Microchip Technology MCP1602-180I/MS

Overview

MCP1602-180I/MS from Microchip Technology is a fixed-output 1.8 V, 500 mA synchronous buck regulator in an 8-lead MSOP package, featuring 2.0 MHz PWM operation, power-good monitoring with 262 ms delay, and automatic PWM-to-PFM mode transition for battery-powered systems. It operates from 2.7V to 5.5V input, delivers >90% typical efficiency, and integrates undervoltage lockout, overtemperature, and cycle-by-cycle overcurrent protection.

For engineers reviewing the MCP1602-180I/MS datasheet, MCP1602-180I/MS pinout, MCP1602-180I/MS application, or MCP1602-180I/MS equivalent, this page provides verified technical context, validated pin functions, confirmed fixed 1.8 V output behavior, real-world thermal performance (θ_JA = 211°C/W), and direct alternative options for portable Li-Ion and USB-powered designs.

Technical Context

The MCP1602-180I/MS implements a fully integrated synchronous buck topology with internal P- and N-channel MOSFETs (R_DS(on) = 450 mΩ each), enabling high-efficiency DC-DC conversion without external switches. Its dual-mode control-2.0 MHz fixed-frequency PWM under heavy load and pulse-skipping PFM at light load-maintains >90% efficiency across 0.1–500 mA output current while minimizing quiescent current (45 µA typical).

Power-good signaling uses an open-drain PG output with precise thresholds (94% V_OUT high, 92% V_OUT low) and built-in 262 ms active timeout, ensuring reliable system reset sequencing. Protection includes UVLO (2.55 V nominal with 200 mV hysteresis), thermal shutdown at 150°C, and 700 mA peak current limiting-functions fully operational in the -40°C to +85°C industrial temperature range.

Key Specifications

Pinout & Package

Package: 8-lead MSOP (3.0 mm × 4.9 mm × 1.1 mm), surface-mount, exposed pad not present (DFN variant has EP; MSOP does not).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous buck regulator applications.

Compared with MCP1602-180I/MS, the TPS62231DRYR offers higher integration density and lower quiescent current but no PG function, while the ADP2302ARMZ-R7 provides flexibility at the cost of added components and no built-in power validation-making MCP1602-180I/MS optimal for fixed-rail, PG-dependent portable systems.

Availability

MCP1602-180I/MS is available at Aetrix Electronics and suitable for portable medical sensors, USB-powered IoT nodes, industrial handheld terminals, smart camera modules, and battery-backed embedded controllers requiring stable component supply and long-term lifecycle support.

Supply support for MCP1602-180I/MS includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Microchip Technology is a U.S.-based semiconductor manufacturer specializing in microcontrollers, analog, and power management ICs, with a focus on embedded control and energy-efficient solutions.

The MCP1602 product line delivers highly integrated, low-quiescent-current DC-DC converters optimized for space-constrained, battery-operated applications where reliability, fixed-voltage simplicity, and power-good sequencing are essential.

FAQ

What is the output voltage tolerance of the MCP1602-180I/MS?

The MCP1602-180I/MS has a fixed 1.8 V output with ±2.5% tolerance over temperature and load, as specified in the DC characteristics table. This tolerance applies across the full -40°C to +85°C operating junction temperature range and for output currents from 0.1 mA to 500 mA. The MCP1602-180I/MS achieves this without external resistors, leveraging internal precision feedback circuitry referenced to a 0.8 V bandgap.

Does the MCP1602-180I/MS require external compensation components?

No, the MCP1602-180I/MS is internally compensated and requires no external RC network for loop stability. This is explicitly stated in the Features section and confirmed in Section 4.1 of the datasheet. The MCP1602-180I/MS achieves stable operation with standard 4.7 µH inductors and 4.7 µF ceramic capacitors-reducing bill-of-materials count and simplifying layout for fixed-output applications.

How does the power-good (PG) output behave during startup and fault conditions?

The MCP1602-180I/MS PG output remains low until V_OUT rises above 94% of 1.8 V (≈1.692 V), then asserts high after a 262 ms timeout. If V_OUT falls below 92% of 1.8 V (≈1.656 V), PG transitions low within 165 µs. During UVLO, thermal shutdown, or overcurrent events, PG goes low immediately. This behavior is inherent to the MCP1602-180I/MS and requires no external timing components.

Can the MCP1602-180I/MS operate from a 5 V USB source?

Yes, the MCP1602-180I/MS supports input voltages from 2.7 V to 5.5 V, making it fully compatible with standard 5 V USB power. At VIN = 5 V and VOUT = 1.8 V, efficiency exceeds 90% at 300 mA load (per Figure 2-7). Input capacitor requirements remain unchanged: ≥4.7 µF X5R/X7R ceramic placed adjacent to the VIN and PGND pins is sufficient for stable operation.

What thermal derating applies to the MCP1602-180I/MS in MSOP-8 package?

The MCP1602-180I/MS in MSOP-8 has θ_JA = 211°C/W on a typical 4-layer board. With 500 mA output at 1.8 V and 5 V input, power dissipation is ~1.2 W, resulting in ~254°C rise-exceeding the +125°C max junction limit. Derating is required: at ambient 25°C, maximum continuous load is ~220 mA. For full 500 mA, use forced air or thermal vias to reduce effective θ_JA; the MCP1602-180I/MS will activate thermal shutdown at 150°C if exceeded.