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Texas Instruments LM2832YSD/NOPB
- Part No.:
- LM2832YSD/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
LM2832YSD/NOPB.pdf
- Description:
- IC REG BUCK ADJ 2A 6WSON
- Quantity:
- Payment:
- Shipping:
Inventory:2,994
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Product details
Overview
LM2832YSD/NOPB from Texas Instruments is a monolithic, current-mode PWM step-down DC-DC regulator in an 8-pin eMSOP-PowerPAD package, delivering up to 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 LM2832YSD/NOPB datasheet, LM2832YSD/NOPB pinout, LM2832YSD/NOPB application, or LM2832YSD/NOPB equivalent, key selection criteria include its 3.0–5.5V input range, thermal shutdown at 165°C, 30 nA shutdown current, overvoltage protection, and compatibility with ceramic output capacitors for low-ESR, high-frequency operation.
Technical Context
The LM2832YSD/NOPB employs current-mode PWM control with internal compensation, enabling stable regulation across load and line variations without external loop components. Its 550 kHz switching frequency supports compact 1–2.2 µH inductors and 22 µF ceramic output capacitors while maintaining fast transient response.
It integrates undervoltage lockout (UVLO) with 2.73V turn-on and 2.3V turn-off thresholds (430 mV hysteresis), cycle-by-cycle current limiting at 3.25A (typ), and output overvoltage protection triggered at 15% above VREF. The internal 0.6V reference feeds a resistor divider on the FB pin to set output voltage precisely.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0V to 5.5V - supports direct 3.3V/5V rail conversion without pre-regulation. |
| Output Current | 2.0A continuous - sufficient for core power in HDDs, USB-powered devices, and set-top boxes. |
| Switching Frequency | 0.55 MHz - enables use of small surface-mount inductors (e.g., 1.5 µH) and minimizes board area. |
| Feedback Reference | 0.600 V ±2% - sets output voltage via external R1/R2 divider; enables 3.3V @ 2.0A with standard resistor values. |
| PMOS RDS(ON) | 155 mΩ - limits conduction loss at full load; contributes to ≥88% efficiency at 5V→3.3V/1.75A. |
| Quiescent Current | 2.8–4.5 mA (switching), 30 nA (shutdown) - ensures ultra-low standby power in battery-backed systems. |
| Thermal Shutdown | 165°C activation - protects against sustained overload or poor PCB thermal design; recovers at ~150°C. |
Pinout & Package
The LM2832YSD/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 path for 3.0–5.5V; connects directly to input capacitor and must be decoupled locally. |
| VINA | Control circuitry supply | Bias rail for internal logic; must be tied to VIND on PCB-no separate filtering required. |
| GND (Pins 3,5,7) | Signal & power ground | Primary return for feedback network, SW node discharge path, and thermal pad anchor point. |
| EN | Enable control input | Active-high logic interface; <2.9V disables regulator with 30 nA quiescent current; must not float. |
| FB | Feedback sensing node | High-impedance (≤100 nA bias) input monitoring output voltage via R1/R2 divider; trace must be short and noise-shielded. |
| SW | Switch node output | Drives external inductor and catch diode; experiences full VIN-to-GND swing; requires tight layout to minimize EMI. |
| DAP | Die attach pad | Thermal interface only-must be soldered to solid GND plane with ≥4 thermal vias; not a functional signal pin. |
Key Features
| Feature | Design Value |
|---|---|
| Internal soft-start | Ramps reference voltage over ~600 µs to limit inrush current during startup-eliminates need for external timing components. |
| Current-mode PWM control | Enables inherent cycle-by-cycle current limiting and stable operation with minimal external compensation. |
| Overvoltage protection | Shuts off internal PMOS when FB exceeds 15% above 0.6V-prevents damage to downstream 3.3V logic during fault conditions. |
| Thermal shutdown with hysteresis | Halts switching at 165°C and resumes only after junction cools to ~150°C-avoids thermal oscillation under overload. |
| Ultra-low shutdown current | 30 nA enables >10-year battery life in always-on monitoring circuits powered by coin cells or supercaps. |
Applications
| Local 5V to Vcore Step-Down Converters | Core Power in HDDs |
|---|---|
Use Scenario: Converting 5V SATA bus power to regulated 3.3V for HDD controller ICs and motor drivers in compact storage enclosures. IC Role / Device Role / Timing Role: Primary buck regulator providing stable 2.0A output with fast load-step response to handle bursty disk access currents. Use Value: Enables single-rail 5V system design without discrete LDO post-regulation; 550 kHz switching avoids audible noise in consumer HDDs. | Use Scenario: Supplying clean 3.3V power to spindle motor controllers and servo electronics in 2.5-inch laptop HDDs where board space is constrained. IC Role / Device Role / Timing Role: High-efficiency DC-DC converter operating in ambient temperatures up to +125°C junction, supporting continuous duty cycles. Use Value: 155 mΩ RDS(ON) and internal compensation reduce BOM count by 3–4 passive components versus discrete solutions. |
| Set-Top Boxes | USB Powered Devices |
Use Scenario: Generating 3.3V for demodulator SoCs and HDMI PHYs in cost-sensitive, thermally limited STB designs using 5V wall adapters. IC Role / Device Role / Timing Role: Main system power regulator with EN pin controlled by microcontroller for power sequencing and standby mode entry. Use Value: 30 nA shutdown current meets Energy Star standby requirements; 0.55 MHz frequency avoids interference with video clock harmonics. | Use Scenario: Powering portable USB peripherals (e.g., hubs, DACs, webcams) drawing up to 2.0A from 5V USB-C or legacy USB-A ports. IC Role / Device Role / Timing Role: Compact, self-contained buck converter with integrated switch and protection-no external MOSFET or driver needed. Use Value: eMSOP-PowerPAD package allows ≤120 mm² total solution size including inductor and capacitors-fits inside slim USB device housings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2832XSD/NOPB | 1.6 MHz switching frequency, higher DMAX (94%), slightly lower RDS(ON) (150 mΩ) | Better suited for ultra-compact layouts needing smallest possible inductors (<1 µH); higher frequency increases switching loss at >1.5A. | Select when board area is critical and load is typically <1.5A; verify thermal margin with θJA = 80°C/W. |
| TPS62231DRVR | 3 MHz fixed frequency, 1.8A max output, 2.05V–6.0V input, 12 µA quiescent current in PWM mode | Lower IQ improves light-load efficiency; lacks OVP and UVLO hysteresis; uses different pinout (no separate VINA). | Prefer for battery-powered USB devices prioritizing >90% efficiency at 10–100 mA loads; not drop-in due to pin mismatch and missing protections. |
Compared with LM2832XSD/NOPB, the LM2832YSD/NOPB trades higher-frequency capability for improved heavy-load efficiency and simpler magnetics selection; versus TPS62231DRVR, it offers stronger fault protection and higher current but at the cost of higher light-load quiescent current.
Availability
LM2832YSD/NOPB is available at Aetrix Electronics and suitable for local 5V-to-3.3V conversion, HDD core power delivery, and USB-powered device designs requiring stable component supply, consistent parametric performance, and long-term industrial availability.
Supply support for LM2832YSD/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 ICs, with decades of expertise in high-efficiency DC-DC conversion.
The LM2832 product line delivers monolithic, high-frequency buck regulators optimized for space-constrained, medium-current applications such as consumer electronics, storage subsystems, and USB-powered peripherals-emphasizing integration, thermal robustness, and ease of use.
FAQ
What is the recommended input capacitor for LM2832YSD/NOPB?
The LM2832YSD/NOPB datasheet specifies a minimum 22 µF input capacitor with low ESL, such as X7R/X5R multilayer ceramic (MLCC). This value ensures stable operation at 550 kHz switching frequency and prevents excessive VIN droop during high di/dt transients. MLCCs are strongly preferred over tantalum or electrolytic types due to their superior high-frequency impedance characteristics and reliability under DC bias.
Does LM2832YSD/NOPB require external compensation components?
No, LM2832YSD/NOPB does not require external compensation components. It features fully internal compensation designed for current-mode PWM control, enabling stable regulation across the full 3.0–5.5V input range and 0.6–4.5V output range with only the feedback resistor divider. This eliminates the need for external Type-II or Type-III compensation networks, simplifying layout and reducing BOM count.
Can LM2832YSD/NOPB operate with a 3.3V input to generate 3.3V output?
No, LM2832YSD/NOPB cannot regulate 3.3V output from a 3.3V input because it is a step-down (buck) converter requiring VIN > VOUT + VD + IOUT × RDS(ON). With typical diode drop (~0.45V) and RDS(ON) (~155 mΩ), minimum viable input is approximately 3.9V. For 3.3V-in/3.3V-out applications, a low-dropout linear regulator or buck-boost topology is required instead.
What is the purpose of the VINA pin on LM2832YSD/NOPB?
The VINA pin on LM2832YSD/NOPB supplies bias voltage to the internal control circuitry-including error amplifier, oscillator, and logic blocks-and must be connected directly to VIND on the PCB. Unlike VIND, VINA is not a high-current path; it draws only microamps and requires no separate decoupling. This dual-supply architecture isolates sensitive analog circuitry from power-switching noise on VIND.
How does the overvoltage protection (OVP) function in LM2832YSD/NOPB?
The LM2832YSD/NOPB OVP circuit continuously compares the FB pin voltage to a threshold set at 15% above the 0.6V internal reference (i.e., ~0.69V). If this threshold is exceeded-due to feedback resistor failure, open R2, or sudden load removal-the internal PMOS switch is immediately disabled, allowing the output to discharge through the catch diode and load. Regulation resumes automatically once FB falls below threshold, providing self-recovering fault protection without latch-up.
LM2832YSD/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 6-WDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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)
LM2832YSD/NOPB FAQ
1.How can I place an order for LM2832YSD/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2832YSD/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 LM2832YSD/NOPB reliable?
The price and inventory of LM2832YSD/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2832YSD/NOPB is usually 5 days.
3.What payment methods are accepted for LM2832YSD/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2832YSD/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2832YSD/NOPB?
LM2832YSD/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2832YSD/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 LM2832YSD/NOPB?
For technical support, including LM2832YSD/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2832YSD/NOPB requirements.
6.How does Aetrix verify that LM2832YSD/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2832YSD/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 LM2832YSD/NOPB meets industry standards.
7.What is the process for return or replacement of LM2832YSD/NOPB?
All LM2832YSD/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2832YSD/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 LM2832YSD/NOPB part is unused and in its original packaging.
Return procedure for LM2832YSD/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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