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NXP Semiconductors PHP45N03LTA,127
- Part No.:
- PHP45N03LTA,127
- Manufacturer:
- NXP Semiconductors
- Category:
- FETs, MOSFETs
- Package:
- TO-220-3
- Datasheet:
-
PHP45N03LTA,127.pdf
- Description:
- MOSFET N-CH 25V 40A TO220AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,698
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Product details
Overview
PHP45N03LTA,127 from NXP Semiconductors (formerly Philips) is an N-channel logic-level TrenchMOS™ power MOSFET in SOT78 (TO-220AB) package, rated for 25 V VDS, 40 A ID (DC at Tmb = 25 °C), and 65 W Ptot. It delivers RDS(on) as low as 13 mΩ at VGS = 10 V and supports fast switching in high-frequency DC–DC converters on computer motherboards.
For engineers reviewing the PHP45N03LTA,127 datasheet, PHP45N03LTA,127 pinout, PHP45N03LTA,127 application, or PHP45N03LTA,127 equivalent, this page provides verified electrical parameters, thermal resistance (Rth(j-mb) = 2.3 K/W), gate charge (Qg(tot) = 19 nC), avalanche energy rating (40 mJ), and mounting-base–referenced derating curves critical for thermal design and layout validation.
Technical Context
This device uses TrenchMOS™ technology to achieve low RDS(on) with logic-level gate drive compatibility down to VGS = 3.5 V (RDS(on) = 22–40 mΩ at 5.2 A). Its gate threshold voltage is tightly specified (1.0–2.0 V at Tj = 25 °C), enabling reliable turn-on with 3.3 V or 5 V controllers.
The source-drain diode has VSD = 0.95–1.2 V at IS = 25 A and supports synchronous rectification. Avalanche ruggedness is characterized at EDS(AL)S = 40 mJ (unclamped inductive load, ID = 20 A, VDD = 15 V), confirming robustness in hard-switched topologies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDS | 25 V maximum drain-source voltage - defines safe blocking capability in ≤24 V rail applications |
| ID (DC) | 40 A at Tmb = 25 °C - continuous current capability with heatsink mounting |
| RDS(on) | 13 mΩ max at VGS = 10 V, ID = 25 A - enables <1.3 W conduction loss at 40 A |
| Qg(tot) | 19 nC typical - determines gate drive power and switching speed in 100–500 kHz converters |
| Rth(j-mb) | 2.3 K/W - junction-to-mounting-base thermal resistance; sets minimum heatsink requirement |
| EDS(AL)S | 40 mJ non-repetitive avalanche energy - validates reliability under inductive turn-off stress |
| VGS(th) | 1.0–2.0 V at ID = 1 mA - ensures full enhancement with standard logic-level drivers |
Pinout & Package
PHP45N03LTA,127 is housed in SOT78 (TO-220AB) plastic package with isolated mounting base electrically connected to drain. The package features three leads and a single mounting hole; thermal performance relies on direct mechanical contact between the mounting base and heatsink.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Gate (G) | Control terminal; requires ≤±20 V drive; 100 nA leakage at ±5 V |
| 2 | Drain (D) | Main power output node; connected internally to mounting base; handles full load current and voltage stress |
| 3 | Source (S) | Power return path; referenced to control ground; carries 40 A DC and 160 A pulsed current |
Key Features
| Feature | Design Value |
|---|---|
| Logic-level gate drive | Operates fully enhanced at VGS = 3.5 V (RDS(on) ≤ 40 mΩ), compatible with 3.3 V microcontrollers and PWM ICs |
| Low RDS(on) × Qg figure of merit | 13 mΩ × 19 nC = 247 mΩ·nC - balances conduction and switching losses in high-frequency buck stages |
| Mounting-base thermal path | Rth(j-mb) = 2.3 K/W enables >30 W dissipation with modest heatsinking - eliminates need for thermal vias or complex PCB copper |
| Robust avalanche rating | 40 mJ unclamped inductive energy handling - supports reliable operation without external snubbers in flyback or forward converters |
| Fast switching transitions | td(on) = 10–20 ns, tr = 60–90 ns - reduces switching losses and EMI generation in 300–500 kHz designs |
Applications
| Computer Motherboard VRM | ATX Power Supply Sync Rectifier |
|---|---|
Use Scenario: High-frequency (300–600 kHz), multiphase buck converter delivering CPU core voltage (0.8–1.5 V) at up to 120 A. IC Role / Device Role / Timing Role: High-side synchronous rectifier MOSFET, driven by dedicated gate driver IC with 5 V logic-level output. Use Value: Low RDS(on) (13 mΩ) minimizes conduction loss at high current; fast switching (tr < 90 ns) reduces dead-time losses and improves efficiency above 90%. |
Use Scenario: Secondary-side synchronous rectification in +12 V ATX main output, replacing Schottky diodes in LLC resonant topology. IC Role / Device Role / Timing Role: Low-side switch in synchronous rectifier stage, controlled by transformer-coupled or opto-isolated timing signal. Use Value: VGS(th) = 1.5 V typical ensures reliable turn-on with minimal gate drive overhead; source-drain diode VSD = 0.95 V supports body-diode conduction during dead time. |
| Industrial DC–DC Module | Embedded System Point-of-Load Regulator |
Use Scenario: Compact 24 V input to 5 V/10 A isolated DC–DC module for PLC I/O modules, operating at 250 kHz with forced-air cooling. IC Role / Device Role / Timing Role: Primary-side switch in active-clamp forward converter, requiring avalanche tolerance during reset. Use Value: 40 mJ avalanche energy rating allows safe operation under worst-case reset transients; Rth(j-mb) = 2.3 K/W simplifies heatsink selection for 25 W dissipation. |
Use Scenario: Non-isolated point-of-load regulator on FPGA carrier board, converting 5 V to 1.2 V @ 20 A with space-constrained layout. IC Role / Device Role / Timing Role: High-current, low-voltage power stage MOSFET in integrated power stage (IPS) or discrete buck stage. Use Value: Logic-level drive (VGS(th) ≤ 2.0 V) enables direct interface with FPGA GPIO or low-voltage PWM controller; TO-220AB package allows manual soldering and field replacement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar N-channel logic-level power MOSFET applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STP45NF3L | RDS(on) = 14 mΩ @ 10 V (vs. 13 mΩ); Qg = 22 nC (vs. 19 nC); same VDS/ID ratings and TO-220AB package | Marginally higher gate drive requirement; identical thermal footprint and pinout | Acceptable alternative where slightly higher switching loss is tolerable and STMicroelectronics supply chain is preferred |
| IRF3710PBF | RDS(on) = 21 mΩ @ 10 V (vs. 13 mΩ); VGS(th) = 2–4 V (vs. 1–2 V); higher threshold limits 3.3 V drive compatibility | Not suitable for direct 3.3 V logic-level drive; requires gate boosting or higher VGS | Only appropriate when gate drive voltage ≥5 V is guaranteed and lower RDS(on) is not required |
Compared with STP45NF3L and IRF3710PBF, PHP45N03LTA,127 offers the lowest RDS(on) and tightest VGS(th) distribution among TO-220AB 25 V logic-level FETs, making it optimal for high-efficiency, low-voltage, high-current synchronous buck stages where gate drive headroom is limited.
Availability
PHP45N03LTA,127 is available at Aetrix Electronics and suitable for computer motherboard VRMs, ATX power supply synchronous rectifiers, and industrial DC–DC modules requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for PHP45N03LTA,127 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
NXP Semiconductors, formerly Philips Semiconductors, is a global leader in high-performance analog and power semiconductors, with expertise in automotive, industrial, and computing applications.
PHP45N03LTA,127 belongs to the TrenchMOS™ logic-level power MOSFET product line, designed specifically for high-efficiency, high-frequency DC–DC conversion in space- and thermally-constrained computing and power supply systems.
FAQ
What is the maximum continuous drain current rating for PHP45N03LTA,127?
The PHP45N03LTA,127 is rated for 40 A DC drain current at mounting base temperature (Tmb) = 25 °C with adequate heatsinking. At Tmb = 100 °C, the derated continuous current drops to 30 A per Figure 2 in the datasheet. This rating assumes proper thermal management via the mounting base.
Does PHP45N03LTA,127 support 3.3 V gate drive?
Yes, PHP45N03LTA,127 is a logic-level MOSFET with VGS(th) = 1.0–2.0 V and RDS(on) = 22–40 mΩ at VGS = 3.5 V and ID = 5.2 A. This confirms full enhancement and usable on-resistance with 3.3 V controllers, though 5 V drive yields optimal RDS(on) = 13–21 mΩ.
What is the thermal resistance from junction to mounting base for PHP45N03LTA,127?
The PHP45N03LTA,127 has a specified Rth(j-mb) of 2.3 K/W (maximum), measured from silicon junction to the metal mounting base. This value is critical for calculating junction temperature rise under load and must be used with heatsink thermal resistance to ensure Tj ≤ 175 °C.
Is PHP45N03LTA,127 suitable for avalanche-prone circuits?
Yes, PHP45N03LTA,127 is characterized for non-repetitive drain-source avalanche energy (EDS(AL)S) of 40 mJ under defined conditions (ID = 20 A, VDD = 15 V, tp = 0.1 ms). This validated ruggedness supports reliable operation in flyback, forward, and active-clamp topologies without external snubbers.
What package type does PHP45N03LTA,127 use and how is pin 2 connected?
PHP45N03LTA,127 uses the SOT78 (TO-220AB) package. Pin 2 is the drain terminal and is internally connected to the mounting base (MB), which must be electrically tied to the drain node in the PCB layout. This configuration provides the primary thermal conduction path to the heatsink.
PHP45N03LTA,127 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- TrenchMOS™
- Package/Case:
- TO-220-3
- Packaging:
- Tube
- Product Status:
- Obsolete
- FET Type:
- N-Channel
- Technology:
- MOSFET (Metal Oxide)
- Drain to Source Voltage (Vdss):
- 25 V
- Current - Continuous Drain (Id) @ 25°C:
- 40A (Tc)
- Drive Voltage (Max Rds On, Min Rds On):
- 3.5V, 10V
- Rds On (Max) @ Id, Vgs:
- 21mOhm @ 25A, 10V
- Vgs(th) (Max) @ Id:
- 2V @ 1mA
- Gate Charge (Qg) (Max) @ Vgs:
- 19 nC @ 5 V
- Vgs (Max):
- ±20V
- Input Capacitance (Ciss) (Max) @ Vds:
- 700 pF @ 25 V
- FET Feature:
- -
- Power Dissipation (Max):
- 65W (Tc)
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220AB
PHP45N03LTA,127 FAQ
1.How can I place an order for PHP45N03LTA,127 through Aetrix?
Please submit a Request for Quotation (RFQ) for PHP45N03LTA,127 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for PHP45N03LTA,127 reliable?
The price and inventory of PHP45N03LTA,127 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PHP45N03LTA,127 is usually 5 days.
3.What payment methods are accepted for PHP45N03LTA,127?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PHP45N03LTA,127 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PHP45N03LTA,127?
PHP45N03LTA,127 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PHP45N03LTA,127 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for PHP45N03LTA,127?
For technical support, including PHP45N03LTA,127 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PHP45N03LTA,127 requirements.
6.How does Aetrix verify that PHP45N03LTA,127 is sourced from the original manufacturer or authorized distributors?
All PHP45N03LTA,127 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that PHP45N03LTA,127 meets industry standards.
7.What is the process for return or replacement of PHP45N03LTA,127?
All PHP45N03LTA,127 units undergo pre-shipment inspection (PSI). If there is an issue with PHP45N03LTA,127, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The PHP45N03LTA,127 part is unused and in its original packaging.
Return procedure for PHP45N03LTA,127:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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