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Monolithic Power Systems Inc. MP1472GJ-P
- Part No.:
- MP1472GJ-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
MP1472GJ-P.pdf
- Description:
- IC REG BUCK ADJ 2A TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:325
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Product details
Overview
MP1472GJ-P from Monolithic Power Systems is a synchronous step-down DC/DC converter integrating 175mΩ high-side and 115mΩ low-side MOSFETs, delivering 2A continuous output current across 4.75V–18V input range with fixed 340kHz switching frequency and 0.923V feedback reference. It regulates down to 0.923V output in TSOT23-8 package for FPGA/DSP core power supplies.
For engineers reviewing the MP1472GJ-P datasheet, MP1472GJ-P pinout, MP1472GJ-P application, or MP1472GJ-P equivalent, key selection criteria include input UVLO threshold (3.8V), soft-start programmability via external capacitor, cycle-by-cycle overcurrent protection, and compatibility with low-ESR ceramic output capacitors.
Technical Context
The MP1472GJ-P employs current-mode control architecture with internal transconductance error amplifier (800μA/V) and COMP-pin-based loop compensation, enabling fast transient response and stable regulation across wide load and line variations. Its functional block includes integrated high-side and low-side N-channel MOSFETs, bootstrap gate drive circuitry (BS pin), and dedicated soft-start (SS) and enable (EN) logic.
It features dual protection mechanisms: input under-voltage lockout (UVLO) with 3.8V turn-on threshold and 210mV hysteresis, plus thermal shutdown at 160°C. The device operates with fixed 340kHz oscillator frequency and supports adjustable output voltage (0.923V–15V) via resistive divider on FB pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 2A continuous - sufficient for powering FPGA I/O banks or DSP memory interfaces without external current boosting. |
| Input Voltage Range | 4.75V to 18V - supports 5V, 12V, and 15V intermediate bus architectures in networking and industrial systems. |
| Feedback Reference | 0.923V ±2.5% - enables precise low-voltage regulation (e.g., 1.8V, 3.3V) using standard resistor tolerances. |
| Switching Frequency | 340kHz (±10%) - balances EMI performance and inductor size; avoids AM radio band while enabling compact LC filter design. |
| High-Side RDS(on) | 175mΩ - limits conduction loss at 2A load to ~700mW, supporting >90% efficiency at mid-load with proper layout. |
| Shutdown Current | 1μA - enables ultra-low-power standby in battery-backed or energy-sensitive applications. |
| Soft-Start Time | 15ms with 0.1μF SS capacitor - prevents inrush current into downstream capacitance up to ~1000μF. |
Pinout & Package
MP1472GJ-P is housed in an 8-pin TSOT23-8 package with exposed thermal pad (pin 5 GND connected to pad). Package dimensions: 2.9mm × 1.6mm × 0.85mm, pitch 0.65mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SS | Soft-Start Control Input | Capacitor-connected node setting soft-start duration; open-circuit disables soft-start. |
| 2 EN | Enable Digital Input | Active-high logic control; 1.5V threshold with 210mV hysteresis ensures noise-immune startup sequencing. |
| 3 COMP | Compensation Node | Output of internal error amplifier; RC network here sets loop stability and transient response. |
| 4 FB | Feedback Input | Senses divided output voltage; 0.923V reference defines regulation point for all output configurations. |
| 5 GND | Power and Signal Ground | Common return for all internal circuits and thermal path; must connect to large copper area for thermal relief. |
| 6 SW | Switching Node Output | Drives external inductor; high dv/dt node requiring tight layout to minimize EMI and shoot-through risk. |
| 7 IN | Main Power Input | Supplies IC bias and switch drivers; requires local 10μF ceramic bypass capacitor near pin. |
| 8 BS | Bootstrap Supply Input | Connects to SW via 0.01μF capacitor to generate gate drive voltage >VIN for high-side MOSFET. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power Switches | Monolithic 175mΩ/115mΩ N-MOSFET pair eliminates external driver and discrete FET layout complexity. |
| Cycle-by-Cycle Current Limit | 4.1A minimum limit protects against short-circuit faults without latch-off, enabling auto-recovery behavior. |
| Stable with Ceramic Capacitors | Supports low-ESR ceramic output caps (e.g., 22μF X5R) without external compensation components in most cases. |
| Fixed 340kHz Oscillator | Enables predictable EMI profile and simplifies filter design versus variable-frequency alternatives. |
| Programmable Soft-Start | Adjustable via single external capacitor (e.g., 0.1μF = 15ms), preventing input rail collapse during power-up. |
Applications
| FPGA Core Power Supply | DSP I/O Voltage Regulation |
|---|---|
Use Scenario: Providing clean, tightly regulated 1.2V supply to Xilinx Artix-7 FPGA core logic under dynamic load conditions. IC Role / Device Role / Timing Role: Primary synchronous buck regulator controlling output voltage via FB divider; COMP loop maintains <1% regulation accuracy during 1A load transients. Use Value: Delivers 2A peak current with <50mV output ripple using 10μH inductor and 22μF ceramic cap, meeting FPGA core VCCINT spec. |
Use Scenario: Generating 3.3V I/O supply for TI C6748 DSP with burst-mode memory access causing 0.5A/μs load steps. IC Role / Device Role / Timing Role: Step-down converter with current-mode control and 340kHz switching providing sub-10μs transient recovery time. Use Value: Achieves <2% output deviation during 1.5A load step due to fast COMP-loop response and low RDS(on) switches. |
| Industrial Networking Switch ASIC | Green Appliance MCU Power Rail |
Use Scenario: Powering Broadcom BCM56xx switch ASIC auxiliary rails (1.8V, 2.5V) from 12V backplane in PoE+ infrastructure. IC Role / Device Role / Timing Role: Distributed point-of-load regulator with UVLO (3.8V) ensuring operation only when primary 12V rail is stable. Use Value: Maintains regulation across 4.75–18V input swing caused by PoE cable drop, with >92% efficiency at 1.5A load. |
Use Scenario: Supplying 5.0V rail to ARM Cortex-M7 MCU and sensor interface in ENERGY STAR–certified smart thermostat. IC Role / Device Role / Timing Role: High-efficiency buck converter operating in discontinuous conduction mode at light loads to meet <100μA system standby target. Use Value: Draws only 1μA in shutdown and sustains >85% efficiency at 10mA load via optimized light-load biasing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP1476GJ-Z | Successor with improved 3.5A rating, 500kHz switching, and lower RDS(on) (120mΩ/75mΩ); same TSOT23-8 footprint. | Supports higher current FPGA cores and faster transient loads; requires updated compensation due to higher fSW. | Select MP1476GJ-Z for new designs needing >2A capability or tighter EMI control via higher fSW. |
| TPS562201DDCR | Texas Instruments part with 2A rating, 500kHz fSW, 0.6V reference, and integrated boot diode; SOT-23-6 package. | Smaller package but no BST pin - eliminates external boost cap; lower reference enables sub-1V outputs. | Choose TPS562201DDCR when board space is constrained and 0.6V feedback suffices for target output voltage. |
Compared with MP1472GJ-P, MP1476GJ-Z offers higher current and efficiency at cost of revised loop compensation, while TPS562201DDCR trades integration depth (no BST pin) for smaller footprint and lower reference voltage - both require schematic and layout updates.
Availability
MP1472GJ-P is available at Aetrix Electronics and suitable for FPGA power supplies, DSP I/O regulation, and industrial networking switch ASICs requiring stable component supply with long-term lifecycle visibility.
Supply support for MP1472GJ-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, headquartered in California with global design and support centers.
The MP1472 belongs to MPS's synchronous buck regulator product line, designed specifically for space-constrained, high-efficiency point-of-load applications in computing, networking, and industrial equipment.
FAQ
What is the maximum recommended output voltage for MP1472GJ-P?
The MP1472GJ-P supports output voltages up to 15V, set by the FB resistive divider ratio. This limit arises from internal voltage stress constraints on the error amplifier and COMP node; exceeding 15V risks violating absolute maximum ratings on FB and COMP pins, even if the external divider is correctly scaled.
Can MP1472GJ-P operate with a 3.3V input supply?
No - MP1472GJ-P has a minimum input voltage of 4.75V per its absolute maximum and recommended operating conditions. At 3.3V input, the internal UVLO circuit prevents startup, and the high-side MOSFET cannot be properly biased due to insufficient headroom for the bootstrap circuit.
Is an external bootstrap diode required for MP1472GJ-P?
An external bootstrap diode (e.g., IN4148) is optional but recommended when duty cycle exceeds 65%, such as in 3.3V or 5V outputs from 12V input. It improves high-side gate drive strength and efficiency by reducing BST capacitor discharge during high-duty cycles.
What is the purpose of the SS pin, and how is it configured?
The SS pin controls soft-start duration via an external capacitor to GND. A 0.1μF capacitor yields 15ms ramp time; leaving SS open disables soft-start entirely. This pin directly charges the internal soft-start capacitor, preventing output overshoot and inrush current into bulk capacitance.
How does the MP1472GJ-P handle overcurrent conditions?
MP1472GJ-P implements cycle-by-cycle overcurrent protection that limits peak switch current to ≥4.1A. During overload, the controller skips switching cycles once current sense exceeds threshold, maintaining regulation until fault clears - no latch-off or external reset required.
Why is the TSOT23-8 package thermally critical for MP1472GJ-P?
The TSOT23-8 package has θJA = 100°C/W; without proper PCB copper pour on the exposed GND pad, junction temperature can exceed 125°C at full 2A load. Thermal performance depends entirely on soldered GND pad area and internal layer copper connections - not ambient airflow.
Does MP1472GJ-P support forced PWM mode at light loads?
No - MP1472GJ-P operates exclusively in current-mode PWM mode and does not feature pulse-skipping or forced continuous conduction mode (FCCM). At light loads, it naturally enters discontinuous conduction mode (DCM), reducing switching losses but increasing output voltage ripple.
MP1472GJ-P 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:
- Not For New Designs
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.75V
- Voltage - Input (Max):
- 18V
- Voltage - Output (Min/Fixed):
- 0.923V
- Voltage - Output (Max):
- 15V
- Current - Output:
- 2A
- Frequency - Switching:
- 340kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-8
MP1472GJ-P FAQ
1.How can I place an order for MP1472GJ-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MP1472GJ-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 MP1472GJ-P reliable?
The price and inventory of MP1472GJ-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP1472GJ-P is usually 5 days.
3.What payment methods are accepted for MP1472GJ-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP1472GJ-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP1472GJ-P?
MP1472GJ-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP1472GJ-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 MP1472GJ-P?
For technical support, including MP1472GJ-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP1472GJ-P requirements.
6.How does Aetrix verify that MP1472GJ-P is sourced from the original manufacturer or authorized distributors?
All MP1472GJ-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 MP1472GJ-P meets industry standards.
7.What is the process for return or replacement of MP1472GJ-P?
All MP1472GJ-P units undergo pre-shipment inspection (PSI). If there is an issue with MP1472GJ-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 MP1472GJ-P part is unused and in its original packaging.
Return procedure for MP1472GJ-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MP1472GJ-P Tags
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