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Texas Instruments LM2832YMYX
- Part No.:
- LM2832YMYX
- Manufacturer:
- Texas Instruments
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LM2832YMYX.pdf
- Description:
- IC REG BUCK ADJ 2A 8HVSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,359
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Product details
Overview
LM2832YMYX from Texas Instruments is a monolithic, current-mode PWM step-down DC-DC regulator in an 8-pin eMSOP-PowerPAD package, delivering 2.0A output at 3.3V from a 5V input. It integrates a 150 mΩ PMOS switch, features 0.6V ±2% internal reference, 550 kHz fixed switching frequency, and internal soft-start for controlled startup in space-constrained power rails.
For engineers reviewing the LM2832YMYX datasheet, LM2832YMYX pinout, LM2832YMYX application, or LM2832YMYX equivalent, this page provides verified pin functions, thermal design guidance, load regulation behavior at 3.3V/2.0A, and validated alternative options for local core voltage conversion in USB-powered devices and set-top boxes.
Technical Context
The LM2832YMYX employs constant-frequency current-mode control with internal compensation, enabling stable regulation across 3.0V–5.5V input and 0.6V–4.5V output ranges. Its 550 kHz switching frequency supports compact external components while maintaining >90% efficiency at full load.
It integrates undervoltage lockout (UVLO) with 2.73V turn-on and 430 mV hysteresis, cycle-by-cycle current limiting (typ. 3.25A), thermal shutdown at 165°C, and output overvoltage protection triggered at 15% above VFB.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0V to 5.5V - supports direct connection to USB 5V or single-cell Li-ion battery rails without pre-regulation. |
| Output Voltage Accuracy | 0.6V ±2% - enables precise 3.3V regulation with <±66 mV error at 25°C, critical for FPGA I/O and microcontroller core supplies. |
| Switching Frequency | 0.55 MHz - allows use of ≤2.2 µH shielded inductors and 22 µF ceramic output capacitors in <100 mm² PCB area. |
| Max Output Current | 2.0A continuous - sustains full load under worst-case junction temperature (125°C) with proper thermal vias to ground plane. |
| Internal PMOS RDS(ON) | 155 mΩ - limits conduction loss to ≤306 mW at 2.0A/3.3V output, enabling >88% efficiency per TI application data. |
| Quiescent Current | 2.5 mA (switching), 30 nA (shutdown) - ensures low standby power in always-on USB peripherals and portable modems. |
| Thermal Shutdown | 165°C with 15°C hysteresis - protects against sustained overload or poor heatsinking without requiring external monitoring circuitry. |
Pinout & Package
LM2832YMYX uses the 8-pin eMSOP-PowerPAD package (4.9 mm × 6.0 mm × 1.0 mm), featuring an exposed die attach pad (DAP) soldered to PCB ground for low thermal impedance (θJC = 18°C/W). The DAP is not a primary GND terminal but must be connected to system ground via ≥4 thermal vias.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIND) | Power input supply | Main VIN path for high-current switching node; requires low-ESL 22 µF input capacitor placed adjacent to this pin. |
| 2 (VINA) | Control circuitry supply | Bias rail for internal logic; must be tied directly to VIND on PCB to avoid noise coupling into feedback loop. |
| 3,5,7 (GND) | Signal and power ground | Three dedicated GND pins minimize ground bounce; bottom resistor of FB divider must connect nearest to Pin 3. |
| 4 (EN) | Enable control input | Active-high logic interface; floating or >VINA+0.3V causes undefined operation; 0.4V threshold enables clean sequencing with MCU GPIO. |
| 6 (FB) | Feedback input | High-impedance (≤100 nA bias) node sensing output voltage via resistor divider; trace must be short and远离SW routing. |
| 8 (SW) | Switch node output | Drives external inductor and catch diode; high dv/dt node requiring tight layout to minimize EMI and ringing. |
Key Features
| Feature | Design Value |
|---|---|
| Internal soft-start | Ramps reference voltage over ~600 µs to limit inrush current during power-up, preventing input rail collapse in shared-supply systems. |
| Current-mode PWM control | Enables fast transient response (<10 µs recovery from 50% load step) and inherent cycle-by-cycle current limiting without external sense resistors. |
| Overvoltage protection | Shuts down SW when FB exceeds 0.69V (15% above 0.6V reference), protecting downstream 3.3V logic from fault-induced overvoltage. |
| Thermal shutdown with hysteresis | Halts switching at 165°C and resumes only after junction cools to ~150°C, preventing thermal runaway during sustained overload or airflow loss. |
| Ultra-low shutdown current | 30 nA enables >10-year battery life in maintenance-free USB-powered sensors when EN is pulled low. |
Applications
| Local 5V-to-3.3V Core Supply | USB-Powered Peripheral Rail |
|---|---|
Use Scenario: Powering ARM Cortex-M4 microcontroller cores and I/O banks from a host USB port in embedded test equipment. IC Role / Device Role / Timing Role: Primary buck regulator providing regulated 3.3V/2.0A with fast load transient response to handle CPU burst activity. Use Value: Eliminates need for external current-sense resistor or compensation network due to internal current-mode control and fixed 550 kHz frequency. | Use Scenario: Generating stable 3.3V rail for Wi-Fi module and USB transceiver in portable diagnostic dongles. IC Role / Device Role / Timing Role: Compact, thermally robust DC-DC converter operating from unregulated 4.75–5.25V USB VBUS with <100 mV line regulation. Use Value: 30 nA shutdown current extends battery backup runtime during host disconnect; eMSOP-PowerPAD enables 2-layer PCB layout with minimal thermal relief. |
| HDD Preamp & Servo Power | Set-Top Box SoC Core Rail |
Use Scenario: Supplying analog front-end and servo motor drivers in 2.5-inch HDD enclosures with strict EMI limits. IC Role / Device Role / Timing Role: High-frequency buck regulator minimizing conducted noise into sensitive analog signal paths via 550 kHz fixed switching. Use Value: Internal 155 mΩ PMOS switch and optimized gate drive reduce switching node ringing, easing FCC Class B compliance. | Use Scenario: Delivering 3.3V/2.0A to media processor SoC in consumer set-top boxes with ambient temperatures up to 70°C. IC Role / Device Role / Timing Role: Thermally efficient step-down regulator using DAP-to-ground vias to maintain <125°C junction under continuous load. Use Value: 88% typical efficiency at 5V→3.3V/2.0A reduces heat sink requirements and enables fanless enclosure design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRVR | 3 MHz switching frequency, 1.8V–6.5V input, 0.6V reference, 0.9A max output | Lower current rating; suited for sub-1A logic rails, not 2.0A core supplies | Select when board space is more constrained than current demand and higher frequency allows smaller passives. |
| MP2307DN-LF-Z | 340 kHz switching, 4.75V–23V input, 0.8V reference, 3A output, SOIC-8 package | Wider input range and higher current, but larger footprint and lower efficiency at 5V→3.3V | Choose for industrial 12V input systems where 550 kHz EMI filtering is less critical than input voltage flexibility. |
Compared with TPS62231DRVR and MP2307DN-LF-Z, LM2832YMYX offers optimal balance of 2.0A capability, 550 kHz frequency, and eMSOP-PowerPAD thermal performance specifically for 5V-input USB and consumer electronics applications-without requiring layout changes for lower-current or higher-voltage alternatives.
Availability
LM2832YMYX is available at Aetrix Electronics and suitable for USB-powered devices, set-top box SoC core supplies, and HDD preamp power rails requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for LM2832YMYX 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, thermally optimized step-down regulators for space- and efficiency-critical applications such as portable electronics, storage subsystems, and consumer multimedia devices.
FAQ
What is the recommended input capacitor for LM2832YMYX in a 5V-to-3.3V/2.0A application?
The LM2832YMYX datasheet specifies a 22 µF low-ESL ceramic input capacitor rated for ≥6.3V, placed adjacent to the VIND and GND pins. X7R or X5R MLCCs are preferred for stable capacitance across temperature and bias; leaded or high-ESL tantalum capacitors are unsuitable due to impedance rise at 550 kHz.
Does LM2832YMYX require external compensation components?
No, LM2832YMYX uses internal compensation optimized for current-mode control. No external RC networks or type-II/type-III compensators are needed-only the FB resistor divider, input/output capacitors, inductor, and catch diode are required for full operation per TI's typical application circuit.
How does the EN pin function on LM2832YMYX, and what is its threshold voltage?
The EN pin on LM2832YMYX is an active-high enable input with a 0.4V typical threshold. Pulling EN ≥1.8V enables regulation; pulling EN ≤0.4V places LM2832YMYX in ultra-low-power shutdown (30 nA). The pin must never float or exceed VINA + 0.3V to prevent latch-up or damage.
What thermal design practices are essential for reliable 2.0A operation of LM2832YMYX?
For continuous 2.0A output, LM2832YMYX requires the eMSOP-PowerPAD's DAP to be soldered to a solid PCB ground plane with ≥4 thermal vias (0.3 mm diameter) connecting to inner-layer ground. Board layout must minimize SW node loop area and place input/output capacitors within 3 mm of respective pins to limit θJA to ≤80°C/W.
Can LM2832YMYX be used to generate 1.8V output, and what is the minimum achievable output voltage?
Yes, LM2832YMYX supports output voltages from 0.6V to 4.5V via FB resistor divider. For 1.8V output, use R1 = 200 kΩ and R2 = 100 kΩ (VOUT = 0.6V × (1 + R1/R2)). The 0.6V internal reference sets the absolute minimum; no external reference or mode pin is needed to reach 0.6V.
LM2832YMYX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) 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:
- 8-HVSSOP
LM2832YMYX FAQ
1.How can I place an order for LM2832YMYX through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2832YMYX 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 LM2832YMYX reliable?
The price and inventory of LM2832YMYX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2832YMYX is usually 5 days.
3.What payment methods are accepted for LM2832YMYX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2832YMYX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2832YMYX?
LM2832YMYX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2832YMYX 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 LM2832YMYX?
For technical support, including LM2832YMYX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2832YMYX requirements.
6.How does Aetrix verify that LM2832YMYX is sourced from the original manufacturer or authorized distributors?
All LM2832YMYX 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 LM2832YMYX meets industry standards.
7.What is the process for return or replacement of LM2832YMYX?
All LM2832YMYX units undergo pre-shipment inspection (PSI). If there is an issue with LM2832YMYX, 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 LM2832YMYX part is unused and in its original packaging.
Return procedure for LM2832YMYX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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