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Infineon Technologies TLE4470G
- Part No.:
- TLE4470G
- Manufacturer:
- Infineon Technologies
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
TLE4470G.pdf
- Description:
- IC REG LINEAR POS ADJ DSO20
- Quantity:
- Payment:
- Shipping:
Inventory:2,366
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Product details
Overview
TLE4470G from Infineon Technologies is a dual low-dropout voltage regulator IC for automotive microprocessor power supply, featuring a 5 V ±2% standby output (Q1, 180 mA), an adjustable main output (Q2, up to 350 mA, tracked to Q1), wide input range (5.6–45 V), and integrated Power-On-Reset with adjustable threshold. It operates across −40 °C to +150 °C and is housed in PG-DSO-20 package.
For engineers reviewing the TLE4470G datasheet, TLE4470G pinout, TLE4470G application, or TLE4470G equivalent, key selection considerations include its dual-output tracking architecture, adjustable reset threshold via RADJ pin, disable-controlled main regulator, early-warning undervoltage sensing (SI), and AEC-Q100 qualification for under-hood automotive use.
Technical Context
The TLE4470G implements two independent LDO regulators: a fixed 5 V standby channel (Q1) and a main channel (Q2) whose output voltage is set externally via ADJ2 and precisely tracks Q1's accuracy (±2%). Its internal PNP pass transistor topology enables very low dropout-typically <0.5 V at full load.
It integrates three supervisory functions: a programmable POR/UVLO reset generator (with external capacitor delay on D pin and adjustable threshold via RADJ), an open-collector sense comparator (SQ) referenced to Q1, and a dedicated sense input (SI) for monitoring external supply rails. All protection features-including short-circuit, overload, and overtemperature-are fully autonomous and require no external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standby Output Voltage | 5 V ±2%; provides stable logic supply for MCU core or CAN transceivers during sleep mode |
| Main Output Current | 350 mA max; sufficient to power peripheral ICs (e.g., ADCs, sensors) while tracking Q1 accuracy |
| Input Voltage Range | 5.6 V to 45 V; supports direct battery connection in 12 V/24 V automotive systems including load dump |
| Quiescent Current (Standby) | 180 µA typical; enables ultra-low-power body electronics operation with DIS asserted |
| Operating Temperature | −40 °C to +150 °C; qualified for engine compartment placement per AEC-Q100 Grade 0 |
| Reset Threshold Adjustment | Externally programmable via RADJ pin; allows precise match to MCU VDD min specification (e.g., 4.25 V) |
| Thermal Resistance (Junction–Ambient) | 100 K/W; measured on 80×80 mm² PCB with 35 µm Cu; defines thermal derating above 125 °C |
Pinout & Package
Package: PG-DSO-20 (20-pin, exposed thermal pad, RoHS-compliant, AEC-Q100 qualified).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RADJ (Pin 1) | Reset threshold adjust input | Connects to voltage divider between Q1 and GND to set custom UVLO trip point; grounded for default 4.65 V threshold |
| D (Pin 2) | Reset delay capacitor node | External capacitor CD sets POR delay time; 100 nF yields ~100 ms delay |
| DIS (Pin 3) | Main regulator disable control | High-level signal disables Q2 output, reducing total current draw to 180 µA |
| GND (Pins 4–7, 14–17) | Power and signal ground | Eight dedicated ground pins minimize IR drop and improve noise immunity in high-current switching |
| RQ (Pin 8) | Open-collector reset output | Pulled low when VQ1 drops below threshold; internal 30 kΩ pull-up to Q1 enables direct MCU reset assertion |
| SQ (Pin 9) | Open-collector sense output | Asserted low when SI voltage falls below Q1; used for auxiliary supply monitoring without external comparator |
| Q1 (Pin 10) | Standby regulator output | 5 V ±2% source for MCU core or real-time clock; requires ≥6 µF low-ESR ceramic capacitor |
| ADJ2 (Pin 11) | Main regulator feedback adjust | Connects to resistor divider from Q2 to GND; sets VQ2 ≥5 V while maintaining tracking to Q1 accuracy |
| Q2 (Pins 12–13) | Main regulator output | Dual-pin configuration supports higher current delivery; requires ≥10 µF low-ESR ceramic capacitor |
| I2 (Pin 18) | Main regulator input | Direct connection to battery or pre-regulated rail; bypassed with ceramic capacitor at IC pin |
| I1 (Pin 19) | Standby regulator input | Shared or separate input from I2; decoupled locally with ceramic capacitor |
| SI (Pin 20) | Sense comparator input | Monitors external supply (e.g., LIN bus or sensor rail); triggers SQ when voltage falls below VQ1 |
Key Features
| Feature | Design Value |
|---|---|
| Dual-output tracking regulation | Q2 voltage follows Q1 within ±2% tolerance-enables synchronized power sequencing for multi-rail MCUs |
| Adjustable reset threshold | RADJ pin allows setting UVLO trip point from 3.5 V to 5.5 V, matching diverse MCU VDDmin requirements |
| Integrated early-warning comparator | SQ output signals supply degradation before RQ asserts, enabling graceful firmware shutdown or error logging |
| Disable-controlled main regulator | DIS pin reduces system quiescent current by >99% during sleep-critical for ISO 8859-3 compliant body modules |
| AEC-Q100 Grade 0 qualification | Validated for 150 °C junction operation-supports placement near engines, transmissions, or power inverters |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
Use Scenario: Powers 32-bit MCU, CAN controller, and analog front-end in gasoline/diesel ECU under transient battery conditions (load dump, cold crank). IC Role / Device Role / Timing Role: Dual LDO supplies isolated 5 V rails; reset generator ensures deterministic boot after ignition-on; SI monitors 12 V rail for limp-home detection. Use Value: Tracks Q1/Q2 within ±2% to prevent timing skew between CPU and peripherals; withstands 45 V transients without external TVS. | Use Scenario: Supplies door module MCU, LIN transceiver, and window motor driver in zero-power sleep state with <200 µA total draw. IC Role / Device Role / Timing Role: Standby regulator powers RTC and wake-up logic; DIS pin shuts down main rail during sleep; RQ resets MCU on battery brownout. Use Value: 180 µA quiescent current meets OEM parasitic drain limits; PG-DSO-20 thermal pad enables conduction cooling on metal-core PCB. |
| Advanced Driver Assistance System (ADAS) Camera ECU | Electric Power Steering (EPS) Control Unit |
Use Scenario: Provides clean 5 V for image sensor, ISP, and SerDes interface in rear-view camera exposed to under-hood temperature extremes. IC Role / Device Role / Timing Role: Q1 powers sensor bias and PLL; Q2 supplies ISP core; SQ monitors 3.3 V LDO output for cascaded fault detection. Use Value: −40 °C to +150 °C operation avoids derating; low dropout (<0.4 V at 150 mA) maintains regulation during cold-crank (6.5 V battery). | Use Scenario: Supplies torque controller MCU and gate drivers in EPS unit mounted adjacent to electric motor housing. IC Role / Device Role / Timing Role: Standby rail powers safety monitor ASIC; main rail drives motor control logic; overtemperature protection halts Q2 if heatsink exceeds 140 °C. Use Value: Integrated overtemperature shutdown prevents thermal runaway without external sensor; 350 mA Q2 supports dual-core MCU with CAN FD and PWM timers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output automotive LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV70733PDPKR | Single 3.3 V output, 300 mA, no reset or sense functions, SOT-23-5 package | Lacks dual-rail tracking, reset supervision, and automotive temp rating (−40 °C to +125 °C only) | Select only for non-safety, non-automotive cost-sensitive applications requiring minimal footprint |
| MAX16910ATP+ | Dual output (5 V/3.3 V), 250 mA each, integrated watchdog, TQFN-20 package, −40 °C to +125 °C | No adjustable reset threshold; SI/SQ functions absent; lower max input (28 V) | Prefer where watchdog timer is required and input voltage stays below 28 V; not suitable for 45 V load dump |
Compared with TLV70733PDPKR and MAX16910ATP+, the TLE4470G uniquely combines AEC-Q100 Grade 0 rating, 45 V input tolerance, adjustable reset threshold, and dual-output tracking-making it the only option qualified for critical engine bay power domains requiring guaranteed reset behavior across full automotive temperature and voltage extremes.
Availability
TLE4470G is available at Aetrix Electronics and suitable for Engine Control Units, Body Control Modules, ADAS Camera ECUs, and Electric Power Steering Control Units requiring stable component supply across extended temperature and voltage ranges.
Supply support for TLE4470G 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 security solutions, with global manufacturing and automotive qualification infrastructure.
The TLE4470G belongs to Infineon's TLE automotive power system IC family, designed specifically to replace discrete LDO + supervisor combinations in engine, chassis, and body electronics with single-chip robustness and AEC-Q100 compliance.
FAQ
What is the function of the RADJ pin on the TLE4470G?
The RADJ pin (Pin 1) allows external adjustment of the reset switching threshold voltage. By connecting a resistor divider between Q1 and GND to this pin, designers can set the UVLO trip point anywhere from approximately 3.5 V to 5.5 V. When left unconnected or tied to GND, the device defaults to its internal 4.65 V threshold. This feature ensures compatibility with MCUs having varying VDD minimum specifications.
Can the TLE4470G be used with a single input supply for both regulators?
Yes-the TLE4470G supports shared input operation. Pins I1 (Pin 19) and I2 (Pin 18) may be connected to the same battery rail. The datasheet confirms that both regulators function correctly with common input, provided local ceramic decoupling capacitors are placed directly at each input pin. This simplifies PCB layout in space-constrained automotive modules.
How does the ADJ2 pin enable adjustable main output voltage?
The ADJ2 pin (Pin 11) serves as the feedback node for the main regulator. An external resistor divider from Q2 output to GND sets the voltage at ADJ2 equal to VQ1 (5 V). The internal error amplifier compares ADJ2 to VQ1 and adjusts Q2's PNP pass transistor to maintain that ratio-enabling VQ2 = VQ1 × (1 + R1/R2), where R1 and R2 form the divider. Minimum VQ2 is 5 V; higher values are supported.
Is the TLE4470G pin-compatible with the TLE4470GS (PG-DSO-14)?
No-TLE4470G (PG-DSO-20) and TLE4470GS (PG-DSO-14) are not pin-compatible. The PG-DSO-20 version adds RADJ and separates I1/I2 inputs, while the PG-DSO-14 uses a single I pin and lacks adjustable reset threshold. Pin counts, functions, and physical footprints differ. Migration requires PCB redesign and validation of reset timing, thermal performance, and output tracking behavior.
TLE4470G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- OPTIREG™
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Adjustable (Fixed)
- Number of Regulators:
- 2
- Voltage - Input (Max):
- 45V
- Voltage - Output (Min/Fixed):
- 5V, (5V), Tracking
- Voltage - Output (Max):
- 20V
- Voltage Dropout (Max):
- 0.5V @ 100mA, 0.6V @ 200mA
- Current - Output:
- 180mA, 350mA
- Current - Quiescent (Iq):
- 500 µA
- Current - Supply (Max):
- 15 mA
- PSRR:
- 60dB (20Hz ~ 20kHz)
- Control Features:
- Enable, Reset
- Protection Features:
- Over Current, Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PG-DSO-20-6
TLE4470G FAQ
1.How can I place an order for TLE4470G through Aetrix?
Please submit a Request for Quotation (RFQ) for TLE4470G 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 TLE4470G reliable?
The price and inventory of TLE4470G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLE4470G is usually 5 days.
3.What payment methods are accepted for TLE4470G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLE4470G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLE4470G?
TLE4470G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLE4470G 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 TLE4470G?
For technical support, including TLE4470G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLE4470G requirements.
6.How does Aetrix verify that TLE4470G is sourced from the original manufacturer or authorized distributors?
All TLE4470G 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 TLE4470G meets industry standards.
7.What is the process for return or replacement of TLE4470G?
All TLE4470G units undergo pre-shipment inspection (PSI). If there is an issue with TLE4470G, 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 TLE4470G part is unused and in its original packaging.
Return procedure for TLE4470G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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