Monolithic Power Systems Inc. MP6302DD-LF-P

Overview

MP6302DD-LF-P from Monolithic Power Systems is an energy storage and release control IC that manages capacitor-based backup power for input rail stabilization. It operates across 4.2V–18V input, charges storage capacitors with 250mA current-limited pre-charge, regulates storage voltage via FB1 (typ. 1.0V feedback), releases up to 2.5A to maintain VIN above user-programmable release voltage (set via FB2), and provides dual open-drain power-good indicators (PGS/PGIN). It is used in SSDs and HDDs to sustain input voltage during brief power interruptions.

For engineers reviewing the MP6302DD-LF-P datasheet, MP6302DD-LF-P pinout, MP6302DD-LF-P application, or MP6302DD-LF-P equivalent, key selection criteria include programmable storage/release voltage thresholds, 2.5A dump current capability, QFN10 thermal performance (θJA = 70°C/W), integrated inrush limiting, and dual PG signaling for system-level power sequencing and fault response.

Technical Context

The MP6302DD-LF-P implements a two-phase energy management architecture: first, it pre-charges storage capacitors from 0V to VIN using internal 250mA current limiting; then, it engages a boost-assisted refresh loop via the BST pin connected to a DC/DC switch node to regulate storage voltage at a precise value set by FB1 resistive divider. The device continuously monitors VIN against a second resistive divider on FB2 to trigger controlled charge release when input drops below the programmed release threshold.

Its functional block includes independent hysteresis comparators for FB1 (±25mV hysteresis) and FB2 (±50mV hysteresis), open-drain PGS/PGIN outputs with defined logic thresholds (e.g., PGS low when FB1 < 0.85×VFB1), and thermal shutdown at 150°C with 30°C hysteresis. All operations are executed without external microcontroller intervention, enabling autonomous hold-up response within milliseconds.

Key Specifications

Pinout & Package

MP6302DD-LF-P is housed in a 2mm × 3mm QFN10 package with exposed thermal pad. Pin 1 is marked by index area; pin numbering follows top-view clockwise sequence starting from top-left corner.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar energy storage and release control applications.

Compared with TPS43060RTER and LTC3643EMSE#PBF, the MP6302DD-LF-P uniquely combines dual PG signaling, QFN10 compactness, and hardware-only autonomous operation - making it optimal for space-constrained, self-contained hold-up in storage and industrial edge devices.

Availability

MP6302DD-LF-P is available at Aetrix Electronics and suitable for hard disk drives, solid state drives, and industrial PLC I/O modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MP6302DD-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, and global manufacturing partnerships.

The MP6302 belongs to MPS's Energy Management product line, engineered specifically for autonomous, capacitor-based power fail protection in storage and industrial systems where firmware-free reliability and fast response are mandatory.

FAQ

What is the maximum storage voltage the MP6302DD-LF-P can regulate?

The MP6302DD-LF-P supports storage voltages up to 32V, limited by its absolute maximum VSTRG rating. In practice, storage voltage is constrained to ≤2×VIN (e.g., 24V max for 12V input), and must stay within the 4.2V–18V VIN range plus headroom for safe operation per datasheet Section 4.

How does the MP6302DD-LF-P initiate charge release during input brownout?

Release begins only after PGS goes high (indicating storage voltage ≥0.9×VFB1) and VIN falls below the FB2-set release threshold. An internal comparator triggers the dump path, allowing up to 2.5A current flow from STRG to VIN through a controlled MOSFET switch - no external enable signal required.

Can the MP6302DD-LF-P operate without a DC/DC converter present?

Yes - the BST pin may be left unconnected if no boost-refresh is needed (e.g., when storage voltage equals VIN). However, full functionality - including regulated storage voltage > VIN and long-term refresh - requires BST connection to a switching node per Figure 1 and Section 7.1.

What is the purpose of the NC pin (Pin 6) on the QFN10 package?

Pin 6 is internally unconnected and serves no electrical function. It must remain unconnected (floating) or be tied to GND per PCB layout best practices - never driven or used as a thermal pad extension, as it is not part of the exposed paddle structure.

How is thermal performance affected by PCB layout for the MP6302DD-LF-P?

Thermal resistance θJA = 70°C/W assumes a 4-layer board per JESD51-7. Reducing θJA requires maximizing copper area under the exposed thermal pad, using ≥4 thermal vias (0.3mm diameter), and avoiding signal traces beneath the pad - poor layout can increase junction temperature by >20°C at full dump load.

Does the MP6302DD-LF-P support automatic recharging after a release event?

Yes - once VIN recovers above the FB2 release threshold and remains stable, the MP6302DD-LF-P automatically resumes storage capacitor refresh via the BST-controlled boost circuit, restoring VSTRG to the FB1-set voltage without external intervention or reset.