TLF1963TEATMA1 - 1.5A Adj LDO Regulator, 340mV Dropout | Infineon
MPN: TLF1963TEATMA1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.17 | $3.17 |
| 10 | $2.86 | $28.60 |
| 100 | $2.39 | $239.00 |
| 500 | $1.97 | $985.00 |
| 1,000 | $1.72 | $1,720.00 |
Drop-in alternatives for TLF1963TEATMA1 — 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:
TLF1963TE
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TLE42744DV33ATMA1
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View Datasheet →TLE42764DVATMA1
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View Datasheet →LD1086DT50TR
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LM1086IS-ADJ/NOPB
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TLF80511EJV33XUMA1
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View Datasheet →TLF1963TEATMA1 Maximum Ratings & Electrical Characteristics
| Manufacturer | Infineon Technologies |
| Product Type | Linear Voltage Regulator IC (LDO) |
| Output Configuration | Positive, Adjustable |
| Number of Outputs | 1 |
| Output Voltage Range | 1.21 V to 19.66 V |
| Maximum Output Current | 1.5 A |
| Dropout Voltage (typical) | 340 mV at 1.5 A |
| Reference Voltage | 1.21 V typical |
| Operating Junction Temperature | -40 °C to +150 °C |
| Package | PG-TO252-5-13 (TO-252-5 / DPAK, 4 leads + tab) |
| Mounting Type | Surface Mount |
| Packing | Tape & Reel (13-inch, ATMA1 suffix) |
| Protection Features | Current limit, Thermal Shutdown |
| Automotive Qualified | Yes (Infineon automotive-grade) |
| RoHS Status | Compliant (per distributor listings) |
TLF1963TEATMA1 Pin Configuration
| Pin 1 | IN — Input supply voltage (max 20 V) |
| Pin 2 | OUT — Regulated output voltage |
| Pin 3 | GND — Ground |
| Pin 4 | ADJ — Adjust / feedback pin (sets VOUT via resistor divider) |
| Pin 5 | TAB — Exposed tab - internally connected to GND, also serves as thermal pad |
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
TLF1963TEATMA1 is suitable for 6 applications: Automotive Body and Chassis ECU Power, Sensor Supply Rails (5 V / 3.3 V), Point-of-Load (POL) Post-Regulation, Industrial 24 V to 5 V Conversion, Battery-Powered Portable Equipment, After-Market LED Driver Power.
Automotive Body and Chassis ECU Power
The TLF1963TEATMA1 fits automotive 12 V body and chassis ECU supplies because it accepts inputs up to 20 V, survives the -40 °C to +150 °C automotive temperature range, and delivers 1.5 A with only 340 mV dropout - critical during cold-crank when the battery can sag to 6-8 V. Its PNP-pass architecture keeps the loop stable with low-ESR ceramic output capacitors, eliminating the need for noisy switching converters on noise-sensitive sensor rails. Designers use it to derive 5 V from the 12 V battery rail for micro-controllers and CAN transceivers.
Recommended
Sensor Supply Rails (5 V / 3.3 V)
The TLF1963TEATMA1's 1.21 V reference and 1.21-19.66 V adjustable range make it ideal for powering Hall-effect, pressure, and position sensors in industrial and automotive systems. With 340 mV dropout at 1.5 A, it sustains regulation even on cold-cranked battery rails, while the linear topology adds zero switching noise that could couple into high-impedance sensor signal paths. Output is set by a simple resistor divider, and the device needs only a 22 µF low-ESR ceramic on the output for stability.
Recommended
Point-of-Load (POL) Post-Regulation
The TLF1963TEATMA1 is well-suited as a post-regulator after a switching pre-converter on FPGA, DSP, or micro-controller power trees. The 340 mV dropout lets it ride on the 1.0-1.8 V rails with minimal headroom, while its low-noise linear output removes switching ripple that would otherwise degrade ADC SNR and DAC linearity. It can deliver 1.5 A continuously to feed core logic rails, and its exposed-tab DPAK package provides the thermal mass needed to absorb transient load steps.
Recommended
Industrial 24 V to 5 V Conversion
The TLF1963TEATMA1 handles industrial 24 V bus inputs because its 20 V input ceiling permits operation on 24 V ±20 % nominal rails up to ~28 V is the safe max not the spec - more realistically it can be used as a post-regulator from a 24 V pre-regulator. When used as a 24 V to 5 V converter at low currents (<0.4 A), the dissipation of approximately 7.6 W remains within DPAK thermal limits with adequate copper pour. Designers choose the part for its automotive-grade robustness and immunity to industrial EMI events.
Recommended
Battery-Powered Portable Equipment
The TLF1963TEATMA1's 340 mV low-dropout behavior extends battery life in portable equipment by allowing the regulator to stay in regulation even as the battery approaches the output voltage. A 3.6 V Li-ion cell can drive a 3.3 V load at 1.5 A through the TLF1963TEATMA1 with only 0.3 V of headroom, extracting the last few percent of usable energy that a high-dropout regulator would waste. The TO-252-5 package keeps the solution footprint under 100 mm².
Recommended
After-Market LED Driver Power
Linear constant-current LED drivers benefit from the TLF1963TEATMA1's adjustable output and 1.5 A current capability. By replacing the bottom feedback resistor with a sense resistor, the part can be configured as a constant-current source for high-brightness LED strings operating from a 12 V or 24 V supply. The lack of switching noise keeps EMI low - critical for automotive interior lighting and signage that must meet CISPR 25 conducted emissions.
Recommended
Recommended Products Summary
Engineering reference data for TLF1963TEATMA1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TLF1963TE | TLE42744DV33ATMA1 | TLE42764DVATMA1 | LD1086DT50TR | LM1086IS-ADJ/NOPB | TLF80511EJV33XUMA1 |
|---|---|---|---|---|---|---|---|
| Brand | Infineon | Infineon | Infineon | Infineon | STMicroelectronics | Texas Instruments | Infineon |
| Package | TO-252-5 (DPAK) | TO-252-5 (DPAK) - same | TO-252-5 (DPAK) - same | TO-252-5 (DPAK) - same | TO-252-5 (DPAK) - same | TO-263-3 (D2PAK) - larger D2PAK variant | TO-252-5 (DPAK) - same |
| Output Type | Adjustable | Adjustable | Fixed 3.3 V | Fixed tracker | Adjustable (or 5 V fixed variant) | Adjustable | Fixed 3.3 V |
| Maximum Output Current | 1.5 A | 1.5 A | 0.4 A | 0.4 A | 1.5 A | 1.5 A | 0.4 A |
| Dropout Voltage | 340 mV at 1.5 A | 340 mV at 1.5 A | [DATA_NEEDED] | [DATA_NEEDED] | 1.3 V at 1.5 A | 1.3 V at 1.5 A | [DATA_NEEDED] |
| Output Voltage Range | 1.21 V to 19.66 V | 1.21 V to 19.66 V | 3.3 V fixed | Fixed tracker | 1.25 V to ~15 V (adjustable) | 1.25 V to ~15 V (adjustable) | 3.3 V fixed |
| Input Voltage Range | Up to 20 V | Up to 20 V | Up to 45 V | Up to 45 V | Up to 30 V | Up to 30 V | Up to 45 V |
| Automotive Qualified | Yes | Yes | Yes | Yes | Industrial grade | Industrial grade | Yes |
Key Differentiators
- True 340 mV low dropout at 1.5 A - lower than the LD1086/LM1086 family (vs LD1086DT50TR)
- 1.5 A output in DPAK with automotive qualification - higher current than TLE42744 family (vs TLE42744DV33ATMA1)
- Adjustable output from 1.21 V to 19.66 V vs fixed 3.3 V (vs TLF80511EJV33XUMA1)
Design Notes
Estimated: at VIN = 14 V (worst-case automotive load-dump-sustained), VOUT = 5 V, and IOUT = 1.5 A, the TLF1963TEATMA1 must dissipate (14 - 5) × 1.5 = 13.5 W. The DPAK package on a standard JEDEC 1 sq-in. copper pour has θJA ≈ 50 °C/W, yielding a junction temperature rise of about 675 °C above ambient - far exceeding the 150 °C maximum. Designers must either reduce VIN, drop the output to 8 V (dissipation ≈ 9 W, ΔTJ ≈ 450 °C - still excessive), or step down VIN with a switching pre-regulator to keep dissipation under 5 W. In practice, derate to ≤ 0.5 A continuous for true 12 V to 5 V conversion on the DPAK footprint alone.
The exposed tab of the TO-252-5 package must be soldered to the PCB copper pad to meet the thermal specifications. Use a copper-pour area of at least 1 square inch (645 mm²) connected to the tab. The thermal pad should have multiple thermal vias (typically 4-9) under the tab to conduct heat into inner PCB planes. Place input and output capacitors as close as physically possible to the IN and OUT pins to minimize parasitic inductance and ensure loop stability.
Three common mistakes when using the TLF1963TEATMA1: (1) omitting the ADJ resistor divider - the part requires external feedback to set the output, not just capacitors; (2) using high-ESR output capacitors - the control loop requires a minimum 22 µF low-ESR ceramic or tantalum, and ESR above the datasheet limit will cause oscillation; (3) neglecting the input voltage ceiling of 20 V - sustained voltages above 20 V can damage the pass element. Always verify VIN stays within the datasheet absolute maximum rating and that VOUT ≤ VIN - 0.34 V under all load conditions.
Route the ADJ trace away from the noisy IN and OUT traces to prevent noise injection into the feedback loop. Keep the trace from OUT to the top of the resistor divider as short as possible and place R1/R2 close to the ADJ pin. If the layout requires a long ADJ trace, use a small guard ground trace between ADJ and the noisy switching nodes. The ground return of the bottom feedback resistor R2 should tie directly to the GND pin, not to a remote ground point, to prevent ground-loop errors in the regulation setpoint.
Compliance Information
RoHS and REACH compliance per distributor listings. AEC-Q100 qualified per Infineon automotive-grade designation. Halogen-free status not explicitly stated in available data - marked unknown.
