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Texas Instruments LM2832YMY/NOPB
- Part No.:
- LM2832YMY/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LM2832YMY/NOPB.pdf
- Description:
- IC REG BUCK ADJ 2A 8HVSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,115
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Product details
Overview
LM2832YMY/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 LM2832YMY/NOPB datasheet, LM2832YMY/NOPB pinout, LM2832YMY/NOPB application, or LM2832YMY/NOPB equivalent, key selection criteria include its 3.0–5.5V input range, thermal shutdown (165°C), overvoltage protection, ultra-low 30 nA shutdown current, and compatibility with ceramic output capacitors for high-frequency transient response in USB-powered and set-top box designs.
Technical Context
The LM2832YMY/NOPB implements constant-frequency 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 µH inductors and low-ESR ceramic capacitors while maintaining >93% peak efficiency at 2A/3.3V output.
It uses cycle-by-cycle current limiting (typ. 3.25A), undervoltage lockout (UVLO rising threshold 2.73V, hysteresis 430 mV), and internal soft-start (600 µs ramp) to ensure robust start-up and fault recovery. The feedback pin senses output voltage via resistor divider referenced to the 0.6V internal reference, with bias current <100 nA for minimal divider error.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0V to 5.5V - supports direct connection to USB 5V or regulated 3.3V/5V system rails without pre-regulation. |
| Output Voltage Accuracy | 0.6V ±2% - enables precise 3.3V output setting with <±33 mV tolerance using standard 1% feedback resistors. |
| Max Output Current | 2.0A - delivers full rated load with thermal shutdown activation only above 165°C junction temperature. |
| Switching Frequency | 550 kHz - allows use of sub-2.2 µH shielded inductors and 22 µF X7R MLCCs for minimal board area. |
| Quiescent Current | 2.8–4.5 mA (switching), 30 nA (shutdown) - enables battery-backed standby operation with negligible drain. |
| Internal Switch RDS(ON) | 155 mΩ - limits conduction loss to ~306 mW at 1.75A/3.3V, supporting >88% efficiency in typical applications. |
| Thermal Shutdown Threshold | 165°C - protects against sustained overload or poor PCB thermal design while allowing operation up to +125°C ambient. |
Pinout & Package
Package: 8-pin eMSOP-PowerPAD (exposed thermal pad), 3.0 mm × 3.0 mm × 1.0 mm body, 0.65 mm pitch. Thermal pad must be soldered to PCB ground plane for effective heat dissipation (θJA = 80°C/W, θJC = 18°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIND | Power input supply | Main input path for high-current switching node; requires local 22 µF ceramic capacitor with low ESL. |
| VINA | Control circuitry supply | Bias rail for internal logic; must be tied directly to VIND on PCB to avoid noise coupling into feedback path. |
| EN | Enable control input | Active-high logic interface; floating or >VINA+0.3V violates absolute max rating - requires pull-down or MCU GPIO. |
| GND (Pins 3,5,7) | Signal & power ground | Primary return for feedback divider, catch diode, and input/output capacitors; multiple pins reduce ground impedance. |
| FB | Feedback input | High-impedance (≤100 nA bias) node sensing output voltage via resistor divider; trace must be short and远离SW node. |
| SW | Switch node | Drives external inductor and catch diode; high dv/dt node requiring tight layout and minimum copper area to reduce EMI. |
| DAP | Die attach pad | Thermal interface only - must be connected to solid ground plane via ≥4 thermal vias; not electrically functional as GND. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 550 kHz switching frequency | Enables predictable EMI filtering and eliminates need for external frequency-setting components. |
| Internal 0.6V reference with ±2% tolerance | Reduces output voltage error budget and simplifies feedback network design for 3.3V/2.5V/1.8V rails. |
| Integrated 155 mΩ PMOS switch | Eliminates external high-side MOSFET and gate driver, reducing BOM count and layout complexity. |
| Internal soft-start (600 µs) | Prevents inrush current into output capacitors during power-up, avoiding input rail droop or reset glitches. |
| Output overvoltage protection (OVP) | Shuts down SW when FB exceeds 15% above 0.6V, protecting downstream 3.3V logic from catastrophic overvoltage. |
Applications
| USB Powered Devices | Set-Top Boxes |
|---|---|
Use Scenario: Powering HDMI interface ICs, USB PHYs, and microcontrollers from a single 5V USB port in portable media adapters. IC Role / Device Role / Timing Role: Primary 3.3V point-of-load regulator converting USB 5V to clean, low-noise 3.3V for digital logic and I/O buffers. Use Value: Delivers full 2.0A at 3.3V with <1% load regulation and fast transient response to handle burst data traffic without brownout. | Use Scenario: Supplying core logic and tuner subsystems in consumer-grade cable/satellite receivers with strict thermal and size constraints. IC Role / Device Role / Timing Role: High-efficiency buck converter for FPGA configuration voltage and demodulator analog front-end bias rails. Use Value: Achieves >88% efficiency at 1.75A/3.3V while fitting within 9 mm² footprint, reducing heatsink requirements and system cost. |
| Local 5V to Vcore Step-Down | Core Power in HDDs |
Use Scenario: Generating processor I/O voltage (e.g., 3.3V) from main 5V rail in embedded controllers and industrial gateways. IC Role / Device Role / Timing Role: Compact, self-contained DC-DC solution replacing discrete buck controller + MOSFET combinations. Use Value: Integrates all active functions in one 8-pin package with no external compensation needed - reduces design cycle time by ≥3 weeks. | Use Scenario: Providing regulated 3.3V to HDD servo controllers and interface ASICs in external storage enclosures. IC Role / Device Role / Timing Role: High-reliability power stage meeting shock/vibration and thermal cycling requirements of rotating media systems. Use Value: Withstands -40°C to +125°C junction temperature range and includes thermal shutdown + OVP for fail-safe operation during mechanical stress events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2832XMY/NOPB | 1.6 MHz switching frequency, higher quiescent current (3.3–5 mA), same 2A capability and package. | Better suited for ultra-compact layouts needing smallest possible inductors (<1 µH), but lower light-load efficiency. | Select when board area is constrained more than efficiency or EMI; verify inductor DCR and saturation current at 1.6 MHz. |
| TPS62231DRVR | 3 MHz fixed frequency, 0.6V reference, 2A output, 2.05–6.5V input, smaller 2-mm × 2-mm WSON-6 package. | Higher input voltage range and smaller footprint, but lacks integrated OVP and has different enable polarity (active-low). | Choose for newer designs prioritizing miniaturization and wider VIN; requires redesign of feedback and enable circuitry. |
Compared with LM2832XMY/NOPB, the LM2832YMY/NOPB trades higher-frequency EMI for improved light-load efficiency and relaxed inductor selection; versus TPS62231DRVR, it offers stronger protection features and proven thermal performance in legacy 8-pin eMSOP layouts, at the cost of slightly larger footprint.
Availability
LM2832YMY/NOPB is available at Aetrix Electronics and suitable for USB-powered devices, set-top boxes, local 5V-to-3.3V conversion, and HDD core power applications requiring stable component supply, long-term manufacturability, and TI-qualified automotive/industrial grade reliability.
Supply support for LM2832YMY/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 and industrial-grade reliability.
The LM2832 product line was designed specifically for space-constrained, high-current point-of-load applications in consumer electronics and computing peripherals, emphasizing integration, thermal robustness, and ease of use without external compensation.
FAQ
What is the recommended input capacitor for LM2832YMY/NOPB?
The LM2832YMY/NOPB datasheet specifies a 22 µF ceramic input capacitor with low ESL, placed as close as possible to the VIND and GND pins. X7R or X5R dielectrics are preferred for stable capacitance across temperature and bias voltage. The capacitor must support RMS current up to ~1.25A at 550 kHz and withstand 7V absolute maximum rating.
Does LM2832YMY/NOPB require external compensation components?
No, the LM2832YMY/NOPB uses internally compensated current-mode control architecture. No external compensation network is required - only the feedback resistor divider (R1/R2) and basic input/output capacitors are needed for stable operation across its full 3.0–5.5V input and 0.6–4.5V output range.
Can LM2832YMY/NOPB operate with a 3.3V input to generate 3.3V output?
No - the LM2832YMY/NOPB is a buck (step-down) regulator only. With a 3.3V input, the minimum achievable output is limited by dropout voltage: VOUT ≤ VIN − IOUT × RDS(ON). At 2A, dropout is ~300 mV, so 3.3V output is unattainable from 3.3V input. Use a low-dropout linear regulator or buck-boost topology instead.
What is the purpose of the DAP (Die Attach Pad) on LM2832YMY/NOPB?
The DAP on LM2832YMY/NOPB is a thermally conductive exposed pad that must be soldered to a PCB ground plane using ≥4 thermal vias. It provides the primary thermal path from die to board (θJC = 18°C/W), but is not electrically connected to internal circuitry - it cannot serve as a functional GND return path for signals or power.
How does the enable (EN) pin function on LM2832YMY/NOPB?
The EN pin on LM2832YMY/NOPB is an active-high logic input: applying ≥1.8V enables regulation, while ≤0.4V disables the device and reduces quiescent current to 30 nA. The pin must never float or exceed VINA + 0.3V; a 100 kΩ pull-down resistor is recommended for default-off behavior during power-up sequencing.
LM2832YMY/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:
- 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:
- 8-HVSSOP
LM2832YMY/NOPB FAQ
1.How can I place an order for LM2832YMY/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2832YMY/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 LM2832YMY/NOPB reliable?
The price and inventory of LM2832YMY/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2832YMY/NOPB is usually 5 days.
3.What payment methods are accepted for LM2832YMY/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2832YMY/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2832YMY/NOPB?
LM2832YMY/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2832YMY/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 LM2832YMY/NOPB?
For technical support, including LM2832YMY/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2832YMY/NOPB requirements.
6.How does Aetrix verify that LM2832YMY/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2832YMY/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 LM2832YMY/NOPB meets industry standards.
7.What is the process for return or replacement of LM2832YMY/NOPB?
All LM2832YMY/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2832YMY/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 LM2832YMY/NOPB part is unused and in its original packaging.
Return procedure for LM2832YMY/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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