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Monolithic Power Systems Inc. MP2908AGL-Z
- Part No.:
- MP2908AGL-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 20-TFQFN Exposed Pad
- Datasheet:
-
MP2908AGL-Z.pdf
- Description:
- IC REG BUCK ADJUSTABLE
- Quantity:
- Payment:
- Shipping:
Inventory:3,981
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Product details
Overview
MP2908AGL-Z 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 programmable 100–1000kHz switching frequency, and features precision over-voltage (110–120% VFB) and cycle-by-cycle current limiting-enabling robust 5V/12V automotive power rails.
For engineers reviewing the MP2908AGL-Z datasheet, MP2908AGL-Z pinout, MP2908AGL-Z application, or MP2908AGL-Z equivalent, key selection criteria include its dual-MOSFET gate drive capability, AAM/CCM mode selectability, 99.5% max duty cycle for cold-crank operation, and QFN-20 (3mm×4mm) thermal performance with θJA = 48°C/W.
Technical Context
The MP2908AGL-Z implements peak-current-mode control with slope compensation, using FB voltage comparison against an internal 0.8V reference to generate COMP error voltage that modulates PWM duty cycle. Its dual-gate drivers (TG/BG) support independent dead-time control (60ns) and bootstrap-based high-side drive via BST–SW capacitor.
It integrates three operating modes: forced CCM (CCM/AAM tied to VCC1), light-load AAM (CCM/AAM pulled low), and hiccup-mode OCP recovery. Protection includes 170°C thermal shutdown with 20°C hysteresis, output OVP with discharge-mode response, and reverse-current limit sensing at SENSE+/–.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 60V - supports automotive battery transients including cold-crank (4.5V UVLO rising) |
| Reference Voltage | 0.800V ±1.5% - enables precise output regulation across –40°C to +125°C junction temp |
| Max Duty Cycle | 99.5% - sustains regulation during ultra-low VIN conditions without dropout |
| Switching Frequency | 100kHz–1000kHz programmable via FREQ resistor or external sync clock - reduces EMI in noise-sensitive systems |
| Current Limit Threshold | 25mV / 50mV / 75mV selectable via ILIM pin - sets peak inductor current for 5A–25A output designs |
| Power Good Accuracy | ±10% VOUT window with 25μs delay - provides reliable system power sequencing signal |
| Thermal Shutdown | 170°C with 20°C hysteresis - prevents permanent damage during sustained overload or poor heatsinking |
Pinout & Package
MP2908AGL-Z is housed in a thermally enhanced QFN-20 package (3mm × 4mm, 0.5mm pitch) with exposed thermal pad (EP) for PCB-level heat dissipation (θJA = 48°C/W on 4-layer board).
| 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 spikes |
| 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 input | Enables VCC1 regulation from external source (4.5–12V), reducing VIN power loss and improving efficiency |
| VCC1 (Pin 4) | Internal bias rail output | 5V regulated output powering gate drivers and analog circuitry; requires 1–4.7μF ceramic decoupling |
| SGND (Pin 5) | Signal ground reference | Low-noise return for FB, COMP, SS; must be routed separately from PGND to avoid noise coupling |
| SS (Pin 6) | Soft-start timing control | Charged by 4μA internal current; external capacitor sets ramp time to prevent output overshoot |
| COMP (Pin 7) | Error amplifier output | Connect RC network to SGND to stabilize loop; transconductance = 500μS, DC gain = 70dB |
| FB (Pin 8) | Output voltage feedback input | Compares divider output to 0.8V reference; 10nA input bias enables high-resistance dividers |
| CCM/AAM (Pin 9) | Operating mode select | Float/VCC1 = CCM; GND via resistor = AAM - enables >90% light-load efficiency at <100mA |
| FREQ (Pin 10) | Frequency programming node | Resistor to SGND sets fSW; 65kΩ yields 300kHz typical; supports sync override |
| PG (Pin 11) | Open-drain power-good indicator | Pulled low when VOUT deviates >±10%; requires external pull-up (e.g., 100kΩ to ≤5V) |
| ILIM (Pin 12) | Current limit threshold select | GND = 25mV, VCC1 = 50mV, float = 75mV - defines peak inductor current limit |
| SYNCO (Pin 13) | 180° out-of-phase clock output | Enables interleaved dual-phase operation when cascading two MP2908A controllers |
| SENSE– (Pin 14) | Negative current sense input | Paired with SENSE+ to measure differential voltage across shunt; common-mode range = 0–24V |
| SENSE+ (Pin 15) | Positive current sense input | Together with SENSE–, enables accurate valley/peak current sensing for OCP and hiccup recovery |
| PGND (Pin 16) | Power ground return | High-current return for BG driver and VCC1 regulator; must connect directly to VCC1 capacitor negative |
| BG (Pin 17) | Bottom gate driver output | Drives synchronous N-MOSFET source; 1Ω pull-down ensures fast turn-off and shoot-through prevention |
| SW (Pin 18) | Switch node | High dv/dt node connecting external HS/LS MOSFETs; reference for BST capacitor and bootstrap charging |
| TG (Pin 19) | Top gate driver output | Bootstrapped floating driver for HS N-MOSFET; 2Ω pull-up / 1Ω pull-down supports <100ns transitions |
| BST (Pin 20) | Bootstrap supply input | Charged via diode from VCC1 to SW; UVLO (3.05V) protects HS-FET drive during low-BST conditions |
Key Features
| Feature | Design Value |
|---|---|
| Advanced Asynchronous Mode (AAM) | Reduces light-load quiescent current to 250–350μA and enables >90% efficiency at 10mA output |
| Dual N-MOSFET Gate Drivers | TG/BG drivers with 2Ω/1Ω pull-up/down resistors and 60ns dead time ensure robust, shoot-through-free switching |
| Programmable Current Limit | Three fixed thresholds (25/50/75mV) selected via ILIM pin simplify design of 5–25A output stages |
| Pre-bias Safe Start-Up | Blocks TG/BG activation until SS > FB, preventing reverse current flow into pre-biased outputs |
| Output Over-Voltage Protection | Discharge-mode response (HS off, LS on) clamps VOUT within 100ns when FB exceeds 110% VFB |
| Thermal & Electrical Fault Recovery | Hiccup-mode OCP and auto-restart after thermal shutdown ensure self-protection without manual reset |
Applications
| Automotive Infotainment Power Supply | Industrial PLC I/O Module |
|---|---|
|
Use Scenario: Powers 5V/3.3V rails for head-unit processors, display drivers, and CAN transceivers under 6V–16V battery input with cold-crank dips to 4.5V. IC Role / Device Role / Timing Role: Primary synchronous buck controller regulating main system voltage; handles transient load steps up to 5A with <50μs response. Use Value: 99.5% max duty cycle maintains regulation during cranking; AAM extends standby runtime in always-on modules. |
Use Scenario: Generates isolated 12V/5V supplies for analog sensor front-ends and digital logic in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: High-voltage step-down controller interfacing with 24V/48V industrial bus; drives discrete MOSFETs for scalable 10A output. Use Value: 60V absolute max input withstands 48V bus surges; OVP/OCP/thermal protection meets IEC 61000-4-5 surge immunity requirements. |
| Telecom Remote Radio Unit (RRU) | EV On-Board Charger Auxiliary Supply |
|
Use Scenario: Provides stable 12V bias for RF power amplifiers and FPGA configuration in outdoor macro-cell base stations with wide ambient temperature range. IC Role / Device Role / Timing Role: Primary DC/DC controller in multi-phase 48V-to-12V converter; synchronized via SYNCO to reduce input ripple. Use Value: External sync capability eliminates beat frequencies; QFN-20 EP package enables compact thermal design in sealed enclosures. |
Use Scenario: Supplies 12V control power to gate drivers, MCU, and isolation interfaces in bi-directional OBCs operating from 200–450V DC link. IC Role / Device Role / Timing Role: High-input-voltage buck controller stepping down from auxiliary winding or DC-link-derived supply; supports 100kHz–1MHz operation. Use Value: 60V rated input avoids need for intermediate pre-regulator; CCM/AAM pin allows seamless transition between full-load and standby modes. |
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 | 4.5–100V input, 100kHz–1MHz freq, no integrated AAM; uses external VREF and requires more compensation components | Lacks programmable light-load mode; less suitable for battery-backed or always-on systems requiring <1mA quiescent current | Choose LM5116 for ultra-high input (>80V) or when external reference flexibility outweighs AAM efficiency gains |
| TPS40200PWP | 4.5–60V input, fixed 300kHz, no sync, no AAM, lower integration (no PG, no OVP, no thermal shutdown) | Requires external OVP, thermal monitor, and PG circuitry; higher BOM count and reduced fault coverage | Choose TPS40200 only for cost-sensitive, non-safety-critical applications where full protection is implemented externally |
Compared with LM5116PWPR and TPS40200PWP, MP2908AGL-Z offers superior light-load efficiency via AAM, integrated OVP/thermal/OC protection, and a complete feature set in a single QFN-20 package-reducing design risk and validation effort for automotive and industrial 4–60V systems.
Availability
MP2908AGL-Z is available at Aetrix Electronics and suitable for automotive infotainment, industrial PLC power supplies, and telecom remote radio units requiring stable component supply across extended temperature and voltage ranges.
Supply support for MP2908AGL-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 core expertise in DC/DC conversion, motor drivers, and LED lighting solutions.
The MP2908A belongs to MPS's high-voltage synchronous controller product line, designed specifically for rugged 4–60V automotive and industrial power conversion where reliability, efficiency across load range, and comprehensive protection are critical.
FAQ
What is the maximum supported input voltage for MP2908AGL-Z?
The MP2908AGL-Z has an absolute maximum input voltage rating of 65V, with guaranteed operation from 4V to 60V. Its 4.5V UVLO rising threshold and 3.7V falling threshold ensure clean start-up and shutdown during automotive battery transients, including cold-crank events down to 4.5V.
How does the AAM mode improve light-load efficiency?
AAM mode disables PWM switching when inductor current approaches zero, entering burst-mode operation with only essential bias currents active. This reduces total input current to 250–350μA and achieves >90% efficiency at 10mA load-critical for always-on automotive modules and industrial sensors.
Can MP2908AGL-Z drive external MOSFETs with different RDS(on) values?
Yes-the TG and BG drivers deliver 2A peak source/sink current with low on-resistance (2Ω/1Ω), supporting N-MOSFETs with RDS(on) from 2mΩ to 50mΩ. Dead time is fixed at 60ns, so layout and gate resistor selection must prevent shoot-through in high-current designs.
What is the purpose of the SYNCO pin?
SYNCO outputs a 180° phase-shifted clock signal synchronized to the internal oscillator. When used with a second MP2908A, it enables interleaved dual-phase operation-halving input/output ripple current and easing EMI filter design in high-power 48V-to-12V converters.
How is over-voltage protection triggered and cleared?
OVP triggers when FB exceeds 110–120% of 0.8V (0.88–0.96V). The controller enters discharge mode: TG turns off, BG turns on to sink current, and remains active until reverse current limit is reached. OVP clears automatically once FB falls below the hysteresis threshold (10% VFB).
Is the MP2908AGL-Z RoHS-compliant and lead-free?
Yes-MP2908AGL-Z is fully RoHS-compliant, lead-free, and halogen-free per MPS quality assurance standards. The QFN-20 package uses matte tin (Sn) termination and is qualified for reflow soldering per JEDEC J-STD-020 moisture sensitivity level 3 (MSL3).
What thermal derating applies to the QFN-20 package?
With θJA = 48°C/W on a standard 4-layer PCB (JESD51-7), the QFN-20 package dissipates 2.6W continuously at 25°C ambient. At 85°C ambient, maximum allowable power drops to ~1.3W. Use of the exposed thermal pad with ≥4 thermal vias is mandatory for full-rated performance.
MP2908AGL-Z 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-Z FAQ
1.How can I place an order for MP2908AGL-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2908AGL-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 MP2908AGL-Z reliable?
The price and inventory of MP2908AGL-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP2908AGL-Z is usually 5 days.
3.What payment methods are accepted for MP2908AGL-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2908AGL-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2908AGL-Z?
MP2908AGL-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2908AGL-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 MP2908AGL-Z?
For technical support, including MP2908AGL-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2908AGL-Z requirements.
6.How does Aetrix verify that MP2908AGL-Z is sourced from the original manufacturer or authorized distributors?
All MP2908AGL-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 MP2908AGL-Z meets industry standards.
7.What is the process for return or replacement of MP2908AGL-Z?
All MP2908AGL-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP2908AGL-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 MP2908AGL-Z part is unused and in its original packaging.
Return procedure for MP2908AGL-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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