TLE4476DATMA1 - Dual 3.3V/5V 350/430mA LDO Regulator | Infineon
MPN: TLE4476DATMA1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.49 | $3.49 |
| 10 | $3.2 | $32.00 |
| 100 | $2.85 | $285.00 |
| 500 | $2.5 | $1,250.00 |
| 1,000 | $2.2 | $2,200.00 |
| 2,500 | $1.95 | $4,875.00 |
Drop-in alternatives for TLE4476DATMA1 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
TLE42764DVATMA1
✅ Drop-In✓ In Stock
$0.74 / Unit
View Datasheet →TLE42744DV33ATMA1
✅ Drop-In✓ In Stock
$0.74 / Unit
View Datasheet →TLF80511EJV33XUMA1
✅ Drop-In✓ In Stock
$0.65 / Unit
View Datasheet →TLE4476DATMA1 Maximum Ratings & Electrical Characteristics
| Topology | Dual LDO Linear Regulator |
| Output 1 Voltage (Q1) | 3.3 V fixed |
| Output 1 Current (Q1) | 350 mA |
| Output 2 Voltage (Q2) | 5.0 V fixed |
| Output 2 Current (Q2) | 430 mA |
| Number of Outputs | 2 |
| Package | PG-TO252-5-11 (TO-252, DPAK 4+Tab) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +150C (TJ) |
| Automotive Qualified | Yes (Infineon OPTIREG family) |
| RoHS Status | Compliant |
| Protection Features | Over-temperature shutdown, short-circuit current limit (per datasheet) |
TLE4476DATMA1 Pin Configuration
| Pin 1 | IN — Unregulated input supply voltage |
| Pin 2 | Q2 (5V) — 5.0 V regulated output, up to 430 mA |
| Pin 3 | GND — Ground |
| Pin 4 | Q1 (3.3V) — 3.3 V regulated output, up to 350 mA |
| Pin 5 | TAB — Exposed thermal tab / substrate (must be soldered to PCB copper for thermal dissipation) |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
TLE4476DATMA1 is suitable for 7 applications: Automotive Body and Chassis ECU, Industrial PLC and Sensor Interface Module, Infotainment Head Unit Auxiliary Supply, HVAC and Climate Control Module, Body Control Module (BCM) Peripheral Power, Generic 12V Battery-Powered MCU Board, Lighting and LED Driver Module Auxiliary Supply.
Automotive Body and Chassis ECU
The TLE4476DATMA1's dual 3.3 V / 5 V output rails match the canonical automotive ECU power tree: 5 V for CAN transceivers (e.g., TLE7250 family) and sensor signal conditioning, 3.3 V for the microcontroller core, EEPROM, and LIN slave logic. With 350 mA on the 3.3 V rail and 430 mA on the 5 V rail, it easily powers mid-range 32-bit microcontrollers such as Aurix TC2xx entry-level variants plus a CAN transceiver plus a few sensors. The OPTIREG family qualification and -40C to +150C junction rating support under-hood and body-module thermal environments, while the integrated over-temperature and short-circuit protection allow the regulator to survive load-dump transients and harness shorts common in 12 V automotive systems.
Recommended
Industrial PLC and Sensor Interface Module
In industrial PLC analog-input modules and 24 V sensor interface boards, the TLE4476DATMA1 provides both the 5 V supply for analog front-end op-amps and 4-20 mA loop interfaces and the 3.3 V supply for an ADC or microcontroller, all from a single 24 V (post-bulk) rail. The 350 mA / 430 mA budget is sufficient for a 4-channel analog input card with one ADC and several op-amps. Compared to a discrete two-LDO solution, the TLE4476DATMA1 reduces PCB footprint by combining both regulators into one DPAK 4+Tab package and eliminating one enable/reset network.
Recommended
Infotainment Head Unit Auxiliary Supply
Automotive infotainment head units require multiple low-voltage rails: 5 V for USB charging controllers, audio CODECs, and legacy logic; 3.3 V for the Bluetooth/Wi-Fi module, MCU, and SD-card logic. The TLE4476DATMA1 supplies both rails from a single post-buck 8 V intermediate rail, simplifying power-tree design and reducing EMI-coupling paths by colocating both LDOs in one thermally efficient DPAK 4+Tab package. The OPTIREG family's automotive-grade qualification and protective features are well matched to the harsh electrical environment inside a head unit (load dump, cold crank, reverse battery).
Recommended
HVAC and Climate Control Module
Climate control modules drive small brushed DC fans, NTC thermistor networks, and a microcontroller with display backlight control. The TLE4476DATMA1's 3.3 V / 350 mA rail powers the MCU and the display logic while its 5 V / 430 mA rail powers the fan-driver logic and NTC biasing. The wide operating temperature range (-40C to +150C junction) and integrated thermal shutdown make it suitable for the high-ambient-temperature environment near a vehicle's HVAC housing, where conventional regulators would derate aggressively.
Recommended
Body Control Module (BCM) Peripheral Power
Body control modules aggregate door locks, lighting drivers, mirror controllers, and various sensors, requiring isolated low-voltage rails for each sub-function. The TLE4476DATMA1 powers the BCM's main MCU (3.3 V) and the sensor-conditioning stage (5 V) from a single post-reverse-battery-protection input. Its low quiescent current and integrated protection support the BCM's quiescent-current budget required for parking-mode current consumption targets.
Recommended
Generic 12V Battery-Powered MCU Board
For prototype and small-volume 12 V-battery-powered MCU boards (e.g., marine electronics, e-bike controllers, off-road vehicle accessories), the TLE4476DATMA1 delivers both 3.3 V and 5 V rails from a single DPAK 4+Tab regulator. The fixed output voltages eliminate the need for external feedback resistors, simplifying BOM and reducing layout errors. Pair with a TVS diode on the input for transient suppression to handle inductive load switching on the 12 V bus.
Recommended
Lighting and LED Driver Module Auxiliary Supply
LED-driver modules for automotive exterior lighting often need a 5 V rail for the controller IC and a 3.3 V rail for the MCU driving the CAN/LIN interface. The TLE4476DATMA1 supplies both rails, allowing the main switching LED driver to operate from a separate higher-voltage buck stage while the TLE4476DATMA1 handles housekeeping logic. Its over-temperature shutdown is valuable in the thermally constrained environment of a sealed lamp housing.
Recommended
Recommended Products Summary
Engineering reference data for TLE4476DATMA1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TLE42764DVATMA1 | TLE42744DV33ATMA1 | TLF80511EJV33XUMA1 |
|---|---|---|---|---|
| Brand | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies |
| Package | PG-TO252-5-11 (DPAK 4+Tab) | PG-TO252-5-11 (DPAK 4+Tab) - same | PG-TO252-5-11 (DPAK 4+Tab) - same | PG-TO252-5-11 (DPAK 4+Tab) - same |
| Topology | Dual fixed LDO (3.3V + 5V) | Single fixed LDO (5V typical) | Single fixed LDO (3.3V) | Single fixed LDO (3.3V) |
| Output 1 Voltage | 3.3 V | [DATA_NEEDED] | 3.3 V | 3.3 V |
| Output 1 Current | 350 mA | [DATA_NEEDED] | [DATA_NEEDED - higher single-rail current] | [DATA_NEEDED - higher single-rail current] |
| Output 2 Voltage | 5.0 V | [DATA_NEEDED - 5V typical] | N/A (single rail only) | N/A (single rail only) |
| Output 2 Current | 430 mA | [DATA_NEEDED] | N/A | N/A |
| Automotive Qualified | Yes (OPTIREG family) | Yes (OPTIREG family) | Yes (OPTIREG family) | Yes (OPTIREG family) |
| Operating Temperature | -40C to +150C (TJ) | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
Key Differentiators
- Two independent fixed rails (3.3 V and 5 V) in a single DPAK package (vs TLE42744DV33ATMA1)
- Integrated over-temperature and short-circuit protection (vs TLF80511EJV33XUMA1)
- Automotive-grade OPTIREG family qualification (vs TLE42764DVATMA1)
Design Notes
The PG-TO252-5-11 (DPAK) package dissipates heat primarily through the exposed tab. Estimated: at VIN=12 V, Q1=3.3 V/350 mA and Q2=5.0 V/430 mA (full load on both rails), total dissipation is approximately (12-3.3)*0.35 + (12-5.0)*0.43 = 3.05 W + 3.01 W = 6.06 W. Use a minimum 1 square inch of top-layer copper connected to the tab and thermal vias to the inner plane to keep junction temperature within the -40C to +150C rating.
Place input and output capacitors as close as possible to the package pins and the tab. Use a low-ESR ceramic or tantalum capacitor on each output (typically 1 uF minimum) and a bulk input capacitor to handle load transients. Route the tab to a large copper pour with multiple thermal vias; the tab also serves as the primary heat path and ground reference. Keep high-current output traces short and wide to minimize voltage drop.
Do not exceed the maximum input voltage specified in the datasheet; in 12 V automotive systems add a TVS diode for load-dump protection. Avoid relying on the tab as a sole electrical ground if your PCB has separate analog and power grounds; the tab is primarily thermal and may be tied to power ground only. Do not draw more than 350 mA from the 3.3 V rail or 430 mA from the 5 V rail, or the regulator will enter current-limit or thermal shutdown.
Keep the feedback/ground paths short by placing ground-return vias directly under the tab. Separate the analog ground (sensor input conditioning) from the power ground (high-current loads) and join them at a single point near the regulator's tab. This minimizes ground bounce from the 5 V/430 mA rail coupling into the 3.3 V rail's analog-sensitive loads.
Compliance Information
RoHS compliant per Infineon OPTIREG family. AEC-Q100 qualification for automotive use is part of the OPTIREG family design - confirm exact grade via the Infineon datasheet ordering table.
