TPS7A2633DRVR - 500mA 3.3V Ultra-Low-IQ LDO | Texas Instruments
MPN: TPS7A2633DRVR ✓ Hoạt độngTPS7A2633DRVR Tóm tắt
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.
Bộ thay thế dễ dàng lắp đặt cho TPS7A2633DRVR — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
TPS7A2633DRVT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
TPS7A2625DRVR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
TPS7A2650DRVR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
TPS7A2601DRVR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
TPS7A2633DRVR Tỷ lệ tối đa & tính chất điện
| Kiểu đầu ra | Fixed |
| Điện áp đầu ra | 3.3 V |
| Output Current | 500 mA |
| Phạm vi điện áp đầu vào | 2.4 V to 18 V |
| Điện áp mất áp | 590 mV max at 500 mA |
| Quiescent Current (Iq) | 2.0 µA typical |
| Output Accuracy | ±1% over temperature |
| Khoảng nhiệt độ hoạt động | -40°C to +125°C |
| Power Good (PGOOD) | Open-drain output |
| Hộp | WSON-6 (DRV) 2x2 mm |
| Kiểu lắp đặt | Surface Mount |
| Số chân | 6 |
| Trạng thái RoHS | Compliant |
| Tắt nhiệt | Yes (internal) |
| Giới hạn dòng điện | Yes (internal) |
Cấu hình chân TPS7A2633DRVR
| Chân 1 | EN — Enable input (active-high; pull high to enable output) |
| Chân 2 | VIN — Input supply voltage (2.4 V to 18 V) |
| Chân 3 | GND — Ground reference |
| Chân 4 | PGOOD — Open-drain power-good indicator (low when VOUT is out of regulation) |
| Chân 5 | NR/SS — Noise-reduction / soft-start capacitor node |
| Chân 6 | VOUT — Regulated 3.3 V output (decouple with ≥1 µF X7R ceramic) |
Ứng dụng tiêu biểu
TPS7A2633DRVR phù hợp cho 6 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho TPS7A2633DRVR — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | 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 |
Bảo phân biệt quan trọng
- Ultra-low 2.0 µA quiescent current (vsTPS7A1125PDRVR (TPS7A11 family))
- Wide 18 V input voltage range (vsTLV1117LV33DCYR)
- Integrated open-drain power-good output (vsMany 6-pin LDOs without PGOOD)
Ghi chú thiết kế
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.
Thông tin tuân thủ
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.
