TPS76333DBVR - 150mA, 3.3V Fixed LDO Regulator | Texas Instruments
MPN: TPS76333DBVR ✓ Hoạt độngTPS76333DBVR Tóm tắt
An LDO (Low-Dropout) linear regulator is a type of voltage regulator that maintains a stable output voltage even when the input voltage is only slightly higher than the output voltage. LDOs sit within the broader power-management IC hierarchy: LDO -> linear regulator -> voltage regulator -> power management IC -> semiconductor. Compared with switching regulators, LDOs introduce no switching ripple and require only small input/output capacitors, but they dissipate (VIN - VOUT) x IOUT as heat, which limits them to low-current and low-dropout applications.
The TPS76333 offers ±2% output accuracy across line, load, and temperature for the new chip revision, and provides a 3.3V fixed output suitable for powering MCUs, digital logic, and analog circuitry from a 5V or higher rail. Integrated current-limit and thermal-shutdown features protect the device from output shorts and overload conditions. The 5-pin SOT-23 footprint makes it appropriate for cost-sensitive, space-constrained designs.
Typical applications include portable and battery-powered equipment, microcontroller and DSP core rails, post-regulation after a switching converter to remove ripple, and 3.3V logic supply generation from a 5V bus. Designers should select input and output capacitors rated to handle the expected ripple and ensure VIN remains above VOUT + dropout at the minimum load step. The fixed-output variant eliminates external resistors, simplifying BOM and reducing board area in high-volume consumer products.
Bộ thay thế dễ dàng lắp đặt cho TPS76333DBVR — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
TPS76333DBVT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
TPS76350DBVR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
TPS76150DBVR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
NCP551SN33T1G
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MIC5225-3.3YM5-TR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
TPS76333DBVR Tỷ lệ tối đa & tính chất điện
| Kiểu đầu ra | Fixed |
| Điện áp đầu ra | 3.3 V |
| Điện áp tối đa đầu ra | 150 mA |
| Phạm vi điện áp đầu vào | 2.7 V to 10 V |
| Điện áp mất áp | 180 mV typical at 150 mA |
| Output Accuracy | ±2% (line/load/temp, new chip) |
| Quiescent Current (Active) | 85 µA typical |
| Quiescent Current (Sleep Mode) | 1 µA max at TJ=25°C |
| N Nap kích hoạt | Yes (active-high logic-enabled sleep mode) |
| Khoảng nhiệt độ hoạt động | -40 °C to +125 °C |
| Hộp | SOT-23-5 (DBV) |
| Kiểu lắp đặt | Surface Mount |
| Cấp MSL | 1 (unlimited) |
| Thermal Protection | Yes (thermal shutdown) |
| Giới hạn dòng điện | Yes (internal) |
| Trạng thái RoHS | Compliant |
| Lead-Free | Yes |
Cấu hình chân TPS76333DBVR
| Chân 1 | IN — Input voltage supply (2.7V to 10V) |
| Chân 2 | GND — Ground |
| Chân 3 | EN — Enable input (active-high, logic-enabled sleep mode) |
| Chân 4 | NC — Not connected (per datasheet) |
| Chân 5 | OUT — Regulated 3.3V output |
Ứng dụng tiêu biểu
TPS76333DBVR phù hợp cho 6 Áp dụngs: Portable Battery-Powered Devices, Microcontroller Core Rail Supply, Post-Regulation After Switching Converter, Industrial Sensor Modules, Consumer Audio and Wearable Electronics, USB-Powered Peripherals.
Portable Battery-Powered Devices
The TPS76333DBVR fits portable and battery-powered products because its 85 µA active quiescent current and 1 µA shutdown current at TJ = 25 °C minimize standby drain, extending battery life across multi-month idle periods. With a 150 mA rating and 3.3V fixed output, it powers MCUs, BLE radios, and sensor ICs directly from a single-cell Li-ion or 2xAA stack. The 2.7-10V input range accepts a fresh Li-ion (4.2V) down to end-of-life (3.0V) without regulation dropout, and the SOT-23-5 footprint saves board area in wearables and IoT nodes.
Được đề xuất
Microcontroller Core Rail Supply
The TPS76333DBVR is ideal for MCU core rails because it delivers a clean 3.3V with ±2% line/load/temp accuracy required by 3.3V digital logic, eliminating ripple from upstream switching converters. With 150 mA continuous current it comfortably supplies STM32, MSP430, and similar Cortex-M devices plus peripheral I/O. Thermal dissipation at low VIN-VOUT differential (e.g. 3.8V -> 3.3V at 50 mA = 25 mW) is negligible, so no heatsink is required even in enclosed plastic housings. The logic-enabled sleep pin lets the MCU power-gate the regulator during deep-sleep.
Được đề xuất
Post-Regulation After Switching Converter
The TPS76333DBVR works as a post-regulator to clean up switching ripple from an upstream buck or boost converter, providing a low-noise 3.3V rail for analog and RF sections. With its 72 dB-class PSRR (typical for the TPS763 family) and no switching noise of its own, it removes the residual ripple that would otherwise appear on AVDD pins of ADC/DAC or RF transceiver supplies. Designers place a TPS62841DLCR upstream and a TPS76333DBVR downstream to combine high-efficiency conversion with low-noise final regulation. The SOT-23-5 footprint stacks neatly behind the switching converter on a 2-layer PCB.
Được đề xuất
Industrial Sensor Modules
The TPS76333DBVR suits industrial 4-20 mA loop-powered sensor modules and PLC analog front-ends thanks to its -40 °C to +125 °C operating range and 10V absolute-maximum input withstand. It generates a stable 3.3V for ADC references, HART modems, and digital isolators from a 5V or 24V (post-preregulator) industrial bus. Internal current limit and thermal shutdown protect the regulator against field wiring shorts and overloads common in industrial installations. The TI TPS763 family has a long production history making it widely second-sourced for industrial longevity programs.
Được đề xuất
Consumer Audio and Wearable Electronics
The TPS76333DBVR fits consumer audio and wearable electronics because its SOT-23-5 package occupies minimal board area and its fixed 3.3V output eliminates external feedback parts. With 150 mA it powers Bluetooth audio SoCs, MEMS microphones, and small Class-D amplifier front-ends from a Li-ion cell. The 1 µA shutdown current preserves battery life when the wearable is off, and the active-high enable pin supports button-press power gating via the host MCU. Designers benefit from ±2% accuracy which keeps audio DAC reference voltages within spec across temperature.
Được đề xuất
USB-Powered Peripherals
The TPS76333DBVR works in USB-powered peripherals because its 2.7-10V input range comfortably accepts the 5V VBUS rail with margin for over-voltage events. With 150 mA continuous output it supplies MCU, status LEDs, and low-speed USB bridge chips downstream of a 5V VBUS source. The internal current limit and thermal shutdown protect against VBUS short-to-ground faults, and the enable pin can be tied to a logic-level power-good signal for sequenced startup. For bus-powered designs targeting USB-IF compliance, the TPS76333's low Iq keeps total idle draw under the USB suspend threshold.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho TPS76333DBVR — 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 | TPS76333DBVT | TPS76350DBVR | TPS76150DBVR | NCP551SN33T1G | MIC5225-3.3YM5-TR |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | onsemi | Microchip Technology |
| Package | SOT-23-5 (DBV) | SOT-23-5 (DBV) - same | SOT-23-5 (DBV) - same | SOT-23-5 (DBV) - same | SOT-23-5 (DBV) - same | SOT-23-5 (DBV) - same |
| Output Voltage | 3.3 V | 3.3 V | 5.0 V | 5.0 V | 3.3 V | 3.3 V |
| Maximum Output Current | 150 mA | 150 mA | 150 mA | 100 mA | 150 mA | 150 mA |
| Input Voltage Range | 2.7 V to 10 V | 2.7 V to 10 V | 2.7 V to 10 V | 2.7 V to 10 V | 2.5 V to 12 V | 2.3 V to 16 V |
| Enable Pin | Yes (active-high) | Yes (active-high) | Yes (active-high) | Yes (active-high) | Yes | Yes |
| Thermal Shutdown | Yes | Yes | Yes | Yes | Yes | Yes |
Bảo phân biệt quan trọng
- Logic-enabled sleep mode with 1 µA shutdown current (vsTPS76150DBVR)
- 150 mA output current vs 100 mA (vsTPS76150DBVR)
- Wide cross-brand second-source availability (vsNCP551SN33T1G)
Ghi chú thiết kế
Estimated: At VIN=5V, VOUT=3.3V, IOUT=150 mA, power dissipation is (5 - 3.3) * 0.150 = 255 mW. With SOT-23-5 theta_JA typically around 220-260 C/W on a 1 oz 2-layer board, junction temperature rise is approximately 55-65 C above ambient, well inside the 125 C operating limit. Designers running near 10V VIN at full 150 mA (Pdiss ~ 1 W) must use a copper pour under the exposed pad area to keep Tj below 125 C.
Place the input capacitor (1 µF minimum, ceramic X7R) within 5 mm of the IN pin and the output capacitor (1 µF minimum, ceramic X7R) within 5 mm of the OUT pin. The TPS76333 is stable with low-ESR ceramic output capacitors; do not substitute tantalum or aluminum without checking ESR stability region in the TI datasheet. Keep high-current load traces away from the feedback path to avoid noise coupling.
Do not exceed the absolute maximum input voltage of 10V - transients above this rating can permanently damage the device. The EN pin is logic-level and must not be left floating; tie it to IN through a 100 kΩ resistor if not actively driven. Output accuracy degrades if the output capacitor falls below 1 µF effective capacitance, so avoid Y5V dielectrics which lose capacitance with DC bias. For applications requiring AEC-Q100, choose an automotive-graded part rather than the standard TPS76333.
The TPS76333's 1 µA maximum shutdown current (at TJ = 25 °C) makes it ideal for always-on battery designs. To minimize quiescent current, drive EN low during long idle periods; the regulator output collapses and Iq drops to the µA range. For multi-rail systems, sequence the TPS76333's EN after any upstream converter power-good signal to prevent back-feeding through the output pin during startup.
Thông tin tuân thủ
RoHS compliant per TI TPS763 product page. Not AEC-Q100 qualified - select an automotive-graded LDO for vehicle applications. Lead-free terminations confirmed.