TL750M05CKCSE3 - 750mA 5V LDO Regulator, TO-220 | Texas Instruments
MPN: TL750M05CKCSE3 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.45 | $24.50 |
| 100 | $1.95 | $195.00 |
| 500 | $1.65 | $825.00 |
| 1,000 | $1.38 | $1,380.00 |
TL750M05CKCSE3 Overview
What is an LDO (Low-Dropout) linear regulator? An LDO is a type of linear voltage regulator that maintains a stable output voltage even when the input voltage is only slightly higher than the output - the 'dropout' voltage. Compared to standard regulators, LDOs offer tighter regulation, faster transient response, and very low quiescent current, making them ideal for post-regulation after a switching converter or for direct battery-powered applications. In the broader taxonomy, the TL750M05 belongs to linear regulators, a subset of voltage regulators, which sit under power management ICs in the semiconductor hierarchy.
Key features include very low dropout voltage (less than 750 mV at full load), 60-V load-dump protection, internal current limiting, thermal shutdown, and reverse-battery protection. The fixed 5V output eliminates external resistor dividers, simplifying the BOM. The TO-220 package with metal tab enables direct PCB mounting or heatsink attachment for high-power dissipation.
The TL750M05CKCSE3 uses a bipolar pass-element architecture optimized for very low quiescent current draw, which extends battery life in standby conditions. It is specifically engineered to survive the harsh electrical environment of automotive 12V systems, including jump-start, load-dump, and reverse-battery events.
Typical applications include automotive infotainment and instrument clusters, body control modules, post-regulation after switching converters, battery-powered industrial equipment, and any 12V/24V system that requires a regulated 5V rail with robust transient protection. The TL751M series variant adds an enable pin for power sequencing.
When designing with this device, ensure input and output capacitors are placed close to the IC, and use a sufficient copper pour or external heatsink when VIN-VOUT differential is high. The tab is electrically connected to ground or output depending on the version - always verify against the datasheet before mounting.
This page synthesizes distributor pricing, drop-in alternatives from the same TL750M family, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for TL750M05CKCSE3 — 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:
TL750M05CKCE3
✅ Drop-In📋 Reference alternative (not in catalog)
TL750M05CKC
✅ Drop-In📋 Reference alternative (not in catalog)
TL751M05CKCSE3
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
TL750M05QKCSRQ1
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
L4940L05
✅ Drop-In📋 Reference alternative (not in catalog)
TL750M05CKCSE3 Maximum Ratings & Electrical Characteristics
| Regulator Type | Low-Dropout (LDO) Positive Fixed |
| Output Voltage | 5 V (4.9 V to 5.1 V) |
| Output Current | 750 mA |
| Input Voltage Range | Up to 26 V |
| Dropout Voltage | Less than 750 mV at full load |
| Quiescent Current | Low quiescent current (per datasheet) |
| Load-Dump Protection | 60 V |
| Reverse-Battery Protection | Yes |
| Overvoltage Protection | Internal |
| Thermal-Overload Protection | Internal |
| Overcurrent Limiting | Internal |
| Enable Pin | No (TL751M variant has enable) |
| Package | TO-220 (KCS), 3 pins + tab |
| Operating Temperature Range | 0 °C to 125 °C |
| Mounting Type | Through-Hole |
| RoHS Status | Compliant |
TL750M05CKCSE3 Pin Configuration
| Pin 1 | IN — Input voltage supply (VIN) |
| Pin 2 | GND — Ground |
| Pin 3 | OUT — Regulated 5V output |
| Pin TAB | TAB — Metal tab electrically connected to output (OUT); provides thermal dissipation path |
Typical Applications
TL750M05CKCSE3 is suitable for 6 applications: Automotive Infotainment Power Rail, Body Control Module (BCM) 5V Rail, Industrial 24V to 5V Post-Regulator, Battery-Powered Portable Equipment, Switching Converter Post-Regulation for Clean Analog Rails, Automotive Reverse-Battery and Load-Dump Protection Circuit.
Automotive Infotainment Power Rail
The TL750M05CKCSE3 is well suited for automotive infotainment head units and instrument clusters that require a clean, regulated 5V rail from the 12V battery bus. Its 60-V load-dump protection, reverse-battery immunity, and very low dropout (<750 mV at 750 mA) ensure survival during jump-start, cold-crank, and load-dump transients that are common in 12V automotive systems. The fixed 5V output eliminates external resistor dividers, simplifying the BOM and reducing PCB area in space-constrained head units. With internal thermal shutdown and overcurrent limiting, the regulator is self-protecting during output short-to-battery faults that occur in harsh automotive environments. Compared to switching pre-regulators, the LDO adds no high-frequency noise that could couple into audio amplifiers or radio tuners.
Recommended
Body Control Module (BCM) 5V Rail
Body control modules in vehicles distribute power to door locks, lighting, and sensors from a regulated 5V rail. The TL750M05CKCSE3 provides this 5V rail with 750 mA capacity, sufficient to power multiple low-current sensor loads and small relays through driver stages. The TO-220 (KCS) package with metal tab allows direct PCB mounting with copper pour heatsinking, simplifying the BCM's thermal design without external heatsinks at moderate duty cycles. The device's reverse-battery protection eliminates the need for an external Schottky diode at the input, saving BOM cost and board space. Its very low quiescent current minimizes parasitic drain on the battery when the vehicle is parked for weeks.
Recommended
Industrial 24V to 5V Post-Regulator
In industrial 24V systems, the TL750M05CKCSE3 serves as a post-regulator after a switching pre-regulator to provide a clean, low-noise 5V rail for analog sensors, ADCs, and 4-20 mA loop interfaces. When placed downstream of a 24V-to-7V buck converter, the LDO dissipates only ~1.5 W at 750 mA, easily handled by the TO-220 tab with moderate copper pour. The wide VIN tolerance (up to 26 V) accommodates 24V industrial bus surges without overvoltage damage. Compared to using a buck regulator alone, the LDO post-regulator eliminates switching ripple that could couple into precision analog front-ends, improving ADC SNR.
Recommended
Battery-Powered Portable Equipment
Portable medical and test instruments running from a 6V to 18V battery stack benefit from the TL750M05CKCSE3's very low quiescent current and wide input range. The regulator maintains a stable 5V rail for microcontrollers, displays, and sensor front-ends as the battery discharges, with dropout protection kicking in only when VIN falls below ~5.75 V. Reverse-battery protection is critical for user-replaceable battery applications where polarity mistakes can occur. The fixed 5V output eliminates the need for an enable pin or external feedback components, keeping standby drain to a minimum.
Recommended
Switching Converter Post-Regulation for Clean Analog Rails
Switching DC-DC converters generate ripple in the 50 kHz to 2 MHz range that can couple into sensitive analog circuits. The TL750M05CKCSE3 placed after a switching pre-regulator attenuates this ripple by 60+ dB through its high PSRR, delivering clean 5V for op-amps, DACs, and precision references. With 750 mA capacity, it can supply a multi-channel data acquisition system. The TO-220 package's thermal performance supports continuous operation at moderate VIN-VOUT differentials without external heatsinking, simplifying mechanical design.
Recommended
Automotive Reverse-Battery and Load-Dump Protection Circuit
The TL750M05CKCSE3 is engineered specifically to survive the harsh transient environment of automotive 12V batteries, including 60-V load-dump pulses and reverse-battery connections without external protection components. It serves as the heart of a simple, robust 5V regulator for any automotive accessory - from dashboard cameras to GPS trackers - that must operate reliably across the full automotive voltage range. The device's internal overvoltage, overcurrent, and thermal protections form a self-contained solution that does not require additional TVS diodes or fuses for basic compliance with automotive electrical standards.
Recommended
Recommended Products Summary
Engineering reference data for TL750M05CKCSE3 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TL750M05CKCE3 | TL750M05CKC | TL751M05CKCSE3 | TL750M05QKCSRQ1 | L4940L05 |
|---|---|---|---|---|---|---|
| Package | TO-220 (KCS) 3-pin + tab | ITO-220 (same die, different package code) | TO-220 (KCS) - same | TO-220 (KCS) - same | TO-220 (KCS) - same | TO-220 - same outline |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | STMicroelectronics |
| Output Voltage | 5 V fixed | 5 V fixed | 5 V fixed | 5 V fixed | 5 V fixed | 5 V fixed |
| Output Current | 750 mA | 750 mA | 750 mA | 750 mA | 750 mA | 1.5 A (+100%) |
| Enable Pin | No | No | No | Yes (TTL/CMOS-compatible) | No | No |
| Reverse-Battery Protection | Yes | Yes | Yes | Yes | Yes | No |
| RoHS Compliance | Yes (E3 suffix) | Yes (E3 suffix) | No (no E3 suffix) | Yes (E3 suffix) | Yes | Yes |
Key Differentiators
- Integrated 60-V load-dump and reverse-battery protection (vs L4940L05)
- Enable-pin variant available in same footprint (vs TL750M05CKCSE3 itself)
- AEC-Q100 automotive grade available (vs TL750M05CKCSE3 (standard))
- Very low quiescent current for battery applications (vs MC33269T-5.0G)
Design Notes
At VIN=12V, VOUT=5V, and IOUT=750 mA, the TL750M05CKCSE3 dissipates approximately 5.25 W. The TO-220 (KCS) package requires either an external heatsink or substantial PCB copper pour on the tab to keep junction temperature within the 0°C to 125°C operating range. For high-line 24V industrial applications (VIN=24V, VOUT=5V), dissipation reaches ~14.25 W, which mandates a heatsink.
Place the input and output capacitors as close to the IC pins as possible. Use a 0.1 µF ceramic bypass capacitor on the input within 5 mm of the IN pin, plus a 10 µF or larger aluminum electrolytic or tantalum bulk capacitor. On the output, use a 10 µF or larger capacitor with low ESR to ensure regulator stability. Wide copper traces on the IN, OUT, and tab connections improve both electrical and thermal performance.
The metal tab of the TL750M05CKCSE3 is electrically connected to the OUT pin - do not short the tab to ground or to a heatsink that is not also at the OUT potential. In automotive applications, add an external TVS diode or fuse upstream if the battery feed can exceed 26 V for extended periods, since the internal overvoltage protection is designed for transient events, not continuous overvoltage.
Compliance Information
RoHS compliant per TI product page (E3 suffix denotes lead-free finish). Standard TL750M05CKCSE3 is not AEC-Q100 qualified - select TL750M05QKCSRQ1 for automotive applications.
