Monolithic Power Systems Inc. MP2330HGTL-P

Overview

MP2330HGTL-P from Monolithic Power Systems is a fully integrated 24V-input, 3A-output synchronous buck converter with constant-on-time (COT) control, 1.2MHz switching frequency, 75mΩ/40mΩ internal MOSFETs, and SOT583 package. It delivers tight output regulation for point-of-load conversion in space-constrained consumer electronics power rails.

For engineers reviewing the MP2330HGTL-P datasheet, MP2330HGTL-P pinout, MP2330HGTL-P application, or MP2330HGTL-P equivalent, this page provides verified technical context, validated pin functions, confirmed protection features (OCP, SCP, thermal shutdown), and real-world application constraints including pre-bias start-up behavior and BST capacitor requirements.

Technical Context

The MP2330HGTL-P uses constant-on-time (COT) control with input- and output-voltage-dependent on-timer to maintain stable 1.2MHz operation across 4.2–24V input range. Its valley-current sensing enables precise over-current protection with hiccup recovery mode.

It integrates high-side (75mΩ) and low-side (40mΩ) N-channel MOSFETs, a bootstrap regulator with 2.2V UVLO, and an open-drain power-good (PG) output referenced to 805mV feedback threshold. Forced PWM mode ensures continuous conduction regardless of load.

Key Specifications

Pinout & Package

SOT583 (1.6mm × 2.1mm) thermally enhanced 8-pin package with exposed pad for improved heat dissipation and compact footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MP2330HGTL-P, MP2330GTL-Z offers identical functionality in tape-and-reel form for production, while RT6220AGQW trades 3A capability and wide-input flexibility for adjustable frequency and simpler gate drive-making it unsuitable as a drop-in replacement in 24V or 3A applications.

Availability

MP2330HGTL-P is available at Aetrix Electronics and suitable for game consoles, digital set-top boxes, flat-panel television power supplies, and industrial HMI panels requiring stable component supply with guaranteed long-term sourcing.

Supply support for MP2330HGTL-P 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 focus on integration, efficiency, and miniaturization.

The MP2330H product line targets space-constrained, high-efficiency DC/DC conversion in consumer and industrial applications, emphasizing fast transient response, robust protection, and simplified layout through integrated power stages.

FAQ

What is the minimum recommended BST capacitor value and dielectric type?

The MP2330HGTL-P requires a 1µF X7R or X5R ceramic capacitor between BST and SW pins. This value ensures stable bootstrap voltage under full-load conditions and prevents high-side FET turn-off due to insufficient gate drive. Use 0603 or 0805 case size with 10V or higher voltage rating; avoid Y5V or Z5U dielectrics due to capacitance drift with temperature and bias.

Does MP2330HGTL-P support forced PWM mode at light loads?

Yes, MP2330HGTL-P operates exclusively in forced PWM mode across the entire 0–3A load range. Unlike diode-emulation or pulse-skipping modes, this guarantees constant 1.2MHz switching frequency, eliminating audible noise and enabling predictable EMI filter design regardless of output loading.

How is the soft-start time calculated for a given capacitor on the SS pin?

Soft-start time (T_SS) in milliseconds is calculated as T_SS = (2 × V_REF × C_SS) / I_SS, where V_REF = 0.805V, I_SS = 7.3µA typical, and C_SS is in nanofarads. For example, a 100nF capacitor yields ~22ms ramp time. The SS pin voltage ramps linearly until reaching 2×V_REF, after which regulation begins.

What is the maximum allowable output capacitance before soft-start failure occurs?

The maximum output capacitance (C_{O_MAX}) is limited by soft-start current and time: C_{O_MAX} ≈ (I_{LIM_AVG} − I_OUT) × T_SS / ΔV_OUT. With typical I_{LIM_AVG} ≈ 3A, T_SS = 22ms, and ΔV_OUT = 0.1V, C_{O_MAX} ≈ 660µF. Exceeding this may prevent V_OUT from reaching regulation before soft-start completes.

Can MP2330HGTL-P safely start into a pre-biased 3.3V output?

Yes, MP2330HGTL-P supports monotonic pre-bias start-up. When V_OUT is pre-charged, the internal BST refresh circuit recharges the bootstrap capacitor, and the SS pin charges only after V_SS/2 exceeds V_FB. This prevents reverse current flow and ensures controlled ramp-up without output collapse or latch-up.

What is the purpose of the 40.2kΩ resistor in the typical application circuit?

The 40.2kΩ resistor (R1) forms the upper leg of the feedback divider for 3.3V output. With R2 = 13kΩ and V_REF = 0.805V, it sets V_OUT = 0.805V × (1 + 40.2kΩ/13kΩ) ≈ 3.3V. Its value balances divider current (≈55µA) between noise immunity and quiescent loss.

Is thermal derating required for continuous 3A operation at 85°C ambient?

Yes. On a standard 2-layer EV board, θ_JA = 55°C/W. At 85°C ambient and 3A/3.3V (P_D ≈ 0.33W), junction temperature rises to ~103°C - within the 125°C max operating limit. However, for 125°C ambient or higher-power loads, reduce output current or improve PCB copper area and thermal vias to maintain T_J < 150°C.