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Monolithic Power Systems Inc. MP2908AGL-P
- Part No.:
- MP2908AGL-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 20-TFQFN Exposed Pad
- Datasheet:
-
MP2908AGL-P.pdf
- Description:
- IC REG BUCK ADJUSTABLE
- Quantity:
- Payment:
- Shipping:
Inventory:4,606
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Product details
Overview
MP2908AGL-P from Monolithic Power Systems is a 4V–60V input, current-mode synchronous step-down controller driving dual N-channel MOSFETs in high-voltage DC/DC conversion. It delivers 0.8V ±1.5% reference accuracy, supports 100–1000kHz programmable switching frequency, and enables advanced asynchronous mode (AAM) for light-load efficiency optimization-used in automotive cold-crank and industrial 24V/48V power systems.
For engineers reviewing the MP2908AGL-P datasheet, MP2908AGL-P pinout, MP2908AGL-P application, or MP2908AGL-P equivalent, key selection criteria include its dual-N-FET gate drive capability, 99.5% max duty cycle for low-dropout operation, precision OVP/OCP protection, and QFN-20 (3mm×4mm) package compatibility with high-density PCB layouts.
Technical Context
The MP2908AGL-P implements peak-current-mode control with slope compensation, cycle-by-cycle current limiting, and internal error amplifier transconductance of 500μS. Its PWM architecture supports both forced CCM and AAM via the CCM/AAM pin, where AAM dynamically adjusts switching frequency based on COMP voltage crossing a user-set VAAM threshold.
It integrates dual gate drivers (TG/BG) with 2Ω TG pull-up, 1Ω TG pull-down, and 175–250ns BG minimum on-time. The bootstrap (BST) supply features UVLO at 3.05V (170mV hysteresis), enabling reliable high-side FET drive during low-VIN conditions like automotive cold-crank.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 60V - supports wide-range industrial and automotive battery inputs including 12V, 24V, and 48V nominal systems. |
| Feedback Reference | 0.800V ±1.5% - enables precise output regulation across –40°C to +125°C junction temperature range. |
| Switching Frequency | 100kHz–1000kHz programmable via external resistor or external sync clock - reduces EMI in noise-sensitive applications. |
| Max Duty Cycle | 99.5% - sustains regulation during deep input undervoltage (e.g., 6V automotive cold-crank into 5V output). |
| Current Sense Threshold | 75mV (ILIM floating) - sets nominal peak inductor current limit with ±10% tolerance over temperature. |
| 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 - provides robust die-level thermal protection without requiring external sensors. |
Pinout & Package
MP2908AGL-P is housed in a thermally enhanced QFN-20 package (3mm × 4mm, 0.5mm pitch) with exposed thermal pad (EP) for efficient heat dissipation in high-power density designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 1) | Main input supply connection | Accepts 4–60V; requires local ceramic decoupling to suppress high-di/dt transients. |
| EN/SYNC (Pin 2) | Enable input / external clock sync node | 1.22V enable threshold; doubles as 100–1000kHz sync input with 100ns min pulse width. |
| VCC2 (Pin 3) | External bias supply for VCC1 regulator | Enables >90% efficiency boost by powering internal circuitry from regulated output rail instead of VIN. |
| VCC1 (Pin 4) | Internal bias rail output | 5V ±3% regulated supply for gate drivers and analog blocks; decoupled with 1–4.7μF ceramic cap. |
| SGND (Pin 5) | Signal ground reference | Low-noise return for FB, COMP, SS; must connect to output capacitor ground to minimize noise coupling. |
| SS (Pin 6) | Soft-start timing control | Charged by 4μA internal current source; sets startup ramp time via external capacitor to prevent output overshoot. |
| COMP (Pin 7) | Error amplifier output | Connect RC network to SGND to stabilize loop response; compensates for external power stage poles/zeros. |
| 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 | Pull to GND (via RAAM) to enable AAM; float or tie to VCC1 for forced CCM operation. |
| FREQ (Pin 10) | Frequency programming node | Resistor to PGND sets oscillator frequency; 65kΩ yields ~300kHz typical switching frequency. |
| PG (Pin 11) | Power-good open-drain output | Asserts low when VOUT deviates >±10% from target; 25μs delay ensures stable regulation before assertion. |
| ILIM (Pin 12) | Current limit threshold select | Three fixed options: GND = 25mV, VCC1 = 50mV, float = 75mV - configures peak inductor current limit. |
| SYNCO (Pin 13) | 180° out-of-phase clock output | Enables interleaved dual-phase operation with second MP2908A for reduced input/output ripple. |
| SENSE− (Pin 14) | Negative current sense input | High-side or low-side current sensing; differential input accepts up to 28V common-mode voltage. |
| SENSE+ (Pin 15) | Positive current sense input | Paired with SENSE−; 0.7V max differential range ensures accurate valley/peak current detection. |
| PGND (Pin 16) | Power ground return | High-current return path for BG driver and VCC1 regulator; must be connected directly to VCC1 cap negative terminal. |
| BG (Pin 17) | Bottom gate driver output | Drives synchronous N-FET source; 1Ω pull-down ensures fast turn-off and prevents shoot-through. |
| SW (Pin 18) | Switch node | High dv/dt node connecting external HS/LS FETs; requires tight layout to minimize EMI and ringing. |
| TG (Pin 19) | Top gate driver output | Floating driver powered by BST capacitor; 2Ω pull-up enables fast HS-FET turn-on under heavy load. |
| BST (Pin 20) | Bootstrap supply input | Charged via diode from VCC1 to SW; maintains >3.05V for HS-FET drive during low-VIN dropout conditions. |
Key Features
| Feature | Design Value |
|---|---|
| Advanced Asynchronous Mode (AAM) | Reduces light-load quiescent current to 250–350μA while maintaining regulation via variable-frequency operation. |
| Dual N-FET Gate Drivers | Integrated TG/BG drivers eliminate need for external drivers; support 100kHz–1MHz operation with <60ns dead time. |
| Programmable Current Limit | Three discrete ILIM settings (25/50/75mV) allow precise peak current tuning without external op-amps or comparators. |
| Pre-bias Start-up Support | Prevents reverse current flow when output is pre-biased; holds TG/BG off until SS voltage exceeds FB voltage. |
| Robust Protection Suite | Includes cycle-by-cycle OCP, hiccup-mode short-circuit recovery, 115% OVP discharge mode, and thermal shutdown with hysteresis. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC Power Supply |
|---|---|
|
Use Scenario: Regulating 12V battery input to 5V/3.3V for microcontrollers and CAN transceivers during cold-crank (down to 6V). IC Role / Device Role / Timing Role: Primary synchronous buck controller managing high-efficiency, high-reliability DC/DC conversion with 99.5% duty cycle capability. Use Value: Maintains stable output during 6V–60V input transients; AAM extends idle battery life in parked vehicle monitoring systems. |
Use Scenario: Converting 24V or 48V factory bus to isolated 12V/5V rails for I/O modules and fieldbus interfaces. IC Role / Device Role / Timing Role: High-voltage step-down controller enabling compact, fanless power design with programmable 100–1000kHz switching. Use Value: Reduces system size and thermal footprint vs. discrete controller + driver solutions; SYNCO enables interleaving for lower input ripple. |
| Telecom Remote Radio Unit (RRU) | Medical Diagnostic Imaging Power |
|
Use Scenario: Providing clean 12V bias for RF amplifiers and ADCs in outdoor base station equipment operating from -40°C to +85°C. IC Role / Device Role / Timing Role: Precision-regulated buck controller with ±1.5% VREF and 170°C thermal shutdown for unattended outdoor deployment. Use Value: Ensures signal integrity via low-noise SGND routing and 25μs PG delay; VCC2 option improves efficiency when powered from intermediate 12V rail. |
Use Scenario: Generating stable 3.3V/5V supplies for FPGA-based image processing boards in MRI and CT scanner subsystems. IC Role / Device Role / Timing Role: Safety-critical power controller with dual OVP/OCP, hiccup-mode fault recovery, and traceable RoHS-compliant packaging. Use Value: Prevents catastrophic failure during load faults; soft-start and pre-bias start-up avoid inrush-induced voltage droop on sensitive analog front-ends. |
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, but only 500kHz max frequency; no AAM mode; uses external Vref (±0.5%) instead of integrated 0.8V. | Lacks light-load efficiency optimization; better suited for ultra-high-input industrial HVDC systems than automotive cold-crank. | Select LM5116 if input exceeds 60V or if external Vref flexibility outweighs AAM benefits. |
| ISL8113IRZ-T7A | Supports 4.5–60V input and 100–1000kHz sync, but requires external gate drivers; no integrated VCC2 option or pre-bias start-up. | Higher BOM count and layout complexity; lacks VCC2 efficiency boost and seamless pre-bias handling. | Choose ISL8113 only when dual-phase interleaving with external drivers is mandatory and cost is secondary. |
Compared with LM5116PWPR and ISL8113IRZ-T7A, MP2908AGL-P uniquely combines AAM-enabled light-load efficiency, VCC2-powered efficiency optimization, and pre-bias start-up-all in a single QFN-20 package-making it optimal for space-constrained automotive and industrial converters requiring wide VIN and high reliability.
Availability
MP2908AGL-P is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC power supplies, telecom remote radio units, and medical diagnostic imaging systems requiring stable component supply across extended temperature and voltage ranges.
Supply support for MP2908AGL-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 core expertise in DC/DC conversion, motor drivers, and LED lighting controllers.
The MP2908A product line targets high-voltage, high-reliability DC/DC controller applications in automotive, industrial, and telecom infrastructure-designed specifically for wide-input, synchronous buck topologies with integrated gate drivers and comprehensive protection.
FAQ
What is the maximum allowable input voltage for MP2908AGL-P?
The absolute maximum input voltage (VIN) is 65V, but the recommended operating range is 4V to 60V. Exceeding 60V risks violating safe operating area limits and may trigger permanent damage even if within absolute max ratings. Input transient suppression is strongly advised for automotive applications where load-dump spikes can exceed 60V.
How does the CCM/AAM pin determine operating mode?
CCM/AAM operates as an active-low control: pulling it to GND (via resistor ensuring VAAM ≥ 480mV) enables Advanced Asynchronous Mode for light-load efficiency; leaving it floating or tying to VCC1 forces Continuous Conduction Mode. The internal IAAM current (600mV/RFREQ) sets VAAM, and COMP crossing VAAM triggers AAM entry/exit.
Can MP2908AGL-P operate with pre-biased outputs?
Yes. When SS voltage is less than FB at startup, the controller inhibits TG and BG gate drive until SS rises above FB, preventing reverse current flow into a pre-charged output. This avoids damaging downstream capacitors or regulators and eliminates need for external reverse-current blocking circuits.
What is the purpose of the VCC2 pin and how should it be used?
VCC2 allows external biasing of the internal VCC1 regulator, bypassing VIN-derived power to reduce dissipation and improve efficiency. When VCC2 > 4.5V, the IC draws bias from VCC2 instead of VIN. It must not exceed 12V and is commonly tied to a clean 5V or 12V intermediate rail generated by the same converter's output stage.
Does MP2908AGL-P support synchronization with external clock sources?
Yes. The EN/SYNC pin accepts external clock signals from 100kHz to 1000kHz, synchronizing the internal oscillator's rising edge to the external clock. Pulse width must exceed 100ns, and the signal must be referenced to SGND. This feature enables EMI reduction in multi-rail systems and precise phase alignment for interleaved configurations.
How is over-current protection implemented and what happens during a short circuit?
OCP uses cycle-by-cycle current limiting based on SENSE+/SENSE− differential voltage. During sustained over-current or short circuit, the device enters hiccup mode: it shuts down, waits for thermal recovery, then restarts. Average short-circuit current is reduced significantly, limiting power dissipation and preventing thermal runaway without requiring external current-sense amplifiers.
What thermal metrics apply to the QFN-20 (3mm×4mm) package?
The QFN-20 package has θJA = 48°C/W and θJC = 10°C/W (measured per JESD51-7 on 4-layer PCB). With 2.6W max continuous power dissipation at TA = 25°C, the junction temperature rise is ~125°C at full load-well below the 170°C shutdown threshold. Use of the exposed thermal pad is mandatory for rated performance.
MP2908AGL-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 20-TFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Type:
- Adjustable
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Number of Outputs:
- 1
- Output Phases:
- -
- Voltage - Supply (Vcc/Vdd):
- 4V ~ 60V
- Frequency - Switching:
- 1MHz
- Duty Cycle (Max):
- 99.5%
- Synchronous Rectifier:
- Yes
- Clock Sync:
- Yes
- Serial Interfaces:
- -
- Control Features:
- Current Limit, Enable, Frequency Control, Phase Control, Power Good, Soft Start
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-QFN (3x4)
MP2908AGL-P FAQ
1.How can I place an order for MP2908AGL-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2908AGL-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 MP2908AGL-P reliable?
The price and inventory of MP2908AGL-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP2908AGL-P is usually 5 days.
3.What payment methods are accepted for MP2908AGL-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2908AGL-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2908AGL-P?
MP2908AGL-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2908AGL-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 MP2908AGL-P?
For technical support, including MP2908AGL-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2908AGL-P requirements.
6.How does Aetrix verify that MP2908AGL-P is sourced from the original manufacturer or authorized distributors?
All MP2908AGL-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 MP2908AGL-P meets industry standards.
7.What is the process for return or replacement of MP2908AGL-P?
All MP2908AGL-P units undergo pre-shipment inspection (PSI). If there is an issue with MP2908AGL-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 MP2908AGL-P part is unused and in its original packaging.
Return procedure for MP2908AGL-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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