MCP1603T-250I/OS Microchip Integrated Circuit (SOT23 (5-Pin)) In Stock
Microchip MCP1603T-250I/OS is a 2.0 MHz synchronous buck regulator delivering up to 500 mA output current with a fixed 2.5 V output, operating from a 2.7 V to 5.5 V input supply. Its current-mode PWM control and tiny SOT-23-5 package make it ideal for portable and space-constrained power rails.
- Manufacturer
- Microchip
- Package
- SOT23 (5-Pin)
- Pin Count
- 5
- Lifecycle
- ACTIVE
- Datasheet
- MCP1603T-250I/OS Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.3276(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 2.0 MHz switching frequency enabling small external passives
- 500 mA continuous output current capability
- Fixed 2.5 V output in a SOT-23-5 package
- Input voltage range 2.7 V to 5.5 V for single-cell Li-ion and USB sources
- Current-mode PWM control for fast transient response
- PFM mode for improved efficiency at light loads
- RoHS compliant, lead-free packaging
Applications
MCP1603T-250I/OS is widely used in battery-powered consumer electronics, wearable devices, and portable instruments where a compact step-down regulator must supply 2.5 V from a Li-ion or USB source. It also serves as a point-of-load regulator in wireless sensor nodes and Bluetooth/ZigBee modules where PCB area and quiescent current are tightly constrained.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | TSOT-5 |
| YTEOL | 8 |
| Additional Feature | IT CAN ALSO OPERATE WITH PULSE FREQUENCY MODULATION |
| Analog IC - Other Type | SWITCHING REGULATOR |
| Control Mode | CURRENT-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 5.5V |
| Input Voltage-Min | 2.7V |
| Input Voltage-Nom | 3.6V |
| JESD-30 Code | R-PDSO-G5 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Output Current-Max | 0.5A |
| Output Voltage-Max | 2.575V |
| Output Voltage-Min | 2.425V |
| Output Voltage-Nom | 2.5V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSOP5/6,.11,37 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, THIN PROFILE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Screening Level | TS 16949 |
| Surface Mount | YES |
| Switcher Configuration | BUCK |
| Switching Frequency-Max | 2800kHz |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.95mm |
| Terminal Position | DUAL |
| Package | SOT23 (5-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 2 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
| Country of Origin | Malaysia |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What output current can MCP1603T-250I/OS continuously deliver in a 2.5 V buck application?
MCP1603T-250I/OS supports up to 500 mA continuous output current at 2.5 V, making it suitable for MCUs, RF transceivers, and peripheral circuits that together draw moderate current from a compact synchronous buck stage.
How does the 2.0 MHz switching frequency influence inductor and capacitor selection in this regulator?
Operating at 2.0 MHz allows designers to use inductors in the 1 µH to 2.2 µH range and ceramic output capacitors as small as 4.7 µF, shrinking total BOM size and PCB footprint compared to lower-frequency alternatives. The result is a compact power stage below 10 mm² on many layouts.
Can MCP1603T-250I/OS be powered directly from a single-cell Li-ion battery?
Yes. The device accepts input voltages from 2.7 V to 5.5 V, which spans the full discharge curve of a 3.7 V Li-ion cell (approximately 3.0 V to 4.2 V). This means it can regulate a stable 2.5 V output without an intermediate boost stage, extending usable battery runtime.
What makes the SOT-23-5 package practical for wearable and IoT PCB layouts?
The SOT-23-5 package occupies a board footprint of roughly 1.6 mm × 2.9 mm, allowing the regulator to fit in densely populated wearable or IoT modules alongside RF ICs and sensors. The 5-pin layout simplifies routing with minimal via count compared to larger QFN alternatives.
Is MCP1603T-250I/OS a direct alternative to MCP1603T-330I/OS when a 2.5 V rather than 3.3 V rail is required?
Yes. Both devices share the same SOT-23-5 footprint, 500 mA current rating, and 2.0 MHz switching frequency. The only difference is the fixed output voltage — 2.5 V for the -250 variant versus 3.3 V for the -330 variant — enabling a pin-compatible swap when a lower voltage rail is required.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.5380 | $0.54 |
| 25+ | $0.4900 | $12.25 |
| 78+ | $0.4680 | $36.50 |
| 100+ | $0.4500 | $45.00 |
| 250+ | $0.3744 | $93.60 |
| 500+ | $0.3276 | $163.80 |
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