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Monolithic Power Systems Inc. MP1495SGJ-P
- Part No.:
- MP1495SGJ-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
MP1495SGJ-P.pdf
- Description:
- IC REG BUCK ADJ 3A TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:3,700
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Product details
Overview
MP1495SGJ-P from Monolithic Power Systems is a synchronous step-down DC/DC converter IC with integrated 120mΩ high-side and 50mΩ low-side MOSFETs, delivering up to 3A continuous output current across a 4.5V–16V input range, fixed 500kHz switching frequency, and adjustable output voltage down to 0.8V - deployed in notebook I/O power rails and flat-panel display bias supplies.
For engineers reviewing the MP1495SGJ-P datasheet, MP1495SGJ-P pinout, MP1495SGJ-P application, or MP1495SGJ-P equivalent, this device supports AAM power-save mode, external clock synchronization (300kHz–2MHz), internal soft-start (1.5ms), thermal shutdown (150°C), and hiccup-mode over-current protection - critical for compact, thermally constrained point-of-load designs.
Technical Context
The MP1495SGJ-P employs peak-current-mode control with an internal 0.807V feedback reference and optimized compensation, enabling stable regulation without external loop components. Its current-mode architecture delivers fast transient response and simplifies stability design across varying output capacitance and ESR.
It integrates a 5V internal VCC regulator powered from VIN, bootstrap circuitry with BST-SW capacitor charging, and EN/SYNC pin combining enable logic and external clock input - supporting both standalone operation and system-level frequency coordination in multi-rail power architectures.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 16V - supports wide industrial and consumer input rails including 5V, 12V, and 15V systems. |
| Output Current | 3A continuous - sufficient for powering core logic, DDR memory termination, or display backlight drivers. |
| Switching Frequency | Fixed 500kHz (±18%) - balances efficiency, size, and EMI; synchronizable to 300kHz–2MHz external clock. |
| Feedback Reference | 0.807V ±1.5% - enables precise output voltage setting via resistor divider; supports 0.8V minimum VOUT. |
| Internal MOSFET RDS(ON) | HS: 120mΩ, LS: 50mΩ - reduces conduction loss and improves full-load efficiency (>92% typical at 12V→3.3V/3A). |
| Protection Features | OCP with hiccup mode, thermal shutdown (150°C), UVLO (3.8V rising), and internal soft-start (1.5ms) - ensures robust startup and fault recovery. |
| Quiescent Current | 1μA in shutdown, 0.5–1mA in quiescent - suitable for battery-backed or always-on auxiliary rails. |
Pinout & Package
MP1495SGJ-P is housed in an 8-pin TSOT-23 package (3.0mm × 3.0mm × 0.9mm), optimized for high-density PCB layouts with exposed thermal pad (GND-connected) for enhanced thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - AAM | Advanced Asynchronous Modulation control | Configures light-load operation mode: low voltage forces AAM (improved ripple/stability); high voltage forces CCM (better transient response). |
| 2 - IN | Main input supply rail | Accepts 4.5V–16V; requires local 22μF ceramic + 0.1μF decoupling; routed with wide trace to minimize impedance. |
| 3 - SW | Switch node | Connects to external inductor and bootstrap capacitor; high dv/dt node requiring careful layout to avoid coupling into FB/EN. |
| 4 - GND | Power and signal ground reference | Primary return path for power switches and feedback; must connect directly to large ground plane with multiple vias. |
| 5 - BST | Bootstrap supply for high-side driver | Requires 0.1μF capacitor between BST and SW; 10Ω series resistor recommended to damp ringing. |
| 6 - EN/SYNC | Enable input / external clock input | Logic-high (>1.15V) enables operation; external 300kHz–2MHz clock synchronizes switching edge; internal 1MΩ pull-down. |
| 7 - VCC | Bias supply for internal circuitry | Internally regulated 5V output; requires 0.1–0.22μF ceramic capacitor placed adjacent to pin and GND. |
| 8 - FB | Feedback input | Monitors output via resistor divider; internal 0.807V reference sets VOUT = 0.807V × (1 + R1/R2); sensitive analog node requiring short trace routing. |
Key Features
| Feature | Design Value |
|---|---|
| AAM Power-Save Mode | Automatically transitions to discontinuous conduction mode under light loads, reducing switching losses while maintaining <10mV output ripple. |
| Synchronous Rectification | Integrated 120mΩ/50mΩ MOSFET pair eliminates external diode, improving efficiency by 8–12% vs. asynchronous designs at 1A–3A loads. |
| External Clock Synchronization | EN/SYNC pin accepts 300kHz–2MHz external clock, enabling noise-sensitive applications (e.g., audio, imaging) to avoid beat frequencies. |
| Internal Soft-Start | 1.5ms ramp time prevents inrush current and output overshoot during startup - no external capacitor required. |
| Hiccup-Mode OCP | After current limit trip, device enters periodic restart cycle (not latch-off), limiting average short-circuit power dissipation to <0.5W. |
Applications
| Notebook I/O Power Rail | Digital Set-Top Box SoC Core Supply |
|---|---|
|
Use Scenario: Powers USB controller, PCIe switch, or SATA PHY in ultrabook platforms with tight board space and thermal limits. IC Role / Device Role / Timing Role: Primary buck regulator delivering 3.3V/3A from 12V main rail; operates in CCM for load transients and AAM for idle states. Use Value: Achieves >93% efficiency at 2A load and maintains <15mV output ripple across 0–3A, eliminating need for secondary LDO post-regulation. |
Use Scenario: Supplies 1.2V/3A to ARM-based media processor in cable/satellite STB with standby power budget <50mW. IC Role / Device Role / Timing Role: Point-of-load converter with EN controlled by system PMIC; uses AAM mode during video decode idle cycles. Use Value: Reduces no-load input current to 1μA (shutdown) and 350μA (AAM), meeting EnergyStar Tier 2 standby requirements. |
| Flat-Panel Monitor Logic Supply | Distributed Telecom Power System |
|
Use Scenario: Generates 5V/3A for timing controller (TCON) and interface circuitry in 24-inch LCD monitor with 12V input bus. IC Role / Device Role / Timing Role: Fixed-frequency buck with SYNC tied to system clock to suppress conducted EMI in EMC-critical display subsystem. Use Value: Enables 50dB reduction in 500kHz harmonic emissions when synchronized, passing CISPR-32 Class B without added filtering. |
Use Scenario: Provides isolated 3.3V/3A auxiliary rail in 48V intermediate bus telecom system using discrete front-end DC/DC stage. IC Role / Device Role / Timing Role: Secondary buck regulator downstream of 48V→12V primary; EN driven by hot-swap controller for inrush management. Use Value: Thermal shutdown (150°C) and hiccup OCP ensure safe operation during sustained overload in fanless chassis environments. |
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 |
|---|---|---|---|
| RT6220AGQW | Higher 20V max input, 4A rating, but larger QFN-16 package and no AAM mode - requires external compensation. | Better suited for 19V adapter-fed systems; lacks light-load efficiency optimization for always-on displays. | Select when input exceeds 16V or output current >3A is needed; accept larger footprint and higher BOM count. |
| TPS54331DR | 3.5–28V input, 3A, 570kHz, but asynchronous (external diode), no AAM, and 16-pin SOIC package. | Lower cost for non-compact designs; less efficient at light loads due to diode conduction loss. | Choose for legacy designs where thermal margin is ample and 500kHz EMI alignment is not required. |
Compared with RT6220AGQW and TPS54331DR, MP1495SGJ-P offers superior light-load efficiency via AAM, smallest footprint (TSOT-23-8), and built-in synchronization - making it optimal for space-constrained, EMI-sensitive, and battery-aware applications where 4.5–16V input and ≤3A output are sufficient.
Availability
MP1495SGJ-P is available at Aetrix Electronics and suitable for notebook I/O power, digital set-top box SoC supplies, flat-panel monitor logic rails, and distributed telecom auxiliary power requiring stable component supply, consistent lead times, and long-term lifecycle support.
Supply support for MP1495SGJ-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 mixed-signal ICs for power management, motion control, and automotive applications.
The MP1495S product line targets compact, high-efficiency DC/DC conversion in consumer and computing systems - designed to replace linear regulators and discrete buck solutions with minimal external components and industry-leading thermal performance in ultra-small packages.
FAQ
What is the minimum output voltage achievable with MP1495SGJ-P?
The MP1495SGJ-P supports output voltages down to 0.8V, set by the internal 0.807V feedback reference and external resistor divider. The datasheet specifies guaranteed operation from 0.8V to VIN × 95%, with typical accuracy of ±1.5% over temperature and line variations. For sub-0.8V outputs, external reference injection is not supported.
Does MP1495SGJ-P require an external bootstrap diode?
No. The MP1495SGJ-P integrates bootstrap charging circuitry that regulates BST voltage using internal FETs and does not require an external diode. A 0.1μF ceramic capacitor between BST and SW pins suffices; adding a 10Ω series resistor is strongly recommended to reduce SW node ringing and improve reliability.
How does AAM mode affect output voltage ripple?
In AAM mode, the MP1495SGJ-P reduces switching frequency under light loads, increasing ripple period but lowering RMS ripple current. Typical output ripple rises from ~10mV (CCM, 3A) to ~25mV (AAM, 100mA), remaining within specification due to internal compensation and low-ESR ceramic output capacitors.
Can MP1495SGJ-P operate with input voltage below 4.5V?
No. The absolute minimum operating input voltage is 4.5V per datasheet specifications. Below this, the internal UVLO disables operation - the rising threshold is 3.8V with 650mV hysteresis, but functional regulation only begins above 4.5V to ensure stable VCC regulation and gate drive strength.
What is the maximum allowable junction temperature during continuous operation?
The MP1495SGJ-P thermal shutdown activates at 150°C junction temperature, with 20°C hysteresis (re-enabling at ~130°C). Continuous operation should be limited to ≤125°C junction temperature per recommended operating conditions; derating is required above 85°C ambient depending on θJA (100°C/W for TSOT-23-8).
Is the EN/SYNC pin 5V-tolerant?
The EN/SYNC pin includes an internal 6.5V Zener clamp, making it tolerant to voltages up to 6.5V. Driving it directly from a 5V source is safe; for 12V systems, a pull-up resistor ≥55kΩ is required to limit current to <100μA and prevent Zener overstress.
What is the purpose of the T-type feedback network shown in the datasheet?
The T-type network (R1, R2, Rt) replaces standard two-resistor dividers for low-output-voltage configurations (<1.2V), improving feedback accuracy and loop stability by reducing the effect of FB pin bias current (30–65nA) on voltage division ratio.
MP1495SGJ-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:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 15.2V
- Current - Output:
- 3A
- Frequency - Switching:
- 500kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-8
MP1495SGJ-P FAQ
1.How can I place an order for MP1495SGJ-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MP1495SGJ-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 MP1495SGJ-P reliable?
The price and inventory of MP1495SGJ-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP1495SGJ-P is usually 5 days.
3.What payment methods are accepted for MP1495SGJ-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP1495SGJ-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP1495SGJ-P?
MP1495SGJ-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP1495SGJ-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 MP1495SGJ-P?
For technical support, including MP1495SGJ-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP1495SGJ-P requirements.
6.How does Aetrix verify that MP1495SGJ-P is sourced from the original manufacturer or authorized distributors?
All MP1495SGJ-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 MP1495SGJ-P meets industry standards.
7.What is the process for return or replacement of MP1495SGJ-P?
All MP1495SGJ-P units undergo pre-shipment inspection (PSI). If there is an issue with MP1495SGJ-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 MP1495SGJ-P part is unused and in its original packaging.
Return procedure for MP1495SGJ-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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