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MagI³C-FDSM Series: Fixed Step-Down Regulator Modules
Würth Elektronik fixed, step-down regulator power module family includes input voltages from 4.75 V to 74.5 V
Würth Elektronik FDSM series are fixed-output, fully integrated DC/DC power supplies. The modules integrate the switching power stage, control circuitry, inductor, and the input and output capacitors. Some higher voltage devices require external input capacitors. No loop compensation is needed, reducing design effort and ensuring fast time to market. The standard SIP-3 THT package is pin-compatible with LM78 linear regulators. The modules meet low noise electromagnetic emission standards (EN 55022/EN 55032 Class B).
Application Notes
- Input Filter for MagI3C Power Modules
- LED Driver with MagI3C Power Module
- ANS007 Designing an Inverting Buck-Boost Converter with MagI³C Power Module
Characteristics and features
- Output current: 0.5 A. 1 A, and 2 A
- Input voltage range: 4.75 V to 74.5 V
- Output voltages: 3.3 V, 5 V, 12 V, and 15 V
- Peak efficiency: up to 93%
- Output ripple: 15 mVpp to 30 mVpp
- Protections: short-circuit, current limit, thermal shutdown, and UVLO
- Low EMI (class B compliant)
- Package: SIP-3, THT, LM78xx-compatible pinout
- Operating temperature range: -40°C to +85°C
- RoHS and REACH compliant
Applications
- 12 V, 24 V, and 48 V rail point-of-load supplies
- Drop-in replacement for LM78xx linear regulators
- MCU, MPU, and interface supplies
- Industrial sensors, motor-drive controls, logistics, and automation
- Servers, telecom, and data systems
FDSM Series MagI³C Power Module
| Image | Manufacturer Part Number | Available Quantity | Price | View Details | |
|---|---|---|---|---|---|
 |  | 173010535 | 2913 - Immediate | $6.46 | View Details |
|  | 173010542 | 671 - Immediate | $16.17 | View Details |
| | 173010578 | 0 - Immediate | $8.63 | View Details |
|  | 173011235 | 511 - Immediate | $5.15 | View Details |
|  | 173011535 | 2730 - Immediate | $3.90 | View Details |
|  | 173950336 | 273 - Immediate | $6.19 | View Details |
| | 173950378 | 94 - Immediate | $6.99 | View Details |
|  | 173950536 | 0 - Immediate | $6.19 | View Details |
| | 173950578 | 1698 - Immediate | $7.25 | View Details |
|  | 173951236 | 523 - Immediate | $3.12 | View Details |
| | 173951536 | 748 - Immediate | $3.12 | View Details |
| | 173010335 | 178 - Immediate | $6.46 | View Details |
| | 173010342 | 94 - Immediate | $15.30 | View Details |
| | 173010378 | 416 - Immediate | $7.74 | View Details |
|  | 173020336 | 33 - Immediate | $7.80 | View Details |
|  | 173020536 | 138 - Immediate | $7.60 | View Details |
|  | 173950375 | 551 - Immediate | $5.15 | View Details |
|  | 173950575 | 543 - Immediate | $5.15 | View Details |
| | 173021236 | 60 - Immediate | $7.80 | View Details |
|  | 173951275 | 652 - Immediate | $5.15 | View Details |
ABC of Power Modules Design Guide
| Image | Manufacturer Part Number | Description | Title | Author(s) | Publisher | Available Quantity | Price | View Details | |
|---|---|---|---|---|---|---|---|---|---|
|  | 744016 | ABC OF POWER MODULES AT APEC | ABC of Power Modules | Steffen Wolf, Ralf Regenhold, Jan Stephan | Würth Elektronik | 0 - Immediate | See Page for Pricing | View Details |
Updated: 2025-09-18
Published: 2016-07-18
