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Monolithic Power Systems Inc. MP8869SGL-Z
- Part No.:
- MP8869SGL-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 14-VFDFN Exposed Pad
- Datasheet:
-
MP8869SGL-Z.pdf
- Description:
- IC REG BUCK PROG 12A 14QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,309
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Product details
Overview
MP8869SGL-Z from Monolithic Power Systems is a 18V, 12A synchronous step-down converter with integrated I²C telemetry, constant-on-time (COT) control, and programmable output voltage (0.6V–1.108V in 4mV steps). It delivers 12A continuous/15A peak current across 2.85V–18V input, supports PFM/PWM mode selection, and features open-drain power good (PG) indication-used in SSD power rails requiring dynamic voltage scaling and real-time current monitoring.
For engineers reviewing the MP8869SGL-Z datasheet, MP8869SGL-Z pinout, MP8869SGL-Z application, or MP8869SGL-Z equivalent, this device enables precise digital control of output voltage, slew rate, frequency, current limit, and protection modes-critical for high-density server VRMs, display power supplies, and distributed DC-DC systems demanding telemetry-driven thermal and load management.
Technical Context
The MP8869SGL-Z implements constant-on-time (COT) control with internal ramp compensation to ensure fast transient response and stable loop behavior without external compensation. Its dual-MOSFET synchronous architecture integrates a 15mΩ high-side and 4.5mΩ low-side switch, enabling >95% efficiency at 12A with VIN=12V/VOUT=1V.
I²C interface supports four selectable addresses (61H–67H), real-time ±5% output voltage and current monitoring, programmable OCP (14A), hiccup/latch-off fault recovery, and 30μs PG deglitching-enabling closed-loop telemetry in host-managed power systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.85V to 18V - supports wide-input industrial and computing rails including 3.3V, 5V, 12V, and 15V intermediate bus architectures. |
| Output Current | 12A continuous / 15A peak - sustains full load under worst-case thermal conditions with QFN-14 package and proper PCB copper area. |
| Reference Accuracy | ±1% at 25°C, ±1.5% over –40°C to +125°C - ensures tight output regulation for sensitive logic and memory supplies. |
| I²C Programmability | 0.6V–1.108V VREF in 4mV steps, slew rate, frequency (400–1250kHz), OCP, PFM/PWM mode - enables firmware-controlled adaptive power delivery. |
| Protection Features | OVP (121–129% VREF), hiccup/latch-off OCP, thermal shutdown (160°C), UVLO (2.45–2.85V) - provides robust fault containment without external circuitry. |
| Power Good (PG) | Open-drain output with 0.81–0.89VOUT UV falling threshold and 1.01–1.09VOUT OV falling threshold - delivers precise, glitch-filtered status signaling to host controllers. |
| Package | QFN-14 (3mm × 4mm) with exposed thermal pad - optimized for high-current density layouts and thermal dissipation up to 2.5W at TA=25°C. |
Pinout & Package
MP8869SGL-Z is housed in a thermally enhanced QFN-14 (3mm × 4mm) package with exposed thermal pad. Pin functions are validated per MPS MP8869S Rev. 1.05 datasheet (p.17).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST | Bootstrap supply | Connects external capacitor between BST and SW to bias high-side gate driver; critical for HS-FET turn-on above VIN. |
| SW | Switch node | High-current switching output; requires wide PCB trace and minimized loop area to reduce EMI and conduction loss. |
| SCL | I²C clock input | HS/LS-mode compatible (0–3.4MHz); supports standard and fast-mode I²C for telemetry and configuration updates. |
| SDA | I²C data bidirectional | Open-drain I/O with internal pull-up capability; enables multi-drop telemetry bus with SDAH/SCLH level-shifting support. |
| EN | Enable control | 1.2V typical rising threshold with 110mV hysteresis; internal 1.5MΩ pull-down allows direct connection to VIN for auto-start. |
| A0 | I²C address select | Voltage divider input setting one of four I²C addresses (61H–67H); thresholds defined at 0.24–0.77×VCC for robust logic-level detection. |
| PG | Power good indicator | Open-drain output asserting high when VOUT is within ±5% window; 4mA sink capability drives FPGA/CPU reset or PMIC sequencer inputs. |
| PGND | Power ground reference | Primary return path for output current; must be connected to thermal pad and isolated from AGND until single-point star ground. |
| VIN | Main input supply | 2.85–18V rail input; requires local 10μF+ ceramic decoupling adjacent to pin to suppress high-frequency switching noise. |
| VOUT | Output voltage sense | Direct connection to load positive terminal; used for remote sensing to compensate PCB IR drop in high-current applications. |
| FB | Feedback input | Connects to resistor divider tap; 10–50nA input bias enables high-impedance dividers minimizing quiescent current error. |
| SS | Soft-start timing | Capacitor-to-ground sets ramp time; 5–9μA charging current enables precise control of inrush current during startup. |
| VCC | Internal LDO output | 3.5V regulated supply powering internal logic; requires 0.47μF ceramic decoupling to maintain stability under dynamic load. |
| AGND | Analog ground reference | Signal ground for FB, SS, A0, SCL/SDA; must be tied to PGND at single point near IC to avoid noise coupling into feedback path. |
Key Features
| Feature | Design Value |
|---|---|
| Digital telemetry via I²C | Real-time ±5% VOUT and IOUT readback, plus programmable OCP, frequency, and slew rate-enables host-based power health monitoring and adaptive margining. |
| Constant-on-time (COT) control | Eliminates need for external compensation components while delivering <10μs load transient response-ideal for CPU/GPU core rails with rapid current changes. |
| Four I²C addresses | Selectable via A0 pin voltage thresholds (61H/63H/65H/67H)-supports up to four MP8869SGL-Z devices on same bus for multi-rail power subsystems. |
| Hiccup/latch-off OCP | Configurable fault response: hiccup mode for self-recovery after overload, or latch-off for safety-critical shutdown-reduces system-level fault propagation risk. |
| External soft-start | Capacitor-programmable startup ramp (ISS = 5–9μA) - prevents inrush current damage to input capacitors and upstream converters in cascaded power trees. |
Applications
| Solid-State Drive (SSD) Power Rail | Flat-Panel Display Logic Supply |
|---|---|
|
Use Scenario: Powers NAND flash controller and DRAM cache in enterprise NVMe SSDs with dynamic voltage scaling based on workload. IC Role / Device Role / Timing Role: Primary buck regulator delivering 1.2V/1.8V/3.3V at up to 12A with I²C telemetry feeding thermal throttling algorithms. Use Value: Enables firmware-controlled V/f scaling and real-time current monitoring to extend NAND endurance and prevent thermal runaway during sustained writes. |
Use Scenario: Supplies TCON (timing controller) and source/gate drivers in 4K LCD/LED TVs with tight ripple and fast transient requirements. IC Role / Device Role / Timing Role: High-efficiency, low-noise step-down converter with COT control ensuring <100mV output deviation during backlight dimming transients. Use Value: Maintains display image integrity by suppressing ripple-induced flicker and enabling seamless brightness transitions without visible artifacts. |
| Distributed Server Power System | Network Equipment PoL Converter |
|
Use Scenario: Provides 0.9V/1.1V core power to ASICs/FPGAs in modular server blades with centralized PMBus-compatible supervision. IC Role / Device Role / Timing Role: Digitally programmable POL converter interfacing with baseboard management controller (BMC) via I²C for rail sequencing and fault logging. Use Value: Reduces BOM count by eliminating discrete telemetry ADCs and simplifies compliance testing through standardized register-based monitoring. |
Use Scenario: Delivers 1.2V/1.8V/2.5V to packet processors and SerDes in 10G/25G Ethernet switches with strict EMI limits. IC Role / Device Role / Timing Role: Synchronous buck with 400–1250kHz adjustable switching frequency to avoid noise-sensitive bands (e.g., 2.4GHz Wi-Fi, PCIe REFCLK). Use Value: Achieves >90% efficiency at 8A while meeting CISPR-32 Class B conducted emissions without additional shielding or filtering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS546D24A (Texas Instruments) | 60A peak, 16V max input, PMBus 1.3 interface, integrated MOSFETs with 0.65mΩ RDS(on), no COT control (voltage-mode with D-CAP3) | Targets higher-current AI accelerators; lacks COT's ultra-fast transient response but offers richer PMBus telemetry and multiphase support | Select for >20A systems requiring PMBus ecosystem compatibility and multiphase scalability; not drop-in due to pinout and control architecture differences |
| ISL8206M (Renesas) | 10A continuous, 16V max input, I²C interface, fixed 500kHz/750kHz/1MHz options, no programmable slew rate or VREF fine-step adjustment | Used in space-constrained telecom modules; supports fewer I²C addresses and lacks real-time current readback accuracy (±10% vs. ±5%) | Select where cost sensitivity outweighs telemetry granularity; verify thermal design with lower 10A rating and fixed frequency options |
Compared with TPS546D24A and ISL8206M, MP8869SGL-Z uniquely balances 12A capability, COT transient performance, and granular I²C programmability (4mV VREF steps, slew rate control) in a compact QFN-14 footprint-making it optimal for mid-power, telemetry-driven embedded systems where layout area and dynamic regulation precision are prioritized over ultra-high current or PMBus infrastructure.
Availability
MP8869SGL-Z is available at Aetrix Electronics and suitable for solid-state drive power rails, flat-panel display logic supplies, and network equipment point-of-load applications requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for MP8869SGL-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 a focus on energy-efficient DC-DC conversion, motor drivers, and LED lighting solutions.
The MP8869SGL-Z belongs to MPS's high-current, digitally programmable buck converter product line, designed specifically for telemetry-enabled power delivery in space-constrained, thermally demanding computing and display applications.
FAQ
What is the minimum recommended output capacitance for MP8869SGL-Z?
The datasheet specifies ≥220μF total output capacitance using low-ESR ceramic or polymer capacitors. This value ensures stable COT operation, limits output voltage deviation to <1% under 12A step load, and maintains PG assertion during transient events. Layout must minimize ESL by placing capacitors close to VOUT and PGND pins.
Can MP8869SGL-Z operate without an external bootstrap capacitor?
No. The BST pin requires a 0.1μF ceramic capacitor connected between BST and SW to generate the floating gate drive voltage for the high-side MOSFET. Omitting this capacitor prevents HS-FET turn-on, causing immediate functional failure and potential damage due to uncontrolled LS-FET conduction.
How does the I²C address selection work on A0 pin?
A0 accepts a resistor divider from VCC to GND, with four voltage thresholds (0.24VCC, 0.28–0.49VCC, 0.53–0.72VCC, 0.77VCC) mapping to I²C addresses 61H, 63H, 65H, and 67H respectively. Threshold tolerances accommodate 1.8V–3.6V VCC, enabling robust multi-device addressing without external logic.
What is the maximum achievable switching frequency and under what conditions?
Maximum frequency is 1.25MHz, achieved when VOUT ≥ 1.2V and VIN = 5V. At VOUT = 0.6V and VIN = 12V, minimum on-time limitation reduces frequency to 500kHz. Frequency is set via bits D[5:4] in register 02 and remains stable across input voltage variations due to COT architecture.
Does MP8869SGL-Z support forced PWM mode at light loads?
Yes. Forced PWM mode is I²C-configurable and maintains continuous conduction (CCM) regardless of load, eliminating low-frequency PFM switching noise. This is essential for noise-sensitive analog circuits and ensures predictable EMI profiles during standby or idle states.
What thermal derating applies above 25°C ambient?
With θJA = 48°C/W, junction temperature rises ~576°C at 12A full load-exceeding 150°C max. Derating is required: at TA = 60°C, max continuous current drops to ~8.5A. Use thermal vias under the exposed pad and ≥2 oz copper on inner layers to achieve practical 12A operation at 60°C ambient.
Is the power good (PG) signal active-high or active-low?
PG is open-drain and active-low by default: it pulls low when VOUT is within regulation (0.85–1.05×VREF), and floats high (requiring external pull-up) when out-of-regulation. This matches standard reset supervisor inputs and enables wired-OR fault signaling across multiple rails.
MP8869SGL-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 14-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Programmable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.85V
- Voltage - Input (Max):
- 18V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 12A
- Frequency - Switching:
- 500kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-QFN (3x4)
MP8869SGL-Z FAQ
1.How can I place an order for MP8869SGL-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP8869SGL-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 MP8869SGL-Z reliable?
The price and inventory of MP8869SGL-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP8869SGL-Z is usually 5 days.
3.What payment methods are accepted for MP8869SGL-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP8869SGL-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP8869SGL-Z?
MP8869SGL-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP8869SGL-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 MP8869SGL-Z?
For technical support, including MP8869SGL-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP8869SGL-Z requirements.
6.How does Aetrix verify that MP8869SGL-Z is sourced from the original manufacturer or authorized distributors?
All MP8869SGL-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 MP8869SGL-Z meets industry standards.
7.What is the process for return or replacement of MP8869SGL-Z?
All MP8869SGL-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP8869SGL-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 MP8869SGL-Z part is unused and in its original packaging.
Return procedure for MP8869SGL-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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