TPS73501DRBR - 500mA Low-IQ High-PSRR LDO | Texas Instruments
MPN: TPS73501DRBR β Active| Qty | Unit Price | Extended |
|---|---|---|
| 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 |
Drop-in alternatives for TPS73501DRBR β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
TPS73501QDRBRQ1
β Drop-Inβ In Stock
$1.12 / Unit
View Datasheet βTPS73601DRBR
β Drop-Inπ Reference alternative (not in catalog)
TPS73533DRBR
β‘ Same Packageπ Reference alternative (not in catalog)
TPS73525DRBRG4
β‘ Same Packageπ Reference alternative (not in catalog)
TPS73633DRBRG4
β‘ Same Packageπ Reference alternative (not in catalog)
TPS73501DRBR Maximum Ratings & Electrical Characteristics
| Output Type | Adjustable |
| Output Voltage Range | 1.25 V to 6 V |
| Maximum Output Current | 500 mA |
| Input Voltage Range | 2.7 V to 6.5 V |
| Quiescent Current | 45 uA |
| PSRR | 68 dB at 1 kHz |
| Dropout Voltage | 0.5 V at 500 mA |
| Enable Pin | Yes |
| Protection Features | Overcurrent, Thermal Shutdown |
| Operating Temperature | -40C to +125C |
| Package | 8-SON (DRB) 3x3 mm |
| Mounting Type | Surface Mount |
| Process Technology | CMOS |
| Output Noise | 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 |
TPS73501DRBR Pin Configuration
| Pin 1 | EN β Enable input, active high; tie to VIN if unused |
| Pin 2 | NR β Noise reduction / soft-start bypass capacitor pin |
| Pin 3 | GND β Ground |
| Pin 4 | FB/ADJ β Feedback pin for adjustable output, connect to resistor divider |
| Pin 5 | OUT β Regulated output voltage |
| Pin 6 | OUT β Regulated output voltage (connected) |
| Pin 7 | IN β Input supply, 2.7 V to 6.5 V |
| Pin 8 | IN β Input supply (connected) |
| Pin PAD | Thermal Pad β Exposed pad, connect to GND for heat dissipation |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
TPS73501DRBR is suitable for 6 applications: 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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
Recommended Products Summary
Engineering reference data for TPS73501DRBR β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | 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 |
| PSRR at 1 kHz | 68 dB | 68 dB | [DATA_NEEDED] | 68 dB |
| Automotive Grade (AEC-Q100) | No | Yes (Q1) | No | No |
Key Differentiators
- Ultra-low 45 uA quiescent current (vs TPS73601DRBR)
- 68 dB PSRR for noisy upstream rails (vs TPS73533DRBR)
- Automotive drop-in upgrade path (vs TPS73501QDRBRQ1)
Design Notes
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.
Compliance Information
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.
