LT1763CS8-3.3#TRPBF - 3.3V 500mA Low-Noise LDO | Analog Devices
料号： LT1763CS8-3.3#TRPBF ✓ 量产中LT1763CS8-3.3#TRPBF 概述
An LDO is a linear regulator that maintains a relatively stable output voltage while dissipating power as the difference between input and output voltage multiplied by load current. Compared with a switching regulator, an LDO generally offers simpler control and lower switching-related noise, making the LT1763 suitable for RF systems, battery-powered equipment, low-noise analog supplies, and communication circuits. The LT1763 family also includes fixed outputs from 1.5V through 5V and an adjustable version with a 1.22V reference voltage.
Key verified features include a 500mA output-current capability, a 300mV dropout voltage, and low 30uA quiescent current. The 3.3V fixed-output suffix identifies the target rail, while the CS8 package designation identifies the 8-lead SOIC form used by the distributor listings. The low quiescent current is particularly useful when the regulator is expected to consume little power during unloaded or lightly loaded battery operation.
The LT1763 series is described by the manufacturer as a micropower, low-noise, low-dropout regulator family. Its architecture is intended to provide regulation close to the load, which can help reduce supply perturbations in RF and precision analog systems. The family data identifies 8-lead SO and 12-lead DFN package options, while this particular orderable MPN is listed in 8-SO packaging.
Typical uses include RF systems, battery-powered products, communications equipment, sensor interfaces, and analog signal-conditioning circuits requiring a 3.3V rail. When selecting the device, verify the complete manufacturer electrical characteristics, including input-voltage limits, output accuracy, noise, stability, current limit, thermal behavior, and capacitor requirements. The verified web data provides the principal identity, output voltage, current rating, package family, dropout, and quiescent-current facts; additional detailed limits are marked where not supplied.
For implementation, place the regulator close to the load and follow the manufacturer datasheet recommendations for input and output capacitors, layout, and thermal management. The low 30uA quiescent current is a useful advantage in portable systems, but the final power budget must include regulator dissipation and load-dependent behavior. This page combines verified manufacturer and distributor information with application guidance and identifies where additional datasheet values are needed.
直接替换替代料： LT1763CS8-3.3#TRPBF ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
LT1763CS8-3.3#PBF
✅ 直接替换📋 参考替代料（不在目录中）
LT1763IS8-3.3#TRPBF
✅ 直接替换📋 参考替代料（不在目录中）
LT1763CS8-3#TRPBF
✅ 直接替换📋 参考替代料（不在目录中）
LT1763CS8-5#TRPBF
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
LT1763CS8-2.5#TRPBF
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
LT1763CS8-3.3#TRPBF 最大额定值与电气特性
| Regulator Type | Fixed positive low-dropout linear regulator |
| 输出电压 | 3.3 V |
| Output Current | 500 mA |
| 压差电压 | 300 mV |
| 静态电流 | 30 uA |
| 封装 | 8-lead SOIC |
| Package Family | SOIC-8 surface-mount package |
| 安装类型 | Surface mount |
| RoHS 状态 | Compliant |
LT1763CS8-3.3#TRPBF soic-8 surface-mount package 引脚配置指南
LT1763CS8-3.3#TRPBF（soic-8 surface-mount package 封装）的引脚配置。 该功率器件具有栅极、漏极和源极端子。对于无极性封装，请参阅制造商数据手册以了解确切的引脚 1 方向和封装尺寸细节。常见应用包括电源设计、电机驱动和负载开关。
暂无详细引脚数据： LT1763CS8-3.3#TRPBF.
请参阅 数据手册 以查看完整引脚配置。
典型应用
LT1763CS8-3.3#TRPBF 适用于 6 应用s: RF Systems, Battery-Powered Equipment, Low-Noise Analog Supplies, Communications Modules, Sensor Interfaces, Industrial Control Logic.
RF Systems
The LT1763CS8-3.3#TRPBF fits RF-system supply points that require a fixed 3.3V rail with low dropout and low quiescent current. Place it near the RF load to reduce supply-path disturbance, while observing the verified 500mA current rating and 300mV dropout requirement. The regulator's low-noise family positioning is useful when switching circuitry or battery transients could otherwise disturb sensitive RF stages. Confirm the complete input range, output accuracy, stability requirements, and thermal limits in the manufacturer datasheet before release.
推荐
Battery-Powered Equipment
The LT1763CS8-3.3#TRPBF is appropriate for portable equipment that operates from a battery-derived 3.3V rail. Its verified 30uA quiescent current helps limit regulator overhead during light-load or standby periods, while the 300mV dropout specification supports regulation when the input approaches the output. Actual battery savings depend on the load profile, so calculate both quiescent consumption and load-dependent dissipation. Confirm that the battery voltage remains above the required dropout headroom at the highest current.
推荐
Low-Noise Analog Supplies
Use the LT1763CS8-3.3#TRPBF when a downstream analog circuit needs a simple, fixed 3.3V supply and the system benefits from the LT1763 family's low-noise, low-dropout architecture. Its 500mA capability is suitable for moderate analog loads, and the 8-lead SOIC package supports conventional surface-mount assembly. The exact noise spectrum and output accuracy are not supplied in the verified data, so do not select it solely on an unquantified noise claim; review the official datasheet and measure the final supply under the intended load and layout.
推荐
Communications Modules
The LT1763CS8-3.3#TRPBF can provide a fixed 3.3V rail for communication modules whose operating voltage and current fit the LT1763 family's verified 3.3V, 500mA capability. A low-dropout LDO may simplify the power tree compared with adding another switching stage, although the trade-off is linear dissipation and potentially lower conversion efficiency when the input-to-output voltage difference is large. Place input and output capacitors close to the device and verify the datasheet's recommended values and stability conditions.
推荐
Sensor Interfaces
The LT1763CS8-3.3#TRPBF is suitable for small sensor-interface boards that need a local 3.3V regulator and can remain below 500mA. Local regulation can reduce the voltage variation seen by the sensor circuitry compared with routing an unprotected system rail directly to the sensor. The part's 30uA quiescent current is useful for compact battery-powered sensor nodes, but the complete input range and temperature limits must be checked against the source voltage and enclosure conditions before design release.
推荐
Industrial Control Logic
The LT1763CS8-3.3#TRPBF can serve as a local 3.3V regulator for low- to moderate-current industrial control logic when a linear rail is preferred for simplicity and low switching noise. The 500mA output rating supports many logic and interface loads, but the design must include thermal analysis proportional to the input-output voltage difference and current. Confirm the industrial temperature range, transient response, output capacitor requirements, and pin-level electrical ratings in the manufacturer documentation before using it in a production control board.
推荐
推荐产品汇总
工程参考数据： LT1763CS8-3.3#TRPBF ——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 | LT1763CS8-3.3#PBF | LT1763IS8-3.3#TRPBF | LT1763CS8-3#TRPBF | LT1763CS8-5#TRPBF | LT1763CS8-2.5#TRPBF |
|---|---|---|---|---|---|---|
| Output Voltage | 3.3 V | 3.3 V | 3.3 V family variant; confirm suffix specifications | 3 V | 5 V | 2.5 V |
| Package | 8-lead SOIC | 8-SO family package | 8-lead SOIC family format | 8-SO family package | 8-SO family package | 8-SO family package |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Output Type | Fixed positive | Fixed positive | Fixed positive family variant | Fixed positive | Fixed positive | Fixed positive |
| Regulator Family | LT1763 | LT1763 | LT1763 | LT1763 | LT1763 | LT1763 |
关键差异点
- Fixed 3.3V output with 500mA capability （对比 LT1763CS8-3#TRPBF)
- Low 30uA quiescent current （对比 LT1763CS8-3.3#PBF)
- 500mA low-dropout regulator in SOIC-8 （对比 LT1763CS8-5#TRPBF)
设计说明
Estimated: with a 5V input, 3.3V output, and 100mA load, the ideal linear-regulator dissipation is (5V - 3.3V) × 0.1A = 0.17W. The actual device loss also includes quiescent current and internal losses, while the SOIC-8 thermal performance depends on PCB copper and ambient temperature. Verify the calculated dissipation against the manufacturer thermal limits before production.
Place the input capacitor, regulator, and output capacitor in a short current-loop path. Keep the regulator ground return compact and use the datasheet-recommended capacitor values and ESR range. Because the verified data does not include those values, do not select capacitors from memory; verify them against the official LT1763 datasheet and the intended output stability test conditions.
Do not confuse the 3.3V suffix with the 3V or 5V LT1763 variants. A 3V regulator cannot safely replace this part in a circuit that requires 3.3V, and a 5V part can damage downstream 3.3V devices. Also confirm the exact SOIC footprint, pin mapping, temperature grade, and ordering suffix before treating any related LT1763 MPN as a drop-in replacement.
合规信息
RoHS compliance is supported by the verified cross-reference data. REACH, AEC-Q100, lead-free, halogen-free, and conflict-minerals information were not sufficiently provided and remain unknown.
