TPS62172QDSGRQ1 - 3-17V 0.5A AEC-Q100 Buck Converter | TI
MPN: TPS62172QDSGRQ1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.78 | $2.78 |
| 10 | $2.45 | $24.50 |
| 100 | $2.12 | $212.00 |
| 500 | $1.84 | $920.00 |
| 1,000 | $1.55 | $1,550.00 |
| 3,000 | $1.32 | $3,960.00 |
TPS62172QDSGRQ1 Overview
A buck (step-down) DC-DC converter is a switched-mode power supply that converts a higher DC input voltage to a lower DC output voltage by alternately storing energy in an inductor and releasing it to the load through a filter capacitor. Compared with linear regulators, bucks achieve much higher efficiency at large input-to-output voltage differentials because they do not dissipate the VIN-VOUT drop as heat. Bucks sit within the broader power-management hierarchy: DC-DC converter -> switched-mode power supply -> power management IC -> semiconductor. The TPS6217x-Q1 family specifically targets high power-density automotive subsystems where small inductors, low quiescent current, and predictable EMI behaviour are essential.
Key specifications include a typical 2.25 MHz switching frequency (allowing 1.0 uH to 2.2 uH chip inductors), 17 uA quiescent current, 2% output voltage accuracy, and a power-good output that signals when VOUT has reached regulation. The DCS-Control topology provides a smooth transition from PWM to light-load power-save mode, preserving efficiency at microampere loads. Internal soft-start limits inrush current, and the device supports 100% duty-cycle operation for low-dropout behaviour near 3 V input.
The internal architecture uses adaptive on-time control with a virtual current sense, eliminating the need for an external current-sense resistor and minimising PCB area. The exposed thermal pad (EP) on the WSON-8 package provides a low thermal resistance path to the PCB ground plane, allowing the 500 mA continuous load at up to 17 V VIN without external heatsinking for typical automotive ambient temperatures. The 2.25 MHz switching frequency falls above the AM band and well above CISPR 25 automotive EMI bands, simplifying compliance.
Typical applications include automotive infotainment head units, ADAS sensor modules (camera, radar), body-electronics clusters, always-on telematics units, and industrial 12 V point-of-load rails that must survive load-dump transients. The wide 3 V to 17 V VIN range tolerates cranking dips and 12 V battery transients directly.
When designing with the TPS62172QDSGRQ1, choose a 1.0 uH to 2.2 uH shielded inductor rated for at least 0.7 A saturation, place input capacitors as close to the VIN and GND pads as possible, and connect the EP to a ground-copper pour of at least 100 mm squared for proper thermal relief.
This page synthesizes manufacturer datasheet parameters, distributor pricing tiers, drop-in compatible same-package alternatives, and design notes not consolidated on the manufacturer product page - useful for engineers evaluating AEC-Q100 0.5 A rails and validating pin-to-pin second-source options.
Drop-in alternatives for TPS62172QDSGRQ1 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
TPS62173QDSGRQ1
✅ Drop-In📋 Reference alternative (not in catalog)
TPS62170QDSGRQ1
✅ Drop-In📋 Reference alternative (not in catalog)
TPS62160QDSGRQ1
✅ Drop-In📋 Reference alternative (not in catalog)
TPS62175QDSGRQ1
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
TPS62177QDSGRQ1
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
TPS62172QDSGRQ1 Maximum Ratings & Electrical Characteristics
| Topology | Synchronous Buck (Step-Down) |
| Input Voltage Range | 3 V to 17 V |
| Output Voltage | 3.3 V (fixed) |
| Output Current (Continuous) | 500 mA |
| Switching Frequency (Typical) | 2.25 MHz |
| Quiescent Current (Typical) | 17 uA |
| Control Topology | DCS-Control (hysteretic + PWM) |
| Output Voltage Accuracy | 2% (approx., per datasheet) |
| Duty-Cycle Operation | Up to 100% (low-dropout) |
| Soft-Start | Internal |
| Power Good Output | Yes (open-drain) |
| Operating Temperature Range | -40C to +125C |
| Package | 8-WSON EP (DSG), 2 mm x 2 mm |
| Mounting Type | Surface Mount |
| AEC-Q100 Qualification | Qualified |
| RoHS Status | Compliant |
TPS62172QDSGRQ1 Pin Configuration
| Pin 1 | PGND — Power ground return for the synchronous rectifier |
| Pin 2 | VIN — Supply voltage input (3 V to 17 V) |
| Pin 3 | EN — Enable input (active high); drive high to enable the converter |
| Pin 4 | AGND — Analog ground for internal reference and feedback |
| Pin 5 | FB — Feedback node (fixed VOUT internal divider; tie to VOUT on fixed versions) |
| Pin 6 | VOUT — Regulated output voltage sense (3.3 V on TPS62172) |
| Pin 7 | SW — Switch node to external inductor |
| Pin 8 | PG — Power-good open-drain output (asserts when VOUT is in regulation) |
| Pin EP | EP — Exposed thermal pad - solder to ground copper pour for thermal relief |
Typical Applications
TPS62172QDSGRQ1 is suitable for 6 applications: Automotive Infotainment Head Unit Power Rail, ADAS Camera Sensor Module Power, Body Electronics Cluster and BCM Supply, Automotive Telematics and eCall Unit, Industrial 12 V Point-of-Load Regulation, Battery-Powered Portable Equipment with 12 V Adapter Input.
Automotive Infotainment Head Unit Power Rail
The TPS62172QDSGRQ1 provides the regulated 3.3 V supply that powers display controllers, Ethernet PHYs, and audio CODECs inside an automotive infotainment head unit. Its 3 V to 17 V input range tolerates cranking dips down to 6 V (cold start) and load-dump surges up to the 17 V absolute maximum, and the 2.25 MHz switching frequency sits above the AM broadcast band so conducted emissions through the wiring harness remain CISPR 25 compliant without large ferrite beads. By integrating both MOSFETs in a 2 mm x 2 mm package, the converter takes about one quarter the board area of a discrete buck plus external FETs, freeing space for higher-density audio processing.
Recommended
ADAS Camera Sensor Module Power
Forward-facing ADAS camera modules require a low-noise, deterministic 3.3 V rail for the image sensor, serializer, and microcontroller. The TPS62172QDSGRQ1 supplies this rail from the vehicle 12 V bus, and its fixed-frequency DCS-Control topology prevents switching-frequency jitter that could couple into the image-sensor analog front end through ground bounce or supply modulation. The 17 uA quiescent current supports the increasingly common requirement for permanent parasitic load below 100 uA even when the camera is in standby. Thermal performance is critical because camera enclosures are sealed; the 8-WSON exposed pad provides low thermal impedance to the module's inner ground plane.
Recommended
Body Electronics Cluster and BCM Supply
Body control modules distribute 12 V power to dozens of loads and require stable sub-rails for microcontrollers, LIN/CAN transceivers, and relay drivers. The TPS62172QDSGRQ1 generates the 3.3 V rail for the BCM microcontroller and wireless receiver, with its 500 mA capacity sufficient for the BCM MCU plus a sub-gigahertz radio burst current. The AEC-Q100 grade 1 qualification (-40 C to +125 C) ensures operation in the under-hood thermal envelope, and the integrated synchronous rectifiers reduce BOM cost versus a controller + external FET arrangement.
Recommended
Automotive Telematics and eCall Unit
Telematics control units (TCUs) for eCall and connected-car services must maintain cellular modem power during crash events when the battery may sag below 6 V. The TPS62172QDSGRQ1's 3 V minimum input sustains the 3.3 V rail down to a deep-discharge battery, allowing the modem to transmit the eCall SOS packet during the post-crash window. The 2.25 MHz switching frequency enables small ceramic-only input and output capacitors that survive the automotive vibration profile better than electrolytic capacitors.
Recommended
Industrial 12 V Point-of-Load Regulation
In factory-automation PLCs and industrial sensor hubs, 24 V (or 12 V) bus rails feed individual sub-circuits that require isolated, low-noise 3.3 V supplies. The TPS62172QDSGRQ1's wide 3 V to 17 V input range easily covers 12 V nominal industrial buses including their +/-10% tolerance band and short transient excursions. Synchronous rectification holds efficiency above 90% at 500 mA loads, eliminating heatsinking in the sealed enclosure. The exposed-pad WSON-8 footprint matches industrial PCB assembly guidelines for surface-mount automotive-derived parts.
Recommended
Battery-Powered Portable Equipment with 12 V Adapter Input
Portable hand-held diagnostic tools operate from a 12 V wall adapter or 4-cell Li-ion stack and need a regulated 3.3 V rail to power the display, Bluetooth module, and measurement front end. The TPS62172QDSGRQ1 handles the 9 V to 16.8 V Li-ion envelope directly, and its 17 uA quiescent current extends battery standby between charges. The 2 mm x 2 mm 8-WSON package leaves room for the battery management circuitry in space-constrained enclosures.
Recommended
Recommended Products Summary
Engineering reference data for TPS62172QDSGRQ1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TPS62173QDSGRQ1 | TPS62170QDSGRQ1 | TPS62160QDSGRQ1 | TPS62175QDSGRQ1 | TPS62177QDSGRQ1 |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 8-WSON EP (DSG) 2x2 mm | 8-WSON EP (DSG) 2x2 mm - same | 8-WSON EP (DSG) 2x2 mm - same | 8-WSON EP (DSG) 2x2 mm - same | 8-WSON EP (DSG) 2x2 mm - same | 8-WSON EP (DSG) 2x2 mm - same |
| Input Voltage Range | 3 V to 17 V | 3 V to 17 V - same | 3 V to 17 V - same | 3 V to 17 V - same | 3 V to 17 V - same | 3 V to 17 V - same |
| Output Voltage | 3.3 V fixed | 5 V fixed | Adjustable 0.9 V to 6 V | Adjustable 0.9 V to 6 V | Fixed (variant, see datasheet) | Fixed (variant, see datasheet) |
| Output Current | 500 mA | 500 mA - same | 500 mA - same | 1 A (2x TPS62172QDSGRQ1) | 500 mA - same | 500 mA - same |
| Switching Frequency | 2.25 MHz (typ) | 2.25 MHz - same | 2.25 MHz - same | 2.25 MHz - same | 2.25 MHz - same | 2.25 MHz - same |
| Quiescent Current | 17 uA | 17 uA - same | 17 uA - same | 17 uA - same | 17 uA - same | 17 uA - same |
| AEC-Q100 Grade | Qualified | Qualified | Qualified | Qualified | Qualified | Qualified |
Key Differentiators
- Fixed 3.3 V output eliminates external feedback divider (vs TPS62170QDSGRQ1)
- Highest output voltage option in family (vs TPS62173QDSGRQ1 (5 V))
- Higher current capability same footprint (vs TPS62160QDSGRQ1)
Design Notes
Place the 1.0 uH to 2.2 uH shielded inductor as close as possible to the SW pin (pin 7) and route the high-frequency loop (VIN - high-side FET - SW - low-side FET - PGND) over a tight, minimal-area copper island. The VIN ceramic bypass (10 uF X7R plus a 100 nF high-frequency NPO) must sit within 2 mm of pin 2. The exposed pad must be soldered to a continuous ground copper pour of at least 100 mm squared on the top and bottom layers, stitched with thermal vias, to achieve the 8-WSON thermal resistance required for sustained 500 mA at 17 V VIN.
Do not exceed the 17 V absolute maximum at VIN; on the automotive 12 V bus, transient suppressors (TVS) are still recommended for load-dump events that can briefly exceed 17 V and force the part into over-voltage lockout. The output voltage accuracy (about 2% over temperature) means downstream loads should tolerate a 3.23 V to 3.37 V range. The PG pin is open-drain and requires an external pull-up resistor (typically 100 kohm to VOUT) - leaving it floating does not indicate an error condition correctly.
Estimated: at full 500 mA load, VIN = 12 V, VOUT = 3.3 V, the converter's typical efficiency is approximately 90% (per TI datasheet typical curves), dissipating roughly 0.6 W inside the 2 mm x 2 mm package. With the exposed pad connected to ~100 mm squared of ground copper on a 2-oz 4-layer board, the expected theta_JA is below 70 C/W, yielding a junction temperature rise of about 42 C above the 85 C automotive cabin ambient, well below the 125 C maximum.
Compliance Information
AEC-Q100 qualified by Texas Instruments (automotive grade). RoHS compliant per distributor listings; halogen-free status not explicitly stated in provided data and is marked unknown. The '-Q1' suffix confirms AEC-Q100 qualification.
