serving automotive, industrial, consumer, and communications markets with high-reliability silicon and development tools.
The MIC23603 product line delivers high-efficiency, high-frequency synchronous buck regulators optimized for space-constrained, dynamically loaded digital systems - specifically targeting FPGA, microprocessor, and ASIC core voltage regulation with minimal external components.
FAQ
What is the recommended input capacitor for MIC23603YML-T5?
A minimum 10 µF X5R/X7R ceramic capacitor placed close to the PVIN and PGND pins is required. The TDK C1608X5R0J106K (0603, 10 µF) is recommended for optimal high-frequency bypassing, size, and cost. Y5V capacitors are not advised due to capacitance loss over temperature and increased ESR at high frequencies. This ensures stable operation and minimizes input ripple seen by the MIC23603YML-T5.
How does HyperLight Load® mode improve efficiency in MIC23603YML-T5?
HyperLight Load® mode enables pulse-frequency modulation (PFM) at light loads (<300 mA), where the MIC23603YML-T5 only switches when needed to maintain regulation. This eliminates unnecessary switching losses and reduces gate drive current, achieving 81% efficiency at 1 mA output - far exceeding standard PWM-only regulators. The MIC23603YML-T5 transitions seamlessly to 4 MHz PWM above ~300 mA for optimal heavy-load performance.
Can MIC23603YML-T5 be used with a 0.33 µH inductor?
Yes - the MIC23603YML-T5 is explicitly designed for inductors from 0.33 µH to 1 µH. A 0.33 µH inductor yields the fastest load transient response and smallest solution size, while maintaining stability with ≥47 µF ceramic output capacitance. Peak inductor current is calculated per Equation 5-1 and must remain below the inductor's saturation rating. The MIC23603YML-T5's 4 MHz operation makes this low-inductance value practical and effective.
What is the function of the AVIN pin on MIC23603YML-T5?
The AVIN pin supplies power to the MIC23603YML-T5's analog control circuitry (error amplifier, reference, soft-start timer). It must be connected to PVIN through a 10 Ω resistor to isolate switching noise, and bypassed with a 1 µF ceramic capacitor to AGND. This separation prevents PVIN ripple from modulating the feedback loop, ensuring stable regulation and low output voltage drift - a key design distinction of the MIC23603YML-T5.
Does MIC23603YML-T5 support adjustable output voltage?
Yes - the MIC23603YML-T5 supports adjustable output from 0.65 V to 3.6 V using an external resistor divider connected between VOUT, FB, and AGND. The internal 0.62 V reference is compared to the FB voltage; output is set by R3/R4 per Equation 4-2. Table 4-1 provides example values (e.g., 1.8 V uses 560 kΩ/294 kΩ). Fixed-output variants exist, but MIC23603YML-T5 is the adjustable version with FB pin enabled.
MIC23603YML-T5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- HyperLight Load®
- Package/Case:
- 20-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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):
- 0.65V
- Voltage - Output (Max):
- 3.6V
- Current - Output:
- 6A
- Frequency - Switching:
- 4MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-DFN (4x5)
MIC23603YML-T5 FAQ
1.How can I place an order for MIC23603YML-T5 through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC23603YML-T5 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 MIC23603YML-T5 reliable?
The price and inventory of MIC23603YML-T5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC23603YML-T5 is usually 5 days.
3.What payment methods are accepted for MIC23603YML-T5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC23603YML-T5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC23603YML-T5?
MIC23603YML-T5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC23603YML-T5 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 MIC23603YML-T5?
For technical support, including MIC23603YML-T5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC23603YML-T5 requirements.
6.How does Aetrix verify that MIC23603YML-T5 is sourced from the original manufacturer or authorized distributors?
All MIC23603YML-T5 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 MIC23603YML-T5 meets industry standards.
7.What is the process for return or replacement of MIC23603YML-T5?
All MIC23603YML-T5 units undergo pre-shipment inspection (PSI). If there is an issue with MIC23603YML-T5, 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 MIC23603YML-T5 part is unused and in its original packaging.
Return procedure for MIC23603YML-T5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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