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Monolithic Power Systems Inc. MP8792GLE-Z
- Part No.:
- MP8792GLE-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 21-PowerVFQFN
- Datasheet:
-
MP8792GLE-Z.pdf
- Description:
- IC REG BUCK ADJ 12A 21QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,086
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Product details
Overview
MP8792GLE-Z from Monolithic Power Systems is a fully integrated 16V input, 12A synchronous step-down converter with adjustable current limit (16A max), configurable switching frequency (600/800/1000 kHz), and differential remote-sense voltage tracking. It employs adaptive constant-on-time (COT) control for ultra-fast transient response and operates across -40°C to +125°C junction temperature with 0.6V–5.5V adjustable output. Used in FPGA core power rails requiring tight regulation and fast load steps.
For engineers reviewing the MP8792GLE-Z datasheet, MP8792GLE-Z pinout, MP8792GLE-Z application, or MP8792GLE-Z equivalent, key selection criteria include its non-latch OCP/OVP/UVP/OTP protection suite, programmable soft-start (1ms min), pre-biased start-up capability, and compatibility with zero-ESR MLCC output capacitors - all critical for high-reliability embedded and communications power systems.
Technical Context
The MP8792 uses adaptive COT control with internal ramp compensation, enabling stable operation across full VIN (4–16V) and VOUT (0.6–5.5V) ranges without external loop compensation. Its valley-current sensing via CS pin provides cycle-by-cycle over-current protection with configurable trip point (1.2V threshold) and hiccup-mode recovery.
Differential remote sensing (FB/VSNS−) enables precise regulation at point-of-load, while TRK/REF supports analog voltage tracking or external reference injection with 0.3–1.4V input range. The device integrates dual MOSFETs with RDS(ON) of 13.3 mΩ (HS) and 3.8 mΩ (LS), and features an internal 3V LDO (VCC) with ±0.5% load regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V–16V DC (internal VCC bias) or 2.7V–16V (external 3.3V bias): enables direct integration into 5V/12V intermediate bus systems. |
| Output Current | 12A continuous: supports high-power FPGA, ASIC, and SoC core rails without external current sharing. |
| Switching Frequency | 600/800/1000 kHz (pin-selectable): allows optimization of size vs. efficiency - e.g., 1000 kHz enables <10 µH inductors. |
| Feedback Reference | 600 mV ±0.5% (0–70°C), ±1% (-40–125°C): ensures accurate output setting across industrial temperature range. |
| Current Limit Accuracy | 1.2 V ±4.2% threshold at CS pin: enables precise 12–16A output current limiting with ±5% resistor tolerance. |
| Thermal Shutdown | 160°C with 30°C hysteresis: prevents latch-up during sustained overload while allowing safe auto-recovery at ~130°C. |
| Power Good Delay | 0.9 ms typical from FB ≥92.5% VREF to PGOOD high: provides deterministic system power sequencing timing. |
Pinout & Package
MP8792GLE-Z is housed in a thermally enhanced QFN-21 package (3mm × 4mm, 0.5mm pitch) with exposed thermal pad (Pin 19 VCC and Pins 11–18 PGND provide primary thermal conduction paths).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 BST | Bootstrap supply | Provides floating gate drive for HS-FET; requires ceramic capacitor between BST and SW to sustain high-side conduction. |
| 3 CS | Current sense input | Accepts mirrored inductor current; sets OCP threshold via RCS resistor to AGND (GCS = 20 µA/A). |
| 4 MODE | Operation mode select | Resistor-programmable: selects CCM/pulse-skip and fSW (600/800/1000 kHz) per Table 1 in datasheet Rev. 1.0. |
| 5 TRK/REF | Tracking/reference input | Enables output voltage tracking or external reference; controls soft-start time via capacitor to VSNS− (CSS ≈ 36·tSS nF). |
| 7 FB | Differential feedback input | High-impedance input for resistor divider; used with VSNS− for remote sensing to reject PCB IR drop. |
| 8 EN | Enable control | Active-high logic input; supports automatic start-up via pull-up to VIN and pre-biased load handling. |
| 9 PGOOD | Open-drain status output | Indicates VOUT in regulation (±7.5% of VREF); clamped low during input failure regardless of external pull-up. |
| 10,21 VIN | Main power input | Supplies both power stage and internal circuitry; requires multi-capacitor decoupling (CIN1–CIN3) near package. |
| 19 VCC | Internal LDO output | 3.0 V ±0.5% regulated supply for control circuits; requires ≥1 µF X7R/X5R ceramic capacitor close to pin. |
| 20 SW | Switch node | Drives external inductor; swings from ~0 V to VIN; demands low-inductance layout and wide copper pour. |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive COT control | Eliminates need for external compensation components and guarantees stability with zero-ESR MLCCs across full operating range. |
| Differential remote sensing | Compensates for up to 100 mV PCB trace IR drop between regulator and load, maintaining ±0.5% output accuracy at point-of-load. |
| Programmable soft-start | Adjustable from 1 ms minimum (internal timer) to >10 ms via TRK/REF capacitor - prevents inrush current in multi-rail systems. |
| Pre-biased start-up | Monotonically ramps output without reverse current flow when VOUT is pre-charged, protecting downstream loads and capacitors. |
| Output discharge on disable | Integrated 80 Ω discharge FET actively pulls SW to PGND when EN is low, discharging VOUT within milliseconds. |
Applications
| FPGA Core Power | High-Definition Display Bias |
|---|---|
|
Use Scenario: Supplying 1.0V/12A core rail to Xilinx Kintex UltraScale+ FPGA under dynamic 0–10A load transients. IC Role / Device Role / Timing Role: Primary synchronous buck regulator with differential remote sense and adaptive COT for sub-10 µs transient recovery. Use Value: Maintains <±1% output deviation during 8A/µs load steps, eliminating need for large bulk capacitance at point-of-load. |
Use Scenario: Generating 3.3V/8A bias for LCD panel source drivers in medical-grade diagnostic monitors. IC Role / Device Role / Timing Role: High-accuracy, low-noise DC-DC converter with PGOOD sequencing and thermal foldback for safety-critical display subsystems. Use Value: Delivers 0.5% reference stability over -40°C to +85°C ambient, ensuring consistent brightness calibration across operating conditions. |
| Optical Line Card Power | Industrial PLC I/O Module |
|
Use Scenario: Providing 1.8V/10A supply to 100G coherent optical transceiver DSPs in telecom line cards. IC Role / Device Role / Timing Role: Fast-transient, low-ripple power stage with programmable frequency (800 kHz) to avoid EMI bands near 100 MHz clock harmonics. Use Value: Achieves <15 mVpp output ripple at full load with 22 µF total MLCC output capacitance, reducing EMI filter complexity. |
Use Scenario: Delivering 5.0V/6A isolated auxiliary power to digital I/O modules in factory automation controllers. IC Role / Device Role / Timing Role: Robust, fault-tolerant buck converter with non-latch OCP/UVP/OVP/OTP and PGOOD-driven system watchdog reset. Use Value: Survives 2× rated short-circuit events for >10 s without damage and recovers autonomously after fault clearance. |
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 |
|---|---|---|---|
| RTQ2132BGQW | 17V/12A, fixed 800kHz fSW, no TRK/REF pin, lower RDS(ON) (11/3.2 mΩ), but lacks differential remote sense. | Requires external remote sense amplifier; less suitable for long-trace FPGA power where IR drop exceeds 50 mV. | Preferred when board space is constrained and tracking/remote sense not required - smaller 3mm × 3mm QFN-16 package. |
| TPS546B24A | 18V/20A, PMBus interface, 0.5% ref, but requires external compensation and has higher quiescent current (1.2 mA vs. 0.85 mA). | Supports digital telemetry and margining; overkill for fixed-output, cost-sensitive industrial designs. | Chosen only when system-level power management (rail sequencing, telemetry, fault logging) is mandatory. |
Compared with RTQ2132BGQW and TPS546B24A, MP8792GLE-Z delivers superior analog flexibility (TRK/REF, differential sensing, pulse-skip/CCM selection) and simpler BOM (no external compensation), making it optimal for analog-intensive, thermally demanding FPGA and display power applications.
Availability
MP8792GLE-Z is available at Aetrix Electronics and suitable for FPGA core power, high-definition display bias, optical line card power, and industrial PLC I/O module designs requiring stable component supply, extended temperature support, and rapid design-in.
Supply support for MP8792GLE-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 innovation in DC-DC conversion, motor drivers, and LED lighting solutions.
The MP8792 belongs to MPS's high-current monolithic buck converter product line, designed specifically for high-density, high-efficiency point-of-load regulation in FPGA, ASIC, and display subsystems where thermal performance and transient response are critical.
FAQ
What is the minimum recommended output capacitance for stable operation?
The MP8792 is stable with zero-ESR MLCCs; minimum recommended output capacitance is 22 µF (X7R, 1206 or larger). This value ensures sufficient energy storage for 12A load steps and maintains <15 mVpp ripple at 800 kHz switching frequency. Lower values may cause instability under heavy transient loads.
Can MP8792GLE-Z operate with an input voltage below 4V?
Yes - with external 3.3V bias applied to VCC, the MP8792 supports VIN down to 2.7V. In this configuration, VCC powers the control circuitry independently, enabling reliable startup and regulation in battery-powered or low-voltage intermediate bus applications.
How does the TRK/REF pin function during pre-biased start-up?
During pre-biased start-up, TRK/REF must rise above the existing FB voltage before switching begins. The IC disables both MOSFETs until TRK/REF exceeds FB; if BST voltage falls below 2.3V, the LS-FET pulses briefly to charge BST via VCC, preventing reverse current and ensuring monotonic ramp.
What is the maximum allowable resistance for the MODE resistor?
The maximum MODE resistor value is 243 kΩ (±20%) to GND for 600 kHz pulse-skip mode. Higher resistance causes undefined behavior - the MODE pin has internal weak pull-down; exceeding 291.6 kΩ risks misconfiguration or oscillation between modes.
Does MP8792GLE-Z support forced continuous conduction mode (FCCM) at light loads?
Yes - FCCM is enabled by connecting MODE to 30.1 kΩ, 60.4 kΩ, or GND (for 1000 kHz) with appropriate resistors per Table 1. FCCM eliminates low-frequency ripple and improves noise immunity in sensitive analog circuits, though at slight efficiency penalty below 20% load.
What happens to PGOOD when VIN drops below UVLO threshold?
When VIN falls below 2.1 V (rising threshold), the MP8792 disables switching and pulls PGOOD low within 1 ms. Crucially, PGOOD remains clamped to ~0.7 V even if externally pulled up - providing unambiguous power-fail indication independent of external bias voltage.
Is the CS pin intended for current monitoring or only over-current protection?
The CS pin is primarily for cycle-by-cycle over-current protection via RCS resistor. While VCS is proportional to inductor current (20 µA/A), its bandwidth and offset (±3 mV error amp) make it unsuitable for precision current measurement; dedicated current-sense amplifiers are recommended for monitoring.
MP8792GLE-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:
- 12A
- 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)
MP8792GLE-Z FAQ
1.How can I place an order for MP8792GLE-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP8792GLE-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 MP8792GLE-Z reliable?
The price and inventory of MP8792GLE-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP8792GLE-Z is usually 5 days.
3.What payment methods are accepted for MP8792GLE-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP8792GLE-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP8792GLE-Z?
MP8792GLE-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP8792GLE-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 MP8792GLE-Z?
For technical support, including MP8792GLE-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP8792GLE-Z requirements.
6.How does Aetrix verify that MP8792GLE-Z is sourced from the original manufacturer or authorized distributors?
All MP8792GLE-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 MP8792GLE-Z meets industry standards.
7.What is the process for return or replacement of MP8792GLE-Z?
All MP8792GLE-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP8792GLE-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 MP8792GLE-Z part is unused and in its original packaging.
Return procedure for MP8792GLE-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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