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onsemi LV5809NMX-TLM-H
- Part No.:
- LV5809NMX-TLM-H
- Manufacturer:
- onsemi
- Package:
- -
- Datasheet:
-
LV5809NMX-TLM-H.pdf
- Description:
- IC REG LIN STEP DOWN SWITCHING
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Inventory:305,000
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Product details
Overview
LV5809NMX-TLM-H from SANYO Semiconductor is a 1-channel current-mode step-down switching regulator with integrated 0.2Ω high-side MOSFET, supporting 4.5–18V input and delivering up to 2.5A output current. It features fixed 330kHz switching frequency, 0.8V reference voltage, soft-start control via external capacitor, and thermal shutdown at 160°C. Used in compact industrial power supplies where efficiency (>90% at 1A/5V) and low standby current (≤40µA) are critical.
For engineers reviewing the LV5809NMX-TLM-H datasheet, pinout, applications, or equivalent options, key selection considerations include its MFP8 (200mil) exposed-pad package, pulse-by-pulse over-current protection, EN pin logic thresholds (VENH = 2.1V, VENL = 0.8V), and FB pin bias current (10–100nA) for precision feedback design.
Technical Context
This Bi-CMOS DC/DC controller uses current-mode PWM control with internal 0.8V reference and 330kHz oscillator-reduced to ~33kHz during short-circuit protection. The BOOT pin drives the high-side FET gate via an external 0.022µF capacitor, requiring series resistance (~100Ω) for noise suppression and SW pin voltage compliance.
Phase compensation is implemented externally at the COMP pin using RC networks; soft-start timing is set by a 10µA internal current source charging an external capacitor to VREF. Over-current protection triggers at peak currents ranging from 2.7A to 5.9A depending on output voltage (1.2V–5V), with thermal shutdown hysteresis of 40°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 18V - supports 5V, 12V, and 15V rail inputs without pre-regulation |
| Output Current Capability | 2.5A continuous - enables single-regulator solutions for FPGA core or microcontroller I/O rails |
| Switching Frequency | 330kHz typical - balances EMI performance and inductor size (e.g., 10µH standard) |
| Reference Voltage | 0.8V ±2% - allows precise output setting from 0.8V to >12V via resistor divider |
| High-Side RDS(on) | 0.2Ω - reduces conduction loss at high load, critical for >1A efficiency targets |
| Standby Current | ≤40µA - enables ultra-low-power sleep modes in battery-backed systems |
| Thermal Shutdown | 160°C with 40°C hysteresis - prevents latch-up and supports safe recovery after overload |
Pinout & Package
MFP8 (200mil) thermally enhanced plastic package with exposed pad for improved heat dissipation; footprint compatible with JEDEC MS-012AC variant. Mounting requires specified 46.4mm × 31.8mm × 1.7mm double-sided glass epoxy board for full 2.05W power dissipation rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 – BOOT | Bootstrap supply for high-side gate driver | Connects 0.022µF ceramic capacitor to SW; 100Ω series resistor suppresses ringing and protects absolute max rating |
| 2 – VIN | Main input power supply | Requires ≥10µF low-ESR ceramic input capacitance placed near pin to minimize voltage ripple and transient spikes |
| 3 – SW | Power switch node | Drives external LC filter; voltage swings from GND to VIN + VBOOT; sensitive to layout-induced noise |
| 4 – GND | Analog and power ground reference | Must be connected to exposed pad and system ground plane with multiple vias to reduce thermal and EMI impedance |
| 5 – FB | Feedback input for output regulation | Senses divided output voltage; 10–100nA bias current enables high-resistor-divider designs minimizing quiescent loss |
| 6 – COMP | Loop compensation node | Accepts external RC network to stabilize control loop phase margin across line/load transients |
| 7 – EN | Enable/disable control input | Active-high logic: ≥2.1V enables, ≤0.8V disables; open-circuit defaults to disable state |
| 8 – SS | Soft-start timing control | Charged by internal 10µA current source; external capacitor sets ramp time (e.g., 0.015µF = 1.2ms) |
Key Features
| Feature | Design Value |
|---|---|
| Pulse-by-pulse over-current protection | Prevents MOSFET failure during short-circuit events by limiting peak switch current per cycle |
| Current-mode control architecture | Provides inherent cycle-by-cycle current limiting and simplifies loop compensation vs. voltage-mode |
| Exposed thermal pad in MFP8 package | Enables 2.05W power dissipation on specified PCB, reducing junction-to-ambient thermal resistance |
| Fixed-frequency 330kHz operation | Ensures predictable EMI profile and allows consistent inductor selection across designs |
| Low 40µA standby current | Supports energy-sensitive applications such as always-on sensor nodes or backup power domains |
Applications
| Industrial PLC I/O Power | Automotive Body Control Module |
|---|---|
Use Scenario: Powering isolated 3.3V or 5V logic rails in programmable logic controller backplanes with variable input (12V/24V). IC Role / Device Role / Timing Role: Primary step-down regulator converting unregulated vehicle or factory bus voltage to stable digital supply. Use Value: High efficiency (>90%) minimizes heat buildup in sealed enclosures; thermal shutdown prevents field failures under sustained overload. | Use Scenario: Supplying microcontroller core and CAN transceiver rails in automotive body electronics with wide input range (9–16V battery). IC Role / Device Role / Timing Role: Main DC/DC converter providing regulated 3.3V for MCU and 5V for analog subsystems. Use Value: 4.5–18V input range accommodates cold-crank and load-dump conditions; EN pin enables controlled power sequencing. |
| Embedded Network Router | Medical Diagnostic Peripheral |
Use Scenario: Generating 1.2V, 1.8V, and 3.3V supplies for SoC, PHY, and memory in compact wired/wireless routers. IC Role / Device Role / Timing Role: High-current buck regulator for processor core voltage domain with tight regulation tolerance. Use Value: 0.8V reference and low FB bias current enable accurate multi-voltage rail generation with minimal divider loss. | Use Scenario: Providing auxiliary 5V and 3.3V rails in non-life-sustaining diagnostic equipment (e.g., ultrasound front-end, patient monitor displays). IC Role / Device Role / Timing Role: Secondary power stage for signal processing and interface ICs outside primary safety-critical path. Use Value: Compact MFP8 package saves board space; soft-start prevents inrush current tripping upstream fuses during power-up. |
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 TPS54202DRCT | 4.5–17V input, 2A output, 500kHz switching, integrated FET, no BOOT pin required | Higher frequency enables smaller magnetics but increases EMI filtering complexity | Preferred when board space is constrained and higher-frequency operation is acceptable |
| Rohm BD9G201EFJ-ME2 | 4.5–36V input, 2A output, 340kHz, built-in soft-start, same MFP-8EP package | Wider input range suits 24V industrial systems; identical pinout simplifies drop-in evaluation | Recommended for new designs targeting extended input voltage and direct package compatibility |
Compared with TPS54202DRCT and BD9G201EFJ-ME2, the LV5809NMX-TLM-H offers lower standby current (40µA vs. 25µA–75µA), tighter reference voltage tolerance (±2%), and proven thermal performance on defined PCBs-but lacks integrated soft-start circuitry, requiring external capacitor on SS pin.
Availability
LV5809NMX-TLM-H is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and embedded networking applications requiring stable component supply, long-term lifecycle support, and verified thermal performance on standard FR4 layouts.
Supply support for LV5809NMX-TLM-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; legacy products maintain industrial qualification and long-lifecycle support.
The LV5809NMX-TLM-H belongs to SANYO's LV58xx series of monolithic synchronous buck regulators designed for compact, high-efficiency DC/DC conversion in space-constrained industrial and automotive applications.
FAQ
What is the maximum allowable input voltage for the LV5809NMX-TLM-H?
The LV5809NMX-TLM-H has a maximum rated input voltage of 20V at the VIN pin. However, the recommended operating range is 4.5V to 18V. Exceeding 18V may trigger overvoltage stress on internal circuitry, especially during transients; designers must account for coil flyback and surge voltages in layout to ensure instantaneous VIN never exceeds 20V. The LV5809NMX-TLM-H datasheet specifies this limit under "Maximum Ratings" with derating guidance for ambient temperature.
How does the BOOT pin function in the LV5809NMX-TLM-H?
The BOOT pin on the LV5809NMX-TLM-H supplies gate drive voltage to the integrated high-side MOSFET. It requires a 0.022µF ceramic capacitor connected between BOOT and SW pins. A 100Ω resistor in series with this capacitor reduces ringing and ensures SW pin voltage stays within its −0.4V to VIN absolute maximum rating. This configuration maintains reliable high-side switching across load and temperature ranges in the LV5809NMX-TLM-H.
Can the LV5809NMX-TLM-H be used in automotive applications?
Yes, the LV5809NMX-TLM-H supports automotive body electronics applications with its 4.5–18V input range, which covers nominal 12V battery systems including cold-crank (down to ~6V) and load-dump (up to ~18V). Its thermal shutdown (160°C) and pulse-by-pulse over-current protection enhance reliability. However, it is not AEC-Q100 qualified; for safety-critical automotive use, additional system-level validation and derating per SANYO's standard application guidance is required for the LV5809NMX-TLM-H.
What is the purpose of the SS (Soft Start) pin on the LV5809NMX-TLM-H?
The SS pin on the LV5809NMX-TLM-H controls output voltage ramp-up time using an internal 10µA current source that charges an external capacitor to the 0.8V reference voltage. The soft-start time TSS is calculated as CSS × 0.8V ÷ 10µA. For example, a 0.015µF capacitor yields ~1.2ms ramp time. This prevents inrush current, limits input capacitor stress, and avoids false triggering of upstream protection circuits during power-up of the LV5809NMX-TLM-H.
Does the LV5809NMX-TLM-H require an external Schottky diode?
No, the LV5809NMX-TLM-H integrates a high-side MOSFET but does not integrate a synchronous rectifier; therefore, an external Schottky diode is required in the standard application circuit to provide the freewheeling path during the low-side conduction phase. The datasheet shows D1 as a discrete Schottky diode in the sample application. Using a low-forward-voltage, fast-recovery Schottky minimizes conduction loss and improves overall efficiency of the LV5809NMX-TLM-H design.
LV5809NMX-TLM-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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- Supplier Device Package:
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LV5809NMX-TLM-H FAQ
1.How can I place an order for LV5809NMX-TLM-H through Aetrix?
Please submit a Request for Quotation (RFQ) for LV5809NMX-TLM-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 LV5809NMX-TLM-H reliable?
The price and inventory of LV5809NMX-TLM-H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LV5809NMX-TLM-H is usually 5 days.
3.What payment methods are accepted for LV5809NMX-TLM-H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LV5809NMX-TLM-H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LV5809NMX-TLM-H?
LV5809NMX-TLM-H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LV5809NMX-TLM-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 LV5809NMX-TLM-H?
For technical support, including LV5809NMX-TLM-H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LV5809NMX-TLM-H requirements.
6.How does Aetrix verify that LV5809NMX-TLM-H is sourced from the original manufacturer or authorized distributors?
All LV5809NMX-TLM-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 LV5809NMX-TLM-H meets industry standards.
7.What is the process for return or replacement of LV5809NMX-TLM-H?
All LV5809NMX-TLM-H units undergo pre-shipment inspection (PSI). If there is an issue with LV5809NMX-TLM-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 LV5809NMX-TLM-H part is unused and in its original packaging.
Return procedure for LV5809NMX-TLM-H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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