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Monolithic Power Systems Inc. MP1580HS-LF-Z
- Part No.:
- MP1580HS-LF-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MP1580HS-LF-Z.pdf
- Description:
- IC REG BUCK ADJ 2A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,103
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Product details
Overview
MP1580HS-LF-Z from Monolithic Power Systems is a monolithic 2A, 380 kHz current-mode 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 thermal shutdown protection. It delivers stable power in battery chargers, distributed power systems, and pre-regulator stages for linear regulators.
For engineers reviewing the MP1580HS-LF-Z datasheet, MP1580HS-LF-Z pinout, MP1580HS-LF-Z application, or MP1580HS-LF-Z equivalent, key selection criteria include its fixed-frequency current-mode control architecture, bootstrap gate drive requirement, cycle-by-cycle overcurrent protection, and SOIC-8 package thermal performance (θJA = 105 °C/W).
Technical Context
The MP1580HS-LF-Z implements peak current-mode control with an internal transconductance error amplifier (770 µA/V), slope compensation, 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 features programmable UVLO (2.495 V rising threshold, 210 mV hysteresis), synchronization capability (445–600 kHz external clock), and dual-switch topology: a 0.18 Ω upper MOSFET and 10 Ω lower MOSFET for bootstrap capacitor charging during light load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 2 A continuous - supports mid-power embedded loads without external current boosting. |
| Switching Frequency | 380 kHz typical - balances EMI, inductor size, and efficiency for industrial power rails. |
| Input Voltage Range | 4.75 V to 25 V - accommodates 5 V, 12 V, and 24 V nominal bus systems with margin. |
| Feedback Reference Voltage | 1.222 V ±24 mV - sets output accuracy; enables precise resistor-divider-based voltage programming. |
| High-Side MOSFET RDS(on) | 0.18 Ω - limits conduction loss at 2 A, enabling >95% peak efficiency at 5 V out / 12 V in. |
| Shutdown Quiescent Current | 23 µA - minimizes standby drain in battery-backed or always-on systems. |
| Thermal Shutdown Threshold | 160 °C - protects die integrity under sustained overload or poor PCB thermal design. |
Pinout & Package
MP1580HS-LF-Z is housed in an 8-pin SOIC package (SOIC-8), with exposed pad not present; θJA = 105 °C/W on 1"² 1 oz copper. Pin functions are validated per MP1580 Rev. 3.0 datasheet.
| 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 ≥10 µF low-ESR ceramic input capacitor placed adjacent to pin. |
| 3 SW | Switch node | Drives external inductor; swings between IN and GND; high dv/dt node requiring tight layout and ground plane isolation. |
| 4 GND | Analog/digital ground reference | Single-point star ground connection point; must be isolated from high-current return paths to avoid feedback noise. |
| 5 FB | Voltage feedback input | Senses output via resistor divider; 1.222 V reference enables output adjustment from 1.22 V to 21 V. |
| 6 COMP | Compensation node | Error amplifier output and current comparator input; external RC network sets loop stability and transient response. |
| 7 EN | Enable/UVLO control | Active-high enable (≥2.62 V); <0.7 V forces 23 µA shutdown; internal 1.46 µA pull-up aids open-drain control. |
| 8 SYNC | External clock synchronization | Accepts 445–600 kHz square wave (2.7 V min high); internal 11 kΩ pull-down allows floating disable. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 0.18 Ω high-side MOSFET | Reduces BOM count and PCB area vs. controller + external FET solutions; eliminates gate driver design effort. |
| Stable with ceramic output capacitors | Enables use of small, low-ESR 22 µF X5R/X7R ceramics without phase-margin degradation-no tantalum required. |
| Cycle-by-cycle overcurrent protection | Detects peak inductor current each switching cycle; prevents MOSFET failure during short-circuit or startup overload. |
| Programmable UVLO with hysteresis | 2.495 V turn-on threshold with 210 mV hysteresis avoids oscillation near input brownout conditions. |
| Frequency synchronization input | Allows EMI reduction by locking switching frequency to system clock or spreading spectrum source. |
Applications
| Battery Charger Stage | Distributed Power System |
|---|---|
|
Use Scenario: Step-down stage in 12 V automotive or portable Li-ion charger delivering 5 V @ 2 A to USB-PD or charge management IC. IC Role / Device Role / Timing Role: Primary buck regulator providing regulated intermediate rail; operates at fixed 380 kHz for predictable filter design. Use Value: Integrated 0.18 Ω MOSFET and 25 V max input support direct connection to vehicle battery or adapter without pre-regulation. |
Use Scenario: Local 3.3 V or 5 V point-of-load supply in telecom shelf or industrial PLC backplane with 12–24 V intermediate bus. IC Role / Device Role / Timing Role: Standalone DC/DC converter with EN-controlled sequencing and SYNC for multi-rail EMI alignment. Use Value: 2 A output and wide input range eliminate need for additional pre-regulators; SOIC-8 footprint simplifies layout in dense board areas. |
| Linear Regulator Pre-Regulator | Industrial Sensor Node Supply |
|
Use Scenario: Efficient pre-regulator feeding low-noise LDOs (e.g., 3.3 V LDO from 12 V bus) in analog signal chains or RF subsystems. IC Role / Device Role / Timing Role: High-efficiency buck stage reducing LDO dropout and thermal stress; fixed frequency eases downstream filtering. Use Value: 95% peak efficiency at 5 V/2 A reduces heat dissipation versus linear solution, extending LDO lifetime and reliability. |
Use Scenario: Compact 2.5 V or 3.3 V supply for microcontroller, ADC, and wireless transceiver in battery-powered IIoT sensor node. IC Role / Device Role / Timing Role: Main power converter with EN pin enabling MCU-controlled sleep/wake cycling; low 23 µA shutdown current preserves battery life. Use Value: Adjustable output and UVLO programmability allow optimization for specific battery chemistry and end-of-life voltage thresholds. |
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 output, 500 kHz switching, same SOIC-8 package, but higher RDS(on) (0.14 Ω typ) and no SYNC pin. | Lacks synchronization capability; better suited for higher-current, non-EMI-sensitive designs where 500 kHz improves filter size. | Select when >2 A load or smaller inductors are needed, and EMI coordination is unnecessary. |
| LM2678SD-5.0/NOPB | 5 V fixed output, 5 A capability, TO-263 package, 260 kHz frequency, no programmable UVLO or SYNC. | Fixed-output variant; larger thermal footprint; intended for high-current, cost-sensitive industrial supplies-not adjustable or sync-capable. | Choose only for fixed 5 V, high-current (>3 A) applications where board space and EMI control are secondary. |
Compared with MP1580HS-LF-Z, MP2307DN-LF-Z trades synchronization and tighter UVLO control for higher current and frequency, while LM2678SD-5.0/NOPB sacrifices adjustability and package compactness for raw output capability-making MP1580HS-LF-Z optimal for precision, space-constrained, and EMI-managed 2 A designs.
Availability
MP1580HS-LF-Z is available at Aetrix Electronics and suitable for battery chargers, distributed power systems, and linear regulator pre-regulator applications requiring stable component supply across production lifecycles.
Supply support for MP1580HS-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 California and serving global industrial, computing, and automotive markets.
The MP1580 belongs to MPS's integrated buck converter product line, designed specifically for compact, high-efficiency mid-power DC/DC conversion in space- and thermal-constrained applications where simplicity and reliability are critical.
FAQ
What is the minimum recommended input capacitance for MP1580HS-LF-Z?
The datasheet specifies ≥10 µF for the input capacitor, using low-ESR ceramic, tantalum, or electrolytic types. A 0.1 µF ceramic capacitor should be placed immediately adjacent to the IN pin to suppress high-frequency switching noise, while a larger bulk capacitor (e.g., 22–47 µF) may be located nearby for RMS current handling. Total RMS current rating must exceed half the DC load current.
Can MP1580HS-LF-Z operate with a 3.3 V input?
No. The absolute minimum operating input voltage is 4.75 V per the Recommended Operating Conditions table. At 3.3 V, the internal bias circuitry and gate drive cannot sustain proper regulation or MOSFET switching, resulting in dropout or non-functional behavior.
How is output voltage adjusted on MP1580HS-LF-Z?
Output voltage is set using a resistive divider from VOUT to GND, with the FB pin connected to the divider midpoint. With a 1.222 V internal reference, VOUT = 1.222 × (1 + R1/R2). For example, 3.3 V output uses R2 = 10 kΩ and R1 ≈ 17 kΩ. R2 values up to 100 kΩ are supported, but 10 kΩ is typical for noise immunity.
Does MP1580HS-LF-Z require an external Schottky diode?
Yes. The MP1580HS-LF-Z uses asynchronous buck topology and requires an external Schottky rectifier (e.g., B230, SR23, SS23) connected from SW to GND. This diode conducts inductor current when the high-side MOSFET is off. Selection must meet max input voltage reverse rating and ≥2 A average forward current.
What is the purpose of the BS pin and its associated capacitor?
The BS (Bootstrap) pin supplies gate drive voltage to the high-side MOSFET. A 10 nF capacitor between BS and SW provides a floating 5 V supply referenced to the SW node, enabling full enhancement of the internal N-channel MOSFET. Without this capacitor, the high-side switch cannot turn on properly, causing regulation failure.
Is MP1580HS-LF-Z RoHS-compliant and lead-free?
Yes. The "-LF" suffix explicitly denotes lead-free and RoHS-compliant construction. The device meets JEDEC J-STD-020 moisture sensitivity level (MSL) requirements for SOIC-8 packaging and is qualified for reflow soldering per standard profiles.
How does the SYNC pin affect operation during startup?
The SYNC pin has no effect during startup unless an external clock is applied before EN assertion. Once enabled, a rising edge on SYNC forces immediate oscillator reset and high-side MOSFET turn-off, synchronizing switching edges to the external source. If left unconnected, the internal 11 kΩ pull-down ensures autonomous 380 kHz operation.
MP1580HS-LF-Z 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:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MP1580HS-LF-Z FAQ
1.How can I place an order for MP1580HS-LF-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP1580HS-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 MP1580HS-LF-Z reliable?
The price and inventory of MP1580HS-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 MP1580HS-LF-Z is usually 5 days.
3.What payment methods are accepted for MP1580HS-LF-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP1580HS-LF-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP1580HS-LF-Z?
MP1580HS-LF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP1580HS-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 MP1580HS-LF-Z?
For technical support, including MP1580HS-LF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP1580HS-LF-Z requirements.
6.How does Aetrix verify that MP1580HS-LF-Z is sourced from the original manufacturer or authorized distributors?
All MP1580HS-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 MP1580HS-LF-Z meets industry standards.
7.What is the process for return or replacement of MP1580HS-LF-Z?
All MP1580HS-LF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP1580HS-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 MP1580HS-LF-Z part is unused and in its original packaging.
Return procedure for MP1580HS-LF-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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