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Monolithic Power Systems Inc. MP1499GD-Z
- Part No.:
- MP1499GD-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 10-VFDFN
- Datasheet:
-
MP1499GD-Z.pdf
- Description:
- IC REG BUCK ADJ 5A 10QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,291
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Product details
Overview
MP1499GD-Z from Monolithic Power Systems is a synchronous step-down DC-DC converter IC with integrated 70mΩ/25mΩ MOSFETs, delivering up to 5A peak output current across a 4.5V–16V input range, fixed 500kHz switching frequency, and adjustable 0.807V reference for precise output regulation - deployed in flat-panel TV power rails and digital set-top box core supplies.
For engineers reviewing the MP1499GD-Z datasheet, MP1499GD-Z pinout, MP1499GD-Z application, or MP1499GD-Z equivalent, key selection criteria include its AAM light-load mode, external clock synchronization (200kHz–2MHz), thermal shutdown (150°C), hiccup-mode OCP, and QFN10 (2×3mm) package with exposed thermal pad for high-power density designs.
Technical Context
The MP1499GD-Z operates in peak-current-mode control with internal error amplifier, 0.807V reference, and proprietary switching loss reduction. Its current-sense architecture enables fast transient response and stable loop compensation without external Type-II/III networks.
It integrates a 5V internal LDO (VCC), bootstrap driver with UVLO (2.2V rising threshold), and EN/SYNC pin supporting both enable logic and external clock synchronization. The device implements cycle-by-cycle overcurrent protection and thermal shutdown with 20°C hysteresis.
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 | 5A peak - delivers full load capability for FPGA I/O, SoC cores, and display logic rails. |
| Switching Frequency | Fixed 500kHz (±14%) - balances efficiency, EMI, and inductor size; syncable from 200kHz to 2MHz. |
| Feedback Reference | 0.807V ±1.7% - enables accurate output setting down to 0.8V with standard resistor dividers. |
| HS/LS RDS(on) | 70mΩ / 25mΩ - minimizes conduction loss at high load, enabling >90% efficiency at 3.3V/5A with 12V input. |
| Thermal Shutdown | 150°C with 20°C hysteresis - protects die during overload or poor PCB thermal design; resumes at ~130°C. |
| OCP Threshold | 7A to 9A (40% duty cycle) - provides robust short-circuit protection with hiccup recovery to limit average fault current. |
Pinout & Package
MP1499GD-Z is housed in a thermally enhanced 10-pin QFN package (2mm × 3mm, 0.4mm pitch) with exposed thermal pad (Pin 6/7 GND). The package supports high-current routing and efficient heat dissipation in compact layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 FB | Feedback Input | Connects to resistor divider tap; senses regulated output voltage; internal 0.807V reference sets VOUT = 0.807V × (1 + R1/R2). |
| 2 VCC | Internal LDO Output | 5V regulated supply for control circuitry; requires 0.1–0.22μF ceramic decoupling close to pin. |
| 3 EN/SYNC | Enable & Clock Sync Input | Logic-high enables operation; external 200kHz–2MHz clock synchronizes switching edge; includes 6.5V Zener clamp. |
| 4 BST | Bootstrap Supply | Drives high-side MOSFET gate; requires 0.1–1μF capacitor between BST and SW pins; optional external diode improves efficiency at high duty cycles. |
| 5 NC | No Connection | Internally unconnected; may be tied to GND for mechanical stability or thermal relief. |
| 6, 7 GND | System Ground | Primary return path for power and signal; must connect to large copper pour with multiple vias for low-impedance thermal and EMI performance. |
| 8 SW | Switch Node | Drives external inductor; swings from near-GND to VIN; requires wide trace and minimal parasitic inductance for low EMI and voltage spike control. |
| 9 IN | Main Input Supply | Accepts 4.5V–16V; powers internal MOSFETs and regulators; requires low-ESR, high-RMS input capacitor placed adjacent to pin. |
| 10 SS | Soft-Start Control | Connects to external capacitor; 11μA internal current source ramps VOUT linearly; prevents inrush current and current-limit tripping during startup. |
Key Features
| Feature | Design Value |
|---|---|
| AAM Light-Load Mode | Enables PFM operation below ~1A load, reducing quiescent current to 1mA and maintaining >85% efficiency at 10mA output. |
| External Clock Synchronization | Accepts 200kHz–2MHz external clock on EN/SYNC pin, eliminating beat frequencies in multi-rail systems and easing EMI compliance. |
| Hiccup-Mode Overcurrent Protection | Enters periodic restart after output short; limits average fault current to <1A, preventing thermal runaway and enabling safe auto-recovery. |
| Proprietary Switching Loss Reduction | Optimizes gate drive timing and dead-time control to reduce turn-on/turn-off losses, improving full-load efficiency by 1–2% vs. standard synchronous buck controllers. |
| Integrated Bootstrap Driver | Self-contained floating gate driver with 2.2V UVLO ensures reliable high-side MOSFET turn-on even under low-duty-cycle conditions. |
Applications
| Flat Panel Television Power Rails | Digital Set-Top Box Core Supplies |
|---|---|
|
Use Scenario: Powers 3.3V and 5V logic rails for video processing ASICs and HDMI interface circuitry in 4K UHD TVs. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering stable, low-noise DC output with fast transient response to handle burst-mode video decoding loads. Use Value: Achieves >92% efficiency at 3.3V/4A with 12V input, minimizing heatsink requirements and enabling ultra-thin chassis designs. |
Use Scenario: Generates 1.2V core voltage for ARM-based media processors and 1.8V I/O supply for DDR memory interfaces in cable/satellite STBs. IC Role / Device Role / Timing Role: High-accuracy adjustable buck converter with soft-start and AAM mode, ensuring clean power-up sequencing and low standby consumption. Use Value: Enables <100μA shutdown current and <1mA light-load quiescent current, meeting stringent Energy Star and EU CoC Tier 2 standby power requirements. |
| Distributed Power Systems | Industrial Embedded Controllers |
|
Use Scenario: Provides point-of-load (POL) conversion from 12V intermediate bus to 5V/3.3V rails in modular server PSUs and telecom line cards. IC Role / Device Role / Timing Role: Compact, high-efficiency POL regulator with sync capability, allowing coordinated switching across multiple rails to suppress conducted EMI peaks. Use Value: QFN10 (2×3mm) footprint and 5A peak rating support dense board layouts while maintaining thermal margin up to +85°C ambient. |
Use Scenario: Supplies 5V microcontroller peripherals and isolated communication interfaces (RS-485, CAN transceivers) in factory automation PLC modules. IC Role / Device Role / Timing Role: Robust buck converter with wide 4.5V–16V input range tolerating brownouts and battery-backed 12V rails; includes hiccup-mode OCP for field reliability. Use Value: Withstands 17V absolute max input and features thermal shutdown with 20°C hysteresis, enabling continuous operation in unventilated enclosures. |
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 |
|---|---|---|---|
| MP2451DT-LF-Z | 3A peak output, 2MHz max switching frequency, no external sync capability, lower RDS(on) (65mΩ/20mΩ), smaller 8-pin SOIC package. | Better suited for space-constrained, lower-current applications where 2MHz operation reduces inductor size but sacrifices some efficiency at high load. | Select when board area is critical and peak load ≤3A; avoid if sync or >4A capability required. |
| RT7297BZSP | 5A peak, 500kHz fixed frequency, no AAM mode, higher quiescent current (2.5mA), different pinout (EN separate from SYNC), same QFN10 package. | Lacks light-load efficiency optimization; requires external compensation network; better for cost-sensitive designs where full-feature integration is not needed. | Choose for legacy compatibility or simplified BOM where AAM and sync are unused; verify layout changes due to pin reassignment. |
Compared with MP1499GD-Z, MP2451DT-LF-Z trades peak current and sync flexibility for smaller size and higher-frequency operation, while RT7297BZSP offers similar current capability but omits AAM and sync-making MP1499GD-Z optimal for high-efficiency, multi-rail, thermally constrained designs requiring programmable startup and EMI control.
Availability
MP1499GD-Z is available at Aetrix Electronics and suitable for flat panel television power rails, digital set-top box core supplies, and distributed power systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MP1499GD-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 analog and power ICs, with design centers in the US, China, and Taiwan, and global manufacturing partnerships.
The MP1499 belongs to MPS's high-efficiency synchronous buck converter product line, engineered for compact, high-current DC-DC conversion in consumer, industrial, and communications equipment where thermal density and light-load efficiency are critical.
FAQ
What is the minimum recommended soft-start capacitor value for MP1499GD-Z?
The minimum soft-start capacitor is 4.7nF when output capacitance exceeds 330μF. This prevents current-limit triggering during startup. For typical 100–220μF output banks, 22nF (as shown in the datasheet schematic) provides ~10ms ramp time, balancing inrush control and startup speed.
Does MP1499GD-Z require an external bootstrap diode?
An external bootstrap diode (e.g., IN4148) is recommended only when VOUT ≥3.3V and duty cycle >65% (i.e., VOUT/VIN >0.65), such as 5V output from 7.5V input. It improves BST capacitor charging efficiency and reduces switching losses under high-duty conditions.
How does the AAM power-save mode affect output voltage accuracy at light load?
AAM mode maintains output voltage regulation within ±2% of nominal VOUT down to 10mA load. The error amplifier remains active, and the 0.807V reference is unchanged; only switching frequency is reduced to minimize quiescent loss without sacrificing regulation integrity.
Can MP1499GD-Z operate with input voltage below 4.5V?
No - the absolute minimum operating input is 4.5V per datasheet specifications. Below this, UVLO disables operation. The 3.7V–4.1V UVLO rising threshold applies only to the internal VCC regulator; the IN pin itself must remain ≥4.5V for functional operation.
What is the maximum allowable RMS current for the input capacitor in MP1499GD-Z designs?
The input capacitor must support ≥2.5A RMS current when delivering 5A output at VIN = 2×VOUT (worst case). For 12V→3.3V conversion, RMS current is ~1.8A; two parallel 22μF X7R ceramics (each rated ≥2A RMS) meet this requirement with margin.
Is the NC pin (Pin 5) required to be grounded in PCB layout?
Pin 5 is internally unconnected and may be left floating, tied to GND, or used for thermal relief. Grounding it improves thermal conduction to the PCB ground plane but is not electrically necessary; no performance impact occurs either way.
How does the hiccup-mode overcurrent protection behave during sustained short-circuit events?
Upon short circuit, MP1499GD-Z enters hiccup mode: it attempts restart every ~20ms, limiting average output current to <1A. Junction temperature stabilizes below 120°C under typical PCB thermal conditions, preventing damage and enabling automatic recovery once fault clears.
MP1499GD-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 10-VFDFN
- 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):
- 0.807V
- Voltage - Output (Max):
- 13V
- Current - Output:
- 5A
- Frequency - Switching:
- 500kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-QFN (3x2)
MP1499GD-Z FAQ
1.How can I place an order for MP1499GD-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP1499GD-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 MP1499GD-Z reliable?
The price and inventory of MP1499GD-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP1499GD-Z is usually 5 days.
3.What payment methods are accepted for MP1499GD-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP1499GD-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP1499GD-Z?
MP1499GD-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP1499GD-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 MP1499GD-Z?
For technical support, including MP1499GD-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP1499GD-Z requirements.
6.How does Aetrix verify that MP1499GD-Z is sourced from the original manufacturer or authorized distributors?
All MP1499GD-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 MP1499GD-Z meets industry standards.
7.What is the process for return or replacement of MP1499GD-Z?
All MP1499GD-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP1499GD-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 MP1499GD-Z part is unused and in its original packaging.
Return procedure for MP1499GD-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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