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Microchip Technology MIC2877-5.25YFT-TR
- Part No.:
- MIC2877-5.25YFT-TR
- Manufacturer:
- Microchip Technology
- Package:
- 8-UQFN
- Datasheet:
-
MIC2877-5.25YFT-TR.pdf
- Description:
- IC REG BOOST 5.25V 8FTQFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MIC2877-5.25YFT-TR from Microchip Technology is a 2 MHz synchronous boost regulator with bidirectional true load disconnect, integrated 6.5A switch, and fixed 5.25V output. It operates from 2.5V–5.5V input, delivers up to 2A continuous output at VIN = 3.0V, and features Power Good (PG), overvoltage protection (6.75V), and ultra-fast transient response - used in USB OTG host power rails and portable high-current reserve supplies.
For engineers reviewing the MIC2877-5.25YFT-TR datasheet, MIC2877-5.25YFT-TR pinout, MIC2877-5.25YFT-TR application, or MIC2877-5.25YFT-TR equivalent, key selection criteria include its fixed 5.25V output, 8-pin FTQFN 2×2 mm package, bidirectional disconnect capability, sub-2 µA shutdown current, and Bypass mode operation when VIN ≥ VOUT.
Technical Context
The MIC2877-5.25YFT-TR implements current-mode PWM control with internal compensation and a 2 MHz oscillator. Its dual-MOSFET power stage includes an NMOS switch (6.5A typical peak limit) and PMOS synchronous rectifier, enabling bidirectional isolation during shutdown and automatic Bypass mode when VIN ≥ VOUT.
It integrates anti-ringing circuitry to suppress SW-node oscillation in DCM, a pre-charge current limiter (0.5A typical at startup), and thermal shutdown at +155°C with +15°C hysteresis. The PG output asserts high when VOUT exceeds 91% of nominal (4.778V for 5.25V version), using open-drain logic requiring external pull-up.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.25V ±1.5% - ensures stable USB-compliant host rail without external feedback components. |
| Input Voltage Range | 2.5V to 5.5V - supports single-cell Li-ion (2.7–4.2V), LiFePO₄, or dual-cell NiMH inputs directly. |
| Max Output Current | 2A continuous at VIN = 3.0V, VOUT = 5.25V - sufficient for dual-port USB OTG or HDMI sink power delivery. |
| Switching Frequency | 2 MHz (1.6–2.4 MHz range) - enables use of compact 1 µH inductors and minimizes EMI in space-constrained portable designs. |
| Shutdown Current | <2 µA typical - preserves battery life in always-on backup power applications during standby. |
| Overvoltage Protection | 6.6–6.75V threshold - latches off to protect downstream 5V logic from fault-induced overvoltage events. |
| Package | 8-pin FTQFN 2 × 2 mm, 0.5 mm pitch - thermally enhanced for high-current density PCB layouts with exposed PGND pad. |
Pinout & Package
Package: 8-pin FTQFN (2 mm × 2 mm, 0.5 mm pitch), thermally enhanced with exposed PGND pad. Pin 1 marked by dot; pin numbering follows standard counter-clockwise sequence starting from top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Input supply connection | Accepts 2.5–5.5V; requires ≥22 µF ceramic bulk cap to PGND for stability under 2A load transients. |
| AGND (Pin 2) | Analog reference ground | Separate low-noise return for internal bias and control circuits; must be star-connected to PGND near IC. |
| PGND (Pin 3) | Power ground return | High-current path for switch node and output capacitor; connects to exposed thermal pad for thermal dissipation. |
| SW (Pin 4) | Switch node | Drives boost inductor; high dv/dt node requiring short, shielded routing away from sensitive analog traces. |
| VOUT (Pin 5) | Regulated output | Delivers fixed 5.25V; requires ≥3 × 22 µF low-ESR ceramic caps to PGND for <200 mV ripple and fast load step recovery. |
| EN (Pin 6) | Enable control | Active-high logic input; internal 2.5 MΩ pull-down; must be tied to VIN via 10 kΩ resistor if not actively driven. |
| VOUTS (Pin 7) | Fixed-output voltage sense | Internally connected to VOUT in fixed versions; provides feedback path for OVP and PG monitoring without external divider. |
| PG (Pin 8) | Power Good indicator | Open-drain output; requires 1 MΩ pull-up to VIN; asserts high when VOUT > 4.778V (91% of 5.25V). |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional true load disconnect | Zero leakage current between VIN and VOUT when EN = GND - prevents battery drain and enables safe hot-swap in portable reserves. |
| Integrated anti-ringing switch | Clamps SW node to VIN at DCM end-of-cycle - reduces EMI emissions by >10 dBµV in 30–100 MHz band without external snubber. |
| Pre-charge current limiting | 0.5A typical limit during VOUT < 0.5V startup - avoids inrush damage to output caps and protects against short-circuit during power-on. |
| Automatic Bypass mode | Enables direct VIN-to-VOUT conduction when VIN ≥ 5.25V - achieves <50 mΩ effective RDS(on) and eliminates switching loss at high input voltages. |
| Pulse Frequency Modulation (PFM) | Engaged at light loads (<100 mA) - maintains >85% efficiency down to 10 µA output current for extended battery runtime. |
Applications
| USB OTG Host Power | Portable Power Reserve |
|---|---|
Use Scenario: Powering USB peripherals (keyboard, mouse, flash drive) from a smartphone or tablet acting as USB host. IC Role / Device Role / Timing Role: Primary 5V boost regulator delivering regulated 5.25V at up to 2A with bidirectional disconnect to isolate battery during suspend. Use Value: Enables full USB 2.0 compliance (5V ±5%) while preventing reverse current into depleted battery cells during peripheral enumeration. |
Use Scenario: Compact external battery pack providing emergency 5V power to smartphones or wearables via USB-C. IC Role / Device Role / Timing Role: High-efficiency step-up converter managing Li-ion cell discharge (2.8–4.2V) to stable 5.25V output with thermal foldback. Use Value: Delivers >93% peak efficiency at 1A load, extending usable capacity by ~12% vs. legacy 1.2 MHz boosters with same inductor/capacitor footprint. |
| Parallel Lithium Cell Backup | HDMI Source Power Rail |
Use Scenario: Dual-cell Li-ion stack (7.2–8.4V) powering a 5V system rail through buck-boost, where MIC2877-5.25YFT-TR handles low-VIN fallback. IC Role / Device Role / Timing Role: Secondary boost stage activated only when main buck-boost drops below 5.25V - ensures uninterrupted 5V supply during deep discharge. Use Value: Bidirectional disconnect prevents backfeed from 5V rail into failing cells; 2 µA shutdown current avoids parasitic drain during long-term storage. |
Use Scenario: Portable HDMI transmitter (e.g., smartphone-to-monitor adapter) requiring clean 5V for HDMI PHY and level shifters. IC Role / Device Role / Timing Role: Dedicated 5.25V LDO-replacement boost rail with ultra-low noise and <100 ns PG assertion delay for HDMI hot-plug detection. Use Value: PG output synchronizes HDMI controller enable timing; Bypass mode eliminates switching artifacts that cause pixel jitter on high-resolution displays. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous boost regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61236PRTJR | Fixed 5.1V output, 3A switch, 2.5 MHz switching, no bidirectional disconnect, higher quiescent current (15 µA) | Lacks true load isolation - unsuitable for battery-backed reserve systems requiring zero reverse leakage | Select when higher output current (3A) is required and bidirectional disconnect is not needed; verify layout compatibility with 1.6 mm × 2.1 mm QFN. |
| MAX17222ATA+T | Adjustable output (0.6–5.5V), 1.2A max, 1.2 MHz, integrated soft-start only - no OVP, PG, or anti-ringing switch | No Power Good signal or overvoltage latch-off - requires external supervision for safety-critical 5V rails | Choose for cost-sensitive, low-current applications where programmability outweighs protection features; confirm thermal derating for 2A loads. |
Compared with TPS61236PRTJR and MAX17222ATA+T, the MIC2877-5.25YFT-TR uniquely combines fixed 5.25V accuracy, bidirectional isolation, and integrated OVP/PG in a 2×2 mm footprint - making it optimal for USB OTG and portable reserve designs where reliability and leakage control are non-negotiable.
Availability
MIC2877-5.25YFT-TR is available at Aetrix Electronics and suitable for USB OTG host power, portable power reserve supplies, and high-current parallel lithium cell applications requiring stable component supply, full lifecycle traceability, and guaranteed long-term availability.
Supply support for MIC2877-5.25YFT-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
Microchip Technology is a U.S.-based semiconductor company specializing in microcontrollers, analog devices, and power management ICs, with broad automotive, industrial, and consumer design-in support.
The MIC2877 family is designed for high-efficiency, space-constrained portable power conversion - targeting USB, HDMI, and battery-reserve applications where bidirectional isolation, fast transient response, and minimal external components are critical.
FAQ
What is the output voltage tolerance of the MIC2877-5.25YFT-TR?
The MIC2877-5.25YFT-TR provides a fixed 5.25V output with ±1.5% tolerance over temperature and line/load conditions. This specification is verified across –40°C to +85°C ambient and ensures compliance with USB 2.0 host voltage requirements. The tolerance derives from internal reference accuracy and process-matched feedback circuitry - no external calibration is required for the MIC2877-5.25YFT-TR.
Does the MIC2877-5.25YFT-TR support automatic Bypass mode, and how does it behave?
Yes, the MIC2877-5.25YFT-TR automatically enters Bypass mode when VIN ≥ VOUT (i.e., VIN ≥ 5.25V). In this state, the NMOS switch turns off and the PMOS synchronous rectifier fully conducts, creating a low-impedance path (<50 mΩ) from input to output. No switching occurs, eliminating ripple and losses - the MIC2877-5.25YFT-TR seamlessly transitions between boost and bypass without output interruption or control latency.
How does the bidirectional true load disconnect function in the MIC2877-5.25YFT-TR?
When EN is pulled low, the MIC2877-5.25YFT-TR disables both MOSFETs and actively blocks the body diode of the PMOS using gate control - achieving <10 nA leakage between VIN and VOUT. This prevents reverse current flow from a charged output capacitor back into a depleted battery, a critical feature for MIC2877-5.25YFT-TR in portable reserve and USB OTG applications where battery longevity is essential.
What is the purpose of the VOUTS pin on the MIC2877-5.25YFT-TR?
The VOUTS pin on the MIC2877-5.25YFT-TR is the dedicated output voltage sensing node for fixed-output variants. Internally connected to VOUT, it feeds the overvoltage protection comparator and Power Good circuitry - enabling accurate OVP triggering at 6.75V and PG assertion at 91% of nominal (4.778V). Unlike adjustable versions that use FB, the MIC2877-5.25YFT-TR requires no external resistors on VOUTS.
Can the MIC2877-5.25YFT-TR operate with input voltage below 2.5V?
No - the MIC2877-5.25YFT-TR has a hard UVLO threshold of 2.29V (typical) with 200 mV hysteresis, and its specified operating range is strictly 2.5V to 5.5V. Operation below 2.5V violates Absolute Maximum Ratings and may result in undefined behavior, including failure to start, unstable regulation, or premature thermal shutdown. The MIC2877-5.25YFT-TR must be powered within its validated input range for guaranteed performance.
MIC2877-5.25YFT-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-UQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 5.25V
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Frequency - Switching:
- 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-FTQFN (2x2)
MIC2877-5.25YFT-TR FAQ
1.How can I place an order for MIC2877-5.25YFT-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC2877-5.25YFT-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 MIC2877-5.25YFT-TR reliable?
The price and inventory of MIC2877-5.25YFT-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC2877-5.25YFT-TR is usually 5 days.
3.What payment methods are accepted for MIC2877-5.25YFT-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC2877-5.25YFT-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC2877-5.25YFT-TR?
MIC2877-5.25YFT-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC2877-5.25YFT-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 MIC2877-5.25YFT-TR?
For technical support, including MIC2877-5.25YFT-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC2877-5.25YFT-TR requirements.
6.How does Aetrix verify that MIC2877-5.25YFT-TR is sourced from the original manufacturer or authorized distributors?
All MIC2877-5.25YFT-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 MIC2877-5.25YFT-TR meets industry standards.
7.What is the process for return or replacement of MIC2877-5.25YFT-TR?
All MIC2877-5.25YFT-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC2877-5.25YFT-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 MIC2877-5.25YFT-TR part is unused and in its original packaging.
Return procedure for MIC2877-5.25YFT-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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