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Monolithic Power Systems Inc. MP1495SGJ-Z
- Part No.:
- MP1495SGJ-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
MP1495SGJ-Z.pdf
- Description:
- IC REG BUCK ADJ 3A TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:3,495
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Product details
Overview
MP1495SGJ-Z 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 - used in notebook I/O power rails and flat-panel display bias supplies.
For engineers reviewing the MP1495SGJ-Z datasheet, MP1495SGJ-Z pinout, MP1495SGJ-Z application, or MP1495SGJ-Z 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-Z employs peak-current-mode control with an internal 500kHz oscillator and cycle-by-cycle current limiting, enabling fast transient response and stable loop compensation without external components. Its integrated bootstrap driver powers the high-side gate using a capacitor between SW and BST pins, with internal UVLO (2.2V) and clamping to ensure reliable high-side switching.
It features dual regulation paths: the error amplifier compares FB voltage against a precision 0.807V reference (±1.5% over temperature), while the AAM pin enables modulation mode selection between asynchronous light-load operation and forced CCM - directly influencing efficiency vs. ripple trade-offs at sub-100mA loads.
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 without pre-regulation. |
| Output Current | 3A continuous - sufficient for powering core logic, DDR memory termination, or FPGA I/O banks in space-constrained designs. |
| Switching Frequency | Fixed 500kHz (±18%) - balances inductor size, EMI, and efficiency; synchronizable to 300kHz–2MHz external clock for noise avoidance. |
| Feedback Reference | 0.807V ±1.5% - enables accurate output setting from 0.8V to VIN×0.95 with minimal resistor divider error impact. |
| RDS(ON) | 120mΩ (HS) / 50mΩ (LS) - reduces conduction loss at full load, supporting >90% efficiency at 12VIN/3.3VOUT/2A. |
| Soft-Start Time | 1.5ms - prevents output overshoot and inrush current during power-up, eliminating need for external timing components. |
| Thermal Shutdown | 150°C with 20°C hysteresis - protects die under sustained overload or poor PCB thermal design; auto-recovery at ~130°C. |
| OCP Threshold | 4.5A to 6A (typ. 5.2A) - provides robust short-circuit protection with hiccup mode to limit average fault current and die temperature rise. |
Pinout & Package
MP1495SGJ-Z is housed in an 8-pin TSOT-23 package (2.9mm × 1.6mm × 0.85mm), optimized for high-density PCB layouts with exposed pad thermal enhancement (θJA = 100°C/W on 4-layer board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - AAM | Asynchronous Modulation Control | Set voltage (typically 0.5V) to force transition between AAM (light-load efficiency) and CCM (full-load stability); not a digital enable. |
| 2 - IN | Main Input Supply | Accepts 4.5V–16V; requires local 22μF ceramic + 0.1μF high-frequency decoupling; routed with wide trace to minimize impedance. |
| 3 - SW | Switch Node | Drives external inductor; high dv/dt node - must be kept short, away from analog traces (FB, AAM), and adjacent to GND pour. |
| 4 - GND | Power & Signal Ground | Common return for IN, VCC, FB, and output; requires low-inductance connection to PCB ground plane via multiple vias. |
| 5 - BST | Bootstrap Supply | Connects to SW via 0.1μF capacitor; internal charge pump generates floating gate drive for HS MOSFET; 10Ω series resistor recommended. |
| 6 - EN/SYNC | Enable & Clock Input | Logic-high (>1.15V) enables regulator; external 300kHz–2MHz clock applied here synchronizes switching edge; internal 1MΩ pulldown. |
| 7 - VCC | Bias Regulator Output | 5V internal LDO output; powers control circuitry; requires 0.1–0.22μF ceramic cap placed <1mm from pin to GND. |
| 8 - FB | Feedback Input | Monitors resistor divider output; internal 0.807V reference sets VOUT = 0.807V × (1 + R1/R2); sensitive to noise - route shortest possible. |
Key Features
| Feature | Design Value |
|---|---|
| AAM Power-Save Mode | Reduces light-load quiescent current to 0.5mA while maintaining regulation - extends battery life in always-on subsystems. |
| Synchronous Rectification | Eliminates external Schottky diode; 50mΩ LS MOSFET cuts conduction loss by >40% vs. diode-based solutions at 1A+ loads. |
| Internal Soft-Start | 1.5ms ramp prevents output overshoot and inductor saturation during startup - no external capacitor or resistor needed. |
| Frequency Fold-Back | Reduces fSW to ~250kHz when FB < 400mV (e.g., short-circuit), limiting peak inductor current and thermal stress. |
| Integrated Bootstrap Driver | Self-contained floating gate drive with 2.2V BST UVLO ensures reliable HS turn-on even during deep line transients. |
| Hiccup-Mode OCP | After current-limit trip, device shuts down for ~10ms then retries - limits average fault power to <1W during sustained shorts. |
Applications
| Notebook I/O Power | Digital Set-Top Box SoC Core |
|---|---|
Use Scenario: Supplies 3.3V/2A to USB controller, PCIe switch, and SATA PHY in ultrabook motherboard. IC Role / Device Role / Timing Role: Primary point-of-load regulator converting 12V main rail to low-noise 3.3V with tight line/load regulation. Use Value: Integrated MOSFETs and 500kHz switching allow <8mm² solution size; AAM mode maintains >85% efficiency at 50mA standby load. |
Use Scenario: Powers 1.2V/3A ARM Cortex-A53 cluster in cable box SoC under dynamic video decoding load. IC Role / Device Role / Timing Role: High-efficiency buck converter with fast transient response to handle CPU burst currents up to 3A within 10μs. Use Value: Peak-current-mode control and 1.5ms soft-start prevent brownout during cold boot; hiccup OCP avoids thermal runaway during firmware crash. |
| Flat-Panel Display Bias | Distributed Telecom Power |
Use Scenario: Generates 5V/3A for LCD panel TCON and LED backlight drivers in 24" monitor. IC Role / Device Role / Timing Role: Secondary regulator deriving clean 5V from 12V system rail; synchronized to system clock to avoid beat frequencies. Use Value: SYNC pin accepts 1MHz external clock to shift switching noise out of video bandwidth; 0.807V reference ensures ±1% output accuracy over temperature. |
Use Scenario: Provides isolated 3.3V/2A for FPGA configuration and management MCU in 48V-powered telecom line card. IC Role / Device Role / Timing Role: Compact, rugged buck stage after front-end isolation; operates reliably across -40°C to +85°C ambient. Use Value: 150°C thermal shutdown and 17V absolute max VIN withstand surge events per IEC 61000-4-5; TSOT-23 package fits dense backplane layouts. |
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 |
|---|---|---|---|
| RT6203BGQW | 4.5V–18V input, 3A, 600kHz, 0.8V ref, but lacks AAM mode and external sync capability. | Higher fSW enables smaller inductors but increases EMI filtering burden; no light-load efficiency optimization. | Select when fixed higher frequency and wider VIN range outweigh need for adaptive light-load control. |
| TPS54332DR | 3.5V–28V input, 3A, 600kHz, 0.8V ref, includes power-good flag and adjustable soft-start, but uses external MOSFETs. | Requires 4 external FETs and gate drivers - larger footprint and higher BOM cost; better thermal scalability for >3A. | Select when system demands >3A headroom, programmable soft-start, or independent thermal management via discrete FETs. |
Compared with RT6203BGQW and TPS54332DR, MP1495SGJ-Z uniquely integrates AAM mode and SYNC capability in an 8-pin TSOT-23, offering the smallest footprint and best light-load efficiency among 3A synchronous buck converters - ideal for portable and space-limited applications where thermal density and standby power matter.
Availability
MP1495SGJ-Z is available at Aetrix Electronics and suitable for notebook I/O power, flat-panel display bias, and distributed telecom power requiring stable component supply, RoHS-compliant packaging, and long-term lifecycle support.
Supply support for MP1495SGJ-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 power management ICs, with over two decades of expertise in DC/DC conversion, motor drivers, and LED lighting controllers.
The MP1495S product line delivers highly integrated, thermally robust synchronous buck converters targeting space-constrained, high-efficiency point-of-load applications in computing, consumer, and industrial equipment.
FAQ
What is the minimum output voltage achievable with MP1495SGJ-Z?
The MP1495SGJ-Z supports output voltages down to 0.8V, set by the internal 0.807V feedback reference and external resistor divider. At VOUT = 0.8V, the FB pin sees exactly the reference voltage, and regulation remains stable across load and temperature - confirmed by electrical characteristics table (VFB = 0.791–0.823V, –40°C to +125°C).
Does MP1495SGJ-Z require an external bootstrap diode?
No. The MP1495SGJ-Z integrates a bootstrap charging circuit that uses the internal high-side switch and VIN to charge the BST capacitor - no external diode is needed. A 0.1μF ceramic capacitor between BST and SW is mandatory, and a 10Ω resistor in series is strongly recommended to damp ringing.
How does the AAM pin affect light-load efficiency?
Applying ~0.5V to the AAM pin forces discontinuous conduction mode (DCM) at light loads, reducing switching losses and lowering quiescent current to 0.5mA. This improves efficiency below ~100mA but increases output voltage ripple; the exact transition point is set by the AAM voltage relative to internal thresholds.
Can MP1495SGJ-Z operate with a 3.3V input supply?
No. The absolute minimum operating input voltage is 4.5V, and the UVLO rising threshold is 3.8V. A 3.3V supply falls below both limits and will prevent startup or cause erratic operation. For 3.3V input applications, consider the MP1471A (3V–17V) or MP2307 (3V–17V) families instead.
What is the maximum allowable output capacitance?
There is no hard upper limit on output capacitance, but the MP1495SGJ-Z's internal compensation is optimized for ceramic capacitors with ESR < 10mΩ and total capacitance between 22μF and 100μF. Excess capacitance (>220μF) may degrade phase margin and cause instability unless external compensation is added.
Is MP1495SGJ-Z pin-compatible with earlier MP1495 variants?
Yes. MP1495SGJ-Z shares identical pinout, package (TSOT-23-8), and electrical specifications with MP1495SGJ and MP1495SG. The "-Z" suffix denotes tape-and-reel packaging only; functional behavior and layout requirements are fully compatible across all MP1495S variants.
How does hiccup-mode over-current protection work during a short circuit?
When output current exceeds 4.5A, the MP1495SGJ-Z triggers cycle-by-cycle current limit. If FB drops below ~400mV (indicating severe overload), it enters hiccup mode: shuts down for ~10ms, then attempts restart. This limits average power dissipation to <1W, preventing thermal damage while allowing automatic recovery once fault clears.
MP1495SGJ-Z 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-Z FAQ
1.How can I place an order for MP1495SGJ-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP1495SGJ-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 MP1495SGJ-Z reliable?
The price and inventory of MP1495SGJ-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP1495SGJ-Z is usually 5 days.
3.What payment methods are accepted for MP1495SGJ-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP1495SGJ-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP1495SGJ-Z?
MP1495SGJ-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP1495SGJ-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 MP1495SGJ-Z?
For technical support, including MP1495SGJ-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP1495SGJ-Z requirements.
6.How does Aetrix verify that MP1495SGJ-Z is sourced from the original manufacturer or authorized distributors?
All MP1495SGJ-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 MP1495SGJ-Z meets industry standards.
7.What is the process for return or replacement of MP1495SGJ-Z?
All MP1495SGJ-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP1495SGJ-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 MP1495SGJ-Z part is unused and in its original packaging.
Return procedure for MP1495SGJ-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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