TPS7A9201DSKT - 2A Low-Noise High-PSRR LDO | Texas Instruments
N.º de pieza: TPS7A9201DSKT ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $3.42 | $3,42 |
| 10 | $3.08 | $30,80 |
| 100 | $2.61 | $261,00 |
| 500 | $2.27 | $1.135,00 |
| 1.000 | $1.95 | $1.950,00 |
TPS7A9201DSKT Descripción general
An LDO (Low-Dropout) linear regulator is a DC voltage regulator that maintains a stable output voltage even when the input voltage approaches the output voltage (small VIN-VOUT headroom). LDOs are a subclass of linear regulators, which in turn fall under voltage regulators within the broader power management IC (PMIC) hierarchy. Unlike switching converters, an LDO dissipates the difference between input and output power as heat, so its efficiency is VOUT/VIN, but it adds no switching noise to the output - making it ideal for noise-sensitive analog and RF rails.
The TPS7A9201DSKT accepts an input voltage from 1.4 V to 6.5 V and produces an adjustable output from 0.8 V to 5.2 V set by external resistors. It delivers 4.6 µVRMS output noise (20 Hz-100 kHz), high PSRR, and 1% output voltage accuracy over line, load, and temperature. Internal soft-start and current-limit features reduce inrush stress and protect the device during output short events.
The regulator uses a PMOS pass-element architecture with a precision bandgap reference, achieving low-noise performance suitable for RF, audio, and high-speed data-converter applications. The exposed thermal pad (DSK package) keeps junction temperature rise manageable at 2-A loads.
Typical applications include powering FPGA and ASIC core rails, RF transceiver VCO/PLL supplies, high-speed ADC and DAC reference rails, audio codec power, and post-regulation following a switching converter in point-of-load designs.
When designing with this part, place the input and output ceramic capacitors as close as possible to the IC pins and lay out a copper pour under the exposed pad for thermal relief. Verify that the worst-case VIN-VOUT dropout stays below 180 mV at the expected minimum load.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers a single reference for TPS7A9201DSKT selection.
Alternativas directas para TPS7A9201DSKT — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
TPS7A9201DSKR
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
TPS7A9101DSKR
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
TPS7A9001DSKR
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
TLV75201PDSQR
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
TPS7A9201DSKT Valores máximos y características eléctricas
| Product Type | LDO Linear Voltage Regulator (Positive, Adjustable) |
| Manufacturer | Texas Instruments |
| Series | TPS7A92 |
| Configuración de salida | Positive, Adjustable |
| Número de salidas | 1 |
| Corriente de salida máxima | 2 A |
| Rango de tensión de entrada | 1.4 V to 6.5 V |
| Rango de tensión de salida | 0.8 V to 5.2 V |
| Maximum Dropout Voltage | 180 mV at 2 A |
| Ruido de salida | 4.6 µVRMS (20 Hz to 100 kHz) |
| Output Voltage Accuracy | 1% (over line, load, temperature) |
| PSRR | High PSRR (datasheet graph; consult datasheet for frequency) |
| Arranque suave | Internal soft-start |
| Limitación de corriente | Internal current limit |
| Apagado térmico | Yes |
| Rango de temperatura de funcionamiento | -40C to +125C |
| Encapsulado | 10-WSON / 10-SON (DSK) 2.5x2.5 mm with exposed pad |
| Tipo de montaje | Surface Mount |
| Estado RoHS | Compliant |
Configuración de pines de TPS7A9201DSKT
| Pin 1 | IN — Input supply voltage (1.4 V to 6.5 V) |
| Pin 2 | IN — Input supply voltage (bypass/decoupling pin) |
| Pin 3 | EN — Enable input (active-high) |
| Pin 4 | NR/SS — Noise-reduction / soft-start capacitor |
| Pin 5 | GND — Ground |
| Pin 6 | FB — Feedback (external resistor divider sets VOUT) |
| Pin 7 | OUT — Regulated output voltage |
| Pin 8 | OUT — Regulated output voltage (high-current) |
| Pin 9 | PG — Power-good open-drain output |
| Pin 10 | OUT — Regulated output voltage |
| Pin EP | Thermal Pad — Exposed thermal pad, connect to GND plane |
Aplicaciones típicas
TPS7A9201DSKT es adecuado para 6 aplicacións: FPGA/ASIC Core and Auxiliary Rail, RF Transceiver PLL/VCO Power Supply, High-Speed ADC/DAC Reference Power, Audio Codec and Headphone Amplifier Supply, Industrial 5 V Point-of-Load Regulation, Portable/Battery-Powered Low-Dropout Rail.
FPGA/ASIC Core and Auxiliary Rail
The TPS7A9201DSKT is well suited for powering FPGA core and auxiliary rails because its 2 A output current handles transient bursts from logic switching, and its 0.8 V-5.2 V adjustable output covers common 0.85 V, 1.0 V, 1.2 V, 1.8 V, and 2.5 V setpoints used by Xilinx, Intel, and Lattice FPGAs. With 4.6 µVRMS noise and high PSRR, it cleans up ripple from upstream switching converters feeding the digital rail. Designers typically place it as a post-regulator after a 3.3 V or 5 V buck, yielding sub-1% accurate rails. The 10-WSON (DSK) 2.5x2.5 mm footprint saves board area in dense FPGA-based designs.
Recomendado
RF Transceiver PLL/VCO Power Supply
RF transceivers demand ultra-clean rails for PLL synthesizers and VCOs, since supply noise directly modulates phase noise. The TPS7A9201DSKT's 4.6 µVRMS noise floor and high PSRR reject switching ripple from upstream rails, making it ideal for powering PLL/VCO domains in sub-6 GHz radios. Its 2 A capability supports multiple VCOs and mixer blocks from a single LDO. The 1.4 V-6.5 V input range covers typical 3.3 V and 5 V system buses; the 0.8 V-5.2 V output range covers typical LDO setpoints of 2.8 V, 3.0 V, and 3.3 V for RF chains.
Recomendado
High-Speed ADC/DAC Reference Power
Precision high-speed ADCs and DACs require low-noise reference rails to preserve SNR and linearity. The TPS7A9201DSKT's 4.6 µVRMS noise and 1% output accuracy make it a strong choice for REF inputs on 16-bit+ converters and the AVDD rail on audio DACs. Its 2 A capacity supports simultaneous reference and analog domains. Designers typically pair the LDO with a 0.1 µF + 10 µF ceramic capacitor network near the ADC pins; the exposed thermal pad of the DSK package keeps the junction temperature low at moderate VIN-VOUT deltas.
Recomendado
Audio Codec and Headphone Amplifier Supply
Audio codecs and headphone amplifiers are highly sensitive to power-rail noise, which can couple directly into the audio band. The TPS7A9201DSKT's 4.6 µVRMS noise and high PSRR keep the noise floor of the audio path below audibility, while its 2 A output supports both codec analog supply and headphone driver from a single LDO. The 0.8 V-5.2 V output range covers typical 1.8 V, 2.5 V, and 3.3 V audio rails. Place the LDO close to the codec's AVDD pin with low-ESR ceramic output capacitors.
Recomendado
Industrial 5 V Point-of-Load Regulation
Industrial 24 V or 5 V bus systems commonly use a downstream buck followed by an LDO for noise-sensitive analog domains. The TPS7A9201DSKT handles the post-regulation role: take 5 V from a buck and produce a clean 1.8 V, 2.5 V, or 3.3 V rail for analog front ends, sensors, or signal chain components. Its 1.4 V-6.5 V input range handles 5 V buses directly, and its 1% accuracy meets industrial analog tolerance. The 10-WSON package and -40C to +125C rating suit factory-floor temperature ranges.
Recomendado
Portable/Battery-Powered Low-Dropout Rail
The TPS7A9201DSKT's low 1.4 V minimum input supports single-cell Li-ion (3.0 V-4.2 V) and 1S LiFePO4 battery chemistries, while its 180 mV maximum dropout extends usable battery life near end-of-discharge. The 2 A output can power MCUs, radios, and sensors simultaneously in portable devices. Its small 2.5x2.5 mm WSON footprint is critical for wearables and handheld designs where board space is at a premium. The exposed thermal pad aids heat spreading during high-current discharge pulses.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para TPS7A9201DSKT — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | TPS7A9201DSKR | TPS7A9101DSKR | TPS7A9001DSKR | TLV75201PDSQR |
|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 10-WSON (DSK) 2.5x2.5 mm | 10-WSON (DSK) - same | 10-WSON (DSK) - same | 10-WSON (DSK) - same | 10-WSON - same |
| Maximum Output Current | 2 A | 2 A | 1 A | 0.5 A | 1 A |
| Input Voltage Range | 1.4 V to 6.5 V | 1.4 V to 6.5 V | 1.4 V to 6.5 V | 1.4 V to 6.5 V | 1.5 V to 6.5 V |
| Output Voltage Range | 0.8 V to 5.2 V | 0.8 V to 5.2 V | 0.8 V to 5.2 V | 0.8 V to 5.7 V | 0.8 V to 5.2 V |
| Output Accuracy | 1% | 1% | 1% | 1% | 1.5% |
Diferenciadores clave
- 2 A output in a 2.5x2.5 mm WSON footprint (frente a TPS7A9101DSKR (1 A))
- Wide output voltage range up to 5.2 V (frente a TPS7A9001DSKR (0.5 A))
- Lower quiescent current vs switching regulator alternatives (frente a TLV75201PDSQR)
Notas de diseño
Estimated: at VIN=5 V, VOUT=3.3 V, and 2 A load, power dissipation is approximately (5-3.3)*2 = 3.4 W. The 10-WSON DSK package exposed thermal pad has theta_JA around 50 C/W on a 1-oz 4-layer PCB with a 0.5 sq-in copper pour, yielding ~170C junction temperature rise - exceeds the 125C rating. To stay in regulation, either lower VIN-VOUT drop, increase PCB copper area under the EP, or use a multi-layer board with internal ground planes. At VIN=3.3 V and VOUT=2.5 V with 2 A load (0.8 V drop), dissipation is ~1.6 W, which is comfortable at the same thermal resistance.
Place the input and output ceramic capacitors (typically 1 µF X7R minimum, 10 µF recommended) as close as possible to the IC pins to minimize parasitic inductance. Tie the exposed thermal pad (EP) to a large GND copper pour on the top layer and stitch vias to internal GND planes to spread heat. Keep the FB resistor divider traces short and away from switching nodes to avoid noise injection into the feedback path. Add a 0.1 µF capacitor close to IN for high-frequency decoupling.
Do not operate above 6.5 V on IN - permanent damage will occur. Do not allow VOUT to exceed 5.2 V when set by external resistors. The PG pin is open-drain and requires a pull-up resistor (typically 10 kOhm to VOUT or logic rail). The NR/SS capacitor value sets soft-start time and noise bandwidth - do not leave this pin floating; typical value is 10 nF for ~1 ms start-up. If unused, tie EN to IN through a 100 kOhm resistor to ensure predictable power-up.
Route the input current loop (IN to capacitor to GND) and the output current loop (OUT to capacitor to GND) as tight and physically separated as possible to avoid noise coupling from input ripple into the output. Place the FB resistor divider on the PCB layer nearest to the FB pin and ground the resistor divider's bottom to the analog ground (not the power ground return of the load). This prevents load-current-induced ground bounce from corrupting the feedback reference.
Información de cumplimiento
RoHS and REACH compliant per TI product page. Standard grade; the -Q1 suffix variant (TPS7A9201QDSKRQ1) is AEC-Q100 qualified for automotive - this DSKT base part is not automotive qualified.
