TPS73501DRBR - 500mA Low-IQ High-PSRR LDO | Texas Instruments
N.º de pieza: TPS73501DRBR ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $1.45 | $1,45 |
| 10 | $1.31 | $13,10 |
| 100 | $1.06 | $106,00 |
| 500 | $0.85 | $425,00 |
| 1.000 | $0.68 | $680,00 |
TPS73501DRBR 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. It is a subclass of linear regulators that use a pass transistor operating in its linear region to drop excess voltage. LDOs are essential power management ICs providing clean, low-noise supply rails to sensitive analog and digital circuits within a broader power management architecture.
Key features include a low quiescent current of 45 uA (typical), high PSRR of 68 dB at 1 kHz, and low output noise. The enable pin allows power sequencing and shutdown to reduce power consumption. Overcurrent and thermal shutdown protection ensure robust operation in demanding environments.
The TPS73501DRBR uses a CMOS process technology, contributing to low quiescent current and high efficiency at light loads. The adjustable output is set with an external resistor divider, providing design flexibility. The VSON package with an exposed thermal pad enhances heat dissipation, allowing the regulator to deliver up to 500 mA with proper PCB layout. Fast start-up and excellent line and load transient response round out the AC performance.
Typical applications include powering microcontrollers, sensors, and RF transceivers in battery-operated devices, as well as providing clean supply rails for audio and precision analog circuits. The low dropout voltage of 0.5 V at 500 mA ensures efficient operation even with small input-to-output voltage differences.
When designing with this device, ensure adequate input and output capacitance (typically 1 uF) placed close to the pins. The enable pin can be tied to VIN if not used. For optimal noise performance, a noise bypass capacitor can be added to the NR pin.
Alternativas directas para TPS73501DRBR — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con TPS73501DRBR (mismo factor de forma y huella) — difiere en Output Type, Package.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
TPS73501QDRBRQ1
✅ Sustitución directa✓ En stock
$1.12 / unidad
Ver hoja de datos →TPS73601DRBR
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
TPS73533DRBR
⚡ Mismo encapsulado ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
TPS73525DRBRG4
⚡ Mismo encapsulado📋 Alternativa de referencia (no en el catálogo)
TPS73633DRBRG4
⚡ Mismo encapsulado📋 Alternativa de referencia (no en el catálogo)
TPS73501DRBR Valores máximos y características eléctricas
| Tipo de salida | Adjustable |
| Rango de tensión de salida | 1.25 V to 6 V |
| Corriente de salida máxima | 500 mA |
| Rango de tensión de entrada | 2.7 V to 6.5 V |
| Corriente en reposo | 45 uA |
| PSRR | 68 dB at 1 kHz |
| Tensión de dropout | 0.5 V at 500 mA |
| Patilla de habilitación | Yes |
| Protection Features | Overcurrent, Thermal Shutdown |
| Temperatura de funcionamiento | -40C to +125C |
| Encapsulado | 8-SON (DRB) 3x3 mm |
| Tipo de montaje | Surface Mount |
| Process Technology | CMOS |
| Ruido de salida | Ultra-low noise (NR pin bypass capacitor supported) |
| Transient Response | Fast line and load transient response |
| Fixed Output Versions | 1.2 V to 4.3 V available in family |
Configuración de pines de TPS73501DRBR
| Pin 1 | EN — Enable input, active high; tie to VIN if unused |
| Pin 2 | NR — Noise reduction / soft-start bypass capacitor pin |
| Pin 3 | GND — Ground |
| Pin 4 | FB/ADJ — Feedback pin for adjustable output, connect to resistor divider |
| Pin 5 | OUT — Regulated output voltage |
| Pin 6 | OUT — Regulated output voltage (connected) |
| Pin 7 | IN — Input supply, 2.7 V to 6.5 V |
| Pin 8 | IN — Input supply (connected) |
| Pin PAD | Thermal Pad — Exposed pad, connect to GND for heat dissipation |
Aplicaciones típicas
TPS73501DRBR es adecuado para 6 aplicacións: Battery-Powered Portable Devices, RF Transceiver Power Supply, Precision Analog and Sensor Rails, Industrial Control Systems, Audio Signal Chains, Automotive Subsystem Power.
Battery-Powered Portable Devices
The TPS73501DRBR fits battery-powered products because its 45 uA quiescent current minimizes standby drain, directly extending battery life, while the enable pin allows the system MCU to gate the rail entirely. Operating from 2.7 V input, it supports single-cell Li-Ion designs down to end-of-discharge voltage. Placed between the battery and a 1.8 V to 3.3 V sensor or MCU rail with 1 uF ceramics, it adds no switching noise and its 500 mA capability covers radio transmit bursts, a quantified benefit over lower-current LDOs in wearables and IoT nodes.
Recomendado
RF Transceiver Power Supply
With 68 dB PSRR at 1 kHz and ultra-low output noise, the TPS73501DRBR is well suited to powering RF transceivers and synthesizers where supply ripple converts directly to phase noise. In a typical topology, a switching regulator first steps down the battery, and the TPS73501 cleans the rail feeding the transceiver VCO/PLL pin, with a noise-bypass capacitor on the NR pin further narrowing the noise bandwidth. The high PSRR attenuates switching ripple by roughly three orders of magnitude, protecting receiver sensitivity in IoT, Zigbee, and sub-GHz radio designs.
Recomendado
Precision Analog and Sensor Rails
Precision ADCs, operational amplifiers, and sensors demand supply rails with low noise and stable output under load steps. The TPS73501DRBR delivers ultra-low output noise and excellent line/load transient response, so an ADC reference-supply or op-amp rail stays clean even when adjacent digital loads switch. Its adjustable output from 1.25 V to 6 V lets designers optimize ADC supply headroom for noise versus power. Adding a 10 nF NR capacitor suppresses noise further, and the exposed thermal pad of the DRB package keeps thermal drift minimal for measurement accuracy.
Recomendado
Industrial Control Systems
In industrial environments with -40C to +125C ambient demands, the TPS73501DRBR supplies clean point-of-load power for MCUs, communication transceivers, and analog front ends. Its 68 dB PSRR rejects ripple from factory-floor switching supplies, while overcurrent and thermal shutdown protection tolerate fault conditions. The 3x3 mm DRB package fits dense control boards, and the automotive-qualified TPS73501QDRBRQ1 variant enables reuse of the same footprint in harsher, certified systems. Dropout of 0.5 V at 500 mA allows efficient post-regulation from a 5 V industrial rail.
Recomendado
Audio Signal Chains
Audio DACs, headphone amplifiers, and microphone preamps benefit from the TPS73501DRBR's ultra-low output noise and high PSRR, since supply noise couples directly into the audio path and degrades signal-to-noise ratio. The part typically sits after a boost or buck converter powering a portable audio player, feeding the analog supply pin of the codec. With 68 dB ripple rejection and the NR pin noise-bypass feature, the resulting rail noise stays below audible thresholds, and the 500 mA rating covers speaker-amplifier quiescent and peak demands in compact designs.
Recomendado
Automotive Subsystem Power
For automotive electronics requiring AEC-Q100 components, the pin-compatible TPS73501QDRBRQ1 variant shares the identical DRB package, enabling the same PCB footprint across consumer and automotive builds. Typical uses include powering ADAS sensors, body-control MCU rails, and infotainment analog sections from regulated 3.3 V or 5 V distribution. The wide -40C to +125C temperature range and robust protection circuits address under-hood and cabin conditions, while the low 45 uA quiescent current supports keep-alive rails where quiescent drain is limited by battery-saver specifications.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para TPS73501DRBR — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | TPS73501QDRBRQ1 | TPS73601DRBR | TPS73533DRBR |
|---|---|---|---|---|
| Package | 8-SON (DRB) 3x3 mm | 8-SON (DRB) 3x3 mm - same | 8-SON (DRB) 3x3 mm - same | 8-SON (DRB) 3x3 mm - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Output Current | 500 mA | 500 mA | 400 mA | 500 mA |
| Output Type | Adjustable 1.25 V to 6 V | Adjustable 1.25 V to 6 V | Adjustable | Fixed 3.3 V |
| Input Voltage Range | 2.7 V to 6.5 V | 2.7 V to 6.5 V | 1.7 V to 5.5 V | 2.7 V to 6.5 V |
| Quiescent Current | 45 uA | 45 uA | 1 uA (ground current, cap-free) | 45 uA |
| Automotive Grade (AEC-Q100) | No | Yes (Q1) | No | No |
Diferenciadores clave
- Ultra-low 45 uA quiescent current (frente a TPS73601DRBR)
- 68 dB PSRR for noisy upstream rails (frente a TPS73533DRBR)
- Automotive drop-in upgrade path (frente a TPS73501QDRBRQ1)
Notas de diseño
Place the 1 uF input and output ceramic capacitors as close to the IN and OUT pins as possible, with short, wide traces to the exposed thermal pad (PAD) connected to a solid ground plane. The DRB 8-SON 3x3 mm package relies on the thermal pad for both grounding and heat dissipation; without adequate via stitching (4-6 vias to the ground plane), thermal performance and load transient response degrade at 500 mA.
Set the adjustable output with a resistor divider from OUT to FB using 1% or better tolerance resistors per the TI TPS735 datasheet formula. Keep divider impedance moderate (tens of kohm) to balance accuracy against quiescent drain. Thermal dissipation: at VIN 5 V, VOUT 3.3 V, 500 mA, the device dissipates 0.85 W, which the DRB package handles only with a well-connected thermal pad - verify junction temperature against the theta_JA in the datasheet thermal table.
Do not exceed 6.5 V input. If the enable function is not used, tie EN to VIN rather than leaving it floating to prevent undefined output states. Adding a noise-reduction capacitor on the NR pin improves noise and soft-start but increases start-up time - size it according to the datasheet graph if power sequencing matters. Using fixed-output family parts (e.g., TPS73533DRBR) on the same footprint requires removing the divider resistors since the feedback function differs.
Información de cumplimiento
RoHS compliant per TI product page and distributor listings. AEC-Q100 qualified version available as TPS73501QDRBRQ1. REACH and halogen-free status not stated in provided data.
