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Monolithic Power Systems Inc. MP4569GN
- Part No.:
- MP4569GN
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
MP4569GN.pdf
- Description:
- IC REG BUCK ADJ 300MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,699
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Product details
Overview
MP4569GN 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, 1% FB reference tolerance at room temperature, and 3.5μA shutdown quiescent current. It operates across 4.5V–75V input range and delivers adjustable output voltage via external resistor divider, targeting automotive power rails and industrial distributed supplies.
For engineers reviewing the MP4569GN datasheet, MP4569GN pinout, MP4569GN application, or MP4569GN equivalent, key selection criteria include its wide VIN range, thermal shutdown protection, programmable soft-start, POK output for QFN variants (not present in SOIC-8 EP), and BIAS pin support for efficiency optimization in battery-backed systems.
Technical Context
The MP4569GN implements a current-mode PWM control scheme with zero-current detection (ZCD) to regulate output by comparing FB voltage against a 1V internal reference. Its adaptive switching frequency scaling under light load reduces gate driver and switching losses while maintaining stability.
It integrates an internal 2.6V regulator powered from VIN or optionally from the BIAS pin (≥2.9V), enabling higher efficiency when BIAS is tied to regulated output. The EN pin features 1.55V rising threshold and 1.2V falling threshold with 350mV hysteresis, and includes internal 3MΩ pull-down for default disable.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 75V - supports direct connection to automotive battery (12V/24V/48V) and industrial HV bus without pre-regulation |
| Output Current | 0.3A continuous - sufficient for powering microcontrollers, sensors, and interface ICs in harsh environments |
| FB Reference Voltage | 1.0V ±1% at 25°C - enables precise output regulation with minimal external component drift sensitivity |
| Quiescent Current | 20μA active mode - extends battery life in always-on telematics and ECU modules |
| Shutdown Current | 3.5μA - ensures ultra-low leakage during vehicle sleep modes |
| Switching FETs | 1.2Ω HS / 0.45Ω LS - minimizes conduction loss at full load, supporting >90% peak efficiency at 12V→3.3V |
| Thermal Shutdown | 175°C with 20°C hysteresis - provides fault-tolerant operation under sustained overload or poor heatsinking |
Pinout & Package
MP4569GN uses the SOIC-8 EP (exposed pad) package, thermally enhanced for industrial and automotive ambient temperatures up to +125°C junction. The exposed pad must be soldered to PCB ground plane for optimal thermal performance (θJA = 48°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Power Ground | Primary return path for high-current switch node and feedback network; must connect directly to exposed pad |
| 2 IN | Input Supply | Accepts 4.5V–75V; requires local ceramic decoupling to suppress switching noise on main rail |
| 3 EN | Enable Control | Active-high logic input; floats to disable; internal 3MΩ pull-down ensures safe power-off state |
| 4 FB | Feedback Input | Compares output voltage (via resistive divider) to 1V reference; sets regulation point with ±1% accuracy |
| 5 SS | Soft-Start Control | Connects to capacitor to linearly ramp reference voltage and prevent output overshoot at startup |
| 6 BIAS | Bias Supply Input | Optional external supply ≥2.9V to power internal regulator, improving efficiency over VIN-only operation |
| 7 BST | Bootstrap Supply | Provides floating gate drive for high-side MOSFET; requires 0.1μF ceramic capacitor to SW |
| 8 SW | Switch Node | Drives external inductor; carries high di/dt; must be routed with minimal loop area to reduce EMI |
Key Features
| Feature | Design Value |
|---|---|
| Wide Input Range Support | 4.5V–75V operation enables single design across 12V, 24V, and 48V automotive platforms without redesign |
| Integrated Power FETs | 1.2Ω high-side and 0.45Ω low-side MOSFETs eliminate external discrete switches and reduce BOM count |
| Programmable Soft-Start | External capacitor on SS pin controls startup slew rate, preventing inrush current and output overshoot |
| BIAS Pin Efficiency Boost | Connecting regulated output (2.9V–5.5V) to BIAS bypasses VIN-dependent regulator, reducing dropout and improving light-load efficiency |
| Low Shutdown Quiescent Current | 3.5μA shutdown current meets automotive ISO 16750-2 "sleep mode" requirements for extended battery life |
Applications
| Automotive Body Control Module | Industrial Sensor Node Power |
|---|---|
Use Scenario: Powering MCU, CAN transceiver, and LIN interface in door module with 12V battery input subject to load dump transients. IC Role / Device Role / Timing Role: Primary 3.3V/0.3A buck regulator providing stable rail for digital logic and communication peripherals. Use Value: 75V absolute max input rating withstands ISO 7637-2 pulse 5a (120V transient); 3.5μA shutdown current prevents battery drain during vehicle off-state. | Use Scenario: Local power conversion for wireless vibration sensor node mounted on factory machinery, powered from 24V DC distribution bus. IC Role / Device Role / Timing Role: Step-down regulator delivering 5V/0.3A to MCU and RF SoC, operating continuously in ambient up to +85°C. Use Value: Thermal shutdown (175°C) and 48°C/W θJA ensure reliability under sealed enclosure conditions; BIAS pin allows efficiency boost using local 5V rail. |
| Distributed Telecom Power | Battery-Powered Telematics Unit |
Use Scenario: Intermediate 5V rail generation in remote radio head unit fed from 48V telecom plant battery backup. IC Role / Device Role / Timing Role: Synchronous buck converter regulating 48V down to 5V for FPGA configuration and monitoring circuitry. Use Value: 75V input rating accommodates 48V nominal plus worst-case ripple and surge; 0.45Ω low-side FET minimizes conduction loss at full load. | Use Scenario: GPS/GSM tracker powered by 3.7V Li-ion battery with cold-cranking capability requiring operation down to 4.5V input. IC Role / Device Role / Timing Role: High-efficiency buck converter generating 3.3V system rail, active during data transmission bursts and idle in deep-sleep mode. Use Value: 20μA active IQ and 3.5μA shutdown IQ extend runtime; UVLO hysteresis (0.45V) prevents oscillation during battery sag. |
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-AEC1 | Automotive-grade (AEC-Q100 Grade 1), same electrical specs, QFN-10 package with VREF and POK pins | Includes VREF output and open-drain POK signal - required for systems needing power-good assertion or external reference sharing | Select when AEC-Q100 qualification or POK/VREF functionality is mandatory; not pin-compatible due to different pinout and package |
| LM5164QDDARQ1 | 65V max input, 0.3A, integrated FETs, but 1.5V FB reference and no BIAS pin; higher 50μA IQ | Lacks BIAS pin and soft-start programming - less flexible for efficiency tuning and startup control in sensitive loads | Choose only if LM5164's 1.5V FB simplifies feedback design and AEC-Q100 compliance is needed without POK/VREF |
Compared with MP4569GN, MPQ4569GQ-AEC1 adds automotive qualification and diagnostic outputs but requires PCB redesign, while LM5164QDDARQ1 trades lower IQ and missing BIAS flexibility for TI's ecosystem support and alternate FB architecture.
Availability
MP4569GN is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor nodes, distributed telecom power systems, and battery-powered telematics units requiring stable component supply across extended temperature and voltage ranges.
Supply support for MP4569GN 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 focus on energy-efficient DC/DC conversion, motor drivers, and LED lighting solutions.
The MP4569 belongs to MPS's high-voltage synchronous buck converter product line, designed specifically for automotive and industrial applications demanding wide input range, low quiescent current, and robust thermal protection in compact packages.
FAQ
What is the maximum input voltage the MP4569GN can safely handle?
The MP4569GN has an absolute maximum input voltage rating of +80V, with recommended operation up to 75V. This allows it to survive automotive load-dump transients per ISO 7637-2 Pulse 5a (120V for 400ms) when used with appropriate input clamping, though sustained operation above 75V is not guaranteed.
Does the MP4569GN support adjustable output voltage, and how is it set?
Yes, MP4569GN supports fully adjustable output voltage from 1V to 0.9×VIN using an external resistive divider from VOUT to FB. With a precise 1V ±1% internal reference, output is calculated as VOUT = 1V × (1 + R5/R4), where R4 connects FB to GND and R5 connects VOUT to FB.
Can the MP4569GN operate with input voltage below 5V?
Yes - the MP4569GN's UVLO rising threshold is 4.2V (typical), allowing reliable startup from 4.5V minimum. Below this, the device remains disabled. Its internal regulator functions down to VIN = 3.0V, but full regulation requires VIN ≥ 4.5V per datasheet operating conditions.
Is the BIAS pin required for normal operation?
No - the BIAS pin is optional. When left unconnected, the internal 2.6V regulator draws from VIN. Connecting a stable 2.9V–5.5V source to BIAS improves efficiency by reducing dropout and gate drive losses, especially at light loads or low VIN, but is not mandatory for basic functionality.
How does the soft-start function prevent output overshoot?
The MP4569GN uses a current-source–charged SS capacitor to ramp an internal soft-start voltage from 0V to 1V. During startup, this voltage overrides the FB reference, gradually increasing the target output until reaching regulation - eliminating inrush current and overshoot even with large output capacitors.
What thermal considerations apply to the SOIC-8 EP package?
The SOIC-8 EP package relies on the exposed pad soldered to a PCB copper pour for heat dissipation. With θJA = 48°C/W, a 1W power dissipation raises junction temperature by ~48°C above ambient. For continuous 0.3A output at high VIN/VOUT ratios, thermal relief vias under the pad and ≥2 in² copper area are strongly recommended.
Does MP4569GN include power-good (POK) signaling?
No - POK is only available on the QFN-10 package (MP4569GQ). The SOIC-8 EP variant (MP4569GN) omits the POK pin. System-level power monitoring must be implemented externally using FB voltage sensing or dedicated supervisor ICs.
MP4569GN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Packaging:
- Tube
- 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:
- 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC-EP
MP4569GN FAQ
1.How can I place an order for MP4569GN through Aetrix?
Please submit a Request for Quotation (RFQ) for MP4569GN 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 reliable?
The price and inventory of MP4569GN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP4569GN is usually 5 days.
3.What payment methods are accepted for MP4569GN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP4569GN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP4569GN?
MP4569GN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP4569GN 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?
For technical support, including MP4569GN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP4569GN requirements.
6.How does Aetrix verify that MP4569GN is sourced from the original manufacturer or authorized distributors?
All MP4569GN 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 meets industry standards.
7.What is the process for return or replacement of MP4569GN?
All MP4569GN units undergo pre-shipment inspection (PSI). If there is an issue with MP4569GN, 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 part is unused and in its original packaging.
Return procedure for MP4569GN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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