MCP1603T-120I/OS Microchip Integrated Circuit (Other) In Stock
Microchip MCP1603T-120I/OS is a 2.0 MHz synchronous buck regulator with a fixed 1.2 V output and 500 mA current capability, powered from a 2.7 V to 5.5 V input supply. Its current-mode PWM/PFM control and SOT-23-5 footprint make it ideal for low-voltage MCU core rails and portable device power trees.
- Manufacturer
- Microchip
- Package
- Other
- Pin Count
- 5
- Lifecycle
- ACTIVE
- Datasheet
- MCP1603T-120I/OS Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.4300(MOQ 25)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of MCP1603T-120I/OS?
- Fixed 1.2 V output ideal for low-voltage MCU core and processor supplies
- 500 mA continuous output current
- 2.0 MHz switching frequency for compact 1 µH inductor and 4.7 µF ceramic capacitor design
- Input voltage range 2.7 V to 5.5 V compatible with Li-ion and USB rails
- Automatic PWM/PFM switching for high efficiency across load range
- Current-mode control for fast transient response
- RoHS compliant SOT-23-5 (TSOT-5) package
What is MCP1603T-120I/OS used for?
MCP1603T-120I/OS is used to generate a stable 1.2 V core voltage for FPGAs, DSPs, and low-voltage microcontrollers powered from USB or single-cell Li-ion sources in portable electronics and IoT devices. It is also deployed in wireless sensor nodes, Bluetooth modules, and embedded camera modules where a tight 1.2 V rail is required alongside a main 3.3 V supply.
What are the specifications of MCP1603T-120I/OS?
| 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 | 1.236V |
| Output Voltage-Min | 1.164V |
| Output Voltage-Nom | 1.2V |
| 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 | Other |
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 |
Where can I find the MCP1603T-120I/OS datasheet?
MCP1603T-120I/OS Datasheet DownloadOfficial datasheet from Microchip
What are equivalent replacements for MCP1603T-120I/OS?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What output voltage does MCP1603T-120I/OS provide and which processor core rails does it suit?
MCP1603T-120I/OS delivers a fixed 1.2 V output at up to 500 mA, which directly matches the core supply requirement of many modern FPGAs, ARM Cortex-A/M processors, and DSPs that have separated I/O and core voltage domains. Pairing it with a 3.3 V LDO or another buck for I/O rails completes a typical dual-rail design.
How does the PFM mode improve battery life in a Li-ion powered IoT sensor node?
At light loads below approximately 50 mA, MCP1603T-120I/OS automatically transitions from PWM to PFM mode, reducing switching losses and quiescent current to improve conversion efficiency above 85% even at 1 mA load. This extends battery runtime in sleep-heavy IoT applications where the 1.2 V rail is only lightly loaded most of the time.
What external inductor and capacitor values are recommended for a compact 1.2 V output stage?
The 2.0 MHz switching frequency allows using a 1 µH to 2.2 µH shielded inductor and a 4.7 µF to 10 µF ceramic output capacitor, keeping the power stage under 10 mm² on a standard 2-layer PCB. An additional 1 µF input ceramic capacitor close to the VIN pin is recommended for stability.
Is MCP1603T-120I/OS footprint-compatible with the MCP1603T-330I/OS 3.3 V variant for multi-rail boards?
Yes. Both variants share the identical 5-pin TSOT-5 (SOT-23-5) footprint and the same external component values, enabling a single PCB layout that can be populated with either the 1.2 V or 3.3 V variant depending on the rail requirement. Only output voltage — 1.2 V versus 3.3 V — differs between the two parts.
What MSL rating and storage requirements apply to MCP1603T-120I/OS for SMT assembly planning?
MCP1603T-120I/OS is rated MSL 1, meaning it has unlimited floor life at ambient conditions below 30°C and 85% RH and requires no bake-out before reflow soldering. This simplifies warehouse storage and production scheduling compared to MSL 3 or higher-rated components that require controlled dry-pack storage.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 25+ | $0.4900 | $12.25 |
| 100+ | $0.4500 | $45.00 |
| 1000+ | $0.4300 | $430.00 |
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