TPS57140QDGQRQ1 - 42V 1.5A AEC-Q100 Buck Converter | TI
MPN: TPS57140QDGQRQ1 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.17 | $3.17 |
| 10 | $2.86 | $28.60 |
| 100 | $2.55 | $255.00 |
| 500 | $2.29 | $1,145.00 |
| 1,000 | $2.05 | $2,050.00 |
TPS57140QDGQRQ1 Overview
A DC-DC buck converter is a switching voltage regulator that steps a higher DC voltage down to a lower one using an internal switch, an inductor, and a diode (or synchronous rectifier). Within the power-management hierarchy - voltage regulator -> switching regulator -> step-down converter -> point-of-load regulator - the buck converter is the workhorse of every automotive electronic control unit, converting battery or load-dump-derived rails into clean, efficient low voltages.
Key features include AEC-Q100 qualification for 42 V input operation (covering 12 V and 24 V automotive battery systems plus load-dump transients), TI SWIFT (TM) architecture with peak current-mode control for simple external compensation, and Eco-Mode (TM) pulse-skip operation that reduces no-load regulated supply current to just 116 uA. Shutdown current drops to 1.5 uA when the enable pin is pulled low, extending battery life in always-on modules.
Technical depth: the current-mode topology provides inherent cycle-by-cycle current limiting, fast transient response, and a single compensation network. The nonsynchronous design (external catch diode) gives freedom to optimize diode voltage rating and thermal placement. The integrated 200 mOhm high-side FET minimizes conduction loss, while the adjustable RT/CLK pin sets switching frequency and supports synchronization to an external clock for EMI-sensitive designs.
Typical applications include automotive infotainment and cluster power supplies, camera modules and ADAS sensor rails, body electronics and lighting pre-regulators, and industrial 24 V bus point-of-load conversion. The wide 42 V input rating makes it equally suited to 12 V and 24 V systems without front-end pre-regulation.
Design consideration: the nonsynchronous output requires a properly rated Schottky catch diode; at high VIN-to-VOUT ratios, diode loss dominates, so select a 40-60 V Schottky with low reverse leakage at operating temperature. Keep the PowerPAD soldered to a generous ground pour for thermal relief.
This page synthesizes distributor pricing, drop-in family alternatives, AEO-optimized FAQs, and practical design notes not found in the manufacturer datasheet, based on data verified 2026-09-10.
Drop-in alternatives for TPS57140QDGQRQ1 β 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 TPS57140QDGQRQ1 (same form factor and footprint) β differing in Automotive Qualification, Control Topology, Input Voltage Range, Output Voltage Range, Package.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
TPS57160QDGQRQ1
β Drop-Inβ In Stock
$2.98 / Unit
View Datasheet βTPS57060QDGQRQ1
β Drop-Inπ Reference alternative (not in catalog)
TPS57040QDGQRQ1
β Drop-Inπ Reference alternative (not in catalog)
TPS57140QDGQRQ1 Maximum Ratings & Electrical Characteristics
| Topology | Step-Down (Buck), Nonsynchronous |
| Input Voltage Range | 3.5 V to 42 V |
| Output Voltage Range | 0.8 V to 39 V (adjustable) |
| Maximum Output Current | 1.5 A |
| Control Topology | Peak Current Mode |
| High-Side MOSFET Rds(on) | 200 mOhm (integrated) |
| Eco-Mode No-Load Supply Current | 116 uA (regulated, pulse-skip) |
| Shutdown Current | 1.5 uA (EN low) |
| Number of Outputs | 1 |
| Synchronous Rectifier | No |
| Enable Pin | Yes (EN) |
| Frequency Synchronization | Yes (RT/CLK pin) |
| Undervoltage Lockout | Yes (UVLO) |
| Operating Temperature Range | -40C to +150C |
| Automotive Qualification | AEC-Q100 Qualified (Q1) |
| Package | 10-Pin HVSSOP / MSOP-PowerPAD (DGQ), 3.00 mm width |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
TPS57140QDGQRQ1 Pin Configuration
| Pin 1 | BOOT β Bootstrap supply for high-side gate driver; connect capacitor from BOOT to PH |
| Pin 2 | VIN β Input supply voltage, 3.5 V to 42 V |
| Pin 3 | EN β Enable pin; pull low for 1.5 uA shutdown |
| Pin 4 | RT/CLK β Frequency-set resistor or external synchronization clock input |
| Pin 5 | COMP β Error amplifier output for loop compensation |
| Pin 6 | GND β Ground |
| Pin 7 | VSENSE β Feedback voltage sense input for output regulation |
| Pin 8 | SS/TR β Soft-start / tracking input |
| Pin 9 | PH β Switching (phase) node; connect to inductor and catch diode |
| Pin 10 | NC β Not connected (per datasheet); PowerPAD serves as ground/thermal connection |
Typical Applications
TPS57140QDGQRQ1 is suitable for 6 applications: Automotive Infotainment and Cluster Power, ADAS Camera and Sensor Module Power, Industrial 24 V Bus Point-of-Load Conversion, Body Electronics and Lighting Pre-Regulators, Battery-Powered Telematics and Gateways, Test and Measurement Instrument Rails.
Automotive Infotainment and Cluster Power
The TPS57140QDGQRQ1 is well suited to infotainment head units and instrument clusters, where it typically pre-regulates the 12 V battery rail down to intermediate rails (5 V, 3.3 V) feeding audio amplifiers, processors, and display drivers. Its 42 V AEC-Q100 input rating absorbs transient conditions on automotive battery buses, and the 200 mOhm integrated high-side MOSFET keeps conduction losses low at the 1-1.5 A loads typical of these modules. Eco-Mode pulse-skip operation reduces standby current to 116 uA, supporting OEM key-off sleep-current budgets, while the 1.5 uA shutdown current protects battery state-of-charge during extended parking. The RT/CLK pin allows synchronization to a central clock, moving switching tones away from AM radio bands and simplifying system EMI compliance.
Recommended
ADAS Camera and Sensor Module Power
Camera modules, radar, and ultrasonic sensor EUs in ADAS domains need compact, low-noise, thermally efficient rails derived from vehicle battery power. The TPS57140QDGQRQ1 delivers 1.5 A from a 3.5 V to 42 V input in a 3 mm-wide HVSSOP-PowerPAD package, fitting space-constrained camera housings. Peak current-mode control gives fast transient response for image-sensor supply sequencing, and the adjustable RT/CLK frequency plus external synchronization lets designers place switching artifacts away from sensitive analog front-end bands. Eco-Mode maintains efficiency in low-duty-cycle standby monitoring, and 116 uA no-load draw suits always-aware parking-surveillance modes. The PowerPAD soldered to a solid ground pour provides the thermal path required for continuous operation in sealed, high-temperature enclosures near the windshield.
Recommended
Industrial 24 V Bus Point-of-Load Conversion
Although automotive-qualified, the TPS57140QDGQRQ1 is equally effective on industrial 24 V buses - PLC I/O modules, motor-control logic supplies, and factory sensors. The 42 V input ceiling provides headroom above unregulated 24 V supplies that can surge during load events, often eliminating a discrete pre-regulator stage. Its current-mode architecture requires only a single compensation network, shortening design cycles for mixed rails of 3.3 V, 5 V, and 12 V. With 116 uA no-load supply current, it suits remote battery-backed telemetry nodes, and the nonsynchronous topology allows a standard 60 V Schottky catch diode selected for the exact bus voltage and temperature. AEC-Q100 ruggedness transfers directly to high-vibration, wide-temperature industrial environments.
Recommended
Body Electronics and Lighting Pre-Regulators
Body-control modules, door-zone ECUs, LED headlamp drivers, and interior lighting controllers all begin with a battery-to-logic buck stage. The TPS57140QDGQRQ1's 42 V qualified input covers 12 V and 24 V body buses and load-dump events when paired with front-end TVS protection such as SMBJ6.0CA. The 1.5 A capability feeds microcontrollers plus driver logic, while Eco-Mode (116 uA no-load) meets stringent key-off quiescent specs across many parallel modules. UVLO ensures clean startup on cranking transients, and the SS/TR soft-start pin shapes inrush so lamp-load capacitors charge without tripping current limit. Its small DGQ footprint suits dense body-module PCBs with multiple independent local converters.
Recommended
Battery-Powered Telematics and Gateways
Telematics control units, asset trackers, and fleet gateways remain partially powered whenever the vehicle or asset is on battery, making quiescent current the defining design constraint. The TPS57140QDGQRQ1 addresses this directly: 116 uA no-load regulated supply current in Eco-Mode and only 1.5 uA shutdown with EN low. A supervisory circuit can gate the EN pin so the converter fully sleeps between reporting intervals. Its 3.5 V minimum input even supports operation from deeply discharged batteries, and the 42 V ceiling tolerates jump-start and charging transients. Pairing with a low-IQ supervisor and the DGQ PowerPAD thermal design yields a converter stage that meets multi-year battery-life targets without sacrificing 1.5 A peak capability for cellular transmit bursts.
Recommended
Test and Measurement Instrument Rails
Portable and bench instruments with wide input bricks (e.g., 24 V or automotive-adjacent adapters) use the TPS57140QDGQRQ1 as a robust first-stage buck ahead of linear post-regulators for low-noise analog rails. Its peak current-mode loop is easy to compensate, and the RT/CLK synchronization input lets designers spread or fix the switching frequency to avoid beating with sensitive measurement circuitry or to cluster switching noise out of a measurement band. The 1.5 A rating covers MCU, FPGA I/O, and display power; downstream an LDO can remove residual ripple for analog front ends. AEC-Q100 process quality adds margin over commercial-grade alternatives in instruments subjected to harsh field environments.
Recommended
Recommended Products Summary
Engineering reference data for TPS57140QDGQRQ1 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TPS57160QDGQRQ1 | TPS57060QDGQRQ1 | TPS57040QDGQRQ1 |
|---|---|---|---|---|
| Package | 10-HVSSOP / MSOP-PowerPAD (DGQ) | 10-HVSSOP / MSOP-PowerPAD (DGQ) - same | 10-HVSSOP / MSOP-PowerPAD (DGQ) - same | 10-HVSSOP / MSOP-PowerPAD (DGQ) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Output Current | 1.5 A | 1.5 A | 1.5 A (family spec) | 0.5 A |
| Automotive Grade (AEC-Q100) | Yes (Q1) | Yes (Q1) | Yes (Q1) | Yes (Q1) |
| Control Topology | Peak Current Mode (SWIFT) | Peak Current Mode (SWIFT) | Peak Current Mode (SWIFT) | Peak Current Mode (SWIFT) |
| Eco-Mode Light-Load Operation | Yes (116 uA no-load) | Yes (Eco-Mode) | Yes (Eco-Mode) | Yes (Eco-Mode) |
Key Differentiators
- Higher input headroom without redesign (vs TPS57160QDGQRQ1)
- Validated drop-in second source within family (vs TPS57060QDGQRQ1)
- Triple the output current of the low-cost family member (vs TPS57040QDGQRQ1)
- Trade-off: nonsynchronous efficiency at light loads (vs TPS57160QDGQRQ1)
Design Notes
The DGQ package relies on its PowerPAD for heat removal: solder the exposed pad to at least a 4x4 via array into a solid ground pour on a 2 oz copper layer. Estimated: at VIN=24 V, VOUT=5 V, 1.5 A load, output power is 7.5 W; with roughly 90% efficiency the device dissipates about 0.8 W. With an effective theta_JA near 40-50 C/W on a good pour, expect roughly 32-40 C junction rise - verify against the datasheet thermal table for your board stack-up.
This is a nonsynchronous converter: the external catch diode conducts during every off-time. Select a Schottky with reverse voltage at least 1.2x VIN max (e.g., 60 V part for a 42 V system), average current rating above 1.5 A, and low reverse leakage at your maximum board temperature - leakage can dominate standby loss in Eco-Mode. Place the diode within a few millimeters of the PH and GND pins to minimize the hot loop area and ringing at the switching node.
Keep the input loop (VIN pin, ceramic input capacitor, GND/PowerPAD) and the power loop (VIN, high-side FET, PH, catch diode, GND) as tight as possible; use a 10 uF X7R ceramic directly at VIN with a 0.1 uF in parallel for high frequencies. Route VSENSE as a Kelvin connection from the output capacitor, away from the PH node, to avoid feedback corruption. Connect the RT/CLK resistor to a quiet ground reference. Follow the layout example figure in the TI datasheet.
Do not leave the BOOT capacitor undersized or omit it - the high-side driver cannot charge and the converter will fail to switch. Respect UVLO behavior on cranking transients: a slowly collapsing VIN can cause erratic switching if the EN divider thresholds are not coordinated with UVLO. When synchronizing via RT/CLK, ensure the external clock is within the datasheet sync window and always keep the frequency-set resistor populated as a fallback.
Compliance Information
AEC-Q100 qualified (Q1 suffix, automotive grade) per TI product page. RoHS compliance and lead-free status per DigiKey/TI listings. REACH, halogen-free, and conflict-minerals statements not stated in provided data - request from TI.
