Monolithic Power Systems Inc. MP5496GR-0001-Z

Overview

MP5496GR-0001-Z from Monolithic Power Systems is a digital power management IC integrating four synchronous buck converters (4.5A/2.5A/4A/2A), five LDOs (including RTC-dedicated 10mA LDO), I²C + OTP configuration, and programmable power sequencing - deployed in cable modems, IP cameras, and SSDs with 2.8V–5.5V input and QFN-28 package.

For engineers reviewing the MP5496GR-0001-Z datasheet, MP5496GR-0001-Z pinout, MP5496GR-0001-Z application, or MP5496GR-0001-Z equivalent, key selection criteria include per-rail current limits (Buck1: 6.8A peak), I²C slave address (0x69), OTP-configurable startup delays (0–12ms), RSTO reset timing (70–130ms), and thermal shutdown thresholds (145°C entry).

Technical Context

The MP5496GR-0001-Z implements constant-on-time (COT) control for Buck1–Buck4 to ensure fast transient response, with default 1.5MHz switching frequency in CCM mode reducing external passive size. Each buck uses integrated high-side/low-side MOSFETs with verified on-resistance (HSRDS-ON1: 10–50mΩ, LSRDS-ON1: 12–20mΩ) and hiccup-mode OCP.

Five LDOs are partitioned across two input domains (VIN2 powers LDORTC/LDO2/LDO3; VIN5 powers LDO4/LDO5), supporting independent sequencing via OTP. The I²C interface enables real-time voltage adjustment, status register reads (ID2, status), and software reset, while OTP stores immutable settings including start-up order, push-button timer (2s), and RSTO delay.

Key Specifications

Pinout & Package

MP5496GR-0001-Z is housed in a thermally enhanced QFN-28 (4mm × 4mm, 0.5mm pitch) package with exposed thermal pad. Pin layout supports split ground planes (GND1/GND2/GND3/GND4) and dedicated analog supply (AVIN/AGND) to minimize noise coupling between power stages and logic circuitry.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar digital PMIC applications.

Compared with MP5496GR-0001-Z, MP5494GR-0001-Z reduces cost and complexity but sacrifices RTC support and peak current headroom; RTQ2132BGQW-Z offers simpler I²C-only control but lacks OTP immutability and requires additional sequencing logic.

Availability

MP5496GR-0001-Z is available at Aetrix Electronics and suitable for cable modems, IP cameras, and SSDs requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for MP5496GR-0001-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 over 20 years of expertise in DC/DC conversion, battery management, and integrated PMICs.

The MP5496 product line targets space-constrained, multi-rail consumer and industrial systems requiring digital configurability, robust protection, and minimal external components - designed specifically for 5V-input platforms like STBs, routers, and edge storage devices.

FAQ

What is the default output voltage configuration for MP5496GR-0001-Z?

The MP5496GR-0001-Z is factory-programmed with OTP defaults: Buck1 = 1.0V, Buck2 = 0.9V, Buck3 = 0.9V, Buck4 = 1.8V, LDORTC = 1.2V, LDO2 = 3.0V, LDO3 = 1.8V, LDO4 = 1.2V, LDO5 = 0.9V. These values are immutable unless reprogrammed via I²C during operation.

Can MP5496GR-0001-Z operate from a single 3.3V input?

Yes - all input rails (VIN1–VIN5, AVIN) accept 2.8V to 5.5V. With 3.3V input, Buck1 delivers 1.0V at up to 4.5A with >88% efficiency (per typical curves), and LDORTC maintains 1.2V output with 100mV dropout at 10mA load.

How is thermal performance managed in the QFN-28 package?

The QFN-28 exposes a thermal pad tied to GND1/GND2/GND3/GND4. With 4-layer PCB layout (2 oz copper, 10 vias to inner ground plane), θJA is 44°C/W. Thermal shutdown activates at 153°C junction temperature, and recovery occurs at 130°C hysteresis to prevent oscillation.

Does MP5496GR-0001-Z support dynamic voltage scaling (DVS)?

Yes - DVS is implemented via I²C register writes to adjust Buck1–Buck4 output voltages in 12.5mV steps. The slew rate is programmable through the DVS_SLEW register, enabling controlled transitions (e.g., 10mV/µs) to avoid system instability during frequency scaling.

What happens if the I²C bus fails during operation?

All OTP-configured settings (startup order, voltage defaults, RSTO delay) remain fully functional. I²C failure disables only runtime adjustments (DVS, current limit changes, status reads) - the PMIC continues regulating all 9 outputs using its stored OTP configuration.

Is the nPBIN pin compatible with mechanical push buttons?

Yes - nPBIN accepts direct connection to momentary switches. Its internal 5–13µA pull-up to AVIN eliminates external resistors; a 2-second low pulse triggers shutdown, and release initiates restart after power-on delay defined in OTP.

How many unique OTP configurations can be created for MP5496?

The OTP configuration code "xxxx" supports 65,536 unique variants (0000–FFFF hex). Each variant defines distinct voltage, sequencing, and timing parameters. Custom codes require MPS FAE collaboration and are programmed at wafer/test level - not user-field programmable.