TPS70950DBVR - 150mA, 30V Ultra-Low IQ LDO Regulator | Texas Instruments
料号： TPS70950DBVR ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $1.05 | $1.05 |
| 10 | $0.92 | $9.20 |
| 100 | $0.74 | $74.00 |
| 500 | $0.59 | $295.00 |
| 1,000 | $0.48 | $480.00 |
| 3,000 | $0.39 | $1,170.00 |
TPS70950DBVR 概述
An LDO (Low-Dropout) linear regulator is a type of voltage regulator that maintains a stable output voltage even when the input voltage is only slightly above the output. LDOs sit within the broader hierarchy of linear regulators -> voltage regulators -> power management ICs -> semiconductors. Unlike switching regulators, LDOs do not introduce EMI but dissipate the difference (VIN - VOUT) * IOUT as heat. They are preferred where low noise, simplicity, and fast transient response are critical.
The TPS70950DBVR delivers 150 mA continuous output current, has a typical dropout of 690 mV at full load, and offers integrated thermal shutdown plus current-limit protection. The SOT-23-5 footprint (2.9 mm x 1.6 mm) makes it one of the smallest wide-input LDOs available, ideal for space-constrained industrial and battery-powered designs.
Architecturally, the part uses a PMOS pass element, which lowers ground-pin current to a minimum and enables true reverse-current blocking without a secondary diode. The 1 uA IQ makes the TPS70950DBVR well-suited to always-on, standby, or sleep-mode rails in IoT, metering, and remote-sensor applications.
Typical applications include battery-powered IoT sensors, PLC analog I/O modules, portable medical monitors, smart meters, and post-regulation of switching converters where a clean 5V rail is required. The wide input range also allows direct connection to 12V/24V industrial bus rails.
When designing with this device, place a 1 uF or larger ceramic input capacitor close to IN, and a 1 uF or larger low-ESR ceramic output capacitor close to OUT. Account for dropout at the worst-case 150 mA load and the lowest VIN in your system; for a 5V output from a battery below 5.69V the regulator will drop out of regulation.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet. Engineers searching for a wide-VIN, ultra-low-IQ 5V LDO in SOT-23-5 will find the TPS70950DBVR datasheet, parameters, and verified alternatives below.
直接替换替代料： TPS70950DBVR ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： TPS70950DBVR （相同外形与封装尺寸） ——差异在于 Package, Input Voltage Range, MSL Level, Operating Temperature Range, Dropout Voltage.
快速对比工具——选择替代料号进行并排对比：
TPS70950DBVT
✅ 直接替换📋 参考替代料（不在目录中）
TPS70950QDBVRQ1
✅ 直接替换📋 参考替代料（不在目录中）
TPS709B50DBVR
✅ 直接替换📋 参考替代料（不在目录中）
TPS70933DBVR
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
TPS70925DBVR
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
TPS70930DBVR
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
TPS70950DBVR 最大额定值与电气特性
| Manufacturer | Texas Instruments |
| Series | TPS709 |
| 输出类型 | Fixed |
| Output Voltage (Nominal) | 5.0 V |
| 输入电压范围 | 2.7 V to 30 V |
| 最大输出电流 | 150 mA |
| Dropout Voltage (Typical) | 690 mV at 150 mA |
| Quiescent Current (Typical) | 1 uA |
| Output Accuracy | 2% over temperature |
| 使能引脚 | Yes (active-low) |
| Reverse Current Protection | Yes |
| 热关断 | Yes |
| 限流 | Yes |
| 工作温度范围 | -40 C to +125 C |
| 封装 | SOT-23-5 (DBV) 2.9 mm x 1.6 mm |
| 安装类型 | Surface Mount |
| MSL 等级 | 1 (unlimited) |
| RoHS 状态 | Compliant |
TPS70950DBVR 引脚配置
| 引脚 1 | IN — Input voltage supply (2.7V to 30V) |
| 引脚 2 | GND — Ground |
| 引脚 3 | EN — Enable pin (active-low, internal pull-down) |
| 引脚 4 | NC — Not connected (per datasheet) |
| 引脚 5 | OUT — Regulated output voltage (5.0V fixed) |
典型应用
TPS70950DBVR 适用于 6 应用s: Battery-Powered IoT Sensor Nodes, Industrial 24V Bus Analog I/O, Post-Regulator After Switching Converter, Smart Metering and Utility Monitoring, Portable Medical Monitoring Devices, Always-On Standby Rails in Appliances.
Battery-Powered IoT Sensor Nodes
The TPS70950DBVR is ideal for battery-powered IoT sensor nodes that spend most of their life in sleep mode. Its 1 uA quiescent current means the regulator contributes almost nothing to standby drain - a coin cell powering a sensor duty-cycled 0.1% of the time can last years. The 30 V input tolerates charging transients, and the 150 mA output can power an MCU + radio combo when the sensor wakes. Place 1 uF ceramic caps on IN and OUT within 5 mm of the pins for noise immunity.
推荐
Industrial 24V Bus Analog I/O
Industrial PLC analog input modules need a clean, low-noise 5V rail derived directly from the 24V bus. The TPS70950DBVR accepts 2.7V to 30V input, allowing direct connection to a 24V supply without a pre-regulator. Its 1 uA IQ does not load the bus when the module is in standby. The 5V fixed output powers op-amps, ADC references, and 4-20 mA loop interfaces. Reverse-current blocking prevents backflow when the bus is hot-swapped.
推荐
Post-Regulator After Switching Converter
Use the TPS70950DBVR as a post-regulator downstream of a switching DC-DC converter to remove switching noise from sensitive analog rails. The switching converter handles the bulk voltage step-down efficiently, while the TPS709 cleans up residual ripple with its high PSRR. At 150 mA and 5 V output, it can power op-amps, sensors, or reference circuits. The 30 V input covers the typical 12 V or 24 V intermediate bus.
推荐
Smart Metering and Utility Monitoring
Smart electricity meters require a 5 V rail for the metrology IC and MCU, often powered from 12-24 V AC-derived DC buses. The TPS70950DBVR's 30 V input range accommodates wide rectified bus variations. Its 1 uA IQ extends battery-backed RTC life during power outages. Reverse-current protection prevents the metrology IC from back-driving the bus during maintenance. The SOT-23-5 package fits in the cramped meter enclosure.
推荐
Portable Medical Monitoring Devices
Portable patient monitors (pulse oximeters, glucose meters, ECG patches) need ultra-low standby drain and a clean rail for the analog front end. The TPS70950DBVR's 1 uA IQ keeps battery life long, while its low noise floor avoids contaminating low-amplitude analog signals. The wide VIN range accepts various battery chemistries (2x AA, Li-ion, coin cells with boost). The small SOT-23-5 footprint enables wearable form factors.
推荐
Always-On Standby Rails in Appliances
White goods and HVAC appliances need an always-on 5 V standby rail to power the control MCU and wireless module even when the main converter is off. The TPS70950DBVR's 1 uA IQ draws negligible power from the auxiliary winding. Its 30 V input handles rectified mains-derived rails. The enable pin allows the main MCU to power down the TPS709 when the appliance is in deep standby, further reducing consumption.
推荐
推荐产品汇总
工程参考数据： TPS70950DBVR ——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 | TPS70950DBVT | TPS70950QDBVRQ1 | TPS709B50DBVR | TPS70933DBVR |
|---|---|---|---|---|---|
| Package | SOT-23-5 (DBV) | SOT-23-5 (DBV) - same | SOT-23-5 (DBV) - same | SOT-23-5 (DBV) - same | SOT-23-5 (DBV) - same |
| Brand | Texas Instruments | Texas Instruments - same | Texas Instruments - same | Texas Instruments - same | Texas Instruments - same |
| Output Voltage | 5.0 V | 5.0 V | 5.0 V | 5.0 V | 3.3 V |
| Output Current | 150 mA | 150 mA | 150 mA | 150 mA | 150 mA |
| Input Voltage Range | 2.7 V to 30 V | 2.7 V to 30 V | 2.7 V to 30 V | 2.7 V to 30 V | 2.7 V to 30 V |
| Quiescent Current | 1 uA | 1 uA | 1 uA | 1 uA | 1 uA |
| Automotive Grade (AEC-Q100) | No | No | Yes (AEC-Q100) | No | No |
| Reel Format | Standard 7-inch reel (-R suffix) | Larger reel (-T suffix) | Standard 7-inch reel | Smaller reel format | Standard 7-inch reel |
关键差异点
- Wide 30V input range in SOT-23-5 footprint （对比 TPS70933DBVR)
- Ultra-low 1 uA quiescent current （对比 LM1117)
- Integrated reverse-current protection （对比 MIC5205)
设计说明
Place a 1 uF or larger ceramic capacitor on IN (within 5 mm) and a 1 uF or larger low-ESR ceramic capacitor on OUT (within 5 mm). According to the TI TPS709 datasheet, the output capacitor ESR must be below 200 mOhm to maintain loop stability. X5R or X7R dielectric is recommended. Account for DC bias derating - a 10 uF 0805 ceramic can lose 60% of its rated capacitance at 5 V bias.
At VIN=24V, VOUT=5V, and full 150 mA load, the TPS70950DBVR dissipates approximately (24-5)*0.150 = 2.85 W. The SOT-23-5 package has a theta_JA of approximately 200 C/W on a standard JEDEC 2-layer board, leading to a junction temperature rise of 570 C above ambient - well above the 125 C limit. For industrial 24 V bus applications, either derate to <50 mA, reduce VIN with a pre-regulator, or use the TPS709 in the larger WSON package.
Route the EN trace away from noisy switching nodes. The EN pin has an internal pull-down, so leaving it floating disables the regulator. To enable at power-up, either tie EN directly to IN or drive it from an MCU GPIO. For reverse-current protection to function correctly, do not place a diode or series resistance between OUT and the load that could create a back-flow path.
Do not exceed the 30 V absolute maximum VIN - even brief transients from load-dump or hot-plug events can destroy the part. Add a TVS diode or input clamp for automotive 24V bus applications. The NC pin (pin 4) is not internally connected; do not use it as a thermal via connection because the die is bonded only to the lead frame. Output current above 150 mA triggers current-limit foldback, not constant current - sustained overcurrent will heat the part into thermal shutdown.
合规信息
Standard TPS70950DBVR is not AEC-Q100 qualified; choose TPS70950QDBVRQ1 for automotive. RoHS and lead-free compliant per TI product page.
