My Inquiry
My Account
Monolithic Power Systems Inc. MP2918GF-P
- Part No.:
- MP2918GF-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
MP2918GF-P.pdf
- Description:
- 4V-40V INPUT, CURRENT MODE SYNCH
- Quantity:
- Payment:
- Shipping:
Inventory:2,375
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MP2918GF-P from Monolithic Power Systems is a high-voltage, current-mode, synchronous step-down DC/DC controller IC designed for automotive and industrial power conversion. It operates from 4V to 40V input, delivers up to 25V output, supports programmable 100–1000kHz switching frequency, integrates dual N-channel MOSFET drivers with 99.5% max duty cycle, and features precision 0.8V ±1.5% feedback reference-enabling robust regulation in cold-crank automotive systems.
For engineers reviewing the MP2918GF-P datasheet, MP2918GF-P pinout, MP2918GF-P application, or MP2918GF-P equivalent, key selection considerations include its dual-gate drive capability, selectable Advanced Asynchronous Mode (AAM) for light-load efficiency, hiccup-mode over-current protection, 180° out-of-phase SYNCO output for multi-phase synchronization, and dual power supply options (VIN- or VCC2-derived VCC1).
Technical Context
The MP2918GF-P implements peak current-mode control with cycle-by-cycle current limiting and slope compensation, using an internal 0.8V reference and error amplifier with 70dB DC gain and 500μS transconductance. Its PWM architecture supports both forced CCM and AAM operation, where AAM dynamically adjusts switching frequency based on COMP voltage crossing a user-set VAAM threshold.
It integrates independent high-side (TG) and low-side (BG) gate drivers with 2Ω pull-up/1Ω pull-down resistance, 60ns dead time, and bootstrap (BST) supply management with 3.05V UVLO. Protection logic includes precision OVP (110–120% VFB), hiccup OCP triggered at 25/50/75mV sense thresholds, and thermal shutdown at 170°C with 20°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 40V - supports automotive battery transients including cold-crank down to 4V. |
| Feedback Reference | 0.800V ±1.5% - enables accurate output regulation across -40°C to +125°C junction temperature. |
| Switching Frequency | 100kHz–1000kHz programmable via FREQ resistor or external sync clock - reduces EMI in noise-sensitive applications. |
| Max Duty Cycle | 99.5% - ensures low-dropout operation during input voltage sags without loss of regulation. |
| Current Sense Thresholds | 25mV / 50mV / 75mV selectable via ILIM pin - sets precise peak inductor current limit for over-current protection. |
| Power Good Accuracy | ±10% output window with 37μs rising / 28μs falling delay - provides reliable system power sequencing signal. |
| Gate Driver Strength | TG: 2Ω pull-up / 1Ω pull-down; BG: 3Ω pull-up / 1Ω pull-down - drives standard N-channel MOSFETs with fast edge rates and minimal shoot-through risk. |
Pinout & Package
MP2918GF-P is packaged in TSSOP-20-EP (exposed pad), with thermal pad electrically isolated and intended for connection to SGND/PGND for optimal thermal performance. Pin numbering follows standard TSSOP-20 top-view orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 1) | Main input supply rail | Accepts 4–40V input; requires local ceramic decoupling to suppress high-frequency spikes. |
| EN/SYNC (Pin 2) | Enable and clock synchronization input | 1.22V enable threshold with 130mV hysteresis; accepts external 100–1000kHz sync clock for EMI reduction. |
| VCC2 (Pin 3) | External bias supply for VCC1 regulator | Enables efficient VCC1 derivation from secondary rail (4.7–12V); disables VIN-based VCC1 when active. |
| VCC1 (Pin 4) | Internal bias supply output | 5V ±10% regulated output powering gate drivers and core logic; requires ≥1μF PGND-decoupled capacitor. |
| SGND (Pin 5) | Signal ground reference | Low-noise analog ground for FB, COMP, SS; must be routed separately from PGND and tied at single point near output capacitors. |
| SS (Pin 6) | Soft-start timing control | Charged by 4μA internal current source; external capacitor sets ramp time to prevent output overshoot at startup. |
| COMP (Pin 7) | Error amplifier compensation node | Connect R-C network to SGND to stabilize control loop; directly controls PWM duty cycle via current-mode comparator. |
| FB (Pin 8) | Output voltage feedback input | Compares divider output against 0.8V reference; 10nA input bias enables high-impedance resistive dividers. |
| CCM/AAM (Pin 9) | Conduction mode selection | Logic level determines operating mode: float/VCC1 = CCM; SGND-biased = AAM for light-load efficiency optimization. |
| FREQ (Pin 10) | Frequency programming | Resistor to SGND sets oscillator frequency; supports 100–1000kHz range with ±10% tolerance. |
| PG (Pin 11) | Open-drain power-good indicator | Pulled low when VOUT deviates >±10% from setpoint; 2μA leakage enables direct MCU GPIO interface. |
| ILIM (Pin 12) | Current limit threshold selection | Three fixed sense voltages (25/50/75mV) selected by connecting to SGND, VCC1, or floating - defines OCP trip point. |
| SYNCO (Pin 13) | Synchronization output | 180° out-of-phase clock signal for interleaving second MP2918 channel - reduces input/output ripple in dual-phase designs. |
| SENSE− (Pin 14) | Negative current sense input | High-side or low-side current sensing node; common-mode range 0–25V supports various shunt placements. |
| SENSE+ (Pin 15) | Positive current sense input | Differential pair with SENSE−; 0.7V max differential range ensures accurate valley/peak current detection. |
| PGND (Pin 16) | Power ground return | High-current return path for VCC1 regulator and low-side driver; must connect directly to VCC1 capacitor negative terminal. |
| BG (Pin 17) | Bottom gate driver output | Drives low-side N-MOSFET gate; 1Ω pull-down ensures fast turn-off and prevents shoot-through during dead time. |
| SW (Pin 18) | Switch node | Connection point between high- and low-side MOSFETs; serves as BST capacitor return and high-current AC path. |
| TG (Pin 19) | Top gate driver output | Bootstrapped floating driver for high-side N-MOSFET; 2Ω pull-up enables fast turn-on under varying BST voltage. |
| BST (Pin 20) | Bootstrap supply | Charged via diode from VCC1 to SW; powers TG driver; requires ceramic capacitor to SW for stable high-side operation. |
Key Features
| Feature | Design Value |
|---|---|
| Dual N-channel MOSFET driver integration | Eliminates need for external high-side driver IC or charge pump, reducing BOM count and layout complexity in high-voltage buck designs. |
| Advanced Asynchronous Mode (AAM) | Reduces light-load quiescent current to 250–350μA and improves efficiency below 10% load by dynamically scaling switching frequency. |
| Programmable hiccup-mode over-current protection | Prevents thermal runaway during sustained short-circuit by limiting average fault current and enabling automatic recovery after fault removal. |
| 180° out-of-phase SYNCO output | Enables seamless two-phase interleaved operation with matched timing, cutting input/output ripple current by up to 50% versus single-phase. |
| Low-dropout operation with 99.5% duty cycle | Maintains regulation during automotive cold-crank events (e.g., 6V input → 5V output) without requiring additional LDO pre-regulation. |
Applications
| Automotive Infotainment Power Supply | Industrial PLC I/O Module |
|---|---|
Use Scenario: Powers 5V/3.3V rails for head-unit processors, display drivers, and audio codecs in 12V/24V vehicle electrical systems. IC Role / Device Role / Timing Role: Primary synchronous buck controller regulating main system voltage; manages cold-crank (4V–40V) transients and EMI-sensitive audio band. Use Value: 99.5% max duty cycle maintains regulation during engine start; AAM extends battery runtime in standby; SYNCO enables dual-rail interleaving for cleaner audio power. | Use Scenario: Generates isolated 12V/5V supplies for digital I/O, analog sensor interfaces, and communication modules in factory automation controllers. IC Role / Device Role / Timing Role: High-reliability step-down controller for DIN-rail mounted PLCs; handles wide-input industrial supplies (18–36V DC) and surge immunity requirements. Use Value: Precision 0.8V ±1.5% reference ensures stable ADC reference voltage; hiccup OCP protects against field-wiring faults; thermal shutdown prevents damage in enclosed enclosures. |
| Telecom Remote Radio Unit (RRU) | Medical Diagnostic Imaging Power |
Use Scenario: Provides 12V intermediate bus for RF power amplifiers and FPGA-based baseband processing in outdoor 4G/5G small cells. IC Role / Device Role / Timing Role: High-efficiency, noise-controlled controller synchronizing to system clock to avoid interference with sensitive RF front-end signals. Use Value: External sync capability (100–1000kHz) eliminates beat frequencies; low EMI due to controlled dV/dt gate drivers; PG signal enables real-time health monitoring. | Use Scenario: Supplies tightly regulated 3.3V/1.8V rails for high-speed image sensor interfaces and FPGA configuration in portable ultrasound and X-ray equipment. IC Role / Device Role / Timing Role: Safety-critical power controller with redundant OVP/OCP and precise soft-start to prevent imaging artifacts during power-up. Use Value: 37μs PG rising delay ensures clean power sequencing before sensor initialization; ±1.5% VREF guarantees consistent ADC linearity; RoHS/lead-free compliance meets medical regulatory standards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5116PWPR | Wider 6–100V input range; no integrated VCC2 option; uses voltage-mode control instead of current-mode. | Better suited for 48V telecom or industrial HV inputs; lacks AAM for light-load efficiency optimization. | Select LM5116PWPR only if input exceeds 40V or voltage-mode control is required for specific loop stability needs. |
| RT7297BZSP | 4–36V input; integrated high-side driver only (no dual-N driver); fixed 500kHz frequency; no SYNC or SYNCO capability. | Lower-cost solution for non-synchronized, single-phase applications; missing interleaving support and programmable frequency. | Choose RT7297BZSP for cost-sensitive, fixed-frequency designs where AAM, sync, and dual-phase are unnecessary. |
Compared with LM5116PWPR and RT7297BZSP, the MP2918GF-P uniquely combines 4–40V operation, dual-N gate drivers, AAM, 180° SYNCO, and VCC2 bias flexibility-making it optimal for automotive and industrial systems demanding efficiency, synchronization, and transient resilience.
Availability
MP2918GF-P is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial PLC power modules, and telecom remote radio units requiring stable component supply, long-term lifecycle support, and AEC-Q100-aligned reliability.
Supply support for MP2918GF-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 MP2918 product line targets high-voltage DC/DC conversion in automotive and industrial environments, emphasizing wide-input operation, robust protection, and flexible control modes for mission-critical power systems.
FAQ
What is the maximum supported input voltage for continuous operation?
The MP2918GF-P is rated for continuous operation up to 40V input. Its absolute maximum rating is 65V, but sustained operation above 40V risks exceeding thermal limits and violating recommended operating conditions. The device includes input UVLO with 4.5V rising threshold and 800mV hysteresis to ensure safe startup and shutdown behavior within the 4–40V range.
How does the ILIM pin configure current limit thresholds?
The ILIM pin selects one of three fixed current-sense voltage thresholds: 25mV when tied to SGND, 50mV when tied to VCC1, or 75mV when left floating. These correspond to nominal peak inductor current limits. The selection directly sets the trip point for hiccup-mode over-current protection and is independent of external shunt resistor value-only the sense voltage matters.
Can MP2918GF-P operate without an external bootstrap diode?
No. The MP2918GF-P requires an external Schottky diode (e.g., 1N5819) from VCC1 to BST to charge the bootstrap capacitor during low-side conduction. The internal circuitry does not provide active BST charging; omission of this diode prevents proper high-side gate drive and causes immediate functional failure or erratic switching.
What is the purpose of the CCM/AAM pin, and how is it configured?
The CCM/AAM pin selects between Continuous Conduction Mode (CCM) and Advanced Asynchronous Mode (AAM). Connect to VCC1 or leave floating for CCM; tie to SGND via resistor to set VAAM ≥480mV for AAM. In AAM, switching frequency scales inversely with load, reducing light-load quiescent current to ~250–350μA while maintaining regulation.
Is the PG output compatible with 3.3V microcontrollers?
Yes. The PG pin is an open-drain output with 2μA leakage and 0.3V max low-level voltage at 4mA sink current. It can be pulled up to 3.3V via a 10kΩ–100kΩ resistor and directly interfaced to 3.3V GPIO pins without level-shifting, provided the MCU input high threshold is ≤3.0V.
Does MP2918GF-P support output voltages above 12V?
Yes. The MP2918GF-P regulates outputs up to 25V, as specified in Recommended Operating Conditions. Output voltage is set by the FB resistive divider ratio. For >12V outputs, ensure external MOSFETs and output capacitors are rated accordingly, and verify BST capacitor voltage remains within 6.5V differential limit relative to SW.
How is thermal performance affected by package choice?
The MP2918GF-P uses TSSOP-20-EP, which has θJA = 40°C/W and θJC = 8°C/W-superior to QFN-20 (θJA = 48°C/W) for PCBs with limited copper area. The exposed pad must be soldered to a thermal pad connected to both SGND and PGND planes to achieve rated 3.1W power dissipation at 25°C ambient.
MP2918GF-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- MP
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Type:
- Transistor Driver
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Number of Outputs:
- 1
- Output Phases:
- 1
- Voltage - Supply (Vcc/Vdd):
- 4V ~ 40V
- Frequency - Switching:
- 100kHz ~ 1MHz
- Duty Cycle (Max):
- 99.5%
- Synchronous Rectifier:
- Yes
- Clock Sync:
- Yes
- Serial Interfaces:
- -
- Control Features:
- Current Limit, Dead Time Control, Enable, Frequency Control, Power Good, Soft Start
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP-EP
MP2918GF-P FAQ
1.How can I place an order for MP2918GF-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2918GF-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 MP2918GF-P reliable?
The price and inventory of MP2918GF-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP2918GF-P is usually 5 days.
3.What payment methods are accepted for MP2918GF-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2918GF-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2918GF-P?
MP2918GF-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2918GF-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 MP2918GF-P?
For technical support, including MP2918GF-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2918GF-P requirements.
6.How does Aetrix verify that MP2918GF-P is sourced from the original manufacturer or authorized distributors?
All MP2918GF-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 MP2918GF-P meets industry standards.
7.What is the process for return or replacement of MP2918GF-P?
All MP2918GF-P units undergo pre-shipment inspection (PSI). If there is an issue with MP2918GF-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 MP2918GF-P part is unused and in its original packaging.
Return procedure for MP2918GF-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MP2918GF-P Tags
-
UCC28C45DR
Texas Instruments
-
UCC28C40DR
Texas Instruments
-
UCC28C43DR
Texas Instruments
-
ZXSC410E6TA
Diodes Incorporated
-
LM3524DMX/NOPB
Texas Instruments
-
LM3489MMX/NOPB
Texas Instruments
-
MIC2102YML-TR
Microchip Technology
-
LM5148RGYR
Texas Instruments
-
TL598CDR
Texas Instruments
-
LM5155DSSR
Texas Instruments
-
LM25085MYX/NOPB
Texas Instruments
-
UCC2813DTR-0
Texas Instruments
Tech Hub
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…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…
