My Inquiry
My Account
Monolithic Power Systems Inc. MP2456GJ-Z
- Part No.:
- MP2456GJ-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
MP2456GJ-Z.pdf
- Description:
- IC REG BUCK ADJ 500MA TSOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:12,987
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MP2456GJ-Z from Monolithic Power Systems is a monolithic 0.5A, 50V, 1.2MHz current-mode step-down DC/DC converter with integrated 1Ω power MOSFET, fixed-frequency operation, and cycle-by-cycle over-current protection. It operates from 4.5V–50V input, delivers adjustable output (0.81V to 0.9×VIN), and targets space-constrained industrial power rails such as battery chargers and pre-regulators.
For engineers reviewing the MP2456GJ-Z datasheet, MP2456GJ-Z pinout, MP2456GJ-Z application, or MP2456GJ-Z equivalent, key selection criteria include its wide 4.5–50V input range, TSOT23-6 footprint compatibility, thermal shutdown behavior at 165°C, and stable regulation with low-ESR ceramic output capacitors.
Technical Context
The MP2456GJ-Z implements peak-current-mode control with internal ramp compensation for loop stability across line and load transients. Its error amplifier compares FB voltage against a precise 0.812V bandgap reference and drives PWM duty cycle via a 1.2MHz oscillator with 89% maximum duty cycle.
Protection logic includes cycle-by-cycle current limiting triggered at 1.25A typical, thermal shutdown at 165°C with 20°C hysteresis, and under-voltage lockout with 3.3V rising threshold and 250mV hysteresis. Startup uses 0.6ms internal soft-start to limit inrush into large output capacitors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 50V - supports direct connection to 12V/24V/48V industrial buses without pre-regulation |
| Output Voltage Range | 0.81V to 0.9×VIN - enables flexible regulation including 3.3V, 5V, and 12V outputs using external resistor divider |
| Switching Frequency | Fixed 1.2MHz ±20% - allows compact magnetics and reduces EMI filter size vs lower-frequency buck converters |
| Peak Output Current | 0.5A - defines maximum continuous load capability before current-limit foldback activation |
| Internal MOSFET RDS(ON) | 1Ω - sets conduction loss budget and thermal dissipation in high-duty-cycle operation |
| Feedback Reference Voltage | 0.812V ±2.5% - determines output accuracy and sets minimum resolvable output voltage step |
| Shutdown Quiescent Current | 0.1μA - enables ultra-low-power system sleep states without significant battery drain |
Pinout & Package
MP2456GJ-Z is housed in a thermally enhanced TSOT23-6 package with exposed pad (not electrically connected), optimized for PCB copper area heat spreading. Pin 1 is bottom-left when viewing top marking left-to-right.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST | Bootstrap supply | Connects 0.1µF–1µF capacitor between BST and SW to generate gate drive voltage > VIN for high-side MOSFET |
| GND | Analog & power ground | Reference node for feedback and internal circuitry; requires dedicated low-impedance return path separate from high-current SW/GND paths |
| FB | Voltage feedback input | Senses output via resistor divider; internal 0.812V reference sets regulation point; <250mV triggers frequency foldback during short-circuit |
| EN | Enable control | Active-high logic input; 1.35V threshold turns device on; 100μA max sink current limits pull-up resistor sizing |
| IN | Main power input | Accepts 4.5–50V unregulated supply; requires local 4.7µF ceramic decoupling to suppress switching noise |
| SW | Power switch node | Drives external Schottky diode and inductor; high dv/dt node requiring tight layout to minimize EMI and ringing |
Key Features
| Feature | Design Value |
|---|---|
| Current-mode control architecture | Enables fast transient response to load steps and simplifies compensation design with single-pole dominant pole |
| Stable with ceramic output capacitors | Eliminates need for electrolytic or tantalum caps; supports X5R/X7R MLCCs down to 22µF for full stability margin |
| 0.6ms internal soft-start | Prevents output overshoot during startup and avoids current-limit activation when charging large output capacitance |
| Thermal shutdown with hysteresis | Shuts down at 165°C junction temperature and re-enables only after cooling by 20°C, preventing thermal oscillation |
| Wide input voltage range | Supports direct integration into 48V telecom, 36V automotive, and 24V industrial systems without intermediate conversion |
Applications
| Power Meters | Distributed Power Systems |
|---|---|
Use Scenario: Metering ICs and RF modules in smart electricity meters require isolated 3.3V/5V rails from 12–48V PLC or battery inputs. IC Role / Device Role / Timing Role: Primary non-isolated buck regulator providing clean, regulated supply to metrology and communication subsystems. Use Value: 50V absolute max rating tolerates surges on utility lines; 1.2MHz switching minimizes filter component size in sealed meter enclosures. | Use Scenario: Point-of-load conversion in modular server PSUs or telecom shelf management boards where multiple voltage domains coexist. IC Role / Device Role / Timing Role: Secondary buck stage stepping down intermediate 12V/24V bus to 1.8V/3.3V for FPGA I/O or microcontroller cores. Use Value: TSOT23-6 footprint enables dense placement near loads; low quiescent current extends standby time in distributed control nodes. |
| Battery Chargers | WLED Drivers |
Use Scenario: Constant-current/constant-voltage charging of 2S–10S Li-ion packs from variable-input sources like solar panels or USB-PD adapters. IC Role / Device Role / Timing Role: Pre-regulator generating stable intermediate voltage for linear charger ICs or buck-boost charge controllers. Use Value: 4.5–50V input range accommodates wide PV panel VOC; adjustable output supports diverse battery termination voltages. | Use Scenario: Driving strings of white LEDs in industrial signage or emergency lighting powered from 12–48V DC rails. IC Role / Device Role / Timing Role: Constant-voltage source feeding external LED driver ICs or resistive current-limiting networks. Use Value: High efficiency (>90%) reduces thermal load in enclosed fixtures; frequency foldback prevents runaway during LED open-circuit faults. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMR14050SDDAR | 50V input, 0.5A, 400kHz–2.5MHz adjustable frequency, no BST pin - uses integrated bootstrap circuit | Requires different layout due to no external BST capacitor; better suited for designs needing programmable frequency or tighter EMI control | Select if frequency tuning or reduced external component count outweighs TSOT23-6 size advantage |
| TPS54260DGQR | 60V input, 0.6A, 100kHz–2.5MHz adjustable frequency, integrated soft-start, higher IQ (140μA) | Higher input voltage margin and adjustable frequency but larger MSOP-10 package and higher quiescent current | Select for 60V surge tolerance or when board space allows larger package and adjustable frequency is required |
Compared with LMR14050SDDAR and TPS54260DGQR, MP2456GJ-Z offers the smallest footprint (TSOT23-6), lowest shutdown current (0.1μA), and fixed 1.2MHz operation ideal for compact, low-noise, battery-backed systems - at the cost of non-adjustable frequency and external BST capacitor requirement.
Availability
MP2456GJ-Z is available at Aetrix Electronics and suitable for power meters, distributed power systems, battery chargers, and WLED drivers requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MP2456GJ-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 controllers.
The MP2456 belongs to MPS's high-voltage buck converter product line, designed specifically for industrial, metering, and battery-powered applications demanding wide input range, small footprint, and robust fault protection in harsh environments.
FAQ
What is the minimum recommended output capacitance for stable operation?
The MP2456GJ-Z is stable with low-ESR ceramic capacitors ≥22µF. Using smaller values (e.g., 10µF) may degrade phase margin and cause output ripple or instability under dynamic load conditions. X5R/X7R dielectrics are mandatory; Y5V or Z5U types introduce unacceptable capacitance drift with voltage and temperature.
Does MP2456GJ-Z support forced PWM mode or skip-cycle operation?
No - MP2456GJ-Z operates exclusively in fixed-frequency current-mode PWM. It does not feature pulse-skipping, burst-mode, or forced continuous conduction mode (FCCM). Light-load efficiency is maintained via low quiescent current (0.85mA typical), not modulation scheme changes.
Can the EN pin be directly tied to IN for always-on operation?
Yes, but only if IN ≤ 50V and the EN pin sink current remains ≤100μA. At VIN = 50V, a minimum 500kΩ pull-up resistor is required to limit EN current to 100μA. Direct tie without series resistance risks exceeding EN's absolute max rating and damaging the input structure.
What is the purpose of the BST capacitor, and what value should be used?
The BST capacitor (0.1µF–1µF, 16V X7R ceramic) forms a floating charge pump that supplies gate drive voltage to the internal high-side MOSFET. It must be placed within 2mm of BST/SW pins. Values <0.1µF risk insufficient gate drive under heavy load; >1µF increases start-up time and may cause bootstrap diode stress.
How does frequency foldback protect the device during output short-circuit?
When FB voltage drops below 250mV (indicating severe overload or short), the oscillator frequency reduces from 1.2MHz to 200kHz. This lowers peak inductor current per cycle, limiting total power dissipation and preventing thermal runaway while maintaining regulation attempt - distinct from hard shutdown.
Is the exposed pad on the TSOT23-6 package electrically connected?
No - the exposed pad on MP2456GJ-Z's TSOT23-6 package is a thermal pad only, not electrically connected to any internal node. It must be soldered to a large copper pour for thermal performance but should not be tied to GND or any signal net to avoid parasitic coupling or ESD path issues.
MP2456GJ-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- SOT-23-6 Thin, TSOT-23-6
- 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):
- 4.5V
- Voltage - Input (Max):
- 50V
- Voltage - Output (Min/Fixed):
- 0.81V
- Voltage - Output (Max):
- 45V
- Current - Output:
- 500mA
- Frequency - Switching:
- 1.2MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-6
MP2456GJ-Z FAQ
1.How can I place an order for MP2456GJ-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2456GJ-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 MP2456GJ-Z reliable?
The price and inventory of MP2456GJ-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP2456GJ-Z is usually 5 days.
3.What payment methods are accepted for MP2456GJ-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2456GJ-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2456GJ-Z?
MP2456GJ-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2456GJ-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 MP2456GJ-Z?
For technical support, including MP2456GJ-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2456GJ-Z requirements.
6.How does Aetrix verify that MP2456GJ-Z is sourced from the original manufacturer or authorized distributors?
All MP2456GJ-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 MP2456GJ-Z meets industry standards.
7.What is the process for return or replacement of MP2456GJ-Z?
All MP2456GJ-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP2456GJ-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 MP2456GJ-Z part is unused and in its original packaging.
Return procedure for MP2456GJ-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MP2456GJ-Z Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
