Texas Instruments LM2832ZSD

Overview

LM2832ZSD from Texas Instruments is a monolithic, high-frequency PWM step-down DC-DC regulator delivering 2.0A output current with fixed 3.0MHz switching frequency, 0.6V internal reference (±2%), and 150mΩ PMOS switch in a thermally enhanced 6-pin WSON package. It regulates 3.3V output from 5V input in compact USB-powered devices and set-top boxes.

For engineers reviewing the LM2832ZSD datasheet, LM2832ZSD pinout, LM2832ZSD application, or LM2832ZSD equivalent, key selection criteria include its 3.0MHz fixed-frequency operation enabling ultra-small external inductors, thermal shutdown at 165°C, 30nA shutdown current, current-mode control for fast transient response, and support for ceramic output capacitors without compromising stability.

Technical Context

The LM2832ZSD employs current-mode PWM control with internal compensation and a 0.6V precision feedback reference to maintain tight regulation across load and line variations. Its 3.0MHz oscillator enables sub-1µH inductor use and supports <600µs soft-start to limit inrush current.

It integrates cycle-by-cycle current limiting (typ. 3.25A), overvoltage protection (15% above VREF), undervoltage lockout (2.73V rising threshold with 430mV hysteresis), and thermal shutdown-ensuring robust operation in space-constrained embedded power rails.

Key Specifications

Pinout & Package

The LM2832ZSD is housed in a 2mm × 2mm, 6-pin WSON package with exposed thermal pad (DAP) requiring solder connection to PCB ground plane for optimal thermal performance (θ_JA = 80°C/W with 4–6 thermal vias).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS62231DRYR and MP2104DQ-LF-Z, the LM2832ZSD offers the highest switching frequency (3.0MHz) in the smallest WSON-6 package, delivering superior power density and transient response-but requires tighter layout attention on SW node routing and thermal via placement.

Availability

LM2832ZSD is available at Aetrix Electronics and suitable for USB-powered devices, set-top boxes, HDD core power, and DSL modems requiring stable component supply with guaranteed long-term manufacturability.

Supply support for LM2832ZSD 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.

The LM2832 product line delivers monolithic, high-frequency step-down regulators targeting space-constrained applications where small inductors, ceramic capacitors, and minimal external components are mandatory.

FAQ

What is the maximum output current supported by the LM2832ZSD?

The LM2832ZSD delivers up to 2.0A continuous output current under typical conditions (VIN = 5V, VOUT = 3.3V, TA = 25°C). Its cycle-by-cycle current limit is specified at 2.4A minimum and 3.25A typical, ensuring safe operation even during transient overloads. Thermal derating applies above 85°C ambient, and PCB thermal design-including at least four thermal vias under the DAP-is critical to sustain full 2A output at elevated temperatures.

Does the LM2832ZSD require external compensation components?

No, the LM2832ZSD uses internally compensated current-mode control and requires no external compensation components. This simplifies design and reduces BOM count-only an input capacitor, output capacitor, inductor, feedback resistor divider, and Schottky catch diode are needed. The internal compensation is optimized for stability with ceramic output capacitors ≥22µF, eliminating the need for tantalum or electrolytic types.

What is the purpose of the VINA pin on the LM2832ZSD?

The VINA pin supplies bias voltage to the LM2832ZSD's internal analog control circuitry, including the error amplifier, oscillator, and soft-start block. It must be connected directly to VIND on the PCB-never left floating or decoupled separately-as mismatched voltages between VINA and VIND can cause regulation instability or startup failure. This dual-supply architecture isolates sensitive analog functions from high-current switching noise on VIND.

Can the LM2832ZSD operate with a 3.3V input to generate a 1.2V output?

Yes, the LM2832ZSD supports input voltages from 3.0V to 5.5V and output voltages from 0.6V to 4.5V. At VIN = 3.3V and VOUT = 1.2V, the duty cycle is ~36%, well within the 7–90% range specified for the LM2832Z variant. Efficiency remains >85% at 1.2V/2A output, and the 3.0MHz switching frequency ensures fast transient response critical for processor core rails.

How does the LM2832ZSD handle thermal overload conditions?

The LM2832ZSD incorporates thermal shutdown that disables the internal PMOS switch when junction temperature exceeds 165°C. Operation resumes only after the die cools to ~150°C, providing 15°C hysteresis to prevent oscillation. To maximize thermal performance, the exposed DAP must be soldered to a solid PCB ground plane with 4–6 thermal vias, achieving θ_JA ≈ 80°C/W. Without proper thermal design, sustained 2A loads may trigger shutdown above 70°C ambient.