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onsemi LV5856MX-MPB-H
- Part No.:
- LV5856MX-MPB-H
- Manufacturer:
- onsemi
- Package:
- -
- Datasheet:
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LV5856MX-MPB-H.pdf
- Description:
- IC REG BUCK
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Product details
Overview
LV5856MX-MPB-H from SANYO Semiconductor is a 1-channel current-mode step-down switching regulator IC with integrated high- and low-side 0.13Ω MOSFETs, delivering up to 3A output current at 93% efficiency (VIN=12V, VOUT=5V, IOUT=1A), fixed 340kHz switching frequency, and 0.923V reference voltage. It operates from 8–18V input and supports soft-start, thermal shutdown, and hiccup-mode over-current protection in automotive and industrial power supply applications.
For engineers reviewing the LV5856MX-MPB-H datasheet, pinout, applications, or equivalent options, key selection considerations include its MFP8 (200mil) thermally enhanced package, EN-controlled standby current ≤60μA, cycle-by-cycle current limiting, UVLO thresholds (6.0V lock / 6.9V release), and COMP-pin-based Type-II compensation for stable loop design.
Technical Context
This Bi-CMOS regulator uses peak-current-mode control with internal 0.923V reference and dedicated COMP pin for external Type-II compensation network implementation. Its architecture integrates bootstrap gate drive (BOOT pin), synchronous power switch (SW pin), and discharge transistor (35Ω typical) for soft-stop functionality.
The IC features dual protection mechanisms: thermal shutdown at 160°C (40°C hysteresis) and cycle-by-cycle over-current detection triggering hiccup-mode recovery. Input UVLO (6.0V/6.9V) and EN pin logic (1.5V threshold) enable robust system-level power sequencing and fault containment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output current | 3A continuous - supports compact DC/DC designs for mid-power loads without external MOSFETs |
| Switching frequency | 340kHz fixed - enables predictable EMI filtering and consistent inductor sizing |
| Reference voltage | 0.923V ±2% - sets output via resistive divider; enables precise 3.3V/5V/12V rail generation |
| Efficiency | 93% at 1A/5V out from 12V in - minimizes thermal load in enclosed or convection-cooled systems |
| Standby current | ≤60μA - meets low-power sleep requirements in battery-backed or always-on subsystems |
| UVLO thresholds | 6.0V lock / 6.9V release - prevents erratic startup during brown-out conditions |
| Thermal shutdown | 160°C activation with 40°C hysteresis - ensures safe recovery after overload or ambient rise |
Pinout & Package
MFP8 (200mil) thermally enhanced surface-mount package with exposed heat sink pad - 5.0mm × 4.4mm footprint, 1.7mm max height, 8-pin single-row layout optimized for PCB heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: BOOT | Bootstrap capacitor connection | Supplies gate drive voltage for high-side MOSFET; requires 0.1μF ceramic cap + ~15Ω series resistor to SW |
| 2: VIN | Main input supply | Accepts 8–18V; requires ≥10μF bulk capacitance to GND for stability and transient response |
| 3: SW | Power switch node | Connects to inductor and BOOT cap; includes integrated 35Ω discharge transistor for soft-stop |
| 4: GND | Power and signal ground | Common return path for input cap, feedback, and compensation networks |
| 5: FB | Feedback input | Senses output voltage via resistive divider; referenced to 0.923V internal bandgap |
| 6: COMP | Compensation node | Connects external RC network for loop stability; supports Type-II compensation topology |
| 7: EN | Enable control | Active-high logic (1.5V threshold); disables IC and reduces ICC to ≤60μA when low or open |
| 8: SS | Soft-start timing | 6μA internal current source charges external capacitor to control ramp-up time (e.g., 0.015μF = 2.3ms) |
Key Features
| Feature | Design Value |
|---|---|
| Integrated dual MOSFETs | 0.13Ω RDS(on) high- and low-side switches eliminate external FETs and reduce BOM count |
| Hiccup-mode OCP | Cycle-by-cycle current limit triggers automatic restart after fault clearance - prevents thermal runaway |
| Thermal shutdown with hysteresis | 160°C trip + 40°C hysteresis ensures reliable recovery without oscillation near thermal limit |
| Soft-start/soft-stop | SS pin controls startup ramp; SW pin internal discharge transistor enables controlled output decay on disable |
| UVLO with precise thresholds | 6.0V lock / 6.9V release provides clean, noise-immune input voltage monitoring for robust sequencing |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC I/O Power Supply |
|---|---|
Use Scenario: Regulating 12V vehicle battery to stable 5V for microcontroller and CAN transceiver rails. IC Role / Device Role / Timing Role: Primary step-down regulator providing isolated, protected 5V domain with EN-controlled sleep mode. Use Value: 93% efficiency reduces heat in sealed enclosures; hiccup OCP prevents fuse blow during solenoid short-circuits. | Use Scenario: Generating 3.3V from 24V DC bus for programmable logic controller digital I/O circuitry. IC Role / Device Role / Timing Role: Fixed-frequency buck converter with FB-divider configured for 3.3V output and COMP-tuned stability. Use Value: 0.923V reference enables accurate 3.3V setting; thermal shutdown protects against ambient >80°C cabinet operation. |
| Point-of-Load Converter for Motor Drive MCU | Smart Sensor Node Power Management |
Use Scenario: Local 3.3V supply for motor control MCU adjacent to high-noise gate drivers. IC Role / Device Role / Timing Role: Compact, thermally robust buck regulator placed near load to minimize trace inductance and noise coupling. Use Value: MFP8 package with heat sink pad maintains junction temperature <125°C under 2A load; SS pin eliminates inrush stress. | Use Scenario: Battery-powered environmental sensor node requiring ultra-low quiescent current during sleep cycles. IC Role / Device Role / Timing Role: Enable-controlled primary regulator entering ≤60μA standby when host MCU asserts EN low. Use Value: Standby current enables multi-year battery life; hiccup OCP preserves battery during sensor short-circuit faults. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Texas Instruments TPS54331DR | 3A, 28V input, 570kHz fSW, 0.8V ref, no integrated low-side FET (external diode required) | Higher fSW allows smaller inductor but increases switching loss; lacks hiccup OCP and soft-stop | Choose for higher-frequency designs where external diode is acceptable and thermal margin exists |
| Rohm BD9G341AEFJ-E2 | 3A, 36V input, 340kHz fSW, 0.8V ref, integrated high/low FETs, 60μA IQ in shutdown | Wider VIN range and lower ref voltage; different pinout and compensation structure | Choose for 24V industrial systems needing extended input range and similar thermal performance |
Compared with TPS54331DR and BD9G341AEFJ-E2, LV5856MX-MPB-H offers matched 340kHz frequency and integrated dual-FET topology like the Rohm part, but with higher 0.923V reference enabling tighter tolerance on 3.3V/5V rails - critical for legacy MCU compatibility where 0.8V ref would require resistor recalibration.
Availability
LV5856MX-MPB-H is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC power supplies, and smart sensor node designs requiring stable component supply, long-term lifecycle support, and thermally robust DC/DC conversion.
Supply support for LV5856MX-MPB-H 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
SANYO Semiconductor Co., Ltd. was a Japanese semiconductor manufacturer specializing in analog and power management ICs before its acquisition by ON Semiconductor in 2011; its legacy products emphasize high-reliability, thermally optimized power solutions.
The LV5856MX-MPB-H belongs to SANYO's Bi-CMOS step-down regulator product line, designed specifically for automotive and industrial applications demanding integrated power switches, robust protection, and compact thermally enhanced packaging.
FAQ
What is the maximum input voltage rating for LV5856MX-MPB-H?
The LV5856MX-MPB-H has a maximum input voltage rating of 20V at the VIN pin. This rating applies under standard operating conditions; designers must account for transient spikes and inductive kickback by ensuring the absolute maximum voltage-including coil and surge voltages-is never exceeded, even momentarily. The BOOT pin supports up to 25V, and the SW pin rating tracks VIN.
How does the soft-start function work on LV5856MX-MPB-H?
The LV5856MX-MPB-H implements soft-start via an internal 6μA current source connected to the SS pin. An external capacitor (e.g., 0.015μF for 2.3ms) is charged from this source, controlling the ramp rate of the output voltage. This prevents inrush current and stabilizes the feedback loop during startup. The SS pin must be left open or pulled low to disable soft-start.
What thermal protection features does LV5856MX-MPB-H include?
LV5856MX-MPB-H incorporates thermal shutdown activated at 160°C junction temperature, with 40°C hysteresis to prevent oscillation near the trip point. When triggered, the IC halts switching and enters a safe state until temperature falls below 120°C. This protection is independent of EN status and remains active during all operating modes, including standby.
Can LV5856MX-MPB-H operate with an input voltage below 8V?
No - the recommended operating input voltage range for LV5856MX-MPB-H is 8V to 18V. Below 8V, the IC may not start due to UVLO lock (6.0V), and even if operational, performance parameters such as efficiency, output regulation, and current capability are not guaranteed. Operation outside the specified range risks instability or undefined behavior.
What is the purpose of the COMP pin on LV5856MX-MPB-H?
The COMP pin on LV5856MX-MPB-H serves as the error amplifier output for closed-loop compensation. It connects to an external Type-II RC network (typically one capacitor and one series RC) between COMP and FB to stabilize the control loop. Proper compensation ensures phase margin >45° and prevents oscillation under varying load and input conditions - essential for reliable regulation across the full 3A output range.
LV5856MX-MPB-H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- -
- Output Configuration:
- -
- Topology:
- -
- Output Type:
- -
- Number of Outputs:
- -
- Voltage - Input (Min):
- -
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Frequency - Switching:
- -
- Synchronous Rectifier:
- -
- Operating Temperature:
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- Grade:
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- Qualification:
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- Supplier Device Package:
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LV5856MX-MPB-H FAQ
1.How can I place an order for LV5856MX-MPB-H through Aetrix?
Please submit a Request for Quotation (RFQ) for LV5856MX-MPB-H 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 LV5856MX-MPB-H reliable?
The price and inventory of LV5856MX-MPB-H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LV5856MX-MPB-H is usually 5 days.
3.What payment methods are accepted for LV5856MX-MPB-H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LV5856MX-MPB-H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LV5856MX-MPB-H?
LV5856MX-MPB-H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LV5856MX-MPB-H 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 LV5856MX-MPB-H?
For technical support, including LV5856MX-MPB-H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LV5856MX-MPB-H requirements.
6.How does Aetrix verify that LV5856MX-MPB-H is sourced from the original manufacturer or authorized distributors?
All LV5856MX-MPB-H 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 LV5856MX-MPB-H meets industry standards.
7.What is the process for return or replacement of LV5856MX-MPB-H?
All LV5856MX-MPB-H units undergo pre-shipment inspection (PSI). If there is an issue with LV5856MX-MPB-H, 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 LV5856MX-MPB-H part is unused and in its original packaging.
Return procedure for LV5856MX-MPB-H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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