My Inquiry
My Account
Monolithic Power Systems Inc. MP4575GF-Z
- Part No.:
- MP4575GF-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
MP4575GF-Z.pdf
- Description:
- IC REG BUCK ADJ 5A 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,970
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MP4575GF-Z from Monolithic Power Systems is a fully integrated, synchronous step-down DC/DC converter with internal 90mΩ high-side and 70mΩ low-side MOSFETs, delivering up to 5A continuous output current across a 4.5V–55V input range. It employs peak-current-mode control, supports programmable switching frequency (400–640 kHz), and integrates over-voltage, over-current (valley detection), and thermal shutdown protections - used in PoE-powered industrial equipment, automotive ECUs, and high-voltage printer power rails.
For engineers reviewing the MP4575GF-Z datasheet, MP4575GF-Z pinout, MP4575GF-Z application, or MP4575GF-Z equivalent, key selection considerations include its TSSOP-20 EP package with exposed pad, BST bootstrap operation, FREQ pin-based frequency programming, and BIAS-supplied VDD regulation for improved light-load efficiency.
Technical Context
The MP4575GF-Z implements peak-current-mode PWM control with an internal error amplifier (transconductance 380–720 µA/V) and 1V feedback reference. Its oscillator uses an external resistor at FREQ to set switching frequency (400–640 kHz typical), and supports external synchronization (100–1000 kHz) with edge-triggered falling-edge alignment.
It features dual-stage OCP: cycle-by-cycle peak limiting (5.5–11A) plus valley current detection to prevent runaway during short-circuit events, and adaptive current limit scaling (halved at zero VOUT) to reduce thermal stress. The BIAS pin enables optional 5V external supply to raise VDD to 4.8V, improving driver efficiency and thermal performance under heavy load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 55V - supports direct connection to PoE 48V, automotive 42V, and industrial 48V/54V bus rails without pre-regulation. |
| Output Current | 5A continuous - sustained delivery enabled by integrated MOSFETs with RDS(on) of 90mΩ (HS) and 70mΩ (LS), minimizing conduction loss. |
| Switching Frequency | 400–640 kHz (typical, resistor-programmable) - balances EMI control, inductor size, and efficiency; scales down under light load to reduce switching loss. |
| Feedback Reference | 1.0V ±2% - high-precision reference enables accurate output regulation (e.g., 3.3V ±33mV with standard resistor divider). |
| OVP Threshold | 108–122% of VFB - latched shutdown above 110% prevents damage to downstream logic; auto-recovery below 103%. |
| Thermal Shutdown | 150°C (trip), 10°C hysteresis - protects die during overload or poor PCB thermal design; resumes operation only after junction cools to ~140°C. |
| Quiescent Current | 450–670 µA - enables low-power standby modes in always-on systems without compromising startup speed. |
Pinout & Package
The MP4575GF-Z is housed in a thermally enhanced TSSOP-20 EP package with exposed pad (pins 13, 14, 15, and exposed pad tied to GND), enabling >2.7W power dissipation at 25°C ambient when properly soldered to a 4-layer PCB with thermal vias.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 COMP | Compensation node | Connects external RC network to stabilize loop response; sets error amplifier pole-zero locations for stable regulation across line/load transients. |
| 2 FB | Feedback input | Senses output voltage via resistive divider; referenced to precise 1.0V internal bandgap - determines regulated VOUT accuracy and transient recovery behavior. |
| 3 FREQ | Frequency setting/sync input | Resistor-to-GND sets fSW; accepts external clock (100–1000 kHz) for EMI reduction or system-level timing coordination. |
| 4 EN | Enable control | Logic-level input (1.4–1.8V rising threshold); no internal pull-up - requires explicit biasing to avoid floating state and unintended shutdown. |
| 5 BST | Bootstrap supply | Drives high-side MOSFET gate via external 0.1µF capacitor to SW; internal regulator charges BST to 4.2V - critical for HS-FET turn-on reliability. |
| 6–8 VIN | Main power input | Supplies internal regulators and high-side switch; requires local ceramic decoupling (≥10µF X7R + 0.1µF) to suppress switching noise and UVLO glitches. |
| 10–11 SW | Switch node | Drives external inductor; carries full switching current and high dv/dt - must be routed with minimal loop area to reduce EMI and ringing. |
| 13,14,15,EP GND | Power ground | Low-impedance return path for high-side/low-side MOSFET currents; exposed pad must be soldered to large copper pour with ≥6 thermal vias for thermal management. |
| 16 VDD | Driver supply | Internally regulated (3.6V or 4.8V depending on BIAS); powers LS-FET gate driver and BST charging circuit - impacts gate drive strength and efficiency. |
| 17 BIAS | Optional auxiliary supply | When connected to 4.6–5.5V, raises VDD to 4.8V and powers internal circuits directly - reduces VIN current draw and improves light-load efficiency. |
| 18 PG | Power good indicator | Open-drain output asserts high when VOUT reaches 90% of target (±5% hysteresis); used for sequencing, fault reporting, or microcontroller wake-up. |
| 19 SS | Soft-start control | External capacitor sets ramp time (tSS = CSS × 4µA / 1V); overrides internal 0.5ms default - controls inrush current and prevents output overshoot. |
| 20 AGND | Analog ground | Reference for FB, COMP, and internal error amplifier - must be separated from power GND and connected at single point near IC to minimize noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated high- and low-side MOSFETs | Eliminates need for external switches and gate drivers - reduces BOM count, PCB area, and layout complexity in space-constrained industrial modules. |
| Valley-current-detection OCP | Prevents inductor current runaway during output shorts by disabling HS-FET until valley current falls below safe threshold - enhances reliability in unattended systems. |
| Adaptive current limit scaling | Reduces peak current limit to 50% when VOUT ≈ 0V - lowers thermal stress during sustained short-circuit conditions without sacrificing normal-load performance. |
| BIAS-supplied VDD regulation | Enables 4.8V VDD operation from external 5V rail - increases gate drive voltage margin, improves MOSFET RDS(on) utilization, and cuts driver losses by ~25% vs. VIN-derived VDD. |
| Programmable soft-start with external capacitor | Allows precise control of output ramp rate (e.g., 10ms with 2.5nF) - prevents inrush into large output capacitors and avoids brown-out in cascaded power stages. |
Applications
| Industrial Power Systems | PoE-Powered Edge Devices |
|---|---|
Use Scenario: Providing 3.3V/5V rails for PLC I/O modules, motor controllers, and sensor hubs operating from 24V/48V factory bus. IC Role / Device Role / Timing Role: Primary non-isolated buck regulator managing high-efficiency conversion from wide-input industrial supply with robust OVP/OCP. Use Value: Eliminates need for external MOSFETs and drivers while maintaining 5A capability - simplifies compliance with IEC 61000-4-5 surge immunity requirements via integrated protection. | Use Scenario: Powering Ethernet switches, IP cameras, and wireless access points powered via IEEE 802.3at/af PoE (44–57V). IC Role / Device Role / Timing Role: Input-stage buck converter stepping PoE voltage to intermediate 12V or 5V rail before final LDO/post-regulator stage. Use Value: Wide 4.5–55V input range accommodates full PoE voltage envelope; frequency programmability allows EMI tuning to avoid Wi-Fi bands (2.4/5 GHz). |
| Automotive Body Control Modules | High-Voltage Printer Power Supplies |
Use Scenario: Supplying 5V/3.3V to microcontrollers and CAN transceivers in BCMs exposed to 12V/24V battery with load dump transients. IC Role / Device Role / Timing Role: Primary DC/DC regulator handling cold-crank (4.5V) to load-dump (55V) extremes with built-in UVLO and thermal foldback. Use Value: 60V absolute max VIN rating and valley-OCP enable reliable operation without external TVS clamping - reduces component count and board space. | Use Scenario: Generating 24V/48V logic rails and 12V heater supplies in laser printers and multifunction peripherals using high-voltage DC bus. IC Role / Device Role / Timing Role: High-current buck converter powering stepper motor drivers, fuser heaters, and imaging sensors from shared 48V bus. Use Value: 5A output and TSSOP-20 EP package support compact, fanless thermal design - meets ENERGY STAR® standby power limits (<1W) via ultra-low IQ (450µA). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5164QWRGRRQ1 | 4.5–65V input, 1.5A output, integrated 0.58Ω HS/0.28Ω LS MOSFETs - lower current rating and higher RDS(on). | Targeted at automotive AEC-Q100 Grade 1; lacks valley-OCP and BIAS-supplied VDD - less suitable for sustained short-circuit duty. | Select when AEC-Q100 qualification is mandatory and output current ≤1.5A; not drop-in for 5A designs. |
| RT7297CHZSP | 4.5–36V input, 5A output, 70mΩ/40mΩ MOSFETs - narrower VIN range, no BIAS pin, fixed 650kHz fSW. | Optimized for consumer-grade cost-sensitive applications; lacks frequency sync and programmable soft-start - limited EMI flexibility. | Choose for 24V-only systems where BIAS efficiency gain is unnecessary and fixed-frequency operation suffices. |
Compared with LM5164QWRGRRQ1 and RT7297CHZSP, the MP4575GF-Z uniquely combines 55V max input, 5A capability, valley-OCP, and BIAS-enabled VDD boost - making it optimal for high-reliability industrial and PoE systems requiring both wide VIN and robust fault management.
Availability
MP4575GF-Z is available at Aetrix Electronics and suitable for industrial power systems, PoE-powered edge devices, and automotive body control modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MP4575GF-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 analog and power ICs, with core expertise in DC/DC conversion, motor drivers, and LED lighting controllers.
The MP4575 product line targets high-input-voltage, high-current buck applications in industrial automation, PoE infrastructure, and automotive subsystems - designed to replace discrete MOSFET+controller solutions with fully integrated, protection-rich alternatives.
FAQ
What is the minimum recommended input voltage for reliable startup?
The MP4575GF-Z has a VIN UVLO rising threshold of 3.7–4.1V. Reliable startup requires VIN ≥4.1V to ensure the internal regulators (2.5V housekeeping, 3.6V/4.8V VDD) power up correctly and the bootstrap circuit initializes. Below 4.1V, the device remains in shutdown even if EN is asserted.
Can the MP4575GF-Z operate without connecting the BIAS pin?
Yes - the MP4575GF-Z operates normally with BIAS floating or tied to GND. In this mode, VDD is regulated at 3.6V from VIN. Connecting BIAS to 4.6–5.5V raises VDD to 4.8V, improving gate drive strength and light-load efficiency, but is optional for most applications.
How does the external soft-start capacitor affect startup behavior?
The SS pin uses a 4µA constant current to charge an external capacitor; tSS = CSS × 4µA / 1V. For example, a 2.2nF capacitor yields ~8.8ms soft-start. This overrides the internal 0.5ms ramp, preventing output overshoot and limiting inrush into large output capacitors during power-up.
What is the purpose of the valley current detection in over-current protection?
Valley current detection monitors inductor current during the low-side MOSFET conduction phase. If valley current exceeds a threshold, the high-side MOSFET is disabled in the next cycle - preventing current runaway during output shorts or overload, especially when peak limiting alone would allow uncontrolled growth.
Is the MP4575GF-Z pin-compatible with other MPS buck converters?
No - the MP4575GF-Z uses a unique 20-pin TSSOP-20 EP layout optimized for its BST, BIAS, FREQ, and PG functions. Pinouts differ from MPQ4571 (16-pin QFN) and MPQ4572 (16-pin QFN), requiring dedicated PCB layout and compensation network redesign for substitution.
What thermal derating applies above 25°C ambient temperature?
With θJA = 45°C/W on a 4-layer PCB, maximum continuous power dissipation drops linearly: PDMAX = (150°C − TA) / 45°C/W. At 85°C ambient, PDMAX = 1.44W - corresponding to ~3.2A output at 12VIN/3.3VOUT with typical efficiency. Thermal vias under the exposed pad are essential to maintain this rating.
MP4575GF-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width) 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):
- 55V
- Voltage - Output (Min/Fixed):
- 1V
- Voltage - Output (Max):
- 49.5V
- Current - Output:
- 5A
- Frequency - Switching:
- -
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP-EP
MP4575GF-Z FAQ
1.How can I place an order for MP4575GF-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP4575GF-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 MP4575GF-Z reliable?
The price and inventory of MP4575GF-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP4575GF-Z is usually 5 days.
3.What payment methods are accepted for MP4575GF-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP4575GF-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP4575GF-Z?
MP4575GF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP4575GF-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 MP4575GF-Z?
For technical support, including MP4575GF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP4575GF-Z requirements.
6.How does Aetrix verify that MP4575GF-Z is sourced from the original manufacturer or authorized distributors?
All MP4575GF-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 MP4575GF-Z meets industry standards.
7.What is the process for return or replacement of MP4575GF-Z?
All MP4575GF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP4575GF-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 MP4575GF-Z part is unused and in its original packaging.
Return procedure for MP4575GF-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MP4575GF-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…
