MCP1603T-ADJI/OS Microchip Integrated Circuit (SOT23 (5-Pin)) In Stock
Microchip MCP1603T-ADJI/OS is a 500 mA adjustable-output synchronous buck regulator with PWM/PFM switching at 2 MHz. It operates from a 2.7 V to 5.5 V input supply and features current-mode control in a compact TSOT-5 package. Available from stock worldwide with competitive pricing.
- Manufacturer
- Microchip
- Package
- SOT23 (5-Pin)
- Pin Count
- 5
- Lifecycle
- ACTIVE
- Datasheet
- MCP1603T-ADJI/OS Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.2120(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
- 500 mA output current with 2 MHz PWM/PFM switching for compact, low-noise power supply designs
- Adjustable output voltage from a 2.7 V–5.5 V input enables flexible power rail generation
- Automatic PWM-to-PFM mode transition improves light-load efficiency in battery-powered applications
Applications
The MCP1603T-ADJI/OS is well-suited for portable consumer electronics, IoT sensor nodes, and wearable devices that demand efficient DC-DC conversion from single-cell Li-Ion batteries. Its 2 MHz switching frequency enables the use of very small external inductors and capacitors, minimizing total solution footprint. The adjustable output and current-mode PWM/PFM control also make it a strong fit for low-power microcontroller supply rails in space-constrained designs.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | TSOT-5 |
| Factory Lead Time | 6Weeks |
| 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 | 4.5V |
| Output Voltage-Min | 0.8V |
| 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
What input and output voltage range does the MCP1603T-ADJI/OS support?
The MCP1603T-ADJI/OS accepts an input voltage between 2.7 V and 5.5 V, making it compatible with single-cell Li-Ion batteries and regulated 3.3 V or 5 V rails. The output voltage is fully adjustable via an external resistor divider, allowing designers to set the rail precisely for their application requirements.
How does the MCP1603T-ADJI/OS achieve high efficiency at light loads in battery-powered designs?
At light loads, the regulator automatically transitions from PWM to PFM mode, reducing switching losses and quiescent current draw. This automatic PWM/PFM switching at up to 2 MHz frequency ensures the converter maintains high efficiency across the full load range from near-zero milliamps up to 500 mA, extending battery life in portable systems.
What external components are needed and how small can the power stage be for MCP1603T-ADJI/OS?
Because the MCP1603T-ADJI/OS switches at 2 MHz, designers can use inductors as small as 1 µH and ceramic output capacitors in the range of 4.7 µF to 10 µF, resulting in a total solution area under 10 mm². The TSOT-5 package itself measures just 1.6 mm × 2.9 mm, making it one of the smallest 500 mA buck solutions available.
When would MCP1603T-ADJI/OS be preferred over a fixed-output LDO for a microcontroller rail?
Compared to a typical LDO, the MCP1603T-ADJI/OS synchronous buck topology can deliver efficiencies above 85% at 500 mA, dramatically reducing power dissipation from a 5 V input. An LDO in the same scenario would waste (5 V − 3.3 V) × 500 mA = 850 mW as heat, making the switching regulator the clear choice for thermally constrained PCBs.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.5900 | $0.59 |
| 25+ | $0.4900 | $12.25 |
| 100+ | $0.4500 | $45.00 |
| 250+ | $0.2192 | $54.80 |
| 500+ | $0.2156 | $107.80 |
| 1000+ | $0.2120 | $212.00 |
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