TPS73501DRBR - 500mA Low-IQ High-PSRR LDO | Texas Instruments
MPN: TPS73501DRBR ✓ Hoạt độngTPS73501DRBR 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 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.
Bộ thay thế dễ dàng lắp đặt cho TPS73501DRBR — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với TPS73501DRBR (cùng hình factor và footprint) — khác nhau ở Output Type, Package.
TPS73501QDRBRQ1
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →TPS73601DRBR
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
TPS73533DRBR
⚡ Đồng gói ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
TPS73525DRBRG4
⚡ Đồng gói📋 Tham chiếu thay thế (không có trong danh mục)
TPS73633DRBRG4
⚡ Đồng gói📋 Tham chiếu thay thế (không có trong danh mục)
TPS73501DRBR Tỷ lệ tối đa & tính chất điện
| Kiểu đầu ra | Adjustable |
| Khoảng điện áp đầu ra | 1.25 V to 6 V |
| Điện áp tối đa đầu ra | 500 mA |
| Phạm vi điện áp đầu vào | 2.7 V to 6.5 V |
| Điện áp yên tĩnh | 45 uA |
| PSRR | 68 dB at 1 kHz |
| Điện áp mất áp | 0.5 V at 500 mA |
| N Nap kích hoạt | Yes |
| Protection Features | Overcurrent, Thermal Shutdown |
| Nhiệt độ hoạt động | -40C to +125C |
| Hộp | 8-SON (DRB) 3x3 mm |
| Kiểu lắp đặt | Surface Mount |
| Process Technology | CMOS |
| Tiếng ồn đầu ra | 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 |
Cấu hình chân TPS73501DRBR
| Chân 1 | EN — Enable input, active high; tie to VIN if unused |
| Chân 2 | NR — Noise reduction / soft-start bypass capacitor pin |
| Chân 3 | GND — Ground |
| Chân 4 | FB/ADJ — Feedback pin for adjustable output, connect to resistor divider |
| Chân 5 | OUT — Regulated output voltage |
| Chân 6 | OUT — Regulated output voltage (connected) |
| Chân 7 | IN — Input supply, 2.7 V to 6.5 V |
| Chân 8 | IN — Input supply (connected) |
| Chân PAD | Thermal Pad — Exposed pad, connect to GND for heat dissipation |
Ứng dụng tiêu biểu
TPS73501DRBR phù hợp cho 6 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho TPS73501DRBR — 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 | 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 |
Bảo phân biệt quan trọng
- Ultra-low 45 uA quiescent current (vsTPS73601DRBR)
- 68 dB PSRR for noisy upstream rails (vsTPS73533DRBR)
- Automotive drop-in upgrade path (vsTPS73501QDRBRQ1)
Ghi chú thiết kế
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.
Thông tin tuân thủ
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.
