TL750M05CKCSE3 - 750mA 5V LDO Regulator, TO-220 | Texas Instruments
料号： TL750M05CKCSE3 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 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 概述
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.
直接替换替代料： TL750M05CKCSE3 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
TL750M05CKCE3
✅ 直接替换📋 参考替代料（不在目录中）
TL750M05CKC
✅ 直接替换📋 参考替代料（不在目录中）
TL751M05CKCSE3
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
TL750M05QKCSRQ1
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
L4940L05
✅ 直接替换📋 参考替代料（不在目录中）
TL750M05CKCSE3 最大额定值与电气特性
| Regulator Type | Low-Dropout (LDO) Positive Fixed |
| 输出电压 | 5 V (4.9 V to 5.1 V) |
| Output Current | 750 mA |
| 输入电压范围 | Up to 26 V |
| 压差电压 | Less than 750 mV at full load |
| 静态电流 | Low quiescent current (per datasheet) |
| Load-Dump Protection | 60 V |
| Reverse-Battery Protection | Yes |
| Overvoltage Protection | Internal |
| Thermal-Overload Protection | Internal |
| Overcurrent Limiting | Internal |
| 使能引脚 | No (TL751M variant has enable) |
| 封装 | TO-220 (KCS), 3 pins + tab |
| 工作温度范围 | 0 °C to 125 °C |
| 安装类型 | Through-Hole |
| RoHS 状态 | Compliant |
TL750M05CKCSE3 引脚配置
| 引脚 1 | IN — Input voltage supply (VIN) |
| 引脚 2 | GND — Ground |
| 引脚 3 | OUT — Regulated 5V output |
| 引脚 TAB | TAB — Metal tab electrically connected to output (OUT); provides thermal dissipation path |
典型应用
TL750M05CKCSE3 适用于 6 应用s: 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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
推荐产品汇总
工程参考数据： TL750M05CKCSE3 ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | 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 |
关键差异点
- Integrated 60-V load-dump and reverse-battery protection （对比 L4940L05)
- Enable-pin variant available in same footprint （对比 TL750M05CKCSE3 itself)
- AEC-Q100 automotive grade available （对比 TL750M05CKCSE3 (standard))
- Very low quiescent current for battery applications （对比 MC33269T-5.0G)
设计说明
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.
合规信息
RoHS compliant per TI product page (E3 suffix denotes lead-free finish). Standard TL750M05CKCSE3 is not AEC-Q100 qualified - select TL750M05QKCSRQ1 for automotive applications.
