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Microchip Technology MCP1602-250I/MF
- Part No.:
- MCP1602-250I/MF
- Manufacturer:
- Microchip Technology
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
MCP1602-250I/MF.pdf
- Description:
- IC REG BUCK 2.5V 500MA 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,049
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Product details
Overview
MCP1602-250I/MF from Microchip Technology is a fixed-output 2.5V, 500 mA synchronous buck DC-DC regulator in an 8-lead 3×3 mm DFN package, featuring 2.0 MHz PWM switching, power-good monitoring with 262 ms delay, and operation from 2.7V–5.5V input - ideal for USB-powered portable devices requiring stable low-noise 2.5V rail generation.
For engineers reviewing the MCP1602-250I/MF datasheet, MCP1602-250I/MF pinout, MCP1602-250I/MF application, or MCP1602-250I/MF equivalent, key selection considerations include its fixed 2.5V output, integrated PFM/PWM mode transition, 45 µA quiescent current, thermal/overcurrent/UVLO protection, and compatibility with compact ceramic input/output capacitors and 4.7 µH inductors.
Technical Context
The MCP1602-250I/MF implements a fully integrated synchronous buck topology with internal 450 mΩ P-channel and N-channel MOSFETs, enabling high-efficiency conversion without external switches. Its dual-mode control - fixed-frequency 2.0 MHz PWM under heavy load and pulse-skipping PFM at light load - maintains >90% typical efficiency across 0.1–500 mA output current.
Power-good signaling uses an open-drain PG pin with 94% VOUT high-threshold, 92% VOUT low-threshold, and 2% hysteresis, coupled with a factory-trimmed 262 ms active timeout period. Undervoltage lockout (2.55 V typ, 200 mV hysteresis) and thermal shutdown (150°C, 10°C hysteresis) operate independently of regulation loop timing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5V ±2.5% - eliminates need for external feedback resistors and compensation network |
| Max Output Current | 500 mA continuous - supports single-core microcontrollers and low-power logic rails |
| Input Voltage Range | 2.7V to 5.5V - compatible with 1-cell Li-ion (3.0–4.2V), 3-cell NiMH (3.6V), and USB 5V sources |
| Quiescent Current | 45 µA typical - extends battery life in always-on portable systems |
| Switching Frequency | 2.0 MHz ±20% - enables use of small 4.7 µH inductors and 4.7 µF ceramic capacitors |
| Power-Good Delay | 262 ms typical - ensures system reset stability before asserting processor enable |
| Thermal Shutdown | 150°C junction temperature - protects against sustained overload in confined PCB layouts |
Pinout & Package
Package: 8-lead 3×3 mm DFN with exposed thermal pad (EP), rated θJA = 60°C/W on 4-layer board with 2 vias to AGND plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SHDN | Enable control input | Logic-high (>45% VIN) enables regulator; logic-low (<15% VIN) disables with <0.05 µA shutdown current |
| 2 VCC | Analog bias supply | Internally filtered VIN rail powering error amplifier, reference, and timing circuitry |
| 3 PG | Open-drain power-good output | Asserts low when VOUT drops below 92% of 2.5V; requires external pull-up for host processor reset coordination |
| 4 AGND | Analog ground reference | Separate ground return for feedback and reference circuits; must be tied to EP and low-noise analog plane |
| 5 VOUT | Fixed output voltage node | 2.5V regulated output; connects directly to load and output capacitor - no divider required |
| 6 VIN | Main power input | Accepts 2.7–5.5V; requires ≥4.7 µF low-ESR ceramic capacitor placed near pin |
| 7 LX | Switch node | Connects to inductor; carries high di/dt current - demands short, wide trace to minimize EMI and voltage spikes |
| 8 PGND | Power ground return | High-current return path for LX and internal MOSFETs; must be routed separately from AGND until star point |
Key Features
| Feature | Design Value |
|---|---|
| Automatic PWM-to-PFM mode transition | Enables >90% efficiency at both full load (500 mA) and ultra-light load (100 µA), eliminating manual mode selection |
| Internally compensated control loop | Removes need for external compensation components - reduces BOM count and layout sensitivity |
| Integrated overcurrent protection | 700 mA cycle-by-cycle current limit prevents damage during output shorts or startup into heavy capacitive loads |
| Low-noise 2.0 MHz switching | Places switching harmonics above 10 MHz - simplifies EMI filtering and avoids AM radio band interference |
| Exposed thermal pad (EP) | Provides direct thermal path to PCB ground plane - lowers junction-to-ambient resistance by ~150°C/W vs. MSOP variant |
Applications
| USB-Powered Peripherals | Digital Camera Core Logic |
|---|---|
Use Scenario: Powering FPGA configuration memory and sensor interface ICs from a 5V USB port. IC Role / Device Role / Timing Role: Primary 2.5V point-of-load regulator delivering clean, low-ripple voltage with precise power-good assertion before logic initialization. Use Value: Eliminates need for discrete LDO post-regulation; 45 µA quiescent current minimizes standby drain during USB suspend mode. |
Use Scenario: Supplying image signal processor (ISP) core voltage in compact digital cameras powered by 3×NiMH batteries (~4.2V). IC Role / Device Role / Timing Role: Synchronous buck converter generating stable 2.5V rail with fast transient response to burst-mode sensor readouts. Use Value: 2.0 MHz switching allows use of tiny 3.8×3.8 mm shielded inductors; PG delay ensures reliable ISP reset sequencing after battery insertion. |
| Portable Medical Sensors | Industrial Handheld Terminals |
Use Scenario: Providing regulated 2.5V to precision ADCs and low-power BLE transceivers in battery-operated glucose monitors. IC Role / Device Role / Timing Role: High-efficiency step-down regulator with UVLO and thermal protection ensuring safe operation across -40°C to +85°C ambient range. Use Value: 262 ms PG timeout prevents false wakeups during brief battery voltage sags; 0.05 µA shutdown current preserves shelf life. |
Use Scenario: Generating 2.5V for touch controller and display driver ICs in ruggedized handheld terminals using 1-cell Li-ion batteries. IC Role / Device Role / Timing Role: Fixed-output buck regulator with integrated PFM/PWM control maintaining >88% efficiency from 100 µA to 500 mA load. Use Value: DFN-8 package enables dense layout in space-constrained enclosures; PG signal synchronizes display backlight enable with stable rail establishment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Texas Instruments TPS62231DRYR | Fixed 2.5V output, 300 mA max, 3.6 MHz switching, 17 µA IQ | Limited output current; better suited for ultra-low-power MCU cores than sensor+BLE combos | Select if 300 mA suffices and higher switching frequency justifies tighter layout constraints |
| Analog Devices ADP2302ARDZ-2.5-R7 | Fixed 2.5V output, 600 mA max, 600 kHz switching, 2.5 mA IQ | Lower frequency increases inductor size; higher quiescent current reduces battery runtime | Select only when thermal budget permits larger inductor and 2.5 mA IQ is acceptable for system sleep states |
Compared with TPS62231DRYR and ADP2302ARDZ-2.5-R7, the MCP1602-250I/MF delivers optimal balance of 500 mA capability, 45 µA quiescent current, and 2.0 MHz operation - making it uniquely suitable for USB-powered portable equipment where size, efficiency, and load flexibility are jointly critical.
Availability
MCP1602-250I/MF is available at Aetrix Electronics and suitable for USB-powered peripherals, portable medical sensors, digital camera subsystems, industrial handheld terminals, and battery-backed IoT edge nodes requiring stable component supply and long-term manufacturability.
Supply support for MCP1602-250I/MF 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 design-in support across industrial, automotive, and consumer markets.
The MCP1602 product line delivers highly integrated, low-quiescent-current synchronous buck regulators targeting space-constrained portable electronics powered by single-cell batteries or USB ports.
FAQ
What is the output voltage tolerance of the MCP1602-250I/MF?
The MCP1602-250I/MF has a fixed 2.5V output with ±2.5% tolerance over temperature and line/load conditions, as specified in the DC characteristics table of DS22061A. This tolerance applies across the full operating range of -40°C to +85°C ambient temperature and 2.7V–5.5V input voltage, ensuring reliable logic-level compatibility without post-regulation.
Does the MCP1602-250I/MF require external compensation components?
No, the MCP1602-250I/MF is internally compensated - its control loop stability is guaranteed with standard 4.7 µF input/output capacitors and a 4.7 µH inductor. Unlike adjustable buck regulators, this fixed-output variant eliminates the need for external R-C compensation networks, reducing BOM count and layout complexity.
How does the power-good (PG) function behave during startup and fault conditions?
The MCP1602-250I/MF asserts PG high after a 262 ms delay once VOUT rises above 94% of 2.5V (2.35V). If VOUT falls below 92% (2.3V), PG transitions low within 165 µs. During UVLO, thermal shutdown, or overcurrent events, PG goes open-drain low - providing unambiguous fault signaling to host processors independent of regulation status.
Can the MCP1602-250I/MF operate from a 5V USB source while delivering 500 mA at 2.5V?
Yes - the MCP1602-250I/MF supports 5.0V input and delivers 500 mA at 2.5V with typical efficiency of 92% (per Figure 2-7), resulting in ~125 mW dissipation. With its 60°C/W θJA in the DFN package and proper thermal vias, junction temperature remains safely below 125°C even at +85°C ambient.
What is the minimum input voltage required for the MCP1602-250I/MF to regulate 2.5V output?
The MCP1602-250I/MF requires VIN ≥ 2.7V per absolute specification, and also VIN ≥ VOUT + 0.5V (i.e., ≥3.0V) to maintain regulation under all load conditions. Therefore, stable 2.5V output requires VIN ≥ 3.0V - making it suitable for 3-cell NiMH (3.6V nominal) and 1-cell Li-ion (3.0–4.2V) but not for deeply discharged Li-ion below 3.0V.
MCP1602-250I/MF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-VDFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 500mA
- Frequency - Switching:
- 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (3x3)
MCP1602-250I/MF FAQ
1.How can I place an order for MCP1602-250I/MF through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP1602-250I/MF 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 MCP1602-250I/MF reliable?
The price and inventory of MCP1602-250I/MF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP1602-250I/MF is usually 5 days.
3.What payment methods are accepted for MCP1602-250I/MF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP1602-250I/MF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP1602-250I/MF?
MCP1602-250I/MF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP1602-250I/MF 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 MCP1602-250I/MF?
For technical support, including MCP1602-250I/MF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP1602-250I/MF requirements.
6.How does Aetrix verify that MCP1602-250I/MF is sourced from the original manufacturer or authorized distributors?
All MCP1602-250I/MF 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 MCP1602-250I/MF meets industry standards.
7.What is the process for return or replacement of MCP1602-250I/MF?
All MCP1602-250I/MF units undergo pre-shipment inspection (PSI). If there is an issue with MCP1602-250I/MF, 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 MCP1602-250I/MF part is unused and in its original packaging.
Return procedure for MCP1602-250I/MF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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