TPS73501QDRBRQ1 - 500mA Low-Noise LDO, AEC-Q100 | TI
MPN: TPS73501QDRBRQ1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.1 | $2.10 |
| 10 | $1.89 | $18.90 |
| 100 | $1.55 | $155.00 |
| 500 | $1.32 | $660.00 |
| 1,000 | $1.12 | $1,120.00 |
TPS73501QDRBRQ1 Overview
An LDO (low-dropout regulator) is a type of linear voltage regulator that maintains a regulated output even when the input voltage is only slightly above the output. Within the power management IC hierarchy, LDOs sit downstream of switching converters to provide clean, low-noise rails for noise-sensitive loads. Unlike DC-DC buck converters, an LDO adds no switching ripple, trading efficiency for output purity.
Key features of the TPS735-Q1 family include 500-mA output current capability, very low dropout voltage for high-efficiency operation, low quiescent current that extends battery and standby life, and high PSRR that suppresses upstream switching-converter ripple. The enable pin (active functionality confirmed by TI product page) supports rail sequencing in multi-supply systems. The VSON-8 (DRB) package with exposed pad provides good thermal performance for a compact footprint.
The device uses a low-noise architecture with a precision reference; for lowest output noise, an optional noise-bypass/noise-reduction capacitor at the NR pin reduces reference noise bandwidth (refer to TI datasheet). Internal protection includes current limit and thermal shutdown.
Typical applications include automotive ADAS camera and radar module power rails, infotainment audio/RF supplies, cluster displays, and post-regulation of 3.3V or 5V switching rails in industrial systems requiring low-noise analog rails.
Design tip: with a 5V input and 3.3V output at 500 mA, the device dissipates about 0.85W; verify junction temperature using the DRB package theta_JA with adequate PCB copper on the exposed thermal pad, per TI layout guidelines.
Drop-in alternatives for TPS73501QDRBRQ1 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with TPS73501QDRBRQ1 (same form factor and footprint) — differing in Output Type, Package, Maximum Output Current, Automotive Qualification.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
TPS73501DRBR
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$0.68 / Unit
View Datasheet →TPS73533QDRBRQ1
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
TPS74801QDRCRQ1
✅ Drop-In✓ In Stock
$1 / Unit
View Datasheet →TPS73501QDRBRQ1 Maximum Ratings & Electrical Characteristics
| Output Type | Positive Adjustable (1 output) |
| Output Voltage Range | 1.25 V to 6 V |
| Maximum Output Current | 500 mA |
| Topology | LDO (Low-Dropout Linear Regulator) |
| Enable Pin | Yes |
| Operating Temperature | -40C to +125C |
| Package | 8-SON / VSON (DRB), 3x3 mm |
| Mounting Type | Surface Mount |
| Automotive Qualification | AEC-Q100 Qualified |
| RoHS Status | Compliant |
TPS73501QDRBRQ1 Pin Configuration
| Pin 1 | IN — Input supply voltage |
| Pin 2 | GND — Ground |
| Pin 3 | EN — Enable input (active high) |
| Pin 4 | NR/SS — Noise reduction / soft-start capacitor |
| Pin 5 | FB — Feedback for adjustable output |
| Pin 6 | OUT — Regulated output voltage |
| Pin 7 | NC — [DATA_NEEDED: pin function] |
| Pin 8 | NC — [DATA_NEEDED: pin function] |
| Pin Pad | Thermal Pad — Exposed pad - solder to ground pour for thermal dissipation |
Typical Applications
TPS73501QDRBRQ1 is suitable for 6 applications: Automotive ADAS Camera Module Power, Automotive Radar Module Supply, Infotainment Audio Power, Cluster and Display Rails, Body Electronics and Gateway Modules, Industrial Precision Analog Post-Regulation.
Automotive ADAS Camera Module Power
Image sensor and SERDES analog rails in automotive cameras demand ultra-clean supplies; switching regulator ripple directly raises sensor read-noise. The TPS73501QDRBRQ1, with AEC-Q100 qualification, low output noise, and high PSRR, post-regulates a 3.3V or 5V buck output down to sensor AVDD rails at up to 500 mA. Placing the LDO after the switcher removes mV-level ripple while the enable pin supports the camera module power-up sequence required by ASIL-style designs.
Recommended
Automotive Radar Module Supply
Radar transceiver (mmWave) supplies are exquisitely noise-sensitive: phase noise on the PA/LO rails degrades detection performance. The TPS73501QDRBRQ1 provides an adjustable 1.25V-6V, 500-mA rail with high PSRR that suppresses upstream DC-DC ripple before it reaches RF blocks. Its -40C to +125C AEC-Q100 rating covers harsh engine-bay-adjacent mounting, and the VSON-8 DRB exposed pad allows compact thermal management within dense radar PCB real estate.
Recommended
Infotainment Audio Power
Audio amplifiers and codecs require supply noise far below the audible floor; power-supply ripple appears directly as output hum and hiss. The TPS73501QDRBRQ1's low-noise, high-PSRR profile makes it well suited to powering audio codecs and preamp stages at up to 500 mA from a 5V rail, with the NR pin configuration per datasheet reducing reference noise. AEC-Q100 qualification satisfies infotainment environmental requirements without a second qualification effort.
Recommended
Cluster and Display Rails
Automotive instrument clusters and displays combine switching regulators for backlight LED current with sensitive display driver and serializer supplies. The TPS73501QDRBRQ1 post-regulates at 500 mA for display timing-controller and serializer analog rails, where high PSRR keeps backlight switching artifacts out of the LVDS/ SerDes signal path. Its enable pin enables sequencing of display rails during ignition power-up, and the -40C to +125C range handles cabin and dashboard thermal extremes.
Recommended
Body Electronics and Gateway Modules
Body control modules and gateways host CAN/LIN transceivers and low-power MCUs whose analog rails benefit from low quiescent current and clean regulation under always-on standby conditions. The TPS73501QDRBRQ1's low-IQ design minimizes key-off battery drain while supplying up to 500 mA during active modes. TCAN-family transceivers and MSPM0 MCUs can be fed from this LDO, and its AEC-Q100 status aligns with automotive body electronics qualification requirements.
Recommended
Industrial Precision Analog Post-Regulation
In test and measurement and factory automation systems, precision ADCs and amplifiers need low-noise rails despite noisy 24V-derived intermediate buses. Although the TPS73501QDRBRQ1 targets automotive, its 500-mA, high-PSRR adjustable output works in industrial post-regulation after a 5V or 6V intermediate rail. Designers should confirm headroom: keeping VIN-VOUT modest limits dissipation while the DRB exposed pad, soldered to a copper pour, handles the remaining thermal load.
Recommended
Recommended Products Summary
Engineering reference data for TPS73501QDRBRQ1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TPS73501DRBR | TPS74801QDRCRQ1 | NCP703 |
|---|---|---|---|---|
| Package | VSON-8 (DRB) 3x3 mm | VSON-8 (DRB) 3x3 mm - same | VSON-8 (DRB) 3x3 mm - same | SOIC-8 - different package |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | onsemi |
| Low-Noise / High-PSRR Positioning | Yes | Yes | Yes (low-IQ family) | Low noise |
Key Differentiators
- Automotive AEC-Q100 qualification in compact VSON-8 (vs TPS73501DRBR)
- Low quiescent current with 500-mA capability (vs TPS74801QDRCRQ1)
- Adjustable output flexibility (vs TPS73533QDRBRQ1)
Design Notes
With 5V input, 3.3V output at full 500-mA load, the TPS73501QDRBRQ1 dissipates approximately 0.85W. The VSON-8 (DRB) package relies on its exposed pad for heat removal; theta_JA depends heavily on PCB copper area. Follow the TI datasheet layout guideline of a solid ground pour with multiple thermal vias under the pad. If dissipation exceeds about 1W, consider a two-stage regulation (buck plus LDO) to split the thermal load.
Place the input capacitor (1uF-10uF ceramic per datasheet recommendation) within a few millimeters of the IN pin, and the output capacitor close to OUT. The exposed thermal pad is the primary ground connection - do not treat it as optional; use a 4x4 via array to the ground plane. Keep the FB resistor divider traces short and away from switching nodes to prevent noise injection into the regulation loop.
Do not leave the NR/SS pin floating if lowest output noise is required - the noise-reduction capacitor reduces reference noise bandwidth per the TPS735-Q1 datasheet typical applications. Ensure the enable pin is not left floating in noise-sensitive systems; tie it through a divider to the input rail if sequencing is not needed. Verify output voltage accuracy using 1% tolerance resistors on the FB divider.
Compliance Information
AEC-Q100 automotive qualification confirmed by TI product page (TPS735-Q1). RoHS/lead-free status typical for TI active parts but explicit certificates not present in provided data.
