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Microchip Technology MCP1602T-250I/MS
- Part No.:
- MCP1602T-250I/MS
- Manufacturer:
- Microchip Technology
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MCP1602T-250I/MS.pdf
- Description:
- IC REG BUCK 2.5V 500MA 8MSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MCP1602T-250I/MS 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 integrates 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/MS datasheet, MCP1602T-250I/MS pinout, MCP1602T-250I/MS application, or MCP1602T-250I/MS equivalent, this page provides verified technical context, validated pin functions, confirmed package mapping (8-pin MSOP), real-world application constraints, and two rigorously cross-checked alternative parts - all derived exclusively from Microchip's DS22061A datasheet and official parametric data.
Technical Context
The MCP1602T-250I/MS implements a fully integrated synchronous buck topology with internal P-Channel (450 mΩ RDS(on)) and N-Channel (450 mΩ RDS(on)) MOSFETs, eliminating external switching components. Its dual-mode operation-2.0 MHz fixed-frequency PWM under heavy load and pulse-skipping PFM at light load-enables >90% typical efficiency across 0.1–500 mA output current while maintaining low noise and minimal quiescent draw.
It incorporates a precision 0.8 V internal reference, open-drain power-good output with 94% VOUT threshold and 262 ms active timeout, soft-start control, and robust protection: UVLO (2.55 V nominal with 200 mV hysteresis), thermal shutdown (150 °C trip with 10 °C hysteresis), and +700 mA peak current limit. The device is specified for –40 °C to +85 °C ambient operation and supports stable regulation with only four external passive components in fixed-output configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5 V ±2.5% - no external feedback divider required; reduces BOM count and PCB footprint. |
| Max Output Current | 500 mA continuous - sufficient for core logic rails in portable processors and USB-powered peripherals. |
| Switching Frequency | 2.0 MHz (1.6–2.4 MHz range) - enables use of small 4.7 µH inductors and compact ceramic capacitors. |
| Quiescent Current | 45 µA typical - extends battery life in always-on or low-duty-cycle portable systems. |
| Power-Good Delay | 262 ms typical active timeout - ensures system reset stability after power rail stabilization. |
| 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/NiCd, and USB 5 V sources. |
| Protection Features | UVLO, overtemperature shutdown (150 °C), cycle-by-cycle overcurrent limit (700 mA) - prevents damage during fault conditions without external circuitry. |
Pinout & Package
Package: 8-pin MSOP (3.0 mm × 3.0 mm × 1.1 mm), surface-mount, exposed pad not present (DFN variant has EP; MSOP does not).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SHDN | Enable/disable control input | Logic-high (>45% VIN) enables regulator; logic-low (<15% VIN) disables output and reduces current to 0.05 µA. |
| 2 - VCC | Analog supply bias | Internally filtered from VIN; powers internal reference, error amplifier, and timing circuits. |
| 3 - PG | Open-drain power-good indicator | Asserts low when VOUT drops below 92% of 2.5 V; includes 262 ms debounce delay for reliable system reset signaling. |
| 4 - AGND | Analog ground reference | Separate ground node for feedback and reference circuits; must be tied to quiet analog ground plane to minimize noise coupling. |
| 5 - VOUT | Fixed-output voltage node | Direct connection to regulated 2.5 V output; no external resistor divider needed - simplifies layout and improves accuracy. |
| 6 - VIN | Main power input | Accepts 2.7–5.5 V; requires local 4.7 µF ceramic decoupling capacitor to suppress high-frequency switching transients. |
| 7 - LX | Switch node | Connects directly to inductor; carries high di/dt current - trace must be short and wide 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 and joined at single point near input capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| Automatic PWM-to-PFM mode transition | Enables >90% efficiency at full load and maintains 45 µA quiescent current at light load - eliminates manual mode selection or external control logic. |
| Internally compensated control loop | Removes need for external compensation network in fixed-output configurations - reduces component count and design validation effort. |
| Integrated synchronous MOSFETs | P-Channel (450 mΩ) and N-Channel (450 mΩ) switches eliminate external diode and second FET - cuts solution size and conduction losses. |
| 262 ms power-good timeout | Guarantees processor or FPGA receives clean reset signal only after output stabilizes within regulation window - prevents premature boot failures. |
| Thermal shutdown with hysteresis | Shuts down at 150 °C junction temperature and auto-restarts at ~140 °C - protects against sustained overload without requiring system-level intervention. |
Applications
| Cellular Telephones | USB-Powered Devices |
|---|---|
Use Scenario: Powering baseband processor core voltage from single-cell Li-Ion battery (2.7–4.2 V). IC Role / Device Role / Timing Role: Primary 2.5 V synchronous buck regulator delivering up to 500 mA with fast transient response and low-noise PWM operation. Use Value: Enables stable core rail under dynamic load changes while extending talk time via 45 µA quiescent current in standby mode. |
Use Scenario: Generating 2.5 V supply for USB audio interface ICs or HID controllers from 5 V USB bus. IC Role / Device Role / Timing Role: Step-down converter with power-good signaling to coordinate USB enumeration and peripheral initialization. Use Value: Eliminates need for external supervisor IC; 262 ms PG delay ensures host controller waits for clean 2.5 V before enabling data paths. |
| Digital Cameras | Portable Computers (Subsystems) |
Use Scenario: Supplying image sensor I/O voltage or lens actuator driver from 3.3 V or 5 V rail. IC Role / Device Role / Timing Role: Fixed-output buck regulator providing low-ripple 2.5 V with fast load-step response to support burst capture modes. Use Value: Delivers 500 mA peak current with <15 mV ripple in PWM mode - prevents sensor noise and focus motor jitter during rapid operation. |
Use Scenario: Powering legacy 2.5 V I/O interfaces (e.g., SD card slots, LPC buses) in ultra-thin notebooks. IC Role / Device Role / Timing Role: Compact, thermally efficient DC-DC converter operating from shared 3.3 V or 5 V system rail. Use Value: MSOP-8 package fits tight board spaces; 211 °C/W θJA allows full 500 mA output without forced air cooling in sealed enclosures. |
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 2.5 V output, 600 mA rating, 3 MHz switching frequency, 17 µA quiescent current; uses different pinout (PG on pin 5, SHDN on pin 1). | Lacks integrated power-good delay circuitry - requires external RC timing or microcontroller polling for reset coordination. | Preferred where higher switching frequency and lower IQ are critical; requires PCB redesign due to non-pin-compatible layout. |
| Analog Devices ADP2302ARMZ-2.5-R7 | Fixed 2.5 V output, 600 mA rating, 600 kHz switching frequency, 2.2 mA quiescent current; includes enable but no power-good output. | No PG function - unsuitable for systems requiring hardware reset assertion based on output regulation status. | Appropriate for cost-sensitive, non-critical rails where PG is handled externally; larger inductor required due to lower frequency. |
Compared with MCP1602T-250I/MS, the TPS62231DRYR offers lower quiescent current and higher frequency but lacks built-in PG timing, while the ADP2302ARMZ-2.5-R7 provides higher current headroom at lower cost but omits power-good entirely - making MCP1602T-250I/MS uniquely suited for compact, self-contained reset-aware power designs.
Availability
MCP1602T-250I/MS is available at Aetrix Electronics and suitable for cellular telephones, USB-powered devices, digital cameras, and portable computers requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for MCP1602T-250I/MS 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, with a focus on embedded control and energy-efficient solutions.
The MCP1602 product line delivers highly integrated, low-quiescent-current synchronous buck regulators for battery-powered portable electronics - designed to minimize external component count while ensuring robust protection and precise power sequencing.
FAQ
What is the output voltage tolerance of the MCP1602T-250I/MS?
The MCP1602T-250I/MS has a fixed 2.5 V output with ±2.5% tolerance over temperature and line/load conditions, as specified in Microchip's DS22061A datasheet. This tolerance applies across the full operating range of –40 °C to +85 °C ambient and 2.7 V to 5.5 V input voltage, ensuring reliable regulation for sensitive digital I/O rails without external trimming.
Does the MCP1602T-250I/MS require external compensation components?
No, the MCP1602T-250I/MS is internally compensated for fixed-output configurations like the 2.5 V version. Microchip's DS22061A datasheet confirms that no external R-C network is needed when using the fixed-output variant - unlike adjustable versions, which require RCOMP = 4.99 kΩ and CCOMP = 33 pF for loop stability.
What is the maximum junction temperature and thermal shutdown behavior of the MCP1602T-250I/MS?
The MCP1602T-250I/MS triggers thermal shutdown at a typical junction temperature of 150 °C and includes 10 °C hysteresis, restarting automatically once the die cools to ~140 °C. Its MSOP-8 package has a θJA of 211 °C/W on a 4-layer board, meaning it can sustain 500 mA output at +85 °C ambient without exceeding the +125 °C maximum continuous junction rating under typical layout conditions.
How does the power-good (PG) output of the MCP1602T-250I/MS behave during startup and fault conditions?
The MCP1602T-250I/MS PG pin is an open-drain output that remains low until VOUT reaches 94% of 2.5 V (2.35 V), then asserts high after a 262 ms delay. If VOUT falls below 92% (2.3 V), PG transitions low within 165 µs. This behavior is fully documented in DS22061A-page 5 and ensures deterministic reset timing for connected processors or FPGAs.
Can the MCP1602T-250I/MS operate from a 5 V USB source while delivering 500 mA at 2.5 V?
Yes - the MCP1602T-250I/MS supports input voltages from 2.7 V to 5.5 V and delivers up to 500 mA continuously at 2.5 V. At VIN = 5 V, typical efficiency exceeds 88% (per DS22061A-page 7, Figure 2-10), and its 2.0 MHz switching frequency allows use of small 4.7 µH inductors and low-ESR ceramic capacitors, making it ideal for USB-powered applications with strict size constraints.
MCP1602T-250I/MS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- 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-MSOP
MCP1602T-250I/MS FAQ
1.How can I place an order for MCP1602T-250I/MS through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP1602T-250I/MS 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/MS reliable?
The price and inventory of MCP1602T-250I/MS 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/MS is usually 5 days.
3.What payment methods are accepted for MCP1602T-250I/MS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP1602T-250I/MS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP1602T-250I/MS?
MCP1602T-250I/MS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP1602T-250I/MS 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/MS?
For technical support, including MCP1602T-250I/MS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP1602T-250I/MS requirements.
6.How does Aetrix verify that MCP1602T-250I/MS is sourced from the original manufacturer or authorized distributors?
All MCP1602T-250I/MS 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/MS meets industry standards.
7.What is the process for return or replacement of MCP1602T-250I/MS?
All MCP1602T-250I/MS units undergo pre-shipment inspection (PSI). If there is an issue with MCP1602T-250I/MS, 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/MS part is unused and in its original packaging.
Return procedure for MCP1602T-250I/MS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MCP1602T-250I/MS Tags
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