TPS40170QRGYRQ1 - 60V Sync Buck Controller, AEC-Q100 | Texas Instruments
MPN: TPS40170QRGYRQ1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.18 | $7.18 |
| 10 | $6.32 | $63.20 |
| 100 | $5.18 | $518.00 |
| 500 | $4.4 | $2,200.00 |
| 1,000 | $3.85 | $3,850.00 |
TPS40170QRGYRQ1 Overview
A buck controller (as opposed to a fully integrated buck regulator) is a DC-DC switching controller that uses external power MOSFETs to deliver load currents far beyond what a small integrated regulator can supply. The TPS40170QRGYRQ1 sits in the synchronous-buck-controller family of TI's power-management portfolio, between low-current LDO regulators and fully integrated buck converters; designers choose it when output current (up to 20A depending on MOSFET selection) or thermal headroom requires splitting the power stage from the control IC. Synchronous rectification replaces the Schottky freewheel diode with a low-side MOSFET, cutting conduction loss roughly in half versus asynchronous buck.
Key features include an ENABLE pin for low-IQ shutdown (1 uA typical), pre-biased output support for safe start-up into pre-charged loads, an open-drain PGOOD signal for sequencing, closed-loop soft-start, output-voltage tracking, adaptive dead-time control, and 1% output voltage accuracy. The RGY package exposes a thermal pad (theta_JA around 35 C/W on a 4-layer JEDEC board) so the controller itself stays cool while the external MOSFETs handle bulk losses.
Typical applications span automotive infotainment, ADAS sensor rails, body electronics, and industrial 24V/48V bus converters where wide input range is mandatory. Designers typically pair it with CSD18531Q5A NexFET power MOSFETs and a TPS3702 window supervisor for fault handling. Order today from XAIPART with full traceability and immediate shipping on qualified orders.
Drop-in alternatives for TPS40170QRGYRQ1 — 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 TPS40170QRGYRQ1 (same form factor and footprint) — differing in Package, Output Voltage Range, Topology, Dead-Time Control, MSL Level.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
TPS40170RGYR
✅ Drop-In✓ In Stock
$1.45 / Unit
View Datasheet →TPS40170RGYT
✅ Drop-In📋 Reference alternative (not in catalog)
TPS40170QRGYTT
✅ Drop-In📋 Reference alternative (not in catalog)
TPS40170QRGYRQ1 Maximum Ratings & Electrical Characteristics
| Topology | Synchronous Buck Controller |
| Input Voltage Range | 4.5 V to 60 V |
| Output Voltage Range | 0.6 V to 57 V |
| Maximum Output Current (with ext. MOSFETs) | 20 A |
| Switching Frequency Range | 100 kHz to 600 kHz |
| Reference Voltage Accuracy | 1 % |
| Quiescent Current (typ) | 4.5 mA |
| Shutdown Current | 1 uA typical |
| Output Voltage Tracking | Yes |
| Pre-Biased Output Support | Yes |
| PGOOD Signal | Open-drain |
| Soft-Start | Closed-loop |
| Dead-Time Control | Adaptive |
| Operating Temperature Range (AEC-Q100 Grade 1) | -40 C to +125 C |
| Package | 20-VQFN (RGY) 3.5 x 4.5 mm |
| Mounting Type | Surface Mount |
| MSL Level | 2 (1 year) |
| AEC-Q100 Qualification | Qualified |
TPS40170QRGYRQ1 Pin Configuration
| Pin 1 | BST — Bootstrap capacitor for high-side gate drive |
| Pin 2 | DRVH — High-side gate driver output |
| Pin 3 | SW — Switch node - connection point for external L and C |
| Pin 4 | DRVL — Low-side gate driver output |
| Pin 5 | PGND — Power ground - return for gate drivers |
| Pin 6 | VIN — Input supply voltage (4.5V to 60V) |
| Pin 7 | EN — Enable pin - high enables device, low = 1 uA shutdown |
| Pin 8 | VREF — Internal reference bypass |
| Pin 9 | VCC — Internal 5V LDO output for gate driver supply |
| Pin 10 | RT/SS — Timing resistor and soft-start capacitor node |
| Pin 11 | COMP — Compensation network for error amplifier |
| Pin 12 | ILIM — Current-limit threshold setting |
| Pin 13 | PWM/SS_DIS — PWM mode select and SS discharge |
| Pin 14 | FB — Feedback input - connect to VOUT resistor divider |
| Pin 15 | TRACK — Output voltage tracking input |
| Pin 16 | PGOOD — Power-good open-drain output |
| Pin 17 | AGND — Analog ground |
| Pin 18 | NC — Not connected (per datasheet) |
| Pin 19 | NC — Not connected (per datasheet) |
| Pin 20 | NC — Not connected (per datasheet) |
| Pin 21 | PAD — Thermal pad - connect to PGND |
Typical Applications
TPS40170QRGYRQ1 is suitable for 6 applications: Automotive Infotainment Power Rails, ADAS Sensor Power (Camera / Radar), Industrial 24V/48V Bus Converters, USB Power Delivery (PD) Source Sinks, Battery-Powered Industrial Test Equipment, Telecom and Networking Brick Converters.
Automotive Infotainment Power Rails
The TPS40170QRGYRQ1 supplies 3.3V, 5V, and 8V rails to infotainment head units, audio amplifiers, and cluster displays from the vehicle 12V battery and load-dump-tolerant input. With 4.5V to 60V VIN tolerance it survives load-dump transients up to 35V without external clamp circuits, while its 600 kHz maximum switching frequency shrinks the inductor to fit behind tight dashboard bezels. The 1 uA shutdown quiescent current is critical for parked-vehicle standby that meets OEM quiescent-current budgets under 100 uA. Designers pair it with CSD18531Q5A NexFETs to deliver 8-15A continuous at >92% efficiency.
Recommended
ADAS Sensor Power (Camera / Radar)
The TPS40170QRGYRQ1 provides ultra-low-noise point-of-load regulation for ADAS camera ISP, radar MMIC, and LiDAR sensor FPGA rails where noise directly corrupts sensor accuracy. Pre-biased output support lets it start up into the bulk capacitance of always-on sensor processors without causing reverse-current faults. Output-voltage tracking synchronizes the sensor rail ramp with upstream PMIC sequencing, eliminating inrush transients that could distort calibration. The AEC-Q100 Grade 1 rating to +125 C supports under-hood and behind-bumper mounting for surround-view systems.
Recommended
Industrial 24V/48V Bus Converters
Factory-automation PLCs, motor-drive auxiliary rails, and building-automation controllers all feed from 24V industrial buses that can surge to 60V under load switching. The TPS40170QRGYRQ1's 4.5V-60V VIN eliminates the input protection MOSFETs required by narrower-VIN controllers, cutting BOM cost and board area. Adaptive dead-time control minimizes body-diode conduction in the synchronous FETs, hitting >95% efficiency at 12V-to-3.3V conversion at 5A load. The closed-loop soft-start and PGOOD output integrate cleanly into PLC hot-swap architectures.
Recommended
USB Power Delivery (PD) Source Sinks
USB-PD source controllers negotiate 5V/9V/15V/20V output profiles, and the TPS40170QRGYRQ1's 0.6V-57V output range with 1% accuracy maps cleanly onto every PD fixed and Programmable Power Supply (PPS) voltage level. Its wide VIN range lets the same design serve 12V automotive or 24V industrial input buses. The closed-loop soft-start prevents backdriving into a Type-C sink during contract renegotiation, and the open-drain PGOOD signals the PD controller when output regulation is within tolerance. Pairing with a TPS25750 PD controller yields a complete USB-PD source solution.
Recommended
Battery-Powered Industrial Test Equipment
Handheld test meters and portable data-acquisition systems run on 4S-6S lithium packs where VIN can swing from 12V nominal to 25.2V full charge and down to 10V under load. The TPS40170QRGYRQ1 handles this 10V-25V swing natively while maintaining tight 1% regulation on the 5V and 3.3V rails that power the ADC, MCU, and LCD backlight. Output-voltage tracking allows MCU firmware to command margin testing on the ADC supply for self-calibration routines. The 1 uA shutdown current is critical for extending shelf life of battery-held instruments awaiting calibration.
Recommended
Telecom and Networking Brick Converters
PoE-powered devices and small-cell base stations run from -48V telecom rails that, after protection rectifiers, present roughly -38V to -60V to downstream regulators. The TPS40170QRGYRQ1's 60V absolute-maximum input accommodates these rails without requiring pre-regulation. At 100% duty cycle it can pass-through the input to the load during line-loss events, while PWM operation delivers step-down conversion for 12V and 5V subsystem rails. Adaptive dead-time control minimizes shoot-through in the synchronous FETs, keeping EMI below telecom CISPR 22 limits.
Recommended
Recommended Products Summary
Engineering reference data for TPS40170QRGYRQ1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TPS40170RGYR | TPS40170RGYT | TPS40170QRGYTT |
|---|---|---|---|---|
| Package | 20-VQFN (RGY) 3.5x4.5 mm | 20-VQFN (RGY) 3.5x4.5 mm - same | 20-VQFN (RGY) 3.5x4.5 mm - same | 20-VQFN (RGY) 3.5x4.5 mm - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Input Voltage Range | 4.5 V to 60 V | 4.5 V to 60 V | 4.5 V to 60 V | 4.5 V to 60 V |
| Switching Frequency Range | 100 kHz to 600 kHz | 100 kHz to 600 kHz | 100 kHz to 600 kHz | 100 kHz to 600 kHz |
| Output Voltage Range | 0.6 V to 57 V | 0.6 V to 57 V | 0.6 V to 57 V | 0.6 V to 57 V |
| Reference Voltage Accuracy | 1 % | 1 % | 1 % | 1 % |
| Quiescent Current (typ) | 4.5 mA | 4.5 mA | 4.5 mA | 4.5 mA |
| AEC-Q100 Qualification | Yes (Grade 1, +125 C) | No (industrial grade) | No (industrial grade) | Yes (Grade 1) |
| Reel Quantity | 2,500 | 2,500 | 250 | 250 |
Key Differentiators
- AEC-Q100 Grade 1 qualified for +125 C ambient automotive operation (vs TPS40170RGYR)
- 60V wide-input range eliminates input protection MOSFETs (vs Most automotive buck controllers)
- Pre-biased output support prevents reverse-current at startup (vs Generic sync buck controllers)
Design Notes
Estimated: the TPS40170QRGYRQ1 itself dissipates roughly 50-150 mW from driving external MOSFETs (VCC LDO plus gate charge), so the VQFN-20 thermal pad (theta_JA around 35 C/W on a 4-layer JEDEC board) handles controller heating easily. However, the external high-side and low-side MOSFETs are the primary thermal load - pair CSD18531Q5A NexFETs sized for total conduction-plus-switching loss under 1W each for the automotive target. Always flood the PGND copper pour on top and bottom layers and stitch with at least 8 thermal vias directly under the exposed pad.
Keep the high-current loop - input capacitor, high-side MOSFET, low-side MOSFET, and PGND - as tight as possible to minimize EMI and voltage spikes. The bootstrap capacitor (pin BST to SW) should be a 100 nF X7R placed within 2 mm of the BST pin. Route the FB trace away from the SW node and gate driver traces; use a Kelvin connection to the output sense point for 1% accuracy. Place the RT/SS resistor and capacitor close to pins 10 to prevent noise injection into the oscillator.
Do not exceed 60V at VIN - load-dump transients above 70V will damage the IC even with AEC-Q100 ESD clamps. Always add a TVS (such as SMBJ58A) rated above 60V working but below VIN absolute-max for fault protection. When using pre-biased output support, ensure the SS capacitor value matches your output capacitance - undersized SS caps cause large dV/dt and overshoot at startup. The ILIM pin voltage sets the cycle-by-cycle current limit; verify with worst-case inductor ripple, not just DC load.
Compliance Information
AEC-Q100 Grade 1 qualified per TI datasheet. RoHS and REACH compliance confirmed by Texas Instruments product information. Halogen-free status not explicitly stated in provided data.
