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Texas Instruments LM2832YMY
- Part No.:
- LM2832YMY
- Manufacturer:
- Texas Instruments
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LM2832YMY.pdf
- Description:
- IC REG BUCK ADJ 2A 8HVSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,364
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Product details
Overview
LM2832YMY 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 ramp-up. It serves as a compact, high-efficiency local power supply in USB-powered devices and set-top boxes.
For engineers reviewing the LM2832YMY datasheet, LM2832YMY pinout, LM2832YMY application, or LM2832YMY equivalent, key selection considerations include its 550 kHz switching frequency, 3.0V–5.5V input range, 0.6V–4.5V adjustable output, thermal shutdown at 165°C, and enable-controlled ultra-low 30 nA shutdown current.
Technical Context
The LM2832YMY employs current-mode PWM control with internal compensation, enabling stable regulation across wide load and line variations without external loop components. Its 550 kHz fixed-frequency oscillator supports fast transient response and allows use of small ceramic capacitors and low-profile inductors.
It integrates a 150 mΩ PMOS power switch, cycle-by-cycle current limiting (typ. 3.25A), undervoltage lockout (UVLO) with 2.73V turn-on and 430 mV hysteresis, and output overvoltage protection triggered at 15% above VFB. The internal 0.6V reference and FB pin enable precise output voltage setting via external resistor divider.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0V to 5.5V - supports direct operation from USB 5V or single-cell Li-ion with LDO pre-regulation. |
| Output Current | 2.0A continuous - sufficient for powering core logic, FPGAs, or SoCs in space-constrained applications. |
| Switching Frequency | 0.55 MHz - enables use of ≤2.2 µH inductors and 22 µF ceramic output capacitors, minimizing PCB footprint. |
| Feedback Reference | 0.600 V ±2% - sets output voltage accuracy; enables 3.3V output with R1/R2 = 4.5kΩ/10kΩ divider. |
| Quiescent Current | 2.8–4.5 mA (switching), 30 nA (shutdown) - ensures minimal standby power loss in battery-backed systems. |
| Thermal Shutdown | 165°C activation - protects against sustained overload or poor heatsinking; auto-recovery at ~150°C. |
| Enable Threshold | 1.8 V (min), 0.4 V (max shutdown) - compatible with standard GPIOs and supports clean power sequencing. |
Pinout & Package
The LM2832YMY is housed in an 8-pin eMSOP-PowerPAD package with exposed thermal pad (DAP) that must be soldered to system ground for effective heat dissipation. Package dimensions: 3.0 mm × 3.0 mm × 0.8 mm, 0.65 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIND | Power input supply | Main power rail connection; accepts 3.0–5.5V; requires local 22 µF input capacitor. |
| VINA | Control circuitry supply | Bias supply for internal logic; must be tied directly to VIND on PCB to ensure stable reference operation. |
| EN | Enable control input | Active-high logic input; floating or >VINA+0.3V causes undefined behavior; 30 nA shutdown current when pulled low. |
| GND (Pins 3, 5, 7) | Signal & power ground | Primary return path; feedback resistor bottom end must connect here to minimize noise coupling. |
| FB | Feedback sensing node | High-impedance input (100 nA bias); connects to resistor divider midpoint to regulate output voltage. |
| SW | Switch node output | Drives external inductor and Schottky catch diode; experiences full VIN-to-ground swing during switching. |
| 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 and prevent output overshoot during startup. |
| Current-mode PWM control | Enables inherent cycle-by-cycle current limiting and stable operation without external compensation components. |
| Output overvoltage protection | Shuts down SW when FB exceeds 15% above 0.6V reference, preventing damage to downstream 3.3V logic. |
| Thermal shutdown with hysteresis | Halts switching at 165°C junction temperature and resumes only after cooling to ~150°C, avoiding thermal oscillation. |
| Ultra-low shutdown current | 30 nA enables multi-year battery life in always-on IoT sensors powered by coin cells or energy harvesters. |
Applications
| USB Powered Devices | Set-Top Boxes |
|---|---|
Use Scenario: Powering HDMI controller, USB PHY, and microcontroller from a 5V USB port in portable media adapters. IC Role / Device Role / Timing Role: Primary 3.3V buck regulator supplying core logic rails with tight voltage tolerance and fast load transient response. Use Value: Eliminates need for external current-sense resistors or compensation networks, reducing BOM count by ≥3 components vs. controller-based solutions. | Use Scenario: Generating 3.3V for demodulator ICs and front-panel microcontrollers in consumer STB designs. IC Role / Device Role / Timing Role: Local point-of-load converter replacing discrete MOSFET + controller solutions in cost-sensitive CE applications. Use Value: Achieves 88% efficiency at 1.75A/3.3V (VIN=5V), reducing thermal load on densely packed STB PCBs without heatsinks. |
| Local 5V to Vcore Converters | Core Power in HDDs |
Use Scenario: Providing regulated 3.3V to FPGA configuration memory and I/O banks in embedded industrial controllers. IC Role / Device Role / Timing Role: High-density step-down regulator with integrated switch, placed adjacent to load to minimize IR drop and noise coupling. Use Value: 0.55 MHz switching enables <10 mm² total solution size including inductor and capacitors - critical for fanless edge compute modules. | Use Scenario: Supplying 3.3V to HDD servo controllers and interface logic where space and EMI are tightly constrained. IC Role / Device Role / Timing Role: Compact, low-noise DC-DC stage meeting CISPR-22 Class B conducted emissions limits without added shielding. Use Value: Internal soft-start and current-mode control suppress startup surge and maintain regulation during rapid spindle motor current transients. |
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 | 1.6 MHz switching frequency, higher DMAX (94%), lower minimum duty cycle (5%) - optimized for lower output voltages and smaller inductors. | Better suited for 1.2V/1.8V core rails; less optimal for 3.3V outputs due to reduced duty cycle headroom at 5V input. | Select LM2832XMY only when targeting sub-2V outputs or requiring smallest possible magnetics; LM2832YMY remains preferred for 3.3V/5V conversion. |
| TPS62231DRVR | 3 MHz fixed frequency, 2A rating, 2.05V–6.5V input, 0.6V reference, but uses external compensation and lacks integrated OVP/thermal shutdown. | Requires additional components for stability and protection; higher design complexity but offers tighter output voltage accuracy (±1%). | Choose TPS62231DRVR only if ±1% output tolerance is mandatory and board area allows extra passives; LM2832YMY provides faster time-to-market with full protection integration. |
Compared with LM2832XMY and TPS62231DRVR, the LM2832YMY delivers optimal balance of simplicity (no external compensation), robustness (integrated OVP, UVLO, thermal shutdown), and 3.3V-specific performance - making it the most production-ready choice for USB-powered and consumer electronics applications.
Availability
LM2832YMY is available at Aetrix Electronics and suitable for USB-powered devices, set-top boxes, and local 5V-to-3.3V point-of-load converters requiring stable component supply, long-term lifecycle support, and consistent parametric performance across manufacturing lots.
Supply support for LM2832YMY 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 automotive-grade reliability.
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 efficiency, and ease of layout.
FAQ
What is the recommended input capacitor for LM2832YMY?
The LM2832YMY datasheet specifies a 22 µF multilayer ceramic capacitor (MLCC) with X7R or X5R dielectric as the recommended input capacitor. It must have low ESL and be rated for ≥6.3V. Placement must be adjacent to VIND and GND pins, with short, wide traces to minimize impedance and prevent input voltage droop during switching transitions. The LM2832YMY's 550 kHz frequency makes leaded capacitors unsuitable due to excessive ESL.
Can LM2832YMY be used to generate 3.3V from a 5V input?
Yes, the LM2832YMY is explicitly validated for 3.3V output at 2.0A from a 5V input, as shown in the Typical Application Circuit and Figure 5 (η vs Load). With VFB = 0.600 V, a resistor divider of R1 = 4.5 kΩ and R2 = 10 kΩ sets VO = 3.3V. Efficiency reaches 88% under these conditions, and thermal performance remains within specification when the DAP is properly soldered to a GND plane.
Does LM2832YMY require external compensation components?
No, the LM2832YMY uses internally compensated current-mode control architecture. No external compensation network (e.g., type-II or type-III compensator) is required. This simplifies design, reduces component count, and eliminates tuning effort - a key differentiator versus controller-based buck ICs. Stability is ensured across the full 3.0V–5.5V input and 0.6V–4.5V output ranges.
What is the function of the DAP pin on LM2832YMY?
On the LM2832YMY, the DAP (Die Attach Pad) is a thermally conductive exposed pad on the underside of the 8-pin eMSOP-PowerPAD package. It must be soldered to a solid GND plane using ≥4 thermal vias to achieve the specified θJA = 80°C/W. It serves exclusively for heat dissipation and cannot be used as a functional ground connection - all signal and power returns must use dedicated GND pins (3, 5, 7).
How does LM2832YMY handle overcurrent conditions?
The LM2832YMY implements cycle-by-cycle current limiting that triggers when switch current exceeds 2.4A (min) - typically 3.25A. During overload, the internal PMOS switch turns off each cycle once the current sense threshold is reached, maintaining constant peak current while reducing duty cycle. This prevents thermal runaway and allows safe operation into short-circuit conditions until thermal shutdown activates at 165°C junction temperature.
LM2832YMY 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
LM2832YMY FAQ
1.How can I place an order for LM2832YMY through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2832YMY 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 reliable?
The price and inventory of LM2832YMY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2832YMY is usually 5 days.
3.What payment methods are accepted for LM2832YMY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2832YMY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2832YMY?
LM2832YMY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2832YMY 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?
For technical support, including LM2832YMY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2832YMY requirements.
6.How does Aetrix verify that LM2832YMY is sourced from the original manufacturer or authorized distributors?
All LM2832YMY 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 meets industry standards.
7.What is the process for return or replacement of LM2832YMY?
All LM2832YMY units undergo pre-shipment inspection (PSI). If there is an issue with LM2832YMY, 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 part is unused and in its original packaging.
Return procedure for LM2832YMY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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