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Texas Instruments LM2832ZMY/NOPB
- Part No.:
- LM2832ZMY/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LM2832ZMY/NOPB.pdf
- Description:
- IC REG BUCK ADJ 2A 8HVSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,945
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Product details
Overview
LM2832ZMY/NOPB from Texas Instruments is a monolithic, high-frequency PWM step-down DC-DC regulator in an 8-pin eMSOP-PowerPAD package, delivering 2.0A output current at 3.3V from a 5V input. It integrates a 150 mΩ PMOS switch, features 3.0 MHz fixed switching frequency, 0.6V ±2% internal reference, and current-mode control for fast transient response in space-constrained power rails.
For engineers reviewing the LM2832ZMY/NOPB datasheet, LM2832ZMY/NOPB pinout, LM2832ZMY/NOPB application, or LM2832ZMY/NOPB equivalent, key selection criteria include its 3.0 MHz operation enabling ultra-small external inductors/capacitors, thermal shutdown at 165°C, and enable-controlled ultra-low 30 nA shutdown current - critical for USB-powered devices and set-top box core supplies.
Technical Context
The LM2832ZMY/NOPB implements constant-frequency current-mode PWM control with internal compensation, supporting duty cycles from 7% to 90% across its 3.0–5.5V input range. Its 30 ns minimum on-time enables stable 0.6V–4.5V output regulation down to low VIN, while cycle-by-cycle current limiting (typ. 3.25A) and overvoltage protection (15% above VREF) ensure robust load handling.
Thermal management relies on the exposed DAP connected to system ground, achieving θJC = 18°C/W and θJA = 80°C/W (4-layer board). The device uses BiCMOS process technology to integrate the 150 mΩ PMOS switch and control logic, eliminating external gate drivers and reducing BOM count in compact 5V-to-3.3V point-of-load converters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 3.0 MHz - enables use of ≤1.0 µH inductors and 22 µF ceramic capacitors, minimizing PCB area. |
| Output Current | 2.0 A continuous - supports high-current digital loads like HDD cores and USB peripherals without external pass devices. |
| Input Voltage Range | 3.0 V to 5.5 V - compatible with standard 3.3V/5V rails and battery-backed systems with voltage droop. |
| Feedback Reference | 0.600 V ±2% - sets output via resistor divider; enables precise 3.3V, 2.5V, or 1.8V regulation with <±1% total error. |
| Quiescent Current | 4.3–6.5 mA (active), 30 nA (shutdown) - maintains efficiency at light loads and extends battery life in portable designs. |
| Thermal Shutdown | 165°C activation - protects against sustained overload or poor heatsinking; resumes operation at ~150°C. |
| Enable Threshold | 1.8 V (min), 0.4 V (max shutdown) - supports direct GPIO control from 1.8V/3.3V microcontrollers without level-shifting. |
Pinout & Package
LM2832ZMY/NOPB is housed in an 8-pin eMSOP-PowerPAD package with exposed die attach pad (DAP) for enhanced thermal dissipation. The DAP must be soldered to system ground plane using ≥4 thermal vias to achieve specified θJA = 80°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIND | Power Input Supply | Main input rail connection (3.0–5.5V); carries high peak currents - route with wide, short trace. |
| VINA | Control Circuitry Supply | Bias supply for internal logic; must be tied directly to VIND on PCB to avoid noise coupling. |
| GND (Pins 3,5,7) | Signal & Power Ground | Primary return path for feedback, control, and power loops; place FB divider's bottom resistor adjacent to Pin 3. |
| EN | Enable Control Input | Active-high logic input; float or >VINA+0.3V causes undefined behavior - add pull-down if uncontrolled. |
| FB | Feedback Input | High-impedance node (100 nA bias) monitoring output via resistor divider; keep trace short and away from SW/VIN. |
| SW | Switch Node Output | Drives external inductor and catch diode; experiences 0V to VIN+0.3V swing - minimize loop area to reduce EMI. |
| DAP | Die Attach Pad | Thermal interface only - connect to ground plane but do not use as primary GND return path. |
Key Features
| Feature | Design Value |
|---|---|
| 3.0 MHz Fixed Switching | Enables sub-1 mm³ inductor solutions and eliminates audible noise in consumer audio applications. |
| Internal 150 mΩ PMOS Switch | Eliminates external MOSFET and driver, reducing component count and layout complexity in 2A PoL converters. |
| 0.6V ±2% Internal Reference | Supports accurate output setting from 0.6V to 4.5V with minimal external resistor tolerance impact. |
| Current-Mode PWM Control | Provides inherent cycle-by-cycle current limiting and stable operation across wide input/output ranges without external compensation. |
| Internal Soft-Start (600 µs) | Prevents inrush current during power-up, protecting input capacitors and upstream regulators in multi-rail systems. |
Applications
| Local 5V to Vcore Step-Down Converters | Core Power in HDDs |
|---|---|
Use Scenario: Converting 5V bus to 3.3V/2.5V core voltage for SATA/IDE hard disk drive controllers and motor drivers. IC Role / Device Role / Timing Role: Primary buck regulator supplying regulated Vcore with fast load-step response to handle bursty read/write operations. Use Value: 3.0 MHz switching minimizes inductor size (<1.5 mm height), enabling slim HDD form factors while maintaining >88% efficiency at 2A. | Use Scenario: Providing stable 3.3V power to HDD spindle motor ICs and servo control logic under varying mechanical loads. IC Role / Device Role / Timing Role: High-current, thermally robust DC-DC converter with integrated thermal shutdown to prevent failure during extended spin-up or seek operations. Use Value: 150 mΩ RDS(ON) and DAP thermal path sustain 2A continuous output at 125°C ambient without derating. |
| Set-Top Boxes | USB Powered Devices |
Use Scenario: Generating 3.3V/1.8V rails for SoC, memory, and tuner modules in cable/satellite STBs with tight thermal envelopes. IC Role / Device Role / Timing Role: Compact, high-efficiency point-of-load regulator meeting CE/UL thermal safety requirements in plastic enclosures. Use Value: 30 nA shutdown current enables true "off" mode during standby, complying with Energy Star 7.0 low-power mandates. | Use Scenario: Regulating 5V USB host power to 3.3V for embedded peripherals like webcams, card readers, and Bluetooth adapters. IC Role / Device Role / Timing Role: Input-protected buck converter with UVLO (2.73V) and OVP to survive USB port brownouts and hot-plug transients. Use Value: 0.4V EN threshold allows direct control by USB enumeration signals, enabling automatic power sequencing without extra logic. |
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; lower quiescent current (3.3–5 mA); same 2A rating and package. | Better light-load efficiency; larger inductor required - suited for cost-sensitive, non-audio applications. | Select when EMI filtering is prioritized over size or when 1.6 MHz meets system clock avoidance requirements. |
| TPS62231DRVR | 3.0 MHz, 2A, 2.05V–6.5V input; 0.6V reference; smaller 6-pin WSON package; no separate VINA pin. | Simpler layout (no VINA tie), higher VIN max; lacks UVLO hysteresis and OVP - requires external supervision. | Choose for space-constrained designs where single-supply bias simplifies routing and external fault protection is already present. |
Compared with LM2832XMY/NOPB, the LM2832ZMY/NOPB trades slightly higher active IQ for superior high-frequency performance and smaller magnetics; versus TPS62231DRVR, it offers integrated OVP/UVLO hysteresis and dual-bias inputs at the cost of one additional pin and marginally larger footprint.
Availability
LM2832ZMY/NOPB is available at Aetrix Electronics and suitable for local 5V-to-3.3V step-down converters, HDD core power supplies, and USB-powered peripheral designs requiring stable component supply, consistent parametric performance, and long-term industrial availability.
Supply support for LM2832ZMY/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 technologies, with decades of expertise in high-efficiency DC-DC conversion.
The LM2832 product line delivers monolithic, high-frequency buck regulators optimized for space-constrained, high-current point-of-load applications in consumer, computing, and industrial electronics - emphasizing minimal external components and robust thermal performance.
FAQ
What is the maximum output current capability of the LM2832ZMY/NOPB?
The LM2832ZMY/NOPB delivers up to 2.0 A continuous output current under typical conditions (VIN = 5V, VOUT = 3.3V, TA = 25°C, with proper PCB thermal design). Its cycle-by-cycle current limit is guaranteed at 2.4 A minimum and typically 3.25 A, allowing brief peak loads beyond 2.0 A without shutdown - provided junction temperature remains below 165°C.
Does the LM2832ZMY/NOPB require external compensation components?
No, the LM2832ZMY/NOPB uses internally compensated current-mode control architecture. It operates stably with only five external components: input capacitor, output capacitor, inductor, catch diode, and FB resistor divider. No external compensation network is needed, simplifying design and reducing bill-of-materials cost for 2A buck applications.
What is the purpose of the separate VINA and VIND pins on the LM2832ZMY/NOPB?
VIND supplies power to the internal PMOS switch, while VINA powers the control circuitry (error amplifier, oscillator, logic). They must be connected together on the PCB to ensure consistent biasing. This separation improves noise immunity by isolating sensitive analog circuitry from high-current switching paths - a key advantage over single-supply buck regulators in noisy environments.
Can the LM2832ZMY/NOPB operate with an input voltage below 3.0V?
No - the LM2832ZMY/NOPB has a guaranteed operating input range of 3.0 V to 5.5 V. Its undervoltage lockout (UVLO) activates below 2.3 V (typical turn-off) and re-enables only above 2.73 V (typical turn-on), with 430 mV hysteresis. Operation below 3.0 V is outside specifications and may result in unstable regulation or failure to start.
How does the LM2832ZMY/NOPB protect against overvoltage conditions?
The LM2832ZMY/NOPB includes an internal overvoltage protection (OVP) circuit that monitors the FB pin. When the FB voltage exceeds 15% above the 0.6V internal reference (i.e., >0.69V), the PMOS switch is immediately disabled, allowing the output to discharge through the catch diode and load until regulation is restored - preventing damage to downstream 3.3V logic in fault conditions.
LM2832ZMY/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:
- 3MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-HVSSOP
LM2832ZMY/NOPB FAQ
1.How can I place an order for LM2832ZMY/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2832ZMY/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 LM2832ZMY/NOPB reliable?
The price and inventory of LM2832ZMY/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2832ZMY/NOPB is usually 5 days.
3.What payment methods are accepted for LM2832ZMY/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2832ZMY/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2832ZMY/NOPB?
LM2832ZMY/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2832ZMY/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 LM2832ZMY/NOPB?
For technical support, including LM2832ZMY/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2832ZMY/NOPB requirements.
6.How does Aetrix verify that LM2832ZMY/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2832ZMY/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 LM2832ZMY/NOPB meets industry standards.
7.What is the process for return or replacement of LM2832ZMY/NOPB?
All LM2832ZMY/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2832ZMY/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 LM2832ZMY/NOPB part is unused and in its original packaging.
Return procedure for LM2832ZMY/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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