Texas Instruments LM2830ZSD

Overview

LM2830ZSD from Texas Instruments is a high-frequency, current-mode PWM step-down DC-DC regulator IC in a 5-pin SOT-23 package, delivering up to 1.0 A output current with 3.0 MHz fixed switching frequency, 0.6 V internal reference (±2%), and 130 mΩ PMOS switch. It regulates 3.0–5.5 V input to adjustable 0.6–4.5 V output for compact local power conversion in space-constrained USB-powered devices.

For engineers reviewing the LM2830ZSD datasheet, LM2830ZSD pinout, LM2830ZSD application, or LM2830ZSD equivalent, key selection criteria include its 3.0 MHz operation enabling ultra-small external inductors/capacitors, thermal shutdown at 165°C, 30 nA shutdown current, soft-start timing (~600 µs), and feedback voltage accuracy critical for precision output regulation.

Technical Context

The LM2830ZSD employs constant-frequency current-mode control with internal compensation, using a 0.6 V reference and feedback divider to regulate output voltage. Its 3.0 MHz oscillator supports minimum on-times down to 30 ns, enabling stable operation down to 0.6 V output across the full 3.0–5.5 V input range.

It integrates pulse-by-pulse current limiting (1.2–1.75 A typical), undervoltage lockout (2.73 V rising / 2.3 V falling with 430 mV hysteresis), overvoltage protection (15% above VREF), and thermal shutdown-functions coordinated via monolithic BiCMOS control logic without requiring external compensation components.

Key Specifications

Pinout & Package

LM2830ZSD is housed in a 5-pin SOT-23 package (2.90 mm × 1.60 mm) with exposed pad not electrically connected; thermal path relies on GND pin soldering.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM2830XSD and TPS62231DRVR, the LM2830ZSD offers the highest integration (no external compensation, built-in OVP/UVLO/soft-start) and smallest passive component footprint due to its 3.0 MHz frequency-making it optimal for space-constrained, cost-sensitive USB and consumer electronics designs.

Availability

LM2830ZSD is available at Aetrix Electronics and suitable for USB powered devices, set-top boxes, HDD core power, and automotive infotainment subsystems requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance across production batches.

Supply support for LM2830ZSD 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 company specializing in analog and embedded processing technologies, with leadership in power management ICs for industrial, automotive, and consumer markets.

The LM2830 product line delivers high-frequency, monolithic step-down regulators optimized for compact, low-cost DC-DC conversion in portable and space-constrained electronics where minimal external components and fast transient response are essential.

FAQ

What is the maximum output current capability of the LM2830ZSD?

The LM2830ZSD delivers up to 1.0 A of continuous output current under recommended operating conditions (T_J ≤ 125°C, VIN = 5 V, V_OUT = 3.3 V). Its current limit is specified from 1.2 A (min) to 1.75 A (typ), ensuring robust overload handling. Actual achievable current depends on thermal design, input/output voltage differential, and PCB copper area-derating is required above 85°C ambient.

Does the LM2830ZSD require external compensation components?

No, the LM2830ZSD uses internally compensated current-mode control architecture. It operates stably with only five external components: input capacitor, output capacitor, inductor, catch diode, and feedback resistor divider. No external compensation network (e.g., Type II/III compensator) is needed, simplifying layout and reducing BOM count.

What is the purpose of the EN pin on the LM2830ZSD, and what voltage level enables operation?

EN is an active-high enable pin that controls device startup and shutdown. The LM2830ZSD begins switching when EN voltage exceeds 1.8 V (typical threshold); it enters ultra-low-power shutdown mode (<30 nA) when EN falls below 0.4 V. The pin must never float-TI recommends tying EN to VIN via a 100 kΩ pull-up resistor for default-on operation.

Can the LM2830ZSD be used to generate a 1.2 V output, and how is the feedback network calculated?

Yes, the LM2830ZSD supports 0.6–4.5 V outputs via external resistor divider on the FB pin. For 1.2 V output, use R1 (top) = 10.0 kΩ and R2 (bottom) = 10.0 kΩ, since V_OUT = 0.6 × (1 + R1/R2). TI specifies R2 = 10 kΩ as optimal for minimizing bias current error; higher values increase noise sensitivity, lower values raise quiescent loss.

How does the LM2830ZSD protect against overvoltage conditions on the output?

The LM2830ZSD includes dedicated output overvoltage protection (OVP) that monitors the FB pin. When FB voltage exceeds 0.69 V (15% above the 0.6 V internal reference), the internal PMOS switch is immediately disabled, halting energy transfer and allowing the output to decay safely through the load and catch diode-preventing damage to downstream 1.2 V or 3.3 V logic circuits.