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Microchip Technology MCP1602T-250I/MF
- Part No.:
- MCP1602T-250I/MF
- Manufacturer:
- Microchip Technology
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
MCP1602T-250I/MF.pdf
- Description:
- IC REG BUCK 2.5V 500MA 8DFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MCP1602T-250I/MF from Microchip Technology is a 2.0 MHz, 500 mA synchronous buck regulator with fixed 2.5 V output, power-good monitoring, and automatic PWM-to-PFM mode transition. It operates from 2.7 V to 5.5 V input, delivers up to 500 mA continuous current, features 45 µA typical quiescent current, and includes undervoltage lockout (UVLO), overtemperature protection, and cycle-by-cycle overcurrent limiting. It is designed for space-constrained portable electronics powered by single-cell Li-Ion or multi-cell NiMH/NiCd batteries.
For engineers reviewing the MCP1602T-250I/MF datasheet, MCP1602T-250I/MF pinout, MCP1602T-250I/MF application, or MCP1602T-250I/MF equivalent, this page provides verified technical context, confirmed pin functions, real-world application mappings, validated alternative parts, and supply-chain support details specific to the 2.5 V fixed-output variant in 3×3 DFN-8 package.
Technical Context
The MCP1602T-250I/MF implements a fully integrated synchronous buck topology with internal P- and N-channel MOSFETs (RDS(on) = 450 mΩ each), enabling high efficiency (>90% typical) across load ranges without external switches. Its dual-mode operation-2.0 MHz fixed-frequency PWM under heavy loads and pulse-skipping PFM at light loads-minimizes quiescent current while maintaining low output ripple (10–15 mV typical) and fast transient response.
Power-good signaling uses an open-drain PG output with 94% VOUT threshold (typical), 2% hysteresis, and 262 ms active timeout delay, ensuring reliable system reset coordination. Protection features include UVLO (2.55 V nominal with 200 mV hysteresis), thermal shutdown at 150 °C (10 °C hysteresis), and 700 mA peak current limiting-each independently verified in the DS22061A datasheet.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5 V ±2.5% - eliminates need for external feedback resistors and simplifies layout. |
| Max Output Current | 500 mA continuous - supports core logic rails in portable processors and USB-powered peripherals. |
| Switching Frequency | 2.0 MHz (1.6–2.4 MHz range) - enables use of compact 4.7 µH inductors and small ceramic capacitors. |
| Quiescent Current | 45 µA typical - extends battery life in always-on or low-duty-cycle applications like PDAs and digital cameras. |
| Power-Good Delay | 262 ms typical timeout - prevents premature system wake-up during slow-ramping power supplies. |
| Input Voltage Range | 2.7 V to 5.5 V - compatible with 1-cell Li-Ion (2.7–4.2 V), 2/3-cell NiMH (2.4–4.5 V), and USB 5 V sources. |
| Thermal Shutdown | 150 °C junction temperature - protects against sustained overload or poor PCB thermal design. |
Pinout & Package
The MCP1602T-250I/MF is housed in an 8-pin 3×3 mm DFN package with exposed thermal pad (EP), optimized for high-power-density portable designs. The EP must be soldered to AGND via multiple vias for effective heat dissipation (θJA = 60 °C/W on 4-layer board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SHDN | Enable/disable control input | Logic-high (>45% VIN) enables regulation; logic-low (<15% VIN) disables output and reduces current draw to 0.05 µA. |
| 2 VCC | Analog bias supply | Internally derived from VIN; powers internal reference, error amplifier, and timing circuitry. |
| 3 PG | Open-drain power-good output | Asserts low when VOUT falls below 92% of 2.5 V; requires external pull-up for system reset signaling. |
| 4 AGND | Analog ground reference | Separate ground node for feedback and reference circuits; must be tied to quiet analog ground plane. |
| 5 VOUT | Regulated output voltage | Fixed 2.5 V output terminal; connects directly to load and output capacitor (4.7 µF min). |
| 6 VIN | Main power input | Accepts 2.7–5.5 V; requires local 4.7 µF low-ESR ceramic capacitor for stability and noise suppression. |
| 7 LX | Switch node | Connects to inductor; carries high di/dt switching current; requires short, wide trace to minimize EMI. |
| 8 PGND | Power ground return | High-current return path for LX and internal MOSFETs; must be routed separately from AGND and joined at single point. |
| EP | Exposed thermal pad | Electrically connected to AGND; mandatory for thermal performance-requires ≥4 thermal vias to inner AGND plane. |
Key Features
| Feature | Design Value |
|---|---|
| Automatic PWM-to-PFM mode transition | Enables >90% efficiency at full load and 45 µA quiescent current at light load-no external control required. |
| Internally compensated control loop | Eliminates need for external compensation components, reducing BOM count and layout complexity. |
| Integrated synchronous MOSFETs | P- and N-channel switches (450 mΩ RDS(on)) reduce conduction loss and eliminate external diode. |
| 262 ms power-good timeout | Ensures stable VOUT before asserting system reset-prevents false starts during brown-out recovery. |
| Undervoltage lockout with hysteresis | 2.55 V turn-on threshold with 200 mV hysteresis prevents oscillation near battery depletion voltage. |
Applications
| Cellular Telephones | USB-Powered Devices |
|---|---|
|
Use Scenario: Powering baseband processor core voltage from single-cell Li-Ion battery (3.0–4.2 V). IC Role / Device Role / Timing Role: Primary 2.5 V synchronous buck regulator delivering up to 500 mA with tight line/load regulation. Use Value: Maintains regulated 2.5 V output across full battery discharge curve while drawing only 45 µA quiescent current during idle states. |
Use Scenario: Generating 2.5 V rail for USB peripheral ICs (e.g., USB-to-serial bridges, HID controllers) from 5 V USB bus. IC Role / Device Role / Timing Role: Step-down converter with fast transient response and low-noise 2.0 MHz switching for noise-sensitive digital interfaces. Use Value: Delivers clean 2.5 V at full load with <15 mV ripple, eliminating need for post-regulation LDOs and saving board space. |
| Digital Cameras | Portable Computers |
|
Use Scenario: Supplying image sensor I/O interface or flash memory controller from 3.7 V Li-Ion battery. IC Role / Device Role / Timing Role: Fixed-output buck regulator with power-good signal used to coordinate sensor initialization sequence. Use Value: 262 ms PG delay ensures camera firmware waits until stable 2.5 V is established before accessing memory or sensors. |
Use Scenario: Providing 2.5 V auxiliary rail for keyboard controller, touchpad, or embedded security module in sub-notebook designs. IC Role / Device Role / Timing Role: Compact, thermally efficient DC-DC converter in space-limited 3×3 mm DFN package. Use Value: 60 °C/W θJA enables operation at full 500 mA load without thermal derating on standard 4-layer PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRYR | 2.0 V fixed output (not 2.5 V); 3.6 V max input; 400 mA max output; 1.8 MHz switching frequency. | Requires redesign for 2.5 V requirement; lower current capability limits use in higher-power peripherals. | Select only if 2.0 V rail suffices and input stays ≤3.6 V; verify PG timing compatibility with host MCU. |
| RT8059GJ6 | Adjustable output (0.6–5.5 V); 5.5 V max input; 600 mA max output; no integrated PG output. | Lacks power-good signal-requires external supervisor IC for reset coordination; adds BOM cost and footprint. | Choose when adjustable output is needed and PG can be implemented externally; confirm loop compensation for 2.5 V setting. |
Compared with MCP1602T-250I/MF, TPS62231DRYR offers lower quiescent current (18 µA) but cannot deliver 2.5 V natively, while RT8059GJ6 supports higher current and wider output range but removes the integrated PG function-making MCP1602T-250I/MF uniquely suited for 2.5 V systems requiring guaranteed power sequencing.
Availability
MCP1602T-250I/MF is available at Aetrix Electronics and suitable for cellular telephones, USB-powered devices, and digital cameras requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance across production batches.
Supply support for MCP1602T-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 manufacturer specializing in microcontrollers, analog devices, and power management ICs for embedded, automotive, and industrial markets.
The MCP1602 product line delivers highly integrated, low-quiescent-current synchronous buck regulators targeting battery-powered portable electronics where efficiency, small size, and reliable power sequencing are critical.
FAQ
What is the output voltage tolerance of the MCP1602T-250I/MF?
The MCP1602T-250I/MF has a fixed 2.5 V output with ±2.5% tolerance over temperature and load, as specified in the DS22061A datasheet. This means the actual output remains within 2.4375 V to 2.5625 V under all operating conditions (–40°C to +85°C ambient, 0.1–500 mA load), ensuring compatibility with 2.5 V logic families without additional regulation.
Does the MCP1602T-250I/MF require external compensation components?
No, the MCP1602T-250I/MF is internally compensated and does not require external RC networks for loop stability. This is confirmed in Section 4.1 and Table 5-1 of the DS22061A datasheet, which states "internally compensated" and lists no compensation components in the fixed-output typical application circuit-reducing design risk and BOM count.
What is the maximum junction temperature rating for the MCP1602T-250I/MF?
The MCP1602T-250I/MF has a maximum continuous junction temperature of +125°C and a thermal shutdown threshold of +150°C (with 10°C hysteresis). These values are explicitly stated in the "Temperature Specifications" table (DS22061A-page 6) and apply to both MSOP and DFN packages-including the MCP1602T-250I/MF's 3×3 DFN variant.
Can the MCP1602T-250I/MF operate from a 5 V USB source?
Yes, the MCP1602T-250I/MF supports input voltages from 2.7 V to 5.5 V, making it fully compatible with standard 5 V USB power. Its 2.0 MHz switching frequency allows use of small 4.7 µH inductors and 4.7 µF ceramic capacitors, and its 262 ms power-good delay ensures safe initialization of downstream USB peripherals after bus enumeration.
How does the power-good (PG) output behave during startup and dropout?
The MCP1602T-250I/MF's open-drain PG output remains low until VOUT rises above 94% of 2.5 V (2.35 V), then asserts high after a 262 ms timeout. When VOUT falls below 92% of 2.5 V (2.30 V), PG transitions low within 165 µs. This behavior is documented in DS22061A-page 5 (PG Threshold High/Low) and page 12 (Figure 4-1 timing diagram).
MCP1602T-250I/MF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-VDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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)
MCP1602T-250I/MF FAQ
1.How can I place an order for MCP1602T-250I/MF through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP1602T-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 MCP1602T-250I/MF reliable?
The price and inventory of MCP1602T-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 MCP1602T-250I/MF is usually 5 days.
3.What payment methods are accepted for MCP1602T-250I/MF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP1602T-250I/MF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP1602T-250I/MF?
MCP1602T-250I/MF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP1602T-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 MCP1602T-250I/MF?
For technical support, including MCP1602T-250I/MF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP1602T-250I/MF requirements.
6.How does Aetrix verify that MCP1602T-250I/MF is sourced from the original manufacturer or authorized distributors?
All MCP1602T-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 MCP1602T-250I/MF meets industry standards.
7.What is the process for return or replacement of MCP1602T-250I/MF?
All MCP1602T-250I/MF units undergo pre-shipment inspection (PSI). If there is an issue with MCP1602T-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 MCP1602T-250I/MF part is unused and in its original packaging.
Return procedure for MCP1602T-250I/MF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MCP1602T-250I/MF Tags
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