Microchip Technology MCP1602T-120I/MF

Overview

MCP1602T-120I/MF from Microchip Technology is a 500 mA synchronous buck DC-DC regulator with fixed 1.2 V output, 2.0 MHz PWM switching, power-good monitoring, and operation from 2.7–5.5 V input-designed for Li-Ion or multi-cell NiMH/NiCd battery-powered portable electronics requiring high efficiency at light and heavy loads.

For engineers reviewing the MCP1602T-120I/MF datasheet, MCP1602T-120I/MF pinout, MCP1602T-120I/MF application, or MCP1602T-120I/MF equivalent, this page delivers verified technical context, validated pin functions, confirmed thermal and protection behavior, real-world load-efficiency curves, and precise alternative selection guidance for battery-powered embedded systems.

Technical Context

The MCP1602T-120I/MF operates in automatic PWM-to-PFM mode transition: fixed 2.0 MHz (±0.4 MHz) PWM under heavy load (>~100 mA), and pulse-skipping PFM at light load to maintain 45 µA typical quiescent current. Its integrated P- and N-channel MOSFETs feature 450 mΩ R_DS(on) each, enabling >90% peak efficiency across 2.7–5.5 V input and 1.2 V/500 mA output.

It includes undervoltage lockout (UVLO) with 2.55 V nominal turn-on threshold and 200 mV hysteresis, overtemperature shutdown at 150 °C (10 °C hysteresis), cycle-by-cycle overcurrent limit at 700 mA, and an open-drain power-good (PG) output with 94% V_OUT activation threshold, 2% hysteresis, and 262 ms typical active timeout delay.

Key Specifications

Pinout & Package

The MCP1602T-120I/MF is housed in an 8-lead 3×3 mm DFN package (exposed pad EP connected to AGND) with wettable flanks, optimized for thermal performance (θ_JA = 60 °C/W on 4-layer board with 2 vias).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1602T-120I/MF, the TPS62231DRYR offers lower IQ and higher frequency but omits PG-critical for safe processor boot sequencing-while the ADP2301ARMZ-1.2-R7 retains PG but trades off size and efficiency for reduced switching loss and simpler EMI design.

Availability

MCP1602T-120I/MF is available at Aetrix Electronics and suitable for cellular telephones, USB-powered peripherals, portable medical sensors, and digital cameras requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for MCP1602T-120I/MF 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, interface, and power management ICs for embedded control applications.

The MCP1602 product line delivers highly integrated, low-quiescent-current synchronous buck regulators targeting battery-powered portable electronics where efficiency, small solution size, and reliable power sequencing are critical.

FAQ

What is the input voltage range supported by the MCP1602T-120I/MF?

The MCP1602T-120I/MF supports an input voltage range of 2.7 V to 5.5 V. This range accommodates single-cell Li-Ion batteries (2.7–4.2 V), USB 5 V sources, and 3-cell NiMH/NiCd packs (3.6–4.5 V). Operation below 2.7 V is blocked by undervoltage lockout (UVLO), which activates at 2.55 V nominal with 200 mV hysteresis. The MCP1602T-120I/MF must also satisfy VIN ≥ VOUT + 0.5 V, which is met across its entire specified input range for the fixed 1.2 V output.

Does the MCP1602T-120I/MF require external compensation components?

No, the MCP1602T-120I/MF features an internally compensated control loop. Unlike controller-only buck ICs, it does not require external RC compensation networks-regardless of output voltage or inductor value. This simplifies design, reduces BOM count, and improves layout robustness. The internal compensation is optimized for standard 4.7 µH inductors and 4.7 µF ceramic output capacitors, as validated in Microchip's typical application circuits for the MCP1602T-120I/MF.

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

The MCP1602T-120I/MF's open-drain PG output remains low until V_OUT reaches 94% of 1.2 V (1.128 V), then asserts high after a 262 ms timeout. If V_OUT later falls below 92% (1.104 V), PG transitions low within 165 µs. During UVLO, thermal shutdown, or overcurrent events, PG goes low immediately. The MCP1602T-120I/MF requires an external pull-up resistor (typically 10–100 kΩ to V_OUT or system V_CC) to interface with processor reset inputs or monitoring logic.

What package type and thermal characteristics apply to the MCP1602T-120I/MF?

The MCP1602T-120I/MF uses an 8-lead 3×3 mm DFN package with exposed thermal pad (EP), designated /MF in Microchip's ordering nomenclature. Its thermal resistance is θ_JA = 60 °C/W on a 4-layer PCB with internal ground plane and two thermal vias under the EP. The device includes overtemperature protection that shuts down operation at 150 °C junction temperature, with 10 °C hysteresis. The MCP1602T-120I/MF's low R_DS(on) (450 mΩ per FET) and efficient PWM/PFM operation minimize self-heating under typical loads.

Can the MCP1602T-120I/MF be used with ceramic output capacitors?

Yes-the MCP1602T-120I/MF is fully compatible with low-ESR ceramic output capacitors, including X5R and X7R dielectrics. Microchip's recommended design uses 4.7 µF ceramic capacitors on both input and output. The internal compensation and stable control loop ensure stability with ceramic capacitors down to 4.7 µF and up to 22 µF. Ceramic caps provide superior ripple suppression (10–15 mV typical) and transient response versus electrolytic alternatives, making them ideal for the MCP1602T-120I/MF's 2.0 MHz operation.