TLE42744EV50XUMA1 - 400mA, 40V, 5V Fixed LDO | Infineon
MPN: TLE42744EV50XUMA1 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.79 | $1.79 |
| 10 | $1.62 | $16.20 |
| 100 | $1.41 | $141.00 |
| 500 | $1.18 | $590.00 |
| 1,000 | $0.99 | $990.00 |
TLE42744EV50XUMA1 Overview
An LDO (Low-Dropout) linear regulator is a type of voltage regulator that maintains a stable output voltage even when the input voltage is very close to the output voltage. Within the broader system hierarchy, LDOs belong to the linear regulator family, which is itself a subset of voltage regulators and power management ICs. Unlike switching converters, an LDO dissipates the VIN-VOUT differential as heat but introduces no switching noise, which is critical for noise-sensitive analog and sensor signal chains.
Key features of the TLE42744EV50 include an input voltage range up to 40 V, fixed 5 V output with Β±2% precision, integrated protection against overload, short-circuit, and overtemperature conditions, and a low quiescent current in normal operation. The device is designed to withstand the load-dump and jump-start transients typical of automotive electrical systems, with an operating junction temperature range of -40 Β°C to +150 Β°C.
The TLE42744EV50 uses a monolithic bipolar architecture optimized for low quiescent current and high ripple rejection. The PG-SSOP-14-2 package with exposed thermal pad provides low thermal resistance to support continuous 400 mA output without external heatsinking at moderate VIN-VOUT headroom.
Typical applications include automotive body and chassis ECUs, sensor and actuator power supplies, infotainment subsystems, and industrial 24 V bus regulators that require a robust, low-noise 5 V rail. Designers also deploy this part in standby supply rails for microcontrollers and CAN transceivers.
When designing with this device, verify that worst-case VIN-VOUT differential times full load current stays below the package power-dissipation rating, and add input/output ceramic capacitors close to the IC per the datasheet typical application circuit. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for TLE42744EV50XUMA1 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 TLE42744EV50XUMA1 (same form factor and footprint) β differing in Package, Input Voltage Range, Output Voltage, Output Type, Maximum Output Current.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
TLE42744EV33XUMA1
β Drop-Inπ Reference alternative (not in catalog)
TLE42744DV50ATMA1
β Drop-Inβ In Stock
$0.74 / Unit
View Datasheet βTLS805B1SJVXUMA1
β Drop-Inβ In Stock
$1.8 / Unit
View Datasheet βTLS850B0TEV50ATMA1
β Drop-Inβ In Stock
$0.96 / Unit
View Datasheet βTLS115D0LDXUMA1
β Drop-In β οΈ εζ°εΎ ιͺθ―β In Stock
$1.21 / Unit
View Datasheet βTLE42744EV50XUMA1 Maximum Ratings & Electrical Characteristics
| Manufacturer | Infineon Technologies |
| Series | OPTIREG linear |
| Product Type | LDO Linear Voltage Regulator |
| Output Type | Fixed |
| Output Voltage (Nominal) | 5.0 V |
| Output Voltage Accuracy | Β±2% |
| Maximum Output Current | 400 mA |
| Input Voltage Range | 5.5 V to 40 V |
| Dropout Voltage (typical) | 250 mV at 400 mA |
| Number of Outputs | 1 |
| Polarity | Positive |
| Operating Temperature Range | -40 Β°C to +150 Β°C |
| Package | PG-SSOP-14-2 (14-pin SSOP with exposed pad) |
| Mounting Type | Surface Mount |
| Protection Features | Overload, Short-Circuit, Overtemperature |
| Automotive Qualified | Yes (designed for harsh automotive environment) |
| RoHS Status | Compliant |
| Halogen-Free | Yes |
TLE42744EV50XUMA1 Pin Configuration
| Pin 1 | I β Input voltage |
| Pin 2 | I β Input voltage (parallel to pin 1 for improved thermal/electrical performance) |
| Pin 3 | NC β Not connected (per datasheet) |
| Pin 4 | NC β Not connected (per datasheet) |
| Pin 5 | GND β Ground |
| Pin 6 | NC β Not connected (per datasheet) |
| Pin 7 | NC β Not connected (per datasheet) |
| Pin 8 | Q β Regulated 5 V output |
| Pin 9 | Q β Regulated 5 V output (parallel to pin 8) |
| Pin 10 | NC β Not connected (per datasheet) |
| Pin 11 | NC β Not connected (per datasheet) |
| Pin 12 | NC β Not connected (per datasheet) |
| Pin 13 | NC β Not connected (per datasheet) |
| Pin 14 | TAB β Exposed thermal pad (connect to GND for heatsinking) |
Typical Applications
TLE42744EV50XUMA1 is suitable for 6 applications: Automotive Body Control Module (BCM) Power Supply, Automotive Sensor and ECU Standby Rail, Industrial 24 V Bus Regulator, Infotainment Head-Unit Auxiliary Power, Chassis and Powertrain ECU Power, Truck and 24 V Heavy-Duty Vehicle Electronics.
Automotive Body Control Module (BCM) Power Supply
The TLE42744EV50XUMA1 provides a robust 5 V/400 mA rail for automotive body control modules directly fed from the 12 V battery bus. Its 40 V maximum input withstands 24 V jump-start and 35 V load-dump transients per ISO 7637-2, and its integrated short-circuit, overload, and overtemperature protection eliminates the need for external MOSFET hot-swap FETs. With Β±2% output accuracy and 250 mV typical dropout, the LDO reliably powers relays, H-bridges, and CAN transceiver logic domains. The PG-SSOP-14-2 exposed pad provides a low thermal-resistance path suitable for underhood and behind-dash modules where ambient can reach +85 Β°C.
Recommended
Automotive Sensor and ECU Standby Rail
Engineers use the TLE42744EV50XUMA1 as a low-noise standby rail for sensors and small ECUs in automotive systems where EMI from switching regulators would corrupt analog measurements. Its 250 mV typical dropout at 400 mA ensures regulation through 12 V cold-crank dips down to ~5.5 V, while the monolithic bipolar architecture produces clean DC with no switching ripple. The -40 Β°C to +150 Β°C junction temperature range supports both cabin-mounted and underhood sensor housings. The fixed 5 V output simplifies the bill of materials by removing external feedback resistors typical of adjustable LDOs.
Recommended
Industrial 24 V Bus Regulator
In factory automation, the TLE42744EV50XUMA1 is well suited to step down industrial 24 V PLC bus rails to a clean 5 V/400 mA supply for I/O modules, sensor interfaces, and HMI panels. The 40 V input rating tolerates the +20%/-15% voltage excursions common on long 24 V cable runs, and the overtemperature protection prevents thermal runaway in enclosed control cabinets. Compared to a buck converter, this LDO delivers a quieter 5 V rail for ADCs and analog front-ends without LC filter complexity. The PG-SSOP-14-2 exposed pad enables surface-mount PCB layouts with minimal heatsinking.
Recommended
Infotainment Head-Unit Auxiliary Power
The TLE42744EV50XUMA1 supplies auxiliary 5 V rails in automotive infotainment head units, powering Bluetooth/Wi-Fi modules, audio CODECs, and small display controllers that require a quiet supply. Its Β±2% output voltage accuracy ensures stable reference voltages for audio DACs, while the 40 V input allows direct connection to the battery rail with no upstream pre-regulator. The PG-SSOP-14-2 small footprint supports space-constrained head-unit PCB layouts where thermal performance is critical. Integrated protection features reduce the need for external fuses or TVS clamps in the 5 V domain.
Recommended
Chassis and Powertrain ECU Power
Engineers integrate the TLE42744EV50XUMA1 into chassis and powertrain ECUs - including ABS, EPS, and transmission controllers - where 12 V/24 V battery feed tolerance and thermal robustness are paramount. The 40 V maximum input voltage and -40 Β°C to +150 Β°C junction range meet AEC-Q100-style harsh-environment requirements, and integrated protections guard against wiring harness faults that can apply transient voltages to the ECU supply pin. The 5 V fixed output with Β±2% precision provides a stable logic-rail reference for the host MCU and CAN/LIN transceivers.
Recommended
Truck and 24 V Heavy-Duty Vehicle Electronics
In commercial trucks, buses, and off-highway heavy equipment, the 24 V nominal battery system can swing between 18 V and 32 V during normal operation and reach 36 V during load-dump. The TLE42744EV50XUMA1's 40 V maximum input voltage absorbs these transients while delivering a stable 5 V/400 mA supply to instrument clusters, telematic control units, and lighting controllers. The exposed-pad PG-SSOP-14-2 package provides adequate thermal dissipation for continuous cab-mounted operation. Its automotive-grade design heritage makes it a strong choice for 24 V vehicle subsystems.
Recommended
Recommended Products Summary
Engineering reference data for TLE42744EV50XUMA1 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TLE42744EV33XUMA1 | TLE42744DV50ATMA1 | TLS805B1SJVXUMA1 | TLS850B0TEV50ATMA1 |
|---|---|---|---|---|---|
| Package | PG-SSOP-14-2 | PG-SSOP-14-2 - same | PG-SSOP-14-2 - same | PG-SSOP-14-2 - same | PG-SSOP-14-2 - same |
| Brand | Infineon | Infineon | Infineon | Infineon | Infineon |
| Output Voltage | 5.0 V fixed | 3.3 V fixed | 5.0 V fixed | 5.0 V fixed | 5.0 V fixed |
| Output Current | 400 mA | 400 mA | 400 mA | 50 mA | 500 mA |
| Input Voltage (max) | 40 V | 40 V | 40 V | 45 V | 42 V |
| Output Accuracy | Β±2% | Β±2% | Β±2% | Β±2% | Β±2% |
| Operating Temperature Range | -40 Β°C to +150 Β°C | -40 Β°C to +150 Β°C | -40 Β°C to +150 Β°C | -40 Β°C to +125 Β°C | -40 Β°C to +150 Β°C |
Key Differentiators
- 40 V maximum input voltage with automotive-grade protection (vs TLS805B1SJVXUMA1)
- Higher continuous output current than smaller-package OPTIREG LDOs (vs TLS805B1SJVXUMA1)
- Same-family pin compatibility across output voltages (vs TLE42744EV33XUMA1)
Design Notes
At VIN=24 V, VOUT=5 V and 400 mA continuous load, power dissipation is (24-5)Γ0.4 = 7.6 W. The PG-SSOP-14-2 with exposed pad has a typical theta_JA around 50 Β°C/W on a 1-square-inch 2-oz copper pour, yielding a junction temperature rise of ~380 Β°C above ambient - well above the 150 Β°C limit. Either derate to under ~200 mA at 24 V input, step down VIN with a pre-regulator, or use the DPAK-packaged TLE42744DV50ATMA1 for higher dissipation. Estimate: theta_JA = 50 Β°C/W assumes 1 sq-in 2-oz copper.
Solder the PG-SSOP-14-2 exposed pad (TAB, pin 14) to a top-layer copper pour connected to GND; this provides both the primary heatsinking path and a low-inductance ground reference. Place input and output ceramic capacitors (typically 100 nF to 1 Β΅F X7R) within 2-3 mm of the I and Q pins per the Infineon OPTIREG datasheet typical application circuit. Keep the high-current output traces wide (β₯0.5 mm per 100 mA) to minimize voltage drops and thermal gradients.
Do not confuse the TLE42744E (PG-SSOP-14-2) with the TLE42744D (TO-252/DPAK) - the packages are not pin-compatible and require different PCB footprints. Also note that the 'V50' suffix denotes 5.0 V output; the 'V33' variant (TLE42744EV33XUMA1) outputs 3.3 V. When replacing on an existing PCB, verify both the output voltage and the package pinout before substituting. The input voltage must remain above 5.5 V minimum at all times to maintain regulation.
Compliance Information
RoHS compliant and halogen-free per Infineon product page. Designed for harsh automotive environment per Infineon OPTIREG datasheet. The TLE42744EV50 family is part of Infineon's automotive-grade OPTIREG linear regulator portfolio.
