Texas Instruments LM2832ZMYX

Overview

LM2832ZMYX from Texas Instruments is a monolithic, high-frequency PWM step-down DC-DC regulator with internal 150 mΩ PMOS switch, delivering up to 2.0A output current at 3.3V from a 5V input. It operates at a fixed 3.0 MHz switching frequency, supports 0.6V–4.5V adjustable output via resistor divider feedback, and integrates soft-start, overvoltage protection, and thermal shutdown. Used in USB-powered devices and set-top boxes for compact, efficient local voltage conversion.

For engineers reviewing the LM2832ZMYX datasheet, LM2832ZMYX pinout, LM2832ZMYX application, or LM2832ZMYX equivalent, key selection criteria include its 3.0 MHz switching frequency enabling ultra-small external inductors and ceramic capacitors, 0.6V ±2% internal reference for precise regulation, and WSON-6 package with exposed thermal pad for high-power-density designs.

Technical Context

The LM2832ZMYX employs current-mode PWM control with internal compensation, enabling stable regulation across 3.0V–5.5V input and −40°C to +125°C junction temperature. Its 30 ns minimum on-time supports low-duty-cycle operation down to 0.6V output while maintaining 3.0 MHz switching.

It integrates undervoltage lockout (UVLO) with 2.73V turn-on and 430 mV hysteresis, cycle-by-cycle current limiting at 3.25A (typ), and thermal shutdown at 165°C with 15°C hysteresis-ensuring robust protection without external circuitry.

Key Specifications

Pinout & Package

The LM2832ZMYX is housed in a 6-pin WSON package (2.0 mm × 2.0 mm, 0.5 mm pitch) with an exposed die attach pad (DAP) for thermal dissipation. The DAP must be soldered to a PCB ground plane using ≥4 thermal vias for effective junction-to-ambient heat transfer (θ_JA = 80°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar step-down regulator applications.

Compared with LM2832XMYX, the LM2832ZMYX trades slightly higher quiescent current for 3.0 MHz operation-reducing passive component size by >50%. Against TPS62231DRVR, it delivers triple the output current and integrated soft-start, making it the sole viable option for 2.0A USB- or STB-derived 3.3V rails.

Availability

LM2832ZMYX is available at Aetrix Electronics and suitable for USB-powered devices, set-top boxes, DSL modems, and HDD core power applications requiring stable component supply, long-term manufacturability, and consistent parametric performance across production lots.

Supply support for LM2832ZMYX 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 was designed specifically for space-constrained, high-frequency point-of-load applications-emphasizing minimal external components, thermal efficiency, and robust protection in consumer and computing power supplies.

FAQ

What is the maximum output current supported by the LM2832ZMYX?

The LM2832ZMYX supports up to 2.0A continuous output current under specified thermal conditions (T_J ≤ 125°C, proper PCB layout with thermal vias). Its cycle-by-cycle current limit is guaranteed at 2.4A minimum, with a typical trip point of 3.25A-providing margin for transient peaks without derating the 2.0A nominal rating.

Does the LM2832ZMYX require external compensation components?

No, the LM2832ZMYX uses internally compensated current-mode control architecture. This eliminates the need for external compensation networks (e.g., Type II/III compensators), simplifying design and reducing BOM count. Stability is ensured across the full 0.6V–4.5V output range with standard ceramic output capacitors (≥22 µF, X7R/X5R).

What package type is used for the LM2832ZMYX, and how should the exposed pad be handled?

The LM2832ZMYX uses a 6-pin WSON package (2.0 mm × 2.0 mm) with an exposed die attach pad (DAP). The DAP must be soldered to a solid PCB ground plane using at least four 0.3-mm-diameter thermal vias to achieve the specified θ_JA = 80°C/W. It serves as the primary thermal path-not a functional ground connection-and must not be left floating or unconnected.

Can the LM2832ZMYX operate with a 3.3V input to generate 3.3V output?

No-the LM2832ZMYX is a buck (step-down) regulator and cannot sustain regulation at unity or boost ratios. With a 3.3V input, the minimum achievable output is limited by dropout: V_OUT ≤ V_IN − I_OUT × R_DS(ON) ≈ 3.3V − 2.0A × 0.15Ω = 3.0V. For 3.3V output, minimum input is 3.6V; the device is specified for 3.0V–5.5V input, but practical 3.3V-out operation requires ≥3.6V input.

How does the LM2832ZMYX handle overvoltage events on the output?

The LM2832ZMYX includes dedicated output overvoltage protection (OVP) that monitors the FB pin. If the FB voltage exceeds 15% above the 0.6V internal reference (i.e., >0.69V), the internal PMOS switch is immediately disabled, allowing the output to discharge through the catch diode and load. Recovery occurs automatically once FB falls below threshold-no latch or manual reset is required.