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Monolithic Power Systems Inc. MP2454GH-P
- Part No.:
- MP2454GH-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
MP2454GH-P.pdf
- Description:
- IC REG BUCK ADJ 600MA 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,209
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Product details
Overview
MP2454GH-P 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 power-good (PG) signaling, designed for automotive cold-crank and battery-powered systems requiring low quiescent current (60 µA operating, 3.5 µA shutdown).
For engineers reviewing the MP2454GH-P datasheet, MP2454GH-P pinout, MP2454GH-P application, or MP2454GH-P equivalent, key selection criteria include its programmable switching frequency, 0.8 V feedback reference, thermal shutdown (170 °C), soft-start capability, and compatibility with ceramic output capacitors in space-constrained industrial and automotive power rails.
Technical Context
The MP2454GH-P implements peak-current-mode control with slope compensation and cycle-by-cycle current limiting, enabling fast transient response and stable operation across wide load and input voltage ranges. Its oscillator supports external resistor programming (RFREQ) and synchronization to an external clock (350 kHz–2.3 MHz), with frequency foldback during start-up or short-circuit to prevent inductor current runaway.
It integrates a 3.5 V internal regulator powered from VIN, a bootstrap driver for the high-side MOSFET (BST–SW ≥ 2.5 V required for 100% duty cycle), and a precision 0.8 V ±2% feedback reference. The open-drain POK output asserts high when VOUT remains within ±10% of nominal, with programmable delay via external capacitor on POKDL.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.3 V to 36 V - supports automotive battery transients including cold-crank (down to ~3.3 V) and 24 V industrial rails. |
| Output Current | Up to 0.6 A - continuous regulated output with internal MOSFET and thermal shutdown protection. |
| Feedback Voltage | 0.8 V ±2% - enables precise output regulation using standard resistor dividers (e.g., 3.3 V = 95.3 kΩ + 300 kΩ). |
| Switching Frequency | 350 kHz to 2.3 MHz - programmable via RFREQ resistor; supports EMI optimization and compact magnetics. |
| Quiescent Current | 60 µA - enables >10-year battery life in always-on IoT sensors and telematics modules. |
| Shutdown Current | 3.5 µA - ensures minimal leakage during system sleep modes without external disconnect switches. |
| Thermal Shutdown | 170 °C with 25 °C hysteresis - provides fault-tolerant operation under sustained overload or poor PCB thermal design. |
Pinout & Package
MP2454GH-P is housed in an MSOP-10 EP package with exposed thermal pad soldered to GND plane for optimal heat dissipation (θJA = 55 °C/W, θJC = 12 °C/W). Pin numbering follows standard MSOP top-view orientation with Pin 1 at bottom-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SW | Switch node | Drives external inductor; requires low-VF Schottky diode to GND and tight layout to minimize ringing. |
| 2 VIN | Main input supply | Powers internal circuitry and high-side switch; needs local 10 µF ceramic decoupling capacitor. |
| 3 GND | Power ground | Reference for all signals; connect exposed pad directly to solid GND plane for thermal and EMI performance. |
| 4 SS | Soft-start control | Internal 1.8 µA current source charges external capacitor to ramp output voltage and limit inrush. |
| 5 FB | Feedback input | Compares output divider voltage against 0.8 V reference; sets regulated output voltage. |
| 6 POKDL | Power-good delay | Capacitor here programs POK assertion delay (e.g., 10 nF ≈ 12 ms) to avoid false triggers during transients. |
| 7 POK | Open-drain power-good | Signals VOUT stability (±10%); requires external pull-up (≤5 V, e.g., 100 kΩ) to host logic rail. |
| 8 FREQ | Frequency programming | Resistor to GND sets switching frequency (e.g., 49.9 kΩ → 1 MHz); enables EMI tuning. |
| 9 EN/SYNC | Enable/synchronization | Logic-level enable (1 V low / 1.8 V high); doubles as sync input for external clock alignment. |
| 10 BST | Bootstrap supply | Charges external BST capacitor (e.g., 0.1 µF X7R) from SW node; critical for high-duty-cycle operation. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 200 mΩ High-Side MOSFET | Eliminates external switch and gate driver, reducing BOM count and layout complexity in 0.6 A applications. |
| Programmable Power-Good Delay | Enables precise sequencing in multi-rail systems by delaying POK assertion until output settles post-startup. |
| Low Dropout Operation (100% Duty Cycle) | Maintains regulation down to VIN ≈ VOUT + dropout losses, supporting automotive cold-crank (e.g., 4.5 V → 3.3 V). |
| Frequency Foldback Protection | Reduces switching frequency during overloads or short circuits, preventing inductor saturation and thermal runaway. |
| Stable with Ceramic Output Capacitors | Removes need for high-ESR electrolytics, enabling smaller, more reliable, and lower-noise output filtering. |
Applications
| Automotive Infotainment Power Supply | Industrial Sensor Node Regulator |
|---|---|
Use Scenario: Powers display controller, audio codec, and CAN interface in vehicle head units under 12 V battery with cold-crank dips to 3.5 V. IC Role / Device Role / Timing Role: Primary 3.3 V buck converter supplying core logic; handles wide VIN transients and provides POK for MCU reset coordination. Use Value: 3.5 µA shutdown current extends backup battery life; 100% duty cycle maintains VOUT during cranking; POK enables safe firmware boot sequencing. |
Use Scenario: Supplies 5 V or 3.3 V to ultra-low-power wireless sensor nodes (LoRaWAN, NB-IoT) operating from primary lithium thionyl chloride cells. IC Role / Device Role / Timing Role: Main system regulator with deep-sleep mode support; synchronized soft-start avoids brownout during wake-up bursts. Use Value: 60 µA quiescent current enables >12-year field lifetime; ceramic-capable design improves long-term reliability vs. electrolytic aging. |
| Distributed Telecom Power Module | Factory Automation I/O Module |
Use Scenario: Generates isolated 5 V auxiliary rail from 24 V or 48 V backplane in modular telecom equipment with strict EMI limits. IC Role / Device Role / Timing Role: Pre-regulator feeding isolated DC/DC; frequency programmability allows EMI notch placement around sensitive bands. Use Value: 2.3 MHz max switching enables <10 µH inductors and compact footprint; internal compensation reduces layout sensitivity. |
Use Scenario: Powers digital isolators, ADCs, and microcontrollers in DIN-rail mounted PLC I/O modules exposed to 36 V industrial bus surges. IC Role / Device Role / Timing Role: Robust front-end buck stage with UVLO hysteresis (2.65 V–2.9 V) and thermal shutdown for unattended operation. Use Value: 36 V absolute max rating withstands IEC 61000-4-5 surge events; MSOP-10 EP package supports conformal coating and high-voltage creepage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2451DJ-LF-Z | Lower 0.5 A current rating; fixed 500 kHz frequency; no POK or POKDL pins; QFN-8 package. | Lacks power-good signaling and frequency programmability; suitable only for cost-sensitive, fixed-frequency, lower-current designs. | Select only if POK, soft-start delay, and >0.5 A load are unnecessary - sacrifices flexibility for lower unit cost. |
| LM5164QDDARQ1 | Automotive-grade (AEC-Q100), 1 A output, 4.5–65 V input, integrated high- and low-side MOSFETs (synchronous). | Higher current, wider VIN, synchronous rectification; requires external compensation and lacks integrated soft-start current source. | Choose for AEC-Q100 compliance, higher efficiency above 0.3 A, or >36 V input - adds complexity but improves thermal margin. |
Compared with MP2454GH-P, MP2451DJ-LF-Z trades programmability and monitoring for cost reduction, while LM5164QDDARQ1 upgrades to automotive qualification and synchronous operation at the expense of design simplicity and component count.
Availability
MP2454GH-P is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial sensor nodes, and factory automation I/O modules requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for MP2454GH-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 MP2454 belongs to MPS's high-voltage buck converter product line, engineered for robustness in automotive, industrial, and battery-powered applications where wide input range, low IQ, and thermal resilience are critical.
FAQ
What is the minimum recommended input voltage for reliable startup?
The MP2454GH-P has a VIN UVLO rising threshold of 2.9 V, but stable startup requires ≥3.3 V to ensure sufficient headroom for BST capacitor charging and internal regulator operation. Below 3.3 V, the device may not initiate switching or sustain regulation during cold-crank conditions.
Can MP2454GH-P operate without an external bootstrap diode?
Yes - the MP2454GH-P uses an internal bootstrap regulator that charges the BST capacitor through VIN during SW low periods. An external Schottky diode is optional and recommended only for >65% duty cycle or >2 MHz operation to improve light-load efficiency and BST voltage stability.
How is the soft-start time calculated for a given capacitor value?
Soft-start time is determined by tSS = (CSS × 0.8 V) / ISS, where ISS = 1.8 µA (typical). For example, a 100 nF capacitor yields tSS ≈ 44 ms. This linear ramp prevents output overshoot and controls inrush into downstream capacitance.
Does MP2454GH-P support forced PWM mode, or is pulse-skipping automatic?
The MP2454GH-P operates exclusively in current-mode PWM at medium-to-heavy loads and automatically enters pulse-skipping mode at light loads to reduce quiescent current. There is no user-controllable forced PWM mode - efficiency optimization is fully internal and transparent.
What is the maximum allowable RFREQ resistor value, and what happens beyond it?
The maximum recommended RFREQ is 150 kΩ (for ~350 kHz). Values >150 kΩ cause oscillator instability and unpredictable frequency drift. At extremes, the device may fail to start or exhibit erratic switching due to insufficient bias current into the oscillator comparator.
Is the exposed thermal pad electrically isolated in the MSOP-10 EP package?
No - the exposed pad is internally connected to GND and must be soldered to a dedicated GND copper pour on the PCB. It serves both thermal conduction and electrical grounding; floating or connecting it to another net will impair thermal performance and may cause malfunction.
How does the POK signal behave during thermal shutdown?
During thermal shutdown, the MP2454GH-P disables switching and pulls POK low immediately (within microseconds) to indicate loss of regulation. POK remains low until junction temperature falls below 145 °C (25 °C hysteresis), at which point normal operation and POK assertion resume.
MP2454GH-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- MP
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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):
- 0.8V
- Voltage - Output (Max):
- 36V
- Current - Output:
- 600mA
- Frequency - Switching:
- 350kHz ~ 2.3MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP-EP
MP2454GH-P FAQ
1.How can I place an order for MP2454GH-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2454GH-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 MP2454GH-P reliable?
The price and inventory of MP2454GH-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP2454GH-P is usually 5 days.
3.What payment methods are accepted for MP2454GH-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2454GH-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2454GH-P?
MP2454GH-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2454GH-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 MP2454GH-P?
For technical support, including MP2454GH-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2454GH-P requirements.
6.How does Aetrix verify that MP2454GH-P is sourced from the original manufacturer or authorized distributors?
All MP2454GH-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 MP2454GH-P meets industry standards.
7.What is the process for return or replacement of MP2454GH-P?
All MP2454GH-P units undergo pre-shipment inspection (PSI). If there is an issue with MP2454GH-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 MP2454GH-P part is unused and in its original packaging.
Return procedure for MP2454GH-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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