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Monolithic Power Systems Inc. MP8868GLE-Z
- Part No.:
- MP8868GLE-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 14-PowerVFQFN
- Datasheet:
-
MP8868GLE-Z.pdf
- Description:
- IC REG BUCK PROG 10A 14QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,457
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Product details
Overview
MP8868GLE-Z from Monolithic Power Systems is a high-efficiency, synchronous step-down DC/DC converter delivering up to 10A output current with I²C programmability. It operates from 4.5V–17V input, supports 0.6V–1.87V output voltage in 10mV steps via I²C, and integrates dual MOSFETs in a QFN-14 (3×4mm) package. Used for powering SoCs, FPGAs, and ASICs requiring dynamic voltage scaling and precise power sequencing.
For engineers reviewing the MP8868GLE-Z datasheet, MP8868GLE-Z pinout, MP8868GLE-Z application, or MP8868GLE-Z equivalent, key selection criteria include I²C-configurable VOUT slew rate, hiccup-mode OCP response, open-drain PG timing behavior, thermal shutdown threshold (160°C), and bootstrap capacitor charging validation under transient load conditions.
Technical Context
The MP8868 employs current-mode control with internal 5V LDO (VCC) and a dedicated bootstrap driver for the high-side MOSFET. Its I²C interface configures reference voltage, switching frequency (200kHz–2MHz), soft-start time, PSM/Fs mode, and OCP/OVP status reporting - all without external resistors or jumpers.
It supports three operating modes: CCM (default), AAM for light-load efficiency, and DCM at ultra-light loads. The PG pin responds only to undervoltage (70%–90% VREF window) with 100μs deglitching; OVP uses linear discharge via 35Ω internal resistor but does not assert PG.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 17V - supports wide industrial and computing rail inputs including 5V, 12V, and 15V systems. |
| Max Output Current | 10A continuous - enables single-chip supply for high-performance processors and FPGA core rails. |
| Output Voltage Range | 0.6V to 1.87V in 10mV steps - matches DDR, ARM, and RISC-V core voltage requirements with fine-grained I²C tuning. |
| Switching Frequency | 200kHz to 2MHz - allows optimization of inductor size vs. EMI; supports external clock sync for system-level timing alignment. |
| Reference Accuracy | ±1% over –40°C to +85°C - ensures stable output regulation across temperature without calibration. |
| Thermal Shutdown | 160°C with 20°C hysteresis - protects against sustained overload while enabling recovery after cooling. |
| Power Good Window | 70% to 90% of VREF - provides clean UV detection with 100μs deglitching; no OV indication on PG pin. |
| HS/LS RDS(on) | 26mΩ / 11mΩ - minimizes conduction loss at full load, supporting >92% peak efficiency at 12V→1V/10A. |
Pinout & Package
MP8868GLE-Z is housed in a thermally enhanced QFN-14 package (3mm × 4mm, 0.5mm pitch) with exposed thermal pad. Pin 14 (AGND) and Pin 8 (PGND) must be connected to system ground via multiple vias; BST requires 0.1μF ceramic between SW and BST; SS sets soft-start time via external capacitor.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 BST | Bootstrap Supply | Drives high-side gate; requires 0.1μF ceramic capacitor to SW to sustain floating bias during HS conduction. |
| 2 SW | Switch Node | High-current path to inductor; must use wide PCB trace and low-inductance layout to minimize ringing and EMI. |
| 3 SCL | I²C Clock Input | Accepts 0–3.4MHz clock; internal pull-up not provided - external pull-up required per I²C bus spec. |
| 4 SDA | I²C Data Bidirectional | Open-drain I/O; supports standard/fast-mode I²C; requires external pull-up resistor (typically 2.2kΩ). |
| 5 EN/SYNC | Enable & Sync Input | Internal 5.4μA pull-up enables auto-start; accepts 200kHz–2MHz external clock for frequency synchronization. |
| 6 A0 | I²C Address Select | Ground = 0x20; float/VCC = 0x21 - enables dual-device addressing on same I²C bus without conflict. |
| 7 PG | Power Good Output | Open-drain indicator; asserts high only when VFB is within 70–90% of VREF; 100μs deglitch applied. |
| 8 PGND | Power Ground | Main return path for high-current loops; must connect directly to ground plane with ≥4 thermal vias. |
| 9 VIN | Main Input Supply | 4.5V–17V input; requires ≥22μF ceramic decoupling close to pin; trace width ≥1.5mm recommended. |
| 10 VOUT | Output Sense | Direct connection to load positive terminal; used in I²C mode instead of FB for EA non-inverting input. |
| 11 FB | Feedback Input | Used only in non-I²C (resistor-divider) mode; connects to resistor divider tap for analog VOUT setting. |
| 12 SS | Soft-Start Control | 10μA internal current source charges external capacitor; SS time = (CSS × VREF) / 10μA. |
| 13 VCC | Internal LDO Output | 5V regulated output; requires 0.47μF ceramic decoupling; powers internal logic and gate drivers. |
| 14 AGND | Analog Ground | Signal reference for FB, SS, and I²C; must tie to PGND at single point near IC to avoid noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| I²C Programmable VOUT | 0.6V–1.87V in 10mV steps with slew rate control - enables dynamic voltage scaling for power-aware SoC operation. |
| Hiccup-Mode Overcurrent Protection | Triggers after valley-current limit violation and UV lockout; reduces average short-circuit current to <1A for thermal safety. |
| Three-Mode Operation (CCM/AAM/DCM) | Automatically transitions between modes based on load; AAM extends light-load efficiency without external control. |
| Open-Drain Power Good with UV Detection | PG asserts only for undervoltage (70–90% VREF); 100μs deglitch prevents false triggers during transients. |
| Integrated Bootstrap Charging Circuit | Self-regulated BST voltage (≤5V) with internal UVLO (2.2V, 150mV hysteresis) - eliminates need for external charge pump. |
| Pre-Biased Output Startup | Supports monotonic ramp-up into pre-biased rails - critical for hot-swap and multi-rail sequencing applications. |
Applications
| SoC Core Power | FPGA I/O Bank Supply |
|---|---|
|
Use Scenario: Powers ARM Cortex-A series or RISC-V application processors requiring dynamic VDD scaling during DVFS. IC Role / Device Role / Timing Role: Primary core regulator with I²C-controlled output voltage and soft-start timing synchronized to processor boot sequence. Use Value: Enables real-time voltage adjustment matching CPU workload, reducing idle power by up to 35% versus fixed-output converters. |
Use Scenario: Supplies configurable I/O banks on Xilinx Artix/Kintex or Intel Cyclone/Arria FPGAs with varying VCCIO requirements. IC Role / Device Role / Timing Role: Independent I/O rail controller; uses A0 pin to assign unique I²C address per bank for individual voltage programming. Use Value: Eliminates need for multiple discrete regulators - one MP8868GLE-Z per bank supports 1.2V, 1.35V, 1.5V, or 1.8V via software command. |
| ASIC Test Interface Supply | Distributed Telecom Power |
|
Use Scenario: Provides stable, sequenced power to ASIC evaluation boards during functional validation and boundary-scan testing. IC Role / Device Role / Timing Role: Regulator with programmable soft-start and PG feedback; coordinates with test controller via I²C for pass/fail assertion. Use Value: Prevents inrush-induced test failures; PG signal confirms valid rail before test vectors are applied. |
Use Scenario: Delivers 10A intermediate bus power in compact telecom line cards where space and thermal density are constrained. IC Role / Device Role / Timing Role: High-density POL converter; uses SYNC pin to align switching edges with system clock, minimizing conducted EMI. Use Value: Reduces required input capacitance by 40% versus non-synchronized designs due to predictable ripple current phase. |
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 |
|---|---|---|---|
| TPS546D24RQF | 4.5V–18V input, 60A max, PMBus interface, integrated inductor option - higher current, more complex digital control. | Targets server VR13/VR14 compliance; lacks pre-bias startup and hiccup OCP; requires external compensation. | Select when >10A output or PMBus telemetry (temperature, current, voltage margining) is required. |
| ISL8206MIRZ | 4.5V–14V input, 6A max, I²C interface, 12-bit VOUT resolution - lower current, smaller QFN-15 package. | Designed for space-constrained embedded systems; no AAM mode; PG asserts on both OV and UV events. | Select for cost-sensitive, lower-current applications where 6A suffices and OV-triggered PG is acceptable. |
Compared with TPS546D24RQF and ISL8206MIRZ, MP8868GLE-Z uniquely balances 10A capability, I²C simplicity, hiccup OCP, and pre-bias startup - making it optimal for FPGA/SoC core rails where reliability under transient fault conditions and software-defined voltage agility are prioritized over telemetry or ultra-high current.
Availability
MP8868GLE-Z is available at Aetrix Electronics and suitable for FPGA-based systems, SoC core power delivery, and distributed telecom power applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MP8868GLE-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 mixed-signal ICs for power management, motion control, and automotive applications.
The MP8868 belongs to MPS's high-current, digitally configurable DC/DC converter product line, designed specifically for dynamic voltage scaling in advanced computing and programmable logic platforms.
FAQ
What is the minimum recommended soft-start capacitor value for MP8868GLE-Z?
The MP8868GLE-Z uses a 10μA internal current source to charge the SS pin capacitor. For a typical 10ms soft-start time with VREF = 0.6V, CSS = (10ms × 10μA) / 0.6V ≈ 167nF. A 220nF X7R ceramic capacitor is recommended to ensure monotonic ramp-up and accommodate tolerance and temperature drift.
Does MP8868GLE-Z support output voltage sequencing with other power rails?
Yes - the EN/SYNC pin supports precise enable timing control, and the I²C interface allows coordinated VOUT programming across multiple MP8868 devices using unique A0 addresses. Combined with PG feedback, it enables robust power-up/down sequencing in multi-rail systems without external supervisors.
How does the hiccup-mode overcurrent protection behave during a sustained short circuit?
Under sustained short, the MP8868GLE-Z enters hiccup mode after valley-current limit triggers and output drops below 70% VREF. It disables switching for ~10ms, then attempts restart. Average short-circuit current remains below 1A, limiting junction temperature rise and preventing thermal runaway without external current limiting.
Can MP8868GLE-Z operate with a pre-biased output voltage?
Yes - the MP8868GLE-Z supports monotonic startup into pre-biased outputs. During startup, the SS capacitor charges until its voltage exceeds the sensed VOUT level; only then does the controller begin switching, preventing reverse current flow and ensuring controlled ramp-up.
Is the PG pin asserted during overvoltage conditions?
No - the PG pin responds exclusively to undervoltage (VFB < 70% VREF) with 100μs deglitching. Overvoltage events trigger internal linear discharge (35Ω to GND) but do not affect PG state. OVP status is available only via I²C register bit (OV_FLAG), not the physical PG pin.
What is the maximum allowable capacitive load on the SDA and SCL pins?
The MP8868GLE-Z I²C port supports up to 400pF total bus capacitance per line (SDA or SCL), compliant with Fast-mode Plus (1Mbps) specifications. With 3.3V VBUS, rise/fall times remain within spec (≤300ns) when using 2.2kΩ pull-ups and maintaining PCB trace length <10cm.
How is the bootstrap capacitor charged, and what is its minimum required value?
The BST capacitor is charged through an internal diode and regulator from VIN during LS-FET conduction. A 0.1μF X7R ceramic capacitor (rated ≥10V) is required between BST and SW. Lower values risk insufficient gate drive during high-duty-cycle operation, causing HS-FET dropout and thermal stress.
MP8868GLE-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:
- Programmable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 21V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 1.87V
- Current - Output:
- 10A
- Frequency - Switching:
- 200kHz ~ 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-QFN (3x4)
MP8868GLE-Z FAQ
1.How can I place an order for MP8868GLE-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP8868GLE-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 MP8868GLE-Z reliable?
The price and inventory of MP8868GLE-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP8868GLE-Z is usually 5 days.
3.What payment methods are accepted for MP8868GLE-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP8868GLE-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP8868GLE-Z?
MP8868GLE-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP8868GLE-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 MP8868GLE-Z?
For technical support, including MP8868GLE-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP8868GLE-Z requirements.
6.How does Aetrix verify that MP8868GLE-Z is sourced from the original manufacturer or authorized distributors?
All MP8868GLE-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 MP8868GLE-Z meets industry standards.
7.What is the process for return or replacement of MP8868GLE-Z?
All MP8868GLE-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP8868GLE-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 MP8868GLE-Z part is unused and in its original packaging.
Return procedure for MP8868GLE-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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