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Monolithic Power Systems Inc. MP2454GH
- Part No.:
- MP2454GH
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
MP2454GH.pdf
- Description:
- IC REG BUCK ADJ 600MA 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,556
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Product details
Overview
MP2454GH from Monolithic Power Systems is a frequency-programmable (350 kHz to 2.3 MHz), non-synchronous step-down DC/DC converter with integrated 200 mΩ high-side MOSFET, delivering up to 0.6 A output current across a 3.3 V to 36 V input range. It features current-mode control, internal compensation, and a 3.5 µA shutdown quiescent current-enabling use in automotive cold-crank and battery-powered systems.
For engineers reviewing the MP2454GH datasheet, MP2454GH pinout, MP2454GH application, or MP2454GH equivalent, key selection considerations include its programmable switching frequency, low-dropout operation at 100% duty cycle, open-drain power-good (POK) signal with programmable delay, and thermal shutdown at 170°C.
Technical Context
The MP2454GH implements peak-current-mode PWM control with slope compensation and cycle-by-cycle current limiting, enabling fast transient response and stable regulation under wide load and input variations. Its internal 3.5 V regulator powers all control circuitry across the full 3.3–36 V VIN range, while the bootstrap driver sustains gate drive for the high-side MOSFET using an external BST–SW capacitor.
In light-load conditions, it enters pulse-skipping mode-reducing switching frequency down to ~20% of nominal-to minimize gate-drive and switching losses, achieving >90% efficiency at 0.1 A and maintaining 60 µA operating quiescent current. Frequency foldback (down to 1/5th nominal) prevents inductor current runaway during start-up or short-circuit events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input voltage range | 3.3 V to 36 V - supports automotive battery transients including cold-crank (4.5 V min) and load-dump (up to 36 V). |
| Output current | 0.6 A continuous - limited by internal MOSFET RDS(on) (200 mΩ typ) and thermal design in MSOP-10 EP package (θJA = 55°C/W). |
| Switching frequency | 350 kHz to 2.3 MHz (programmable via FREQ pin resistor) - enables compact magnetics and EMI optimization. |
| Feedback reference | 0.8 V ±2% - sets output voltage accuracy; used with external resistor divider (e.g., 300 kΩ/95.3 kΩ for 3.3 V). |
| Quiescent current | 60 µA (operating), 3.5 µA (shutdown) - enables always-on subsystems in battery-powered applications. |
| Power good threshold | ±10% of nominal VOUT - POK asserts high only when regulated output remains within tight window; delay programmable via POKDL capacitor. |
| Thermal shutdown | 170°C activation / 145°C hysteresis - provides fault-tolerant protection without latch-off; recovers autonomously after cooling. |
Pinout & Package
MP2454GH is housed in an MSOP-10 EP (exposed pad) package optimized for thermal performance in space-constrained automotive and industrial PCBs. The exposed pad must be soldered to a dedicated GND plane for effective heat dissipation (θJC = 12°C/W).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 SW | Switch node | Drives external inductor; requires low-VF Schottky diode to GND near pin to suppress ringing. |
| 2 VIN | Main input supply | Powers internal regulators and high-side switch; requires local ceramic decoupling (e.g., 1 µF X7R + 10 µF tantalum). |
| 3 GND | Power ground | Reference for all analog and power circuits; connects directly to exposed pad for lowest impedance return path. |
| 4 SS | Soft-start control | Internal 1.8 µA current source charges external capacitor to ramp VOUT linearly and limit inrush current. |
| 5 FB | Feedback input | Senses output voltage via resistor divider; 0.8 V reference enables precise VOUT setting (e.g., 5 V, 3.3 V, 2.5 V). |
| 6 POKDL | POK delay programming | Capacitor here sets glitch-free POK assertion delay (e.g., 1 nF ≈ 1.3 ms); avoids false POK during startup. |
| 7 POK | Open-drain power-good | Signals VOUT stability; requires external pull-up (≤5 V, e.g., 100 kΩ) to host logic rail. |
| 8 FREQ | Frequency programming | Resistor to GND sets fSW: 49.9 kΩ → 1 MHz, 17.4 kΩ → 2.3 MHz (per datasheet Table 1). |
| 9 EN/SYNC | Enable & sync input | Logic-low (<1 V) disables IC; logic-high (>1.8 V) enables; external clock (350 kHz–2.3 MHz) synchronizes switching. |
| 10 BST | Bootstrap supply | Charges external BST–SW capacitor (~0.1 µF ceramic) to ~5 V; critical for sustaining high-side gate drive above SW. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 200 mΩ high-side MOSFET | Eliminates external switch and driver, reducing BOM count and layout complexity in 0.6 A buck designs. |
| Programmable POK delay (via POKDL) | Enables precise sequencing in multi-rail systems-delays POK assertion until output settles, avoiding false system resets. |
| Low-dropout 100% duty-cycle mode | Maintains regulation down to VIN − VOUT ≈ 0.5 V (with sufficient BST headroom), supporting automotive cold-crank (4.5 V IN @ 3.3 V OUT). |
| Frequency foldback during fault | Reduces fSW to ~20% nominal during start-up or short-circuit, preventing inductor saturation and current runaway. |
| Internal compensation | Removes need for external Type-II/III compensation network-simplifies design and improves production consistency. |
| 3.5 µA shutdown current | Enables ultra-low-power standby in always-on modules (e.g., CAN wake-up receivers, telematics backup rails). |
Applications
| Automotive Infotainment Power | Industrial Sensor Node Supply |
|---|---|
|
Use Scenario: Powers 3.3 V microcontroller, CAN transceiver, and display backlight in head-unit under 12 V battery with cold-crank dips to 4.5 V. IC Role / Device Role / Timing Role: Primary 0.6 A buck regulator providing stable 3.3 V rail; uses low-dropout mode and POK to validate rail before MCU boot. Use Value: Maintains regulation during 4.5 V cold-crank events and delivers >90% efficiency at 100 mA sleep current-extending battery reserve time. |
Use Scenario: Supplies 5 V to low-power wireless sensor (LoRaWAN/NB-IoT) in remote industrial monitoring cabinet with 24 V DC input. IC Role / Device Role / Timing Role: High-voltage input buck converter enabling direct 24 V-to-5 V conversion; synchronized to system clock via EN/SYNC pin. Use Value: Eliminates pre-regulator stage, reduces board area by 35%, and achieves 60 µA quiescent current-enabling 10-year battery life. |
| Automotive ADAS Camera Module | Portable Medical Diagnostic Device |
|
Use Scenario: Generates clean 1.8 V core supply for image signal processor (ISP) in rear-view camera, operating from vehicle 12 V bus with EMI constraints. IC Role / Device Role / Timing Role: High-frequency (2 MHz) buck converter minimizing inductor size; uses ceramic output caps and internal compensation for low noise. Use Value: Achieves <15 mVpp output ripple at 200 mA load and passes CISPR-25 Class 5 conducted EMI-no additional filtering required. |
Use Scenario: Provides isolated 3.3 V rail for patient-connected analog front-end (AFE) and Bluetooth LE radio in handheld ECG device powered by Li-ion battery. IC Role / Device Role / Timing Role: Battery-efficient buck regulator with 3.5 µA shutdown and soft-start-prevents voltage overshoot during button-press wake-up. Use Value: Extends single-charge runtime by 22% vs. legacy 100 µA-Q buck; POK confirms rail stability before AFE initialization sequence begins. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61480RQWR | Higher 8 A rating, synchronous rectification, fixed 500 kHz fSW, no POK delay programming. | Targets higher-power ADAS ECUs; lacks programmable POK timing needed for sequenced multi-rail systems. | Select if >1 A output or synchronous efficiency is required; avoid if POK delay or cold-crank dropout is critical. |
| TPS54340DDAR | 3.5–42 V input, 3.5 A, adjustable fSW (100 kHz–2.5 MHz), but 120 µA QSS and no integrated POK. | Suitable for industrial 24 V systems needing higher current; requires external POK comparator and timing RC. | Choose for wider input range and higher current; MP2454GH preferred where ultra-low QSS, POK integration, and footprint matter. |
Compared with LM61480RQWR and TPS54340DDAR, MP2454GH offers superior cold-crank capability (100% duty cycle), lower shutdown current (3.5 µA), and built-in programmable POK-making it optimal for space- and power-constrained automotive and portable applications below 0.6 A.
Availability
MP2454GH is available at Aetrix Electronics and suitable for automotive infotainment, industrial sensor nodes, and portable medical diagnostics requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for MP2454GH 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 over two decades of leadership in DC/DC conversion, motor drivers, and LED lighting controllers.
The MP2454GH belongs to MPS's automotive-grade step-down converter product line, designed specifically for harsh-environment applications demanding wide VIN, low IQ, and robust fault protection-including cold-crank, load-dump, and thermal stress.
FAQ
What is the minimum input voltage required for MP2454GH to regulate a 3.3 V output?
The MP2454GH supports dropout operation down to ~0.5 V differential (VIN − VOUT) when BST–SW voltage remains ≥2.5 V. For 3.3 V output, regulation is maintained down to approximately 3.8 V input-enabling reliable operation during automotive cold-crank events where battery voltage drops to 4.5 V or lower.
Can MP2454GH synchronize to an external clock while in shutdown?
No. Synchronization is only active when EN/SYNC is pulled above 1.8 V and the device is enabled. During shutdown (EN < 1 V), the oscillator and all control circuitry-including sync detection-are disabled. External clock signals applied during shutdown have no effect and do not wake the device.
How does the MP2454GH achieve >90% efficiency at light loads?
It enters pulse-skipping mode, dynamically scaling switching frequency downward (as low as ~70 kHz at 10 mA load) to reduce gate-drive and switching losses. Combined with 60 µA quiescent current and zero-crossing detection, this preserves high efficiency across 0.1–0.6 A load range without requiring external bias supplies.
Is an external bootstrap diode required for MP2454GH?
Not mandatory-but recommended for high-duty-cycle (>65%) or high-frequency (>2 MHz) operation. An external Schottky diode (e.g., PMEG4005AEJ) from VIN to BST improves BST capacitor recharge efficiency, especially during light load when the internal BST regulator shuts off, preventing UVLO-induced dropout.
What is the maximum recommended output capacitance for MP2454GH?
No absolute maximum is specified, but stability and startup behavior must be verified. Ceramic capacitors up to 100 µF per rail are commonly used. For >47 µF total COUT, increase soft-start capacitor value proportionally to prevent FB overvoltage during ramp-up and ensure monotonic VOUT rise.
Does MP2454GH support output voltages below 0.8 V?
No. The internal feedback reference is fixed at 0.8 V ±2%. Output voltage is set by the resistor divider ratio: VOUT = 0.8 V × (1 + R1/R2). Therefore, the lowest achievable regulated output is 0.8 V (with R2 = ∞, i.e., FB tied directly to VOUT), and practical minimums are ~1.0 V due to divider tolerance and noise margin.
How is thermal performance affected by the MSOP-10 EP exposed pad connection?
Thermal resistance θJA drops from ~95°C/W (no pad connection) to 55°C/W (with 200 mm² 2-oz copper pour connected to exposed pad). Omitting the pad connection risks junction temperature exceeding 125°C at 0.6 A load in still air-triggering thermal shutdown. Full soldering of the pad to inner-layer GND planes is mandatory for rated performance.
MP2454GH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.3V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- 600mA
- Frequency - Switching:
- 2.3MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP-EP
MP2454GH FAQ
1.How can I place an order for MP2454GH through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2454GH 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 MP2454GH reliable?
The price and inventory of MP2454GH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP2454GH is usually 5 days.
3.What payment methods are accepted for MP2454GH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2454GH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2454GH?
MP2454GH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2454GH 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 MP2454GH?
For technical support, including MP2454GH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2454GH requirements.
6.How does Aetrix verify that MP2454GH is sourced from the original manufacturer or authorized distributors?
All MP2454GH 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 MP2454GH meets industry standards.
7.What is the process for return or replacement of MP2454GH?
All MP2454GH units undergo pre-shipment inspection (PSI). If there is an issue with MP2454GH, 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 MP2454GH part is unused and in its original packaging.
Return procedure for MP2454GH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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