MCP1603T-180I/OS Microchip Integrated Circuit (SOT23 (5-Pin)) In Stock
Microchip MCP1603T-180I/OS is a 2 MHz synchronous buck regulator delivering 500 mA at a fixed 1.8 V output from a 2.7 V to 5.5 V input. It supports PWM and PFM modes for high-efficiency light-load operation. Available in compact TSOT-5 package with worldwide shipping.
- Manufacturer
- Microchip
- Package
- SOT23 (5-Pin)
- Pin Count
- 5
- Lifecycle
- ACTIVE
- Datasheet
- MCP1603T-180I/OS Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.1909(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 MHz PWM/PFM switching regulator delivering 500 mA output current in a tiny TSOT-5 package
- Fixed 1.8 V output from 2.7 V to 5.5 V input range covering single-cell Li-Ion and USB-powered applications
- Current-mode control with automatic PFM for high efficiency across the full 0-500 mA load range
Applications
MCP1603T-180I/OS is ideal for portable electronics and IoT nodes where board space is critical and the processor core needs a stable 1.8 V rail from a Li-Ion or USB 5 V source. Its 2 MHz switching frequency allows use of tiny 1 µH inductors and small ceramic capacitors, minimizing total solution size. The automatic PFM mode sustains high efficiency at light loads, extending battery run-time in sleep-mode-intensive wearable and sensor designs.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | TSOT-5 |
| Factory Lead Time | 7Weeks |
| 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 | 1.854V |
| Output Voltage-Min | 1.746V |
| Output Voltage-Nom | 1.8V |
| 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 |
| Time@Peak Reflow Temperature-Max (s) | 40 |
| Package | SOT23 (5-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| 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
How does MCP1603T-180I/OS achieve high efficiency at light loads below 50 mA?
MCP1603T-180I/OS automatically transitions from PWM to PFM mode at light loads, reducing switching losses significantly. At loads below 50 mA the PFM mode can sustain efficiencies above 80%, extending battery life in IoT sensor nodes that spend most of their time in 1.8 V sleep states.
What inductor and capacitor values are recommended for MCP1603T-180I/OS at 2 MHz switching frequency?
At the 2 MHz switching frequency, a 1 µH inductor and a 10 µF output ceramic capacitor are sufficient to meet typical 500 mA load regulation. Using X5R or X7R ceramics with low ESR keeps output ripple below 20 mV, meeting the noise requirements of RF and precision analog circuits powered at 1.8 V.
In which compact form-factor designs does the TSOT-5 package of MCP1603T-180I/OS offer a meaningful advantage over SOT-23-5?
The TSOT-5 package has a smaller footprint than standard SOT-23-5, with a body roughly 1.6 mm x 1.6 mm and 0.95 mm pitch leads, saving approximately 20% of board area. This matters most in wearables, hearing aids, and sub-1 cm² power rails where every square millimeter of PCB space is constrained.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.5900 | $0.59 |
| 4+ | $0.4364 | $1.75 |
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| 500+ | $0.1941 | $97.05 |
| 1000+ | $0.1909 | $190.90 |
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