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Monolithic Power Systems Inc. MP1496DJ-LF-Z
- Part No.:
- MP1496DJ-LF-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
MP1496DJ-LF-Z.pdf
- Description:
- IC REG BUCK ADJ 2A TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:2,890
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Product details
Overview
MP1496DJ-LF-Z from Monolithic Power Systems is a synchronous step-down DC/DC converter IC with integrated 100mΩ high-side and 40mΩ low-side MOSFETs, delivering up to 2A continuous output current across a 4.5V–16V input range, fixed 500kHz switching frequency, and adjustable output voltage starting at 0.8V - deployed in notebook I/O power and flat-panel display supplies.
For engineers reviewing the MP1496DJ-LF-Z datasheet, MP1496DJ-LF-Z pinout, MP1496DJ-LF-Z application, or MP1496DJ-LF-Z equivalent, key selection criteria include internal MOSFET RDS(on), soft-start programmability via SS pin, thermal shutdown at 150°C, and external clock synchronization capability from 200kHz to 2MHz.
Technical Context
The MP1496DJ-LF-Z implements peak-current-mode control with an internal 0.807V feedback reference and proprietary switching-loss-reduction technique to maintain high efficiency across load transients. Its error amplifier features optimized internal compensation, minimizing external components while supporting stable regulation with ceramic, tantalum, or electrolytic output capacitors.
It integrates a 5V internal VCC regulator powered from VIN, bootstrap circuitry with BST pin for high-side gate drive, and cycle-by-cycle over-current protection that triggers hiccup mode during sustained short-circuit faults - all housed in an 8-pin TSOT23 package with thermal resistance θJA = 100°C/W.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 16V - supports wide industrial and consumer input rails including 5V, 12V, and 15V systems. |
| Output Current | 2A continuous - sufficient for powering core logic, memory, and interface ICs in compact electronics. |
| Switching Frequency | Fixed 500kHz (±12%) - enables small external inductors and reduces EMI compared to lower-frequency converters. |
| Feedback Reference | 0.807V ±20mV - sets precise output voltage via external resistor divider; supports outputs from 0.8V to VIN−3V. |
| Internal MOSFETs | 100mΩ HS / 40mΩ LS - reduces conduction loss and improves full-load efficiency without external FETs. |
| Soft-Start Control | Externally programmable via SS pin current source (11μA) - prevents inrush current and ensures controlled startup. |
| Thermal Shutdown | 150°C with 20°C hysteresis - protects die during overload or poor PCB thermal design; auto-recovery at ~130°C. |
Pinout & Package
MP1496DJ-LF-Z is packaged in an 8-pin TSOT23 surface-mount package with exposed pad for thermal enhancement. Pin numbering follows standard top-view orientation with pin 1 at top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SS | Soft-Start Input | Connects to external capacitor to set startup ramp time; internal 11μA current source charges CSS. |
| 2 IN | Main Input Supply | Accepts 4.5V–16V input; requires local 22μF ceramic decoupling capacitor near pin. |
| 3 SW | Switch Node Output | Drives external inductor; high dv/dt node requiring short, wide PCB trace and isolation from analog signals. |
| 4 GND | Power Ground Reference | System ground return for output voltage regulation; must connect directly to large copper plane with multiple vias. |
| 5 BST | Bootstrap Supply | Connects to SW via 0.1μF capacitor to generate floating gate drive for high-side MOSFET. |
| 6 EN/SYNC | Enable & Clock Sync Input | Digital enable (1.2–1.6V threshold); also accepts 200kHz–2MHz external clock for frequency synchronization. |
| 7 VCC | Bias Regulator Output | 5V internal supply for control circuitry; requires 0.1–0.22μF ceramic decoupling capacitor placed adjacent to pin. |
| 8 FB | Feedback Input | Monitors output voltage via resistor divider; compares against 0.807V reference to regulate output. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Integrated 100mΩ/40mΩ MOSFET pair eliminates external diode, improving efficiency by ≥5% at 1A load. |
| External clock synchronization | EN/SYNC pin accepts 200kHz–2MHz external clock, enabling noise-sensitive designs to avoid EMI bands. |
| Frequency fold-back protection | Reduces fSW to 25% of nominal when FB < 400mV - prevents current-limit runaway during output short-circuit. |
| Hiccup-mode OCP | Enters periodic restart after over-current detection, limiting average fault current and die temperature rise. |
| Optimized internal compensation | Eliminates need for external compensation network - simplifies layout and reduces BOM count for most applications. |
Applications
| Notebook I/O Power | Digital Set-Top Box Core Supply |
|---|---|
Use Scenario: Powers USB controller, card reader, and audio codec in ultraportable notebooks with 12V input rail. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering regulated 3.3V/2A with fast transient response to burst I/O loads. Use Value: Integrated MOSFETs and 500kHz operation allow compact 2-layer PCB layout with minimal external components. | Use Scenario: Supplies 1.8V/2A to SoC subsystems in cable/satellite STBs operating from 12V wall adapter. IC Role / Device Role / Timing Role: Main point-of-load converter with programmable soft-start to sequence power to video processing ICs. Use Value: 0.807V reference and T-type feedback network ensure tight output accuracy (<±2%) across temperature. |
| Flat-Panel Monitor Logic Rail | Distributed Power System Intermediate Bus |
Use Scenario: Generates 2.5V/2A for timing controller and LVDS transmitter in 24-inch LCD monitors. IC Role / Device Role / Timing Role: Secondary buck stage stepping down 12V intermediate bus to logic-level voltages. Use Value: Thermal shutdown and hiccup-mode OCP protect against backlight driver coupling faults and connector shorts. | Use Scenario: Provides isolated 5V/2A auxiliary rail in telecom base station power architecture with 48V input. IC Role / Device Role / Timing Role: Non-isolated intermediate bus converter synchronized to system clock to reduce conducted EMI. Use Value: External clock sync capability allows alignment with master timing source, easing EMC compliance testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2332DJ-LF-Z | Higher 3A output rating, 2.5V–18V input, 1.2MHz switching, improved light-load efficiency | Designed for next-gen portable devices requiring higher current density and smaller magnetics | Select when upgrading from MP1496DJ-LF-Z for increased output current or tighter board space constraints |
| TPS562211DDFR | TI part with 2A output, 4.5V–18V input, 650kHz fSW, different pinout and no BST pin | Lacks bootstrap architecture - uses integrated high-side FET driver without external BST capacitor | Choose if existing layout accommodates different pin assignment and design favors TI ecosystem support |
Compared with MP1496DJ-LF-Z, MP2332DJ-LF-Z offers higher current and frequency for denser designs, while TPS562211DDFR provides alternate control architecture without bootstrap dependency - both require PCB redesign but deliver comparable regulation performance.
Availability
MP1496DJ-LF-Z is available at Aetrix Electronics and suitable for notebook computers, digital set-top boxes, flat-panel television logic rails, and distributed power systems requiring stable component supply and long-term industrial availability.
Supply support for MP1496DJ-LF-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, headquartered in Kirkland, Washington, with global design and support centers.
The MP1496 belongs to MPS's high-efficiency synchronous buck converter product line, engineered for space-constrained consumer and computing applications where integration, thermal robustness, and EMI control are critical.
FAQ
What is the recommended input capacitor value and type for MP1496DJ-LF-Z?
A 22μF X5R/X7R ceramic capacitor is recommended for most applications, placed as close as possible to the IN and GND pins. It must handle RMS current exceeding half the maximum load current (≥1A RMS for 2A output). A 0.1μF ceramic capacitor should be added in parallel if using bulk electrolytic or tantalum types.
Can MP1496DJ-LF-Z operate with an input voltage below 4.5V?
No - the absolute minimum operating input voltage is 4.5V per the Recommended Operating Conditions. Below this, the internal UVLO circuit disables operation. The absolute maximum input is 17V, but continuous operation above 16V violates specification limits and risks damage.
How does the EN/SYNC pin function in enable-only versus synchronization mode?
When driven high (>1.4V), EN/SYNC enables regulation. When an external clock signal (200kHz–2MHz, <1.7μs pulse width) is applied, the internal oscillator synchronizes to its rising edge - preserving duty cycle control while aligning switching edges to reduce beat frequencies and EMI.
What is the purpose of the BST pin and required external components?
The BST pin supplies the floating gate drive voltage for the high-side MOSFET. A 0.1μF ceramic capacitor must be connected between BST and SW pins. A 10Ω resistor in series with the BST capacitor is strongly recommended to dampen SW node ringing and reduce voltage spikes on BST.
Does MP1496DJ-LF-Z support adjustable switching frequency?
It has a fixed nominal frequency of 500kHz, but supports external synchronization from 200kHz to 2MHz via the EN/SYNC pin. It does not support free-running frequency adjustment - only locking to an external clock source within that range.
What happens during output short-circuit condition?
When FB drops below 400mV, frequency fold-back reduces fSW to 25% of nominal. If over-current persists, hiccup mode activates: the device shuts down for ~2ms, then attempts restart. This limits average short-circuit current to ~300mA and prevents thermal runaway.
Is MP1496DJ-LF-Z RoHS compliant and lead-free?
Yes - the "-LF" suffix indicates lead-free, RoHS-compliant packaging. All MPS products meet RoHS Directive 2011/65/EU requirements and are green-status qualified per MPS Quality Assurance documentation.
MP1496DJ-LF-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- SOT-23-8 Thin, TSOT-23-8
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 13V
- Current - Output:
- 2A
- Frequency - Switching:
- 500kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-8
MP1496DJ-LF-Z FAQ
1.How can I place an order for MP1496DJ-LF-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP1496DJ-LF-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 MP1496DJ-LF-Z reliable?
The price and inventory of MP1496DJ-LF-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP1496DJ-LF-Z is usually 5 days.
3.What payment methods are accepted for MP1496DJ-LF-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP1496DJ-LF-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP1496DJ-LF-Z?
MP1496DJ-LF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP1496DJ-LF-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 MP1496DJ-LF-Z?
For technical support, including MP1496DJ-LF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP1496DJ-LF-Z requirements.
6.How does Aetrix verify that MP1496DJ-LF-Z is sourced from the original manufacturer or authorized distributors?
All MP1496DJ-LF-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 MP1496DJ-LF-Z meets industry standards.
7.What is the process for return or replacement of MP1496DJ-LF-Z?
All MP1496DJ-LF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP1496DJ-LF-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 MP1496DJ-LF-Z part is unused and in its original packaging.
Return procedure for MP1496DJ-LF-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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