My Inquiry
My Account
Monolithic Power Systems Inc. MP8758HGL-Z
_-_-21.jpg)
- Part No.:
- MP8758HGL-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 21-PowerVFQFN
- Datasheet:
-
MP8758HGL-Z.pdf
- Description:
- IC REG BUCK ADJ 10A 21QFN
- Quantity:
- Payment:
- Shipping:
Inventory:13,656
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MP8758HGL-Z from Monolithic Power Systems is a high-current, synchronous step-down DC-DC converter delivering up to 10A continuous output current with 4.5V–22V input range, 0.604V–5.5V adjustable output, and 500kHz fixed switching frequency. It integrates low-RDS(ON) MOSFETs (25mΩ HS / 9mΩ LS), uses constant-on-time (COT) control for fast transient response, and features hiccup-mode over-current protection and auto-retry thermal shutdown. It is deployed in flat-panel TV power rails requiring compact, high-efficiency point-of-load regulation.
For engineers reviewing the MP8758HGL-Z datasheet, MP8758HGL-Z pinout, MP8758HGL-Z application, or MP8758HGL-Z equivalent, key selection criteria include its COT-based light-load PFM/PWM mode selection, open-drain power-good signal timing (800μs delay), valley-current OCP threshold (10–12A), thermal shutdown at 150°C with 25°C hysteresis, and QFN-21 (3mm×4mm) package with exposed thermal pad.
Technical Context
The MP8758HGL-Z implements a constant-on-time (COT) control architecture that dynamically adjusts on-time based on input and output voltage to maintain ~500kHz switching frequency across operating conditions. Its valley-current sensing uses the low-side MOSFET's RDS(ON) for cycle-by-cycle over-current detection, triggering hiccup-mode recovery upon sustained overload.
It supports dual operation modes via the MODE pin: forced PWM for fixed-frequency noise control or PFM for high light-load efficiency, with seamless transition between modes. The internal 5V VCC LDO powers gate drivers and control logic, while the open-drain PG pin asserts after soft-start completion when FB voltage remains within 95–105% of 604mV reference for ≥800μs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 22V - Supports wide industrial and consumer input rails including 5V, 12V, and 24V systems without external pre-regulation. |
| Output Current | 10A continuous - Delivers full rated load with thermal management via QFN-21 exposed pad (θJA = 50°C/W). |
| Switching Frequency | 400–600kHz (typ. 500kHz) - Enables use of small 1.2μH inductors and ceramic output capacitors while balancing EMI and efficiency. |
| Feedback Reference | 604mV ±9mV - Sets precise output voltage via external resistor divider; enables 0.604V–5.5V adjustment with <±1% line/load regulation. |
| OCP Threshold | 10–12A valley current - Triggers hiccup-mode shutdown during sustained overload, limiting average short-circuit current and die temperature rise. |
| Thermal Shutdown | 150°C with 25°C hysteresis - Auto-retries after cooldown; prevents permanent damage during airflow-limited or high-ambient deployments. |
| Power Good Delay | 800μs - Ensures stable output before asserting PG high, enabling reliable downstream power sequencing in multi-rail systems. |
Pinout & Package
MP8758HGL-Z is housed in a thermally enhanced QFN-21 package (3mm × 4mm, 0.5mm pitch) with an exposed thermal pad (Pins 10, 11, 20, 21) requiring solder connection to PCB ground plane for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST (Pin 1) | Bootstrap supply | Connects to SW node via 0.1μF ceramic capacitor to generate floating gate drive voltage for high-side MOSFET. |
| SW (Pins 2,3) | Switch node | Drives external inductor; experiences VIN-referenced swing up to 24.3V and negative swing down to –3V (30ns); requires short/wide PCB routing. |
| VOUT (Pins 5,6) | Output voltage sense | Direct connection to output capacitor cathode; used for remote sensing to improve load regulation accuracy. |
| AGND (Pin 8) | Analog reference ground | Reference point for internal 604mV bandgap; must tie FB divider ground here-not to PGND-to minimize noise-induced regulation error. |
| MODE (Pin 9) | Operation mode select | Pulled internally high; logic-high → PFM mode (efficiency-optimized), logic-low → forced PWM (EMI-controlled); floating defaults to PFM. |
| PGND (Pins 10,11,20,21) | Power ground return | Low-impedance path for high di/dt switch currents; must connect to PCB ground plane using multiple vias under exposed pad. |
| VIN (Pins 12,19) | Main input supply | Accepts 4.5–22V; requires local 10μF+ ceramic decoupling near pin; wide traces reduce IR drop and EMI. |
| PG (Pin 13) | Open-drain power good | Sinks 4mA when faulted; requires external pull-up (e.g., to VCC); asserts high only after soft-start and FB stability window (95–105% VREF). |
| FB (Pin 14) | Feedback input | High-impedance (10–50nA) node; connects to resistor divider tap; sensitive to layout-no vias, minimal trace length. |
| GND (Pin 15) | System ground reference | Must be connected to either AGND or PGND; establishes common reference for EN, MODE, and internal logic. |
| VCC (Pin 16) | Internal 5.1V LDO output | Supplies gate drivers and control circuitry; requires ≥1μF X7R/X5R ceramic decoupling placed adjacent to pin. |
| EN (Pin 17) | Enable control | Digital input (1.15–1.35V logic low, >VCC–0.4V logic high); 0V disables regulator with <1μA shutdown current. |
Key Features
| Feature | Design Value |
|---|---|
| Proprietary switching loss reduction | Optimized gate drive timing and dead-time control minimizes shoot-through risk while maintaining >92% peak efficiency at 12VIN/1.2VOUT/10A. |
| Internal soft-start | 2.9ms ramp time from 10% to 90% VOUT; prevents inrush current and ensures monotonic startup even with pre-biased outputs. |
| Output discharge function | Activates internal low-side FET after shutdown to rapidly discharge output capacitor-critical for safety-critical or hot-swap applications. |
| Auto-retry thermal shutdown | Enters hiccup mode at 150°C junction temp, cools, then re-attempts soft-start; avoids latch-off failure during transient thermal overload. |
| Hiccup-mode over-current protection | Disables power stage, discharges SS capacitor, and retries startup every ~100ms until fault clears-limits average short-circuit power dissipation. |
Applications
| Flat-Panel Television Power Rails | Multi-Function Printer Main Board |
|---|---|
|
Use Scenario: Supplies 1.2V core voltage to SoC and 3.3V I/O rail to interface controllers in 4K UHD TV main boards with tight board space constraints. IC Role / Device Role / Timing Role: Primary synchronous buck regulator performing point-of-load conversion from 12V intermediate bus; manages dynamic load steps up to 8A/μs. Use Value: COT control delivers <10μs transient recovery; PFM mode maintains >85% efficiency at standby loads (<100mA), reducing system idle power. |
Use Scenario: Powers FPGA configuration logic and motor driver ICs in office MFPs where burst printing causes rapid 0–10A load transitions. IC Role / Device Role / Timing Role: High-current POL regulator with hiccup-mode OCP; handles repeated short-circuit events during paper jam motor stalls. Use Value: Auto-retry thermal shutdown prevents field failures during prolonged jams; 500kHz switching allows compact 1.2μH inductor + 220μF ceramic output stack. |
| Distributed Telecom Power Systems | Industrial PLC CPU Modules |
|
Use Scenario: Generates 1.8V/10A for baseband processor in remote radio head units operating in -40°C to +85°C ambient with limited airflow. IC Role / Device Role / Timing Role: Input-stage buck converter accepting 22V PoE++ or 48V DC-DC derived rail; provides regulated intermediate bus to downstream converters. Use Value: QFN-21 thermal pad + θJA=50°C/W enables full 10A load at 70°C ambient without heatsink; 24V absolute max rating guards against load-dump transients. |
Use Scenario: Powers ARM Cortex-A series CPU and DDR3 memory subsystem in DIN-rail mounted PLC controllers subject to vibration and wide temperature swings. IC Role / Device Role / Timing Role: Primary 5V-to-1.1V buck converter with PG signaling for safe firmware boot sequence and watchdog reset coordination. Use Value: Open-drain PG output with 800μs delay ensures deterministic power sequencing; RoHS/lead-free/halogen-free compliance meets industrial safety standards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-current synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| RTQ2132BGQW | 4.5–18V input, 12A output, 700kHz switching, integrated compensation; no PFM mode, fixed 600mV reference. | Higher current but narrower input range; lacks light-load PFM, requiring external circuitry for ultra-low-power standby. | Select when higher output current and faster transient response are prioritized over light-load efficiency and input flexibility. |
| TPS546D24ARVFT | 4.5–18V input, 10A output, PMBus-enabled, 500kHz, 600mV reference, digital loop compensation. | Supports real-time telemetry and adaptive loop tuning but adds firmware complexity; larger 4.5mm×3.5mm VQFN package. | Select when system-level monitoring, dynamic margining, or multi-converter synchronization is required. |
Compared with RTQ2132BGQW and TPS546D24ARVFT, MP8758HGL-Z offers broader 4.5–22V input support and native PFM/PWM mode selection without external components-making it optimal for cost-sensitive, thermally constrained consumer and industrial designs where analog simplicity and hiccup-mode robustness are critical.
Availability
MP8758HGL-Z is available at Aetrix Electronics and suitable for flat-panel television power rails, multi-function printer main boards, distributed telecom power systems, and industrial PLC CPU modules requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for MP8758HGL-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, and global manufacturing partnerships.
The MP8758H product line targets high-current, space-constrained DC-DC conversion in consumer electronics and industrial equipment, emphasizing integration, thermal resilience, and analog control simplicity over digital configurability.
FAQ
What is the minimum output voltage achievable with MP8758HGL-Z?
The MP8758HGL-Z has a fixed 604mV feedback reference voltage with ±9mV tolerance. Using an external resistor divider, the lowest practical output is 0.604V - achieved when the bottom resistor is omitted and top resistor grounded. Output voltages below this are not supported due to internal reference architecture and FB comparator thresholds.
Can MP8758HGL-Z operate with ceramic output capacitors only?
Yes. The MP8758HGL-Z integrates an internal ramp compensator that stabilizes the constant-on-time control loop without requiring output capacitor ESR. It is fully compatible with low-ESR ceramic capacitors (e.g., 220μF X5R), eliminating the need for aluminum or tantalum bulk capacitance and reducing board area and BOM cost.
How does the hiccup-mode OCP behave during a sustained short circuit?
Upon detecting valley current exceeding 10–12A, the MP8758HGL-Z disables switching, discharges the soft-start capacitor, and enters a ~100ms retry cycle. Each attempt includes full soft-start; if the short persists, it repeats indefinitely. This limits average power dissipation to <1W, preventing thermal runaway while maintaining device integrity.
What is the recommended layout practice for the BST pin?
A 0.1μF X7R ceramic capacitor must be placed directly between BST and SW pins with minimal trace length and no vias. The SW node itself must be routed with wide, short copper polygons to minimize inductance - critical for clean bootstrap charging and preventing high-side gate drive collapse during heavy load transients.
Does MP8758HGL-Z support pre-biased output startup?
Yes. When the output is pre-biased above the target voltage at enable, the MP8758HGL-Z inhibits switching until the internal reference voltage ramps above the sensed FB voltage. This prevents reverse current flow through the low-side MOSFET and ensures monotonic, controlled startup without output voltage overshoot.
What is the maximum allowable voltage on the EN pin?
The EN pin contains an internal 12V Zener clamp. Absolute maximum voltage is 12V; exceeding this risks damaging the clamp structure. When driven from VIN >12V, a resistive divider must limit EN voltage to ≤12V and ensure pull-up current stays below 1mA per datasheet specifications.
How is power-good timing affected by output capacitor ESR?
PG assertion delay (800μs) is independent of output capacitor ESR. However, high ESR can cause excessive VOUT droop during load steps, delaying FB voltage entry into the 95–105% VREF window and thus postponing PG assertion. Low-ESR ceramics ensure timely PG response aligned with actual regulation stability.
MP8758HGL-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):
- 4.5V
- Voltage - Input (Max):
- 22V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 10A
- Frequency - Switching:
- 500kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 21-QFN (3x4)
MP8758HGL-Z FAQ
1.How can I place an order for MP8758HGL-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP8758HGL-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 MP8758HGL-Z reliable?
The price and inventory of MP8758HGL-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP8758HGL-Z is usually 5 days.
3.What payment methods are accepted for MP8758HGL-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP8758HGL-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP8758HGL-Z?
MP8758HGL-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP8758HGL-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 MP8758HGL-Z?
For technical support, including MP8758HGL-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP8758HGL-Z requirements.
6.How does Aetrix verify that MP8758HGL-Z is sourced from the original manufacturer or authorized distributors?
All MP8758HGL-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 MP8758HGL-Z meets industry standards.
7.What is the process for return or replacement of MP8758HGL-Z?
All MP8758HGL-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP8758HGL-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 MP8758HGL-Z part is unused and in its original packaging.
Return procedure for MP8758HGL-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MP8758HGL-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…
