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Microchip Technology MIC2179-5.0YSM
- Part No.:
- MIC2179-5.0YSM
- Manufacturer:
- Microchip Technology
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
MIC2179-5.0YSM.pdf
- Description:
- IC REG BUCK 5V 1.5A 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,055
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Product details
Overview
MIC2179-5.0YSM from Microchip Technology is a 200 kHz synchronous buck (step-down) DC/DC regulator with fixed 5.0 V output, internal 150 mΩ P-channel and N-channel MOSFETs, 1.5 A output capability, and dual-mode PWM/skip operation for up to 96% efficiency. It operates from 4.5 V to 16.5 V input and supports low-dropout operation via 100% duty cycle-ideal for battery-powered laptop and handheld instrument power rails.
For engineers reviewing the MIC2179-5.0YSM datasheet, MIC2179-5.0YSM pinout, MIC2179-5.0YSM application, or MIC2179-5.0YSM equivalent, key selection criteria include its fixed 5.0 V output tolerance (±3%), 600 µA skip-mode quiescent current, 20-lead SSOP package with thermal pad, integrated current-mode control loop, and external PWM/SKIP mode selection logic-critical for noise-sensitive, efficiency-optimized portable designs.
Technical Context
The MIC2179-5.0YSM implements current-mode control with internal current sensing for superior line regulation and simplified loop compensation. Its half-H-bridge switch stage integrates a P-channel high-side and N-channel low-side MOSFET, both rated at 150 mΩ typical RDS(on) at 12 V input, with anti-shoot-through timing and pulse-by-pulse current limiting (4.3 A typ. in PWM mode, 600 mA in skip mode).
It features a dedicated 3.3 V internal bias regulator (BIAS pin), open-drain PWRGD flag with 4.54 V threshold (for 5.0 V output), and SYNC input supporting external clock synchronization from 220 kHz to 300 kHz. Shutdown mode reduces quiescent current to <5 µA, while undervoltage lockout engages at 4.25 V (upper) and 4.15 V (lower) thresholds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±3% (4.85–5.15 V) across 6–16 V input and 10 mA–1 A load-ensures stable rail for USB-peripheral or microcontroller I/O domains. |
| Input Voltage Range | +4.5 V to +16.5 V-supports wide-input industrial batteries and unregulated wall adapters without external pre-regulation. |
| Switching Frequency | 200 kHz preset (±20%)-enables compact magnetics while avoiding AM radio band interference; synchronizable to 220–300 kHz for EMI reduction. |
| Max Output Current | 1.5 A continuous-sufficient for powering core logic, memory, and interface ICs in portable systems. |
| Quiescent Current | 600 µA in skip mode, 1.0 mA in PWM mode, <5 µA in shutdown-extends battery life during light-load or standby states. |
| Thermal Protection | Thermal shutdown activates above +125°C junction temperature, with ~10°C hysteresis-prevents permanent damage under sustained overload or poor heatsinking. |
| Feedback Reference | Internal 1.245 V reference with ±25 mV variation over –40°C to +85°C-enables precise output regulation without external voltage reference. |
Pinout & Package
The MIC2179-5.0YSM is housed in a 20-lead SSOP (Small Outline Package) with exposed thermal pad (SM variant), optimized for surface-mount assembly and thermal dissipation in space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 19, 20 | PGND | Power ground-must be connected to central low-impedance ground plane to minimize switching noise and thermal resistance. |
| 3 | SW | Switch node-connects to inductor and output diode; carries high di/dt current; requires short, wide trace routing. |
| 4, 18 | NC | No internal connection-must remain unconnected per datasheet; no pull-up/down or routing required. |
| 5 | PWM | Mode select input-logic low = PWM mode (≥150 mA loads); logic high = skip mode (<150 mA); must not float. |
| 6 | PWRGD | Open-drain power-good flag-asserts low when FB drops 10% below reference (i.e., VOUT < 4.54 V); requires external pull-up to VIN. |
| 7 | FB | Feedback input-internally tied to 5.0 V output divider; not user-adjustable for MIC2179-5.0YSM variant. |
| 8 | COMP | Error amplifier output-connects to RC compensation network (e.g., 10 kΩ + 4.7 nF) to stabilize control loop. |
| 9–12 | SGND | Signal ground-separate from PGND; connects to feedback, compensation, and BIAS bypass caps to avoid noise coupling. |
| 13 | SYNC | External clock sync input-accepts 220–300 kHz square wave; tie to SGND if unused to disable synchronization. |
| 14 | BIAS | 3.3 V internal bias supply-requires 0.01 µF ceramic capacitor to SGND; zero external load permitted. |
| 15 | EN | Enable input-logic high ≥1.6 V enables regulation; logic low ≤0.8 V forces shutdown with <5 µA IQ. |
| 16, 17 | VIN | Main input supply-both pins must connect directly to input capacitor; shared current path for 1.5 A max input current. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-mode PWM/skip operation | Automatically optimizes efficiency across load range: skip mode delivers >90% efficiency at 10–100 mA, PWM maintains >94% at 500–1500 mA. |
| 100% duty cycle capability | Enables dropout operation down to VIN – VOUT ≈ 0.3 V at 1 A (based on 150 mΩ RDS(on)), critical for battery end-of-life support. |
| Integrated current-mode control | Eliminates need for external current sense resistor; provides inherent cycle-by-cycle current limiting and fast transient response. |
| Low-noise skip mode | Self-oscillating topology with 10 mV hysteresis avoids audible switching noise-essential for audio subsystems and RF modules. |
| Robust protection suite | Includes undervoltage lockout (4.15–4.35 V window), thermal shutdown (>125°C), and pulse-by-pulse current limit (4.3 A PWM / 600 mA skip). |
Applications
| Laptop Power Management | Cellular Baseband Supply |
|---|---|
Use Scenario: Regulating 5.0 V rail for USB peripherals, display backlight drivers, and I/O expander ICs in ultraportable notebooks. IC Role / Device Role / Timing Role: Primary step-down regulator delivering stable 5.0 V from 7–12 V battery or adapter input; manages dynamic load transients during peripheral enumeration. Use Value: Dual-mode operation extends battery runtime by 22% versus fixed-frequency PWM alone at light loads (e.g., sleep state with 20 mA active current). | Use Scenario: Providing clean 5.0 V supply to cellular modem baseband processors and RF front-end bias circuits in smartphones. IC Role / Device Role / Timing Role: Low-noise, high-efficiency buck converter operating in skip mode during idle/standby to minimize RF interference and power consumption. Use Value: 600 µA skip-mode IQ and <5 µA shutdown current reduce system standby power by >40% compared to legacy linear regulators. |
| Handheld Instrument Core Rail | Battery Charger Auxiliary Supply |
Use Scenario: Generating 5.0 V for microcontroller, ADC, and sensor interface circuitry in portable multimeters and oscilloscopes. IC Role / Device Role / Timing Role: Main DC/DC regulator with PWRGD monitoring to ensure valid supply before enabling precision analog signal chain. Use Value: 1.245 V internal reference and tight 5.0 V output tolerance (±3%) maintain ADC reference stability and measurement accuracy across temperature. | Use Scenario: Powering charger controller ICs, status LEDs, and communication interfaces (e.g., SMBus) in multi-cell Li-ion battery chargers. IC Role / Device Role / Timing Role: Secondary regulated supply derived from main charging bus (8–16 V); synchronized via SYNC pin to avoid beat frequencies with primary charger switching. Use Value: 200 kHz fixed frequency and SYNC capability enable deterministic EMI filtering and coexistence with high-frequency charger topologies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2315GJ-Z | Fixed 5.0 V output, 2 MHz switching, 2 A rating, 12-pin QFN; lacks skip mode and PWRGD flag. | Better suited for space-constrained, high-density boards requiring higher frequency and current; unsuitable where low-noise skip mode or power-good signaling is mandatory. | Select MP2315GJ-Z only when board area is critical and 2 MHz operation is acceptable; verify absence of PWRGD does not impact system sequencing. |
| TPS54202DRCT | Adjustable output (0.6–17 V), 500 kHz, 2 A, integrated soft-start; includes Eco-mode (similar to skip) but no dedicated PWRGD pin. | Offers design flexibility for multiple output voltages; Eco-mode provides comparable light-load efficiency but lacks hardware-level power-good assertion. | Choose TPS54202DRCT when output voltage may change across product variants; add external supervisor IC if PWRGD functionality is required. |
Compared with MP2315GJ-Z and TPS54202DRCT, the MIC2179-5.0YSM uniquely combines fixed 5.0 V accuracy, integrated PWRGD, skip-mode noise suppression, and SSOP thermal performance-making it optimal for cost-sensitive, noise-critical, battery-powered applications where layout simplicity and proven reliability outweigh ultra-high-frequency or adjustable-output needs.
Availability
MIC2179-5.0YSM is available at Aetrix Electronics and suitable for laptop computers, cellular telephones, handheld instruments, battery chargers, and high-efficiency battery-powered supplies requiring stable component supply and long-term production continuity.
Supply support for MIC2179-5.0YSM 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 is a global semiconductor company specializing in microcontrollers, analog devices, and power management ICs, with a focus on reliability, longevity, and industrial-grade qualification.
The MIC2179 product line delivers high-efficiency synchronous buck regulators for portable and battery-operated systems, emphasizing low quiescent current, dual-mode operation, and robust protection-designed specifically for applications demanding extended runtime and stable voltage under dynamic load conditions.
FAQ
What is the output voltage tolerance of the MIC2179-5.0YSM over temperature and load?
The MIC2179-5.0YSM delivers a fixed 5.0 V output with ±3% tolerance (4.85 V to 5.15 V) across the full operating temperature range (–40°C to +85°C) and load current range (10 mA to 1 A), as verified in the Electrical Characteristics table on DS20006284B-page 3. This specification holds for input voltages between 6 V and 16 V and reflects the combined effect of internal 1.245 V reference drift and feedback divider accuracy inherent to the fixed-output variant.
Does the MIC2179-5.0YSM require external feedback resistors?
No, the MIC2179-5.0YSM does not require external feedback resistors. Unlike the adjustable MIC2179 variants, this part integrates the feedback divider internally to set a fixed 5.0 V output. Pin 7 (FB) is internally connected to the output divider network and must not be externally modified-any attempt to reconfigure FB will disrupt regulation and void the specified output accuracy.
How does the PWRGD pin function on the MIC2179-5.0YSM?
The PWRGD pin on the MIC2179-5.0YSM is an open-drain output that asserts low when the feedback voltage (FB) falls more than 10% below the internal 1.245 V reference-corresponding to VOUT < 4.54 V for the 5.0 V variant. It sinks up to 0.5 mA and requires an external pull-up resistor to VIN. This signal enables system-level power sequencing and fault detection without additional supervision ICs.
Can the MIC2179-5.0YSM operate with input voltage below 4.5 V?
No, the MIC2179-5.0YSM cannot operate reliably below 4.5 V input due to undervoltage lockout (UVLO). The datasheet specifies UVLO upper threshold at 4.25–4.35 V and lower threshold at 3.90–4.15 V. Below 4.5 V, the device remains disabled; once enabled, it continues regulating until VIN drops below ~4.2 V. Sustained operation below 4.5 V is outside the guaranteed operating range and risks output dropout or erratic behavior.
What is the maximum allowable junction temperature for continuous operation of the MIC2179-5.0YSM?
The MIC2179-5.0YSM has a maximum junction temperature of +125°C for continuous operation, as stated in the Temperature Specifications table on DS20006284B-page 4. Thermal shutdown activates above this threshold, and the device will not resume regulation until junction temperature falls by approximately 10°C. Proper PCB layout-including thermal pad soldering and copper pour-must be implemented to maintain TJ ≤ 125°C under worst-case 1.5 A load and ambient conditions.
MIC2179-5.0YSM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 20-SSOP (0.209", 5.30mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 16.5V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 1.5A
- Frequency - Switching:
- 200kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SSOP
MIC2179-5.0YSM FAQ
1.How can I place an order for MIC2179-5.0YSM through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC2179-5.0YSM 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 MIC2179-5.0YSM reliable?
The price and inventory of MIC2179-5.0YSM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC2179-5.0YSM is usually 5 days.
3.What payment methods are accepted for MIC2179-5.0YSM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC2179-5.0YSM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC2179-5.0YSM?
MIC2179-5.0YSM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC2179-5.0YSM 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 MIC2179-5.0YSM?
For technical support, including MIC2179-5.0YSM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC2179-5.0YSM requirements.
6.How does Aetrix verify that MIC2179-5.0YSM is sourced from the original manufacturer or authorized distributors?
All MIC2179-5.0YSM 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 MIC2179-5.0YSM meets industry standards.
7.What is the process for return or replacement of MIC2179-5.0YSM?
All MIC2179-5.0YSM units undergo pre-shipment inspection (PSI). If there is an issue with MIC2179-5.0YSM, 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 MIC2179-5.0YSM part is unused and in its original packaging.
Return procedure for MIC2179-5.0YSM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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