Monolithic Power Systems Inc. MP2498DV-LF-P

Overview

MP2498DV-LF-P from Monolithic Power Systems is a 100V load dump-protected, 2A non-synchronous buck regulator with integrated high-side MOSFET (R_DS(ON) = 250 mΩ), programmable 150 kHz–2 MHz switching frequency, and 120 µA quiescent current. It delivers adjustable 0.8 V–15 V output in automotive and industrial power systems where input surges up to 100 V/100 ms must be tolerated without external Transorb or fuse.

For engineers reviewing the MP2498DV-LF-P datasheet, MP2498DV-LF-P pinout, MP2498DV-LF-P application, or MP2498DV-LF-P equivalent, key selection criteria include its integrated 100 V overvoltage protection circuitry, cycle-by-cycle current limiting (3.2 A typ), thermal shutdown (150 °C), and QFN28 (4 mm × 5 mm) package with exposed thermal pad for high-power-density designs.

Technical Context

The MP2498DV-LF-P implements current-mode PWM control with internal error amplifier (G_CS = 5.7 A/V, V_FB = 0.800 V ±20 mV), programmable oscillator (set via FREQ pin resistor), and bootstrap-driven high-side gate driver with UVLO (2.2 V, 150 mV hysteresis). Its dedicated CTR pin enables precise input overvoltage clamping using an external Zener diode.

It features pulse-skipping mode at light load to reduce switching loss, internal soft-start (0.5 ms ramp), EN pin with 1.55 V rising threshold and 320 mV hysteresis, and fault recovery via FB-pull-down during short-circuit events. The device operates across –40 °C to +125 °C junction temperature with 50 °C/W θ_JA.

Key Specifications

Pinout & Package

MP2498DV-LF-P is housed in a thermally enhanced 28-pin QFN package (4 mm × 5 mm, 0.5 mm pitch) with exposed thermal pad (Pin 4) requiring direct connection to PCB ground plane for optimal thermal performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage buck regulator applications.

Compared with MP2498DV-LF-P, MP4322 offers higher current and efficiency but forfeits integrated 100 V protection, while LM5164QPWPRQ1 provides AEC-Q100 qualification and better EMI performance but demands full external surge protection - making MP2498DV-LF-P uniquely suited for space-constrained automotive front-end regulators needing single-chip surge resilience.

Availability

MP2498DV-LF-P is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial PLC I/O modules, and distributed battery management systems requiring stable component supply amid end-of-life transitions.

Supply support for MP2498DV-LF-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 analog and power ICs, with design centers in the US, China, and Taiwan.

The MP2498 belongs to MPS's automotive-grade buck regulator product line, engineered specifically for robustness in harsh environments - emphasizing integrated surge protection, wide temperature operation, and minimal external component count.

FAQ

What is the maximum surge voltage MP2498DV-LF-P can withstand without damage?

The MP2498DV-LF-P survives 100 V transients for up to 100 ms duration per ISO 7637-2 Pulse 5a, enabled by its integrated 100 V overvoltage protection circuit tied to the CTR pin. This rating is validated under recommended Zener clamping (e.g., 5.1 V Zener for 5 V VDD) and proper PCB layout with low-inductance VIN routing.

Can MP2498DV-LF-P operate with ceramic output capacitors only?

Yes - the MP2498DV-LF-P is explicitly designed for ceramic capacitor stability. Its current-mode control architecture and compensation flexibility allow stable operation with low-ESR ceramic outputs (e.g., 22 µF X5R 1206) without requiring added ESR or damping resistors, reducing solution size and improving transient response.

How does the FREQ pin set switching frequency, and what resistor value gives 1 MHz?

The FREQ pin uses a resistor-to-ground to program frequency: f_SW ≈ 100,000 / R_FREQ(kΩ) − 5 kHz. For 1 MHz operation, R_FREQ = 95 kΩ (typical), yielding 1.0 MHz ±20% across temperature. Layout requires short trace and local 100 pF bypass to minimize noise coupling into the oscillator.

Why does MP2498DV-LF-P require an external Schottky diode instead of synchronous rectification?

The MP2498DV-LF-P is a non-synchronous buck regulator with only an integrated high-side switch. Its SW pin drives an external Schottky diode (e.g., CMSH2-100M) to complete the current path during off-time. This architecture simplifies thermal design and avoids shoot-through risk, though it trades ~3% efficiency versus synchronous alternatives.

What is the minimum recommended input capacitance for 2 A operation at 12 V input?

For 2 A continuous output at 12 V input, MPS recommends ≥4.7 µF ceramic input capacitance (X5R/X7R, 1206 or larger) placed within 3 mm of IN and GND pins, plus a 0.1 µF high-frequency ceramic cap adjacent to the IC. Total RMS current rating must exceed 1 A to handle ripple without derating.

Is MP2498DV-LF-P RoHS compliant and lead-free?

Yes - the "-LF" suffix denotes lead-free, RoHS-compliant packaging per EU Directive 2011/65/EU. All die, bond wires, and mold compound meet JEDEC J-STD-020 moisture sensitivity level 3 (MSL3) and pass MPS green status verification for halogen-free content.

Does MP2498DV-LF-P support output voltages below 0.8 V?

No - the internal feedback reference is fixed at 0.800 V ±20 mV. Output voltage is calculated as V_OUT = 0.8 V × (1 + R1/R2), so the lowest achievable regulated output is 0.8 V (when R1 = 0 Ω). Sub-0.8 V operation violates regulation and is not supported.