LT3010EMS8E - 50mA, 80V LDO Linear Regulator | Analog Devices
料号： LT3010EMS8E ✓ 量产中LT3010EMS8E 概述
A low-dropout (LDO) linear regulator is a type of voltage regulator that maintains a stable output voltage even when the input voltage approaches the output voltage. Within the broader power management IC hierarchy, LDOs sit alongside switching converters and supervisors; unlike switching regulators, they introduce no switching noise but dissipate the voltage difference as heat, making them ideal for noise-sensitive analog and RF loads. The LT3010 belongs to the micropower LDO subcategory defined by very low quiescent current (typically 30 µA at no load), enabling long battery life in always-on systems.
Key features include 50 mA continuous output current, 30 µA quiescent current, 60 V maximum adjustable output, 80 V maximum input, reverse-input and reverse-output protection, thermal limiting with hysteresis, and a shutdown pin that drops quiescent current to approximately 1 µA. The exposed-pad MSOP-8 package provides a low thermal resistance of approximately 40 °C/W (depending on PCB layout), supporting reliable operation at elevated ambient temperatures.
The regulator uses a PNP pass architecture with a precision bandgap reference. This topology enables the wide VIN range and low dropout while keeping ground pin current low and relatively constant over load, an improvement over older NPN regulator designs. A single external resistor divider sets the adjustable output, and the SHDN pin allows logic-level on/off control for power sequencing.
Typical applications include industrial 24 V sensor supplies, automotive battery-fed loads, factory automation modules, bias supplies for op-amps and references, and post-regulation following switching converters where clean, low-noise rails are required.
When designing with the LT3010, ensure sufficient PCB copper area under the exposed pad to manage thermal dissipation; at 50 mA and a large VIN–VOUT differential, power dissipation can exceed 2 W. Always include the recommended input/output capacitors and verify stability with the manufacturer-recommended ESR range.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, giving engineers a single decision-ready reference for the LT3010EMS8E.
直接替换替代料： LT3010EMS8E ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
LT3010HMS8E
✅ 直接替换📋 参考替代料（不在目录中）
LT3010EMS8E-5#PBF
✅ 直接替换📋 参考替代料（不在目录中）
LT3010EMS8E#WPBF
✅ 直接替换📋 参考替代料（不在目录中）
LT3010MPMS8E
✅ 直接替换📋 参考替代料（不在目录中）
LT3014BES5#TRMPBF
✅ 直接替换📋 参考替代料（不在目录中）
LT3010EMS8E 最大额定值与电气特性
| 输出类型 | Adjustable |
| 输出电压范围 | 1.275 V to 60 V |
| 输出电流（最大） | 50 mA |
| 输入电压范围 | 3 V to 80 V |
| 压差电压 | 300 mV at 50 mA |
| 静态电流 | 30 µA (typ) |
| 关断电流 | 1 µA (typ) |
| 基准电压 | 1.275 V |
| 工作温度 | -40 °C to +125 °C |
| 封装 | 8-MSOP-EP (Exposed Pad) |
| 安装类型 | Surface Mount |
| Protection Features | Reverse input, reverse output, thermal shutdown |
| Shutdown Pin | Yes (active-high) |
| RoHS 状态 | Compliant |
LT3010EMS8E 引脚配置
| 引脚 1 | IN — Input supply voltage (3V to 80V) |
| 引脚 2 | SHDN — Shutdown pin (active-high, tie to IN if unused) |
| 引脚 3 | ADJ — Adjustable output feedback (connect to resistor divider for adjustable version) |
| 引脚 4 | BYP — Bypass pin for noise reduction capacitor |
| 引脚 5 | GND — Ground |
| 引脚 6 | OUT — Regulated output voltage |
| 引脚 7 | GND — Ground (exposed pad) |
| 引脚 8 | GND — Ground (exposed pad) |
典型应用
LT3010EMS8E 适用于 7 应用s: Industrial 24V Sensor Power Supply, Automotive Battery-Fed Loads, Factory Automation PLC Modules, Bias Supply for Op-Amps and References, Battery-Powered Remote Monitoring, Post-Regulation After Switching Converter, Telecom and Networking Equipment.
Industrial 24V Sensor Power Supply
The LT3010EMS8E's 80 V maximum input and 1.275 V to 60 V adjustable output make it ideal for 24 V industrial sensor rails that must tolerate transients up to 80 V. Its 30 µA quiescent current preserves power budget in always-on field instruments. Placed after protection TVS and common-mode chokes, it post-regulates noisy 24 V to a clean 5 V or 12 V rail feeding analog front ends. Unlike switching regulators, the LDO adds no EMI that could couple into adjacent analog signal paths, making it suitable for precision transducer excitation.
推荐
Automotive Battery-Fed Loads
The 80 V input withstand capability allows the LT3010EMS8E to absorb load-dump transients in 12 V automotive systems, simplifying protection circuitry. With 50 mA output and 1.275 V reference, the device powers microcontrollers, sensors, and CAN transceivers directly from the battery rail. Its thermal shutdown and reverse-input protection add robustness for under-hood and chassis-mounted modules. Compared to wide-VIN switching converters, the LDO's lack of switching noise avoids coupling into AM radio bands or sensitive sensor signal chains.
推荐
Factory Automation PLC Modules
In PLC analog input modules powered from 24 V backplanes, the LT3010EMS8E provides a local post-regulated rail that rejects backplane noise. The wide input range tolerates voltage drops across long cable runs without losing regulation. With 50 mA available, the LDO can power several op-amp channels and a small ADC reference simultaneously. The exposed pad MSOP-EP package allows sufficient thermal dissipation at typical 24 V-to-5 V conversions, where power dissipation reaches 950 mW at 50 mA load.
推荐
Bias Supply for Op-Amps and References
Precision op-amps and voltage references require clean, low-noise supply rails to maintain DC accuracy and PSRR specifications. The LT3010EMS8E provides a stable 5 V or ±15 V dual-rail configuration that, while not as quiet as ultra-low-noise LDOs, is sufficient for general-purpose analog signal chains. Its wide VIN range allows it to follow a switching pre-regulator for efficiency while supplying a clean analog rail downstream - a common mixed-signal PCB topology.
推荐
Battery-Powered Remote Monitoring
With 30 µA quiescent current and 1 µA shutdown current, the LT3010EMS8E is well suited to remote, battery-powered monitoring nodes where sleep-mode power consumption dominates battery life. The 80 V VIN tolerance also enables operation from external solar or POE-derived supplies with wide voltage variation. Used as a post-regulator after a small switching converter, it provides the final clean rail to a microcontroller and sensor while the upstream switching stage handles bulk conversion for efficiency.
推荐
Post-Regulation After Switching Converter
In mixed-signal designs where a switching converter provides bulk power efficiency, the LT3010EMS8E serves as a downstream LDO to remove switching ripple. Placed between the switching node and noise-sensitive loads like ADCs or DACs, it eliminates high-frequency ripple while accepting the same wide VIN range. The wide VIN window means the same LDO can follow various switching pre-regulators (12 V, 24 V, 48 V) without re-design, simplifying multi-product platforms.
推荐
Telecom and Networking Equipment
In telecom racks with -48 V nominal supplies (positive-ground systems up to 80 V), the LT3010EMS8E provides local regulation for line cards and media converters. The 1 µA shutdown current enables power-cycling individual line cards for fault isolation or energy savings during off-peak hours. Combined with the exposed-pad thermal performance, it supports continuous operation in enclosed cabinets with limited airflow at elevated ambient temperatures typical of central offices.
推荐
推荐产品汇总
工程参考数据： LT3010EMS8E ——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 | LT3010HMS8E | LT3010EMS8E-5#PBF | LT3010EMS8E#WPBF | LT3010MPMS8E |
|---|---|---|---|---|---|
| Package | 8-MSOP-EP | 8-MSOP-EP - same | 8-MSOP-EP - same | 8-MSOP-EP - same | 8-MSOP-EP - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Input Voltage Range | 3 V to 80 V | 3 V to 80 V | 3 V to 80 V | 3 V to 80 V | 3 V to 80 V |
| Output Current | 50 mA | 50 mA | 50 mA | 50 mA | 50 mA |
| Output Voltage | Adjustable 1.275 V to 60 V | Adjustable 1.275 V to 60 V | Fixed 5 V | Adjustable 1.275 V to 60 V | Adjustable 1.275 V to 60 V |
| Junction Temperature | -40 °C to +125 °C (E-grade) | -40 °C to +150 °C (H-grade) | -40 °C to +125 °C (E-grade) | -40 °C to +125 °C (W-grade) | -55 °C to +150 °C (MP-grade) |
| Quiescent Current | 30 µA | 30 µA | 30 µA | 30 µA | 30 µA |
| Dropout at Full Load | 300 mV at 50 mA | 300 mV at 50 mA | 300 mV at 50 mA | 300 mV at 50 mA | 300 mV at 50 mA |
| RoHS Status | Compliant | Compliant | Compliant | Compliant | Compliant |
关键差异点
- Industry-leading 80V input tolerance for a 50mA LDO （对比 LT3014B (20V input))
- Micropower 30µA quiescent current with full 80V VIN range （对比 LM7812 (5mA quiescent at 35V max))
- Shutdown pin with 1µA current （对比 LT3014B (no SHDN pin))
设计说明
Estimated: At VIN = 24 V, VOUT = 5 V, and 50 mA load, the LT3010EMS8E dissipates approximately (24-5) × 0.05 = 0.95 W. With a typical MSOP-EP θJA around 40 °C/W on a 1 oz copper 1 sq inch pad, junction temperature rises about 38 °C above ambient. At 50 mA with VIN close to VOUT (e.g., 5.5 V to 5 V), dissipation is only 25 mW and no thermal concern exists. For higher dissipation scenarios, expand copper area under the exposed pad or reduce VIN-VOUT differential by adding a switching pre-regulator.
Per Analog Devices datasheet recommendations, place input and output ceramic capacitors as close as possible to the IC pins to minimize parasitic inductance. The exposed pad must be soldered to a PCB ground plane with thermal vias for heat dissipation. Use a star-ground topology where the LDO ground pin and load ground return to the same point to prevent ground-loop noise from coupling into the regulated output. A BYP capacitor of 10 nF to 100 nF on the bypass pin reduces output noise significantly.
Do not exceed 80 V on the IN pin or 60 V on the OUT pin. For adjustable versions, use 1% or better tolerance resistors in the feedback divider to maintain output accuracy; the ADJ pin bias current is negligible so resistor values up to 100 kΩ work without significant error. If the SHDN pin is unused, tie it to IN to ensure the regulator stays enabled. The OUT capacitor ESR must remain within the datasheet stability window - using ceramic capacitors with very low ESR may require a series resistor or different capacitor chemistry.
Route the ADJ feedback trace away from switching nodes and noisy traces to prevent coupling. Keep input and output capacitor ground returns short and direct to the exposed pad. For dual-rail designs using two LT3010s, place the input capacitors at a common node and route outputs separately to avoid cross-regulation issues. If using the BYP pin for noise reduction, place the bypass capacitor directly adjacent to the BYP pin with minimal trace length.
合规信息
Lead-free #PBF finish. RoHS compliant per Analog Devices product page. The LT3010 family is not AEC-Q100 qualified; for automotive applications, consider AEC-Q100 qualified LDOs from TI or Infineon.
