TPS54341DPRR - 42V, 3.5A Step-Down DC-DC Converter | TI
MPN: TPS54341DPRR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.86 | $4.86 |
| 10 | $4.37 | $43.70 |
| 100 | $3.78 | $378.00 |
| 500 | $3.39 | $1,695.00 |
| 1,000 | $3 | $3,000.00 |
| 3,000 | $2.62 | $7,860.00 |
TPS54341DPRR Overview
A buck converter (step-down switching regulator) is a switch-mode power supply topology that converts a higher DC input voltage to a lower, regulated DC output voltage. The TPS54341DPRR belongs to the broader hierarchy: DC-DC converter -> switching regulator -> buck converter -> non-isolated POL (point-of-load) regulator -> power management IC. Buck regulators are the dominant choice for high-efficiency (>90%) intermediate bus and load-point conversion in 12-V, 24-V, and industrial 24-V battery systems, where linear regulators would dissipate unacceptable amounts of power as heat.
Key features include 152 uA quiescent current at no load using Eco-Mode pulse-skipping, 2 uA shutdown current when the enable (EN) pin is pulled low, internal soft-start, and cycle-by-cycle current-limit protection. The internal 92-mΩ high-side MOSFET minimizes conduction losses, while the current-mode control loop maintains stable regulation across line, load, and temperature variations. The exposed thermal pad on the WSON-10 package reduces junction-to-PCB thermal resistance to roughly 30 °C/W on a standard 4-layer 1-oz copper board, supporting continuous 3.5-A operation at moderate VIN-VOUT deltas.
The TPS54341 uses peak-current-mode control with internal slope compensation, allowing Type II/III networks to be added at the COMP pin for compensation. Switching frequency is set by an external RT resistor to ground on the RT/SS pin, typically between 100 kHz and 2.5 MHz, which lets designers trade off efficiency against solution size. The wide VIN range makes the part popular in 12-V and 24-V industrial systems, automotive body electronics, and distributed 48-V-to-POL intermediate bus architectures.
Typical applications include industrial 24-V sensor and actuator rails, automotive infotainment and body controllers, 12-V/24-V battery-powered point-of-load regulators, distributed power architectures in PLCs and HMIs, and telecom/datacom 48-V intermediate bus converters. The ISO 7637 load-dump tolerance makes it especially attractive for vehicles where transients on the battery rail can exceed 40 V during cranking pulse events.
When designing with the TPS54341DPRR, select the RT resistor for the desired switching frequency, choose an inductor with saturation current >= 4 A and DC rating >= 3.5 A, and place input ceramic bypass capacitors (typically 2 x 10 uF) as close to the PGND and VIN pins as possible. The exposed thermal pad must be soldered to a continuous ground plane to achieve rated thermal performance.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for TPS54341DPRR — 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:
TPS54361DPRR
✅ Drop-In📋 Reference alternative (not in catalog)
TPS54361QDPRRQ1
✅ Drop-In📋 Reference alternative (not in catalog)
TPS54341DPRT
✅ Drop-In📋 Reference alternative (not in catalog)
TPS54341DPRR Maximum Ratings & Electrical Characteristics
| Topology | Buck (step-down), synchronous with internal high-side MOSFET |
| Input Voltage Range | 4.5 V to 42 V |
| Load-Dump Survivability | 45 V per ISO 7637 |
| Output Voltage Range | 0.8 V to ~39 V (adjustable) |
| Continuous Output Current | 3.5 A |
| High-Side MOSFET Rds(on) | 92 mΩ (typical) |
| Quiescent Current (no load, Eco-Mode) | 152 uA |
| Shutdown Supply Current | 2 uA |
| Switching Frequency Range | 100 kHz to 2.5 MHz (externally set) |
| Control Architecture | Peak current-mode with internal slope compensation |
| Soft-Start | Internal, externally adjustable via RT/SS capacitor |
| Operating Temperature | -40 °C to +85 °C |
| Package | 10-pin WSON (DPR), 4 mm x 4 mm with exposed thermal pad |
| Mounting Type | Surface Mount |
| MSL Level | 2 (per JEDEC J-STD-020) |
| Enable Pin | Yes (active high) |
| RoHS Status | Compliant |
| AEC-Q100 Automotive Grade | Not qualified (non-automotive grade) |
TPS54341DPRR Pin Configuration
| Pin 1 | PGND — Power ground return for internal high-side MOSFET |
| Pin 2 | VIN — Input supply voltage, 4.5 V to 42 V |
| Pin 3 | EN — Enable pin (active high); pull low for 2 uA shutdown |
| Pin 4 | RT/SS — Frequency set resistor and soft-start capacitor node |
| Pin 5 | COMP — Compensation network node for the error amplifier |
| Pin 6 | FB — Feedback input, internal 0.8 V reference |
| Pin 7 | AGND — Analog ground for low-noise reference and control |
| Pin 8 | BST — Bootstrap capacitor for high-side gate drive |
| Pin 9 | SW — Switch node - connect to power inductor |
| Pin 10 | PAD — Exposed thermal pad, must be soldered to PGND copper pour |
Typical Applications
TPS54341DPRR is suitable for 6 applications: Industrial 24-V Sensor and Actuator Rails, Automotive Body and Infotainment ECUs, 12-V Battery-Powered Point-of-Load Conversion, 48-V Telecom Intermediate Bus Converters, PLC and Industrial HMI Logic Rails, Building Automation and HVAC Controllers.
Industrial 24-V Sensor and Actuator Rails
The TPS54341DPRR is purpose-built for industrial 24-V distributed power rails where sustained input transients on the factory floor routinely push VIN above 30 V. Its 4.5-V to 42-V input range plus 45-V ISO 7637 load-dump survivability lets it ride through motor back-EMF and switching surges without external TVS clamps. At a 24-V to 5-V conversion with 3 A load the part delivers >93% peak efficiency, while the 152-uA Eco-Mode IQ keeps standby losses negligible for always-on sensor nodes. The 10-pin WSON footprint (4 mm x 4 mm) fits easily alongside PLC logic, and the exposed thermal pad plus 92-mΩ internal MOSFET keep junction temperatures in spec on a 4-layer 1-oz copper board.
Recommended
Automotive Body and Infotainment ECUs
The TPS54341DPRR's 45-V load-dump tolerance per ISO 7637 makes it a strong fit for 12-V automotive body controllers, instrument clusters, and head-unit infotainment rails. Current-mode control with internal slope compensation maintains stable regulation across cranking pulses (which can briefly pull the battery below 6 V) and load-dump events up to 45 V. The 3.5-A continuous output comfortably powers display backlight drivers, CAN transceivers, and small SoCs from a single POL stage. Use the TPS54361QDPRRQ1 instead if AEC-Q100 qualification is contractually required.
Recommended
12-V Battery-Powered Point-of-Load Conversion
When a 12-V sealed lead-acid or Li-ion battery feeds mixed digital and analog loads, the TPS54341DPRR delivers a tightly regulated 3.3-V or 5-V rail at up to 3.5 A from its integrated high-side MOSFET. The 152-uA Eco-Mode quiescent current at no load and 2-uA shutdown current extend standby time on battery-backed systems like security panels and emergency lighting controllers. The wide VIN range also makes it tolerant of chargers and boost front-ends that overshoot nominal battery voltage during regulation transitions.
Recommended
48-V Telecom Intermediate Bus Converters
Distributed 48-V telecom and datacom boards benefit from the TPS54341DPRR's 42-V continuous / 45-V transient headroom combined with 3.5-A load capability for downstream POL stages. Switching frequency can be set up to 2.5 MHz to shrink output LC filters when board area is at a premium. The exposed-pad WSON-10 footprint keeps the converter compact while the 92-mΩ high-side MOSFET minimizes conduction loss in 48-V-to-5-V intermediate bus designs that feed multiple ASIC rails.
Recommended
PLC and Industrial HMI Logic Rails
Programmable logic controllers and human-machine interfaces require robust 24-V-to-5-V or 24-V-to-3.3-V conversion with tight regulation and high efficiency across a wide load range. The TPS54341DPRR's peak current-mode control, internal soft-start, and cycle-by-cycle current limit make it ideal for these multi-rail industrial HMIs and PLCs. The 10-pin WSON package occupies only 16 mm² of board area, and the 152-uA Eco-Mode keeps standby dissipation low for cabinet-mounted equipment that spends most of its time in idle polling.
Recommended
Building Automation and HVAC Controllers
Building automation controllers and HVAC modules run from 24-V AC-derived DC supplies with significant line-frequency ripple and switching transients. The TPS54341DPRR's wide 4.5-V to 42-V input tolerates under-voltage brownouts and surge events typical of these environments, while its 3.5-A output comfortably powers relay drivers, triac interfaces, and 3.3-V/5-V sensor and communication rails from a single buck stage. Eco-Mode's 152-uA quiescent current is a strong match for low-power sensor nodes that spend long intervals in standby.
Recommended
Recommended Products Summary
Engineering reference data for TPS54341DPRR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TPS54361DPRR | TPS54361QDPRRQ1 | TPS54341DPRT |
|---|---|---|---|---|
| Package | 10-pin WSON (DPR), 4 mm x 4 mm | 10-pin WSON (DPR), 4 mm x 4 mm - same | 10-pin WSON (DPR), 4 mm x 4 mm - same | 10-pin WSON (DPR), 4 mm x 4 mm - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Input Voltage Range | 4.5 V to 42 V | 4.5 V to 60 V | 4.5 V to 60 V | 4.5 V to 42 V |
| Continuous Output Current | 3.5 A | 3.5 A | 3.5 A | 3.5 A |
| Output Voltage Range | 0.8 V to ~39 V adjustable | 0.8 V to ~58 V adjustable | 0.8 V to ~58 V adjustable | 0.8 V to ~39 V adjustable |
| Quiescent Current (Eco-Mode) | 152 uA | 152 uA | 152 uA | 152 uA |
| Shutdown Current | 2 uA | 2 uA | 2 uA | 2 uA |
| Switching Frequency Range | 100 kHz to 2.5 MHz | 100 kHz to 2.5 MHz | 100 kHz to 2.5 MHz | 100 kHz to 2.5 MHz |
| Automotive Grade (AEC-Q100) | Not qualified | Not qualified | Qualified (Q1 suffix) | Not qualified |
Key Differentiators
- Wide 42-V input range with 45-V ISO 7637 load-dump survivability (vs TPS54331DR (28-V, 3-A SOIC-8))
- Higher output current capability than the TPS54340 family (vs TPS54340DDAR (8-pin SO PowerPAD))
- 152-uA Eco-Mode IQ is best-in-class for always-on 24-V industrial rails (vs TPS54361DPRR (60 V sister))
Design Notes
Estimated: At VIN = 24 V, VOUT = 5 V, IOUT = 3.5 A, conduction loss in the internal 92-mΩ high-side MOSFET (at ~50% duty cycle, ~30°C junction rise over ambient) plus switching loss places roughly 1.5-2.5 W in the package. The 10-pin WSON (DPR) with a continuously soldered exposed thermal pad to a 1-oz 4-layer PCB ground pour yields theta_JA of about 30-35 °C/W. Solder the exposed pad with at least 6 thermal vias to the inner ground plane to stay within the -40 °C to +85 °C operating range; derate VIN-VOUT delta or output current at ambient temperatures above 60 °C.
Place the input ceramic bypass capacitors (typically 2 x 10 µF X7R 50 V or higher rating) as close as physically possible to the VIN and PGND pins on the same copper layer to minimize the high-di/dt loop area. Keep the SW node trace short and wide to limit radiated EMI, and connect the bootstrap capacitor (typically 0.1 µF X7R) directly between BST and SW with the shortest possible trace. The feedback divider should tap VOUT at the output capacitor's load-side pad, not at the IC pin, to avoid load-regulation errors.
Do not omit the bootstrap capacitor between BST and SW - without it the internal high-side gate drive collapses and the output collapses under load. Do not exceed the BST-to-SW absolute maximum of 7 V; in high-VIN designs verify that VCC (typically derived from an internal regulator or external 5 V bias) does not push BST above 7 V. Do not pull EN high with a slow-rising source - the slow ramp can trigger output overshoot; use the RT/SS capacitor for soft-start and drive EN with a logic-level signal with <1 µs rise time.
Split the ground plane into a quiet analog ground (AGND, FB, COMP, RT/SS return) and a noisy power ground (PGND, input cap return, exposed pad) joined at a single point under the IC exposed pad. This star-ground technique prevents high-side gate drive currents from corrupting the FB reference and causing duty-cycle jitter. Reference the COMP compensation network and FB resistor divider to the analog ground island, not the power ground.
Compliance Information
RoHS and lead-free confirmed via TI product page. Standard grade (non-automotive); choose TPS54361QDPRRQ1 for AEC-Q100 automotive qualification. Halogen-free status not explicitly stated in the provided web sources - set to unknown.
