My Inquiry
My Account
Microchip Technology MCP1603-250I/MC
- Part No.:
- MCP1603-250I/MC
- Manufacturer:
- Microchip Technology
- Package:
- 8-VFDFN Exposed Pad
- Datasheet:
-
MCP1603-250I/MC.pdf
- Description:
- IC REG BUCK 2.5V 500MA 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,061
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MCP1603-250I/MC from Microchip Technology is a fixed-output 2.5 V, 500 mA synchronous buck regulator optimized for single-cell Li-Ion and multi-cell NiMH/NiCd battery-powered portable electronics. It operates from 2.7 V to 5.5 V input, delivers >90% typical efficiency at full load, features 2.0 MHz PWM switching, and integrates P-channel and N-channel MOSFETs in a space-saving 5-lead TSOT package.
For engineers reviewing the MCP1603-250I/MC datasheet, MCP1603-250I/MC pinout, MCP1603-250I/MC application, or MCP1603-250I/MC equivalent, key selection criteria include fixed 2.5 V output accuracy (±3.0% over –40°C to +85°C), 45 µA typical PFM quiescent current, 0.1 µA shutdown current, and compatibility with minimal external components (4.7 µF input/output caps + 4.7 µH inductor).
Technical Context
The MCP1603-250I/MC implements a current-mode, synchronous buck architecture with automatic PWM-to-PFM mode transition under light loads to maximize battery runtime. Its internal 0.8 V reference and feedback loop enable precise 2.5 V regulation without external resistors.
It integrates undervoltage lockout (UVLO = 2.28 V typ, 140 mV hysteresis), cycle-by-cycle overcurrent protection (860 mA peak limit), and thermal shutdown (150°C typ, 10°C hysteresis), all operating within a –40°C to +125°C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5 V ±3.0% over –40°C to +85°C - eliminates need for external voltage divider and simplifies layout. |
| Max Output Current | 500 mA continuous - supports core logic rails in handheld devices without external boost or parallel stages. |
| Input Voltage Range | 2.7 V to 5.5 V - directly compatible with 1-cell Li-Ion (2.7–4.2 V) and 2/3-cell NiMH/NiCd (2.4–4.5 V) sources. |
| Switching Frequency | 2.0 MHz typical - enables use of small 4.7 µH inductors and 4.7 µF ceramic capacitors for compact PCB area. |
| Quiescent Current | 45 µA typical in PFM mode - extends battery life in standby or low-power sensor wake-up states. |
| Shutdown Current | 0.1 µA typical - ensures negligible drain during system sleep or power-off modes. |
| Feedback Reference | 0.8 V ±2.5% - defines output via VOUT = 0.8 V × (1 + RTOP/RBOT); fixed 2.5 V variant internally sets this ratio. |
Pinout & Package
Package: 5-Lead TSOT-23 (MCP1603 variant), 0.95 mm height, RoHS-compliant, thermal pad not present (distinct from DFN variant).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power supply input | Accepts 2.7–5.5 V; requires local 4.7 µF ceramic decoupling to GND for stable operation. |
| GND | Ground reference | Primary return path for power and control circuits; must be low-inductance connection to minimize noise. |
| SHDN | Enable/disable control | Logic-high (>45% VIN) enables regulation; logic-low (<15% VIN) disables output and reduces current to 0.1 µA. |
| VFB/VOUT | Output voltage sense / feedback | Internally connected to fixed 2.5 V divider; connect directly to regulated output node for closed-loop stability. |
| LX | Switch node | Drives external buck inductor; carries high di/dt current - requires shortest possible trace to minimize EMI and voltage spikes. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated synchronous MOSFETs | P-channel and N-channel switches eliminate external diode, reducing conduction loss and board area. |
| Automatic PWM-to-PFM transition | Seamlessly shifts to 45 µA PFM mode below ~10 mA load - no external control or configuration required. |
| Internally compensated | No external compensation network needed - simplifies design validation and reduces BOM count. |
| 100% duty cycle capability | Maintains regulation even when VIN approaches VOUT (e.g., 2.7 V → 2.5 V), critical for battery end-of-discharge operation. |
| Robust protection suite | UVLO (2.28 V), thermal shutdown (150°C), and cycle-by-cycle current limiting (860 mA) prevent fault-induced damage. |
Applications
| USB-Powered Portable Devices | Digital Cameras |
|---|---|
Use Scenario: Powering image sensor, ISP, and SD card interface from USB 5 V source stepped down to 2.5 V. IC Role / Device Role / Timing Role: Primary 2.5 V power rail regulator delivering up to 500 mA with low ripple and fast transient response. Use Value: 2.0 MHz switching minimizes output ripple (<15 mV typical), preserving signal integrity in analog imaging paths. | Use Scenario: Supplying 2.5 V to CMOS image sensor and flash controller in compact camera modules. IC Role / Device Role / Timing Role: High-efficiency DC-DC converter enabling extended capture time on single Li-Ion cell. Use Value: 45 µA PFM quiescent current extends standby time between shots without compromising startup speed. |
| Handheld Medical Sensors | Industrial Handheld Terminals |
Use Scenario: Regulating 2.5 V for precision ADC, low-noise op-amps, and Bluetooth LE radio in battery-operated diagnostic tools. IC Role / Device Role / Timing Role: Low-noise, thermally robust power source meeting medical-grade reliability requirements. Use Value: Integrated UVLO and thermal shutdown ensure safe operation during prolonged field use at ambient extremes. | Use Scenario: Providing 2.5 V to microcontroller I/O banks and display driver in ruggedized warehouse scanners. IC Role / Device Role / Timing Role: Fixed-output buck regulator supporting wide input (2.7–5.5 V) from primary or backup batteries. Use Value: 100% duty cycle operation maintains regulation down to 2.7 V input - extends usable battery life per charge cycle. |
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, 3.6 MHz switching, 17 µA typical quiescent current in PFM mode. | Higher switching frequency allows smaller magnetics but increases EMI sensitivity; lower IQ benefits ultra-low-power sleep modes. | Select when higher output current headroom or lower quiescent current is prioritized over footprint compatibility. |
| Analog Devices ADP2302ARMZ-2.5-R7 | Fixed 2.5 V output, 600 mA rating, 600 kHz switching, 2.2 mA typical quiescent current, requires external compensation. | Lower frequency eases EMI filtering but demands larger inductors/caps; higher IQ reduces battery runtime in intermittent-use devices. | Select when cost-sensitive designs tolerate larger solution size and do not require sub-100 µA light-load efficiency. |
Compared with TPS62231DRYR and ADP2302ARMZ-2.5-R7, the MCP1603-250I/MC offers optimal balance of 500 mA capability, 2.0 MHz operation, 45 µA PFM IQ, and TSOT-23 footprint - making it ideal for space-constrained portable systems where moderate frequency and proven reliability are critical.
Availability
MCP1603-250I/MC is available at Aetrix Electronics and suitable for USB-powered portable devices, digital cameras, handheld medical sensors, and industrial handheld terminals requiring stable component supply across production lifecycles.
Supply support for MCP1603-250I/MC 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, and power management ICs for embedded control applications.
The MCP1603 family is designed specifically for high-efficiency, low-quiescent-current DC-DC conversion in battery-powered portable electronics - emphasizing small footprint, integrated functionality, and robust protection.
FAQ
What is the output voltage tolerance of the MCP1603-250I/MC over temperature?
The MCP1603-250I/MC provides a fixed 2.5 V output with ±3.0% tolerance over –40°C to +25°C ambient, and ±2.5% over +25°C to +85°C. This specification is guaranteed by internal trimming of the 0.8 V reference and feedback divider, ensuring stable rail generation across portable device operating conditions without external calibration.
Does the MCP1603-250I/MC require external compensation components?
No, the MCP1603-250I/MC is internally compensated. Its control loop is factory-tuned for stability with standard 4.7 µF input and output ceramic capacitors and a 4.7 µH inductor - eliminating the need for external RC networks, reducing design risk and BOM count.
Can the MCP1603-250I/MC operate with input voltage equal to its 2.5 V output?
Yes, the MCP1603-250I/MC supports 100% duty cycle operation, allowing regulation down to VIN = VOUT (e.g., 2.5 V input). In practice, minimum functional VIN is 2.7 V due to internal headroom, but the architecture sustains regulation as input drops toward output - critical for Li-Ion end-of-discharge performance.
What protection features are integrated into the MCP1603-250I/MC?
The MCP1603-250I/MC integrates undervoltage lockout (UVLO active below 2.28 V), cycle-by-cycle overcurrent limiting (860 mA peak), and thermal shutdown (150°C junction, 10°C hysteresis). These functions operate autonomously without external circuitry, safeguarding both the IC and downstream loads during fault conditions.
Is the MCP1603-250I/MC pin-compatible with other variants in the MCP1603/B/L family?
Yes, the MCP1603-250I/MC shares identical 5-lead TSOT-23 pinout and footprint with all MCP1603 and MCP1603B variants (e.g., MCP1603-120I/MC, MCP1603B-330I/MC). This enables drop-in replacement across fixed-output voltages and PWM-only variants without PCB redesign.
MCP1603-250I/MC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-VFDFN 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 (2x3)
MCP1603-250I/MC FAQ
1.How can I place an order for MCP1603-250I/MC through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP1603-250I/MC 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 MCP1603-250I/MC reliable?
The price and inventory of MCP1603-250I/MC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP1603-250I/MC is usually 5 days.
3.What payment methods are accepted for MCP1603-250I/MC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP1603-250I/MC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP1603-250I/MC?
MCP1603-250I/MC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP1603-250I/MC 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 MCP1603-250I/MC?
For technical support, including MCP1603-250I/MC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP1603-250I/MC requirements.
6.How does Aetrix verify that MCP1603-250I/MC is sourced from the original manufacturer or authorized distributors?
All MCP1603-250I/MC 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 MCP1603-250I/MC meets industry standards.
7.What is the process for return or replacement of MCP1603-250I/MC?
All MCP1603-250I/MC units undergo pre-shipment inspection (PSI). If there is an issue with MCP1603-250I/MC, 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 MCP1603-250I/MC part is unused and in its original packaging.
Return procedure for MCP1603-250I/MC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MCP1603-250I/MC 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…
