MCP1603T-180I/OS Microchip Integrated Circuit (SOT23 (5-Pin)) In Stock

Name: MCP1603T-180I/OS
Brand: Microchip
SKU: MCP1603T-180I/OS
Availability: InStock

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.

ACTIVEIntegrated CircuitVerified Jun 2026

Package / Visual Reference

MCP1603T-180I/OSSOT23 (5-Pin)

Quick Facts

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

What are the key features of MCP1603T-180I/OS?

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

What is MCP1603T-180I/OS used for?

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.

What are the specifications of MCP1603T-180I/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	1.854V
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

Where can I find the MCP1603T-180I/OS datasheet?

MCP1603T-180I/OS Datasheet Download

Official datasheet from Microchip

What are equivalent replacements for MCP1603T-180I/OS?

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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AvailabilityIn Stock

Reference Price (USD)

From $0.1909

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Qty.	Unit Price	Ext. Price
1+	$0.5900	$0.59
4+	$0.4364	$1.75
250+	$0.1974	$49.35
500+	$0.1941	$97.05
1000+	$0.1909	$190.90

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Unit price: $0.5900 · Total: $0.59

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Lead Time3-7 business days

MOQFrom 1 piece

ShippingDHL / FedEx / UPS

OriginChina (Authorized)

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MCP1603T-180I/OS Microchip Integrated Circuit (SOT23 (5-Pin)) In Stock

What are the key features of MCP1603T-180I/OS?

What is MCP1603T-180I/OS used for?

What are the specifications of MCP1603T-180I/OS?

Compliance & Regulatory

Where can I find the MCP1603T-180I/OS datasheet?

What are equivalent replacements for MCP1603T-180I/OS?

Frequently Asked Questions

How does MCP1603T-180I/OS achieve high efficiency at light loads below 50 mA?

What inductor and capacitor values are recommended for MCP1603T-180I/OS at 2 MHz switching frequency?

In which compact form-factor designs does the TSOT-5 package of MCP1603T-180I/OS offer a meaningful advantage over SOT-23-5?

Related Guides

CSD87313DMS Synchronous Buck Power Stage Design Guide

STEF05SGR eFuse Selection Guide for 5 V Overcurrent Protection

C0402C103K3RACTU Selection Guide: Choosing a 10 nF 0402 MLCC

STM32H753VIT6 MCU Selection Guide: Memory, Package, Connectivity, and Security

Why Buy from FindMyChip

About Microchip

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