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Monolithic Power Systems Inc. MP8795GLE-Z
- Part No.:
- MP8795GLE-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 21-PowerVFQFN
- Datasheet:
-
MP8795GLE-Z.pdf
- Description:
- IC REG BUCK ADJ 15A 21QFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,405
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Product details
Overview
MP8795GLE-Z from Monolithic Power Systems is a fully integrated, high-frequency synchronous step-down converter delivering up to 15A output current with adjustable current limit and programmable switching frequency (600/800/1000 kHz). It employs constant-on-time (COT) control for fast transient response and operates across 4V–16V input with 0.6V–5.5V adjustable output, used in solid-state drives and flat-panel display power rails.
For engineers reviewing the MP8795GLE-Z datasheet, MP8795GLE-Z pinout, MP8795GLE-Z application, or MP8795GLE-Z equivalent, key selection criteria include its QFN-21 (3mm×4mm) package, differential remote sensing capability, non-latch OCP with programmable threshold via CS pin, PGOOD active-clamp behavior during input failure, and soft-start time programmability via dual SS capacitors.
Technical Context
The MP8795GLE-Z implements an internally compensated constant-on-time (COT) control architecture with adaptive ramp compensation, enabling stable operation with low-ESR MLCC output capacitors across full input (4–16V) and output (0.6–5.5V) ranges. Its valley-current sensing via CS pin enables cycle-by-cycle over-current protection with programmable trip point (1.15–1.25V threshold).
It supports dual light-load modes-pulse skip for peak efficiency at low load and forced CCM for low ripple-and integrates a 3V internal LDO (VCC), open-drain PGOOD with 0.8ms delay, and output discharge FET (RON ≈ 80Ω) activated on EN deassertion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V–16V DC with internal bias; extends to 2.7V with external 3.3V VCC bias - enables compatibility with 5V/12V intermediate bus and wide-input industrial rails. |
| Output Current | Up to 15A continuous - supports high-power SoC and FPGA core rail requirements in SSDs and displays. |
| Switching Frequency | Selectable 600/800/1000 kHz via MODE resistor - allows optimization of size (higher fSW → smaller L/C) vs. efficiency (lower fSW → lower switching loss). |
| Feedback Reference | 600 mV ±1% (–40°C to +125°C) - enables precise output regulation down to 0.6V for modern low-voltage processors. |
| Current Limit Accuracy | ±4.2% (1.15–1.25V threshold) - ensures repeatable over-current trip across temperature and process variation. |
| Thermal Shutdown | 160°C with 30°C hysteresis - provides robust protection against sustained overload or poor heatsinking without latch-off. |
| PGOOD Thresholds | High: 92.5% VREF; Low: 80% VREF - delivers reliable power sequencing signal with defined window for system monitoring. |
Pinout & Package
MP8795GLE-Z is housed in a thermally enhanced QFN-21 package (3mm × 4mm, 0.5mm pitch) with exposed thermal pad (Pin 11–18 = PGND) for efficient heat dissipation in high-current applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 BST | Bootstrap supply node | Provides floating gate drive voltage for high-side MOSFET; requires ceramic capacitor between BST and SW. |
| 3 CS | Current sense input | Accepts mirrored valley current signal; sets OCP threshold via external RCS resistor (GCS = 10 µA/A). |
| 4 MODE | Operation mode select | Configures light-load mode (pulse skip/forced CCM) and switching frequency via resistor to AGND or VCC. |
| 5 SS | Soft-start timing input | Charged by internal 42 µA source; total capacitance (CSS1 + CSS2) sets ramp time (min 1 ms, scalable to >2 ms). |
| 6 RGND | Remote sense negative reference | Connects directly to load ground for differential sensing; short to AGND if remote sense unused. |
| 7 FB | Feedback voltage input | Monitors output via resistor divider; enables 0.6V–5.5V regulation with 600 mV reference and <3 mV offset. |
| 8 EN | Enable control input | Logic-level enable (1.2 V threshold, 200 mV hysteresis); must not be left floating. |
| 9 PGOOD | Power-good open-drain output | Indicates regulated output (92.5–116% VREF); clamped low (~0.7 V) during VIN failure regardless of pull-up. |
| 10,21 VIN | Main power input | Supplies internal MOSFETs and control circuitry; requires local ceramic decoupling. |
| 19 VCC | Internal 3V LDO output | Powers gate drivers and analog circuits; requires ≥1 µF X7R/X5R ceramic capacitor placed adjacent to pin. |
| 20 SW | Switch node | Drives external inductor; swings from PGND to VIN; requires low-inductance layout and wide copper pour. |
Key Features
| Feature | Design Value |
|---|---|
| Differential remote sensing | Separate RGND and FB pins reduce load regulation error to <±10 mV under 15A load step, critical for SSD controller voltage stability. |
| Programmable current limit | Adjustable OCP threshold (1.15–1.25V) via single RCS resistor enables precise current limiting without external current-sense amplifier. |
| Output voltage discharge | Integrated 80Ω discharge FET activates on EN deassertion, safely discharging output to <20% VREF within milliseconds. |
| Pre-bias start-up support | Monotonic start into pre-biased outputs prevents reverse current flow and avoids system reset glitches during hot-plug events. |
| Adaptive RAMP compensation | Eliminates need for external compensation network; ensures stability with standard MLCC output capacitors across all VIN/VOUT combinations. |
Applications
| Solid-State Drive (SSD) Core Rail | Flat-Panel Display Logic Supply |
|---|---|
Use Scenario: Powers NVMe controller and DRAM buffer in enterprise SSD modules requiring tight voltage tolerance and fast load transient response. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering 1.1V/15A with differential remote sensing to compensate for PCB IR drop. Use Value: Maintains <±1% output regulation under 0–15A 10A/µs load steps due to COT control and low RDS(ON) MOSFETs (HS: 10 mΩ, LS: 3 mΩ). | Use Scenario: Supplies 3.3V logic rail for TCON and timing controller in 4K UHD LCD panels with strict ripple and sequencing requirements. IC Role / Device Role / Timing Role: High-efficiency step-down converter with PGOOD signaling for system power sequencing and fault reporting. Use Value: Achieves >92% efficiency at 3.3V/10A with 800 kHz switching, reducing thermal load in space-constrained display enclosures. |
| Distributed Power System Intermediate Bus | Set-Top Box SoC Core Supply |
Use Scenario: Converts 12V intermediate bus to 5V/12A for downstream POL converters in multi-rail consumer electronics power architectures. IC Role / Device Role / Timing Role: High-current intermediate bus converter with programmable frequency to avoid AM band interference and simplify EMI filtering. Use Value: Enables compact design using 600 kHz mode with 2.2 µH inductor and 2×220 µF MLCC output, minimizing board area. | Use Scenario: Delivers 1.0V/12A core voltage to ARM-based media SoC in streaming set-top boxes with dynamic DVFS voltage scaling. IC Role / Device Role / Timing Role: Adjustable-output buck regulator supporting VID-like voltage programming via FB divider and soft-start timing control. Use Value: Programmable soft-start (1–5 ms) prevents inrush current during boot, protecting upstream 12V supply and enabling clean system initialization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| RTQ2132B-QT | Higher max input (28V), lower max output current (12A), fixed 600kHz fSW, no MODE pin for frequency selection. | Lacks programmable frequency and pulse-skip mode; better suited for higher-input industrial rails than consumer 12V systems. | Choose when input exceeds 16V or when fixed-frequency simplicity outweighs MP8795's flexibility. |
| TPS546D24RSAR | Supports PMBus interface, 3.5V–18V input, 60A capability (multi-phase), but larger 5mm×6mm package and higher BOM cost. | Targeted at server/data center applications requiring digital telemetry and phase interleaving-not cost-sensitive consumer designs. | Choose only if digital configuration, telemetry, or >15A output is required; otherwise over-specified. |
Compared with RTQ2132B-QT and TPS546D24RSAR, MP8795GLE-Z offers optimal balance of 15A output, 3mm×4mm footprint, selectable frequency, and light-load efficiency tuning-making it ideal for space-constrained, high-volume consumer power rails where analog control suffices.
Availability
MP8795GLE-Z is available at Aetrix Electronics and suitable for solid-state drives, flat-panel televisions and monitors, set-top boxes, and distributed power systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MP8795GLE-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 MP8795 belongs to MPS's high-current monolithic buck converter product line, engineered for compact, high-efficiency DC/DC conversion in consumer, computing, and display applications where thermal density and layout simplicity are critical.
FAQ
What is the minimum recommended soft-start capacitance for MP8795GLE-Z?
The MP8795GLE-Z requires two separate soft-start capacitors: CSS1 (SS to RGND) and CSS2 (SS to AGND), each ≥1 nF. This dual-capacitor structure stabilizes the internal reference during startup and ensures monotonic output ramp. Using only one capacitor or values below 1 nF risks unstable soft-start behavior or premature exit from SS mode before regulation is achieved.
How does the MP8795GLE-Z handle pre-biased outputs during start-up?
The MP8795GLE-Z supports monotonic pre-bias start-up: when FB voltage is already above zero at EN assertion, the IC disables both HS- and LS-FETs until the SS voltage exceeds the sensed FB level. During this hold-off, narrow pulses activate the LS-FET to charge BST via VCC, maintaining BST >2.3V without significantly discharging the pre-biased output.
Can MP8795GLE-Z operate with only external 3.3V VCC bias and no VIN applied?
No. The MP8795GLE-Z requires VIN to be present for normal operation-even with external 3.3V applied to VCC. The VCC pin powers internal analog circuitry and gate drivers, but the high-side and low-side MOSFETs, current sensing, and PWM logic depend on VIN. If VIN = 0V, the device enters shutdown and PGOOD is clamped low regardless of VCC or EN state.
What is the purpose of the RGND pin, and how should it be routed?
R-GND is the dedicated return path for the remote sense feedback loop and serves as the reference for the error amplifier. It must be connected directly to the load-side ground point-separate from power ground-to reject PCB IR drop. Routing RGND with low-impedance, Kelvin-connected traces (avoiding vias or shared pours) ensures <±5 mV load regulation error under full 15A load.
Does MP8795GLE-Z support output discharge when disabled via EN?
Yes. When EN is pulled low, the MP8795GLE-Z activates an internal discharge FET between SW and PGND (RON ≈ 80–150 Ω) to rapidly collapse the output voltage. Discharge continues until FB falls below 20% of VREF (≈120 mV), at which point the FET turns off. This feature eliminates need for external discharge circuitry in systems requiring controlled power-down.
How is over-voltage protection (OVP) cleared after a latch-off event?
OVP in MP8795GLE-Z is latch-off: once FB exceeds 116% VREF, the HS-FET latches off and PGOOD remains low until either EN or VIN is cycled (fully removed and reapplied). Simply toggling EN while VIN remains present will not clear the fault. Recovery requires full power recycle to reset internal protection latches and reinitialize soft-start.
What is the maximum allowable voltage on the SW pin during startup or fault conditions?
The SW pin has an absolute maximum rating of –5V to +25V for ≤25 ns pulses (repetition ≤1 MHz) when VIN = 16V. Under steady-state operation, SW swings between PGND and VIN. Exceeding these limits-even briefly-risks permanent damage to the integrated power MOSFETs or driver circuitry, especially during inductive kickback or bootstrap capacitor failure.
MP8795GLE-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 21-PowerVFQFN
- 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):
- 4V
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 15A
- Frequency - Switching:
- 600kHz, 800kHz, 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 21-QFN (3x4)
MP8795GLE-Z FAQ
1.How can I place an order for MP8795GLE-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP8795GLE-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 MP8795GLE-Z reliable?
The price and inventory of MP8795GLE-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP8795GLE-Z is usually 5 days.
3.What payment methods are accepted for MP8795GLE-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP8795GLE-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP8795GLE-Z?
MP8795GLE-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP8795GLE-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 MP8795GLE-Z?
For technical support, including MP8795GLE-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP8795GLE-Z requirements.
6.How does Aetrix verify that MP8795GLE-Z is sourced from the original manufacturer or authorized distributors?
All MP8795GLE-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 MP8795GLE-Z meets industry standards.
7.What is the process for return or replacement of MP8795GLE-Z?
All MP8795GLE-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP8795GLE-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 MP8795GLE-Z part is unused and in its original packaging.
Return procedure for MP8795GLE-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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