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Texas Instruments LV2842XLVDDCT
- Part No.:
- LV2842XLVDDCT
- Manufacturer:
- Texas Instruments
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LV2842XLVDDCT.pdf
- Description:
- IC REG BUCK ADJ 600MA SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,949
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Product details
Overview
LV2842XLVDDCT from Texas Instruments is a non-synchronous step-down DC/DC regulator optimized for 600-mA continuous output current, operating from 4.5 V to 42 V input, with fixed 550-kHz switching frequency, 0.765-V feedback reference, and integrated 0.9-Ω high-side MOSFET - used in industrial distributed power and battery-powered equipment requiring compact, efficient voltage conversion.
For engineers reviewing the LV2842XLVDDCT datasheet, LV2842XLVDDCT pinout, LV2842XLVDDCT application, or LV2842XLVDDCT equivalent, key selection criteria include input voltage range (4.5–42 V), output current capability (600 mA), thermal shutdown (175°C trip), shutdown quiescent current (16 µA), and SOT-6L package compatibility with space-constrained PCB layouts.
Technical Context
The LV2842XLVDDCT implements current-mode PWM control with internal compensation, enabling stable regulation without external loop components. Its functional block includes an error amplifier, 0.765-V bandgap reference, oscillator (550 kHz), gate driver, and thermal/UVLO protection circuits.
It operates in continuous conduction mode with minimum on-time of 100 ns and maximum duty cycle of 94%, supporting wide VIN-to-VOUT ratios. The CB pin supplies gate bias for the internal high-side switch, while SHDN enables logic-controlled enable/disable with 2.3-V turn-on threshold and 0.3-V turn-off threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 42 V - supports direct connection to 12/24/36-V industrial rails and wide-range battery inputs. |
| Max Output Current | 600 mA - rated continuous load capacity per LM2842X specification; validated at TJ ≤ 125°C. |
| Switching Frequency | 550 kHz - fixed frequency enables predictable EMI filtering and small external LC component sizing. |
| Feedback Reference Voltage | 0.765 V - sets output via resistor divider; tolerance ±1.5% (0.747–0.782 V) ensures tight VOUT accuracy. |
| High-Side RDS(ON) | 0.9 Ω (typ) - low conduction loss improves efficiency, especially at mid-load (e.g., 85% typical at 12 V → 3.3 V, 100 mA). |
| Shutdown Quiescent Current | 16 µA (typ) - ultra-low IQ preserves battery life in standby mode for portable systems. |
| Thermal Shutdown Threshold | 175°C (typ) - protects die during overload or poor heatsinking; auto-recovery at ~155°C. |
Pinout & Package
SOT-6L (DDC) package: 1.60 mm × 2.90 mm body size, low-profile surface-mount design optimized for thermal performance and board area efficiency.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CB | Bootstrap supply | Bias voltage source for high-side MOSFET gate drive; requires 0.15-µF ceramic capacitor between CB and SW. |
| GND | Power ground | Reference node for all internal circuitry and return path for SW, FB, and SHDN currents. |
| FB | Feedback input | Monitors output via resistor divider; regulates VOUT = 0.765 V × (1 + R1/R2); input bias <1 µA minimizes divider error. |
| SHDN | Enable control | Active-high logic input; pull ≥2.3 V to enable, ≤0.3 V to disable; must not float; ties to VIN if unused. |
| VIN | Main power input | Supplies internal circuitry and high-side switch; accepts 4.5–42 V; bypassed with 2.2-µF ceramic capacitor. |
| SW | Switch node | Drives external inductor and bootstrap capacitor; connects to cathode of Schottky diode and L1. |
Key Features
| Feature | Design Value |
|---|---|
| Internally compensated | Eliminates need for external compensation network - reduces BOM count and layout sensitivity. |
| Soft-start via SHDN | RC-controlled ramp-up of current limit enables user-tailored inrush current limiting without extra ICs. |
| Short-circuit protected | Cycle-by-cycle current limiting prevents damage during output short; limits peak switch current to 1.15 A (min). |
| Low RDS(ON) switch | 0.9-Ω typical ON-resistance minimizes conduction loss and thermal rise at full 600-mA load. |
| UVLO with hysteresis | Turns on at 3.7 V, off at 3.5 V - prevents erratic operation during brownout or battery sag conditions. |
Applications
| Industrial Distributed Power | Battery-Powered Equipment |
|---|---|
Use Scenario: Converting 24-V factory bus to 3.3-V logic supply for PLC I/O modules. IC Role / Device Role / Timing Role: Primary buck regulator delivering regulated 3.3 V at up to 600 mA with minimal external components. Use Value: Enables compact, thermally robust local regulation without heatsink, leveraging 550-kHz switching and SOT-6L thermal resistance (RθJA = 121°C/W). | Use Scenario: Powering GPS receiver and MCU in handheld surveying instrument powered by Li-ion pack (8–16 V). IC Role / Device Role / Timing Role: Efficient step-down converter maintaining stable 5-V rail across battery discharge curve. Use Value: 16-µA shutdown IQ extends runtime in sleep mode; 4.5–42-V input accommodates full battery voltage range including charging transients. |
| Portable Hand-Held Instruments | Automotive Aftermarket Modules |
Use Scenario: Supplying 12-V analog front-end and 3.3-V digital core in portable oscilloscope. IC Role / Device Role / Timing Role: Dual-output capable regulator (via external divider) delivering precise, low-noise rails. Use Value: 0.765-V feedback reference enables accurate VOUT setting; internal soft-start prevents display flicker during power-up. | Use Scenario: Regulating 12–36-V vehicle battery to 5-V USB power in dashcam or telematics unit. IC Role / Device Role / Timing Role: Input-transient tolerant buck controller surviving load-dump and cold-crank events. Use Value: 42-V absolute max input rating and UVLO hysteresis ensure reliable operation under automotive electrical stress conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2842YLVDDCT | 1.25-MHz switching frequency vs. 550 kHz; identical 600-mA rating, same SOT-6L package. | Better suited for ultra-compact designs where smaller inductors/capacitors are mandatory. | Select LM2842YLVDDCT when board area is constrained and higher-frequency operation is acceptable. |
| TPS54202DRCT | Synchronous buck (no external diode), 4.5–28-V input, 2-A output, 500-kHz freq, SOIC-8 package. | Higher current, lower dropout, but larger footprint and different pinout - not drop-in. | Choose TPS54202DRCT when >600-mA load or synchronous efficiency (>90%) is required. |
Compared with LV2842XLVDDCT, LM2842YLVDDCT offers faster transient response and smaller magnetics at the cost of higher switching loss, while TPS54202DRCT delivers double the output current and synchronous rectification but requires PCB redesign and additional external components.
Availability
LV2842XLVDDCT is available at Aetrix Electronics and suitable for industrial distributed power, battery-powered equipment, and portable hand-held instruments requiring stable component supply and long-term production continuity.
Supply support for LV2842XLVDDCT 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
Texas Instruments is a global semiconductor company specializing in analog, embedded processing, and power management technologies, with leadership in high-reliability industrial and automotive solutions.
The LM284x family - including LV2842XLVDDCT - was designed for simple, robust DC/DC conversion in space- and cost-sensitive applications, emphasizing ease-of-use, minimal external components, and wide-input-voltage resilience.
FAQ
What is the maximum continuous output current supported by the LV2842XLVDDCT?
The LV2842XLVDDCT is rated for 600 mA continuous output current under recommended operating conditions (TJ ≤ 125°C, VIN = 12 V, VOUT = 3.3 V). This is confirmed in the Electrical Characteristics table (ICL = 1.15 A min, derated for thermal limits), and aligns with the LM2842 device designation in TI's SNVS540K datasheet.
Does the LV2842XLVDDCT require an external Schottky diode, and why?
Yes, the LV2842XLVDDCT requires an external Schottky diode (e.g., MA2YD26) because it is a non-synchronous buck regulator. The diode provides the freewheeling path during the low-side switch off-time. Its breakdown voltage must exceed 1.25× maximum VIN (e.g., ≥53 V for 42-V input), and average current rating should match the output load.
How is the output voltage set on the LV2842XLVDDCT?
The output voltage is set using a resistor divider from VOUT to GND, connected to the FB pin. With a fixed 0.765-V internal reference, VOUT = 0.765 V × (1 + R1/R2). For example, R1 = 3.4 kΩ and R2 = 1.02 kΩ yields 3.3 V. Resistor values must stay within 100 Ω–10 kΩ to avoid bias-current-induced errors.
What is the purpose of the CB pin on the LV2842XLVDDCT, and how must it be connected?
CB is the bootstrap capacitor terminal for the high-side MOSFET gate drive. It must be connected via a 0.15-µF (minimum) ceramic capacitor to the SW pin. This creates a floating voltage rail above SW to fully enhance the internal N-channel switch. Failure to connect CBOOT results in insufficient gate drive and high RDS(ON).
Can the LV2842XLVDDCT be used in automotive applications?
The LV2842XLVDDCT is not AEC-Q200 qualified and lacks automotive-specific validation (e.g., extended temperature testing beyond 125°C junction, enhanced ESD, or load-dump immunity characterization). While its 42-V absolute max input and UVLO hysteresis support some aftermarket use, TI publishes separate automotive-grade variants (e.g., LM2842-Q1) for safety-critical vehicle systems.
LV2842XLVDDCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-6 Thin, TSOT-23-6
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4V
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 0.765V
- Voltage - Output (Max):
- 38.4V
- Current - Output:
- 600mA
- Frequency - Switching:
- 1.1MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-THIN
LV2842XLVDDCT FAQ
1.How can I place an order for LV2842XLVDDCT through Aetrix?
Please submit a Request for Quotation (RFQ) for LV2842XLVDDCT 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 LV2842XLVDDCT reliable?
The price and inventory of LV2842XLVDDCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LV2842XLVDDCT is usually 5 days.
3.What payment methods are accepted for LV2842XLVDDCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LV2842XLVDDCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LV2842XLVDDCT?
LV2842XLVDDCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LV2842XLVDDCT 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 LV2842XLVDDCT?
For technical support, including LV2842XLVDDCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LV2842XLVDDCT requirements.
6.How does Aetrix verify that LV2842XLVDDCT is sourced from the original manufacturer or authorized distributors?
All LV2842XLVDDCT 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 LV2842XLVDDCT meets industry standards.
7.What is the process for return or replacement of LV2842XLVDDCT?
All LV2842XLVDDCT units undergo pre-shipment inspection (PSI). If there is an issue with LV2842XLVDDCT, 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 LV2842XLVDDCT part is unused and in its original packaging.
Return procedure for LV2842XLVDDCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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