Monolithic Power Systems Inc. MP2460GJ-Z

Overview

MP2460GJ-Z from Monolithic Power Systems is a 45V, 0.6A synchronous step-down DC/DC converter in TSOT23-6 package, integrating high-side (420mΩ) and low-side (220mΩ) MOSFETs with current-mode control, 1.7MHz fixed switching frequency, and 0.8V feedback reference for precise output regulation down to 0.8V - deployed in power meters and aftermarket automotive systems.

For engineers reviewing the MP2460GJ-Z datasheet, MP2460GJ-Z pinout, MP2460GJ-Z application, or MP2460GJ-Z equivalent, key selection criteria include its 4.5–45V input range, 1μA shutdown quiescent current, hiccup-mode short-circuit protection, and TSOT23-6 thermal performance (θJA = 74°C/W on 2-layer PCB).

Technical Context

The MP2460GJ-Z implements peak-current-mode PWM control with internal compensation, enabling fast transient response without external loop components. Its oscillator delivers a tightly regulated 1.7MHz (±18%) switching frequency, with minimum on-time of 100ns and minimum off-time of 92ns to support high duty-cycle operation up to 98%.

It features dual over-current protection: valley-current limiting during low-side conduction and peak-current limiting during high-side conduction, coupled with thermal shutdown at 151°C and 21°C hysteresis. The dedicated EN pin includes internal 2kΩ pull-down and 6V Zener clamping for robust enable/disable sequencing.

Key Specifications

Pinout & Package

MP2460GJ-Z is housed in a thermally enhanced TSOT23-6 package (2.9mm × 1.6mm × 0.85mm), optimized for high-power density and board-level thermal management on 2-layer PCBs (θJA = 74°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous step-down converter applications.

Compared with MP2460GJ-Z, MP2451DJ-LF-P trades integrated low-side FET and hiccup protection for marginally higher frequency, while TPS54240DGQ offers higher current at the cost of increased design complexity, larger footprint, and missing fault-handling features critical for automotive and metering use cases.

Availability

MP2460GJ-Z is available at Aetrix Electronics and suitable for power meters, aftermarket automotive electronics, multi-function printers, and general 36V industrial systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MP2460GJ-Z 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

Monolithic Power Systems (MPS) is a fabless semiconductor company specializing in high-performance power management ICs, with design centers in the US, China, and Taiwan, and global manufacturing partnerships.

The MP2460 belongs to MPS's high-voltage synchronous buck converter product line, engineered for compact, efficient DC/DC conversion in automotive, industrial, and energy metering applications where input voltage variability and reliability under fault conditions are critical.

FAQ

What is the maximum achievable output voltage with MP2460GJ-Z?

The MP2460GJ-Z supports output voltages from 0.8V up to 0.98 × VIN. With a 45V maximum input, the theoretical upper limit is 44.1V; however, practical output is constrained by inductor saturation, thermal limits, and stability margins. For 12V output, the recommended design uses 360kΩ/25.5kΩ feedback resistors per the datasheet.

Does MP2460GJ-Z support pre-biased output startup?

Yes - MP2460GJ-Z is explicitly designed for monotonic start-up into pre-biased outputs. Its internal soft-start capacitor charges only when the BST voltage exceeds threshold and FB voltage remains below the soft-start ramp, preventing reverse current flow and ensuring controlled VOUT rise even when the output rail is initially energized.

Can MP2460GJ-Z operate with ceramic output capacitors only?

Yes - the MP2460GJ-Z is stable with ceramic, electrolytic, or tantalum output capacitors. Its dedicated internal compensation eliminates phase-margin sensitivity to ESR, and typical designs use 22μF X5R/X7R MLCCs with <10mΩ ESR for 5V/0.6A outputs, achieving <10mVpp ripple at 1.7MHz.

What is the purpose of the BST pin, and what capacitor value is required?

The BST pin supplies gate drive voltage to the high-side MOSFET via an external bootstrap capacitor connected between BST and SW. A 0.1μF X7R ceramic capacitor rated for ≥10V is required; placement must be adjacent to the IC with minimal trace length to ensure reliable high-side turn-on and prevent shoot-through during switching transitions.

How does the MP2460GJ-Z handle short-circuit conditions?

Under short-circuit, the MP2460GJ-Z triggers valley-current limiting during low-side conduction, then enters hiccup mode: it disables the power stage, discharges the soft-start capacitor, waits ~30ms, and attempts restart. This cycle repeats until the fault clears, limiting average power dissipation to <100mW and preventing thermal damage.

Is MP2460GJ-Z qualified for automotive applications?

MP2460GJ-Z meets AEC-Q200 stress test requirements for temperature cycling, humidity, and mechanical shock, and is widely used in aftermarket automotive systems. However, it is not officially AEC-Q100 qualified; for ASIL-B/C applications, designers must perform system-level FMEDA and incorporate external watchdog supervision.

What is the minimum input voltage required to sustain regulation at 5V output?

With 98% maximum duty cycle and 100ns minimum on-time, MP2460GJ-Z can regulate 5V output down to ~5.1V input under light load. At full 0.6A load, practical minimum VIN is ~5.5V due to R_DS(on) drop and inductor DCR - confirmed by efficiency curves showing >80% at VIN = 6V, VOUT = 5V.