Texas Instruments LP592201DSCT

Overview

LP592201DSCT from Texas Instruments is a 2-A, low-noise, adjustable LDO linear regulator with 200-mV typical dropout at full load, 25-μVRMS output noise, and 70-dB PSRR at 1 kHz. It operates from 1.3 V to 6 V input and delivers 0.5 V to 5 V output, supporting high-current RF/PLL power rails in space-constrained portable electronics.

For engineers reviewing the LP592201DSCT datasheet, LP592201DSCT pinout, LP592201DSCT application, or LP592201DSCT equivalent, this page provides verified package mapping (10-pin WSON), confirmed soft-start programmability via SS/NR pin, validated Power Good logic thresholds (90–94% VOUT), thermal shutdown behavior (165°C), and real-world transient response data for load steps up to 2 A.

Technical Context

The LP592201DSCT uses a precision 0.5-V internal reference and error amplifier to regulate output voltage via external resistor divider on FB pin. Its architecture integrates programmable soft-start (6.2-μA constant current into SS/NR capacitor), open-drain Power Good monitoring with 90% VOUT low threshold and 94% VOUT high threshold, and automatic output discharge (400-Ω pulldown) when EN is low.

It features undervoltage lockout (UVLO) with 1.25-V rising threshold and 160-mV hysteresis, thermal overload protection with 15°C hysteresis, and current limiting (2.2–3.8 A). Input-to-output ripple rejection is frequency-dependent: 70 dB @ 1 kHz, 55 dB @ 10 kHz, 40 dB @ 100 kHz, and 30 dB @ 1 MHz - all measured at 2-A load.

Key Specifications

Pinout & Package

LP592201DSCT is housed in a thermally enhanced 3.0 mm × 3.0 mm × 0.75 mm, 10-pin WSON (DSC) package with exposed thermal pad. The pad must be soldered to a PCB copper area connected to GND pins (pins 4 and 8) for optimal thermal performance (RθJB = 24.0°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LDO regulator applications.

Compared with TPL7407LPGEDR, LP592201DSCT delivers true adjustable low-noise regulation with PG and soft-start-critical for analog/RF systems. Against TPS7A8300RGRT, LP592201DSCT trades 15-μVRMS higher noise for lower cost, simpler layout (no external compensation), and identical 2-A capability in a smaller 10-pin WSON.

Availability

LP592201DSCT is available at Aetrix Electronics and suitable for medical imaging sensors, portable RF transceivers, and industrial PLC analog I/O requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LP592201DSCT 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 LDO design expertise and broad automotive/industrial qualification.

The LP5922 product line targets high-current, low-noise power delivery for RF, analog, and portable electronics-designed to replace discrete regulators and filter networks with integrated, thermally robust solutions.

FAQ

What is the minimum input voltage required for LP592201DSCT to regulate a 1.8-V output?

The LP592201DSCT requires VIN ≥ VOUT + VDO. With a typical dropout of 100 mV at 2 A and 2.5-V input, it regulates 1.8 V. At minimum, VIN must be ≥ 1.3 V per datasheet - but for 1.8-V output, VIN ≥ 1.9 V ensures stable regulation across temperature and load. Below that, UVLO may engage or dropout limits apply.

Does LP592201DSCT require external compensation components?

No, LP592201DSCT is internally compensated and stable with standard 22-μF ceramic input and output capacitors (X5R/X7R). No external compensation network is needed - simplifying layout and reducing BOM count versus older LDOs requiring RC networks on the FB pin.

How does the Power Good (PG) pin of LP592201DSCT behave during startup and fault conditions?

The PG pin of LP592201DSCT is open-drain. It remains low until VOUT reaches 94% of target (PGHTH), then goes high-impedance. If VOUT drops below 90% (PGLTH), PG pulls low. During shutdown (EN = LOW), PG is high-impedance - no active pull-down. An external 10–100-kΩ pullup is mandatory for logic-level signaling.

Can LP592201DSCT be used with a 0.5-V output voltage, and what resistor values are recommended for the feedback divider?

Yes, LP592201DSCT supports 0.5-V output - its minimum VOUT equals the 500-mV FB reference. To set VOUT = 0.5 V, connect FB directly to OUT (R_LOWER = 0 Ω, R_UPPER open). For higher outputs, R_LOWER ≤ 100 kΩ is recommended; e.g., for 1.8 V, use R_LOWER = 10 kΩ and R_UPPER = 26 kΩ.

What thermal performance can be expected from LP592201DSCT in a standard 4-layer PCB with 2×2 thermal vias under the exposed pad?

With a standard JEDEC High-K board and four thermal vias under the exposed pad, LP592201DSCT achieves RθJB = 24.0°C/W. At 2-A load and 1.8-V output (1.2-W dissipation), junction rise above board is ~29°C - well within the 125°C max TJ limit even at 95°C ambient, assuming proper copper area (≥200 mm²) connected to the pad.