Microchip Technology MCP1602T-150I/MS

Overview

MCP1602T-150I/MS from Microchip Technology is a fixed-output 1.5 V, 500 mA synchronous buck regulator in MSOP-8 package, featuring 2.0 MHz PWM operation, power-good monitoring with 262 ms delay, and ultra-low 45 µA quiescent current-designed for single-cell Li-Ion or dual/triple NiMH/NiCd battery-powered portable electronics requiring stable low-voltage rail generation.

For engineers reviewing the MCP1602T-150I/MS datasheet, MCP1602T-150I/MS pinout, MCP1602T-150I/MS application, or MCP1602T-150I/MS equivalent, this page delivers verified technical context, validated pin functions, confirmed efficiency curves across load and input voltage, real-world thermal resistance (θ_JA = 211°C/W), and precise alternative selection guidance for 1.5 V DC-DC conversion in space-constrained portable systems.

Technical Context

The MCP1602T-150I/MS operates in automatic PWM-to-PFM mode transition: at heavy loads (>~100 mA), it runs at a fixed 2.0 MHz switching frequency with low output ripple (10–15 mV typical); at light loads, it enters PFM mode to maintain 45 µA typical quiescent current. Its integrated synchronous P-channel and N-channel MOSFETs eliminate external diode losses.

It implements cycle-by-cycle overcurrent protection (700 mA peak limit), undervoltage lockout (2.55 V typical, 200 mV hysteresis), and thermal shutdown (150°C typical, 10°C hysteresis). The open-drain PG pin asserts after 262 ms when V_OUT reaches ≥94% of 1.5 V and deasserts when falling below 92%, providing robust power sequencing for microcontrollers and processors.

Key Specifications

Pinout & Package

Package: 8-Lead MSOP (3.0 mm × 4.9 mm × 1.1 mm), exposed pad not present (unlike DFN variant); RoHS-compliant, Pb-free, moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 1.5 V synchronous buck regulator applications.

Compared with TPS62231DRYR and RT8059GJ6, the MCP1602T-150I/MS uniquely balances 2.0 MHz operation, guaranteed 262 ms PG delay, and MSOP-8 thermal performance-making it optimal for battery-powered systems where reset timing accuracy and mid-frequency EMI control are critical.

Availability

MCP1602T-150I/MS is available at Aetrix Electronics and suitable for cellular telephones, USB-powered devices, digital cameras, and portable computers requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.

Supply support for MCP1602T-150I/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 company specializing in microcontrollers, analog devices, and power management ICs, with broad automotive, industrial, and consumer design-in support.

The MCP1602 product line delivers highly integrated, low-quiescent-current DC-DC converters for portable battery-powered applications-designed to maximize runtime while minimizing external component count and PCB area.

FAQ

What is the exact output voltage tolerance of the MCP1602T-150I/MS?

The MCP1602T-150I/MS provides a fixed 1.5 V output with a tolerance of ±2.5% over temperature and line conditions, as specified in the DC Characteristics table (DS22061A-page 5). This means the actual output remains between 1.4625 V and 1.5375 V under all operating conditions including -40°C to +85°C ambient, ensuring reliable operation for 1.5 V logic interfaces and memory subsystems.

Does the MCP1602T-150I/MS require external compensation components?

No, the MCP1602T-150I/MS is internally compensated and does not require external RC networks-this applies specifically to fixed-output versions like the MCP1602T-150I/MS. Unlike adjustable variants, it uses an internal feedback path tied to the VOUT pin, eliminating the need for external resistors or compensation capacitors and simplifying layout for 1.5 V applications.

What is the maximum recommended PCB copper area for thermal management of the MCP1602T-150I/MS?

The MCP1602T-150I/MS in MSOP-8 has a thermal resistance θ_JA of 211°C/W on a standard 4-layer board with internal ground plane. To sustain 500 mA continuous output at +85°C ambient, the junction temperature must stay ≤+125°C. With typical 88% efficiency at 3.6 V input, power dissipation is ~0.2 W-requiring no special copper pours beyond standard 10–15 mm² thermal relief pads under pins 4 (AGND) and 8 (PGND).

Can the MCP1602T-150I/MS operate from a 2.7 V input while delivering 500 mA at 1.5 V?

Yes, the MCP1602T-150I/MS supports 2.7 V minimum input and delivers full 500 mA output at 1.5 V, as confirmed by Figure 2-5 (Efficiency vs. Output Load, VOUT = 1.5 V) and the "Maximum Output Current" specification (500 mA, Note 1). At 2.7 V input, efficiency drops to ~82% (per typical curves), but regulation and current capability remain fully functional per datasheet limits.

How does the power-good (PG) function behave during input voltage brown-out?

When VIN drops below the UVLO threshold (2.55 V typical), the MCP1602T-150I/MS disables switching and pulls PG low within 165 µs (t_RPD). Once VIN recovers above UVLO, soft-start initiates and PG remains low until VOUT reaches ≥1.41 V (94% of 1.5 V) and sustains that level for 262 ms (t_RPU) before going high-ensuring clean reset signaling even during repeated brown-out events.