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Texas Instruments LM2832XMY
- Part No.:
- LM2832XMY
- Manufacturer:
- Texas Instruments
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LM2832XMY.pdf
- Description:
- IC REG BUCK ADJ 2A 8HVSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,747
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Product details
Overview
LM2832XMY from Texas Instruments is a monolithic, high-frequency PWM step-down DC-DC regulator in an 8-pin eMSOP-PowerPAD package, delivering up to 2.0A output current with 0.6V internal reference and 1.6MHz fixed switching frequency. It integrates a 150mΩ PMOS switch and supports input voltages from 3.0V to 5.5V, targeting compact local power conversion in USB-powered devices and set-top boxes.
For engineers reviewing the LM2832XMY datasheet, LM2832XMY pinout, LM2832XMY application, or LM2832XMY equivalent, key selection criteria include verified 1.6MHz operation, thermal shutdown at 165°C, 30nA shutdown current, ±2% feedback voltage accuracy, and compatibility with ceramic output capacitors for low-ripple, high-transient-response designs.
Technical Context
The LM2832XMY employs current-mode PWM control with internal compensation, enabling stable regulation across wide load and input ranges without external loop components. Its 1.6MHz oscillator supports ultra-small inductors (e.g., 1.0–2.2µH) and ceramic capacitors while maintaining fast transient response.
It features cycle-by-cycle current limiting (typ. 3.25A), internal soft-start (~600µs ramp), overvoltage protection (15% above VREF), and undervoltage lockout with 430mV hysteresis (2.73V turn-on, 2.3V turn-off). The 0.6V feedback reference enables precise output setting via external resistor divider.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 1.6 MHz - enables use of sub-2.2 µH inductors and 22 µF ceramic output capacitors, minimizing PCB area. |
| Output Current | 2.0 A - continuous regulated load capability with internal 150 mΩ PMOS switch and thermal shutdown at 165°C. |
| Feedback Voltage | 0.600 V ±2% - sets output voltage via external resistor divider; supports 0.6V–4.5V range with high accuracy. |
| Input Voltage Range | 3.0 V to 5.5 V - compatible with single-cell Li-ion, USB 5V, and 3.3V/5V rail systems. |
| Quiescent Current | 2.8–4.5 mA (switching), 30 nA (shutdown) - enables ultra-low standby power in battery-backed applications. |
| Thermal Resistance | θJA = 80 °C/W, θJC = 18 °C/W - requires exposed DAP soldered to ground plane for reliable 2A operation at +125°C ambient. |
| Enable Threshold | VEN_TH = 1.8 V - logic-compatible enable with 0.4 V shutdown threshold; prevents false turn-on during brownout. |
Pinout & Package
The LM2832XMY is housed in an 8-pin eMSOP-PowerPAD package with exposed die attach pad (DAP) for enhanced thermal dissipation. DAP must be soldered to system ground but cannot serve as primary GND connection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIND | Power Input Supply | Main input voltage rail (3.0–5.5V); connects to input capacitor and shares node with VINA. |
| VINA | Control Circuitry Supply | Bias supply for internal circuitry; must be tied directly to VIND on PCB for stable operation. |
| GND (Pins 3, 5, 7) | Signal & Power Ground | Common return for feedback network, SW node path, and internal circuits; bottom resistor of FB divider must be placed adjacent to Pin 3. |
| EN | Enable Control Input | Active-high logic input; floating or >VINA+0.3V causes undefined behavior; 30nA shutdown current enables battery longevity. |
| FB | Feedback Input | High-impedance (≤100 nA bias) node sensing output voltage via resistor divider; trace must be short and noise-shielded. |
| SW | Switch Node Output | Drives external inductor and catch diode; swings from ~VIN to −0.4V (Schottky VF); high dv/dt node requiring tight layout. |
| DAP | Die Attach Pad | Thermal interface only; must be soldered to large copper pour connected to GND for θJC = 18 °C/W performance. |
Key Features
| Feature | Design Value |
|---|---|
| Current-mode PWM control | Enables stable regulation with minimal external components; eliminates need for external compensation network. |
| Internal soft-start (600 µs) | Controls output voltage ramp rate to limit inrush current into bulk capacitance and downstream loads. |
| Overvoltage protection (OVP) | Shuts down SW when FB exceeds 1.15×VREF (≈0.69V), protecting downstream 3.3V logic from overvoltage faults. |
| Pulse-by-pulse current limit | Clamps peak switch current at ≥2.4A (min) to prevent damage during overload or short-circuit conditions. |
| Thermal shutdown with hysteresis | Disables switching at 165°C junction temperature; resumes operation only after cooling to ~150°C, preventing thermal cycling. |
Applications
| USB-Powered Devices | Set-Top Boxes |
|---|---|
Use Scenario: Powering FPGA I/O banks and USB PHY from 5V bus in portable media adapters. IC Role / Device Role / Timing Role: Primary 3.3V step-down regulator supplying 2.0A with fast load transient response to handle burst data transfers. Use Value: 1.6MHz operation allows 1.5µH inductor and 22µF X7R ceramic output capacitor, reducing solution size by >40% vs. 500kHz alternatives. | Use Scenario: Local core voltage generation for MPEG decoder SoC in consumer STB with strict EMI limits. IC Role / Device Role / Timing Role: High-efficiency buck converter delivering regulated 1.8V/1.2V rails with <10mV load regulation error. Use Value: Internal 0.6V reference and ±2% accuracy enable precise output setting without trimming; 93% peak efficiency reduces thermal load on enclosed chassis. |
| HDD Core Power | DSL Modems |
Use Scenario: Providing 1.2V core supply to 2.5" HDD controller IC with rapid spin-up current demands. IC Role / Device Role / Timing Role: High-current, thermally robust DC-DC regulator supporting 2A peak loads and surviving repeated thermal cycles. Use Value: eMSOP-PowerPAD package with θJC = 18°C/W and thermal shutdown ensures reliability under sustained 2A load at +85°C ambient. | Use Scenario: Generating 3.3V auxiliary rail from 5V PoE-derived input in space-constrained DSL gateway. IC Role / Device Role / Timing Role: Compact, self-contained buck regulator eliminating need for external MOSFET driver or compensation parts. Use Value: 6-pin WSON and 8-pin eMSOP variants share identical electrical specs; LM2832XMY's PowerPAD enables higher power density than WSON in same footprint. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2832XMM | Same 1.6MHz frequency and 2A rating, but in 6-pin WSON package with smaller footprint (2.0mm × 2.0mm) and higher θJA (90°C/W). | Limited thermal headroom at full 2A load in still air; unsuitable for sealed enclosures above +70°C ambient. | Select LM2832XMM only when board area is critical and thermal derating to 1.5A is acceptable. |
| TPS62231DRVR | 1.6MHz synchronous buck, 2A, 0.6V reference, but uses integrated Schottky-free synchronous rectification and lower IQ (17µA shutdown). | Higher light-load efficiency due to synchronous architecture; lacks OVP and UVLO hysteresis per datasheet. | Choose TPS62231DRVR where >90% efficiency at 10mA load matters more than fault protection robustness. |
Compared with LM2832XMM, the LM2832XMY offers superior thermal performance (θJC = 18°C/W vs. not specified) and higher reliability at full 2A load; versus TPS62231DRVR, it provides stronger protection features (OVP, UVLO hysteresis, thermal shutdown) at the cost of slightly lower light-load efficiency.
Availability
LM2832XMY is available at Aetrix Electronics and suitable for USB-powered devices, set-top boxes, HDD core power, and DSL modems requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for LM2832XMY 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 delivers compact, high-frequency step-down regulators optimized for space-constrained, thermally demanding applications such as portable electronics and broadband infrastructure equipment.
FAQ
What is the exact switching frequency of the LM2832XMY?
The LM2832XMY has a fixed internal switching frequency of 1.6 MHz, confirmed in the Electrical Characteristics table (FSW = 1.2–1.95 MHz, typ. 1.6 MHz) and Typical Performance Characteristics (Figure 10). This frequency is factory-trimmed and does not require external timing components.
Does the LM2832XMY support adjustable output voltage?
Yes, the LM2832XMY supports adjustable output voltage from 0.6V to 4.5V using an external resistor divider connected to the FB pin. With its 0.600V ±2% internal reference, output voltage is calculated as VOUT = 0.6V × (1 + R1/R2), where R2 connects FB to GND.
What is the maximum continuous output current for the LM2832XMY?
The LM2832XMY delivers up to 2.0A continuous output current under recommended thermal conditions: eMSOP-PowerPAD package with DAP soldered to ≥4 thermal vias connected to inner ground plane, ambient ≤+125°C, and proper PCB copper area.
How does the LM2832XMY handle overvoltage conditions?
The LM2832XMY includes dedicated overvoltage protection (OVP) that disables the internal PMOS switch when the FB pin voltage exceeds 15% above the 0.6V reference (i.e., >0.69V), allowing the output to decay safely. This protects downstream 3.3V logic from fault-induced overvoltage.
Is the LM2832XMY pin-compatible with other LM2832 variants like LM2832Y or LM2832Z?
No - LM2832XMY (1.6MHz, eMSOP-8) is not pin-compatible with LM2832Y (0.55MHz) or LM2832Z (3.0MHz), as all share identical pinouts and package footprints but differ only in factory-set oscillator frequency. Frequency variant selection is purely electrical; no PCB change is needed when swapping within the same package type.
LM2832XMY 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:
- 1.6MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-HVSSOP
LM2832XMY FAQ
1.How can I place an order for LM2832XMY through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2832XMY 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 LM2832XMY reliable?
The price and inventory of LM2832XMY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2832XMY is usually 5 days.
3.What payment methods are accepted for LM2832XMY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2832XMY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2832XMY?
LM2832XMY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2832XMY 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 LM2832XMY?
For technical support, including LM2832XMY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2832XMY requirements.
6.How does Aetrix verify that LM2832XMY is sourced from the original manufacturer or authorized distributors?
All LM2832XMY 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 LM2832XMY meets industry standards.
7.What is the process for return or replacement of LM2832XMY?
All LM2832XMY units undergo pre-shipment inspection (PSI). If there is an issue with LM2832XMY, 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 LM2832XMY part is unused and in its original packaging.
Return procedure for LM2832XMY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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