TS30011-M050QFNR - 1A 5V Sync Buck DC/DC | Semtech | QFN-16
MPN: TS30011-M050QFNR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.5 | $1.50 |
| 10 | $1.35 | $13.50 |
| 100 | $1.15 | $115.00 |
| 500 | $0.98 | $490.00 |
| 1,000 | $0.86 | $860.00 |
| 3,000 | $0.74 | $2,220.00 |
TS30011-M050QFNR Overview
A buck (step-down) DC/DC converter is a switch-mode power supply topology that rapidly switches an input voltage across an inductor to produce a lower, regulated output voltage. Compared with linear regulators, buck converters achieve much higher efficiency (typically >90%) at large VIN-VOUT differentials because they recycle energy through the inductor rather than dissipating it as heat. The TS30011 family (TS30011/12/13) spans 1 A/2 A/3 A current ratings, positioning it for compact, thermally-constrained distributed power architectures.
Key specifications include a fixed 5 V output, 1 A continuous load current, 1 MHz switching frequency (enabling small ceramic output capacitors), and 4.5 V to 24 V input range. The fully integrated power switches eliminate the need for external MOSFETs, while internal compensation removes the external RC network required by many controllers. A Power Good (PG) open-drain output provides supervisory reporting to downstream system components for sequencing and fault handling.
Architecturally, the device uses a peak-current-mode control loop that provides cycle-by-cycle current limiting and simplifies frequency compensation. Synchronous rectification (replacing the external Schottky with an internal low-side FET) reduces conduction loss and improves light-load efficiency, while the high 1 MHz switching frequency shrinks the external LC filter to a few small ceramic capacitors, keeping the total solution footprint under 50 mm^2.
Typical applications include 24 V industrial bus point-of-load regulation, USB-powered 5 V rails, set-top box and home gateway supply rails, and distributed 5 V power in FPGA/CPLD-based systems. The wide 4.5 V-24 V input range supports direct connection to 12 V or 24 V industrial backplanes.
When designing with this device, note that the fixed 5 V output cannot be adjusted. Designers needing 3.3 V, 2.5 V, 1.8 V, or adjustable rails should select the TS30011-M033QFNR, -M025QFNR, -M018QFNR, or -M000QFNR variants instead. The exposed pad must be soldered to a thermal copper pour to keep junction temperature within ratings at full load.
This page synthesizes verified distributor pricing from DigiKey, Mouser, Arrow, LCSC and Newark, cross-references drop-in package-compatible alternatives from the TS30011/12/13 family and competing 1 A synchronous buck converters, and adds practical design notes beyond what is found in the manufacturer datasheet alone.
Drop-in alternatives for TS30011-M050QFNR — 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 TS30011-M050QFNR (same form factor and footprint) — differing in Package, Operating Temperature Range, Switching Frequency, Topology, Control Mode.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
TS30011-M000QFNR
✅ Drop-In✓ In Stock
$1.4 / Unit
View Datasheet →TS30012-M050QFNR
✅ Drop-In📋 Reference alternative (not in catalog)
TS30013-M050QFNR
✅ Drop-In📋 Reference alternative (not in catalog)
TS30011-M033QFNR
✅ Drop-In✓ In Stock
$0.62 / Unit
View Datasheet →TS30011-M018QFNR
✅ Drop-In📋 Reference alternative (not in catalog)
TS30011-M050QFNR Maximum Ratings & Electrical Characteristics
| Topology | Synchronous Buck (Step-Down) |
| Output Type | Fixed |
| Output Voltage | 5 V |
| Output Current | 1 A |
| Input Voltage Range | 4.5 V to 24 V |
| Switching Frequency | 1 MHz (typ) |
| Control Mode | Peak Current-Mode PWM |
| Number of Outputs | 1 |
| Integrated Switches | Yes (high-side and low-side MOSFETs) |
| Internal Compensation | Yes |
| Soft-Start | Yes (internal) |
| Power Good Output | Yes (open-drain) |
| Current Limit | Yes (cycle-by-cycle) |
| Thermal Shutdown | Yes |
| Input UVLO | Yes |
| Package | 16-pin QFN-EP (QFNR), 3x3 mm |
| Mounting Type | Surface Mount |
| Operating Temperature Range | -40C to +125C |
| RoHS Status | Compliant |
| Lead-Free | Yes |
TS30011-M050QFNR Pin Configuration
| Pin 1 | PGND — Power ground return for low-side FET and inductor |
| Pin 2 | VIN — Input supply voltage (4.5 V to 24 V) |
| Pin 3 | VIN — Input supply voltage (tie to PIN 2) |
| Pin 4 | EN — Enable input (active high) |
| Pin 5 | BST — Bootstrap capacitor for high-side gate drive |
| Pin 6 | SW — Switch node (inductor connection) |
| Pin 7 | SW — Switch node (tie to PIN 6) |
| Pin 8 | SW — Switch node (tie to PIN 6) |
| Pin 9 | PGND — Power ground (tie to PIN 1) |
| Pin 10 | PGND — Power ground (tie to PIN 1) |
| Pin 11 | VOUT — Regulated 5 V output sense / capacitor node |
| Pin 12 | FB — Feedback (internal for fixed versions) |
| Pin 13 | COMP — Compensation (internal compensation, leave open) |
| Pin 14 | AGND — Analog ground |
| Pin 15 | PG — Power Good open-drain output |
| Pin 16 | SS — Soft-start (internal, leave open) |
| Pin EP | EP — Exposed thermal pad - solder to ground plane |
Typical Applications
TS30011-M050QFNR is suitable for 7 applications: Industrial 24V Bus Point-of-Load Regulation, USB-Powered 5V Rail for Embedded Systems, Set-Top Box and Home Gateway Power, FPGA/CPLD Auxiliary 5V Supply, Automotive Infotainment Pre-Regulator, IoT Sensor Hub and Smart Home Gateway, Test & Measurement Bench-Top 5V Rail.
Industrial 24V Bus Point-of-Load Regulation
The TS30011-M050QFNR fits industrial 24V bus point-of-load regulation because its 4.5V to 24V input range accepts the 24V industrial backplane directly and produces a clean 5V rail for downstream analog and digital subsystems. The 1MHz switching frequency keeps the LC filter small, while the integrated high-side and low-side MOSFETs eliminate external switch circuitry. At VIN=24V, VOUT=5V, 1A load, efficiency exceeds 90% versus ~21% for an equivalent LDO, which dramatically reduces heatsinking in sealed industrial enclosures. Compared with discrete buck controllers, the TS30011's internal compensation removes the external RC network, simplifying the BOM and reducing PCB area.
Recommended
USB-Powered 5V Rail for Embedded Systems
The TS30011-M050QFNR is well suited for USB-powered 5V rails because the USB 5V VBUS input lies within its 4.5V minimum and produces a tightly regulated 5V output for downstream MCUs and peripherals. Even when the source is a battery or unregulated 5V wall adapter, the buck topology rejects ripple and provides over-current and thermal protection. The PG (open-drain) output signals the host MCU that the rail is stable, allowing safe enumeration and power sequencing of USB stacks. Compared with a USB LDO, the TS30011 generates much less heat at any meaningful load, enabling smaller enclosures without thermal relief.
Recommended
Set-Top Box and Home Gateway Power
The TS30011-M050QFNR suits set-top box and home gateway supplies because it accepts the 12V adapter input and provides an isolated, regulated 5V rail for SoC, DDR and peripheral subsystems. The integrated synchronous MOSFETs achieve >90% efficiency, which keeps wall-plug efficiency high for energy-star compliance and reduces internal enclosure temperature rise. The internal soft-start prevents large inrush currents that would trip adapter foldback protection, while the Power Good output enables graceful SoC power-on sequencing. Compared with a controller-plus-discrete-FET design, the TS30011 shrinks the 5V converter to under 50 mm^2 and removes the compensation network.
Recommended
FPGA/CPLD Auxiliary 5V Supply
The TS30011-M050QFNR is appropriate as an FPGA/CPLD auxiliary 5V supply because many FPGA aux rails (battery backup, configuration, fan drive) require a clean 5V source up to 1A. The 1MHz switching frequency allows placement of the converter near the FPGA without significant EMI coupling, and the exposed pad provides the thermal path needed for sustained 1A output from a small 3x3 mm package. The PG output can be wired to the FPGA's PGOOD input for coordinated power-up, eliminating glitch-induced configuration failures. Compared with a 3A controller, the TS30011 cost-optimizes the aux rail without over-specifying current capability.
Recommended
Automotive Infotainment Pre-Regulator
The TS30011-M050QFNR is applicable as an automotive infotainment pre-regulator because its 4.5V to 24V input range tolerates the cranking and load-dump transients of a 12V automotive bus when paired with a TVS clamp. The 1A output at 5V powers downstream CAN transceivers, audio codecs and small displays with high efficiency, keeping the infotainment enclosure within thermal limits. The internal cycle-by-cycle current limit and thermal shutdown protect against the wiring faults common in vehicle harnesses. Compared with a discrete solution, the TS30011 shrinks the BOM and is footprint-compatible with the TS30011-Q1 automotive grade equivalent if AEC-Q100 is required.
Recommended
IoT Sensor Hub and Smart Home Gateway
The TS30011-M050QFNR supports IoT sensor hub and smart-home gateway designs because its compact 16-pin QFN-EP (3x3 mm) package fits in space-constrained plastic enclosures, while its 1MHz switching permits small ceramic caps that minimize standby quiescent draw. The wide 4.5V to 24V input range allows direct powering from 12V adapters or 24V structured-cable installations used in some smart-home standards. The Power Good output simplifies wake/sleep sequencing of Zigbee, Thread or BLE radios, reducing firmware complexity. Compared with a hot-rail LDO, the TS30011's >90% efficiency keeps wall-plug energy within eco-design limits and reduces heat in always-on devices.
Recommended
Test & Measurement Bench-Top 5V Rail
The TS30011-M050QFNR is a good fit as a bench-top 5V rail in test and measurement instruments because its 4.5V to 24V input range accepts bench supplies up to 24V while delivering a clean 5V output for DUT instrumentation. The 1MHz switching frequency is far above the bandwidth of typical sensor measurements, so output ripple does not appear in measurement data, while the integrated Power Good output can gate the instrument's data acquisition enable line. The internal soft-start prevents large inrush events that could trip sensitive lab supply current limits. Compared with a 3A controller, the TS30011's 1A rating is well-matched to typical bench DUT loads, optimizing BOM cost.
Recommended
Recommended Products Summary
Engineering reference data for TS30011-M050QFNR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TS30011-M000QFNR | TS30012-M050QFNR | TS30013-M050QFNR | TS30011-M033QFNR | TS30011-M018QFNR |
|---|---|---|---|---|---|---|
| Brand | Semtech | Semtech | Semtech | Semtech | Semtech | Semtech |
| Package | 16-pin QFN-EP (3x3 mm) | 16-pin QFN-EP (3x3 mm) - same | 16-pin QFN-EP (3x3 mm) - same | 16-pin QFN-EP (3x3 mm) - same | 16-pin QFN-EP (3x3 mm) - same | 16-pin QFN-EP (3x3 mm) - same |
| Output Voltage | 5 V (fixed) | Adjustable | 5 V (fixed) | 5 V (fixed) | 3.3 V (fixed) | 1.8 V (fixed) |
| Output Current | 1 A | 1 A | 2 A | 3 A | 1 A | 1 A |
| Input Voltage Range | 4.5 V to 24 V | 4.5 V to 24 V | 4.5 V to 24 V | 4.5 V to 24 V | 4.5 V to 24 V | 4.5 V to 24 V |
| Switching Frequency | 1 MHz | 1 MHz | 1 MHz | 1 MHz | 1 MHz | 1 MHz |
| Integrated FETs | Yes (HS + LS) | Yes (HS + LS) | Yes (HS + LS) | Yes (HS + LS) | Yes (HS + LS) | Yes (HS + LS) |
| Power Good Output | Yes | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- Wide 4.5V-24V input range in a 3x3 mm package (vs TS30012-M050QFNR)
- Integrated synchronous MOSFETs eliminate external FETs (vs TS30011-M000QFNR)
- Highest current in fixed-5V QFN-16 family at the same footprint (vs TS30011-M033QFNR)
Design Notes
Solder the exposed thermal pad (EP) to a continuous ground copper pour with at least 6 thermal vias to the opposite PCB layer to keep junction temperature within ratings. Place the input ceramic capacitor (recommend 10 uF X7R) as close as possible to the VIN/PGND pins to minimize switching-node ringing. Keep the SW node copper area small to reduce EMI radiation; the SW trace should be no wider than necessary to carry 1 A continuous current.
Estimated: at VIN=24 V, VOUT=5 V, IOUT=1 A, the TS30011-M050QFNR dissipates approximately (24-5)*1 = 19 W. With a 16-pin QFN-EP (3x3 mm) on a standard JEDEC 4-layer test board (theta_JA approximately 40 C/W), junction temperature rise is approximately 760 C above ambient, which exceeds the 125 C maximum. For sustained 24 V input at 1 A, the TS30013-M050QFNR (3 A) at lower current density or substantial external heatsinking is recommended. At VIN=12 V, VOUT=5 V, IOUT=1 A, dissipation is approximately 7 W and a 1 square-inch copper pour is sufficient.
Do not operate the TS30011-M050QFNR above its 24 V absolute maximum input rating - load-dump transients on automotive 12 V buses can exceed 35 V and must be clamped externally. Do not select the fixed-output variants (-M018/-M025/-M033/-M050) if a different output voltage is needed; use the -M000 adjustable variant instead with an external resistor divider. The BST capacitor (typically 0.1 uF) must be placed close to the BST and SW pins to ensure proper high-side gate drive.
Route the feedback/PGND/AGND traces as a star-ground connection back to a single point near the AGND pin to avoid ground bounce coupling into the feedback loop. Keep the inductor on the same PCB layer as the IC and minimize the SW copper area to reduce radiated EMI. The Power Good pull-up resistor should connect to the output rail (or any rail < 5.5 V) and not exceed 100 kohm to ensure adequate rise time at light load.
Compliance Information
RoHS and lead-free confirmed via Semtech product page and DigiKey listing (5456410). AEC-Q100 qualification not claimed for the standard TS30011-M050QFNR - check the TS30011-MxxxQFNRQ1 suffix for automotive grade. Halogen-free status and conflict-minerals declaration not present in the verified web data and set to unknown.
