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Monolithic Power Systems Inc. MP4569GN-P
- Part No.:
- MP4569GN-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
MP4569GN-P.pdf
- Description:
- IC REG BUCK ADJ 300MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,738
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Product details
Overview
MP4569GN-P from Monolithic Power Systems is a 75V input, 0.3A synchronous step-down DC/DC converter with integrated high-side (1.2Ω) and low-side (0.45Ω) MOSFETs, 1V FB reference tolerance (±1% at 25°C), 3.5μA shutdown current, and QFN-10/SOIC-8 EP packaging - designed for automotive power rails requiring wide VIN range and ultra-low quiescent operation.
For engineers reviewing the MP4569GN-P datasheet, MP4569GN-P pinout, MP4569GN-P application, or MP4569GN-P equivalent, this device supports precision adjustable output regulation (1V to 0.9×VIN), programmable soft-start, open-drain POK monitoring, and BIAS-supplied internal regulator optimization in harsh-input environments.
Technical Context
The MP4569GN-P employs a current-mode PWM control scheme with zero-current detection (ZCD) and precision 1V internal reference to regulate output voltage via external resistive divider on FB. Its adaptive frequency scaling under light load reduces switching losses while maintaining stability across 4.5V–75V input.
It integrates dual high-voltage MOSFETs (HS_FET and LS_FET), bootstrap driver with dedicated BST pin, thermal shutdown (175°C trip), and EN-controlled HIGH-logic enable with 1.55V rising threshold and 1.2V falling threshold - all operating from a 2.6V internal regulator powered by VIN or external BIAS ≥2.9V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 75V - supports direct connection to automotive battery (cold-crank down to 4.5V) and industrial 48V/72V rails. |
| Output Current | 0.3A continuous - sufficient for powering microcontrollers, sensors, and CAN transceivers in distributed systems. |
| Feedback Reference | 1.0V ±1% at 25°C - enables accurate output setting (e.g., 3.3V with 1200kΩ/523kΩ divider) with minimal drift over temperature. |
| Quiescent Current | 20μA active / 3.5μA shutdown - extends battery life in always-on telematics and ECU sleep modes. |
| Switching FETs | 1.2Ω HS / 0.45Ω LS MOSFETs - minimize conduction loss at full load while enabling high efficiency (>85% at 12V→3.3V/0.3A). |
| Soft-Start | Programmable via SS capacitor - prevents inrush current and output overshoot during cold start or fault recovery. |
| Power Good (POK) | Open-drain output asserting HIGH when VOUT > 90% of nominal - provides system-level power sequencing and fault indication. |
Pinout & Package
MP4569GN-P is supplied in SOIC-8 EP package with exposed thermal pad. Pin functions are validated per MPS MP4569 Rev. 1.0 datasheet (p.6). The SOIC-8 EP variant omits VREF and POK pins present in QFN-10, aligning with its simplified footprint for cost-sensitive automotive modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Power ground reference | Must be connected directly to output capacitor negative terminal to minimize high-current loop area and EMI. |
| 2 IN | Main input supply | Accepts 4.5–75V; requires local 10μF ceramic decoupling capacitor placed adjacent to pin. |
| 3 EN | Enable control input | High-logic enable (1.55V threshold); floating or pulled low disables IC with 3.5μA shutdown current. |
| 4 FB | Feedback sensing node | Compares output divider voltage against 1V internal reference; sets regulated output voltage. |
| 5 SS | Soft-start timing input | Connects to GND via capacitor (e.g., 100nF → ~20ms ramp) to control startup slew rate. |
| 6 BIAS | Bias supply input | Accepts 2.9–5.5V external supply to power internal regulator - improves efficiency vs. VIN-only operation. |
| 7 BST | Bootstrap supply | Charges high-side gate driver via external capacitor to SW; requires 0.1μF X7R ceramic between BST and SW. |
| 8 SW | Switch node | Drives external inductor; connects to BST capacitor and inductor; high di/dt node requiring tight layout. |
Key Features
| Feature | Design Value |
|---|---|
| Wide input range | 4.5V–75V operation accommodates automotive battery transients (load dump, cold crank) without external pre-regulator. |
| Integrated power stage | Monolithic 1.2Ω/0.45Ω MOSFET pair eliminates external switch selection, gate drive design, and layout complexity. |
| Ultra-low IQ | 20μA active and 3.5μA shutdown current enable multi-year battery life in always-on vehicle subsystems. |
| Adaptive frequency scaling | Reduces switching frequency under light load to maintain >80% efficiency down to 1mA output current. |
| Thermal protection | 175°C junction shutdown with 20°C hysteresis ensures reliable operation during overload or poor heatsinking. |
Applications
| Automotive Body Control Module | Industrial Sensor Node Power |
|---|---|
|
Use Scenario: Powering MCU, LIN transceiver, and door lock actuator drivers from 12V battery with cold-crank resilience. IC Role / Device Role / Timing Role: Primary 3.3V/0.3A buck regulator providing stable rail during engine start (VIN dip to 4.5V). Use Value: 3.5μA shutdown current preserves battery during weeks of vehicle inactivity; UVLO hysteresis prevents chatter during cranking. |
Use Scenario: Converting 24V industrial bus to 5V for analog sensor signal conditioning and ADC reference. IC Role / Device Role / Timing Role: Synchronous step-down converter delivering precise 5V output with <1% FB tolerance over –40°C to +125°C. Use Value: Integrated 0.45Ω low-side FET minimizes dropout and thermal rise in enclosed enclosures; BIAS pin allows efficiency boost using regulated 5V output. |
| Distributed Telematics Unit | Battery-Powered Data Logger |
|
Use Scenario: Supplying GPS module, cellular modem, and flash memory from 48V truck electrical system. IC Role / Device Role / Timing Role: High-input buck regulator stepping 48V down to 3.3V with POK monitoring for system health reporting. Use Value: POK open-drain output signals valid 3.3V rail to host processor; 75V absolute max rating withstands 60V load-dump transients. |
Use Scenario: Long-life environmental monitor powered by Li-SOCl₂ battery (3.6V nominal, up to 3.9V fully charged). IC Role / Device Role / Timing Role: Step-up/down capable regulator (via external divider) generating stable 3.3V from variable battery source. Use Value: 20μA quiescent current enables >10-year operational life; programmable soft-start prevents wake-up current surge from depleting battery. |
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 |
|---|---|---|---|
| LM5164QDDARQ1 | 4.5–65V input, 0.3A, 1.5MHz fixed freq, no integrated low-side FET - requires external sync rectifier. | Lacks integrated LS_FET and POK; higher BOM count and layout sensitivity; better EMI control via fixed frequency. | Select when strict EMI compliance (CISPR 25 Class 5) is required and board space permits external FET + Schottky. |
| TPS54340BQDDAQ1 | 3.5–42V input, 3.5A, 100kHz–2.5MHz adjustable freq, no VREF/POK pins - higher current but narrower VIN range. | Cannot support 75V transients or automotive cold-crank; lacks POK and BIAS optimization; superior thermal performance at high load. | Choose for 12V/24V systems needing >0.3A output where transient immunity is less critical than peak current capability. |
Compared with LM5164QDDARQ1 and TPS54340BQDDAQ1, MP4569GN-P uniquely combines 75V rating, monolithic dual-FET integration, POK monitoring, and sub-4μA shutdown - making it optimal for space-constrained, battery-sensitive automotive modules where input resilience and system-level status signaling are mandatory.
Availability
MP4569GN-P is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor nodes, distributed telematics units, and battery-powered data loggers requiring stable component supply across extended temperature and high-reliability lifecycles.
Supply support for MP4569GN-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 core expertise in DC/DC conversion, motor drivers, and LED lighting controllers.
The MP4569 belongs to MPS's high-voltage synchronous buck converter product line, engineered specifically for automotive and industrial applications demanding wide input range, ultra-low quiescent current, and robust fault protection.
FAQ
What is the maximum allowable input voltage for MP4569GN-P?
The absolute maximum input voltage is +80V, but the recommended operating range is 4.5V to 75V. Operation above 75V risks exceeding safe operating area limits during transients, even though the device survives short-duration 80V spikes per Absolute Maximum Ratings.
Does MP4569GN-P support adjustable output voltage?
Yes - output voltage is set externally via a resistive divider from VOUT to FB pin, referenced to the internal 1.0V ±1% feedback voltage. Common values like 3.3V (R4=1200kΩ, R5=523kΩ) and 5V (R4=1200kΩ, R5=300kΩ) are validated in the datasheet.
How does the BIAS pin improve efficiency?
When supplied with 2.9–5.5V (e.g., from regulated output), BIAS powers the internal 2.6V regulator instead of VIN, reducing power loss in the bias generation circuitry and improving full-load efficiency by up to 2.5% compared to VIN-only operation.
Is thermal shutdown latched or auto-recovering?
Thermal shutdown is auto-recovering: the device shuts down at 175°C junction temperature and resumes normal operation once die temperature falls below 155°C (20°C hysteresis), enabling fault-tolerant behavior without external reset circuitry.
Can MP4569GN-P operate with no external soft-start capacitor?
No - the SS pin must be connected to GND via a capacitor (minimum 100pF). Leaving SS floating or unconnected causes undefined startup behavior and potential output overshoot due to missing controlled reference ramp.
What is the purpose of the BST pin and required external component?
BST supplies gate drive voltage to the high-side MOSFET. A 0.1μF X7R ceramic capacitor must be placed between BST and SW pins to provide charge storage for the floating driver; incorrect placement or value causes HS_FET turn-on failure and thermal runaway.
Does MP4569GN-P include output overvoltage protection?
Yes - the FB pin has overvoltage protection that triggers at 1.05–1.1V (50mV hysteresis), disabling switching if feedback voltage exceeds nominal by >5%. This protects downstream loads from regulator fault-induced overvoltage events.
MP4569GN-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- MP
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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):
- 75V
- Voltage - Output (Min/Fixed):
- 1V
- Voltage - Output (Max):
- 67.5V
- Current - Output:
- 300mA
- Frequency - Switching:
- -
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC-EP
MP4569GN-P FAQ
1.How can I place an order for MP4569GN-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MP4569GN-P 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 MP4569GN-P reliable?
The price and inventory of MP4569GN-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP4569GN-P is usually 5 days.
3.What payment methods are accepted for MP4569GN-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP4569GN-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP4569GN-P?
MP4569GN-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP4569GN-P 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 MP4569GN-P?
For technical support, including MP4569GN-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP4569GN-P requirements.
6.How does Aetrix verify that MP4569GN-P is sourced from the original manufacturer or authorized distributors?
All MP4569GN-P 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 MP4569GN-P meets industry standards.
7.What is the process for return or replacement of MP4569GN-P?
All MP4569GN-P units undergo pre-shipment inspection (PSI). If there is an issue with MP4569GN-P, 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 MP4569GN-P part is unused and in its original packaging.
Return procedure for MP4569GN-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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