LP2992AILD-5.0/NOPB - 250mA, 5V Fixed LDO | Texas Instruments
N.º de pieza: LP2992AILD-5.0/NOPB ✓ ActivoLP2992AILD-5.0/NOPB Descripción general
An LDO (Low-Dropout) linear regulator is a type of voltage regulator that maintains a stable output voltage even when the input voltage is very close to the output voltage. LDOs sit in the linear regulator family, which is a sub-category of voltage regulators and the broader power management IC class of semiconductors. They are preferred over switching regulators when low output noise, small solution size, and fast transient response outweigh the need for high efficiency at large input-to-output voltage differentials.
Key features of the LP2992AILD-5.0/NOPB include 30 µVrms output noise over the 10 Hz to 100 kHz bandwidth, sub-100 µA quiescent current at light load, internal soft-start to limit inrush current, and an enable pin for power sequencing. Protection features include overcurrent limit, thermal shutdown, and reverse-battery protection. The WSON-6 package with an exposed die-attached pad provides a thermal resistance (theta_JA) suitable for sustained 250 mA operation from industrial-grade temperature ranges.
The LP2992 is stable with very-low-ESR ceramic output capacitors as small as 1 µF, eliminating the need for tantalum or large electrolytic capacitors. Standard protection features such as overcurrent and overtemperature protection are integrated. The internal soft-start time and current limit protection reduce inrush current during startup, thus minimizing the input capacitance required.
Typical applications include USB peripherals, notebook and palmtop computers, mobile phones, battery-powered consumer electronics, and post-regulation for switching converters. The wide 2.2 V–16 V input range supports single-cell Li-Ion (with charger headroom), USB 5 V bus, and 12 V industrial rails. When designing with the LP2992AILD-5.0/NOPB, ensure adequate input-to-output voltage headroom to maintain regulation at 250 mA across the full operating temperature range. The exposed pad must be soldered to a sufficient copper pour for thermal dissipation.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Alternativas directas para LP2992AILD-5.0/NOPB — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
LP2992AILDX-5.0/NOPB
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LP2992AILD-5.0
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LP2992AILDR-5.0/NOPB
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
TPS7A2550DRVR
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LP2992AILD-5.0/NOPB Valores máximos y características eléctricas
| Regulator Topology | Low-Dropout (LDO), Positive Fixed |
| Tensión de salida | 5.0 V (fixed) |
| Output Voltage Accuracy | ±4.5% (including load/line/temperature per legacy data sheet) |
| Rango de tensión de entrada | 2.2 V to 16 V |
| Corriente de salida máxima | 250 mA |
| Tensión de dropout | 450 mV (typical at 250 mA) |
| Ruido de salida | 30 µVrms (10 Hz to 100 kHz) |
| Output Capacitor | 1 µF minimum ceramic (stable with low-ESR) |
| Patilla de habilitación | Yes |
| Protection Features | Overcurrent Limit, Thermal Shutdown, Reverse-Battery |
| Rango de temperatura de funcionamiento | -40 °C to +125 °C |
| Encapsulado | 6-WSON (NGD), 2.92 mm × 3.29 mm |
| Tipo de montaje | Surface Mount |
| Nivel MSL | 1 |
| Estado RoHS | Compliant |
| Lead-Free | Yes |
Configuración de pines de LP2992AILD-5.0/NOPB
| Pin 1 | VIN — Input supply voltage (2.2 V to 16 V) |
| Pin 2 | GND — Ground reference |
| Pin 3 | EN — Enable input (active high) |
| Pin 4 | NC — Not connected internally |
| Pin 5 | VOUT — Regulated 5.0 V output |
| Pin 6 | EP — Exposed thermal pad - solder to PCB ground plane for thermal dissipation |
Aplicaciones típicas
LP2992AILD-5.0/NOPB es adecuado para 6 aplicacións: USB Peripherals and Powered Hubs, Battery-Powered Portable Devices, Post-Regulation for Switching Converters, Industrial Sensor Signal Conditioning, Notebook and Palmtop Computer Sub-Rails, Audio Codec and DAC Power.
USB Peripherals and Powered Hubs
The LP2992AILD-5.0/NOPB is well matched to USB peripheral and powered-hub designs where the upstream 5 V VBUS rail feeds a downstream regulated 5 V rail for noise-sensitive analog or sensor circuitry. The LDO's 30 µVrms output noise and 16 V absolute maximum input comfortably accept the USB VBUS range (4.75 V to 5.25 V nominal, 6 V transient) without damage. Placed after the upstream ferrite bead and a 1 µF ceramic bypass, it provides a clean post-regulated 5 V to local analog blocks at up to 250 mA. The WSON-6 (NGD) footprint is small enough to fit next to USB connector shields.
Recomendado
Battery-Powered Portable Devices
The LP2992AILD-5.0/NOPB is an excellent match for battery-powered portable devices because of its low quiescent current, low dropout, and stable operation with tiny ceramic output capacitors. Drawing power from a single-cell Li-Ion battery (3.0 V to 4.2 V), the LDO delivers 5.0 V when VOUT is derived via a charge-pump pre-stage, or directly when used as a 3.3 V or 3.0 V variant (sibling parts LP2992AILD-3.3/NOPB). The 450 mV typical dropout at 250 mA extends usable battery runtime by allowing the system to operate closer to the discharge cutoff voltage. The enable pin supports low-power shutdown for handheld sleep modes.
Recomendado
Post-Regulation for Switching Converters
Placing the LP2992AILD-5.0/NOPB downstream of a switching DC-DC converter provides a low-noise 5 V rail for analog/RF blocks while keeping the bulk of the power chain highly efficient. The LDO's 30 µVrms output noise and 60+ dB power-supply rejection ratio (PSRR) attenuate the residual switching ripple that escapes the upstream buck regulator. This two-stage architecture is common in communications infrastructure, where the buck converter handles bulk conversion and the LDO delivers clean rails to PLLs, VCOs, ADCs, and DACs. The WSON-6 (NGD) package is small enough to mount directly at the load point.
Recomendado
Industrial Sensor Signal Conditioning
The LP2992AILD-5.0/NOPB powers analog front-end signal-conditioning circuits in industrial sensor modules, where its wide 2.2 V to 16 V input range accepts 12 V and 24 V industrial bus rails. The 250 mA output drives op-amps, instrumentation amplifiers, and ADC references that require clean supply rails for accurate measurement of strain-gauge, thermocouple, or 4-20 mA current-loop signals. The thermal shutdown and overcurrent limit provide robust protection against field wiring faults. The -40 °C to +125 °C operating temperature range covers harsh industrial environments without derating.
Recomendado
Notebook and Palmtop Computer Sub-Rails
The LP2992AILD-5.0/NOPB is a classic fit for notebook and palmtop computer sub-rails that require a clean 5 V supply derived from the 7 V to 16 V main battery bus. The LDO supplies secondary analog and I/O functions while the main CPU and DRAM are powered by more efficient switching regulators. The 250 mA output covers USB ports, audio codecs, and keypad controllers. The enable pin allows the system BIOS or EC to gate power to peripherals during sleep states. The exposed thermal pad and WSON-6 footprint enable direct attachment to the motherboard main ground plane.
Recomendado
Audio Codec and DAC Power
The LP2992AILD-5.0/NOPB is suitable for powering audio codecs and low-power stereo DACs in portable audio applications. The 30 µVrms output noise floor ensures that the LDO contributes less than 1 LSB of noise to a 16-bit audio stream at full scale. Placed between the system 5 V rail and the codec/DVDD pin, it eliminates high-frequency switching ripple from upstream converters that could otherwise be heard as a faint whine through headphones. The fixed 5.0 V output matches the typical AVDD requirement of codecs like the TLV320AIC3100 family. The small WSON-6 footprint fits next to the codec QFN on a typical audio daughter card.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para LP2992AILD-5.0/NOPB — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | LP2992AILDX-5.0/NOPB | LP2992AILD-5.0 | LP2992AILDR-5.0/NOPB | TPS7A2550DRVR |
|---|---|---|---|---|---|
| Package | 6-WSON (NGD) | 6-WSON (NGD) - same | 6-WSON (NGD) - same | 6-WSON (NGD) - same | 6-WSON (WSON-6) - same form factor |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Output Voltage | 5.0 V | 5.0 V | 5.0 V | 5.0 V | 5.0 V |
| Maximum Output Current | 250 mA | 250 mA | 250 mA | 250 mA | 200 mA (-20%) |
| Input Voltage Range | 2.2 V to 16 V | 2.2 V to 16 V | 2.2 V to 16 V | 2.2 V to 16 V | Up to 6 V |
| Enable Pin | Yes | Yes | Yes | Yes | Yes |
| Package Finish | Pb-free matte tin (NOPB) | Pb-free matte tin (NOPB) | SnPb (non-NOPB) | Pb-free matte tin (NOPB) | Pb-free (modern TI finish) |
Diferenciadores clave
- Ultra-low 30 µVrms output noise suitable for analog/RF rails (frente a Generic 5V/250mA LDO without noise specification)
- Wide 2.2 V to 16 V input range supports USB, 12 V, and battery buses (frente a TPS7A2550DRVR)
- Stable with 1 µF ceramic output capacitor - no tantalum required (frente a Legacy LDOs requiring 10 µF tantalum output)
- Enable pin and reverse-battery protection integrated (frente a Basic LDOs without enable or reverse protection)
Notas de diseño
The LP2992AILD-5.0/NOPB requires a 1 µF (or larger) low-ESR ceramic output capacitor placed within 5 mm of the VOUT pin for stability and noise filtering. Place a 1 µF X7R/X5R MLCC on the VIN pin as well, with both capacitors referenced to the GND pin using wide, short traces. The exposed thermal pad (DAP) on the underside of the WSON-6 package must be soldered to a PCB ground pour of at least 25 mm² to maintain the thermal resistance specified in the datasheet. Skip the DAP solder connection and the junction temperature will exceed the thermal shutdown threshold at high load and ambient temperature.
Estimated: At VIN = 12 V, VOUT = 5.0 V, and IOUT = 250 mA, the LP2992AILD-5.0/NOPB dissipates (12 - 5.0) × 0.25 = 1.75 W. With the WSON-6 theta_JA of approximately 50 °C/W on a standard JEDEC 4-layer test board (per LP2992 datasheet thermal table), the junction temperature rise is 1.75 × 50 = 87.5 °C above ambient, so at 25 °C ambient the junction reaches 112.5 °C - within the 125 °C maximum but with little margin. For higher VIN (e.g., 16 V), dissipation rises to 2.75 W and junction temperature climbs above 137 °C, so thermal shutdown may trigger. Add a copper pour or thermal via array under the DAP for higher-VIN applications.
Do not apply input voltages above 16 V absolute maximum - the LP2992 does not include input overvoltage protection and will be damaged by transients above this limit. Use a TVS or Zener clamp on the input for 12 V industrial or automotive environments where inductive kick can exceed 16 V. Do not operate the part without a load - some LDO datasheets specify a minimum load for stability, but the LP2992 is stable with no load thanks to its VIP architecture. Do not use a tantalum or electrolytic output capacitor with high ESR - the regulator requires low-ESR ceramic for proper phase margin and may oscillate with a 1 Ω or higher ESR.
Keep the high-current ground return path (VOUT capacitor GND and load GND) separate from the signal ground reference of the feedback network (on the LP2992 this is the GND pin) to avoid ground bounce coupling into the reference. On a 2-layer board, route the high-current return on the bottom side directly under the LDO, and keep the analog GND reference on the top side connected to the GND pin via a short trace. Place the input capacitor as close as possible to VIN, with a via-free connection to minimize parasitic inductance. The exposed pad should be tied to GND with at least four thermal vias (8-mil drill, 12-mil pad) connecting to the bottom-side ground plane.
Información de cumplimiento
Pb-free matte tin finish (NOPB suffix) per TI datasheet. RoHS compliant. Not AEC-Q100 qualified - this is the standard industrial-grade version; check the LP2992Q variant if automotive qualification is required. Halogen-free status not explicitly listed in the verified web data.
