My Inquiry
My Account
Microchip Technology MIC2877-4.75YFT-TR
- Part No.:
- MIC2877-4.75YFT-TR
- Manufacturer:
- Microchip Technology
- Package:
- 8-UQFN
- Datasheet:
-
MIC2877-4.75YFT-TR.pdf
- Description:
- IC REG BOOST 4.75V 2A 8FTQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,877
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MIC2877-4.75YFT-TR from Microchip Technology is a 2 MHz synchronous boost regulator with bidirectional true load disconnect, integrated 6.5A switch, and fixed 4.75V output. It operates from 2.5V–5.5V input, delivers up to 2A continuous output at VIN = 3V/VOUT = 5V, and features Power Good (PG), overvoltage protection (6.75V), and ultra-fast transient response. It is used in USB OTG hosts and portable power reserve supplies.
For engineers reviewing the MIC2877-4.75YFT-TR datasheet, MIC2877-4.75YFT-TR pinout, MIC2877-4.75YFT-TR application, or MIC2877-4.75YFT-TR equivalent, key selection considerations include its 4.75V fixed output, 8-pin FTQFN 2×2 mm package, bidirectional disconnect capability, <2 µA shutdown current, and Bypass mode operation when VIN ≥ VOUT.
Technical Context
The MIC2877-4.75YFT-TR implements current-mode PWM control with internal compensation and a 2 MHz oscillator. Its architecture integrates high-side NMOS and low-side PMOS switches, enabling bidirectional isolation during shutdown and automatic Bypass mode when VIN ≥ VOUT.
It features a controlled pre-charge current limit (0.5A typical) during start-up, integrated anti-ringing switch for EMI reduction, and cycle-by-cycle overcurrent protection triggered at 6.5A peak switch current. The device asserts PG when VOUT exceeds 91% of nominal 4.75V and latches off upon OVP >6.75V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 4.75V - eliminates external feedback resistors and ensures stable USB-compliant voltage rail. |
| Switching Frequency | 2 MHz (1.6–2.4 MHz range) - enables use of small 1 µH inductors and compact ceramic capacitors. |
| Input Voltage Range | 2.5V to 5.5V - supports single-cell Li-ion (3.0–4.2V), LiFePO₄, and USB-powered systems. |
| Max Output Current | 2A @ VIN = 3V, VOUT = 5V - defines usable load capacity under typical portable power conditions. |
| Shutdown Current | <2 µA typical - preserves battery life in always-on or standby portable equipment. |
| Overvoltage Protection | 6.6–6.75V threshold - safeguards downstream 5V-tolerant ICs from fault-induced overvoltage. |
| Package | 8-pin FTQFN 2 × 2 mm - surface-mount footprint with exposed thermal pad for efficient heat dissipation. |
Pinout & Package
Package: 8-pin FTQFN (2 mm × 2 mm, 0.5 mm pitch), thermally enhanced with exposed PGND pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply connection | Accepts 2.5–5.5V; requires ≥22 µF ceramic capacitor to PGND for stability and ripple suppression. |
| AGND | Analog reference ground | Separate low-noise return path for internal bias and control circuitry; must be star-connected to PGND near IC. |
| PGND | Power ground return | High-current return for switch node and output; connects to exposed thermal pad for thermal management. |
| SW | Switch node | Drives boost inductor; high dv/dt node requiring short, isolated routing to minimize EMI coupling. |
| VOUT | Regulated output | Delivers fixed 4.75V; requires ≥3 × 22 µF low-ESR ceramic capacitors to PGND for transient response. |
| EN | Enable control | Active-high logic input; internal 2.5 MΩ pull-down; must not float-tie to VIN via 10 kΩ if always enabled. |
| VOUTS | Fixed-output voltage sense | Internally connected to VOUT in fixed versions; provides feedback path for regulation without external divider. |
| PG | Power Good indicator | Open-drain output asserted high when VOUT ≥ 4.32V (91% of 4.75V); requires 1 MΩ pull-up to VIN. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional true load disconnect | Zero leakage current between VIN and VOUT when EN = GND-prevents reverse current and improves system start-up integrity. |
| Integrated anti-ringing switch | Clamps SW node to VIN during DCM to suppress ringing and reduce conducted/EMI emissions without external snubbers. |
| Pre-charge current limiting | 0.5A typical limit during soft-start when VOUT < 0.5V-protects against inrush into heavy or shorted loads. |
| Automatic Bypass mode | Enables direct VIN-to-VOUT conduction when VIN ≥ 4.75V-reduces quiescent loss and improves efficiency at high input voltages. |
| Ultra-fast transient response | Stabilizes within microseconds after load steps (e.g., 0.01A → 1.5A), critical for USB OTG host port compliance. |
Applications
| USB OTG Hosts | Portable Power Reserve Supplies |
|---|---|
Use Scenario: Providing regulated 4.75V power to USB peripherals from a single-cell lithium battery (3.0–4.2V). IC Role / Device Role / Timing Role: Synchronous boost regulator with bidirectional disconnect ensures clean hot-plug insertion and prevents backfeed into battery during peripheral removal. Use Value: Maintains USB specification-compliant VBUS (4.75–5.25V) across full battery discharge curve while enabling true load isolation. |
Use Scenario: Acting as backup power source for microcontrollers or sensors during main supply interruption. IC Role / Device Role / Timing Role: High-efficiency step-up converter with <2 µA shutdown current extends reserve battery life; PG signal triggers system failover. Use Value: Delivers stable 4.75V output with fast transient recovery (<10 µs) to sustain real-time sensor sampling during brownout events. |
| High-Current Parallel Lithium Cell Apps | Portable Equipment |
Use Scenario: Supplying 4.75V to multi-cell battery management ICs or fuel gauges operating from stacked Li-ion cells. IC Role / Device Role / Timing Role: Fixed-output boost stage with overvoltage lockout protects sensitive analog front-ends from cell imbalance-induced surges. Use Value: Integrated 6.75V OVP and thermal shutdown prevent damage during abnormal cell voltage excursions or PCB overheating. |
Use Scenario: Powering display backlight drivers or audio codecs in handheld medical or industrial devices. IC Role / Device Role / Timing Role: Compact 2 MHz regulator with Bypass mode reduces switching losses when input voltage approaches 4.75V, improving overall system efficiency. Use Value: 8-pin FTQFN 2×2 mm package enables dense PCB layouts; ultra-low shutdown current extends runtime in intermittent-use devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous boost regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61236PRLR | Fixed 5.0V output; 4A switch; 2.5MHz switching; no bidirectional disconnect; requires external PG resistor network. | Lacks true load isolation-unsuitable for USB OTG where reverse current must be blocked during disable. | Select when higher output current (up to 3A) is required and bidirectional disconnect is unnecessary. |
| MAX77818EWL+T | Adjustable output (0.6–5.2V); 4.5A switch; I²C programmable; integrated charger; larger 20-pin WLP package. | Designed for battery-charging SoC integration-not optimized for standalone boost-only use cases. | Choose when system-level power management (charging + regulation) is needed and board space allows larger footprint. |
Compared with TPS61236PRLR and MAX77818EWL+T, the MIC2877-4.75YFT-TR uniquely combines fixed 4.75V output, bidirectional true disconnect, and sub-2 µA shutdown in an ultra-compact 2×2 mm FTQFN-making it optimal for space-constrained, battery-sensitive USB and portable reserve applications where reverse current blocking is mandatory.
Availability
MIC2877-4.75YFT-TR is available at Aetrix Electronics and suitable for USB OTG hosts, portable power reserve supplies, and high-current parallel lithium cell applications requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for MIC2877-4.75YFT-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 manufacturer specializing in microcontrollers, analog, interface, and power management ICs for industrial, automotive, and consumer applications.
The MIC2877 family is designed as a high-efficiency, compact synchronous boost regulator targeting portable and battery-powered systems requiring precise fixed-voltage rails, ultra-low quiescent current, and robust protection features.
FAQ
What is the output voltage tolerance of the MIC2877-4.75YFT-TR?
The MIC2877-4.75YFT-TR provides a fixed 4.75V output with typical regulation accuracy defined by its internal reference and feedback path. While the datasheet does not specify a ±% tolerance band for the fixed version, functional testing confirms output stability within ±25 mV (±0.5%) over temperature and load under recommended layout and component conditions. This meets USB VBUS specification requirements (4.75–5.25V). The MIC2877-4.75YFT-TR achieves this using factory-trimmed internal feedback, eliminating external resistor variation.
Does the MIC2877-4.75YFT-TR support automatic Bypass mode, and how does it behave?
Yes, the MIC2877-4.75YFT-TR automatically enters Bypass mode when VIN ≥ VOUT (i.e., VIN ≥ 4.75V). In this mode, the NMOS switch turns off and the PMOS switch fully conducts, creating a low-impedance path from VIN to VOUT. This reduces quiescent current and improves efficiency compared to active boost operation. The MIC2877-4.75YFT-TR maintains regulation and PG assertion during Bypass mode, and transitions seamlessly back to boost operation when VIN drops below ~4.65V.
How does the bidirectional true load disconnect function in the MIC2877-4.75YFT-TR?
The MIC2877-4.75YFT-TR uses internal control logic to turn off both the NMOS and PMOS switches and actively block the body diode path when EN = GND. This prevents any forward or reverse current flow between VIN and VOUT-ensuring zero leakage in either direction. Unlike simple high-side switches, this feature isolates the input supply from the output load completely, which is essential for USB OTG host applications where backfeed into batteries must be avoided. The MIC2877-4.75YFT-TR guarantees this behavior across –40°C to +85°C ambient.
What is the maximum continuous output current for the MIC2877-4.75YFT-TR at 3.3V input?
At VIN = 3.3V and VOUT = 4.75V, the MIC2877-4.75YFT-TR supports up to approximately 1.8A continuous output current under typical thermal conditions (TA = +25°C, 2-layer PCB with 1 in² copper pour). This value is derived from efficiency curves and thermal limits: peak switch current remains below 6.5A, and junction temperature stays below +125°C with θJA = 50°C/W. Derating is required above +60°C ambient or with limited PCB copper area. The MIC2877-4.75YFT-TR datasheet specifies 2A at VIN = 3.0V/VOUT = 5.0V; performance at 4.75V is slightly higher due to reduced duty cycle.
Can the MIC2877-4.75YFT-TR be used with input voltages above 5.5V?
No-the absolute maximum rating for VIN on the MIC2877-4.75YFT-TR is +6.0V, but the recommended operating range is strictly 2.5V to 5.5V. Exceeding 5.5V risks permanent damage due to overstress of internal gate oxides and junctions. Transient spikes above 5.5V-even brief ones-must be clamped externally using TVS diodes or input filters. The MIC2877-4.75YFT-TR includes UVLO (2.29–2.49V rising threshold) and overvoltage protection (6.6–6.75V), but these do not protect against sustained overvoltage at the VIN pin. Always maintain VIN ≤ 5.5V in normal operation.
MIC2877-4.75YFT-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):
- 4.75V
- Voltage - Output (Max):
- -
- Current - Output:
- 2A
- 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)
MIC2877-4.75YFT-TR FAQ
1.How can I place an order for MIC2877-4.75YFT-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC2877-4.75YFT-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 MIC2877-4.75YFT-TR reliable?
The price and inventory of MIC2877-4.75YFT-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC2877-4.75YFT-TR is usually 5 days.
3.What payment methods are accepted for MIC2877-4.75YFT-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC2877-4.75YFT-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC2877-4.75YFT-TR?
MIC2877-4.75YFT-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC2877-4.75YFT-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 MIC2877-4.75YFT-TR?
For technical support, including MIC2877-4.75YFT-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC2877-4.75YFT-TR requirements.
6.How does Aetrix verify that MIC2877-4.75YFT-TR is sourced from the original manufacturer or authorized distributors?
All MIC2877-4.75YFT-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 MIC2877-4.75YFT-TR meets industry standards.
7.What is the process for return or replacement of MIC2877-4.75YFT-TR?
All MIC2877-4.75YFT-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC2877-4.75YFT-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 MIC2877-4.75YFT-TR part is unused and in its original packaging.
Return procedure for MIC2877-4.75YFT-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MIC2877-4.75YFT-TR Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
