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Monolithic Power Systems Inc. MP1580HS-LF-P
- Part No.:
- MP1580HS-LF-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MP1580HS-LF-P.pdf
- Description:
- IC REG BUCK ADJ 2A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,723
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Product details
Overview
MP1580HS-LF-P from Monolithic Power Systems is a monolithic 2A, 380 kHz step-down DC/DC converter with integrated 0.18 Ω high-side MOSFET, 4.75–25 V input range, adjustable 1.22–21 V output, and cycle-by-cycle current limiting - used in battery chargers and distributed power systems.
For engineers reviewing the MP1580HS-LF-P datasheet, MP1580HS-LF-P pinout, MP1580HS-LF-P application, or MP1580HS-LF-P equivalent, key selection criteria include thermal shutdown at 160°C, 23 μA shutdown quiescent current, fixed-frequency current-mode control for fast transient response, and SOIC-8 package compatibility with standard PCB layouts.
Technical Context
The MP1580HS-LF-P implements fixed-frequency current-mode control with internal transconductance error amplifier (770 µA/V), slope-compensated current sensing, and a 380 kHz oscillator (±9% tolerance). Its COMP pin serves as both error amplifier output and current comparator input, enabling direct loop compensation via external R-C networks.
It integrates bootstrap gate drive circuitry (5 V internal supply) to support high-side N-channel MOSFET switching, uses an internal 1.222 V bandgap reference for feedback regulation, and includes programmable UVLO (2.495 V rising threshold with 210 mV hysteresis) and frequency synchronization capability up to 600 kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 2 A continuous - supports mid-power embedded loads without external current boosting. |
| Input Voltage Range | 4.75 V to 25 V - accommodates 5 V, 12 V, and 24 V industrial rails with margin. |
| Switching Frequency | 380 kHz (typical), ±9% - balances EMI, inductor size, and efficiency in compact designs. |
| Feedback Reference | 1.222 V ±24 mV - sets output voltage accuracy via external resistor divider (e.g., 10 kΩ/17 kΩ for 3.3 V). |
| High-Side RDS(on) | 0.18 Ω - limits conduction loss at 2 A (≈0.72 W dissipation), enabling >95% peak efficiency. |
| Shutdown Current | 23 μA - enables ultra-low-power system sleep modes without auxiliary LDOs. |
| Thermal Shutdown | 160 °C - protects against sustained overload or poor heatsinking in enclosed enclosures. |
| Sync Input Range | 445–600 kHz - allows deterministic EMI reduction by aligning switching with system clocks. |
Pinout & Package
MP1580HS-LF-P is housed in an 8-pin SOIC package (JEDEC MS-012AC, 3.9 mm × 4.9 mm × 1.75 mm), rated for –40°C to +125°C junction temperature, with θJA = 105°C/W on 1″² 1 oz copper.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 BS | Bootstrap Supply | Connects external 10 nF capacitor between SW and BS to generate floating gate drive voltage for high-side MOSFET. |
| 2 IN | Main Input Supply | Accepts 4.75–25 V unregulated input; requires local 10 µF low-ESR ceramic capacitor for stability. |
| 3 SW | Power Switch Node | Drives external inductor; swings between IN and GND; carries full switching current and di/dt noise. |
| 4 GND | Analog & Power Ground | Reference for FB, COMP, and EN; must be star-connected outside high-current return paths to avoid noise coupling. |
| 5 FB | Feedback Input | Senses output voltage via resistive divider; internal 1.222 V reference enables precise output regulation. |
| 6 COMP | Compensation Node | Error amplifier output and current comparator input; external RC network sets loop stability and crossover frequency (~40 kHz). |
| 7 EN | Enable / UVLO Input | Active-high enable (≥2.62 V); <0.7 V forces 23 μA shutdown; internal 1.46 μA pull-up enables simple resistor-based sequencing. |
| 8 SYNC | Frequency Synchronization | Accepts external 445–600 kHz square wave; internal 11 kΩ pull-down allows NC for standalone operation. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 0.18 Ω High-Side MOSFET | Eliminates external switch and driver, reducing BOM count and layout complexity for 2 A buck converters. |
| Stable with Ceramic Output Capacitors | Supports low-ESR 22 µF ceramic caps without phase-margin degradation, enabling smaller, more reliable output filtering. |
| Current-Mode Control with Slope Compensation | Ensures stable operation across all duty cycles, including >65%, and provides inherent cycle-by-cycle overcurrent protection. |
| Programmable UVLO with Hysteresis | 2.495 V rising threshold + 210 mV hysteresis prevents oscillation during brown-out conditions in wide-input systems. |
| Thermal Shutdown & Cycle-by-Cycle Limiting | Dual fault protection: immediate current foldback during short-circuit and graceful shutdown above 160°C junction temperature. |
| Frequency Synchronization Input | Enables EMI compliance by locking switching to master clock, avoiding beat frequencies in multi-rail power systems. |
Applications
| Battery Charger Pre-Regulator | Distributed Power System Point-of-Load |
|---|---|
|
Use Scenario: Regulating 12 V or 24 V bus down to 5 V or 3.3 V for Li-ion charging ICs in portable medical devices. IC Role / Device Role / Timing Role: Primary step-down regulator delivering stable 2 A output with tight line/load regulation and low-noise switching. Use Value: Enables single-stage conversion from wide-input battery packs while maintaining <1% output deviation under 0–2 A load steps. |
Use Scenario: Providing isolated 3.3 V/2 A rails to FPGA I/O banks and microcontroller peripherals in industrial PLC backplanes. IC Role / Device Role / Timing Role: Local DC/DC converter with programmable UVLO and sync input to coordinate timing with system clock domain. Use Value: Reduces conducted EMI through synchronized switching and maintains regulation during 4.75–25 V input transients common in factory power environments. |
| Pre-Regulator for Linear Regulators | Automotive Body Control Module Supply |
|
Use Scenario: Generating 5 V intermediate rail for low-noise LDOs powering analog sensors and ADC references in test equipment. IC Role / Device Role / Timing Role: Efficient pre-regulator minimizing heat dissipation before final linear regulation stage. Use Value: Achieves >95% efficiency at full load, cutting thermal load on downstream LDOs and enabling compact, fanless enclosures. |
Use Scenario: Powering microcontrollers and CAN transceivers in automotive BCMs where input may dip to 4.75 V during cranking. IC Role / Device Role / Timing Role: Wide-input buck converter with robust UVLO hysteresis and thermal shutdown for harsh automotive environments. Use Value: Maintains regulated output during cold-crank events (down to 4.75 V) and survives 125°C ambient with SOIC thermal performance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2307DN-LF-Z | 3 A rating, 500 kHz switching, 4.5–26 V input, but no SYNC pin and higher 2.5 mA quiescent current. | Lacks frequency synchronization - unsuitable for EMI-sensitive multi-converter systems requiring deterministic switching alignment. | Select when higher output current is required and EMI coordination is not critical; verify thermal design for 3 A continuous load. |
| LM2678SD-ADJ/NOPB | 2.5 A, 260 kHz, 8–40 V input, external MOSFET required, 50 µA shutdown current, no internal bootstrap. | Requires external high-side switch and gate driver - increases component count, layout area, and design validation effort. | Choose only if input exceeds 25 V or if discrete FET control is needed for specialized topologies like synchronous rectification. |
Compared with MP1580HS-LF-P, MP2307DN-LF-Z trades synchronization capability for higher current and faster switching, while LM2678SD-ADJ/NOPB sacrifices integration and low-IQ for extended input voltage range and flexibility - making MP1580HS-LF-P optimal for space-constrained, EMI-aware 2 A applications within its 4.75–25 V window.
Availability
MP1580HS-LF-P is available at Aetrix Electronics and suitable for battery chargers, distributed power systems, and pre-regulator circuits requiring stable component supply, RoHS-compliant packaging, and long-term industrial lifecycle support.
Supply support for MP1580HS-LF-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 distribution since 1997.
The MP1580 belongs to MPS's monolithic DC/DC converter product line, engineered for cost-sensitive, space-constrained applications needing integrated power switches, wide input ranges, and robust protection - targeting industrial, computing, and consumer power systems.
FAQ
What is the minimum input voltage required for MP1580HS-LF-P to regulate a 3.3 V output?
The MP1580HS-LF-P requires ≥4.75 V input to maintain regulation. At 3.3 V output, the minimum practical input is ~5.5 V due to dropout constraints of the internal switch and bootstrap circuit - below this, the high-side MOSFET cannot sustain gate drive, causing pulse-skipping or loss of regulation.
Can MP1580HS-LF-P operate without an external Schottky diode?
No - MP1580HS-LF-P uses asynchronous buck topology and requires an external Schottky diode (e.g., B230, SR22) connected from SW to GND to conduct inductor current during high-side switch off-time. Omitting it causes catastrophic failure due to lack of freewheeling path.
How does the SYNC pin affect the internal oscillator when driven externally?
A rising edge on SYNC forces immediate reset of the internal oscillator, turning off the high-side switch within 250 ns and restarting the switching cycle. This overrides the internal 380 kHz clock, enabling precise EMI spreading or synchronization with system clocks up to 600 kHz.
What is the role of the BS pin, and why is a capacitor required between BS and SW?
The BS pin supplies gate drive voltage to the internal high-side MOSFET. The 10 nF capacitor between BS and SW forms a flying capacitor that charges to ~5 V when SW is low, then floats to boost the gate above IN during high-side conduction - essential for N-channel MOSFET operation.
Is MP1580HS-LF-P compatible with ceramic output capacitors below 10 µF?
Yes - MP1580HS-LF-P is explicitly characterized for stability with low-ESR ceramic capacitors as small as 22 µF (per datasheet Figure 3 and Table 4). Using <10 µF risks insufficient energy storage and instability; 22 µF ceramic is the validated minimum for 2 A loads.
Does MP1580HS-LF-P support negative output configurations?
Yes - the datasheet confirms buck-boost configuration for negative outputs (e.g., –5 V), with GND pin referenced to the negative rail. Input voltage must be reduced by the magnitude of the negative output (e.g., max 20 V input for –5 V out) to stay within 25 V absolute rating.
What is the maximum achievable duty cycle, and how does it impact high-VOUT designs?
The MP1580HS-LF-P supports up to 90% duty cycle (per Electrical Characteristics table). For outputs >12 V, ensure input remains ≥1.1×VOUT to avoid operating near duty cycle limit, where bootstrap capacitor recharge time degrades and gate drive weakens - use external bootstrap diode per datasheet recommendation.
MP1580HS-LF-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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):
- 4.75V
- Voltage - Input (Max):
- 25V
- Voltage - Output (Min/Fixed):
- 1.22V
- Voltage - Output (Max):
- 21V
- Current - Output:
- 2A
- Frequency - Switching:
- 380kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MP1580HS-LF-P FAQ
1.How can I place an order for MP1580HS-LF-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MP1580HS-LF-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 MP1580HS-LF-P reliable?
The price and inventory of MP1580HS-LF-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP1580HS-LF-P is usually 5 days.
3.What payment methods are accepted for MP1580HS-LF-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP1580HS-LF-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP1580HS-LF-P?
MP1580HS-LF-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP1580HS-LF-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 MP1580HS-LF-P?
For technical support, including MP1580HS-LF-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP1580HS-LF-P requirements.
6.How does Aetrix verify that MP1580HS-LF-P is sourced from the original manufacturer or authorized distributors?
All MP1580HS-LF-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 MP1580HS-LF-P meets industry standards.
7.What is the process for return or replacement of MP1580HS-LF-P?
All MP1580HS-LF-P units undergo pre-shipment inspection (PSI). If there is an issue with MP1580HS-LF-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 MP1580HS-LF-P part is unused and in its original packaging.
Return procedure for MP1580HS-LF-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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