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Infineon Technologies TLE6389GV
- Part No.:
- TLE6389GV
- Manufacturer:
- Infineon Technologies
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TLE6389GV.pdf
- Description:
- IC REG BUCK ADJ 3A PGDSO-14
- Quantity:
- Payment:
- Shipping:
Inventory:1,317
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Product details
Overview
TLE6389GV from Infineon Technologies is a step-down DC/DC switching controller driving an external P-channel MOSFET, supporting 5V–48V input and adjustable output voltage up to 3A load. It features 100% duty cycle operation for ultra-low dropout, 350kHz max switching frequency, and 100µA quiescent current in light-load PWM/PFM mode. Used in automotive body electronics for stable 5V/3.3V rail generation from battery-supplied systems.
For engineers reviewing the TLE6389GV datasheet, TLE6389GV pinout, TLE6389GV application, or TLE6389GV equivalent, key selection criteria include its adjustable-output configuration (vs fixed 5V/3.3V variants), SI_GND/SI_ENABLE functionality, current-mode control architecture, and -40°C to +125°C ambient operation range for under-hood deployment.
Technical Context
The TLE6389GV implements a current-mode PWM/PFM hybrid control scheme with automatic mode transition, enabling seamless operation from full load to microamp-level quiescent current without minimum load requirements. Its 100% duty-cycle capability supports VIN-to-VOUT dropout as low as 0.3V at 3A, critical for cold-crank automotive conditions.
It integrates a low-battery detector (SI comparator referenced to 1.25V), open-drain reset output (RO) with programmable delay via RD capacitor, and synchronous switching support via SYNC pin. The GDRV output swings between VS and BDS to drive high-side P-MOSFETs with clamped gate-source voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 5 V to 48 V - Supports wide automotive battery range including cold-crank (6V) and load-dump (42V) transients. |
| Output Current | Up to 3 A - Delivers sufficient power for microcontroller, sensor, and CAN transceiver rails in body control modules. |
| Quiescent Current | 100 µA - Enables always-on subsystems (e.g., door module wake-up logic) without excessive battery drain. |
| Switching Frequency | Up to 350 kHz - Allows use of compact surface-mount inductors (e.g., Coilcraft DO3340P-473) and reduces EMI filtering burden. |
| Output Accuracy | ±3 % in PWM mode - Ensures reliable operation of 3.3V/5V digital ICs without post-regulation. |
| Operating Temperature | -40 °C to +125 °C - Qualified for under-hood and passenger compartment placement per AEC-Q100 stress requirements. |
| Shutdown Current | 2 µA - Meets automotive sleep-mode current budgets for ECU retention power. |
Pinout & Package
P-DSO-14 package: 14-pin plastic dual small-outline, exposed thermal pad (not electrically connected), RoHS-compliant, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SI_ENABLE) | Control Input | Active-high enable for SI_GND switching; connects SI_GND to GND when high, places SO in high-Z when low. |
| 2 (FB) | Feedback Sense | Resistor-divider input for adjustable output; internally tied to reference for fixed-output variants. |
| 3 (VOUT) | Internal Supply Input | Connected to output node to power internal circuitry; required for variable-output configuration. |
| 4 (GND) | Analog Ground | Primary reference for FB, CS, SI, and internal regulators; must be star-connected to minimize noise coupling. |
| 5 (SYNC) | External Clock Input | Accepts 100–350 kHz square wave to synchronize GDRV switching and reduce system-wide EMI peaks. |
| 6 (SI_GND) | Comparator Reference Ground | Switched ground for SI resistor divider; enables low-battery detection independent of main GND path. |
| 7 (SI) | Low-Battery Sense Input | Compares VIN-derived voltage against 1.25 V internal reference; triggers SO when below threshold. |
| 8 (RD) | Reset Delay Timing | Capacitor-to-ground sets RO assertion delay (e.g., 100 nF ≈ 100 ms) for power-rail sequencing. |
| 9 (SO) | Low-Battery Alert Output | Open-drain output pulled up externally; signals undervoltage condition to MCU or watchdog circuit. |
| 10 (RO) | Power-On Reset Output | Open-drain reset signal with internal pull-up; asserts after programmable delay once VOUT stabilizes. |
| 11 (BDS) | Buck Driver Supply | Provides clamped gate-drive supply (VS − 6.8 V max) for P-MOSFET gate-source voltage control. |
| 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); requires 0.47 µF ceramic bypass to GND close to pin. |
| 14 (CS) | Current Sense Input | Monitors voltage across external sense resistor (e.g., 50 mΩ) to limit peak switch current and protect MOSFET. |
Key Features
| Feature | Design Value |
|---|---|
| 100% Duty Cycle Operation | Enables dropout voltage as low as 0.3 V at 3 A, sustaining regulated output during automotive cold-crank (6 V battery). |
| Integrated Low-Battery Detector | SI/SI_GND/SO circuitry provides standalone undervoltage monitoring without external comparators or reference. |
| Programmable Reset Delay | RD capacitor sets precise power-good timing (e.g., 10–500 ms), enabling safe MCU boot sequencing after rail stabilization. |
| Current-Mode Control | Provides inherent cycle-by-cycle current limiting, fast transient response, and stable operation with ceramic output capacitors. |
| Sync Capability | SYNC pin allows alignment of switching edges across multiple TLE6389GVs or with system clock, reducing conducted EMI peaks. |
Applications
| Body Control Module (BCM) | Door Control Unit (DCU) |
|---|---|
Use Scenario: Powering 3.3V microcontroller, LIN transceivers, and window motor drivers from 12V battery with cold-crank resilience. IC Role / Device Role / Timing Role: Primary step-down controller generating stable 3.3V/5V rails; provides RO reset signal for MCU initialization and SO low-battery alert. Use Value: Eliminates need for external reset IC and voltage monitor; 100% duty cycle maintains regulation down to 6.5V input during cranking. | Use Scenario: Compact power supply for mirror adjustment, lock actuator, and proximity sensor in space-constrained door cavity. IC Role / Device Role / Timing Role: Adjustable-output DC/DC controller driving SPD09P06PL P-MOSFET; SI_ENABLE enables isolated power domain control. Use Value: SI_GND switching isolates low-battery sensing from noisy motor return paths, improving detection accuracy. |
| Seat Control Module | Roof Module (Sunroof/Blind) |
Use Scenario: Dual-rail supply (5V for MCU, 3.3V for sensors) in seat ECU with wake-on-LIN capability and low sleep current. IC Role / Device Role / Timing Role: Configured for adjustable output with external feedback divider; RO ensures clean MCU reset on power-up. Use Value: 100 µA quiescent current meets OEM <150 µA sleep budget; SYNC input aligns switching with LIN bus timing to suppress interference. | Use Scenario: Powering sunroof motor driver IC and position sensor in high-temperature roof environment. IC Role / Device Role / Timing Role: High-temp rated controller (−40°C to +125°C) driving external MOSFET; CS pin enables overcurrent protection for motor stall events. Use Value: CS-based current limiting prevents thermal runaway during jammed sunroof conditions without external sense amplifier. |
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 buck controller (4.5–65 V), but uses N-MOSFET high-side drive and requires bootstrap circuit; no integrated low-battery detector. | Designed for higher VIN ranges and higher efficiency at >1A, but lacks SI/SO functionality for automotive undervoltage monitoring. | Select when higher input voltage margin (>48 V) or N-MOSFET cost advantage is prioritized over integrated diagnostics. |
| TPS54240DGQR | Adjustable buck controller (3.5–42 V), 2.5A max, no SI/SO pins, no 100% duty cycle, higher IQ (145 µA typical). | Suitable for non-automotive industrial 12V/24V systems where cold-crank operation and battery monitoring are not required. | Choose for cost-sensitive 24V embedded systems lacking AEC-Q100 requirements and diagnostic needs. |
Compared with LM5164QPWPRQ1 and TPS54240DGQR, the TLE6389GV uniquely integrates automotive-grade low-battery detection, 100% duty cycle for cold-crank, and SI_GND isolation-making it purpose-built for body electronics where functional safety and battery-state awareness are mandatory.
Availability
TLE6389GV is available at Aetrix Electronics and suitable for automotive body control modules, door control units, seat control systems, and roof modules requiring stable component supply across extended temperature and voltage ranges.
Supply support for TLE6389GV 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 ICs, and industrial control solutions, with global manufacturing and AEC-Q100 qualification infrastructure.
The TLE6389 product line delivers highly integrated, AEC-Q100-qualified DC/DC controllers for automotive body electronics, emphasizing cold-crank resilience, diagnostic integration, and system-level power sequencing.
FAQ
What is the function of the SI_ENABLE and SI_GND pins on the TLE6389GV?
SI_ENABLE is an active-high control input that switches SI_GND between high-impedance and GND connection. When SI_ENABLE is high, SI_GND is tied to GND, enabling the SI comparator to monitor battery voltage via an external resistor divider. When low, SI_GND floats and SO is undefined-allowing isolation of low-battery sensing from noisy ground returns in multi-load systems.
Can the TLE6389GV operate with a 60V input?
No-the absolute maximum VS rating is 60V, but the recommended operating range is 5V to 48V per datasheet Section 2.0.1. Sustained operation above 48V risks exceeding thermal limits and violates AEC-Q100 stress conditions; transient spikes up to 60V are tolerated only for ≤200 ms per ISO 7637-2 Pulse 5a.
How is output voltage adjusted on the TLE6389GV?
Output voltage is set using a resistor divider from VOUT to GND, connected to FB (Pin 2). The internal reference is 2.5V, so VOUT = 2.5 × (1 + R1/R2). For example, R1 = 400 kΩ and R2 = 100 kΩ yields 12.5V output. VOUT (Pin 3) must be connected to the regulated output node to power internal circuitry.
Does the TLE6389GV require an external bootstrap capacitor for gate drive?
No-it uses a charge-pump-based BDS supply (Pin 11) referenced to VS, eliminating the need for a bootstrap capacitor. A ceramic capacitor (e.g., 100 nF) between BDS and VS generates the clamped gate-source voltage needed to fully enhance the external P-channel MOSFET, simplifying layout and improving reliability in high-vibration environments.
TLE6389GV 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:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 5V
- Voltage - Input (Max):
- 60V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- 15V
- 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
TLE6389GV FAQ
1.How can I place an order for TLE6389GV through Aetrix?
Please submit a Request for Quotation (RFQ) for TLE6389GV 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 TLE6389GV reliable?
The price and inventory of TLE6389GV are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLE6389GV is usually 5 days.
3.What payment methods are accepted for TLE6389GV?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLE6389GV transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLE6389GV?
TLE6389GV orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLE6389GV 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 TLE6389GV?
For technical support, including TLE6389GV datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLE6389GV requirements.
6.How does Aetrix verify that TLE6389GV is sourced from the original manufacturer or authorized distributors?
All TLE6389GV 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 TLE6389GV meets industry standards.
7.What is the process for return or replacement of TLE6389GV?
All TLE6389GV units undergo pre-shipment inspection (PSI). If there is an issue with TLE6389GV, 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 TLE6389GV part is unused and in its original packaging.
Return procedure for TLE6389GV:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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