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Texas Instruments LM2832YSDX
- Part No.:
- LM2832YSDX
- Manufacturer:
- Texas Instruments
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
LM2832YSDX.pdf
- Description:
- IC REG BUCK ADJ 2A 6WSON
- Quantity:
- Payment:
- Shipping:
Inventory:3,096
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Product details
Overview
LM2832YSDX from Texas Instruments is a monolithic, high-frequency PWM step-down DC-DC regulator in an 8-pin eMSOP-PowerPAD package, delivering 2.0A output current with 0.55MHz switching frequency, 0.6V internal reference, and 150mΩ PMOS switch - used for local 5V-to-3.3V core power conversion in USB-powered devices and set-top boxes.
For engineers reviewing the LM2832YSDX datasheet, LM2832YSDX pinout, LM2832YSDX application, or LM2832YSDX equivalent, key selection criteria include verified 0.55MHz fixed-frequency operation, thermal shutdown at 165°C, undervoltage lockout with 430mV hysteresis, and compatibility with ceramic output capacitors for compact, high-efficiency point-of-load designs.
Technical Context
The LM2832YSDX implements current-mode PWM control with internal compensation, enabling stable regulation across 3.0V–5.5V input and 0.6V–4.5V output ranges without external loop components. Its 0.55MHz oscillator supports small inductors and chip capacitors while maintaining ≥93% peak efficiency at 2.0A load.
It integrates pulse-by-pulse current limiting (2.4A min), soft-start (600µs ramp), overvoltage protection (15% above VFB), and ultra-low shutdown current (30nA). The eMSOP-PowerPAD package uses a dedicated die attach pad for thermal management, requiring connection to system ground but not as primary GND path.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 0.55 MHz - enables use of ≤2.2µH inductors and low-ESR ceramic capacitors for minimal PCB footprint |
| Output Current | 2.0 A - sustained continuous load capability with internal 150 mΩ PMOS switch |
| Input Voltage Range | 3.0 V to 5.5 V - supports direct operation from USB 5V, single-cell Li-ion, or regulated 3.3V/5V rails |
| Feedback Reference | 0.600 V ±2% - sets output voltage via external resistor divider; enables 3.3V @ 2.0A with R1/R2 = 4.5kΩ/10kΩ |
| Quiescent Current | 2.8–4.5 mA (switching) / 30 nA (shutdown) - ensures low no-load power loss and battery-friendly standby mode |
| Thermal Shutdown | 165 °C - protects against sustained overload or poor heatsinking; resumes operation after junction cools to ~150°C |
| UVLO Threshold | 2.73 V (rising) / 2.3 V (falling) with 430 mV hysteresis - prevents erratic startup during brownout or non-monotonic power-up |
Pinout & Package
The LM2832YSDX is housed in an 8-pin eMSOP-PowerPAD package with exposed thermal pad (DAP), optimized for high-power density and thermal performance on standard PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIND | Power Input Supply | Main input voltage rail (3.0–5.5V); connects to input capacitor and must be decoupled near IC |
| VINA | Control Circuitry Supply | Bias supply for internal logic; must be tied directly to VIND on PCB to ensure proper reference stability |
| GND (Pins 3,5,7) | Signal & Power Ground | Primary return path; bottom feedback resistor must connect here to minimize noise coupling into FB node |
| EN | Enable Control Input | Logic-high active enable; must not float or exceed VINA + 0.3V; supports sequencing and power gating |
| FB | Feedback Input | High-impedance node monitoring output voltage via resistor divider; trace must be short and shielded from SW node |
| SW | Switch Node Output | Drives external inductor and catch diode; high dv/dt node requiring tight layout and minimal parasitic inductance |
| DAP | Die Attach Pad | Thermal interface only - soldered to PCB ground plane for heat dissipation but not used as functional GND path |
Key Features
| Feature | Design Value |
|---|---|
| Current-Mode PWM Control | Enables fast transient response and inherent cycle-by-cycle current limiting without external compensation |
| Internal Soft-Start | 600 µs controlled VOUT ramp prevents inrush current and stabilizes startup under heavy load |
| Overvoltage Protection | Shuts down SW when FB exceeds 15% above 0.6V reference, protecting downstream 3.3V logic |
| Thermal Shutdown with Hysteresis | Halts switching at 165°C and resumes only after junction cools to ~150°C, preventing thermal cycling damage |
| Ultra-Low Shutdown Current | 30 nA enables >10-year battery life in always-on USB peripherals using EN-controlled sleep mode |
Applications
| USB-Powered Devices | Set-Top Boxes |
|---|---|
Use Scenario: Powering FPGA I/O banks and microcontroller cores from 5V USB bus in portable media adapters. IC Role / Device Role / Timing Role: Primary step-down regulator converting 5V USB input to stable 3.3V @ 2.0A for logic and interface circuitry. Use Value: Eliminates need for discrete MOSFET + controller; achieves >88% efficiency at full load with <10mm² solution size. | Use Scenario: Generating 3.3V supply for demodulator ASICs and HDMI PHYs in consumer STB mainboard. IC Role / Device Role / Timing Role: Local point-of-load regulator placed adjacent to high-current digital ICs to minimize IR drop and noise coupling. Use Value: Delivers clean 3.3V rail with <1% load regulation and fast transient recovery (<10µs) during burst-mode video decoding. |
| HDD Core Power | DSL Modems |
Use Scenario: Supplying 3.3V to HDD controller SoC and buffer memory during spin-up and data transfer phases. IC Role / Device Role / Timing Role: High-current buck converter handling dynamic 0.5–2.0A loads with thermal robustness across -40°C to +85°C ambient. Use Value: Maintains regulation during 2A inrush without UVLO dropout; thermal shutdown prevents damage during enclosure overheating. | Use Scenario: Providing 3.3V bias to ADSL line driver and DSP in compact wall-mount DSL modems. IC Role / Device Role / Timing Role: Compact, low-noise DC-DC stage replacing linear regulators to reduce heat and improve energy efficiency. Use Value: Reduces board temperature rise by 15°C vs. LDO solution; meets FCC Class B conducted emissions with proper layout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2832YSDE | Same 0.55MHz frequency and 8-pin eMSOP-PowerPAD package; differs only in tape-and-reel packaging (SDX = 3000-unit reel, SDE = 250-unit tray) | Identical electrical and thermal performance; suitable for same PCB layout and thermal design | Select LM2832YSDE for prototyping or low-volume builds where tray packaging simplifies manual assembly |
| TPS62231DRVR | 0.55MHz switching, 2A output, but uses 6-pin WSON package and 0.6V reference; higher quiescent current (17µA shutdown vs. 30nA) | Lacks integrated OVP and thermal shutdown hysteresis; requires external soft-start capacitor for controlled ramp | Choose TPS62231DRVR only if WSON footprint is mandatory and lower shutdown IQ is not required |
Compared with LM2832YSDE, the LM2832YSDX offers identical functionality in reel format for automated production; versus TPS62231DRVR, it provides superior protection features and 1000× lower shutdown current, making it preferred for battery-backed or thermally constrained USB applications.
Availability
LM2832YSDX is available at Aetrix Electronics and suitable for USB-powered devices, set-top boxes, HDD core power, and DSL modems requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for LM2832YSDX 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 leader specializing in analog, embedded processing, and power management ICs, with decades of expertise in high-efficiency DC-DC conversion.
The LM2832 product line delivers compact, high-frequency step-down regulators targeting space-constrained, thermally sensitive applications such as portable electronics and broadband infrastructure equipment.
FAQ
What is the switching frequency of the LM2832YSDX and how does it affect component selection?
The LM2832YSDX operates at a fixed 0.55MHz switching frequency. This allows use of small surface-mount inductors (typically 1.0–2.2µH) and low-ESR ceramic capacitors (≥22µF), reducing total solution size and cost. Higher frequency also improves transient response but increases switching losses slightly compared to lower-frequency alternatives.
Can the LM2832YSDX be used to generate 3.3V from a 5V input, and what resistor values are needed?
Yes - the LM2832YSDX is commonly configured for 3.3V output from 5V input. Using the feedback equation VOUT = 0.6V × (1 + R1/R2), select R2 = 10kΩ and R1 = 45kΩ (standard 1% value) to achieve 3.3V with <1% error. Place R2's ground connection directly at the GND pin to minimize sensing error.
Does the LM2832YSDX require external compensation components for stability?
No - the LM2832YSDX uses internally compensated current-mode control architecture. No external compensation network is required. Stability is ensured across the full operating range (3.0–5.5V input, 0.6–4.5V output, 0–2.0A load) with recommended ceramic output capacitance ≥22µF and ESR <10mΩ.
How does the thermal performance of the LM2832YSDX compare between eMSOP-PowerPAD and WSON packages?
The LM2832YSDX in 8-pin eMSOP-PowerPAD offers θJA = 80°C/W (with 2oz copper, 4-layer board), significantly better than the 6-pin WSON variant (θJA = 115°C/W). The exposed DAP in eMSOP-PowerPAD enables efficient conduction cooling when soldered to a solid ground plane with ≥4 thermal vias, supporting full 2.0A load at +85°C ambient.
What protection features are integrated into the LM2832YSDX?
The LM2832YSDX integrates five key protections: (1) cycle-by-cycle current limit (2.4A min), (2) thermal shutdown at 165°C with ~15°C hysteresis, (3) output overvoltage protection (15% above 0.6V reference), (4) undervoltage lockout (2.73V rising / 2.3V falling), and (5) ultra-low 30nA shutdown current to prevent battery drain. All functions operate autonomously without external components.
LM2832YSDX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 6-WDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 4.5V
- Current - Output:
- 2A
- Frequency - Switching:
- 550kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-WSON (3x3)
LM2832YSDX FAQ
1.How can I place an order for LM2832YSDX through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2832YSDX 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 LM2832YSDX reliable?
The price and inventory of LM2832YSDX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2832YSDX is usually 5 days.
3.What payment methods are accepted for LM2832YSDX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2832YSDX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2832YSDX?
LM2832YSDX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2832YSDX 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 LM2832YSDX?
For technical support, including LM2832YSDX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2832YSDX requirements.
6.How does Aetrix verify that LM2832YSDX is sourced from the original manufacturer or authorized distributors?
All LM2832YSDX 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 LM2832YSDX meets industry standards.
7.What is the process for return or replacement of LM2832YSDX?
All LM2832YSDX units undergo pre-shipment inspection (PSI). If there is an issue with LM2832YSDX, 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 LM2832YSDX part is unused and in its original packaging.
Return procedure for LM2832YSDX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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