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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - DC DC Switching Regulators

Monolithic Power Systems Inc. MP1580HS-LF

Name: MP1580HS-LF
Brand: Monolithic Power Systems Inc.
SKU: MP1580HS-LF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MP1580HS-LF

Manufacturer:: Monolithic Power Systems Inc.

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: MP1580HS-LF.pdf

Description:: IC REG BUCK ADJ 2A 8SOIC

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MP1580HS-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. It features cycle-by-cycle current limiting, thermal shutdown, 23 μA shutdown quiescent current, and synchronization capability up to 600 kHz - deployed in battery chargers and distributed power systems.

For engineers reviewing the MP1580HS-LF datasheet, MP1580HS-LF pinout, MP1580HS-LF application, or MP1580HS-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 R_DS(on) (0.18 Ω), and feedback reference voltage (1.222 V).

Technical Context

The MP1580HS-LF employs peak current-mode control with transconductance error amplifier (770 µA/V typical g_m) and slope compensation for stable operation across wide duty cycles. Its COMP pin serves as both error amplifier output and current comparator input, enabling direct loop compensation via external R-C networks.

It integrates dual MOSFETs - a 0.18 Ω high-side switch and a 10 Ω low-side switch - with bootstrap gate drive (BS pin) supporting high-side N-channel operation. The SYNC pin accepts external square-wave signals ≥445 kHz to force oscillator reset, while EN provides programmable UVLO (2.495 V rising threshold, 210 mV hysteresis).

Key Specifications

Parameter	Value and Actual Design Meaning
Output Current	2 A continuous - supports compact 2A point-of-load conversion without external power switches
Input Voltage Range	4.75 V to 25 V - compatible with 5 V, 12 V, and 24 V industrial rails
Switching Frequency	380 kHz (±9%) - balances EMI, inductor size, and efficiency for mid-power applications
Feedback Reference	1.222 V ±24 mV - enables precise output regulation using standard resistor dividers
High-Side R_DS(on)	0.18 Ω - reduces conduction loss at 2A, enabling >95% efficiency at 5 V out / 12 V in
Shutdown Current	23 μA - minimizes system standby power in battery-backed or always-on designs
Current Limit Threshold	3.0 A typical - provides robust short-circuit protection with 0.011 A/°C thermal derating
Thermal Shutdown	160 °C - protects against sustained overload or poor PCB thermal design

Pinout & Package

MP1580HS-LF is housed in an 8-pin SOIC package (SOIC-8), with 1.27 mm pitch, JEDEC MS-012AC compliant, rated for –40°C to +125°C junction temperature and θ_JA = 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 power input	Accepts 4.75–25 V unregulated input; requires local 10 µF+ low-ESR ceramic capacitor
3 SW	Power switch node	Drives external inductor; connects to IN (high-side ON) or GND (low-side ON); carries full switching current
4 GND	Analog/digital ground reference	Common return for FB, COMP, EN, SYNC; must be isolated from high-current paths to avoid noise coupling
5 FB	Output voltage sense	Resistive divider tap sets output: V_OUT = 1.222 × (1 + R1/R2); fault foldback activates below 700 mV
6 COMP	Error amplifier output	Transconductance amplifier output (770 µA/V); compensation network (R+C to GND) sets loop stability
7 EN	Enable/UVLO control	Active-high enable (≥2.62 V); <700 mV forces 23 µA shutdown; internal 1.46 µA pull-up
8 SYNC	Oscillator synchronization	External clock input (445–600 kHz); internal 11 kΩ pull-down; leave open for free-running 380 kHz 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
Stable with ceramic output capacitors	Enables use of small, low-ESR 22 µF ceramic caps without phase-margin degradation
Programmable UVLO with hysteresis	2.495 V rising threshold + 210 mV hysteresis prevents oscillation during brown-in/brown-out conditions
Frequency synchronization input	Allows deterministic EMI reduction by locking switching to system clock or adjacent converters
Cycle-by-cycle overcurrent protection	Detects per-cycle peak inductor current to prevent MOSFET failure during shorts or startup surges
Thermal shutdown with auto-recovery	Halts switching at 160°C junction; resumes operation after cooldown - no latch required

Applications

Battery Charging Systems

Distributed Power Architectures

Use Scenario: Step-down stage in multi-cell Li-ion charger supplying 5 V/2 A to USB-PD or charging IC.

IC Role / Device Role / Timing Role: Primary buck regulator providing regulated intermediate bus voltage before linear or switching charge management.

Use Value: 0.18 Ω R_DS(on) and 95% efficiency minimize heat rise in enclosed battery packs; 23 μA shutdown preserves battery shelf life.

Use Scenario: Intermediate 3.3 V or 5 V rail generation in telecom line cards powered from 12 V or 24 V backplane.

IC Role / Device Role / Timing Role: Point-of-load (POL) DC/DC converter delivering stable low-voltage power to FPGAs, PHYs, and SerDes.

Use Value: Wide 4.75–25 V input accommodates varying backplane tolerances; SYNC pin enables coherent switching across multiple rails to suppress beat frequencies.

Pre-Regulator for Linear Regulators

Industrial Sensor Signal Conditioning

Use Scenario: Efficient pre-regulation stage ahead of low-noise LDOs powering analog front-ends or precision ADCs.

IC Role / Device Role / Timing Role: High-efficiency buck converter reducing dropout voltage and thermal load on downstream LDOs.

Use Value: Adjustable 1.22–21 V output allows optimal LDO headroom selection; low 23 μA shutdown enables fast wake-up in sensor sleep modes.

Use Scenario: Compact 3.3 V supply for MEMS accelerometers, pressure sensors, and 4–20 mA transmitter ICs in field instruments.

IC Role / Device Role / Timing Role: Isolated, low-noise power source meeting IEC 61000-4-5 surge immunity requirements via robust input filtering.

Use Value: Thermal shutdown and cycle-by-cycle OCP ensure reliability in unattended remote deployments; SOIC-8 package supports automated optical inspection.

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	3A output, 500 kHz fixed frequency, 0.12 Ω R_DS(on), same SOIC-8 package	Higher current and frequency suit denser layouts but require tighter layout for EMI control	Select when >2 A load margin or faster transient response is needed; verify thermal performance at full load
LM2678SD-5.0/NOPB	5 V fixed output, 5 A, 260 kHz, external MOSFETs, TO-263-7 package	Fixed-output simplifies design but lacks adjustability and integration; larger footprint	Choose only if 5 V fixed output suffices and board space permits TO-263; higher cost and BOM count

Compared with MP1580HS-LF, MP2307DN-LF-Z offers higher current and frequency at the expense of increased sensitivity to layout-induced EMI, while LM2678SD-5.0/NOPB trades integration and adjustability for raw output capability and fixed-voltage simplicity - making MP1580HS-LF optimal for compact, adjustable 2A POL designs.

Availability

MP1580HS-LF is available at Aetrix Electronics and suitable for battery chargers, distributed power systems, and pre-regulator circuits requiring stable component supply, long-term manufacturability, and RoHS-compliant packaging.

Supply support for MP1580HS-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, WA, with global design and support centers.

The MP1580 belongs to MPS's monolithic buck converter product line, engineered for high-efficiency, low-component-count DC/DC conversion in space-constrained industrial and portable applications - emphasizing integration, thermal robustness, and ease of loop compensation.

FAQ

What is the minimum recommended input capacitance for MP1580HS-LF?

A minimum 10 µF low-ESR ceramic capacitor is required at the IN pin, placed as close as possible to minimize high-frequency switching noise. For best results, combine a 0.1 µF ceramic near the pin with a bulk 10–22 µF tantalum or electrolytic capacitor nearby - ensuring RMS ripple current rating exceeds half the DC load current.

Can MP1580HS-LF operate with a 3.3 V input?

No. MP1580HS-LF has a minimum input voltage of 4.75 V per its Absolute Maximum Ratings and Recommended Operating Conditions. Operation below this threshold may result in unstable regulation, failure to start, or undefined behavior - it is not characterized or guaranteed for 3.3 V input.

How is output voltage adjusted on MP1580HS-LF?

Output voltage is set using a resistive divider from V_OUT to GND, with the FB pin connected to the divider midpoint. The formula is V_OUT = 1.222 × (1 + R1/R2), where R2 is typically 10 kΩ. For example, a 3.3 V output uses R1 = 17 kΩ and R2 = 10 kΩ; values must maintain FB bias current within datasheet limits.

Does MP1580HS-LF require an external Schottky diode?

Yes - an external Schottky diode (e.g., B230, SR22, SS23) is required for the freewheeling path when the high-side MOSFET is off. The diode must have reverse voltage rating exceeding maximum input voltage and average current rating exceeding 2 A; low forward voltage and fast recovery are critical for efficiency.

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 ceramic capacitor between BS and SW creates a floating supply that charges to ~5 V when SW is low, enabling full enhancement of the N-channel high-side switch - essential for proper operation above ~65% duty cycle.

Is MP1580HS-LF pin-compatible with MP1580HP?

Yes - MP1580HS-LF (SOIC-8) and MP1580HP (PDIP-8) share identical pinout and electrical specifications, differing only in package type and thermal resistance (θ_JA = 105°C/W vs. 95°C/W). Layout and schematic can be reused, but thermal design must account for package-specific dissipation limits.

How does the SYNC pin affect switching behavior?

A rising edge on SYNC forces immediate reset of the internal oscillator, turning off the high-side MOSFET and initiating the next switching cycle. When driven with a clean square wave ≥445 kHz, it locks the MP1580HS-LF to the external frequency - enabling synchronized multi-rail operation and deterministic EMI shaping.

MP1580HS-LF Specifications

Product attributes: Attribute value

Manufacturer:: Monolithic Power Systems Inc.

Series:: -

Package/Case:: 8-SOIC (0.154", 3.90mm Width)

Packaging:: Tube

Product Status:: Active

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 FAQ

1.How can I place an order for MP1580HS-LF through Aetrix?

Please submit a Request for Quotation (RFQ) for MP1580HS-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 MP1580HS-LF reliable?

The price and inventory of MP1580HS-LF 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 is usually 5 days.

3.What payment methods are accepted for MP1580HS-LF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP1580HS-LF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MP1580HS-LF?

MP1580HS-LF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MP1580HS-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 MP1580HS-LF?

For technical support, including MP1580HS-LF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP1580HS-LF requirements.

6.How does Aetrix verify that MP1580HS-LF is sourced from the original manufacturer or authorized distributors?

All MP1580HS-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 MP1580HS-LF meets industry standards.

7.What is the process for return or replacement of MP1580HS-LF?

All MP1580HS-LF units undergo pre-shipment inspection (PSI). If there is an issue with MP1580HS-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 MP1580HS-LF part is unused and in its original packaging.

Return procedure for MP1580HS-LF:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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