LMZ14203EXTTZX/NOPB - 42V 3A Buck Power Module | Texas Instruments
Teilenummer: LMZ14203EXTTZX/NOPB ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $18.9 | $18,90 |
| 10 | $17.1 | $171,00 |
| 25 | $15.8 | $395,00 |
| 100 | $14.2 | $1.420,00 |
| 1.000 | $12.6 | $12.600,00 |
LMZ14203EXTTZX/NOPB Übersicht
A DC-DC buck (step-down) converter module is a type of switching voltage regulator that converts a higher input voltage to a lower, regulated output voltage using high-frequency switching. Unlike discrete converter designs, the LMZ14203EXT integrates the power MOSFETs, inductor, controller, and compensation network into a single encapsulated power module, collapsing a complex switching regulator design into one surface-mount component within the broader power management IC hierarchy.
Key differentiating features include the wide 42V maximum input voltage for transient-survivable 24V and 28V industrial, avionics, and defense rails; up to 90% conversion efficiency; low radiated emissions with high radiated immunity; and pin-to-pin compatibility with the wider LMZ1420x (2A LMZ14202EXT, 1A LMZ14201EXT), LMZ14203 standard, and LMZ1200x (20V) families, enabling scalable power designs.
The EXT-grade module passes vibration testing per MIL-STD-883 Method 2007.2 Condition A and JESD22-B103B Condition 1, and operates from -55C to +125C - a key advantage over the standard commercial-grade LMZ14203, which is rated only to -40C. The encapsulated TO-PMOD construction also simplifies EMI compliance compared to hand-built discrete layouts.
Typical applications include military and avionics point-of-load power, rugged industrial automation, railway and transportation systems, and defense communications equipment requiring wide-temperature, high-vibration reliability from 24V/28V buses.
Design consideration: the 6V minimum input means the module is unsuited for 5V-only rails; use the LMZ1200x family (20V max, 4.5V minimum) for lower input systems. Validate thermal performance at high VIN-to-VOUT ratios, where conversion losses concentrate.
This page synthesizes distributor availability, pin-to-pin family alternatives, and rugged-application design guidance not found in the manufacturer datasheet alone.
Drop-in-Alternativen für LMZ14203EXTTZX/NOPB – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
LMZ14203EXTTZ/NOPB
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
LMZ14203EXTTZE/NOPB
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
LMZ14202EXTTZX/NOPB
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
LMZ14201EXTTZX/NOPB
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
LMZ14203TZ/NOPB
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
LMZ12003TZ/NOPB
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
LMZ12002TZ/NOPB
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
LMZ14203EXTTZX/NOPB Grenzwerte & elektrische Eigenschaften
| Topologie | Non-Isolated Buck (Step-Down) PoL Module |
| Anzahl der Ausgänge | 1 |
| Eingangsspannungsbereich | 6 V to 42 V |
| Ausgangsspannungsbereich | 0.8 V to 6 V (adjustable) |
| Output Current | 3 A |
| Maximum Total Output Power | 18 W |
| Peak Efficiency | up to 90 % |
| Gehäuse | TO-PMOD-7 (NDW), 10.16 x 13.77 mm, 4.57 mm height |
| Montageart | Leaded Surface Mount |
| Betriebstemperatur | -55C to +125C |
| Vibration Qualification | MIL-STD-883 Method 2007.2 Condition A; JESD22-B103B Condition 1 |
| Radiated Emissions | Low radiated emissions |
| Radiated Immunity | High radiated immunity |
| Family Compatibility | Pin-to-pin with LMZ14203/2/1, LMZ14203EXT/2EXT/1EXT, LMZ12003/2/1 |
| Design Tool Support | WEBENCH Power Designer |
| RoHS-Status | RoHS Compliant (NOPB suffix) |
| Lebenszyklusstatus | Active |
LMZ14203EXTTZX/NOPB Pin-Konfiguration
| Pin 1 | VIN — Input supply voltage, 6V to 42V |
| Pin 2 | EN — Enable input for on/off control |
| Pin 3 | SS — Soft-start / output voltage programming |
| Pin 4 | GND — Ground reference and thermal path |
| Pin 5 | FB — Feedback input for output voltage regulation |
| Pin 6 | GND — Ground reference |
| Pin 7 | VOUT — Regulated output voltage, 0.8V to 6V |
Typische Anwendungen
LMZ14203EXTTZX/NOPB ist geeignet für 6 Anwendungs: Military and Avionics Point-of-Load Power, Rugged Industrial Automation, Railway and Transportation Systems, Defense Communications Equipment, Test and Measurement Instrumentation, Power Supply Distribution and Intermediate Bus Boards.
Military and Avionics Point-of-Load Power
The LMZ14203EXTTZX/NOPB was purpose-built by Texas Instruments for military and rugged point-of-load conversion, combining a 42V maximum input with -55C to +125C operation and MIL-STD-883 Method 2007.2 Condition A vibration qualification. In avionics and defense platforms running 28V buses with MIL-STD-704-style transients, the 42V input ceiling provides surge headroom without external protection stages. The module integrates the MOSFETs, inductor, and compensation into one encapsulated TO-PMOD-7 package, reducing assembly count on conformally coated boards. Low radiated emissions and high radiated immunity ease EMI qualification against platform limits. A typical use converts 28V down to a 5V or 3.3V sensor/DSP rail at up to 3A with up to 90% efficiency, minimizing waste heat in sealed enclosures.
Empfohlen
Rugged Industrial Automation
Factory automation equipment exposed to wide temperature swings, vibration from motors and conveyors, and noisy 24V industrial supplies benefits directly from the LMZ14203EXTTZX/NOPB. Its 6V to 42V input tolerates unregulated 24V rails with surge events up to 42V, while the adjustable 0.8V to 6V output serves FPGAs, microcontrollers, and analog front ends at up to 3A. JESD22-B103B Condition 1 vibration compliance covers mechanical stress in robotic cells and mobile machinery. Because the inductor and power stage are integrated, designers avoid the layout iterations typical of discrete buck designs, shortening time-to-market for ruggedized PLC I/O cards, drives aux supplies, and HMI power inputs. Efficiency up to 90% reduces heatsinking in sealed IP-rated cabinets, and low radiated emissions help meet industrial EMC limits.
Empfohlen
Railway and Transportation Systems
Onboard railway electronics face vibration, shock, wide temperature, and nominal 24V/48V-derived auxiliary supplies - conditions matched to the LMZ14203EXTTZX/NOPB profile. The -55C to +125C operating range covers unconditioned equipment bays, and MIL-STD-883 Method 2007.2 Condition A vibration testing supports deployment on rolling stock where continuous mechanical excitation is present. A 42V input ceiling gives margin on nominal 24V traction auxiliary rails, and the 18W maximum output power comfortably feeds gate drivers, communication modules, and sensing electronics. The TO-PMOD-7 leaded surface-mount construction provides mechanical robustness on the PCB, and the encapsulated module resists humidity and contamination better than open-frame discrete converters, improving long-term reliability in transportation service.
Empfohlen
Defense Communications Equipment
Software-defined radios, tactical networking nodes, and field communication units require clean, compact point-of-load conversion from vehicle or battery-backup 28V rails. The LMZ14203EXTTZX/NOPB's low radiated emissions reduce noise coupling into sensitive RF receiver chains, and its high radiated immunity withstands the hostile electromagnetic environment of defense platforms. With 0.8V to 6V adjustable output at 3A, it powers DSP cores, FPGAs, and RF amplifiers directly. Efficiency up to 90% is critical in battery-operated man-portable and vehicle-mounted systems where every watt of loss becomes thermal load in a sealed enclosure. The single-module construction also shrinks board area versus discrete solutions, an advantage in SWaP-constrained (size, weight, and power) tactical designs.
Empfohlen
Test and Measurement Instrumentation
Bench and modular instruments often front-end unregulated or wide-ranging supply rails; the LMZ14203EXTTZX/NOPB's 6V to 42V input range lets one design cover laboratory, rack, and field variants. The adjustable 0.8V to 6V output at up to 3A (18W) supplies FPGA banks, processor I/O, and analog sections. TI fully enables the LMZ14203EXT in WEBENCH Power Designer, allowing engineers to simulate efficiency, thermal, and BOM trade-offs before prototyping - a meaningful productivity gain in instrumentation development cycles. Low output ripple inherent to the integrated inductor module supports measurement chains where switching noise degrades resolution, and the module's compact TO-PMOD-7 footprint fits dense data-acquisition cards. The EXT temperature rating also suits environmental chamber test equipment.
Empfohlen
Power Supply Distribution and Intermediate Bus Boards
Intermediate bus architectures and backplane power distribution boards use wide-input modules to derive regulated low-voltage rails from a distribution voltage. The LMZ14203EXTTZX/NOPB fits this role where the distribution rail approaches 24V to 36V with transients to 42V, delivering up to 18W per module with up to 90% efficiency. Because the LMZ1420x and LMZ1200x families are pin-to-pin compatible, a single PCB land pattern can be populated with 1A, 2A, or 3A modules (or 20V vs 42V input grades) to right-size cost and current per rail - a documented TI family strategy. The encapsulated TO-PMOD-7 package simplifies design reuse across product variants and supports automated pick-and-place assembly for volume power-board production.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für LMZ14203EXTTZX/NOPB – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | LMZ14203EXTTZ/NOPB | LMZ14202EXTTZX/NOPB | LMZ14201EXTTZX/NOPB | LMZ14203TZ/NOPB | LMZ12003TZ/NOPB |
|---|---|---|---|---|---|---|
| Package | TO-PMOD-7 (10.16 x 13.77 mm) | TO-PMOD-7 - same | TO-PMOD-7 - same | TO-PMOD-7 - same | TO-PMOD-7 - same | TO-PMOD-7 - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Input Voltage Range | 6 V to 42 V | 6 V to 42 V | 6 V to 42 V | 6 V to 42 V | 6 V to 42 V | Up to 20 V |
| Output Current | 3 A | 3 A | 2 A | 1 A | 3 A | 3 A |
| Rugged / Military Qualification | MIL-STD-883 2007.2 Cond. A; JESD22-B103B Cond. 1 | Same EXT qualification | Same EXT qualification | Same EXT qualification | No (commercial grade) | No (commercial grade) |
Wichtigste Unterscheidungsmerkmale
- -55C military temperature rating (vs. LMZ14203TZ/NOPB)
- Highest current in the 42V EXT family (vs. LMZ14202EXTTZX/NOPB)
- Widest input voltage in the pin-compatible family (vs. LMZ12003TZ/NOPB)
- Trade-off: higher cost than commercial grade (vs. LMZ14203TZ/NOPB)
Designhinweise
Estimated: at VIN=42V, VOUT=5V, and full 3A load (15W output) with 90% efficiency, losses are roughly 1.7W inside the module. In sealed enclosures or high ambient, verify junction temperature using the datasheet thermal derating curves for the TO-PMOD-7 package; the encapsulated module dissipates heat primarily through its ground pins and package top. Providing generous copper area on the ground pins and, where available, tie vias to internal ground planes significantly lowers thermal resistance. Re-evaluate at the worst-case low output voltage (0.8V), where duty cycle is smallest and fixed losses weigh heaviest.
Keep the input ceramic capacitor loop as short as possible between VIN (pin 1) and the nearest ground pin to minimize switch-node ringing and conducted EMI; the module's integrated inductor already removes the most sensitive layout element of a discrete buck. Connect both GND pins to a solid ground plane with multiple vias, as they carry both power return and heat. Follow the TI LMZ14203EXT datasheet recommended layout for the FB divider - route the feedback trace away from the switch node and keep it short to prevent regulation instability in high-vibration environments where conformal coating changes stray capacitance.
Do not use this EXT module on input rails below 6V - the minimum input is higher than the commercial LMZ1200x family, and operation below the specified minimum causes dropout and unregulated output. Also confirm transient peaks stay below 42V; 28V avionics and 24V industrial buses can exceed this without input surge protection. When substituting the 2A LMZ14202EXT or 1A LMZ14201EXT for cost savings, verify worst-case current including startup inrush into large capacitive loads, not just steady-state load.
Compliance-Informationen
RoHS compliant per digchip specification data (RoHS compliant, NOPB suffix = no lead-free exemption / lead-free per TI naming convention). Military qualification per MIL-STD-883 Method 2007.2 Condition A and JESD22-B103B Condition 1 per TI product page.
