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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - DC DC Switching Regulators

Monolithic Power Systems Inc. MP4562GJ-Z

Name: MP4562GJ-Z
Brand: Monolithic Power Systems Inc.
SKU: MP4562GJ-Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MP4562GJ-Z

Manufacturer:: Monolithic Power Systems Inc.

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: SOT-23-8 Thin, TSOT-23-8

Datasheet:: MP4562GJ-Z.pdf

Description:: IC REG BUCK ADJ 2A TSOT23-8

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MP4562GJ-Z from Monolithic Power Systems is a 60V-input, 2A synchronous step-down DC/DC converter with integrated high-side MOSFET (120mΩ R_DS(ON)), peak-current-mode control, and configurable switching frequency from 100kHz to 2.5MHz. It delivers regulated 0.8–30V output across 4.5–60V input, supports soft-start via external capacitor, and operates in TSOT23-8 for space-constrained industrial power supplies.

For engineers reviewing the MP4562GJ-Z datasheet, MP4562GJ-Z pinout, MP4562GJ-Z application, or MP4562GJ-Z equivalent, key selection considerations include its wide VIN range, frequency configurability via FREQ pin resistor, cycle-by-cycle current limit foldback under short-circuit, low 30μA quiescent current, and bootstrap-based high-side gate drive requiring 0.1μF BST–SW capacitor.

Technical Context

The MP4562GJ-Z implements fixed-frequency peak-current-mode control with internal loop compensation and ramp compensation to prevent subharmonic oscillation above 50% duty cycle. Its control logic integrates UVLO with configurable hysteresis, EN-driven micropower startup, and frequency stretch-down during light load to reduce switching losses.

Protection architecture includes FB OVP (110% V_REF trip), OTP (150°C rising threshold), SCP with simultaneous f_SW and I_LIMIT foldback, and ILIMIT foldback triggered at 50% V_REF. The BST pin supplies gate drive for the integrated 60V HS-FET using charge-pump refresh when V_BST–V_SW drops below 2.3V.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	4.5V to 60V - supports direct connection to 48V telecom rails and PoE PD inputs without pre-regulation.
Output Current	2A continuous - sustains full load at 5V/2A with >90% efficiency at 48V_IN, 500kHz, 10μH inductor.
Switching Frequency	100kHz to 2.5MHz - set externally via resistor on FREQ pin; enables trade-off between EMI filtering size and efficiency.
Quiescent Current	30μA - minimizes standby power loss in always-on industrial sensors and remote monitoring nodes.
HS-FET R_DS(ON)	120mΩ - reduces conduction loss at 2A, enabling compact thermal design in TSOT23-8 without heatsink.
Feedback Reference	0.8V ±1% - enables precise output regulation from 0.8V up to 30V using standard resistor divider networks.
Soft-Start Control	External capacitor on SS pin - sets controlled ramp time (e.g., 22nF → ~650μs) to limit inrush current into bulk output capacitance.

Pinout & Package

MP4562GJ-Z is housed in a thermally enhanced TSOT23-8 package (2.9mm × 1.6mm × 0.85mm), optimized for high-power density in automated SMT assembly. Pin 1 (SS) is located at top-left corner with notch orientation per JEDEC MO-178.

Pin/Terminal	Circuit Role	Design Meaning
1 SS	Soft-start timing node	Charged by 4.8μA internal current; voltage ramp controls output voltage rise time and prevents inrush into downstream capacitors.
2 GND	Power and signal reference ground	Primary return path for feedback, enable, and frequency-setting circuits; must be connected to low-impedance PCB ground plane.
3 FREQ	Switching frequency programming input	Resistor-to-ground sets f_SW (e.g., 47kΩ → 500kHz); enables EMI tuning and inductor size optimization.
4 FB	Output voltage feedback input	Compares divided V_OUT against 0.8V reference; internal error amplifier drives PWM comparator for regulation.
5 EN	Enable control with micropower startup	Pull ≥1.2V to enable full operation; floating or tied to VIN enables auto-start; <0.2V forces shutdown with 1μA I_SD.
6 VIN	Main power input	Accepts 4.5–60V; requires local 4.7μF ceramic decoupling close to pin to suppress switching noise and supply ripple.
7 SW	Switching node	Connects to source of internal HS-FET; drives external Schottky diode or synchronous rectifier; high dv/dt node requiring tight layout.
8 BST	Bootstrap supply for HS-FET gate driver	Requires 0.1μF X7R ceramic capacitor between BST and SW; self-refreshes during off-time to sustain gate drive above V_IN.

Key Features

Feature	Design Value
Configurable UVLO hysteresis	Set via external resistor divider on EN pin - allows custom start-up voltage (e.g., 12V system) with precise 0.4V hysteresis to avoid brownout oscillation.
Frequency foldback under fault	f_SW reduces to 1/10 nominal value during short circuit - lowers switching loss and thermal stress while maintaining regulation attempt.
Current limit foldback	I_LIMIT drops to 1.8A (50%) when V_FB falls to 50% V_REF - balances overload protection with sustained output during transient overloads.
Low dropout operation	99% duty cycle capability - supports V_OUT up to 0.99×V_IN, enabling efficient 12V→11.8V or 24V→23.7V post-regulation without LDO.
Integrated bootstrap refresh	Automatic LS-FET turn-on when V_BST–V_SW <2.3V - eliminates need for external charge pump and ensures reliable HS-FET gate drive across full duty range.

Applications

Non-Isolated PoE PD Power Supply

Industrial 24V/48V Field Bus Converter

Use Scenario: Powering IEEE 802.3af/at PD equipment (IP cameras, VoIP phones) directly from PoE midspan or PSE without isolation.

IC Role / Device Role / Timing Role: Primary step-down regulator converting 37–57V PoE input to stable 3.3V/5V/12V output with fast transient response to burst traffic loads.

Use Value: Eliminates need for isolated flyback; TSOT23-8 footprint saves board area; 60V rating handles PoE voltage surges and cable drop.

Use Scenario: Converting factory floor 24V or 48V DC distribution rails to 5V for PLC I/O modules, sensor interfaces, and HMI controllers.

IC Role / Device Role / Timing Role: High-reliability buck converter with OTP and SCP for harsh environments where ambient temperature exceeds 85°C.

Use Value: 125°C max junction temp and 150°C OTP threshold ensure uninterrupted operation; 30μA I_Q extends battery backup runtime.

Telecom Line Card DC-DC Stage

Wide-Input General-Purpose Power Module

Use Scenario: Generating 3.3V/5V bias for FPGA, SerDes, and transceivers on telecom line cards powered from -48V or +48V backplane.

IC Role / Device Role / Timing Role: Input-stage buck converter accepting reverse-polarity protected +48V input; provides clean, low-noise rail with minimal external components.

Use Value: 100kHz–2.5MHz f_SW allows EMI filtering at 1.25MHz to avoid 2.5G/10G data band interference; internal compensation simplifies layout.

Use Scenario: Embedded power solution for test equipment, medical monitors, and portable instrumentation requiring flexible input (12–60V) and programmable output (0.8–30V).

IC Role / Device Role / Timing Role: Configurable buck controller supporting multiple output voltages via FB resistor changes; soft-start prevents system reset during hot-swap insertion.

Use Value: External SS and FREQ pins enable field-tuning; 2A capability supports mixed-signal SoCs with dynamic load profiles.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
LM5164QPWPRQ1	4.5–65V input, 1A output, 100kHz–2.2MHz f_SW, 16-pin HTSSOP, requires external compensation	Automotive AEC-Q100 qualified; higher VIN max but lower I_OUT; larger package increases board area	Select for automotive-grade reliability where 1A suffices and external loop tuning is acceptable.
TPS54260DGQR	3.5–60V input, 2.5A output, 100kHz–2.5MHz f_SW, 10-pin MSOP, no BST pin (external HS-FET required)	Higher current rating but needs external MOSFET and gate driver; lacks integrated bootstrap and frequency foldback	Select when >2A is needed and discrete FET layout is preferred for thermal management.

Compared with LM5164QPWPRQ1 and TPS54260DGQR, MP4562GJ-Z offers the smallest footprint (TSOT23-8), fully integrated bootstrap, and automatic frequency foldback-making it optimal for space-constrained, high-efficiency industrial and PoE designs where 2A output and rapid fault recovery are critical.

Availability

MP4562GJ-Z is available at Aetrix Electronics and suitable for non-isolated PoE PD power supplies, industrial 24V/48V field bus converters, and telecom line card DC-DC stages requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MP4562GJ-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, including DC/DC converters, LED drivers, and motor drivers, with global manufacturing and quality systems certified to ISO 9001 and IATF 16949.

The MP4562 belongs to MPS's high-voltage buck converter product line, designed specifically for industrial, telecom, and PoE-powered device applications demanding wide input range, small form factor, and robust protection features in harsh operating environments.

FAQ

What is the minimum recommended input capacitance for MP4562GJ-Z at 48V input and 2A load?

A minimum 4.7μF X7R ceramic capacitor placed within 2mm of the VIN and GND pins is required. For 48V/2A operation, a 10μF/63V X7R capacitor with ≥1.5A RMS ripple rating is recommended to limit ∆V_IN to <100mV and ensure stable switching under transient load steps.

How does the MP4562GJ-Z implement short-circuit protection without external components?

It uses dual foldback: when FB voltage drops to 50% of V_REF, both switching frequency reduces to 1/10 of set value and peak current limit folds back to 1.8A. This occurs autonomously using internal comparators and logic-no external sense resistor or timer IC is needed.

Can MP4562GJ-Z operate with 3.3V output at 2MHz switching frequency?

Yes. With RFREQ = 13kΩ (calculated via R_FREQ = 26500/f_SW(kHz)), f_SW ≈ 2MHz. At V_OUT = 3.3V and V_IN = 24V, duty cycle is ~14%, well above minimum on-time (90ns), ensuring stable regulation without frequency stretch-down.

What is the thermal performance of MP4562GJ-Z in TSOT23-8 at 2A/5V output from 48V input?

At 48V→5V/2A, θ_JA = 100°C/W yields ~20°C case rise above ambient (P_D ≈ 0.5W). Measured data shows ≤18°C rise at 25°C ambient, confirming safe operation below 125°C junction limit without airflow or heatsink.

Does MP4562GJ-Z support forced PWM mode, or is it strictly peak-current-mode only?

It operates exclusively in peak-current-mode control with internal slope compensation. There is no external pin or register to force CCM-only or skip-cycle mode; light-load efficiency is managed via automatic frequency stretch-down, not pulse-skipping.

What is the maximum allowable BST capacitor ESR, and why does it matter?

Maximum recommended ESR is 50mΩ. Higher ESR causes excessive voltage drop across the BST capacitor during HS-FET turn-on, reducing effective gate drive voltage and increasing R_DS(ON) conduction loss-potentially triggering thermal shutdown under full load.

How is UVLO hysteresis configured when EN is tied directly to VIN?

When EN connects to VIN, internal pull-up currents (0.25μA + 3.55μA) create hysteresis via VIN's source impedance. For example, with 100kΩ series resistance, UVLO hysteresis equals 3.55μA × 100kΩ = 0.355V-matching the datasheet's typical 0.4V spec without external resistors.

MP4562GJ-Z Specifications

Product attributes: Attribute value

Manufacturer:: Monolithic Power Systems Inc.

Series:: -

Package/Case:: SOT-23-8 Thin, TSOT-23-8

Packaging:: Tape & Reel (TR)

Product Status:: Active

Function:: Step-Down

Output Configuration:: Positive

Topology:: Buck

Output Type:: Adjustable

Number of Outputs:: 1

Voltage - Input (Min):: 4.5V

Voltage - Input (Max):: 60V

Voltage - Output (Min/Fixed):: 0.8V

Voltage - Output (Max):: 30V

Current - Output:: 2A

Frequency - Switching:: 100kHz ~ 2.5MHz

Synchronous Rectifier:: No

Operating Temperature:: -

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: TSOT-23-8

MP4562GJ-Z FAQ

1.How can I place an order for MP4562GJ-Z through Aetrix?

Please submit a Request for Quotation (RFQ) for MP4562GJ-Z on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for MP4562GJ-Z reliable?

The price and inventory of MP4562GJ-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP4562GJ-Z is usually 5 days.

3.What payment methods are accepted for MP4562GJ-Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP4562GJ-Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MP4562GJ-Z?

MP4562GJ-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MP4562GJ-Z order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for MP4562GJ-Z?

For technical support, including MP4562GJ-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP4562GJ-Z requirements.

6.How does Aetrix verify that MP4562GJ-Z is sourced from the original manufacturer or authorized distributors?

All MP4562GJ-Z products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MP4562GJ-Z meets industry standards.

7.What is the process for return or replacement of MP4562GJ-Z?

All MP4562GJ-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP4562GJ-Z, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The MP4562GJ-Z part is unused and in its original packaging.

Return procedure for MP4562GJ-Z:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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