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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > DC DC Switching Controllers

Monolithic Power Systems Inc. MPQ2908AGF-P

Name: MPQ2908AGF-P
Brand: Monolithic Power Systems Inc.
SKU: MPQ2908AGF-P
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MPQ2908AGF-P

Manufacturer:: Monolithic Power Systems Inc.

Category:: DC DC Switching Controllers

Package:: 20-TSSOP (0.173", 4.40mm Width) Exposed Pad

Datasheet:: MPQ2908AGF-P.pdf

Description:: INDUSTRIAL GRADE, 4V-60V INPUT,

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MPQ2908AGF-P from Monolithic Power Systems is a high-voltage, AEC-Q100 Grade-1 qualified, current-mode synchronous step-down controller supporting 4V–60V input and driving dual N-channel MOSFETs. It delivers precise 0.8V ±1.5% reference regulation, programmable 100–1000kHz switching frequency, and advanced asynchronous modulation (AAM) for light-load efficiency-used in automotive engine control units and industrial 24V/48V power rails.

For engineers reviewing the MPQ2908AGF-P datasheet, MPQ2908AGF-P pinout, MPQ2908AGF-P application, or MPQ2908AGF-P equivalent, key selection criteria include its dual-gate drive capability, 99.5% max duty cycle for cold-crank operation, integrated OVP/OCP/thermal shutdown, and TSSOP-20-EP wettable flank package for automotive-grade solder joint inspection.

Technical Context

The MPQ2908AGF-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 modes via the CCM/AAM pin, where AAM enables variable-frequency operation below 10% load to reduce switching losses.

It features dual independent gate drivers: TG with 2Ω pull-up/1Ω pull-down and 92ns minimum on-time, BG with 3Ω pull-up/1Ω pull-down and 175ns minimum on-time, plus bootstrap (BST) supply management with 3.05V UVLO and automatic low-dropout refresh during deep dropout conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	4V to 60V - supports automotive battery transients including cold-crank (4.5V) and load-dump (60V).
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 systems.
Max Duty Cycle	99.5% - sustains regulation during ultra-low VIN conditions such as automotive cranking.
Current Sense Threshold	25mV / 50mV / 75mV selectable via ILIM pin - sets peak inductor current limit without external amplification.
OVP Threshold	115% of VFB (±5%) - triggers immediate discharge mode to protect downstream loads from overvoltage damage.
Thermal Shutdown	170°C with 20°C hysteresis - prevents permanent silicon damage while enabling safe recovery after cooling.

Pinout & Package

MPQ2908AGF-P is housed in a thermally enhanced TSSOP-20-EP package with wettable flank leads for automated optical solder-joint inspection-critical for AEC-Q100 automotive production. The exposed pad must be connected to both SGND and PGND for optimal thermal performance (θJA = 40°C/W).

Pin/Terminal	Circuit Role	Design Meaning
IN (Pin 1)	Main input supply connection	Accepts 4V–60V; requires local ceramic decoupling to suppress high di/dt transients.
EN/SYNC (Pin 2)	Enable and external clock input	1.22V enable threshold with 130mV hysteresis; accepts 100–1000kHz sync signal for EMI reduction.
VCC2 (Pin 3)	External bias supply input	Enables high-efficiency VCC1 derivation from secondary rail (4.7V–12V), reducing dissipation vs. VIN-based bias.
VCC1 (Pin 4)	Internal bias regulator output	5V ±5% regulated supply for gate drivers and analog circuitry; requires ≥1μF PGND-decoupling.
SGND (Pin 5)	Signal ground reference	Low-noise return for FB, COMP, SS, and sense inputs; must be star-connected to output capacitor negative terminal.
SS (Pin 6)	Soft-start timing control	Charged by 4μA internal current source; sets ramp time via external capacitor to prevent output overshoot at startup.
COMP (Pin 7)	Error amplifier output	Drives external R-C compensation network to stabilize loop response and optimize transient performance.
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)	Mode selection control	Configures CCM (float/VCC1) or AAM (resistor-to-SGND); AAM voltage ≥480mV required for valid light-load operation.
FREQ (Pin 10)	Frequency programming node	Resistor-to-SGND sets oscillator frequency; also accepts external sync clock when EN/SYNC is used for sync.
PG (Pin 11)	Power-good open-drain output	Asserts low when VOUT deviates >±10% from setpoint; 28μs delay ensures stable regulation before assertion.
ILIM (Pin 12)	Current-limit threshold select	Three fixed options: 25mV (SGND), 50mV (VCC1), 75mV (float) - defines peak inductor current trip point.
SYNCO (Pin 13)	Synchronous clock output	180° out-of-phase clock for interleaved dual-phase operation; enables multi-phase scaling without external logic.
SENSE− (Pin 14)	Negative current-sense input	Completes differential sense path with SENSE+; common-mode range 0–25V supports high-side sensing.
SENSE+ (Pin 15)	Positive current-sense input	Differential input referenced to SENSE−; supports Kelvin connections to minimize PCB trace resistance errors.
PGND (Pin 16)	Power ground return	High-current return for VCC1 regulator and bottom gate driver; must be directly tied to VCC1 capacitor negative.
BG (Pin 17)	Bottom gate driver output	Drives synchronous N-MOSFET source; 1Ω pull-down ensures fast turn-off and prevents shoot-through.
SW (Pin 18)	Switch node	Connects to inductor and MOSFET sources; serves as return for BST capacitor and high-side driver floating supply.
TG (Pin 19)	Top gate driver output	Floats with SW node; drives high-side N-MOSFET gate using BST-supplied charge; 2Ω pull-up enables fast turn-on.
BST (Pin 20)	Bootstrap supply input	Charged via external diode from VCC1; powers TG driver; includes 3.05V UVLO to prevent weak high-side drive.

Key Features

Feature	Design Value
AEC-Q100 Grade-1 qualification	Validated for automotive applications operating from –40°C to +125°C ambient with full reliability testing.
Wettable flank TSSOP-20-EP	Enables automated X-ray and AOI inspection of solder joints-mandatory for Tier-1 automotive manufacturing.
Programmable soft-start	External capacitor sets ramp time; prevents inrush current and output overshoot during cold-start sequences.
180° SYNCO output	Supports seamless interleaving of two MPQ2908AGF-P controllers for doubled current capacity and reduced output ripple.
Low-dropout operation	Maintains regulation down to VIN = VOUT + 0.5V via dynamic BST refresh-critical for automotive cranking.
Integrated OVP with discharge mode	Forces LS-FET conduction to rapidly collapse VOUT during overvoltage events, protecting downstream ICs and sensors.

Applications

Automotive Engine Control Unit (ECU)

Industrial 48V Telecom Power Supply

Use Scenario: Regulating 12V/5V rails from unstable vehicle battery (5V–16V nominal, up to 60V during load dump).

IC Role / Device Role / Timing Role: Primary step-down controller managing dual N-MOSFET power stage with AAM for idle-state efficiency and 99.5% duty cycle for cranking survival.

Use Value: Eliminates need for discrete UVLO, OVP, and thermal protection circuits while meeting AEC-Q100 Grade-1 requirements.

Use Scenario: Generating isolated 3.3V/1.8V supplies from 48V intermediate bus in base station power systems.

IC Role / Device Role / Timing Role: High-efficiency synchronous buck controller with programmable 300kHz frequency to avoid AM radio band interference.

Use Value: Reduces system BOM count by integrating dual gate drivers, precision reference, and comprehensive fault protection.

Railway Onboard Signaling System

Heavy-Duty Vehicle Telematics Module

Use Scenario: Converting 72V nominal traction battery to 5V logic supply in train control electronics with wide temperature range.

IC Role / Device Role / Timing Role: Input-stage controller handling 4V–60V range and providing PG output for system-level power sequencing and health monitoring.

Use Value: Enables single-chip solution for harsh-environment power conversion with validated long-term reliability per IEC 62279.

Use Scenario: Powering GPS, CAN, and cellular modems in construction equipment exposed to vibration, dust, and extreme temperatures.

IC Role / Device Role / Timing Role: AEC-Q100-compliant controller delivering robust 5V/3A output with hiccup-mode OCP for short-circuit resilience.

Use Value: Guarantees uninterrupted operation during engine start-stop cycles and withstands ISO 7637-2 pulse 5a/b transients.

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 6V–100V input; no integrated VCC1 LDO; requires external bootstrap diode and bias supply.	Targeted at industrial/high-voltage systems; lacks AEC-Q100 qualification and wettable flank packaging.	Select when input exceeds 60V or when external bias control is preferred over integrated VCC2 option.
TPS40210DGQR	4.5V–52V input; current-mode only (no AAM); 500kHz max frequency; no SYNCO output.	Designed for cost-sensitive industrial converters; not qualified for automotive use or high-reliability transport systems.	Choose for non-automotive 24V/48V systems where light-load efficiency and phase interleaving are not required.

Compared with LM5116PWPR and TPS40210DGQR, the MPQ2908AGF-P uniquely combines AEC-Q100 Grade-1 compliance, wettable flank packaging, integrated VCC2 bias option, and 180° SYNCO for scalable multi-phase designs-making it the only drop-in solution for automotive and railway power modules requiring zero-defect solder joint assurance.

Availability

MPQ2908AGF-P is available at Aetrix Electronics and suitable for automotive ECU power supplies, industrial 48V telecom systems, railway signaling electronics, and heavy-duty vehicle telematics requiring stable component supply with full AEC-Q100 traceability and long-term lifecycle support.

Supply support for MPQ2908AGF-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 power management ICs, with core expertise in DC/DC converters, LED drivers, and motor drivers for automotive, industrial, and computing markets.

The MPQ2908A product line delivers high-voltage synchronous buck controllers optimized for automotive-grade reliability, featuring integrated gate drivers, comprehensive protection, and AEC-Q100 qualification for under-hood and chassis-mounted power systems.

FAQ

What is the purpose of the VCC2 pin on the MPQ2908AGF-P?

VCC2 provides an external bias source (4.7V–12V) to power the internal VCC1 regulator, bypassing the VIN-based LDO. This reduces power dissipation and improves efficiency-especially useful when deriving VCC2 from a secondary regulated rail like the MPQ2908AGF-P's own output or another converter's 5V/12V supply.

How does the MPQ2908AGF-P achieve 99.5% maximum duty cycle?

The MPQ2908AGF-P achieves 99.5% duty cycle through low-dropout mode: when BST–SW falls below 3.05V, the controller disables the high-side FET and activates the low-side FET to recharge the BST capacitor. Once refreshed, the HS-FET resumes conduction-extending effective on-time beyond typical bootstrap limitations.

Can the MPQ2908AGF-P operate without an external bootstrap diode?

No. An external diode from VCC1 to BST is mandatory to charge the BST capacitor during startup and low-duty-cycle operation. The datasheet recommends a Schottky diode (e.g., RB520S-30) with <0.4V forward voltage and sufficient current rating to sustain gate drive under full load.

What happens during output over-voltage protection (OVP) activation?

When FB exceeds 115% of 0.8V, the MPQ2908AGF-P enters discharge mode: the high-side FET turns off, the low-side FET turns on continuously, and inductor current reverses until the reverse current limit triggers. The LS-FET then cycles on/off via zero-current detection until VOUT recovers-preventing sustained overvoltage stress on downstream components.

Is the MPQ2908AGF-P compatible with QFN-20 packages for footprint interchangeability?

No. MPQ2908AGF-P is specifically the TSSOP-20-EP variant with wettable flank leads. The QFN-20 version is MPQ2908AGL-P (or -AEC1). While electrically identical, the packages differ in thermal performance (θJA = 40°C/W vs. 48°C/W), mounting process, and solder joint inspection methodology-requiring separate PCB footprints and reflow profiles.

How is current limit threshold selected using the ILIM pin?

ILIM offers three fixed current-sense thresholds: connect to SGND for 25mV, to VCC1 for 50mV, or leave floating for 75mV. These correspond to peak inductor current limits of I_LIM = V_ILIM/R_SENSE, enabling precise overcurrent protection without trimming resistors or external amplifiers.

Does the MPQ2908AGF-P support spread-spectrum frequency modulation?

No. The MPQ2908AGF-P supports only fixed-frequency PWM (via FREQ resistor) or external clock synchronization (via EN/SYNC). It does not implement internal spread-spectrum modulation; EMI reduction relies on precise frequency selection, layout optimization, and optional external sync with jitter-free clocks.

MPQ2908AGF-P Specifications

Product attributes: Attribute value

Manufacturer:: Monolithic Power Systems Inc.

Series:: MPQ

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 ~ 60V

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, Sync

Operating Temperature:: -40°C ~ 125°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: 20-TSSOP-EP

MPQ2908AGF-P FAQ

1.How can I place an order for MPQ2908AGF-P through Aetrix?

Please submit a Request for Quotation (RFQ) for MPQ2908AGF-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 MPQ2908AGF-P reliable?

The price and inventory of MPQ2908AGF-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPQ2908AGF-P is usually 5 days.

3.What payment methods are accepted for MPQ2908AGF-P?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ2908AGF-P transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MPQ2908AGF-P?

MPQ2908AGF-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MPQ2908AGF-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 MPQ2908AGF-P?

For technical support, including MPQ2908AGF-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ2908AGF-P requirements.

6.How does Aetrix verify that MPQ2908AGF-P is sourced from the original manufacturer or authorized distributors?

All MPQ2908AGF-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 MPQ2908AGF-P meets industry standards.

7.What is the process for return or replacement of MPQ2908AGF-P?

All MPQ2908AGF-P units undergo pre-shipment inspection (PSI). If there is an issue with MPQ2908AGF-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 MPQ2908AGF-P part is unused and in its original packaging.

Return procedure for MPQ2908AGF-P:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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