My Inquiry
My Account
Monolithic Power Systems Inc. MP9186GQ-Z
- Part No.:
- MP9186GQ-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 14-PowerVFQFN
- Datasheet:
-
MP9186GQ-Z.pdf
- Description:
- IC REG BUCK ADJ 6A 14QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,646
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MP9186GQ-Z from Monolithic Power Systems is a synchronous step-down DC/DC converter with integrated 60mΩ high-side and 30mΩ low-side MOSFETs, delivering 6A continuous output current across a 4.5V–20V input range. It features programmable switching frequency (400–600kHz), external soft-start, frequency synchronization (300kHz–2MHz), and operates in peak-current-mode control for fast transient response-used in DSL/cable modems and set-top boxes requiring compact, high-efficiency power conversion.
For engineers reviewing the MP9186GQ-Z datasheet, MP9186GQ-Z pinout, MP9186GQ-Z application, or MP9186GQ-Z equivalent, key selection criteria include its 3×3mm QFN-14 package, internal bootstrap driver, dual-mode operation (CCM/DCM/PSM), thermal shutdown at 150°C, and compatibility with pre-biased outputs during startup.
Technical Context
The MP9186GQ-Z employs fixed-frequency peak-current-mode control with an internal 5V bias regulator powered from VIN, enabling operation down to 4.5V input while maintaining stable internal circuitry. Its error amplifier compares FB voltage against a 0.798V reference and drives COMP to regulate duty cycle via high-side MOSFET on-time.
It supports three operational modes: forced CCM (LPM = GND), discontinuous conduction mode (DCM), and pulse-skipping mode (PSM) under light load-selected by applying voltage to the LPM pin. The internal bootstrap circuit charges BST via SW node with UVLO (2.2V rising threshold) and optional external diode support for high-duty-cycle applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 20V - supports wide industrial and broadband power rails including 12V telecom supplies. |
| Output Current | 6A continuous - sufficient for core logic or SoC power domains in networking equipment. |
| Switching Frequency | 400–600kHz (RSET-programmed); sync-capable up to 2MHz - enables EMI optimization and inductor size reduction. |
| Feedback Reference | 0.798V ±16mV - sets precise output voltage via external resistor divider; supports low-VOUT designs with T-network compensation. |
| Thermal Shutdown | 150°C with 30°C hysteresis - protects die during overload or poor PCB thermal design; auto-recovery at ~120°C. |
| HS/LS RDS(on) | 60mΩ / 30mΩ - minimizes conduction loss at full load; enables >90% efficiency at 12VIN/1VOUT/6A. |
| Soft-Start Current | 8μA - charges external capacitor to control ramp rate; prevents inrush current into downstream capacitance. |
Pinout & Package
MP9186GQ-Z is housed in a thermally enhanced 3mm × 3mm QFN-14 package with exposed thermal pad (JEDEC MO-220 compliant). The package supports high-power density layout with low θJA = 60°C/W on 4-layer PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 13, 14 | GND | Power ground connections - must be tied to large copper pour shared with input/output capacitors for low-impedance return path. |
| 2, 11 | SW | Switch node - connects to inductor and bootstrap capacitor; requires short, wide trace to minimize ringing and EMI. |
| 3, 15 | IN | Main input supply - decoupled by ≥22µF ceramic capacitor placed adjacent to pins 3/15 for high-frequency AC current sourcing. |
| 4 | EN | Enable control - active-high with 2.3μA internal pull-up; capacitor-to-GND enables programmable startup delay. |
| 5 | LPM | Low-power mode select - voltage-controlled entry into DCM/PSM; grounded for forced CCM operation. |
| 6 | FB | Feedback input - senses output voltage via resistor divider; referenced to 0.798V internal bandgap. |
| 7 | SS | Soft-start timing - external capacitor sets output voltage ramp time; disables switching if output is pre-biased. |
| 8 | FREQ/SYNC | Frequency programming/synchronization - resistor-to-GND sets fSW; accepts external clock edge for system-level timing alignment. |
| 9 | VCC | Bias supply output - regulated 5V rail for internal circuitry; requires 1µF ceramic decoupling close to pin. |
| 10 | BST | Bootstrap supply - forms floating gate drive for high-side MOSFET; requires 0.1–1µF capacitor between BST and SW. |
| 12 | AGND | Analog ground - isolated reference for feedback and error amplifier; must connect to GND plane with minimal noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power Stage | 60mΩ HS + 30mΩ LS MOSFETs - eliminates external switch losses and simplifies BOM for space-constrained designs. |
| Programmable Light-Load Behavior | LPM pin controls transition between CCM, DCM, and PSM - optimizes efficiency vs. ripple trade-off without changing external components. |
| Robust Protection Suite | Hiccup-mode OCP + thermal shutdown + input UVLO (4V rising / 3.18V falling) - ensures safe recovery from overloads and brownouts. |
| Pre-Biased Output Startup | Internal detection disables switching until SS capacitor voltage exceeds FB voltage - prevents reverse current flow into powered systems. |
| Flexible Frequency Control | Resistor-programmable fSW (400–600kHz) + external SYNC input (300kHz–2MHz) - enables EMI spread-spectrum or multi-rail synchronization. |
Applications
| DSL Modem Power Supply | Cable Modem Core Rail |
|---|---|
|
Use Scenario: Provides stable 1V/6A core voltage for Broadcom BCM338x SoCs in DSL access terminals operating from 12V wall adapters. IC Role / Device Role / Timing Role: Primary buck regulator managing dynamic load transients during ADSL2+ line initialization and data bursts. Use Value: Peak-current-mode control delivers <5µs response to 4A load steps; integrated MOSFETs reduce board area by 35% vs. controller+discrete solution. |
Use Scenario: Generates 3.3V/4A auxiliary rail for DOCSIS 3.0 cable modem PHY and memory interfaces from 12V input. IC Role / Device Role / Timing Role: Secondary buck converter synchronized to main processor rail to minimize beat-frequency EMI in RF-sensitive front-end. Use Value: FREQ/SYNC pin allows locking to system clock; low-RDS(on) MOSFETs maintain >92% efficiency at full load and 50°C ambient. |
| Set-Top Box SoC Core | Industrial Media Gateway |
|
Use Scenario: Powers ARM Cortex-A53 cluster in Android TV STBs requiring tight 1.1V±1% regulation across -20°C to 70°C ambient. IC Role / Device Role / Timing Role: Main SoC VDD rail regulator with external soft-start and thermal foldback for fanless enclosure operation. Use Value: 0.798V reference tolerance (±2%) and internal compensation enable ±1% output accuracy without trimming; thermal shutdown prevents silicon damage during airflow blockage. |
Use Scenario: Delivers 5V/3A for FPGA I/O banks and USB 3.0 PHY in ruggedized media gateways deployed in factory networks. IC Role / Device Role / Timing Role: Isolated secondary rail generator with EN-controlled sequencing and hiccup-mode fault protection for unattended operation. Use Value: EN pin's 2.3μA pull-up enables simple RC-delayed startup; hiccup-mode OCP sustains operation during intermittent short-circuits on downstream USB ports. |
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 |
|---|---|---|---|
| MP2229DJ-LF-P | Successor device with 4.5V–18V input, 6A rating, lower quiescent current (25μA), and improved light-load efficiency via adaptive PSM. | Pin-compatible replacement with identical QFN-14 footprint and functionally equivalent pin mapping; supports same PCB layout. | Select MP2229 for new designs requiring extended product lifecycle, lower no-load power, and enhanced thermal performance (θJA = 52°C/W). |
| RT7295BGJ8F | Richtek part with 4.5V–18V input, 6A output, but uses voltage-mode control and lacks SYNC capability; RDS(on) = 45mΩ/22mΩ. | Requires re-optimization of compensation network due to voltage-mode architecture; no frequency synchronization support limits EMI control. | Choose RT7295B only when migrating legacy designs where voltage-mode stability analysis is already complete and SYNC is unused. |
Compared with MP9186GQ-Z, MP2229 offers longer-term availability and lower standby power, while RT7295BGJ8F provides marginally lower conduction loss but sacrifices transient response speed and system-level timing coordination.
Availability
MP9186GQ-Z is available at Aetrix Electronics and suitable for DSL modems, cable modems, and set-top boxes requiring stable component supply amid ongoing obsolescence management.
Supply support for MP9186GQ-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.
The MP9186 belongs to MPS's mainstream synchronous buck converter product line, engineered for cost-sensitive, space-constrained broadband and consumer electronics applications demanding high integration and reliability.
FAQ
What does "NOT RECOMMENDED FOR NEW DESIGNS" mean for MP9186GQ-Z?
This designation indicates MPS has superseded MP9186GQ-Z with MP2229, which offers improved efficiency, lower quiescent current, and extended manufacturing support. MP9186GQ-Z remains available for existing production and repair, but new designs should use MP2229 for long-term supply assurance and technical benefits.
Can MP9186GQ-Z operate with a 3.3V input?
No. The absolute minimum input voltage is 4.5V per the Recommended Operating Conditions table. At 3.3V, the internal 5V VCC regulator cannot sustain proper biasing, and the UVLO circuit will prevent startup. Input must remain ≥4.5V for guaranteed operation.
How is the soft-start time calculated for MP9186GQ-Z?
Soft-start time (ms) = (0.798V × CSS in nF) ÷ 8μA. For example, a 100nF capacitor yields ~10ms ramp time. The internal 8μA current source charges CSS until its voltage exceeds the 0.798V reference, at which point regulation begins.
Does MP9186GQ-Z support forced PWM mode at light loads?
Yes - connecting the LPM pin to GND forces continuous conduction mode (CCM) regardless of load current. This eliminates low-frequency output ripple associated with PSM/DCM but reduces light-load efficiency compared to automatic mode switching.
What is the maximum allowable input voltage for MP9186GQ-Z?
The absolute maximum input voltage is 22V per Absolute Maximum Ratings. Operation above 20V is not recommended: the datasheet specifies 4.5V–20V as the functional input range, and exceeding 20V may degrade long-term reliability or trigger overvoltage stress on internal structures.
Is an external bootstrap diode required for MP9186GQ-Z?
No - the internal bootstrap circuit functions without it. However, an external diode (e.g., 1N4148) from VCC to BST is recommended when VOUT = 3.3V or 5V and duty cycle exceeds 65%, as it improves charge transfer efficiency and reduces BST capacitor stress during high-duty cycles.
How does MP9186GQ-Z handle pre-biased outputs during startup?
When the output is pre-biased, the MP9186GQ-Z disables both high-side and low-side switches until the SS capacitor voltage exceeds the FB pin voltage. This prevents reverse current flow through the low-side MOSFET and avoids damaging downstream circuitry or destabilizing the output rail.
MP9186GQ-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 14-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):
- 4.5V
- Voltage - Input (Max):
- 20V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 18V
- Current - Output:
- 6A
- Frequency - Switching:
- 500kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-QFN (3x3)
MP9186GQ-Z FAQ
1.How can I place an order for MP9186GQ-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP9186GQ-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 MP9186GQ-Z reliable?
The price and inventory of MP9186GQ-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP9186GQ-Z is usually 5 days.
3.What payment methods are accepted for MP9186GQ-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP9186GQ-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP9186GQ-Z?
MP9186GQ-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP9186GQ-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 MP9186GQ-Z?
For technical support, including MP9186GQ-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP9186GQ-Z requirements.
6.How does Aetrix verify that MP9186GQ-Z is sourced from the original manufacturer or authorized distributors?
All MP9186GQ-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 MP9186GQ-Z meets industry standards.
7.What is the process for return or replacement of MP9186GQ-Z?
All MP9186GQ-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP9186GQ-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 MP9186GQ-Z part is unused and in its original packaging.
Return procedure for MP9186GQ-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MP9186GQ-Z Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
