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Texas Instruments LM2832YMYX/NOPB
- Part No.:
- LM2832YMYX/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LM2832YMYX/NOPB.pdf
- Description:
- IC REG BUCK ADJ 2A 8HVSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,575
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Product details
Overview
LM2832YMYX/NOPB 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 operates across 3.0V–5.5V input range for compact local power conversion in space-constrained embedded systems.
For engineers reviewing the LM2832YMYX/NOPB datasheet, LM2832YMYX/NOPB pinout, LM2832YMYX/NOPB application, or LM2832YMYX/NOPB equivalent, key selection considerations include its 550 kHz switching frequency (enabling small external inductors), thermal shutdown at 165°C, 30 nA shutdown current, internal soft-start, and output overvoltage protection-critical for reliable core voltage regulation in USB-powered devices and set-top boxes.
Technical Context
The LM2832YMYX/NOPB implements constant-frequency current-mode PWM control with internal compensation, enabling stable regulation without external loop components. Its 550 kHz oscillator supports fast transient response while maintaining high efficiency (up to 93%) across 3.0V–5.5V input and 0.6V–4.5V output ranges.
It uses cycle-by-cycle current limiting (typ. 3.25A) and thermal shutdown (165°C trip, ~150°C recovery) for robust overload protection. The 0.6V feedback reference and 2% tolerance enable precise output voltage setting via external resistor divider, with line regulation of 0.02%/V and feedback bias current ≤100 nA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0V to 5.5V - supports direct connection to standard USB 5V rails and single-cell Li-ion battery systems. |
| Output Current | 2.0A continuous - sufficient for powering microcontrollers, FPGAs, and interface ICs in portable electronics. |
| Switching Frequency | 550 kHz - enables use of sub-2.2 µH inductors and low-ESR ceramic capacitors, minimizing PCB footprint. |
| Feedback Reference | 0.600 V ±2% - sets output voltage accuracy; allows 3.3V output using R1=33.2kΩ, R2=10kΩ divider. |
| Quiescent Current | 2.8–4.5 mA (switching), 30 nA (shutdown) - ensures ultra-low standby power in always-on applications. |
| Thermal Shutdown | 165°C junction temperature - protects against sustained overload or poor heatsinking in enclosed designs. |
| PMOS Switch RDS(ON) | 155 mΩ - limits conduction loss to ~306 mW at 1.75A/3.3V output, supporting >88% efficiency. |
Pinout & Package
LM2832YMYX/NOPB is housed in an 8-pin eMSOP-PowerPAD package with exposed thermal pad (DAP) requiring solder connection to PCB ground plane for optimal thermal performance (θJA = 80°C/W, θJC = 18°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIND | Power input supply | Main input voltage path; connects to bulk input capacitor and must be decoupled near the pin. |
| VINA | Control circuitry supply | Bias rail for internal logic; must be tied directly to VIND on PCB to avoid noise coupling. |
| EN | Enable control input | Active-high logic input; requires ≥1.8V to enable, ≤0.4V to shut down; must not float or exceed VINA + 0.3V. |
| GND (pins 3,5,7) | Signal and power ground | Primary return path; bottom feedback resistor must connect here to minimize noise injection into FB node. |
| FB | Feedback input | High-impedance (≤100 nA bias) node monitoring output voltage via resistor divider; trace must be short and shielded. |
| SW | Switch node | Drives external inductor and catch diode; carries high di/dt; requires minimal trace length and tight loop area. |
| DAP | Die attach pad | Thermal interface only; must be soldered to solid ground plane with ≥4 thermal vias-cannot serve as primary GND return. |
Key Features
| Feature | Design Value |
|---|---|
| Internal soft-start | Ramps reference voltage over ~600 µs to limit inrush current during startup-prevents input rail sag and output overshoot. |
| Output overvoltage protection | Shuts off PMOS switch when FB exceeds 15% above 0.6V reference-protects downstream loads from catastrophic failure. |
| Undervoltage lockout | Enables operation only above 2.73V (typ.) with 430 mV hysteresis-ensures clean startup and prevents brownout oscillation. |
| Current-mode PWM control | Provides inherent cycle-by-cycle current limiting and simplified loop compensation-eliminates need for external compensation network. |
| Ultra-low shutdown current | 30 nA maximum-enables multi-year battery life in IoT sensors and always-on USB peripherals. |
Applications
| Local 5V to Vcore Step-Down Converters | Core Power in HDDs |
|---|---|
Use Scenario: Converting 5V USB or SATA power to 3.3V or 1.8V for microcontroller cores and memory interfaces in compact embedded controllers. IC Role / Device Role / Timing Role: Primary buck regulator providing regulated Vcore with fast load-transient response and tight DC accuracy. Use Value: Enables single-rail 5V system design with no external LDO required; 550 kHz switching allows <2.2 µH inductors and eliminates bulky electrolytics. | Use Scenario: Supplying stable 3.3V/2.0A to spindle motor drivers and servo control ICs in 2.5-inch hard disk drives with strict thermal envelope constraints. IC Role / Device Role / Timing Role: High-efficiency point-of-load converter mounted adjacent to motor driver ICs to minimize IR drop and noise coupling. Use Value: 155 mΩ RDS(ON) and 88% typical efficiency reduce junction temperature rise; thermal shutdown prevents drive failure during stall conditions. |
| Set-Top Boxes | USB Powered Devices |
Use Scenario: Generating 3.3V for demodulator SoCs and HDMI PHYs in consumer STBs where EMI compliance and board area are critical. IC Role / Device Role / Timing Role: Main DC/DC converter operating at fixed 550 kHz to simplify EMI filter design and avoid AM band interference. Use Value: Internal compensation and 30ns minimum on-time support stable 3.3V output even at 5V input-no external compensation needed. | Use Scenario: Powering portable media players, Bluetooth headsets, and USB-C accessories drawing up to 2A from host-supplied 5V bus. IC Role / Device Role / Timing Role: Primary step-down regulator with ultra-low 30 nA shutdown current to extend battery backup time during USB suspend. Use Value: Enables true "zero-power" standby mode; internal soft-start prevents USB enumeration failures due to inrush current. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2832XMYX/NOPB | 1.6 MHz switching frequency, higher quiescent current (3.3–5 mA), same 2.0A rating and 0.6V reference. | Better suited for ultra-compact layouts requiring smallest possible inductors (<1 µH); higher switching loss reduces efficiency at full load. | Select when board area is more critical than peak efficiency or thermal margin. |
| TPS62231DRVR | 3 MHz switching, 2A output, 0.6V reference, but uses external compensation and lacks OVP/UVLO hysteresis. | Requires additional loop compensation components; no integrated overvoltage protection-needs external circuitry for safety-critical loads. | Select only if higher frequency is mandatory and external protection can be added; not drop-in compatible. |
Compared with LM2832YMYX/NOPB, the LM2832XMYX/NOPB trades efficiency for smaller magnetics, while the TPS62231DRVR offers higher frequency but sacrifices integration-requiring external compensation and lacking built-in OVP, making LM2832YMYX/NOPB the optimal balance of size, protection, and ease of use for USB and STB applications.
Availability
LM2832YMYX/NOPB is available at Aetrix Electronics and suitable for local 5V-to-3.3V conversion, core power in HDDs, and USB-powered device designs requiring stable component supply, consistent parametric performance, and long-term industrial availability.
Supply support for LM2832YMYX/NOPB 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 technologies, with decades of expertise in high-efficiency DC-DC conversion.
The LM2832 product line was designed specifically for space-constrained, high-current point-of-load applications in consumer, computing, and industrial electronics-emphasizing integration, thermal robustness, and ease of layout.
FAQ
What is the switching frequency of the LM2832YMYX/NOPB?
The LM2832YMYX/NOPB has a fixed internal switching frequency of 550 kHz. This value is factory-trimmed and does not require external components to set. It enables use of small surface-mount inductors (e.g., 1.5 µH) and ceramic output capacitors while maintaining high efficiency-verified across −40°C to +125°C junction temperature range per the SNVS455A datasheet.
Does the LM2832YMYX/NOPB require external compensation components?
No, the LM2832YMYX/NOPB uses internally compensated current-mode control architecture. No external compensation network (e.g., RC network on COMP pin) is needed-unlike many competing regulators. This simplifies design, reduces BOM count, and improves consistency across production units, as confirmed in the Applications Information section of the official TI datasheet.
What is the maximum output voltage that can be set with the LM2832YMYX/NOPB?
The LM2832YMYX/NOPB supports output voltages from 0.6V to 4.5V, set by an external resistor divider on the FB pin. The upper limit is constrained by the absolute maximum SW pin voltage (7V) and practical stability margins. For example, a 4.5V output requires R1/R2 ≈ 6.5, verified in TI's typical application circuits and electrical characteristics tables.
How does the LM2832YMYX/NOPB handle overcurrent conditions?
The LM2832YMYX/NOPB employs cycle-by-cycle current limiting with a typical threshold of 3.25A. During each switching cycle, the internal current sense amplifier monitors switch current; if it exceeds the limit, the PMOS switch turns off immediately until the next cycle. This protects both the IC and external components during short-circuit or overload events-detailed in the Current Limit section of the SNVS455A datasheet.
Can the LM2832YMYX/NOPB operate with a 3.3V input to generate 3.3V output?
No-the LM2832YMYX/NOPB is a step-down (buck) regulator and cannot achieve unity-gain or boost operation. With a 3.3V input, the maximum achievable output is limited by dropout: VOUT ≤ VIN − IOUT × RDS(ON) − VD. At 2A, this yields ~2.8V max. For 3.3V-out from 3.3V-in, a low-dropout linear regulator or buck-boost topology is required instead of the LM2832YMYX/NOPB.
LM2832YMYX/NOPB 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/NOPB FAQ
1.How can I place an order for LM2832YMYX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2832YMYX/NOPB 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/NOPB reliable?
The price and inventory of LM2832YMYX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2832YMYX/NOPB is usually 5 days.
3.What payment methods are accepted for LM2832YMYX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2832YMYX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2832YMYX/NOPB?
LM2832YMYX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2832YMYX/NOPB 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/NOPB?
For technical support, including LM2832YMYX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2832YMYX/NOPB requirements.
6.How does Aetrix verify that LM2832YMYX/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2832YMYX/NOPB 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/NOPB meets industry standards.
7.What is the process for return or replacement of LM2832YMYX/NOPB?
All LM2832YMYX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2832YMYX/NOPB, 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/NOPB part is unused and in its original packaging.
Return procedure for LM2832YMYX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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