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Microchip Technology MCP1602-250I/MS
- Part No.:
- MCP1602-250I/MS
- Manufacturer:
- Microchip Technology
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MCP1602-250I/MS.pdf
- Description:
- IC REG BUCK 2.5V 500MA 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:513
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Product details
Overview
MCP1602-250I/MS from Microchip Technology is a fixed-output 2.5V, 500 mA synchronous buck regulator in MSOP-8 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 devices and single-cell Li-Ion battery systems.
For engineers reviewing the MCP1602-250I/MS datasheet, MCP1602-250I/MS pinout, MCP1602-250I/MS application, or MCP1602-250I/MS equivalent, key selection considerations include its fixed 2.5V output, integrated PFM/PWM mode transition, 45 µA quiescent current, UVLO (2.55V typ), and thermal shutdown at 150°C - all validated for industrial temperature range (–40°C to +85°C).
Technical Context
The MCP1602-250I/MS implements a fully integrated synchronous buck architecture with internal 450 mΩ P-channel and N-channel MOSFETs, enabling high-efficiency DC-DC conversion without external switches. Its dual-mode control logic automatically transitions between fixed-frequency 2.0 MHz PWM (heavy load) and pulse-skipping PFM (light load) to maintain >90% typical efficiency across 0.1–500 mA output current.
Power-good functionality uses an open-drain PG pin with precise 94% VOUT high-threshold and 92% VOUT low-threshold, plus 2% hysteresis and 262 ms active timeout - ensuring reliable system reset sequencing. Protection includes cycle-by-cycle overcurrent limiting (700 mA peak), undervoltage lockout (2.55V typ, 200 mV hysteresis), and thermal shutdown (150°C, 10°C hysteresis).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5V ±2.5% - eliminates need for external feedback resistors and simplifies layout. |
| Max Output Current | 500 mA continuous - supports processor cores, sensors, and USB peripherals without external boost. |
| Input Voltage Range | 2.7V to 5.5V - compatible with 1-cell Li-Ion (3.0–4.2V), 2–3-cell NiMH/NiCd, and USB 5V rails. |
| Quiescent Current | 45 µA typical - extends battery life in always-on portable applications like PDAs and digital cameras. |
| Switching Frequency | 2.0 MHz (typical) - enables use of small 4.7 µH inductors and 4.7 µF ceramic capacitors for compact designs. |
| Power-Good Delay | 262 ms typical timeout - provides stable power validation before system initialization or processor reset release. |
| Operating Temperature | –40°C to +85°C ambient - qualified for industrial and portable consumer equipment environments. |
Pinout & Package
Package: 8-pin MSOP (3.0 mm × 4.9 mm, 0.65 mm pitch), thermally enhanced with exposed pad connected to AGND per layout guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SHDN | Enable/disable logic input | Active-high control: >45% VIN enables regulation; <15% VIN forces shutdown (0.05 µA ISHDN). |
| 2 - VCC | Analog bias supply | Internally derived from VIN; powers error amplifier, reference, and timing circuitry - requires local 0.1 µF bypass. |
| 3 - PG | Open-drain power-good output | Asserts low when VOUT drops below 92% of 2.5V; pulled up externally to enable reset sequencing or status monitoring. |
| 4 - AGND | Analog ground reference | Separate ground node for feedback and reference circuits - must be tied to quiet analog ground plane, not PGND. |
| 5 - VOUT | Fixed-output voltage node | 2.5V regulated output; connects directly to load - no resistor divider required (unlike adjustable variants). |
| 6 - VIN | Main power input | Accepts 2.7–5.5V; requires ≥4.7 µF low-ESR ceramic capacitor placed near pin to suppress switching noise. |
| 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 - routed separately from AGND and joined at single point. |
Key Features
| Feature | Design Value |
|---|---|
| Automatic PWM-to-PFM mode transition | Enables >90% efficiency at light loads (e.g., standby) and low-noise 2.0 MHz operation at full 500 mA - no external control needed. |
| Internally compensated control loop | Eliminates external compensation components (RC network), reducing BOM count and PCB area for fixed-output configurations. |
| Integrated overcurrent protection | 700 mA cycle-by-cycle current limit prevents damage during short-circuit or overload - resets automatically each cycle. |
| Undervoltage lockout with hysteresis | UVLO activates at 2.55V (typ) with 200 mV hysteresis - avoids brown-out oscillation during battery discharge or line sag. |
| Thermal shutdown with auto-recovery | Shuts down at 150°C junction temperature and restarts after ~10°C cooldown - protects against sustained overload or poor heatsinking. |
Applications
| USB-Powered Peripherals | Portable Medical Sensors |
|---|---|
Use Scenario: Powering USB audio interfaces, HID devices, or flash drives from 5V USB bus while maintaining strict EMI limits. IC Role / Device Role / Timing Role: Primary 2.5V step-down regulator delivering clean, regulated power with minimal ripple (<15 mV) at 2.0 MHz switching. Use Value: Enables direct USB bus powering without linear regulator inefficiency; 45 µA quiescent current preserves host battery during suspend. |
Use Scenario: Supplying precision analog front-ends and low-power microcontrollers in handheld glucose meters or pulse oximeters. IC Role / Device Role / Timing Role: Fixed 2.5V rail generator with power-good signaling to synchronize ADC sampling and MCU wake-up after stable power. Use Value: 262 ms PG delay ensures sensor signal chain is fully settled before data acquisition begins - improving measurement accuracy. |
| Industrial Handheld Terminals | Smart Wearable Displays |
Use Scenario: Powering barcode scanners and RFID readers operating from 3.6V Li-Ion batteries with intermittent high-current bursts. IC Role / Device Role / Timing Role: High-efficiency buck converter supporting 500 mA peak loads while maintaining >88% efficiency at 3.6VIN/2.5VOUT. Use Value: Synchronous topology eliminates external Schottky diode; 450 mΩ internal MOSFETs reduce conduction losses and thermal stress. |
Use Scenario: Regulating power for OLED display drivers and touch controllers in fitness bands where board space and battery life are critical. IC Role / Device Role / Timing Role: Compact 2.5V supply with automatic PFM mode extending runtime during display-off periods. Use Value: MSOP-8 footprint (3×4.9 mm) fits tight wearable layouts; 0.05 µA shutdown current minimizes leakage during deep sleep. |
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 TPS62231DRVR | Fixed 2.5V output, 400 mA max, 3 MHz switching, 17 µA IQ - smaller current rating and higher frequency. | Limited to lower-power loads; unsuitable for 500 mA continuous applications like motor drivers or high-speed interfaces. | Select when ultra-low quiescent current and minimal solution size outweigh current capability requirements. |
| Analog Devices ADP2302ARDZ-2.5-R7 | Fixed 2.5V output, 600 mA max, 600 kHz switching, 2.5 mA IQ - higher current but lower frequency and higher quiescent draw. | Better for noise-sensitive analog systems requiring lower EMI; less suitable for space-constrained USB devices due to larger inductor needs. | Prefer when thermal headroom is constrained and lower switching loss is prioritized over PCB area. |
Compared with TPS62231DRVR and ADP2302ARDZ-2.5-R7, the MCP1602-250I/MS uniquely balances 500 mA capability, 2.0 MHz operation, and 45 µA quiescent current in an MSOP-8 package - making it optimal for portable USB/Li-Ion systems needing both performance and efficiency.
Availability
MCP1602-250I/MS is available at Aetrix Electronics and suitable for USB-powered peripherals, portable medical sensors, and industrial handheld terminals requiring stable component supply across production lifecycles.
Supply support for MCP1602-250I/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 leading provider of microcontroller, mixed-signal, analog, and Flash-IP solutions, serving automotive, industrial, consumer, and communications markets with high-reliability silicon and development tools.
The MCP1602 product line delivers highly integrated, low-quiescent-current DC-DC buck regulators optimized for battery-powered and USB-supplied portable electronics - emphasizing efficiency, small footprint, and robust protection features.
FAQ
What is the output voltage tolerance of the MCP1602-250I/MS?
The MCP1602-250I/MS has a fixed 2.5V output with ±2.5% tolerance over temperature and line/load conditions, as specified in the DC characteristics table (DS22061A-page 4). This tolerance applies across the full –40°C to +85°C operating range and ensures compatibility with 2.5V I/O interfaces without additional regulation.
Does the MCP1602-250I/MS require external compensation components?
No, the MCP1602-250I/MS is internally compensated for fixed-output configurations. Unlike adjustable variants, it does not require external RCOMP and CCOMP components - simplifying design and reducing bill-of-materials cost while maintaining loop stability across all operating conditions.
How does the power-good (PG) function behave during startup and fault conditions?
The MCP1602-250I/MS asserts PG high only after VOUT reaches 94% of 2.5V and remains high for ≥262 ms (typical timeout). If VOUT falls below 92% of 2.5V, PG pulls low within 165 µs. During UVLO or thermal shutdown, PG is actively driven low - providing unambiguous system power-status signaling.
What is the maximum recommended PCB copper area for thermal relief on the MSOP-8 package?
For the MCP1602-250I/MS in MSOP-8, Microchip specifies θJA = 211°C/W on a typical 4-layer board with internal ground plane. While the MSOP lacks an exposed thermal pad (unlike the DFN variant), maximizing copper area on PGND and AGND layers - especially under pins 4 (AGND), 8 (PGND), and the LX/VIN region - improves heat dissipation and maintains safe junction temperatures at full 500 mA load.
Can the MCP1602-250I/MS operate from a 5.5V input while delivering 2.5V at 500 mA?
Yes, the MCP1602-250I/MS supports VIN up to 5.5V and delivers 500 mA continuously at 2.5V output. At VIN = 5.5V, efficiency remains >85% (per Figure 2-10), and thermal calculations using θJA = 211°C/W confirm junction temperature stays below 125°C with proper PCB layout - validating full-spec operation across the entire input range.
MCP1602-250I/MS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- 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-MSOP
MCP1602-250I/MS FAQ
1.How can I place an order for MCP1602-250I/MS through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP1602-250I/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 MCP1602-250I/MS reliable?
The price and inventory of MCP1602-250I/MS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP1602-250I/MS is usually 5 days.
3.What payment methods are accepted for MCP1602-250I/MS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP1602-250I/MS transactions.
Note: Certain payment methods may incur a processing fee.
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MCP1602-250I/MS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP1602-250I/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 MCP1602-250I/MS?
For technical support, including MCP1602-250I/MS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP1602-250I/MS requirements.
6.How does Aetrix verify that MCP1602-250I/MS is sourced from the original manufacturer or authorized distributors?
All MCP1602-250I/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 MCP1602-250I/MS meets industry standards.
7.What is the process for return or replacement of MCP1602-250I/MS?
All MCP1602-250I/MS units undergo pre-shipment inspection (PSI). If there is an issue with MCP1602-250I/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 MCP1602-250I/MS part is unused and in its original packaging.
Return procedure for MCP1602-250I/MS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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