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Infineon Technologies TLE6389G501NTMA1
- Part No.:
- TLE6389G501NTMA1
- Manufacturer:
- Infineon Technologies
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TLE6389G501NTMA1.pdf
- Description:
- IC REG BUCK 5V 3A PGDSO-14
- Quantity:
- Payment:
- Shipping:
Inventory:2,024
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Product details
Overview
TLE6389G501NTMA1 from Infineon is a step-down DC/DC switching controller driving an external P-channel MOSFET, delivering fixed 5V output at up to 3A load, operating from 5–48V input, with 100% duty cycle capability and 3% output voltage accuracy in PWM mode. It supports automotive body electronics requiring low dropout, high efficiency (>90%), and robust operation from –40°C to +125°C.
For engineers reviewing the TLE6389G501NTMA1 datasheet, TLE6389G501NTMA1 pinout, TLE6389G501NTMA1 application, or TLE6389G501NTMA1 equivalent, key selection factors include SI_EN/SI_GND dual-ground control logic, current-mode regulation, adjustable reset delay via RD capacitor, and integrated low-battery detection via SI input referenced to 1.25V.
Technical Context
The TLE6389G501NTMA1 implements current-mode PWM/PFM hybrid control with automatic transition between modes to maintain regulation down to 1mA load while limiting quiescent current to ≤110µA at 42V input. Its 100% duty cycle enables ultra-low dropout operation critical for automotive cold-crank scenarios.
It integrates a dedicated SI comparator (1.25V reference), open-drain SO output, and programmable reset delay (RD pin) with internal pull-up on RO - enabling battery monitoring and system-level power sequencing without external comparators or timers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 5 V to 48 V - supports wide automotive battery range including cold-crank transients |
| Output Voltage | Fixed 5 V ±3% - precision trimmed for microcontroller and sensor rail compliance |
| Max Output Current | 3 A - enables direct drive of ECUs, lighting modules, and actuators without external current boosting |
| Quiescent Current | ≤110 µA at 42 V - ensures minimal parasitic drain during vehicle sleep mode |
| Switching Frequency | Up to 350 kHz - allows use of compact surface-mount inductors (e.g., Coilcraft DO3340P-473) |
| Shutdown Current | 2 µA max - meets ISO 16750-2 Class D leakage requirements for always-on domains |
| Operating Temperature | –40°C to +125°C - qualified for under-hood and transmission-control module environments |
Pinout & Package
Packaged in P-DSO-14 (Plastic Dual Small Outline, 14-pin, 150 mil width), thermally enhanced for automotive ambient conditions with exposed pad not electrically connected per datasheet Rev. 1.7.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SI_ENABLE | Active-high SI ground enable | Controls switching of SI_GND to GND; disables SI comparator when low |
| 2 FB | Feedback sense input | Internally tied to 5V divider; monitors regulated output for closed-loop control |
| 3 VOUT | VOUT supply input | Connected to output rail to power internal bias circuitry in fixed-voltage mode |
| 4 GND | Analog ground reference | Primary signal return for FB, CS, and internal regulators |
| 5 SYNC | External clock synchronization input | Accepts 100–350 kHz square wave to align GDRV switching and reduce EMI |
| 6 SI_GND | SI comparator ground reference | Switched to GND only when SI_ENABLE is high; isolates low-battery detection path |
| 7 SI | Low-battery sense input | Compares against internal 1.25V reference; triggers SO when VIN drops below threshold |
| 8 RD | Reset delay timing capacitor | RC time constant sets reset pulse width; 100 nF yields ~100 ms delay |
| 9 SO | Open-drain sense output | Asserts low when SI < 1.25V; pulls up via internal resistor to VS |
| 10 RO | Open-drain reset output | Asserts low after RD delay if FB < 95% nominal; used for MCU brown-out signaling |
| 11 BDS | Buck driver supply | Provides clamped gate-source voltage for P-MOSFET; bypassed with 220 nF ceramic |
| 12 GDRV | Gate drive output | Swings between VS and BDS to fully enhance external P-channel MOSFET (e.g., SPD09P06PL) |
| 13 VS | Main supply input | Primary power input (5–48 V); bypassed with 0.47 µF ceramic near pin |
| 14 CS | Current-sense input | Detects voltage across RSENSE (0.05 Ω typical); trips shutdown at 60 mV threshold |
Key Features
| Feature | Design Value |
|---|---|
| 100% Duty Cycle Operation | Enables regulation down to VS – VOUT < 0.5 V, supporting cold-crank operation to 5.5 V input |
| Integrated Low-Battery Detector | 1.25 V reference + SI/SO pins eliminate need for external voltage monitor IC in body control modules |
| Programmable Reset Delay | Capacitor on RD pin sets precise power-on reset timing (e.g., 100 nF → 100 ms), avoiding race conditions during MCU boot |
| Current-Mode Control | Provides inherent cycle-by-cycle overcurrent protection and stable loop response with minimal external compensation |
| SI_ENABLE-Controlled Ground Path | Isolates SI comparator from noise when disabled, improving reliability in high-EMI engine-bay environments |
Applications
| Body Control Module (BCM) | Engine Control Unit (ECU) Auxiliary Rail |
|---|---|
Use Scenario: Powering LIN transceivers, door lock actuators, and interior lighting drivers from 12 V battery. IC Role / Device Role / Timing Role: Primary 5 V regulator with integrated reset and battery monitoring for fail-safe subsystem control. Use Value: Eliminates discrete supervisor IC and reduces BOM count by integrating reset delay, low-battery flag, and current sensing. | Use Scenario: Generating stable 5 V rail for crankshaft position sensor interface and fuel injector drivers. IC Role / Device Role / Timing Role: High-reliability buck controller tolerant of 5–48 V transients and –40°C to +125°C ambient. Use Value: Maintains regulation during cranking (down to 5.5 V input) and delivers 3 A peak current without thermal derating. |
| Transmission Control Module (TCM) | Advanced Driver Assistance Systems (ADAS) Camera Power |
Use Scenario: Supplying 5 V to solenoid drivers and CAN transceivers in automatic transmission valve bodies. IC Role / Device Role / Timing Role: Regulator with synchronized switching (via SYNC pin) to minimize conducted EMI into sensitive analog sensor paths. Use Value: Enables EMI-compliant layout with predictable 350 kHz switching edge alignment and reduced filter component count. | Use Scenario: Providing clean 5 V power to image sensors and ISP processors in rear-view cameras. IC Role / Device Role / Timing Role: Fixed-output controller with low quiescent current (<110 µA) and fast wake-up from shutdown mode. Use Value: Meets OEM requirements for <10 µA total system standby current by minimizing regulator leakage during vehicle sleep. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down DC/DC controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5164QPWPRQ1 | Wide-input synchronous buck controller (4.5–65 V); requires external high-side MOSFET; no integrated low-battery comparator | Lacks SI/SO/RD functions; needs external supervisor for reset and battery monitoring | Preferred when higher efficiency >95% and synchronous rectification are required, but adds design complexity |
| TPS54360BQDDAQ1 | 4.5–60 V input; 3.5 A output; integrated high-side MOSFET; no SI_ENABLE or SI_GND functionality | No built-in low-battery detection or programmable reset delay; uses standard EN pin only | Selected when board space is constrained and integrated FET simplifies layout, but sacrifices diagnostic features |
Compared with LM5164QPWPRQ1 and TPS54360BQDDAQ1, the TLE6389G501NTMA1 uniquely combines fixed 5 V output, SI-based battery monitoring, and SI_ENABLE-controlled ground isolation - making it optimal for cost-sensitive, function-integrated automotive body electronics where diagnostics and fail-safe behavior are mandatory.
Availability
TLE6389G501NTMA1 is available at Aetrix Electronics and suitable for Body Control Modules, Engine Control Units, and Transmission Control Modules requiring stable component supply across automotive production lifecycles.
Supply support for TLE6389G501NTMA1 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
Infineon Technologies AG is a German semiconductor manufacturer specializing in power management, automotive ICs, and industrial control solutions, with global manufacturing and qualification to AEC-Q100 standards.
The TLE6389 product line targets automotive power conversion applications requiring high reliability, extended temperature operation, and integrated system-level functions such as reset generation and battery monitoring.
FAQ
What is the purpose of the SI_ENABLE and SI_GND pins?
SI_ENABLE controls whether SI_GND is connected to GND (high) or placed in high-impedance (low). When SI_ENABLE is high, the SI comparator operates normally using SI_GND as its reference; when low, SI functionality is disabled to prevent false low-battery triggers during system initialization or fault conditions.
Can TLE6389G501NTMA1 operate with input voltage below 5 V?
No - the absolute minimum operating input voltage is 5 V per datasheet Section 2.0.1. Below this, internal bias circuits cannot sustain regulation, and GDRV will not activate. The 100% duty cycle enables operation down to VS = VOUT + dropout (~5.5 V typical), but startup requires ≥5 V.
How is reset delay time calculated on the RD pin?
Reset delay is determined by the RC time constant formed by the capacitor on RD and an internal 1.2 MΩ pull-down resistor. For example, a 100 nF capacitor yields approximately 120 ms delay (1.2 MΩ × 100 nF), verified in application note AN2001-09.
What external MOSFET is recommended for use with this controller?
The datasheet specifies Infineon SPD09P06PL - a 60 V, 9.5 mΩ P-channel MOSFET optimized for low gate charge and fast turn-off. Its RDS(on) and Qg ensure efficient operation at 350 kHz switching while maintaining thermal margin at 3 A continuous load.
TLE6389G501NTMA1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 5V
- Voltage - Input (Max):
- 60V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 3A
- Frequency - Switching:
- 360kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PG-DSO-14-3
TLE6389G501NTMA1 FAQ
1.How can I place an order for TLE6389G501NTMA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLE6389G501NTMA1 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 TLE6389G501NTMA1 reliable?
The price and inventory of TLE6389G501NTMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLE6389G501NTMA1 is usually 5 days.
3.What payment methods are accepted for TLE6389G501NTMA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLE6389G501NTMA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLE6389G501NTMA1?
TLE6389G501NTMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLE6389G501NTMA1 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 TLE6389G501NTMA1?
For technical support, including TLE6389G501NTMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLE6389G501NTMA1 requirements.
6.How does Aetrix verify that TLE6389G501NTMA1 is sourced from the original manufacturer or authorized distributors?
All TLE6389G501NTMA1 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 TLE6389G501NTMA1 meets industry standards.
7.What is the process for return or replacement of TLE6389G501NTMA1?
All TLE6389G501NTMA1 units undergo pre-shipment inspection (PSI). If there is an issue with TLE6389G501NTMA1, 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 TLE6389G501NTMA1 part is unused and in its original packaging.
Return procedure for TLE6389G501NTMA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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