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Texas Instruments LM2832ZSDX
- Part No.:
- LM2832ZSDX
- Manufacturer:
- Texas Instruments
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
LM2832ZSDX.pdf
- Description:
- IC REG BUCK ADJ 2A 6WSON
- Quantity:
- Payment:
- Shipping:
Inventory:4,240
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Product details
Overview
LM2832ZSDX from Texas Instruments is a monolithic, high-frequency PWM step-down DC-DC regulator in a 6-pin WSON package with exposed thermal pad. It delivers up to 2.0A output current at 3.3V from a 5V input, features a 3.0MHz switching frequency, 150mΩ internal PMOS switch, and 0.6V ±2% feedback reference-designed for compact, high-efficiency local power conversion in space-constrained USB-powered devices.
For engineers reviewing the LM2832ZSDX datasheet, LM2832ZSDX pinout, LM2832ZSDX application, or LM2832ZSDX equivalent, key selection criteria include its fixed 3.0MHz operation, thermal shutdown (165°C), ultra-low 30nA shutdown current, current-mode control architecture, and compatibility with ceramic output capacitors for fast transient response in embedded point-of-load designs.
Technical Context
The LM2832ZSDX employs current-mode PWM control with internal compensation, enabling stable regulation across 3.0V–5.5V input and 0.6V–4.5V output ranges without external loop components. Its 3.0MHz switching frequency supports sub-1µH inductors and low-ESR ceramic capacitors, minimizing PCB footprint while maintaining >90% efficiency at 2A/3.3V output.
It integrates critical protection functions: cycle-by-cycle current limiting (typ. 3.25A), overvoltage protection (15% above VFB), undervoltage lockout (2.73V rising, 2.3V falling), and thermal shutdown with 15°C hysteresis. The 30ns minimum on-time enables high duty-cycle operation down to 0.6V output even at 5.5V input.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 3.0 MHz - Enables use of ≤1.0 µH inductors and small ceramic capacitors, reducing solution size by >40% vs. 550 kHz alternatives. |
| Output Current | 2.0 A - Sustained continuous load capability with internal 150 mΩ PMOS switch; peak current limit typ. 3.25 A. |
| Feedback Voltage | 0.600 V ±2% - Precision reference enabling accurate output voltage setting (e.g., 3.3V via R1/R2 divider) across -40°C to +125°C. |
| Input Voltage Range | 3.0 V to 5.5 V - Matches standard USB 5V and Li-ion battery rails; includes UVLO with 430 mV hysteresis for clean startup. |
| Quiescent Current | 4.3–6.5 mA (active), 30 nA (shutdown) - Minimizes standby power loss in always-on systems; enables <1 µW system sleep modes. |
| Thermal Shutdown | 165°C activation, ~150°C recovery - Protects against sustained overload or poor heatsinking; DAP pad provides 18°C/W junction-to-case path. |
| Package | 6-pin WSON (2.0 mm × 2.0 mm, 0.5 mm pitch) with exposed thermal pad - Optimized for high-power density; requires soldered DAP to PCB ground for thermal performance. |
Pinout & Package
LM2832ZSDX uses a 6-pin WSON (2.0 mm × 2.0 mm) package with an exposed die attach pad (DAP) that must be soldered to PCB ground for thermal management. The DAP is not a functional signal pin but provides critical thermal conduction (θJC = 18°C/W).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | FB | High-impedance feedback node; connects to resistor divider to set output voltage; trace must be short and noise-shielded. |
| 2 | GND | Signal and power ground; primary return for FB divider bottom resistor; must tie closely to DAP and input/output capacitor grounds. |
| 3 | SW | Switch node output; connects to inductor and catch diode anode; high dv/dt node requiring minimized trace area and length. |
| 4 | VIND | Main power input (3.0–5.5V); supplies internal PMOS switch; requires local 22 µF ceramic input capacitor with low ESL. |
| 5 | VINA | Control circuitry supply; must be connected directly to VIND on PCB; powers error amplifier, oscillator, and logic. |
| 6 | EN | Enable input; logic-high (>1.8V) enables regulation; floating or >VINA+0.3V causes undefined behavior; supports 30 nA shutdown. |
Key Features
| Feature | Design Value |
|---|---|
| 3.0 MHz fixed-frequency PWM | Enables <1.0 µH inductors and 22 µF ceramic output capacitors-reducing total BOM count and PCB area by >35% vs. lower-frequency regulators. |
| Current-mode control with internal compensation | Eliminates need for external compensation network; provides robust stability across full load and input range with minimal design iteration. |
| Internal soft-start (600 µs ramp) | Controls output voltage rise time to limit inrush current into downstream capacitance-prevents input rail droop and system brownouts. |
| Integrated 150 mΩ PMOS switch | Delivers 2.0A continuous output without external MOSFETs; reduces component count, layout complexity, and conduction losses at high load. |
| Output overvoltage protection (OVP) | Shuts off SW when FB exceeds 15% above 0.6V reference-protects downstream ICs from catastrophic failure during feedback divider fault. |
Applications
| USB-Powered Portable Devices | Set-Top Box Core Rails |
|---|---|
|
Use Scenario: Powering FPGA I/O banks or microcontroller peripherals from a single USB 5V port in handheld test equipment. IC Role / Device Role / Timing Role: Primary step-down regulator converting 5V USB input to stable 3.3V at up to 2.0A, with fast load transient response to handle bursty digital logic currents. Use Value: 3.0MHz operation minimizes inductor size (<1.0 mm height), enabling ultra-thin device profiles; 30nA shutdown extends battery life in sleep mode. |
Use Scenario: Generating 1.8V core voltage for SoC in consumer set-top boxes powered from 5V standby rail. IC Role / Device Role / Timing Role: High-efficiency point-of-load converter delivering regulated 1.8V at 1.5A with tight line/load regulation (<±1.5%) across temperature. Use Value: Internal 0.6V reference and current-mode control maintain ±2% output accuracy over -40°C to +125°C ambient-ensuring SoC reliability without external monitoring. |
| HDD Preamp & Servo Drivers | DSL Modem Line Cards |
|
Use Scenario: Supplying analog preamplifier and servo motor driver circuits in 2.5-inch HDDs where board space and thermal headroom are severely constrained. IC Role / Device Role / Timing Role: Local 5V-to-3.3V regulator with integrated thermal shutdown and OVP-protecting sensitive analog front-end from overtemperature or feedback faults. Use Value: 6-pin WSON package with DAP achieves θJA = 80°C/W on 2-layer boards, allowing 2.0A operation without heatsinks in sealed enclosures. |
Use Scenario: Providing isolated 3.3V bias for DSL line drivers and PHY interfaces in multi-port residential gateways. IC Role / Device Role / Timing Role: Compact, high-SMR (switching frequency margin) regulator supporting rapid load transients from ADSL2+ line bursts. Use Value: 30ns minimum on-time and 3.0MHz frequency ensure stable regulation even during deep dropout (e.g., VIN = 3.3V → VOUT = 3.3V), preventing data corruption. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2832YSDX | 0.55 MHz switching frequency; higher max duty cycle (96%); lower quiescent current (2.8–4.5 mA active) | Better light-load efficiency; requires larger inductor (≥2.2 µH) and capacitor; less suitable for ultra-compact layouts | Select when optimizing for standby power over size-e.g., battery-backed IoT gateways needing <5 µA system sleep current. |
| TPS62231DRVR | 3.0 MHz, 2A, 0.6V ref, but uses synchronous rectification (no external diode); 1.2 µH typical inductor; 2.9V–6.0V input | Higher efficiency at mid-to-heavy loads (>500 mA); eliminates Schottky diode BOM cost and thermal stress | Choose for new designs prioritizing >92% full-load efficiency and simplified bill-of-materials-especially where thermal derating is critical. |
Compared with LM2832YSDX, the LM2832ZSDX trades slightly higher active quiescent current for 3× faster switching, enabling 60% smaller magnetics; versus TPS62231DRVR, it retains asynchronous operation for lower cost and simpler layout, albeit with ~2% lower peak efficiency due to diode conduction loss.
Availability
LM2832ZSDX is available at Aetrix Electronics and suitable for USB-powered portable devices, set-top box core rails, HDD preamp circuits, and DSL modem line cards requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for LM2832ZSDX 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-reliability DC-DC conversion solutions.
The LM2832 product line was engineered for space-constrained, high-efficiency point-of-load applications in consumer and computing electronics-delivering 2A output in sub-4mm² packages with industry-leading thermal performance and integrated protection.
FAQ
What is the maximum supported output voltage for the LM2832ZSDX?
The LM2832ZSDX supports output voltages from 0.6V to 4.5V, set externally via a resistor divider connected to the FB pin. The 0.6V internal reference allows precise configuration-for example, a 3.3V output requires R1 = 45.3kΩ and R2 = 10.0kΩ. Output voltage accuracy is maintained within ±2% over temperature and line/load conditions per the datasheet's electrical characteristics table.
Does the LM2832ZSDX require an external catch diode?
Yes, the LM2832ZSDX requires an external Schottky catch diode (e.g., RB055LAM-40) connected between the SW pin and GND. This diode conducts during the PMOS switch off-time to sustain inductor current. A low-forward-voltage (≤0.45V), fast-recovery Schottky diode rated for ≥2.0A average current is mandatory to achieve >90% efficiency and prevent thermal overstress under full load.
Can the LM2832ZSDX operate with a 3.3V input to generate 3.3V output?
No-the LM2832ZSDX is a buck (step-down) 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 ~2.7V max. For 3.3V-in/3.3V-out applications, a low-dropout linear regulator (LDO) or buck-boost topology is required instead.
What is the recommended PCB layout practice for the LM2832ZSDX thermal pad?
The exposed DAP on the LM2832ZSDX must be soldered to a solid copper ground plane using ≥4 thermal vias (0.3mm diameter) placed directly beneath the pad. These vias should connect to inner-layer ground planes to achieve θJA ≤ 80°C/W. Avoid routing signals under the DAP or splitting the ground plane-this ensures reliable 2.0A operation without thermal shutdown at +85°C ambient.
How does the LM2832ZSDX handle overcurrent conditions?
The LM2832ZSDX implements cycle-by-cycle current limiting: each switching cycle monitors switch current via internal sensing, and disables the PMOS if current exceeds 2.4A (min) or 3.25A (typ). This protects against short-circuit or overload events without latching-operation resumes normally after the fault clears. Combined with thermal shutdown (165°C), this provides dual-layer fault protection for robust field operation.
LM2832ZSDX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 6-WDFN 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:
- 3MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-WSON (3x3)
LM2832ZSDX FAQ
1.How can I place an order for LM2832ZSDX through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2832ZSDX 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 LM2832ZSDX reliable?
The price and inventory of LM2832ZSDX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2832ZSDX is usually 5 days.
3.What payment methods are accepted for LM2832ZSDX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2832ZSDX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2832ZSDX?
LM2832ZSDX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2832ZSDX 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 LM2832ZSDX?
For technical support, including LM2832ZSDX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2832ZSDX requirements.
6.How does Aetrix verify that LM2832ZSDX is sourced from the original manufacturer or authorized distributors?
All LM2832ZSDX 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 LM2832ZSDX meets industry standards.
7.What is the process for return or replacement of LM2832ZSDX?
All LM2832ZSDX units undergo pre-shipment inspection (PSI). If there is an issue with LM2832ZSDX, 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 LM2832ZSDX part is unused and in its original packaging.
Return procedure for LM2832ZSDX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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