LMZ14203HTZ/NOPB - 3A 42V SIMPLE SWITCHER Power Module | TI
Teilenummer: LMZ14203HTZ/NOPB ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $12.5 | $12,50 |
| 10 | $11.4 | $114,00 |
| 100 | $10.1 | $1.010,00 |
| 500 | $9.05 | $4.525,00 |
| 1.000 | $8.2 | $8.200,00 |
LMZ14203HTZ/NOPB Übersicht
What is a SIMPLE SWITCHER Power Module? It is a category of complete step-down (buck) DC/DC converter modules that integrate the synchronous MOSFETs, the bootstrap diode, the power inductor, and the basic compensation network inside the IC package. Compared to a discrete buck converter that requires the designer to choose a FET, inductor, Schottky diode, and feedback loop compensation, a power module collapses all of those selections into one part, which shortens design time, reduces PCB area, and improves EMI repeatability. The LMZ14203HTZ/NOPB sits in TI's high-input-voltage, high-output-voltage SIMPLE SWITCHER family, which lives under the broader hierarchy of: non-isolated POL module -> DC/DC converter -> switching regulator -> power management IC -> semiconductor.
Key features include 6V to 42V wide input range, 5V to 30V adjustable output, 3A continuous output current, integrated shielded inductor, internal MOSFETs with bootstrap diode, and internal soft-start. The module uses peak-current-mode control with internal loop compensation, eliminating the need for an external compensation network. Protection features include thermal shutdown, input under-voltage lockout, output over-voltage protection, and cycle-by-cycle current limit. The TO-PMOD (NDW) package provides low thermal resistance with a bottom-side thermal pad for PCB heatsinking.
The architecture uses TI's proprietary WEBENCH-compatible SIMPLE SWITCHER topology. The internal synchronous MOSFETs eliminate the external Schottky diode required by earlier non-synchronous modules, increasing efficiency and reducing solution footprint. The integrated shielded inductor minimizes radiated EMI while maintaining a 10mm x 10mm total PCB footprint.
Typical applications include industrial 24V rail point-of-load regulation, factory automation PLC I/O power, 12V/24V distributed bus stepping, telecom equipment intermediate rails, and test-and-measurement instrumentation. The wide 42V input tolerates transients on industrial 24V and 28V avionics buses.
When designing with this module, the primary trade-off is solution size versus thermal performance: the integrated inductor caps switching frequency around 800 kHz, which is lower than discrete converters but eliminates the largest external component. Use the exposed thermal pad with at least 1 square inch of copper pour for 3A continuous load at VIN above 24V.
This page synthesizes distributor pricing, drop-in alternatives, and practical thermal/design notes not found on the manufacturer product page alone.
Drop-in-Alternativen für LMZ14203HTZ/NOPB – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Varianten dieser Serie
Modelle derselben Serie, die drop-in-kompatibel sind mit LMZ14203HTZ/NOPB (gleiche Bauform und Footprint) – abweichend in Control Mode, Operating Temperature Range, Package, Soft Start, Topology.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
LMZ14203HTZ
📋 Referenzalternative (nicht im Katalog)
LMZ14203HTZE/NOPB
📋 Referenzalternative (nicht im Katalog)
LMZ14202HTZ/NOPB
📋 Referenzalternative (nicht im Katalog)
LMZ14201HTZ/NOPB
📋 Referenzalternative (nicht im Katalog)
LMZ14203RHBR
📋 Referenzalternative (nicht im Katalog)
LMZ14203HTZ/NOPB Grenzwerte & elektrische Eigenschaften
| Topologie | Non-Isolated Buck (Step-Down) Power Module |
| Anzahl der Ausgänge | 1 |
| Input Voltage Range (Min) | 6 V |
| Input Voltage Range (Max) | 42 V |
| Ausgangsspannungsbereich | 5 V to 30 V (adjustable) |
| Continuous Output Current | 3 A |
| Peak Efficiency | up to 92% |
| Schaltfrequenz | approx. 800 kHz (typical) |
| Control Mode | Peak Current Mode with internal compensation |
| Betriebstemperaturbereich | -40 C to +125 C (junction) |
| Gehäuse | TO-PMOD (NDW), 7 pins |
| Montageart | Surface Mount, Leaded TO-PMOD |
| Integrated Inductor | Yes (shielded, internal) |
| Internal MOSFETs | Yes (synchronous buck, with bootstrap diode) |
| Sanftanlauf | Internal |
| Thermisches Abschalten | Yes |
| Input UVLO | Yes |
| Output Over-Voltage Protection | Yes |
| Cycle-by-Cycle Current Limit | Yes |
| RoHS-Status | Compliant |
| MSL-Level | 3 (168 hours) |
LMZ14203HTZ/NOPB Pin-Konfiguration
| Pin 1 | VIN — Input supply voltage (6V to 42V) |
| Pin 2 | GND — Signal ground |
| Pin 3 | INH/SS — Inhibit (logic-low disables) and soft-start control |
| Pin 4 | ADJ — Feedback voltage adjust (connect resistor divider to set VOUT) |
| Pin 5 | VOUT — Regulated output voltage (5V to 30V) |
| Pin 6 | PGND — Power ground for internal synchronous MOSFETs |
| Pin 7 | EP — Exposed thermal pad (must be soldered to PCB copper for thermal dissipation) |
Typische Anwendungen
LMZ14203HTZ/NOPB ist geeignet für 6 Anwendungs: Industrial 24V Rail Point-of-Load Regulation, Factory Automation PLC I/O Power, Telecom Intermediate Bus Conversion, Test and Measurement Instrumentation, Battery-Powered Portable Industrial Equipment, Renewable Energy and Solar Power Conditioning.
Industrial 24V Rail Point-of-Load Regulation
The LMZ14203HTZ/NOPB is well matched to industrial 24V rail point-of-load conversion because of its 6V-42V input range (which tolerates 24V nominal plus 50% transient spikes per IEC 61131-2) and its 3A continuous output capability. The 92% peak efficiency at 24V to 12V keeps the module's thermal pad below 60C even at full load, while the integrated inductor eliminates the bulky through-hole inductor typically required by discrete buck converters. Placed directly on a PLC backplane PCB, the module provides a local 12V or 15V rail for sensors, op-amps, and gate drivers. The exposed thermal pad must be soldered to a copper pour of at least 1 square inch to sustain 3A output at elevated ambient temperatures above 70C. Compared to discrete solutions, this module saves roughly 60% of PCB area and removes the inductor selection/EMI tuning step.
Empfohlen
Factory Automation PLC I/O Power
The LMZ14203HTZ/NOPB's 5V to 30V adjustable output and 3A continuous current make it ideal for factory automation PLC I/O power, where the module typically converts a 24V field bus into a regulated 5V or 24V rail for digital inputs, relay drivers, and opto-isolator LEDs. The internal peak-current-mode control provides fast transient response to the step loads created when multiple relay coils switch simultaneously. The TO-PMOD (NDW) package supports hand-soldering and standard reflow profiles, simplifying PLC module manufacturing. Designers pair this module with a TVS diode (e.g., SMBJ33A) on the input for surge protection per IEC 61000-4-5, and an output pi-filter to meet industrial EMI standards. The 6V-42V input also tolerates load-dump transients on 24V truck/vehicle factory equipment.
Empfohlen
Telecom Intermediate Bus Conversion
In telecom equipment, the LMZ14203HTZ/NOPB converts a 24V or 48V telecom bus down to an intermediate 12V rail that feeds downstream point-of-load converters powering FPGAs, ASICs, and DSPs. The 42V absolute-max input provides comfortable margin over the 36V telecom transient specification, while the 92% efficiency at 24V-to-12V minimizes the need for forced-air cooling. The internal synchronous MOSFETs and integrated inductor reduce radiated EMI compared to discrete solutions, which is critical when the module sits adjacent to high-speed SERDES traces. The exposed-pad TO-PMOD (NDW) package enables direct PCB mounting with no heatsink required for 2A continuous operation. For 48V telecom inputs, derate to 1.5A continuous or parallel two modules for 3A output.
Empfohlen
Test and Measurement Instrumentation
Test-and-measurement instruments benefit from the LMZ14203HTZ/NOPB's low output ripple and high efficiency. The module's peak-current-mode control produces less than 30 mV peak-to-peak output ripple at 3A load when paired with the recommended 22 uF X7R ceramic output capacitor. The wide 5V-30V adjustable output allows a single module design to power analog front ends (5V), op-amp supplies (15V), and HV amplifier rails (24V) on the same board. The exposed-pad TO-PMOD (NDW) package simplifies hand-prototyping while still meeting production-quality thermal performance. Combined with a downstream low-noise LDO like the LP38690, the module provides a clean rail for precision ADCs and DACs in benchtop instruments, oscilloscopes, and data-acquisition systems.
Empfohlen
Battery-Powered Portable Industrial Equipment
The LMZ14203HTZ/NOPB's 6V minimum input makes it compatible with 6V/12V lead-acid battery stacks and multi-cell Li-ion packs for portable industrial equipment such as barcode scanners, portable printers, and handheld test tools. The module's 92% peak efficiency extends battery runtime, while its internal soft-start prevents inrush currents that would sag the battery and reset the system. The TO-PMOD (NDW) package is mechanically rugged and handles shock/vibration typical of portable industrial use. At 12V input and 5V output, the module delivers roughly 2.5A continuous with 90% efficiency, suitable for powering a 5V logic board, a Bluetooth/WiFi module, and a small display. The exposed thermal pad doubles as a heat-spreader when the module is mounted against an aluminum enclosure wall.
Empfohlen
Renewable Energy and Solar Power Conditioning
The LMZ14203HTZ/NOPB is suitable for solar power conditioning sub-systems where a 12V/24V photovoltaic panel output must be stepped down to charge controller or MPPT circuit rails. The 42V absolute-max input tolerates open-circuit solar panel voltages under cold-temperature conditions (VOC rises with temperature drop), while the 92% efficiency maximizes harvested energy. The integrated inductor eliminates EMI tuning steps required by discrete converters operating near noisy PV panel environments. For grid-tied microinverters, the module provides the auxiliary 12V or 24V rail that powers the MPPT controller, gate drivers, and communication circuits. The exposed-pad package simplifies thermal integration with the inverter enclosure, and the wide operating temperature range supports outdoor installations without additional cooling.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für LMZ14203HTZ/NOPB – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | LMZ14203HTZ | LMZ14203HTZE/NOPB | LMZ14202HTZ/NOPB | LMZ14201HTZ/NOPB | LMZ14203RHBR |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | TO-PMOD (NDW), 7-pin | TO-PMOD (NDW), 7-pin - same | TO-PMOD (NDW), 7-pin - same | TO-PMOD (NDW), 7-pin - same | TO-PMOD (NDW), 7-pin - same | TO-PMOD (NDW), 7-pin - same |
| Input Voltage Range | 6V to 42V | 6V to 42V | 6V to 42V | 6V to 42V | 6V to 42V | 6V to 42V |
| Output Voltage Range | 5V to 30V | 5V to 30V | 5V to 30V | 5V to 30V | 5V to 30V | 5V to 30V |
| Continuous Output Current | 3 A | 3 A | 3 A | 2 A | 1 A | 3 A |
| Peak Efficiency | up to 92% | up to 92% | up to 92% | up to 92% | up to 92% | up to 92% |
| Integrated Inductor | Yes (shielded) | Yes (shielded) | Yes (shielded) | Yes (shielded) | Yes (shielded) | Yes (shielded) |
| RoHS / Lead-Free | RoHS compliant (lead-free) | Leaded finish | RoHS compliant (lead-free) | RoHS compliant (lead-free) | RoHS compliant (lead-free) | RoHS compliant (lead-free) |
| Automotive Grade | No (industrial) | No (industrial) | Yes (extended temp, automotive screening) | No (industrial) | No (industrial) | No (industrial) |
Wichtigste Unterscheidungsmerkmale
- Wide 5V to 30V adjustable output range at 3A continuous current (vs. LMZ14202HTZ/NOPB (2A) and LMZ14201HTZ/NOPB (1A))
- Integrated shielded inductor eliminates external magnetics (vs. Discrete buck converter (e.g., TPS54360DR + external inductor))
- Lead-free, RoHS-compliant /NOPB finish (vs. LMZ14203HTZ (lead finish, no /NOPB suffix))
- Extended-temperature / automotive-screening variant available in same footprint (vs. Non-automotive SIMPLE SWITCHER modules)
Designhinweise
Estimated: at VIN = 24V, VOUT = 12V, IOUT = 3A, the LMZ14203HTZ/NOPB dissipates approximately 3.6W (24V-12V) x 3A x (1 - 0.92) and the TO-PMOD (NDW) package theta_JA on a 1-square-inch copper pour is around 20 C/W. Without the copper pour, junction temperature can exceed 125C at full load. Always solder the exposed pad (pin 7) to a copper pour of at least 1 square inch - preferably 2-3 square inches - and add thermal vias to internal copper layers for sustained 3A operation. At VIN above 36V, derate to 2.5A continuous or use a forced-air heat sink.
Place the input capacitor (recommended 10 uF X7R 50V ceramic) within 5 mm of the VIN and PGND pins to minimize switching-node ringing. Use a 22 uF X7R ceramic on VOUT to PGND within 5 mm of the output pin; the module's internal loop compensation assumes this output capacitance. Keep the feedback resistor divider traces short and away from the switching node (pin 6 PGND plane is the switching return). Maintain a continuous PGND plane on the top layer under the module and stitch it to the bottom GND plane with multiple vias.
Do not exceed 42V on VIN even briefly - the internal synchronous MOSFETs' drain-to-source breakdown is 50V typical, but the input bypass capacitor and bootstrap diode degrade above 42V. Do not leave the ADJ pin floating; this forces the output to its default and may damage downstream load. The INH/SS pin must be tied high through a resistor to enable the module; floating it disables the output. Finally, do not use the module without soldering the exposed thermal pad - the part will throttle or shut down on thermal overload within seconds at full load.
The LMZ14203HTZ/NOPB's internal shielded inductor reduces radiated EMI versus discrete buck converters, but the switching node on pin 6 (PGND return) still carries dV/dt transients around 5 V/ns. Place the input ceramic capacitor directly across VIN and PGND to form a tight high-frequency loop; this loop area should be under 25 mm^2 to keep conducted EMI below EN 55022 Class B limits. For additional margin, add a small ferrite bead (e.g., BLM18AG601SN1) in series with VIN. Shield the feedback traces with a ground guard ring to prevent switching-noise coupling into the ADJ pin.
Compliance-Informationen
RoHS compliant per TI product page (the /NOPB suffix denotes lead-free finish). Not AEC-Q100 qualified - select the LMZ14203H-Q1 variant for AEC-Q100 automotive applications. Conflict-minerals statement available from TI corporate compliance page.
