My Inquiry
My Account
Infineon Technologies TLE6389G50NTMA1
- Part No.:
- TLE6389G50NTMA1
- Manufacturer:
- Infineon Technologies
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TLE6389G50NTMA1.pdf
- Description:
- IC REG BUCK 5V 3A 14DSO
- Quantity:
- Payment:
- Shipping:
Inventory:2,995
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TLE6389G50NTMA1 from Infineon Technologies is a fixed 5V step-down DC/DC controller driving an external P-channel MOSFET, supporting input voltages from 5V to 48V, delivering up to 3A output current with 3% output voltage accuracy in PWM mode, and operating across –40°C to +125°C ambient for automotive power supply applications.
For engineers reviewing the TLE6389G50NTMA1 datasheet, TLE6389G50NTMA1 pinout, TLE6389G50NTMA1 application, or TLE6389G50NTMA1 equivalent, key selection considerations include its 100% duty cycle capability for low-dropout operation, 100µA quiescent current at light load, SI ground switching control, and integrated low-battery detection via SI comparator.
Technical Context
The TLE6389G50NTMA1 implements a current-mode PWM/PFM hybrid control scheme enabling seamless transition between modes without minimum load requirements. Its 100% duty cycle support allows regulation down to VIN – VDS(on) of the external PMOS, critical for automotive cold-crank scenarios where input may dip to 5V.
It integrates dual comparators: one for low-battery detection (SI input vs. 1.25V reference) with open-drain SO output, and another for reset generation (RD capacitor-timed delay feeding RO open-drain output). The SI_EN pin enables high-impedance isolation of SI_GND, decoupling the sense divider from analog ground during disable.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 5 V to 48 V - supports automotive battery range including cold-crank (5V) and load-dump (48V) transients. |
| Output Voltage | Fixed 5 V ±3% - eliminates external feedback resistor network; optimized for microcontroller core/logic rail. |
| Max Output Current | 3 A - determined by external P-MOSFET and inductor; controller provides gate drive (GDRV) and current sensing (CS). |
| Quiescent Current | ≤100 µA - enables always-on systems (e.g., CAN wake-up circuits) without excessive standby drain. |
| Switching Frequency | Up to 350 kHz - allows compact magnetics (e.g., 47 µH DO3340P) and reduces EMI fundamental frequency. |
| Operating Temp | –40°C to +125°C - qualified for under-hood automotive environments per AEC-Q100 stress test profile. |
| Shutdown Current | 2 µA - ensures negligible battery drain when ENABLE is low, critical for long-term parking modes. |
Pinout & Package
Packaged in P-DSO-14 (Plastic Dual Small Outline, 14-pin, 150 mil width), thermally enhanced for automotive power conversion with exposed pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SI_ENABLE) | Control Input | Active-high signal enabling SI_GND connection to GND; disables SI comparator path when low. |
| 2 (FB) | Feedback Sense | Internally tied to 5V reference divider; unused externally for fixed-output version. |
| 3 (VOUT) | Internal Supply Input | Connected to output rail to power internal circuitry; required for stable bias under load. |
| 4 (GND) | Analog Ground | Primary reference for FB, CS, SI, and internal regulators; separate from power ground paths. |
| 5 (SYNC) | External Clock Input | Accepts 100–350 kHz square wave to synchronize GDRV switching and reduce system EMI coupling. |
| 6 (SI_GND) | Switched Sense Ground | Connected to GND only when SI_ENABLE = high; isolates SI divider from noise during shutdown. |
| 7 (SI) | Low-Battery Sense Input | Compares against 1.25 V internal reference; asserts SO when VIN drops below threshold (e.g., 9 V). |
| 8 (RD) | Reset Delay Capacitor | RC time constant sets reset pulse width; 100 nF yields ~100 ms delay before RO deasserts after power rise. |
| 9 (SO) | Open-Drain Sense Output | Active-low signal indicating low-battery condition; pulled up externally for logic-level compatibility. |
| 10 (RO) | Open-Drain Reset Output | Asserts low after power-on delay (set by RD); used to hold MCU in reset until stable 5V is established. |
| 11 (BDS) | Buck Driver Supply | Provides clamped gate-source voltage for P-MOSFET; requires ceramic cap to VS for bootstrap stability. |
| 12 (GDRV) | Gate Drive Output | Swings between VS and BDS to fully enhance external P-channel MOSFET with controlled slew rate. |
| 13 (VS) | Main Supply Input | Primary power input (5–48 V); bypassed with 0.47 µF ceramic capacitor for high-frequency noise suppression. |
| 14 (CS) | Current-Sense Input | Monitors voltage across external sense resistor (e.g., 0.05 Ω); trips shutdown at ~1.2 V threshold. |
Key Features
| Feature | Design Value |
|---|---|
| 100% Duty Cycle Operation | Enables regulation at ultra-low input (e.g., 5.5 V), essential for automotive cold-crank survival without dropout. |
| Integrated Low-Battery Detector | SI/SO path provides programmable undervoltage lockout independent of main regulator output. |
| Adjustable Reset Delay | Capacitor on RD pin sets precise power-good timing (e.g., 10–500 ms), eliminating need for external timers. |
| SI_GND Switching Control | Isolates SI sense divider from GND noise during disable, improving accuracy of battery monitoring in sleep states. |
| Current-Mode PWM/PFM Hybrid | Eliminates minimum load requirement and maintains >90% efficiency from 1 mA to 3 A output current range. |
Applications
| Automotive Body Control Module (BCM) | Infotainment Power Supply |
|---|---|
Use Scenario: Centralized 12V-to-5V conversion powering microcontrollers, CAN transceivers, and sensor interfaces in door modules or lighting controllers. IC Role / Device Role / Timing Role: Primary buck controller providing regulated 5V rail with reset signaling and battery voltage monitoring. Use Value: 100% duty cycle sustains operation during engine cranking (5.5V battery), while SI_EN enables clean sleep-state isolation. | Use Scenario: Stable 5V supply for display controllers and audio DSPs in head units, requiring low-noise, high-reliability regulation. IC Role / Device Role / Timing Role: Fixed-output DC/DC controller with synchronized switching (via SYNC pin) to avoid beat frequencies with display clocks. Use Value: 350 kHz switching allows small 47 µH inductors and low-ESR tantalum output caps, minimizing board area in space-constrained dash designs. |
| Engine Control Unit (ECU) Sub-Rail | Telematics Control Unit (TCU) |
Use Scenario: Secondary 5V rail for non-critical ECU subsystems (e.g., diagnostics, EEPROM, LIN transceivers) fed from main 12V battery. IC Role / Device Role / Timing Role: High-temp-rated controller with integrated RO reset ensuring deterministic boot sequence after ignition-on. Use Value: –40°C to +125°C rating and 2 µA shutdown current meet ASIL-B functional safety support requirements for auxiliary rails. | Use Scenario: Always-on 5V supply for cellular modem and GNSS receiver in vehicle tracking systems requiring low quiescent current. IC Role / Device Role / Timing Role: Step-down controller with <100 µA IQ and SI-based battery monitoring to extend backup runtime during main battery disconnect. Use Value: SI comparator and SO output enable autonomous low-battery alerting without host MCU intervention, reducing wake-up events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM25085MM/NOPB | Adjustable output (0.8–60 V), no integrated low-battery detector or SI_GND switching; requires external feedback resistors. | Lacks dedicated automotive features (SO/RO outputs, wide temp grade); suited for industrial non-automotive use. | Select if output voltage flexibility outweighs automotive qualification needs and system-level battery monitoring is handled elsewhere. |
| TPS54240DGQR | Wider input (3.5–42 V), adjustable output, 2.5 µA shutdown current, but no SI comparator or reset delay tuning. | No built-in reset generator or low-battery flag; requires external supervisor IC for equivalent functionality. | Prefer when higher efficiency at light loads is prioritized over integrated system supervision functions. |
Compared with LM25085MM/NOPB and TPS54240DGQR, the TLE6389G50NTMA1 delivers automotive-specific integration-SI-based battery monitoring, programmable reset delay, and SI_GND switching-in a single AEC-Q100-qualified package, reducing BOM count and layout complexity for body electronics.
Availability
TLE6389G50NTMA1 is available at Aetrix Electronics and suitable for automotive body control modules, infotainment power supplies, and telematics control units requiring stable component supply across extended temperature and long product lifecycles.
Supply support for TLE6389G50NTMA1 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 is a German semiconductor manufacturer specializing in power management, automotive electronics, and industrial control ICs, with global manufacturing and AEC-Q100 qualification infrastructure.
The TLE6389 series belongs to Infineon's automotive power system IC portfolio, designed specifically for robust, integrated DC/DC control in harsh-temperature vehicle subsystems requiring functional safety support and system-level supervision.
FAQ
What is the purpose of the SI_ENABLE pin on the TLE6389G50NTMA1?
The SI_ENABLE pin controls the connection state of the SI_GND terminal. When high, it connects SI_GND to GND via a low-impedance path, enabling accurate low-battery sensing through the SI input. When low, SI_GND enters high-impedance mode, isolating the SI voltage divider from analog ground noise during system sleep or disable states-critical for maintaining measurement integrity in always-on automotive modules.
Can the TLE6389G50NTMA1 be synchronized to an external clock?
Yes, the TLE6389G50NTMA1 supports external synchronization via the SYNC pin (Pin 5). It accepts TTL/CMOS-compatible square-wave signals from 100 kHz to 350 kHz, allowing GDRV switching edges to align with system clocks-reducing beat frequencies and EMI in noise-sensitive applications like infotainment displays or radar subsystems.
How does the reset function work on the TLE6389G50NTMA1?
The reset function uses the RD pin (Pin 8) and RO pin (Pin 10). A capacitor from RD to GND sets the delay time; after VS rises above 5 V, the internal timer begins counting. Once complete, RO (open-drain) pulls low to signal valid 5 V output. RO remains asserted until the delay expires, ensuring microcontrollers receive a clean, timed power-good signal before booting.
What external components are mandatory for basic operation of the TLE6389G50NTMA1?
Mandatory external components include: a P-channel MOSFET (e.g., SPD09P06PL) driven by GDRV, a 47 µH power inductor, input bypass capacitor (0.47 µF on VS), output capacitor (100 µF low-ESR tantalum), current-sense resistor (0.05 Ω between VS and CS), and RD capacitor (e.g., 100 nF) for reset timing. The SI divider (if used) and SYNC termination are optional based on system requirements.
TLE6389G50NTMA1 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-14-1
TLE6389G50NTMA1 FAQ
1.How can I place an order for TLE6389G50NTMA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLE6389G50NTMA1 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 TLE6389G50NTMA1 reliable?
The price and inventory of TLE6389G50NTMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLE6389G50NTMA1 is usually 5 days.
3.What payment methods are accepted for TLE6389G50NTMA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLE6389G50NTMA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLE6389G50NTMA1?
TLE6389G50NTMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLE6389G50NTMA1 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 TLE6389G50NTMA1?
For technical support, including TLE6389G50NTMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLE6389G50NTMA1 requirements.
6.How does Aetrix verify that TLE6389G50NTMA1 is sourced from the original manufacturer or authorized distributors?
All TLE6389G50NTMA1 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 TLE6389G50NTMA1 meets industry standards.
7.What is the process for return or replacement of TLE6389G50NTMA1?
All TLE6389G50NTMA1 units undergo pre-shipment inspection (PSI). If there is an issue with TLE6389G50NTMA1, 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 TLE6389G50NTMA1 part is unused and in its original packaging.
Return procedure for TLE6389G50NTMA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLE6389G50NTMA1 Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
