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Monolithic Power Systems Inc. MP8761GLE-P
- Part No.:
- MP8761GLE-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 16-PowerVFQFN
- Datasheet:
-
MP8761GLE-P.pdf
- Description:
- IC REG BUCK ADJ 8A 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,528
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Product details
Overview
MP8761GLE-P from Monolithic Power Systems is a fully-integrated, synchronous step-down DC/DC converter delivering 8A output current across 4.5V–18V input with adaptive Constant-On-Time (COT) control, 1% reference voltage accuracy (0°C to +125°C), and integrated 28mΩ/16mΩ MOSFETs - deployed in flat-panel TV power rails and small-cell base station intermediate bus conversion.
For engineers reviewing the MP8761GLE-P datasheet, MP8761GLE-P pinout, MP8761GLE-P application, or MP8761GLE-P equivalent, key selection criteria include programmable 200kHz–1MHz switching frequency, non-latch OCP/OVP/thermal shutdown, pre-bias startup capability, and QFN-16 (3mm×4mm) thermal performance with θJA = 46°C/W.
Technical Context
The MP8761GLE-P implements adaptive COT control without an external oscillator, using the FREQ pin's resistor-to-IN connection for line feed-forward stabilization - maintaining near-constant switching frequency across input voltage variation. Its internal 4.8V VCC LDO powers gate drivers and control logic, while external 5V bias disables the LDO to extend VIN down to 2.5V.
Operation supports both PWM (CCM) and skip-mode (DCM) with automatic transition at critical load current; valley-current OCP (8–12A) and negative-current limiting (−4A to −1A) provide robust fault recovery via hiccup mode, and the open-drain PG signal asserts after 2.5ms once FB reaches 91% of VREF.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 8A continuous - enables single-chip supply for SoC core rails or FPGA I/O banks without parallel converters. |
| Input Voltage Range | 4.5V–18V (internal bias) or 2.5V–18V (external 5V bias) - supports wide-range industrial and telecom inputs including 5V, 12V, and 15V rails. |
| Reference Voltage | 611mV ±9mV over −40°C to +125°C - ensures <1% output regulation error across full junction temperature range. |
| Switching Frequency | 200kHz–1MHz (resistor-programmable) - balances efficiency vs. size: 500kHz typical for 1µH inductor + 22µF ceramic output filter. |
| MOSFET RDS(ON) | High-side 28mΩ / Low-side 16mΩ at TJ=25°C - reduces conduction loss to <1.2W at 8A, enabling >92% peak efficiency at 12VIN/1.2VOUT. |
| Protection Features | Non-latch OCP (valley & negative), OVP (117–123% VREF), thermal shutdown (150°C), and UVLO (adjustable via EN resistor network) - eliminates need for external fault management circuitry. |
| Soft-Start | Programmable via external capacitor (20µA charging current) - prevents inrush current into large output capacitors during cold start or pre-biased conditions. |
Pinout & Package
MP8761GLE-P is housed in a thermally enhanced 16-pin QFN package (3mm × 4mm, 0.5mm pitch) with exposed thermal pad (PGND-connected) and wettable flanks for automated optical inspection. Pin 1 is marked by a dot; pin numbering follows standard QFN top-view convention with EN at corner 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (Pin 1) | Enable control input | Digital ON/OFF control; internal hysteresis (250mV); resistor divider on EN sets custom UVLO threshold (e.g., 9V startup). |
| FREQ (Pin 2) | Frequency programming node | Resistor from FREQ to IN sets ON-time and stabilizes fSW against VIN variation; supports 200kHz–1MHz range. |
| FB (Pin 3) | Feedback sensing input | Monitors output via resistor divider; sets VOUT = 0.611V × (1 + R1/R2); also enables OVP detection at 117–123% VREF. |
| SS (Pin 4) | Soft-start timing node | 20µA current source charges external capacitor; controls output ramp rate and prevents current-limit tripping during startup. |
| AGND (Pin 5) | Analog ground reference | Separate low-noise ground for feedback, reference, and control circuits - must be star-connected to PGND under IC body. |
| PG (Pin 6) | Power-good open-drain output | Asserts high after 2.5ms when VFB ≥ 91% VREF; pulls low if VFB drops below 80% or exceeds 120% VREF. |
| VCC (Pin 7) | Internal LDO output | 4.8V ±5% regulated supply for gate drivers; decoupled with ≥1µF X7R/X5R ceramic; disabled when external 5V applied. |
| BST (Pin 8) | Bootstrap supply node | Connects to SW via 0.1µF ceramic capacitor; generates floating gate drive voltage for high-side MOSFET. |
| SW (Pins 9,14) | Power switch node | Drives external inductor; swings from GND to VIN; requires wide copper pour and multiple vias for thermal and current handling. |
| PGND (Pins 10,11,12,13,15,16) | Power ground return | Low-impedance return path for high di/dt currents; connects directly to thermal pad; must be solid plane under IC footprint. |
| IN (Pin 13) | Main input supply | Accepts 4.5V–18V (or 2.5V–18V with external VCC); requires ≥10µF ceramic input capacitor placed adjacent to IN and PGND pins. |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive COT Control | Eliminates external compensation network; achieves <10µs load transient response with minimal output capacitance (e.g., 2×22µF). |
| Integrated Power Stage | 28mΩ HS-FET + 16mΩ LS-FET co-packaged in single die - reduces BOM count, layout area, and parasitic inductance vs. controller+discrete solution. |
| Pre-Bias Startup | Monotonic output ramp even when VOUT is pre-charged; disables switching until SS voltage exceeds FB voltage - prevents reverse current flow. |
| Programmable Switching Frequency | Resistor-based fSW setting (200kHz–1MHz) allows optimization for EMI compliance (e.g., 400kHz for CISPR-22 Class B) or size reduction (800kHz+). |
| Non-Latch Fault Protection | OCP, OVP, and thermal shutdown auto-recover after fault clears - avoids system latch-up during momentary overload or thermal excursion. |
Applications
| Flat-Panel Television Power | Small-Cell Base Station |
|---|---|
|
Use Scenario: Supplies 1.2V/8A core voltage to video processing SoC in 4K UHD display systems with tight thermal envelope. IC Role / Device Role / Timing Role: Primary intermediate bus converter stepping 12V down to SoC core rail; operates in CCM with 500kHz switching for optimal efficiency/noise trade-off. Use Value: Integrated MOSFETs and 1% VREF enable ±12mV output tolerance at full load, meeting SoC voltage margin requirements without post-regulation. |
Use Scenario: Powers RF transceiver ASIC in LTE/5G pico-cell unit requiring clean, fast-transient 3.3V/6A supply from 12V backplane. IC Role / Device Role / Timing Role: Point-of-load regulator with PG signal synchronized to FPGA configuration sequence; uses skip-mode for <100µA quiescent current during sleep states. Use Value: Adaptive COT delivers <15mV undershoot on 4A step load, eliminating need for additional LDO post-regulator and reducing total solution size by 35%. |
| Set-Top Box Main Rail | Distributed Power System |
|
Use Scenario: Generates 1.1V/8A CPU core supply in cable/satellite STB with constrained PCB area and no forced airflow. IC Role / Device Role / Timing Role: High-density buck converter operating at 800kHz to shrink inductor to 0805-size (1.0µH); thermal pad soldered to 2oz internal ground plane. Use Value: θJA = 46°C/W and 93% peak efficiency at 12VIN/1.1VOUT limit junction rise to <35°C at 70°C ambient - avoids thermal throttling during sustained video decode. |
Use Scenario: Provides isolated 5V/5A auxiliary rail in modular server PSU where board space and reliability are critical. IC Role / Device Role / Timing Role: Secondary-side synchronous buck in hybrid topology; leverages PG signal for upstream DC-DC sequencing and fault reporting. Use Value: Non-latch OCP and thermal shutdown ensure graceful degradation during fan failure or connector misinsertion - meets IEC 62368-1 fault containment requirements. |
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 |
|---|---|---|---|
| MP8770GQ-P | Successor device: 10A rating, 2.5V–18V input, improved light-load efficiency, same 3mm×4mm QFN-16 package. | Recommended for new designs; supports higher current density and lower quiescent current (450µA vs. 860µA) in always-on subsystems. | Select MP8770GQ-P when designing new platforms requiring >8A capability or extended battery life in portable infrastructure. |
| TPS54821RHLR | Texas Instruments part: 8A, 4.5V–20V input, current-mode control, external compensation, 16-pin QFN (4mm×4mm). | Larger footprint and design complexity due to external loop compensation; lacks pre-bias startup and adaptive COT. | Choose TPS54821RHLR only if existing TI ecosystem mandates compatibility or if precise current-sense gain tuning is required. |
Compared with MP8761GLE-P, MP8770GQ-P offers higher current headroom and lower IQ for next-gen designs, while TPS54821RHLR trades integration for control flexibility - making MP8761GLE-P optimal for cost-sensitive, space-constrained applications needing proven reliability and minimal external components.
Availability
MP8761GLE-P is available at Aetrix Electronics and suitable for flat-panel television power supplies, small-cell base station PoL conversion, and set-top box main rails requiring stable component supply across multi-year production cycles.
Supply support for MP8761GLE-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 MP8761 belongs to MPS's high-current synchronous buck converter product line, engineered for compact, efficient point-of-load regulation in consumer, telecom, and industrial equipment where thermal density and transient response are critical.
FAQ
What is the minimum recommended input voltage for MP8761GLE-P with internal bias?
The MP8761GLE-P requires a minimum 4.5V input when using its internal 4.8V VCC LDO. Below this, the LDO cannot regulate, causing improper gate drive and potential malfunction. External 5V bias enables operation down to 2.5V input, but VCC pin must be bypassed with ≥1µF ceramic capacitor in that configuration.
Can MP8761GLE-P safely start into a pre-biased output?
Yes - MP8761GLE-P features monotonic pre-bias startup. When VOUT is pre-charged, the IC holds both HS- and LS-FETs off until the SS capacitor voltage exceeds the FB voltage, preventing reverse current and ensuring controlled ramp-up without output collapse or oscillation.
How does the FREQ pin set switching frequency, and what resistor value yields 500kHz?
The FREQ pin uses a resistor (RFREQ) from FREQ to IN to program ON-time per τON = 0.4 × RFREQ(kΩ) × VIN(V) ns. For 500kHz at VIN = 12V, RFREQ ≈ 453kΩ (per datasheet Equation 1), yielding τON ≈ 250ns and stable fSW across input variation due to feed-forward compensation.
What thermal derating applies above 70°C ambient?
With θJA = 46°C/W on a 4-layer PCB, maximum allowable power dissipation drops linearly: at 70°C ambient, PDMAX = (150°C − 70°C)/46°C/W ≈ 1.74W. At 8A output, this corresponds to ~217mV effective RDS(ON) - well within the 28mΩ/16mΩ spec, confirming safe operation up to 125°C junction with proper layout.
Is MP8761GLE-P RoHS-compliant and halogen-free?
Yes - MP8761GLE-P is lead-free, halogen-free, and fully compliant with EU RoHS Directive 2011/65/EU. MPS confirms green status on its official website under Quality Assurance, with material declarations available upon request for IPC-1752A compliance reporting.
Does the PG pin require an external pull-up resistor, and what value is typical?
Yes - PG is open-drain and requires an external pull-up to a voltage ≤5.5V (e.g., VCC or 3.3V). A 100kΩ resistor is typical: it limits sink current to <40µA during assertion while ensuring fast rise time (<1µs) given PG's 4mA sink capability and low leakage (<100nA).
Why is MP8761GLE-P marked "Not Recommended for New Designs" in the datasheet?
The datasheet notes this because MP8770GQ-P - a pin-compatible 10A successor with improved efficiency, lower IQ, and enhanced protection - has superseded MP8761GLE-P for new projects. MP8761GLE-P remains fully supported for legacy production and second-sourcing, with no announced EOL date.
MP8761GLE-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 16-PowerVFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 18V
- Voltage - Output (Min/Fixed):
- 0.611V
- Voltage - Output (Max):
- 13V
- Current - Output:
- 8A
- Frequency - Switching:
- 200kHz ~ 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QFN (3x4)
MP8761GLE-P FAQ
1.How can I place an order for MP8761GLE-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MP8761GLE-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 MP8761GLE-P reliable?
The price and inventory of MP8761GLE-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP8761GLE-P is usually 5 days.
3.What payment methods are accepted for MP8761GLE-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP8761GLE-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP8761GLE-P?
MP8761GLE-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP8761GLE-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 MP8761GLE-P?
For technical support, including MP8761GLE-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP8761GLE-P requirements.
6.How does Aetrix verify that MP8761GLE-P is sourced from the original manufacturer or authorized distributors?
All MP8761GLE-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 MP8761GLE-P meets industry standards.
7.What is the process for return or replacement of MP8761GLE-P?
All MP8761GLE-P units undergo pre-shipment inspection (PSI). If there is an issue with MP8761GLE-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 MP8761GLE-P part is unused and in its original packaging.
Return procedure for MP8761GLE-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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