TPS7A2633DRVR - 500mA 3.3V Ultra-Low-IQ LDO | Texas Instruments
N.º da peça: TPS7A2633DRVR ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $1.42 | $1,42 |
| 10 | $1.18 | $11,80 |
| 100 | $0.96 | $96,00 |
| 500 | $0.78 | $390,00 |
| 1.000 | $0.65 | $650,00 |
TPS7A2633DRVR Visão geral
What is an LDO? An LDO (Low-Dropout) linear regulator is a DC linear voltage regulator that can maintain a regulated output voltage even when the input voltage approaches the output voltage (i.e., with very low VIN-VOUT headroom or "dropout"). In the power management IC hierarchy, LDOs sit beneath switching converters as a clean, low-noise post-regulation or auxiliary-rail building block. Unlike buck or boost switching converters, an LDO dissipates excess energy as heat and adds no switching ripple, which is why ultra-low-IQ LDOs such as the TPS7A26 family are preferred for biasing MCUs, sensors, and always-on rails where both noise and standby battery drain matter.
The TPS7A26 platform integrates key differentiating features: 2.0 µA typical IQ for extended battery life, ±1% output accuracy across -40°C to +125°C, an open-drain PGOOD output for rails-ready sequencing and supervision, internal current limit, and thermal shutdown. Adjustable output versions (1.24 V to 17.4 V) are also available in the same DRV package, allowing PCB reuse across different rails in a platform.
Architecturally, the TPS7A26 uses a PNP pass element topology with a precision bandgap reference and trimmed feedback network. The wide 18 V input range allows direct regulation from 12 V industrial buses, USB (5 V), or 2-cell lithium packs, while the 2.0 µA IQ keeps standby losses under 10 µW at 3.3 V, which is critical for IoT nodes that must run for years on a primary cell.
Typical applications include low-power MCU rails (MSP430, STM32 in stop mode), wireless sensor nodes (Zigbee, BLE, LoRa), industrial 12 V to 3.3 V point-of-load regulation, e-metering and home-automation subsystems, battery-backed RTC and memory retention rails, and as a post-filter following a noisy DC/DC pre-regulator.
When designing with this LDO, derate VIN - VOUT carefully: at 18 V input and 3.3 V output at full 500 mA load, the device dissipates roughly 7.35 W and requires a substantial copper pour to keep the junction within the 125°C limit. Decouple both input and output with at least 1 µF X7R/X5R ceramic close to the pins, and leave PGOOD floating or pulled up if monitoring is not required.
This page synthesizes authorized distributor pricing, parametric drop-in alternatives from the same TPS7A26 family, and practical PCB/thermal design notes that go beyond the manufacturer datasheet's typical-application curves.
Alternativas drop-in para TPS7A2633DRVR — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
TPS7A2633DRVT
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
TPS7A2625DRVR
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
TPS7A2650DRVR
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
TPS7A2601DRVR
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
TPS7A2633DRVR Classificações máximas e características elétricas
| Tipo de saída | Fixed |
| Tensão de saída | 3.3 V |
| Output Current | 500 mA |
| Faixa de tensão de entrada | 2.4 V to 18 V |
| Tensão de dropout | 590 mV max at 500 mA |
| Quiescent Current (Iq) | 2.0 µA typical |
| Output Accuracy | ±1% over temperature |
| Faixa de temperatura de operação | -40°C to +125°C |
| Power Good (PGOOD) | Open-drain output |
| Encapsulamento | WSON-6 (DRV) 2x2 mm |
| Tipo de montagem | Surface Mount |
| Contagem de pinos | 6 |
| Status RoHS | Compliant |
| Desligamento térmico | Yes (internal) |
| Limitação de corrente | Yes (internal) |
Configuração de pinos do TPS7A2633DRVR
| Pino 1 | EN — Enable input (active-high; pull high to enable output) |
| Pino 2 | VIN — Input supply voltage (2.4 V to 18 V) |
| Pino 3 | GND — Ground reference |
| Pino 4 | PGOOD — Open-drain power-good indicator (low when VOUT is out of regulation) |
| Pino 5 | NR/SS — Noise-reduction / soft-start capacitor node |
| Pino 6 | VOUT — Regulated 3.3 V output (decouple with ≥1 µF X7R ceramic) |
Aplicações típicas
TPS7A2633DRVR é adequado para 6 aplicaçãos: Always-On IoT MCU Rail (1.8 V-3.3 V), Wireless Sensor Node Power (Zigbee/BLE/LoRa), Industrial 12 V / 24 V Point-of-Load, Battery-Backed RTC and Memory Retention, Post-Filter LDO After a Switching Pre-Regulator, E-Metering and Home Automation Subsystems.
Always-On IoT MCU Rail (1.8 V-3.3 V)
The TPS7A2633DRVR is a natural fit for always-on microcontroller rails in IoT endpoints: its fixed 3.3 V output directly biases STM32, MSP430, or CC26xx families, while the 2.0 µA quiescent current keeps standby drain on a coin cell negligible. Placing the LDO between the battery and the MCU VDD pin (with 1 µF X5R input/output ceramics) extends service life by 20-40% versus LDOs that draw 10-50 µA Iq. The 18 V input also tolerates direct connection to a USB or 2-cell Li-Ion pack.
Recomendado
Wireless Sensor Node Power (Zigbee/BLE/LoRa)
For battery-powered wireless sensor nodes, the TPS7A2633DRVR's 2.0 µA IQ and ±1% accuracy provide a clean 3.3 V rail for sub-GHz transceivers and BLE SoCs without draining the cell. In a typical 2xAA or coin-cell design, the LDO sits directly after a boost or buck pre-regulator; its low dropout (590 mV max) lets the node keep transmitting down to 3.9 V battery voltage. PGOOD can wake the host MCU when the rail is stable, simplifying firmware power sequencing.
Recomendado
Industrial 12 V / 24 V Point-of-Load
Factory automation and process-control boards often require a local 3.3 V rail derived from a noisy 12 V or 24 V industrial bus; the TPS7A2633DRVR handles up to 18 V input transients without external protection. Its ±1% accuracy and 500 mA capability comfortably power a small PLC sub-system, an HMI display controller, or a sensor interface ASIC. Place it after a bulk TVS-protected bulk capacitor; the part's 1.5 mm x 1.5 mm thermal pad allows direct soldering to a copper pour for heat extraction.
Recomendado
Battery-Backed RTC and Memory Retention
In systems where a coin cell retains RTC and SRAM contents during main-power loss, the TPS7A2633DRVR's 2.0 µA Iq keeps retention-mode draw to under 10 µW. Compared with legacy 100 µA Iq LDOs, this extends the shelf life of field-replaceable batteries by years. Use it to bias the VBAT domain of a real-time clock or external non-volatile memory while the main supply is off; the PGOOD pin can signal the host that retention power is valid.
Recomendado
Post-Filter LDO After a Switching Pre-Regulator
When a downstream rail must be free of switching ripple (audio codecs, precision ADCs, RF VCOs), place the TPS7A2633DRVR after a switching DC/DC to filter residual ripple below 1 mVpk-pk. The 60+ dB PSRR at 100 kHz attenuates the typical buck-converter fundamental, while the fixed 3.3 V output eliminates resistor-divider errors. The 2.0 µA Iq is also acceptable in this role since the switching pre-regulator dominates efficiency, and PGOOD can validate rail integrity to the system supervisor.
Recomendado
E-Metering and Home Automation Subsystems
Smart electricity meters and home-automation gateways need a robust 3.3 V rail from a 12-15 V auxiliary supply; the TPS7A2633DRVR's 18 V absolute-maximum VIN tolerates large transient events on the bus. Its 2.0 µA Iq keeps standby consumption low for EN 50491-4-1 smart-metering compliance, while ±1% accuracy ensures the metrology IC and MCU communicate reliably. The 6-pin DRV package is small enough to fit on densely populated meter PCBs alongside the metrology front end.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para TPS7A2633DRVR — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | TPS7A2633DRVT | TPS7A2625DRVR | TPS7A2650DRVR | TPS7A2601DRVR |
|---|---|---|---|---|---|
| Package | WSON-6 (DRV) 2x2 mm | WSON-6 (DRV) 2x2 mm - same | WSON-6 (DRV) 2x2 mm - same | WSON-6 (DRV) 2x2 mm - same | WSON-6 (DRV) 2x2 mm - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Output Voltage | 3.3 V fixed | 3.3 V fixed | 2.5 V fixed | 5.0 V fixed | Adjustable 1.24 V-17.4 V |
| Output Current | 500 mA | 500 mA | 500 mA | 500 mA | 500 mA |
| Input Voltage Range | 2.4 V to 18 V | 2.4 V to 18 V | 2.4 V to 18 V | 2.4 V to 18 V | 2.4 V to 18 V |
| Quiescent Current | 2.0 µA typ | 2.0 µA typ | 2.0 µA typ | 2.0 µA typ | 2.0 µA typ |
| Dropout Voltage (max @ 500 mA) | 590 mV | 590 mV | 590 mV | 590 mV | 590 mV |
| Power Good Output | Yes (open-drain) | Yes | Yes | Yes | Yes |
| Operating Temperature | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C |
Principais diferenciais
- Ultra-low 2.0 µA quiescent current (vs TPS7A1125PDRVR (TPS7A11 family))
- Wide 18 V input voltage range (vs TLV1117LV33DCYR)
- Integrated open-drain power-good output (vs Many 6-pin LDOs without PGOOD)
Notas de projeto
Estimated: at VIN = 18 V, VOUT = 3.3 V, IOUT = 500 mA, the device dissipates (18 - 3.3) * 0.5 = 7.35 W. With the 2x2 mm WSON package, θJA is on the order of 60-80 °C/W on a standard JEDEC 2s2p test board; this means junction temperature can rise 440-590 °C above ambient, far exceeding the 125 °C limit. To stay within the thermal envelope, either reduce VIN (use a 5 V or 12 V rail rather than 18 V at full load) or attach the exposed thermal pad to at least 1 cm² of 2 oz copper pour, and verify with a thermal probe in the final layout.
Place a 1 µF X7R or X5R ceramic input capacitor within 2 mm of the VIN pin and a 1 µF (or larger) X7R output capacitor within 2 mm of the VOUT pin. For applications where VIN rises fast (e.g., hot-plug from a 12 V bus) add a 1 Ω series resistor or soft-start capacitor on NR/SS to limit inrush current. The exposed thermal pad must be soldered to the ground pour for both thermal and electrical performance; do not leave it floating or use thermal vias only without a topside connection.
Do not exceed 18 V on VIN even momentarily - the absolute-maximum rating is 18 V per the TI TPS7A26 datasheet, and transients above 20 V can permanently damage the device. The PGOOD output is open-drain and requires a pull-up resistor (typically 10 kΩ to 100 kΩ) to VOUT or to a logic rail; do not connect it directly to a voltage source. Finally, ensure the EN pin is not left floating - either tie it directly to VIN through a 100 kΩ resistor for always-on operation or drive it with the host MCU; a floating EN pin can cause unpredictable power-up behavior.
Informações de conformidade
RoHS and REACH compliant per Texas Instruments product page; lead-free finish. Not AEC-Q100 qualified - this is a fixed-output industrial/consumer part. Halogen-free status not explicitly stated in the provided data; the Automotive-grade TPS7A26-Q1 variant would be required for AEC-Q100 applications.
