TS30011-M033QFNR - 1A Sync Buck 3.3V 1MHz QFN-16 | Semtech
MPN: TS30011-M033QFNR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.42 | $1.42 |
| 10 | $1.28 | $12.80 |
| 100 | $1.05 | $105.00 |
| 500 | $0.89 | $445.00 |
| 1,000 | $0.76 | $760.00 |
| 3,000 | $0.62 | $1,860.00 |
TS30011-M033QFNR Overview
A buck (step-down) DC/DC converter is a switching power topology that reduces a higher DC rail to a lower regulated DC rail by chopping the input with a switching element and averaging energy through an LC filter. The TS30011 belongs to the synchronous buck family, meaning the rectifier diode is replaced by a second MOSFET to lower conduction loss and raise efficiency. Within the power-management hierarchy, it sits under DC-DC converters -> voltage regulators -> power management ICs -> analog semiconductors.
Key features of the TS30011-M033QFNR include a fixed 3.3 V output (no external feedback resistors required), 1 A continuous load capability, 1 MHz fixed switching frequency that allows small inductors and ceramic output capacitors, and an internal soft-start that limits inrush current at power-up. The device also integrates input under-voltage lockout (UVLO), cycle-by-cycle current limit, thermal shutdown, and a Power Good (PG) open-drain output for system-level sequencing.
The synchronous architecture uses peak current-mode control with internal slope compensation, providing clean loop response and simple external compensation. The exposed thermal pad on the QFN-16 package provides a low thermal-resistance path to PCB copper, enabling continuous 1 A operation across the industrial -40 °C to +125 °C junction temperature range without forced air cooling.
Typical applications include 24 V industrial bus point-of-load regulation, FPGA/CPLD core and I/O rails, microcontroller peripheral supplies, and distributed power architectures in telecom and networking equipment. The fixed 3.3 V output eliminates resistor-divider design effort, while the 1 MHz switching frequency keeps the fundamental ripple well above the AM band and enables a small 1 µH-class inductor.
When designing with the TS30011-M033QFNR, use a 22 µF X5R/X7R ceramic input capacitor and a 22 µF ceramic output capacitor placed within 5 mm of the IC, plus a 1 µH to 4.7 µH shielded inductor rated for at least 1.5 A saturation current. Place the exposed pad on a continuous ground copper pour of at least 1 square inch to keep junction temperature within derating limits.
This page consolidates distributor pricing, parametric alternatives, and engineering design notes that go beyond the manufacturer datasheet, giving procurement and design engineers a single-source decision aid for the TS30011-M033QFNR.
Drop-in alternatives for TS30011-M033QFNR — 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-M033QFNR (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 →TS30011-M025QFNR
✅ Drop-In📋 Reference alternative (not in catalog)
TS30011-M018QFNR
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
TS30011-M050QFNR
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$0.74 / Unit
View Datasheet →TS30111-M000QFNR
✅ Drop-In📋 Reference alternative (not in catalog)
TS30011-M033QFNR Maximum Ratings & Electrical Characteristics
| Topology | Synchronous Buck (Step-Down) |
| Output Type | Fixed |
| Output Voltage | 3.3 V |
| Maximum Output Current | 1 A |
| Input Voltage Range | 4.5 V to 24 V |
| Switching Frequency | 1 MHz (typ) |
| Number of Outputs | 1 |
| Package | 16-VFQFN Exposed Pad (QFN-16) |
| Mounting Type | Surface Mount |
| Operating Temperature Range | -40 °C to +125 °C (junction) |
| Control Mode | Peak Current-Mode PWM |
| Internal MOSFETs | Yes (high-side and low-side) |
| Internal Compensation | Yes |
| Soft-Start | Internal |
| Power Good Output | Yes (open-drain) |
| Protection Features | UVLO, cycle-by-cycle current limit, thermal shutdown |
| RoHS Status | Compliant (per DigiKey listing) |
TS30011-M033QFNR Pin Configuration
| Pin 1 | PGND — Power ground (return for internal low-side FET) |
| Pin 2 | VIN — Input supply voltage (4.5 V to 24 V) |
| Pin 3 | VIN — Input supply voltage (tied to pin 2) |
| Pin 4 | SW — Switch node - connect to output inductor |
| Pin 5 | SW — Switch node - tied to pin 4 |
| Pin 6 | BST — Bootstrap capacitor node for high-side gate drive |
| Pin 7 | AGND — Analog ground |
| Pin 8 | FB — Feedback (fixed-output variants use internal divider) |
| Pin 9 | COMP — Compensation node (internal compensation on this part) |
| Pin 10 | EN — Enable input (active high) |
| Pin 11 | PG — Power Good open-drain output |
| Pin 12 | SS — Soft-start control |
| Pin 13 | RT/NC — Timing resistor / no-connect on fixed-frequency variants |
| Pin 14 | VOUT — Output voltage sense / internal divider top |
| Pin 15 | PGND — Power ground (return path) |
| Pin 16 | PGND — Power ground |
Typical Applications
TS30011-M033QFNR is suitable for 6 applications: Industrial 24 V Bus Point-of-Load Regulation, FPGA / CPLD Core and I/O Rail Supply, Telecom and Networking Equipment, Portable and Battery-Powered Devices, Solid-State Drive (SSD) and Storage Module Power, Test and Measurement Instrumentation.
Industrial 24 V Bus Point-of-Load Regulation
The TS30011-M033QFNR is purpose-built for 24 V industrial bus regulation down to 3.3 V logic rails. With its 4.5 V to 24 V input range and 1 A load capability, it accepts 24 V ±10 % factory bus voltage directly, eliminating an intermediate pre-regulator. The 1 MHz switching frequency lets designers use a small 1 µH inductor, reducing PCB area in PLCs, industrial sensors, and factory-automation I/O modules. Internal UVLO prevents operation below the input undervoltage threshold, protecting downstream 3.3 V MCUs and ASICs during bus brownouts.
Recommended
FPGA / CPLD Core and I/O Rail Supply
The TS30011-M033QFNR supplies 3.3 V rails for FPGA/CPLD auxiliary I/O banks and companion peripheral ICs. With 1 A of continuous current, it can power a small-to-medium FPGA I/O domain plus glue logic, while its fixed 3.3 V output eliminates feedback-divider design. The internal soft-start reduces inrush at power-up, which is critical for FPGA supply sequencing requirements, and the Power Good output can be wired to the FPGA's ENABLE input to gate configuration. The exposed pad provides a low-thermal-resistance path for sustained 1 A loads.
Recommended
Telecom and Networking Equipment
Distributed power architectures in routers, switches, and base stations often need a local 3.3 V rail derived from a 12 V or 24 V backplane. The TS30011-M033QFNR's 4.5 V to 24 V input range covers both bus voltages, while the 1 A output is sufficient for PHY ICs, small FPGAs, and supervisory microcontrollers. The synchronous topology delivers 90 to 95 % peak efficiency at moderate loads, reducing heat in fanless or sealed enclosures. The Power Good flag simplifies fault reporting to the system controller.
Recommended
Portable and Battery-Powered Devices
Although buck converters are typically associated with mains-powered designs, the TS30011-M033QFNR fits portable equipment powered by 1S to 4S Li-ion packs (4.5 V to 16.8 V). The high 1 MHz switching frequency shrinks the inductor and output capacitors, reducing both weight and BOM cost for handheld instruments and IoT edge devices. The 4.5 V minimum input lets the device regulate down to near end-of-pack voltage on a 2S Li-ion (6 V nominal) without dropping out. Synchronous rectification preserves runtime versus a diode-rectified buck.
Recommended
Solid-State Drive (SSD) and Storage Module Power
M.2 and small-form-factor SSDs derive 3.3 V from a host rail that can range from 5 V to 12 V depending on the slot. The TS30011-M033QFNR's 4.5 V to 24 V input range covers both slot variants, and its 1 A output supplies the NAND controller, DRAM, and small housekeeping logic. The exposed-pad QFN-16 footprint fits the tight Z-height of M.2 modules, and the 1 MHz switching frequency stays above audible band to avoid hum. Cycle-by-cycle current limit protects against shorted output traces during PCB assembly.
Recommended
Test and Measurement Instrumentation
Bench-top instruments and data-acquisition modules require clean 3.3 V rails for precision ADCs and DACs. The TS30011-M033QFNR's synchronous topology avoids the switching-noise spikes of older buck converters, and its 1 MHz fundamental falls outside the AM broadcast band, easing CE/FCC EMI compliance. The internal soft-start prevents large inrush currents that could trip bench-supply current limits during instrument power-up. Power Good can be wired to an FPGA or MCU to gate analog calibration until the rail is stable.
Recommended
Recommended Products Summary
Engineering reference data for TS30011-M033QFNR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TS30011-M000QFNR | TS30011-M025QFNR | TS30111-M000QFNR |
|---|---|---|---|---|
| Package | 16-VFQFN Exposed Pad | 16-VFQFN Exposed Pad | 16-VFQFN Exposed Pad | 16-VFQFN Exposed Pad |
| Brand | Semtech | Semtech | Semtech | Semtech |
| Output Voltage | 3.3 V (fixed) | Adjustable (0.9 V min) | 2.5 V (fixed) | Adjustable (0.9 V min) |
| Output Current | 1 A | 1 A | 1 A | 3 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 |
| Switching Frequency | 1 MHz | 1 MHz | 1 MHz | 1 MHz |
| Topology | Synchronous Buck | Synchronous Buck | Synchronous Buck | Synchronous Buck |
| Approx Unit Price (qty 1000) | USD 0.76 | USD 0.78 (est.) | USD 0.78 (est.) | USD 1.05 (est.) |
Key Differentiators
- Fixed 3.3 V output eliminates feedback resistors (vs TS30011-M000QFNR)
- Smaller current rating at lower cost vs 3 A family (vs TS30111-M000QFNR)
- 1 MHz fixed frequency enables small magnetics (vs TS30012-M033QFNR)
Design Notes
Use a 22 µF X5R/X7R ceramic input capacitor and a 22 µF ceramic output capacitor placed within 5 mm of the IC pins. The TS30011-M033QFNR requires a low-impedance input source for stable operation; add a 0.1 µF ceramic bypass capacitor directly at the VIN pin to suppress high-frequency noise from the switching node. The exposed pad must be soldered to a continuous ground copper pour for both electrical ground and thermal dissipation.
Estimated: at VIN = 12 V, VOUT = 3.3 V, IOUT = 1 A, conduction loss dominates and the package dissipates roughly 0.4 W assuming 90 % efficiency. The QFN-16 exposed pad has a thermal resistance of approximately 50 °C/W to a 1-square-inch copper pour, yielding a junction temperature rise of ~20 °C above ambient. This stays within the 125 °C maximum, but for continuous 1 A operation above 70 °C ambient, increase the copper pour area or add airflow to maintain derating margin.
Keep the input capacitor return, output capacitor return, and exposed pad on a single unbroken ground pour to minimize switching-current loop area. Route the SW node trace as short and wide as possible to limit ringing, and place the bootstrap capacitor (BST to SW) within 2 mm of the IC. The feedback trace should be routed away from the SW node to avoid noise coupling; for fixed-output variants the internal divider already mitigates this risk.
Do not exceed 24 V on the input - the absolute maximum is 24 V and transients above this will damage the device. Avoid using electrolytic output capacitors; the TS30011-M033QFNR's control loop is optimized for ceramic output capacitance and may oscillate with high-ESR caps. The EN pin must not be left floating - tie it to VIN through a 100 kΩ resistor for always-on operation, or drive it from a logic signal with a pull-up.
Compliance Information
RoHS compliance and lead-free status per DigiKey listing for TS30011-M033QFNR. AEC-Q100 automotive qualification not applicable - this is an industrial-grade part. REACH, halogen-free, and conflict-minerals declarations were not in the provided data; marked 'unknown'.
