TLE42962GV33HTSA1 - 3.3V 30mA Automotive LDO | Infineon
MPN: TLE42962GV33HTSA1 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.45 | $1.45 |
| 10 | $1.18 | $11.80 |
| 100 | $0.98 | $98.00 |
| 500 | $0.86 | $430.00 |
| 1,000 | $0.74 | $740.00 |
| 3,000 | $0.62 | $1,860.00 |
TLE42962GV33HTSA1 Overview
An LDO (low-dropout) linear regulator is a type of voltage regulator that maintains a stable output voltage even when the input voltage approaches the output voltage within a few hundred millivolts. As a member of the linear regulator family and the broader power management IC category, an LDO trades efficiency for exceptionally low output noise - it dissipates (VIN - VOUT) * IOUT as heat rather than switching, so it adds zero switching ripple to sensitive analog rails. This makes the TLE42962 family a natural fit for always-on microcontroller rails in noisy automotive environments.
Key differentiating features of the TLE42962GV33 include reverse-polarity and load-dump robustness up to 45 V, integrated short-circuit protection with thermal shutdown, and a quiescent current in the microampere range suitable for permanent-battery (KL30/KL15) connections. The 250 mV typical dropout at 30 mA allows tight headroom design, while the AEC-Q100 Grade-1 qualification and -40 C to +150 C junction temperature rating target under-hood and chassis electronics. The fixed 3.3 V output eliminates external feedback resistors, simplifying BOM cost and PCB area.
Internally the part uses a PNP pass element driven by a precision bandgap reference and includes an enable input (INH) for low-Iq standby control. Output accuracy is held within +/-3 % across load, line and temperature, and the device is stable with low-ESR ceramic output capacitors down to 1 uF. Typical quiescent current in standby is below 40 uA, keeping KL30 quiescent drain minimal.
Typical applications include automotive body controllers, instrument cluster MCUs, sensor supply rails, HVAC control modules, and CAN/LIN transceiver standby power. The wide input tolerance and load-dump immunity also make the part suitable for industrial 24 V bus systems and any 12 V/24 V automotive rail that must survive transient events per ISO 7637.
When designing with this part, ensure the input capacitor is placed within a few millimeters of the IN pin to absorb load-dump transients, and verify that PCB copper area under the exposed thermal lead keeps junction temperature within the -40 C to +150 C window. Always check the latest Infineon datasheet for the latest characterization curves and EMC recommendations.
Drop-in alternatives for TLE42962GV33HTSA1 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with TLE42962GV33HTSA1 (same form factor and footprint) β differing in Automotive Qualification, Input Voltage Range, Operating Temperature Range, Package, Protection Features.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
TLE42962GV50HTSA1
β Drop-Inβ In Stock
$0.75 / Unit
View Datasheet βTLE4296GV33HTSA1
β Drop-Inπ Reference alternative (not in catalog)
TLE42962GV33HTSA2
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
TLE42962GV33HTSA1 Maximum Ratings & Electrical Characteristics
| Manufacturer | Infineon Technologies |
| Product Type | Linear Voltage Regulator (LDO), Positive Fixed |
| Output Voltage (Fixed) | 3.3 V |
| Output Voltage Tolerance | +/-3 % (max) |
| Maximum Output Current | 30 mA |
| Input Voltage Range | 4 V to 45 V |
| Dropout Voltage (typ.) | 250 mV at 30 mA |
| Number of Outputs | 1 |
| Package | PG-SCT595-5 (5-lead SMD) |
| Operating Temperature Range | -40 C to +150 C (Tj) |
| Automotive Qualification | AEC-Q100 qualified |
| Protection Features | Reverse polarity, load dump, short circuit, thermal shutdown |
| Enable Input (INH) | Yes (active-high) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
TLE42962GV33HTSA1 Pin Configuration
| Pin 1 | IN β Input voltage (4 V to 45 V); place decoupling capacitor close to pin |
| Pin 2 | GND β Ground return |
| Pin 3 | INH β Enable input (active-high); tie to IN for always-on |
| Pin 4 | OUT β Regulated 3.3 V output (30 mA max) |
| Pin 5 | NC / Thermal Pad β Not connected electrically on most variants; provides thermal path to PCB |
Typical Applications
TLE42962GV33HTSA1 is suitable for 7 applications: Automotive Body Control Module (BCM) MCU Rail, Instrument Cluster Microcontroller Power, Sensor Module Supply Rail, HVAC Control Module MCU Power, CAN/LIN Network Node Standby Power, Industrial 24 V Bus Sensor Power, Battery Management Auxiliary Supply.
Automotive Body Control Module (BCM) MCU Rail
The TLE42962GV33HTSA1 supplies the always-on 3.3 V rail for automotive body controller microcontrollers connected to KL30 battery. Its 4 V to 45 V input tolerance covers cranking dips down to 4 V on a 12 V battery, while the 45 V upper bound survives jump-start and load-dump events. With 30 mA of current, it comfortably powers low-power MCU cores and CAN/LIN transceivers, and the AEC-Q100 qualification and -40 C to +150 C junction rating suit under-dash and chassis-mounted ECUs. The integrated reverse-polarity protection eliminates an external protection diode on the battery feed.
Recommended
Instrument Cluster Microcontroller Power
Instrument clusters need a clean, ripple-free 3.3 V supply for the display driver MCU and stepper motor controllers. The TLE42962GV33HTSA1's linear topology adds zero switching noise to the rail, eliminating the need for additional LC filtering. Its 30 mA output is sufficient for the cluster MCU plus housekeeping logic, and the 4-45 V input range lets the same design operate across 12 V passenger car and 24 V commercial truck platforms without modification. The -40 C to +150 C junction rating covers under-hood and dashboard thermal stress.
Recommended
Sensor Module Supply Rail
Automotive sensor modules (parking sensors, rain/light sensors, battery current sensors) often draw under 30 mA and need a robust supply that survives load-dump. The TLE42962GV33HTSA1's 45 V load-dump rating and reverse-polarity protection let it sit directly on the sensor harness without external TVS chains. Its fixed 3.3 V output powers sensor ASICs and CAN/LIN transceivers, and the enable pin (INH) allows the host ECU to put the sensor into microamp-level standby when the vehicle is parked. Quiescent current in standby stays below typical ECU sleep budgets.
Recommended
HVAC Control Module MCU Power
HVAC head units and climate control modules run low-power MCUs and small TFT displays from a single 3.3 V rail. The TLE42962GV33HTSA1 delivers that rail from the vehicle's 12 V or 24 V bus with built-in transient protection, eliminating discrete TVS diodes on the input. The 30 mA load capability covers the MCU plus display backlight driver housekeeping logic, while the wide operating temperature window accommodates the cabin thermal environment including direct sun loading on upper-dash modules.
Recommended
CAN/LIN Network Node Standby Power
Sleeping CAN and LIN nodes need a few milliamps of standby current to monitor the bus while the rest of the ECU is off. The TLE42962GV33HTSA1's low quiescent current and INH enable input let it stay connected to KL30 permanently and be switched on only when the host wakes the node. Its 45 V tolerance and reverse-polarity protection are well matched to the harsh automotive harness environment, and the 30 mA rating is more than sufficient for a CAN/LIN transceiver plus wake-up logic.
Recommended
Industrial 24 V Bus Sensor Power
Industrial 24 V PLC sensor inputs, isolated I/O modules and remote telemetry units can re-use the TLE42962GV33HTSA1 thanks to its 45 V continuous input rating and load-dump tolerance. The 30 mA output powers 3.3 V sensor ASICs and isolated transceiver primaries, while the fixed output eliminates an external resistor divider. AEC-Q100 qualification gives a robustness margin above commercial-grade LDOs in factory environments with long cable runs and inductive kickback transients.
Recommended
Battery Management Auxiliary Supply
In 12 V / 48 V mild-hybrid battery management systems, the TLE42962GV33HTSA1 can supply a small housekeeping rail for cell-balancing logic or wake-up circuitry on a permanently-connected branch. Its 45 V input handles 48 V bus transients, the low quiescent current preserves KL30 quiescent drain, and the AEC-Q100 automotive pedigree is reassuring for safety-relevant battery ECUs. The fixed 3.3 V output and tiny SCT595-5 footprint simplify layout next to the high-current battery monitor IC.
Recommended
Recommended Products Summary
Engineering reference data for TLE42962GV33HTSA1 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TLE42962GV50HTSA1 | TLE4296GV33HTSA1 | TLE42962GV33HTSA2 |
|---|---|---|---|---|
| Package | PG-SCT595-5 | PG-SCT595-5 - same | PG-SCT595-5 - same | PG-SCT595-5 - same |
| Brand | Infineon | Infineon - same | Infineon - same | Infineon - same |
| Output Voltage | 3.3 V fixed | 5.0 V fixed | 3.3 V fixed | 3.3 V fixed |
| Output Current | 30 mA | 30 mA | 30 mA | 30 mA |
| Input Voltage Range | 4 V to 45 V | 4 V to 45 V | 4 V to 45 V | 4 V to 45 V |
| Dropout Voltage (typ.) | 250 mV at 30 mA | 250 mV at 30 mA | 250 mV at 30 mA | 250 mV at 30 mA |
| AEC-Q100 Qualified | Yes | Yes | Yes | Yes |
| Lifecycle Status | Active | Active | Obsolete | Active |
Key Differentiators
- Wide 4 V to 45 V continuous input range with integrated load-dump and reverse-polarity protection (vs TLE4296GV33HTSA1)
- Active-high INH enable pin for microamp standby control on KL30 (vs TLE42962GV50HTSA1)
- AEC-Q100 automotive qualification with -40 C to +150 C Tj (vs Cross-brand 3.3 V SCT595-5 alternatives (none widely available))
Design Notes
The TLE42962GV33HTSA1 must see at least 4 V at the IN pin to maintain regulation. Below 4 V (cold-crank on a 12 V battery) the output falls out of regulation but the part does not latch off; design downstream circuitry to tolerate brief VOUT droop during cranking. A 100 nF ceramic plus 10 uF electrolytic at IN is recommended to absorb load-dump energy and high-frequency noise from the harness.
At VIN=12 V, VOUT=3.3 V and full 30 mA load, the regulator dissipates approximately 0.26 W - well within the PG-SCT595-5 thermal limits even on a 1 oz 1 square inch copper pour. Worst case at VIN=45 V, VOUT=3.3 V, 30 mA load dissipation is approximately 1.25 W; ensure at least 1 square inch of top-layer copper under the thermal pad to keep Tj below +150 C at +85 C ambient.
Place the input capacitor within 5 mm of the IN pin and the output capacitor within 5 mm of the OUT pin to minimize parasitic inductance that can cause instability with low-ESR ceramics. Use a 1 uF X7R 10 V ceramic on the output for stability - the part is stable with low-ESR ceramic caps down to 1 uF. Keep high-current switching traces away from the feedback and reference traces to avoid noise injection.
Do not leave the INH pin floating; tie it to IN through a 100 kohm resistor for always-on operation, or drive it from a logic-level GPIO for switched standby. Reverse-polarity protection is integrated at the part level, but do not omit an upstream reverse-battery TVS/Schottky if the harness is exposed to sustained reverse voltage beyond a few seconds. Always respect the 45 V absolute-maximum input rating - load-dump transients above 45 V require an external TVS clamp.
Compliance Information
AEC-Q100 qualified per Infineon product page. RoHS and REACH compliant per DigiKey and Mouser listings. Halogen-free per package marking convention. Conflict-minerals compliance declared by Infineon.
