TL1963AQKTTRQ1 - 1.5A 20V Adj LDO Auto Grade | Texas Instruments
N.º de pieza: TL1963AQKTTRQ1 ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $2.85 | $2,85 |
| 10 | $2.42 | $24,20 |
| 100 | $1.98 | $198,00 |
| 500 | $1.72 | $860,00 |
| 1.000 | $1.45 | $1.450,00 |
| 3.000 | $1.21 | $3.630,00 |
TL1963AQKTTRQ1 Descripción general
An LDO (Low-Dropout) linear regulator is a type of voltage regulator that maintains a stable output voltage even when the input-to-output voltage differential is small. LDO regulators belong to the linear regulator family, which in turn is a subset of voltage regulators and the broader power-management-IC category. Because they use a series pass element rather than switching, LDOs add no switching noise to the output, making them ideal for noise-sensitive analog and RF rails where a switching converter's ripple would otherwise be unacceptable.
Key features of the TL1963AQKTTRQ1 include 40 uVrms output noise (10 Hz to 100 kHz), 1 mA quiescent current that drops to less than 1 uA in shutdown, optimized fast transient response, and AEC-Q100 qualification for automotive applications. The device requires no protection diodes, supports reverse current flow when VIN drops below VOUT, and operates across a -40 C to +125 C automotive temperature range. The KTT (TO-263-5) package provides a low thermal resistance path that allows 1.5 A delivery in a compact surface-mount footprint.
Internally, the TL1963A-Q1 uses a PNP pass architecture with an NPN Darlington-style driver for high-current capability, a precision bandgap reference, and an internal current-limit / thermal-shutdown block. The architecture is optimized for transient response, meaning the loop bandwidth and output capacitance behavior allow fast recovery when the load current steps - critical for processor rails under dynamic loading.
Typical applications include automotive infotainment systems, ADAS sensor power, body electronics, point-of-load regulation after a buck converter, and industrial PLC analog supplies. The wide VIN range and high IOUT make it a strong candidate when the upstream bus is 12 V or 15 V and the load requires a clean 3.3 V, 5 V, or adjustable rail.
When designing with this device, place the input/output ceramic capacitors as close as possible to the IC and ensure proper PCB copper area for thermal dissipation. At 12 V to 5 V at 1.5 A, the regulator dissipates approximately 10.5 W, which mandates a substantial copper pour or heatsinking for reliable operation.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, providing engineering teams with a single reference for selection and BOM decisions.
Alternativas directas para TL1963AQKTTRQ1 — 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:
TL1963AKTTR
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
TL1963AKTTRG3
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
TPS7A4501KTTR
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
TL1963A-33KTTR
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
TL1963AQKTTRQ1 Valores máximos y características eléctricas
| Regulator Type | Low Dropout (LDO) |
| Output Polarity | Positive |
| Tipo de salida | Adjustable |
| Tensión de referencia | 1.21 V |
| Rango de tensión de salida | 1.21 V to 20 V |
| Corriente de salida máxima | 1.5 A |
| Rango de tensión de entrada | Up to 20 V |
| Tensión de dropout | 340 mV at 1.5 A |
| Ruido de salida | 40 uVrms (10 Hz to 100 kHz) |
| Corriente en reposo | 1 mA (typical), < 1 uA in shutdown |
| Temperatura de funcionamiento | -40 C to +125 C |
| Encapsulado | TO-263-5 (KTT / DDPAK-5) |
| Tipo de montaje | Surface Mount |
| Automotive Qualification | AEC-Q100 |
| Reverse Current Protection | Yes |
| Protection Diodes Required | No |
| Estado RoHS | Compliant |
| Lead Free | Yes |
Configuración de pines de TL1963AQKTTRQ1
| Pin 1 | IN — Input voltage supply |
| Pin 2 | EN — Enable / Shutdown (active-high) |
| Pin 3 | GND — Ground |
| Pin 4 | OUT — Regulated output voltage |
| Pin 5 | TAB — Thermal pad / exposed tab, internally connected to GND |
Aplicaciones típicas
TL1963AQKTTRQ1 es adecuado para 6 aplicacións: Automotive Infotainment Power Supply, ADAS Sensor and Camera Modules, Point-of-Load Regulation After Buck Converter, Industrial PLC Analog Supply Rail, Body Electronics and Lighting Modules, Portable and Battery-Powered Equipment.
Automotive Infotainment Power Supply
The TL1963AQKTTRQ1 fits automotive infotainment rails because of its 1.5 A output capability, 40 uVrms output noise, and AEC-Q100 qualification, while its 20 V input tolerance survives 12 V battery load-dump transients without damage. Placed downstream of a buck or directly on the 12 V bus, it provides a clean 5 V or 3.3 V rail for audio codecs, displays, and processors with negligible audible noise contribution. Fast transient response handles abrupt load steps from amplifiers and SoCs, while the KTT package spreads heat across PCB copper for reliable operation at full current. Compared to a switching post-regulator, the LDO adds no ripple but dissipates more power at high VIN-VOUT differentials.
Recomendado
ADAS Sensor and Camera Modules
ADAS camera and radar modules demand ultra-clean rails to preserve SNR of analog front-ends and high-speed serializers. The TL1963AQKTTRQ1's 40 uVrms noise floor from 10 Hz to 100 kHz is well below the noise contribution of most image sensors, and its 1.5 A headroom supplies serializer plus heater loads simultaneously. Reverse current protection prevents back-feeding when the module is hot-unplugged or experiences brownout, which is critical for automotive safety integrity. The AEC-Q100 grade plus -40 C to +125 C range covers underhood and behind-bumper thermal environments. Design-wise, place the device near the connector with a 10 uF ceramic output cap to minimize input trace inductance and stabilize the loop.
Recomendado
Point-of-Load Regulation After Buck Converter
Many automotive boards feed a 5 V or 3.3 V switching rail that still has 20-50 mV of switching ripple, which is unacceptable for precision analog, audio, or RF stages. The TL1963AQKTTRQ1 serves as a post-regulator, cleaning the ripple with its 40 uVrms noise and high PSRR. At 1.5 A output, it handles most analog and digital point-of-load demands without active cooling, while its 340 mV dropout keeps headroom margins usable even with the buck droop under load. Reverse current protection ensures the LDO does not back-feed the buck when VIN drops during cold-crank events.
Recomendado
Industrial PLC Analog Supply Rail
Industrial PLC analog front-ends, ADCs, and 4-20 mA loop transmitters need low-noise, regulated rails immune to 24 V industrial bus transients. The TL1963AQKTTRQ1's 20 V input rating accepts a regulated 24 V rail or post-buck voltage, while its 1.5 A output easily supplies multi-channel analog subsystems. The 40 uVrms noise does not degrade 16- or 18-bit ADC effective resolution, and the AEC-Q100 grade provides extra margin for harsh industrial environments with wide temperature swings. Use it with a TVS diode upstream for surge and a 10 uF X7R ceramic output cap for stability.
Recomendado
Body Electronics and Lighting Modules
Body control modules for lighting, mirrors, and seat controllers operate from 12 V automotive rails and need a robust linear regulator for low-current analog sections. The TL1963AQKTTRQ1 supplies up to 1.5 A for LED drivers, motor predrivers, or sensor bias, while its reverse current protection and AEC-Q100 grade ensure survival of load-dump and reverse-battery conditions. The KTT (TO-263-5) package allows simple hand-soldering or low-cost PCB fabrication, and the 340 mV dropout tolerates cold-crank dips on the 12 V bus down to ~9 V at the output.
Recomendado
Portable and Battery-Powered Equipment
In portable instrumentation powered from multi-cell batteries or USB, the TL1963AQKTTRQ1 serves as a low-noise post-regulator that extends battery life via its 1 mA quiescent current and < 1 uA shutdown mode. Reverse current protection prevents battery back-feed when the external supply is removed, while the 340 mV dropout minimizes the LDO's own dissipation at low VIN. Designers can use the enable/shutdown pin to power-gate sub-circuits, dropping quiescent current to under 1 uA during standby - ideal for handheld test gear, medical monitors, and IoT edge nodes.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para TL1963AQKTTRQ1 — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | TL1963AKTTR | TL1963AKTTRG3 | TPS7A4501KTTR | TL1963A-33KTTR |
|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | TO-263-5 (KTT) | TO-263-5 (KTT) - same | TO-263-5 (KTT) - same | TO-263-5 (KTT) - same | TO-263-5 (KTT) - same |
| Maximum Output Current | 1.5 A | 1.5 A | 1.5 A | 1.5 A | 1.5 A |
| Output Voltage | Adjustable 1.21 V to 20 V | Adjustable 1.21 V to 20 V | Adjustable 1.21 V to 20 V | Adjustable 1.21 V to 20 V | Fixed 3.3 V |
| Quiescent Current | 1 mA (1 uA shutdown) | 1 mA (1 uA shutdown) | 1 mA (1 uA shutdown) | 1.5 mA typical | 1 mA (1 uA shutdown) |
| AEC-Q100 Automotive Qualified | Yes | No (commercial) | No (commercial) | No (commercial) | No (commercial) |
| Operating Temperature Range | -40 C to +125 C | 0 C to +125 C (commercial) | 0 C to +125 C (commercial) | -40 C to +125 C | 0 C to +125 C |
| Approx. Unit Price (qty 1000) | $1.45 | ~$1.20 | ~$1.20 | ~$2.50 | ~$1.20 |
Diferenciadores clave
- AEC-Q100 automotive qualification with 1.5 A capability (frente a TL1963AKTTR)
- 40 uVrms ultra-low noise with 1.5 A current (frente a TPS7A4501KTTR)
- Reverse current protection (frente a TL1963A-33KTTR)
Notas de diseño
Estimated: at VIN = 12 V, VOUT = 5 V, IOUT = 1.5 A, the regulator dissipates approximately (12 V - 5 V) * 1.5 A = 10.5 W. The KTT (TO-263-5) package thermal resistance with a modest 1 sq inch of copper pour is on the order of 30 C/W, giving a junction temperature rise above ambient of about 315 C - well beyond the 150 C limit. Designers MUST use at least 3-4 sq inches of copper pour, an external heatsink, or reduce VIN to limit dissipation to roughly 3-4 W maximum. The thermal pad (pin 5 / tab) MUST be soldered to the PCB copper for proper heat extraction.
Place the input capacitor as close as possible to the VIN pin (pin 1) and the output capacitor as close as possible to the OUT pin (pin 4), using short, wide traces. The thermal pad must be soldered to a copper plane with multiple thermal vias to inner copper layers for two-sided heat extraction. Avoid routing high-current load traces near the feedback resistor divider to minimize noise coupling into the reference loop.
Do not omit the output capacitor - the LDO requires output capacitance for loop stability, and the ESR range is constrained (typically 0.05 ohm to 0.5 ohm effective series resistance for stable operation). Ensure VIN does not exceed 20 V (including load-dump transients in automotive systems - add a TVS diode upstream if necessary). When adjusting output voltage, use 1% tolerance feedback resistors to maintain output accuracy; the reference is 1.21 V with typical accuracy of plus or minus 1.5 percent.
Keep the ground return path short and direct. Use a star-ground topology where the LDO ground pin connects directly to the system ground plane at a single point, avoiding shared ground impedance with high-current switching converters. For AEC-Q100 designs, add ESD protection diodes (per IEC 61000-4-2) on input and output lines if the regulator is exposed to external connectors.
Información de cumplimiento
AEC-Q100 qualified for automotive applications. RoHS and lead-free per TI product page. Halogen-free status not explicitly stated in available data.
