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Monolithic Power Systems Inc. MP1499GD-P
- Part No.:
- MP1499GD-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 10-VFDFN
- Datasheet:
-
MP1499GD-P.pdf
- Description:
- IC REG BUCK ADJ 5A 10QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,084
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Product details
Overview
MP1499GD-P 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. It operates at a fixed 500kHz switching frequency (syncable from 200kHz–2MHz), supports adjustable output down to 0.807V, and integrates AAM light-load power save mode, thermal shutdown, and hiccup-mode overcurrent protection. It targets compact, high-efficiency point-of-load regulation in digital set-top boxes and flat-panel displays.
For engineers reviewing the MP1499GD-P datasheet, MP1499GD-P pinout, MP1499GD-P application, or MP1499GD-P equivalent, key selection considerations include its QFN10 (2×3mm) package thermal performance, BST bootstrap capacitor requirements, EN/SYNC dual-function pin behavior, and FB voltage accuracy (±1.7% over temperature) for precision output setting.
Technical Context
The MP1499GD-P employs peak-current-mode control with internal compensation, enabling fast transient response and stable loop behavior without external type-II/III networks. Its proprietary switching loss reduction technique and low RDS(ON) MOSFETs enable >90% efficiency at 3.3V/5A with 12V input.
It features a dual-role EN/SYNC pin supporting both enable logic and external clock synchronization, a dedicated BST pin for floating high-side gate drive, and an internal 5V VCC LDO powered from VIN-enabling operation down to 4.5V while maintaining regulated bias for control circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 16V - Supports wide industrial and consumer supply rails including 5V, 12V, and 15V systems without external pre-regulation. |
| Output Current (Peak) | 5A - Enables single-chip 3.3V/5A or 5V/4A PoL conversion for SoC/FPGA core supplies in space-constrained designs. |
| Switching Frequency | Fixed 500kHz (±14%) - Balances EMI, inductor size, and efficiency; externally syncable to 200kHz–2MHz for noise-sensitive or multi-rail coordinated timing. |
| Feedback Reference Voltage | 0.807V ±1.7% (–40°C to +85°C) - Enables precise output setting with standard resistor dividers; tolerance directly impacts output accuracy at all loads. |
| Internal MOSFET RDS(ON) | HS: 70mΩ / LS: 25mΩ - Minimizes conduction loss and thermal rise at full load; enables >92% efficiency at 12V→3.3V/5A on 4-layer PCB. |
| Soft-Start Control | External capacitor on SS pin - Programmable startup ramp prevents inrush current; 11μA internal current source enables predictable tSS = CSS × 73ms/nF. |
| Protection Features | OCP with hiccup mode, thermal shutdown (150°C), UVLO (3.9V rising), and BST UVLO (2.2V) - Ensures robust fault recovery and safe operation under short-circuit or overtemperature conditions. |
Pinout & Package
MP1499GD-P is housed in a thermally enhanced 10-pin QFN package (2mm × 3mm, 0.5mm pitch) with exposed thermal pad. The package supports ≤65°C/W junction-to-ambient thermal resistance on a 4-layer PCB with proper copper pour and vias under the pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 FB | Feedback input | Connects to resistor divider tap; senses output voltage; internal 0.807V reference sets regulation point; sensitive analog node requiring short, direct routing. |
| 2 VCC | Internal LDO output | 5V regulated supply for gate drivers and control logic; requires 0.1–0.22μF ceramic decoupling placed adjacent to pin and GND. |
| 3 EN/SYNC | Enable input / external clock sync | Logic-high (>1.4V) enables operation; external clock (200kHz–2MHz) synchronizes switching edge; internal 1MΩ pull-down allows float-to-disable. |
| 4 BST | Bootstrap supply | Connects to SW via 0.1μF ceramic capacitor; powers high-side driver; internal UVLO (2.2V) disables HS switch if BST drops too low. |
| 5 NC | No connection | Internally unconnected; may be tied to GND for mechanical stability but carries no electrical function. |
| 6,7 GND | Power and signal ground | Common return for output, input, and internal circuits; must connect to large ground plane with multiple vias to minimize noise and thermal resistance. |
| 8 SW | Switch node | Drives external inductor; swings from ~0V to VIN during operation; high di/dt node requiring short, wide traces and separation from FB/VCC. |
| 9 IN | Main input supply | Accepts 4.5V–16V; powers internal MOSFETs and VCC LDO; requires low-ESR input capacitor (e.g., 22μF X5R) placed within 2mm. |
| 10 SS | Soft-start timing | Accepts external capacitor to control output voltage ramp rate; 11μA internal current source defines tSS; prevents inrush into large output capacitors. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power Stage | 70mΩ HS + 25mΩ LS MOSFETs eliminate external FETs and drivers, reducing BOM count and layout complexity for 5A PoL designs. |
| AAM Light-Load Mode | Asynchronous pulse-skipping below ~1A load maintains >85% efficiency at 10mA, critical for always-on subsystems in STBs and monitors. |
| Programmable Soft Start | External SS capacitor enables controlled output ramp (e.g., 10ms with 100nF), preventing overshoot and inductor saturation during cold start. |
| Hiccup-Mode OCP | After current limit triggers and FB falls below 50% of reference, device cycles on/off with ~100ms period-limiting average short-circuit power to <1W. |
| Sync-Capable Oscillator | EN/SYNC pin accepts external clock (200kHz–2MHz) to align switching edges across multiple rails, reducing beat-frequency EMI in multi-converter systems. |
Applications
| Digital Set-Top Box Power | Flat Panel Display Logic Supply |
|---|---|
Use Scenario: Providing 3.3V/4A main logic rail for MPEG decoder, HDMI controller, and memory interface in cable/satellite STBs. IC Role / Device Role / Timing Role: Primary synchronous buck regulator with fixed 500kHz switching; delivers regulated output with <±1% line/load regulation. Use Value: Integrated MOSFETs and internal compensation reduce solution size by 35% vs. controller+FET discrete design; AAM mode cuts standby power by 40%. |
Use Scenario: Generating 5V/3A panel timing controller (TCON) and scaler supply in 24–55" LCD/LED TVs and monitors. IC Role / Device Role / Timing Role: High-current step-down converter synchronized to system clock via EN/SYNC pin to suppress display-related ripple artifacts. Use Value: 5A peak capability handles TCON burst loads; hiccup OCP prevents thermal runaway during panel short events; QFN10 footprint fits tight board margins. |
| Distributed Power System | Industrial Embedded Controller |
Use Scenario: Local 1.2V/3A core supply for ARM Cortex-A series SoCs in modular PLC backplanes or gateway routers. IC Role / Device Role / Timing Role: Secondary buck stage downstream of 12V intermediate bus; configured for 1.2V output using 40.2kΩ/160kΩ T-network feedback. Use Value: 0.807V reference and tight FB tolerance ensure ±1.5% output accuracy across –40°C to +85°C; thermal shutdown protects against enclosure overheating. |
Use Scenario: 5V/2.5A I/O and peripheral rail in DIN-rail mounted HMIs and motion controllers operating in harsh industrial environments. IC Role / Device Role / Timing Role: Robust PoL regulator with UVLO (3.9V) and wide 4.5–16V input range tolerates brownouts and 24V bus transients. Use Value: QFN10 package with exposed pad achieves 65°C/W θJA, enabling full 5A operation at 70°C ambient without forced air; RoHS-compliant and lead-free. |
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, 0.8V reference | Better suited for ultra-compact, high-frequency designs where 3A suffices and sync is unnecessary | Select when board space is critical and load current ≤3A; avoid for 5A or multi-rail sync use cases |
| TPS54560QDGQRQ1 | 6A peak, 100kHz–2.5MHz sync range, external FETs required, automotive-grade (-40°C to +125°C) | Designed for automotive infotainment and ADAS; requires external MOSFETs and compensation network | Choose for AEC-Q100 compliance and higher current headroom; only if added design effort for external FETs is acceptable |
Compared with MP1499GD-P, MP2451DT-LF-Z trades peak current and sync flexibility for smaller size and higher base frequency, while TPS54560QDGQRQ1 adds automotive qualification and current headroom at the cost of increased component count and layout complexity.
Availability
MP1499GD-P is available at Aetrix Electronics and suitable for digital set-top boxes, flat-panel television logic supplies, and distributed power systems requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for MP1499GD-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, with design centers in the US, China, and Taiwan, and global manufacturing partnerships.
The MP1499GD-P belongs to MPS's high-efficiency synchronous buck converter product line, engineered for compact, high-current point-of-load regulation in consumer and industrial electronics where integration, thermal performance, and light-load efficiency are critical.
FAQ
What is the minimum recommended output capacitance for stable operation?
The MP1499GD-P is optimized for ceramic output capacitors ≥47μF with low ESR. For 3.3V/5A operation, a 47μF–100μF X5R/X7R 0805 or 1206 capacitor is recommended. Lower values risk instability or excessive ripple; larger values improve transient response but require longer soft-start time.
Can the MP1499GD-P operate with an input voltage below 4.5V?
No. The absolute minimum operating input voltage is 4.5V per the Recommended Operating Conditions table. Below this, the internal VCC LDO cannot regulate properly, and the high-side MOSFET driver lacks sufficient gate voltage, causing erratic switching or failure to start.
How does the AAM power save mode affect output voltage accuracy at light loads?
In AAM mode, the MP1499GD-P skips switching cycles to maintain regulation, resulting in higher output voltage ripple (typically 10–20mVpp) but no degradation in DC accuracy-the FB reference remains 0.807V, and regulation error stays within datasheet-specified ±1.7%.
Is an external bootstrap diode required for reliable operation?
An external bootstrap diode (e.g., 1N4148) from VCC to BST is recommended only when duty cycle exceeds 65% (e.g., 12V→5V or 12V→3.3V), as it improves BST capacitor charging efficiency and reduces thermal stress on the internal charge pump during high-duty-cycle operation.
What is the maximum allowable RMS current for the input capacitor?
The input capacitor must handle RMS current up to half the maximum load current (e.g., 2.5A for 5A output). At VIN = 2×VOUT, RMS current peaks at ILOAD/2. Ceramic capacitors rated for ≥3A RMS (e.g., two parallel 22μF X5R 0805s) meet this requirement for full 5A operation.
Does the MP1499GD-P support pre-biased output startup?
Yes. When the output is pre-biased, the MP1499GD-P disables both high-side and low-side switches until the SS capacitor voltage exceeds the FB voltage, preventing reverse current flow and ensuring monotonic startup without output droop or overshoot.
How many thermal vias are recommended under the QFN10 exposed pad?
At least six 0.3mm-diameter thermal vias evenly distributed under the exposed pad are recommended. These vias must connect to an internal or bottom-layer solid copper pour (≥1 cm²) to achieve the specified 65°C/W θJA and sustain 5A continuous output at 70°C ambient.
MP1499GD-P 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-P FAQ
1.How can I place an order for MP1499GD-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MP1499GD-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 MP1499GD-P reliable?
The price and inventory of MP1499GD-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP1499GD-P is usually 5 days.
3.What payment methods are accepted for MP1499GD-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP1499GD-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP1499GD-P?
MP1499GD-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP1499GD-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 MP1499GD-P?
For technical support, including MP1499GD-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP1499GD-P requirements.
6.How does Aetrix verify that MP1499GD-P is sourced from the original manufacturer or authorized distributors?
All MP1499GD-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 MP1499GD-P meets industry standards.
7.What is the process for return or replacement of MP1499GD-P?
All MP1499GD-P units undergo pre-shipment inspection (PSI). If there is an issue with MP1499GD-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 MP1499GD-P part is unused and in its original packaging.
Return procedure for MP1499GD-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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