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Monolithic Power Systems Inc. MP1580HP-LF
- Part No.:
- MP1580HP-LF
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
MP1580HP-LF.pdf
- Description:
- IC REG BUCK ADJ 2A 8PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,195
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Product details
Overview
MP1580HP-LF from Monolithic Power Systems is a monolithic 2A, 380 kHz step-down DC/DC converter with integrated 0.18 Ω high-side MOSFET, operating from 4.75 V to 25 V input and delivering adjustable output from 1.22 V to 21 V; features cycle-by-cycle current limiting, thermal shutdown, 23 μA shutdown quiescent current, and SYNC pin for external frequency synchronization up to 600 kHz; used in battery chargers and pre-regulators for linear regulators.
For engineers reviewing the MP1580HP-LF datasheet, MP1580HP-LF pinout, MP1580HP-LF application, or MP1580HP-LF equivalent, key selection criteria include input voltage range (4.75–25 V), output current capability (2 A continuous), fixed switching frequency (380 kHz), internal MOSFET RDS(on) (0.18 Ω), and thermal shutdown threshold (160 °C).
Technical Context
The MP1580HP-LF employs peak current-mode control with transconductance error amplifier (770 µA/V) and slope compensation, enabling fast transient response and stable loop behavior across wide load and line variations. Its COMP pin serves as both error amplifier output and current comparator input, directly linking feedback regulation to peak inductor current sensing.
It integrates dual MOSFETs - a 0.18 Ω high-side switch and a 10 Ω low-side switch - with bootstrap gate drive (BS pin) for high-side N-channel operation; the SYNC pin accepts external square-wave signals ≥445 kHz to force oscillator reset, supporting synchronized multi-rail power systems without phase jitter.
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/battery rails without pre-regulation. |
| Switching Frequency | 380 kHz (±9%) - balances EMI performance and inductor size; synchronizable to 445–600 kHz via SYNC pin. |
| Feedback Reference Voltage | 1.222 V (±2.3%) - sets output accuracy; enables precise resistor-divider-based voltage programming (e.g., 3.3 V with 10 kΩ/17 kΩ). |
| High-Side RDS(on) | 0.18 Ω - reduces conduction loss at 2 A (0.72 W max), enabling >95% efficiency at 5 V out / 10 V in. |
| Shutdown Quiescent Current | 23 μA - minimizes standby power in battery-backed systems during EN-pin disable. |
| Thermal Shutdown Threshold | 160 °C - protects against sustained overload or poor PCB thermal design in PDIP-8 package (θJA = 95 °C/W). |
Pinout & Package
MP1580HP-LF is housed in an 8-pin PDIP package (0.300" width), rated for –40°C to +125°C junction temperature, with through-hole mounting and lead-free (RoHS-compliant) finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 BS | Bootstrap supply node | Connects external 10 nF capacitor between SW and BS to generate floating gate drive voltage for high-side MOSFET. |
| 2 IN | Main power input | Accepts 4.75–25 V unregulated input; requires local 10 µF+ low-ESR ceramic capacitor for switching noise suppression. |
| 3 SW | Power switch node | Drives external inductor; connects internally to high-side MOSFET drain and low-side MOSFET source. |
| 4 GND | Analog/digital ground reference | Common return for FB, COMP, EN, SYNC; must be isolated from high-current paths to avoid noise coupling into feedback loop. |
| 5 FB | Output voltage sense input | Monitors resistive divider output; regulates VOUT to 1.222 V at this pin; triggers frequency foldback if <700 mV (short-circuit protection). |
| 6 COMP | Error amplifier output / current comparator input | Hosts RC compensation network (e.g., 10 kΩ + 2 nF) to set loop stability pole-zero; directly proportional to peak inductor current. |
| 7 EN | Enable / UVLO control | Active-high enable (2.62 V threshold); UVLO hysteresis 210 mV prevents chatter near turn-on; pulls 1.46 µA when disabled. |
| 8 SYNC | External oscillator synchronization | Accepts 0–2.7 V logic-low/2.7–6 V logic-high square wave; internal 11 kΩ pull-down allows floating for free-running mode. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 0.18 Ω high-side MOSFET | Eliminates need for external high-side switch and driver, reducing BOM count and layout complexity in compact designs. |
| Stable with ceramic output capacitors | Enables use of small, low-ESR 22 µF ceramic caps (vs. bulkier tantalum/electrolytic), improving reliability and transient response. |
| Programmable under-voltage lockout (UVLO) | EN pin UVLO rising threshold (2.495 V) and hysteresis (210 mV) allow custom input brown-out behavior without external circuitry. |
| Frequency synchronization input | SYNC pin enables deterministic multi-converter phase alignment in multi-rail systems, reducing input ripple and EMI peaks. |
| Cycle-by-cycle over-current protection | Prevents MOSFET failure during short-circuit or overload by limiting peak inductor current to 2.4–3.6 A (derated above 25°C). |
Applications
| Battery Charging Systems | Distributed Power Architectures |
|---|---|
|
Use Scenario: Step-down conversion from 12 V or 24 V vehicle or wall adapter input to charge 3.3 V or 5 V USB-powered devices. IC Role / Device Role / Timing Role: Primary buck regulator providing constant-current/constant-voltage charging stage with tight output regulation and thermal safety. Use Value: Internal 0.18 Ω MOSFET and 23 μA shutdown current extend battery runtime and simplify charger thermal management in portable enclosures. |
Use Scenario: Local point-of-load (POL) regulation in industrial PLC backplanes or telecom line cards where multiple isolated rails are required. IC Role / Device Role / Timing Role: Secondary buck converter deriving 2.5 V or 3.3 V from a shared 12 V intermediate bus, synchronized to system clock via SYNC pin. Use Value: 380 kHz fixed frequency plus SYNC capability enables predictable EMI filtering and eliminates beat frequencies in multi-converter systems. |
| Pre-Regulator for Linear Regulators | Industrial Sensor Signal Conditioning |
|
Use Scenario: Efficient pre-regulation stage feeding low-noise LDOs (e.g., 5 V → 3.3 V LDO) in analog measurement subsystems. IC Role / Device Role / Timing Role: High-efficiency intermediate converter reducing power dissipation in downstream linear regulators under variable load. Use Value: Up to 95% efficiency at full load minimizes heat generation upstream of thermally sensitive analog components and LDOs. |
Use Scenario: Powering precision op-amps, ADCs, and analog front-ends in factory automation sensors operating from 24 V field buses. IC Role / Device Role / Timing Role: Compact, robust DC/DC supply delivering clean, regulated 5 V or ±5 V (with buck-boost config) in harsh EMI environments. Use Value: Built-in thermal shutdown and cycle-by-cycle current limiting ensure fault resilience during sensor cable shorts or ESD events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP1584EN-LF | Higher 3 A output current, 1.5 MHz switching frequency, SOIC8 only - no PDIP option. | Requires smaller inductors/caps but increases EMI filtering burden; not pin-compatible with MP1580HP-LF. | Select when higher output current and board space reduction outweigh thermal derating needs in PDIP-mount designs. |
| LM2678-5.0/NOPB | Fixed 5 V output, 5 A capability, 63 kHz frequency, TO-220 package - lacks SYNC, programmable UVLO, and ceramic-cap stability. | Suitable for high-current, low-frequency, non-synchronized applications; larger footprint and lower efficiency at light loads. | Choose only for fixed 5 V outputs where cost-sensitive TO-220 assembly is preferred and EMI constraints are relaxed. |
Compared with MP1584EN-LF and LM2678-5.0/NOPB, MP1580HP-LF uniquely combines PDIP-8 through-hole compatibility, 380 kHz fixed frequency with SYNC support, ceramic-cap stability, and 2 A output in a legacy-friendly package - making it optimal for serviceable industrial controls and legacy-replacement designs requiring thermal margin and layout simplicity.
Availability
MP1580HP-LF is available at Aetrix Electronics and suitable for battery charging systems, distributed power architectures, and pre-regulator applications requiring stable component supply, long-term obsolescence planning, and RoHS-compliant through-hole assembly.
Supply support for MP1580HP-LF 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 operations.
The MP1580 product line delivers highly integrated, thermally robust DC/DC buck converters targeting industrial, automotive, and telecom power systems where reliability, efficiency, and ease of implementation are critical.
FAQ
What is the maximum recommended input voltage for MP1580HP-LF?
The absolute maximum input voltage is 27 V, but the recommended operating range is 4.75 V to 25 V. Exceeding 25 V risks violating the 27 V absolute rating under transient conditions and may accelerate degradation of the internal 0.18 Ω MOSFET. Designers should include input clamping or filtering for systems exposed to load-dump or surge events.
Can MP1580HP-LF operate with 100% duty cycle?
No - the MP1580HP-LF has a maximum duty cycle of 90%, enforced by internal timing limits. At VFB = 1.0 V, the controller disables high-side switching beyond 90% on-time to prevent bootstrap capacitor discharge and maintain gate drive integrity. For near-100% duty applications, consider a different topology or part with extended duty capability.
Is an external Schottky diode required for MP1580HP-LF operation?
Yes - the MP1580HP-LF uses asynchronous buck architecture with an internal low-side MOSFET (10 Ω RDS(on)) but requires an external Schottky diode (e.g., B230, SR23) from SW to GND to conduct inductor current when the high-side switch is off. Omitting it causes catastrophic failure due to lack of freewheeling path.
How does the frequency foldback function protect the device during short circuits?
When FB voltage drops below 700 mV (indicating severe overload or short), the internal frequency foldback comparator reduces oscillator frequency from 380 kHz to 20–54 kHz. This lowers average switching losses and limits peak inductor current, preventing thermal runaway while maintaining regulation attempt - a safer alternative to hard current limiting alone.
What is the purpose of the BS (Bootstrap) pin, and what capacitor value is recommended?
The BS pin supplies gate drive voltage to the internal high-side MOSFET via a flying capacitor between BS and SW. A 10 nF ceramic capacitor is recommended per the datasheet; it must withstand ~5 V ripple and be placed adjacent to the IC to minimize parasitic inductance. Larger values (>22 nF) risk insufficient charging time at high duty cycles.
Does MP1580HP-LF support negative output configurations?
Yes - the MP1580HP-LF can be configured as a buck-boost regulator to generate negative outputs (e.g., –5 V), as shown in Figure 3 of the datasheet. In this mode, the GND pin becomes the negative output rail, and maximum input voltage is reduced by the magnitude of the negative output (e.g., 20 V max for –5 V out) to stay within the 25 V absolute rating.
What is the minimum output voltage achievable with MP1580HP-LF?
The minimum regulated output voltage is 1.22 V - equal to the internal bandgap reference voltage at the FB pin. Output voltages below 1.22 V cannot be stably regulated because the error amplifier cannot drive COMP low enough to reduce duty cycle further; attempting lower outputs results in dropout or unregulated behavior.
MP1580HP-LF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- 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:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
MP1580HP-LF FAQ
1.How can I place an order for MP1580HP-LF through Aetrix?
Please submit a Request for Quotation (RFQ) for MP1580HP-LF 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 MP1580HP-LF reliable?
The price and inventory of MP1580HP-LF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP1580HP-LF is usually 5 days.
3.What payment methods are accepted for MP1580HP-LF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP1580HP-LF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP1580HP-LF?
MP1580HP-LF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP1580HP-LF 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 MP1580HP-LF?
For technical support, including MP1580HP-LF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP1580HP-LF requirements.
6.How does Aetrix verify that MP1580HP-LF is sourced from the original manufacturer or authorized distributors?
All MP1580HP-LF 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 MP1580HP-LF meets industry standards.
7.What is the process for return or replacement of MP1580HP-LF?
All MP1580HP-LF units undergo pre-shipment inspection (PSI). If there is an issue with MP1580HP-LF, 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 MP1580HP-LF part is unused and in its original packaging.
Return procedure for MP1580HP-LF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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