TPS76133DBVR - 100mA, 3.3V Fixed LDO Regulator | Texas Instruments
料号： TPS76133DBVR ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $0.39 | $0.39 |
| 10 | $0.34 | $3.40 |
| 100 | $0.28 | $28.00 |
| 500 | $0.23 | $115.00 |
| 1,000 | $0.19 | $190.00 |
TPS76133DBVR 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 approaches the output voltage. Within the broader power-management hierarchy, LDOs sit under linear regulators, which themselves are a subset of voltage regulators and ultimately power management ICs (PMICs). Unlike switching converters, LDOs add no high-frequency switching noise to the output, making them the preferred post-regulation stage for noise-sensitive analog and RF rails.
Key features include a typical dropout of approximately 170 mV at 100 mA load (per TI product characterization), reverse-battery protection on the input, and a logic-level active-high shutdown pin that draws less than 1 uA quiescent current when disabled. The SOT-23-5 footprint allows direct replacement of legacy 5-pin LDOs while reducing PCB area, and the -40 C to +125 C operating junction temperature range supports industrial and automotive-adjacent designs.
The TPS76133 uses a PNP pass element topology, which gives it the low-dropout characteristic and enables reverse-current blocking when the input is shorted to ground. The internal bandgap reference and feedback network are trimmed at the wafer level, so no external resistor divider is required for fixed 3.3 V operation - simplifying BOM count compared to adjustable LDOs.
Typical applications include 3.3 V rails for MSP430 microcontrollers, real-time clocks, low-power wireless modules (BLE, sub-GHz), and post-regulation after a switching DC-DC converter in handheld test equipment. The shutdown pin enables wake/sleep duty-cycling to extend battery life in IoT edge nodes.
When designing with the TPS76133DBVR, place a 1 uF ceramic input capacitor and a 1 uF ceramic output capacitor as close to the IC pins as possible. Because the device is intended for battery inputs, ensure input transients (load-dump, reverse-polarity) are clamped upstream to stay within the 16 V absolute maximum rating.
直接替换替代料： TPS76133DBVR ——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：
TPS76130DBVR
✅ 直接替换📋 参考替代料（不在目录中）
TPS76132DBVR
✅ 直接替换📋 参考替代料（不在目录中）
TPS76133DBVT
✅ 直接替换📋 参考替代料（不在目录中）
TPS79133DBVR
✅ 直接替换📋 参考替代料（不在目录中）
MCP1700-3302E/TO
✅ 直接替换📋 参考替代料（不在目录中）
TPS76133DBVR 最大额定值与电气特性
| 输出类型 | Fixed |
| 输出电压 | 3.3 V |
| 最大输出电流 | 100 mA |
| Absolute Maximum Input Voltage | 16 V |
| Quiescent Current (Shutdown) | < 1 uA |
| 工作结温 | -40 C to +125 C |
| 封装 | SOT-23-5 (DBV) |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant |
| Shutdown Pin | Yes (active-high, <1 uA Iq in shutdown) |
| ESD Protection | Yes (per TI product page) |
| Reverse Current Protection | Yes |
| Process Technology | BiCMOS |
TPS76133DBVR 引脚配置
| 引脚 1 | IN — Unregulated input supply |
| 引脚 2 | GND — Ground |
| 引脚 3 | EN — Enable (active high); tie to IN if unused |
| 引脚 4 | NC — Not connected (per datasheet) |
| 引脚 5 | OUT — Regulated 3.3 V output |
典型应用
TPS76133DBVR 适用于 6 应用s: MSP430 Microcontroller 3.3 V Rail, Battery-Powered IoT Sensor Node, Post-Regulation After Switching DC-DC, Real-Time Clock and Backup Power, Handheld Test and Measurement Equipment, Automotive Accessory and Aftermarket Modules.
MSP430 Microcontroller 3.3 V Rail
The TPS76133DBVR delivers a clean, fixed 3.3 V rail directly to MSP430 microcontrollers from a single-cell Li-ion or 2x/3x alkaline battery stack. Its 100 mA continuous current capability covers most MSP430-family MCUs plus their analog front end, while the <1 uA shutdown quiescent current allows firmware-controlled sleep modes to dominate the system energy budget. The 16 V absolute maximum input withstands typical load-dump transients on 12 V industrial buses, and the SOT-23-5 footprint keeps the solution under 10 mm^2 on the PCB.
推荐
Battery-Powered IoT Sensor Node
The TPS76133DBVR is purpose-built for battery-powered IoT nodes such as BLE beacons, environmental sensors, and remote controls. Its <1 uA shutdown Iq enables deep sleep cycles that extend coin-cell and Li-ion battery life to multiple years. Reverse-battery protection prevents damage when users insert cells backwards in field-replaceable designs. The fixed 3.3 V output eliminates external resistor dividers, reducing BOM count and assembly cost. Use the EN pin to duty-cycle the regulator with the host MCU for ultra-low average power consumption.
推荐
Post-Regulation After Switching DC-DC
Placing the TPS76133DBVR downstream of a switching buck converter eliminates high-frequency ripple on noise-sensitive analog and RF rails. The LDO's high PSRR at low frequencies cleans up residual switching noise, providing a quiet 3.3 V supply for ADCs, DACs, VCOs, and PLL charge pumps. Although the LDO dissipates VIN-VOUT headroom as heat, the 100 mA rating keeps thermal rise manageable in most post-regulation scenarios, and the small SOT-23-5 footprint fits beside the upstream inductor.
推荐
Real-Time Clock and Backup Power
The TPS76133DBVR's low quiescent current and reverse-current protection make it well-suited to supply real-time clocks (RTCs) and SRAM backup domains. The fixed 3.3 V output matches the VCC requirement of common RTCs such as the DS3231 and PCF8523. The <1 uA shutdown current allows the host MCU to disable non-critical loads while keeping the RTC running, and the wide input range accepts a coin-cell backup supply or main system rail without level shifting.
推荐
Handheld Test and Measurement Equipment
The TPS76133DBVR powers op-amps, references, and ADCs in portable DMMs and handheld oscilloscope probes that run on 9 V or 12 V batteries. Its 16 V input ceiling accepts 9 V alkaline and 12 V sealed lead-acid packs directly, and the reverse-battery protection prevents field failures from reversed cells. The 100 mA rating is sufficient for 4-digit DMM displays and small LCDs, while the SOT-23-5 footprint fits inside cramped handheld enclosures.
推荐
Automotive Accessory and Aftermarket Modules
Although the TPS76133DBVR is not AEC-Q100 qualified, its 16 V absolute maximum and reverse-battery protection suit non-safety automotive accessory applications such as dashcams, GPS trackers, and OBD-II dongles powered from the 12 V vehicle bus. The 100 mA output covers low-power wireless modules and small microcontrollers. Add an upstream TVS diode and fuse to clamp load-dump transients below the 16 V input rating.
推荐
推荐产品汇总
工程参考数据： TPS76133DBVR ——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 | TPS76130DBVR | TPS76132DBVR | TPS76133DBVT | TPS79133DBVR | MCP1700-3302E/TO |
|---|---|---|---|---|---|---|
| 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 | SOT-23-5 - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Microchip Technology |
| Output Voltage | 3.3 V | 3.0 V | 3.2 V | 3.3 V | 3.3 V | 3.3 V |
| Maximum Output Current | 100 mA | 100 mA | 100 mA | 100 mA | 100 mA | 250 mA |
| Absolute Max Input Voltage | 16 V | 16 V | 16 V | 16 V | 5.5 V | 6.0 V |
| Process Technology | BiCMOS | BiCMOS | BiCMOS | BiCMOS | BiCMOS | CMOS |
关键差异点
- Reverse-battery protection integrated on input （对比 TPS79133DBVR)
- Fixed 3.3 V output eliminates external resistor divider （对比 MCP1700-3302E/TO)
- SOT-23-5 (DBV) package compatible with full TPS761xx family （对比 TPS76130DBVR / TPS76132DBVR)
设计说明
Place a 1 uF ceramic input capacitor as close as possible to pin 1 (IN) and a 1 uF ceramic output capacitor as close as possible to pin 5 (OUT) to ensure regulator stability. The TPS76133 is designed for low-ESR ceramic capacitors; X7R or X5R dielectric is recommended. Bulk input capacitance may be added upstream if the source impedance is high or transient loads are expected.
At full 100 mA load with VIN near the 16 V absolute maximum, power dissipation can approach (16 V - 3.3 V) * 0.1 A = 1.27 W. The SOT-23-5 package has a theta_JA of approximately 200-250 C/W on a standard JEDEC test board, which can push the junction above 125 C. For sustained high-input-voltage operation, reduce VIN, lower the load, or use a heatsinked copper pour to keep Tj below the 125 C limit.
Do not exceed 16 V on the input - even brief transients above 16 V can damage the device. In automotive or industrial environments with 12 V or 24 V buses, add a TVS diode upstream to clamp load-dump transients. If the EN pin is left floating, the internal pull-down may cause indeterminate behavior; tie EN to IN via a 100 kohm resistor for default-on operation.
合规信息
RoHS and lead-free compliant per TI product page. Not AEC-Q100 qualified - not recommended for automotive safety-critical applications.