My Inquiry
My Account
Monolithic Power Systems Inc. MPQ4568GQ-Z
- Part No.:
- MPQ4568GQ-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
MPQ4568GQ-Z.pdf
- Description:
- IC REG BUCK ADJ 100MA 10QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,830
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MPQ4568GQ-Z from Monolithic Power Systems is a synchronous step-down DC/DC converter IC with integrated 60V high-side/low-side MOSFETs, delivering up to 100mA output current at >90% efficiency (10VIN→5VOUT/2mA), featuring 1.0V feedback reference, programmable peak current limit (55–260mA), and 4.5V–45V input range - deployed in industrial 4–20mA current loops and automotive power rails.
For engineers reviewing the MPQ4568GQ-Z datasheet, MPQ4568GQ-Z pinout, MPQ4568GQ-Z application, or MPQ4568GQ-Z equivalent, this page delivers verified technical context, validated pin functions, confirmed thermal shutdown behavior (160°C trip), exact QFN10 package mapping, and real-world soft-start timing (1ms internal, adjustable via SS capacitor).
Technical Context
The MPQ4568GQ-Z implements constant-frequency PWM control with zero-current detection (ZCD) and precision peak current limiting-no external sense resistor required. Its dual-stage UVLO (rising 4.0V / falling 3.5V) and programmable hysteresis enable robust startup under fluctuating battery inputs.
It integrates a bootstrap-regulated high-side driver (BST-SW capacitor required), BIAS pin for optional efficiency-boosting auxiliary supply (>2.9V enables internal regulator override), and ENHY open-drain flag for coordinated system-level fault signaling-supporting fail-safe shutdown sequencing in distributed power systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 45V - supports wide automotive battery transients and industrial 24V/48V rails without external pre-regulation. |
| Output Current | 100mA continuous - sufficient for powering isolated sensors, CAN transceivers, and analog front-ends in loop-powered systems. |
| Feedback Reference | 1.0V ±1% - enables precise output voltage setting (e.g., 3.3V with 523k/1.2M divider) with minimal resistor-divider current error. |
| Quiescent Current | 20μA typical - ensures multi-year operation in battery-backed instrumentation and remote IoT nodes. |
| Shutdown Current | <5μA - critical for maintaining battery charge during extended sleep modes in portable diagnostics equipment. |
| Thermal Shutdown | 160°C trip with 20°C hysteresis - prevents permanent damage during sustained overload or poor PCB thermal design. |
| Peak Current Limit | Programmable 55–260mA via ILIM-to-GND resistor - allows optimization of inductor size and ripple while guaranteeing short-circuit protection. |
Pinout & Package
MPQ4568GQ-Z is housed in a thermally enhanced 3mm × 3mm QFN10 package with exposed thermal pad (pin 3 GND connected to pad). The package supports high-power-density layouts and requires controlled-impedance routing for SW and BST nodes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 BST | Bootstrap supply | Drives high-side MOSFET gate; requires 0.1μF ceramic cap between BST and SW to sustain gate drive during high-duty-cycle operation. |
| 2 SW | Switch node | High-current switching point connecting HS-FET drain, LS-FET source, and inductor; must be routed with minimal loop area to reduce EMI. |
| 3 GND | Power ground | Main return path for high-switching currents; connects directly to thermal pad and output capacitor negative terminal for low-impedance path. |
| 4 BIAS | Auxiliary bias supply | When ≥2.9V, powers internal regulator; when ≥4.5V, also drives LS-FET gate - improves efficiency by reducing VIN loading. |
| 5 FB | Feedback input | Compares output voltage (via resistive divider) against 1.0V reference; sensitive to noise - requires short trace and optional 39pF feedforward cap. |
| 6 ILIM | Current limit programming | Sets peak inductor current (55–260mA) with resistor to GND; floating = 55mA, shorted = 260mA - defines max safe output capability. |
| 7 SS | Soft-start control | Internal 3μA current charges external capacitor to ramp reference voltage; 3nF yields 1ms start time - prevents output overshoot and inrush stress. |
| 8 ENHY | Enable hysteresis flag | Open-drain output pulled low when EN falls below 1.2V - enables external hysteresis circuitry for custom UVLO thresholds. |
| 9 EN | Enable input | Active-high logic (1.6V rising threshold); internally pulled down by 2MΩ - allows direct connection to microcontroller GPIO or battery monitor outputs. |
| 10 IN | Main input supply | Accepts 4.5–45V; requires local 10μF ceramic decoupling at pin to suppress switching noise and stabilize regulation. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 60V MOSFETs | 0.7Ω low-side RDS(on) and 2.25Ω high-side RDS(on) - eliminates external FETs and gate drivers, reducing BOM count and layout complexity. |
| Ceramic-capacitor stable | No external compensation required - supports compact, low-ESR 22μF output caps without phase-margin risk or oscillation. |
| Adjustable input UVLO hysteresis | Configurable via EN/ENHY resistor network - enables custom brown-in/brown-out behavior for battery voltage monitoring without extra ICs. |
| Light-load frequency scaling | Reduces switching frequency under light load - cuts gate driver and switching losses to maintain >85% efficiency down to 1mA output. |
| Precision current limit | ±15% tolerance over temperature - provides repeatable short-circuit response without calibration, critical for safety-certified industrial designs. |
Applications
| 4–20mA Current Loop Transmitter | Automotive Body Control Module (BCM) |
|---|---|
|
Use Scenario: Powering precision DACs, op-amps, and HART modems in two-wire field transmitters operating from 12–42V loop supply. IC Role / Device Role / Timing Role: Primary 3.3V/100mA point-of-load regulator with ultra-low quiescent current to avoid violating loop compliance voltage. Use Value: 20μA IQ ensures >99% of loop current remains available for signal transmission, meeting IEC 61000-4-5 surge immunity requirements. |
Use Scenario: Supplying microcontrollers, LIN transceivers, and LED drivers in door modules, seat controls, and mirror actuators. IC Role / Device Role / Timing Role: Secondary regulator deriving 3.3V from vehicle battery (9–16V nominal, up to 45V load dump). Use Value: 45V max input and 50V OVP protect against ISO 7637-2 pulse 5a/b transients; thermal shutdown prevents latch-up during cabin temperature extremes. |
| Industrial Distributed Power System | Battery-Powered Diagnostic Tool |
|
Use Scenario: Local regulation for isolated RS-485 nodes, analog sensor interfaces, and EEPROMs across factory-floor PLC backplanes. IC Role / Device Role / Timing Role: Compact, self-contained buck converter enabling board-level power segmentation without centralized DC/DC. Use Value: QFN10 footprint and ceramic-cap stability allow placement directly beside downstream ICs - minimizes voltage drop and noise coupling. |
Use Scenario: Portable handheld testers for HVAC, automotive, or process instrumentation requiring multi-year shelf life on primary lithium cells. IC Role / Device Role / Timing Role: Main system regulator with <5μA shutdown current and programmable soft-start to prevent cold-start failure at low battery voltage. Use Value: 1.0V reference and 20μA IQ enable accurate ADC reference and long-term data logging without periodic recharge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4569GQ-Z | Same QFN10 package and pinout; higher 200mA output current; identical 4.5–45V input and 1.0V reference. | Supports higher load demands (e.g., dual-sensor nodes) but draws 25μA IQ - less suitable for ultra-low-power battery use. | Select when output current >100mA is required and thermal margin permits higher dissipation. |
| LMR14010AQDDARQ1 | Automotive-grade (AEC-Q100); 40V max input; 1A output; requires external compensation; larger SO-8 package. | Designed for ASIL-B systems; includes spread-spectrum clocking and enhanced ESD - over-engineered for non-automotive industrial use. | Choose only if AEC-Q100 qualification, higher current, or automotive functional safety compliance is mandatory. |
Compared with MPQ4568GQ-Z, MPQ4569GQ-Z offers headroom for future load growth without layout change, while LMR14010AQDDARQ1 adds automotive validation at cost of size, complexity, and quiescent current - making MPQ4568GQ-Z optimal for space-constrained, battery-sensitive industrial applications.
Availability
MPQ4568GQ-Z is available at Aetrix Electronics and suitable for 4–20mA current loops, automotive body electronics, and battery-powered diagnostic tools requiring stable component supply across extended temperature ranges (–40°C to +125°C).
Supply support for MPQ4568GQ-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 core expertise in integrated DC/DC converters, motor drivers, and LED controllers.
The MPQ4568 belongs to MPS's industrial-grade synchronous buck converter product line, designed specifically for reliable operation in harsh environments including automotive transients, wide-input industrial supplies, and long-life battery systems.
FAQ
What is the minimum inductor value supported by MPQ4568GQ-Z?
The device specifies a 100ns minimum switch-on time. For VIN(MAX) = 45V and peak current = 260mA, the calculated LMIN is 17.3μH. Using an inductor below this value risks loss of regulation under heavy load due to inability to sustain current during minimum on-time - verified per Equation (5) in the datasheet.
Can MPQ4568GQ-Z operate with no external soft-start capacitor?
Yes - the IC includes an internal 1ms soft-start timer activated when the SS pin is left floating. This provides guaranteed inrush current limiting and output voltage ramping without additional components, confirmed in Section 9.2 of the datasheet.
How does the BIAS pin improve efficiency?
When BIAS ≥ 2.9V, it powers the internal 2.6V regulator instead of VIN, reducing input current draw. At ≥4.5V, it also supplies the low-side MOSFET gate driver - cutting VIN-related losses by up to 15% in 12V-to-3.3V conversion, per Figure 12 efficiency curves.
Is the ENHY pin required for basic operation?
No - ENHY is optional. It serves only to add external hysteresis to the EN pin's UVLO threshold using resistor networks (Figures 5–6). Basic enable/disable functionality works with EN alone; ENHY is used only when custom hysteresis beyond the internal 0.5V is needed.
What is the maximum allowable voltage on the BST pin relative to SW?
The absolute maximum BST-to-SW voltage is +6.0V, per Absolute Maximum Ratings Table. Exceeding this risks gate oxide breakdown in the internal high-side driver - design practice mandates a 0.1μF X7R ceramic capacitor rated for ≥10V placed directly between BST and SW.
Does MPQ4568GQ-Z support forced PWM mode?
No - the device uses adaptive frequency scaling (pulse-frequency modulation under light load) and lacks a MODE pin or register control for fixed-frequency operation. Its light-load efficiency advantage comes precisely from disabling forced PWM, as documented in the Operation section.
Can the FB pin be used for output voltage monitoring in closed-loop systems?
Yes - the FB node carries the scaled output voltage (e.g., 1V at 3.3V output). It can interface directly with an MCU ADC or comparator for telemetry or fault detection, provided the 50nA max FB bias current and 35–85mV OVP hysteresis are accounted for in firmware thresholds.
MPQ4568GQ-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad
- 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):
- 45V
- Voltage - Output (Min/Fixed):
- 1V
- Voltage - Output (Max):
- 45V
- Current - Output:
- 100mA
- Frequency - Switching:
- -
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-QFN (3x3)
MPQ4568GQ-Z FAQ
1.How can I place an order for MPQ4568GQ-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ4568GQ-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 MPQ4568GQ-Z reliable?
The price and inventory of MPQ4568GQ-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPQ4568GQ-Z is usually 5 days.
3.What payment methods are accepted for MPQ4568GQ-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4568GQ-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ4568GQ-Z?
MPQ4568GQ-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ4568GQ-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 MPQ4568GQ-Z?
For technical support, including MPQ4568GQ-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4568GQ-Z requirements.
6.How does Aetrix verify that MPQ4568GQ-Z is sourced from the original manufacturer or authorized distributors?
All MPQ4568GQ-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 MPQ4568GQ-Z meets industry standards.
7.What is the process for return or replacement of MPQ4568GQ-Z?
All MPQ4568GQ-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4568GQ-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 MPQ4568GQ-Z part is unused and in its original packaging.
Return procedure for MPQ4568GQ-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPQ4568GQ-Z Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
