Texas Instruments LM2830XMF/NOPB

Overview

LM2830XMF/NOPB 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 0.6 V internal reference, 1.6 MHz fixed switching frequency, and 130 mΩ integrated PMOS switch. It regulates 3.0–5.5 V input to adjustable 0.6–4.5 V output for compact point-of-load power in USB-powered devices and set-top boxes.

For engineers reviewing the LM2830XMF/NOPB datasheet, LM2830XMF/NOPB pinout, LM2830XMF/NOPB application, or LM2830XMF/NOPB equivalent, key selection criteria include its 1.6 MHz operation enabling ultra-small external components, internal soft-start limiting inrush current, thermal shutdown at 165°C, undervoltage lockout with 430 mV hysteresis, and 30 nA shutdown quiescent current.

Technical Context

The LM2830XMF/NOPB employs constant-frequency current-mode control with internal compensation, using a 0.6 V reference and feedback divider to regulate output voltage. Its 1.6 MHz oscillator enables stable operation with ceramic capacitors and sub-4 µH inductors while maintaining fast transient response.

It integrates a 130 mΩ PMOS high-side switch, cycle-by-cycle current limit (1.2–1.75 A), overvoltage protection triggered at 15% above VREF, and logic-level enable with 0.4 V shutdown threshold. The device enters thermal shutdown at 165°C and resumes regulation only after junction temperature falls to ~150°C.

Key Specifications

Pinout & Package

LM2830XMF/NOPB uses a 5-pin SOT-23 package (2.90 mm × 1.60 mm) with exposed pad not connected internally; thermal performance relies on PCB copper area under the package body.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS62231DRVR, LM2830XMF/NOPB offers external diode control for optimized forward voltage trade-offs, while RT8059GJ6 provides lower unit cost at the expense of missing overvoltage and refined thermal protection-making LM2830XMF/NOPB optimal for reliability-critical USB and set-top box designs requiring comprehensive fault coverage.

Availability

LM2830XMF/NOPB is available at Aetrix Electronics and suitable for USB powered devices, set-top boxes, HDD core power, and local 5-V to Vcore converters requiring stable component supply, long-term lifecycle support, and automotive-grade traceability.

Supply support for LM2830XMF/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 company headquartered in Dallas, Texas, designing and manufacturing analog and embedded processing chips for industrial, automotive, and personal electronics markets.

The LM2830XMF/NOPB belongs to TI's high-frequency DC-DC regulator product line, engineered specifically for space-constrained, efficiency-critical point-of-load applications where minimal external components and robust protection are mandatory.

FAQ

What is the recommended input capacitor for LM2830XMF/NOPB?

The LM2830XMF/NOPB datasheet specifies a 22 µF X5R ceramic capacitor (e.g., TDK C3216X5ROJ226M) as the recommended input capacitor. This value ensures low impedance at 1.6 MHz, minimizes VIN droop during switching transients, and handles RMS input current up to ~0.5 A. Placement must be within 3 mm of VIN and GND pins with short, wide traces to reduce ESL.

Does LM2830XMF/NOPB require an external catch diode?

Yes, LM2830XMF/NOPB requires an external Schottky catch diode (e.g., Toshiba CRS08) connected between SW and GND. Unlike synchronous buck regulators, it uses an internal PMOS high-side switch only; the diode provides the return path for inductor current during the off-time. Diode selection must meet 1.5 A average current rating and ≤0.7 V forward voltage at 1 A.

Can LM2830XMF/NOPB generate a 1.2 V output?

Yes, LM2830XMF/NOPB can generate a precise 1.2 V output using a resistor divider on the FB pin. With V_REF = 0.6 V, setting R1 = R2 = 15.0 kΩ yields V_OUT = 0.6 V × (1 + 15k/15k) = 1.2 V. The 2% reference tolerance and low FB bias current (≤100 nA) ensure output accuracy remains within ±1.5% across temperature and load.

What is the thermal shutdown behavior of LM2830XMF/NOPB?

LM2830XMF/NOPB disables the internal PMOS switch when junction temperature reaches 165°C, entering thermal shutdown. It remains latched off until junction temperature cools to approximately 150°C, at which point normal regulation resumes automatically. This hysteresis prevents cycling near the trip point and protects against sustained overload or poor PCB thermal design.

Is LM2830XMF/NOPB pin-compatible with other LM2830 variants?

No, LM2830XMF/NOPB is not pin-compatible with LM2830Z variants or WSON-packaged versions. It uses the 5-pin SOT-23 footprint (VIN, SW, GND, FB, EN), whereas LM2830Z shares the same package but differs in switching frequency (3.0 MHz), and WSON variants have 6 pins including separate VINA/VIND. PCB layout must match the exact variant's pinout and thermal pad requirements.