TPS389001DSET - 1.15V Supervisor, 6-WSON | Texas Instruments
料号： TPS389001DSET ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $1.62 | $1.62 |
| 10 | $1.46 | $14.60 |
| 100 | $1.07 | $107.00 |
| 500 | $0.86 | $430.00 |
| 1,000 | $0.72 | $720.00 |
TPS389001DSET 概述
A voltage supervisor, also known as a reset IC or voltage monitor, is a type of power management integrated circuit that observes a system rail and generates a deterministic reset or interrupt when that rail drifts out of regulation. Supervisors sit within the broader power management hierarchy: voltage supervisor -> reset/monitor IC -> power management IC -> semiconductor. They are essential in any system where a microcontroller, SoC, or processor requires a clean, glitch-free reset signal during power-up, power-down, and brown-out events. The TPS3890 family specifically targets ultra-low-power monitoring with a user-programmable reset delay.
Key features include a user-adjustable threshold (TPS389001 variant, factory-trimmed to roughly 1.0 V above VREF on the SENSE pin), a programmable reset delay set by an external capacitor on the CT pin, a manual reset (MR) input, and an open-drain active-low RESET output that supports wired-OR with other rails. The internal bandgap reference and trimmed comparator deliver 1% monitoring accuracy, while the typical quiescent current in the single-digit microampere range extends battery life in always-on applications.
Architecturally, the TPS389001 uses a precision bandgap reference, a high-accuracy comparator, an adjustable delay block driven by CT, and a low-leakage open-drain FET output. The combination of hysteresis on the sense input and the programmable delay prevents false resets during brief transients, while the wide 1.5 V to 5.5 V supply range allows the device to be powered directly from the rail it monitors in many systems.
Typical applications include IoT sensor nodes, wearables, portable medical monitors, e-metering, and any battery-powered MCU system that needs a robust power-on reset. The 6-WSON (1.5x1.5) footprint makes it one of the smallest supervisors in its class, ideal for high-density boards.
When designing with this part, place the CT capacitor close to the CT pin to ensure accurate timing, and add a pull-up resistor (typically 10 kohm to 100 kohm) on the open-drain RESET output. Verify that the SENSE input is robust against inrush transients on the monitored rail.
This page synthesizes distributor stock, drop-in alternatives in the same 6-WSON footprint, and practical design notes not found in the manufacturer datasheet.
直接替换替代料： TPS389001DSET ——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： TPS389001DSET （相同外形与封装尺寸） ——差异在于 Function, MSL Level, Number of Channels, Output Type, Package.
快速对比工具——选择替代料号进行并排对比：
TPS389025DSET
✅ 直接替换📋 参考替代料（不在目录中）
TPS389033DSET
✅ 直接替换📋 参考替代料（不在目录中）
TPS389018DSET
✅ 直接替换📋 参考替代料（不在目录中）
TPS389001DSER
✅ 直接替换📋 参考替代料（不在目录中）
TPS3700DDCR
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$0.62 / 个
查看数据手册 →TPS389001DSET 规格参数
| 功能 | Voltage Supervisor / Reset IC |
| Monitored Voltage (SENSE) | As low as 1.15 V (adjustable) |
| Supply Voltage (VDD) | 1.5 V to 5.5 V |
| Threshold Accuracy | 1% (typical) |
| 静态电流 | Low (typ. single-digit uA, see datasheet) |
| 输出类型 | Open-Drain (active-low RESET) |
| Number of Channels | 1 |
| Manual Reset (MR) Input | Yes |
| Programmable Delay | Yes (CT pin, external capacitor) |
| 工作温度 | -40C to +125C |
| 封装 | 6-WSON (1.5x1.5 mm), DSE package code |
| 安装类型 | Surface Mount |
| MSL 等级 | 1 (per JEDEC J-STD-020) |
| RoHS 状态 | Compliant |
| Lead-Free | Yes |
TPS389001DSET 引脚配置
| 引脚 1 | RESET — Open-drain active-low reset output (pull-up required) |
| 引脚 2 | GND — Ground |
| 引脚 3 | CT — Programmable reset-delay capacitor connection |
| 引脚 4 | MR — Manual reset input (active-low, internal pull-up) |
| 引脚 5 | VDD — Supply voltage (1.5 V to 5.5 V) |
| 引脚 6 | SENSE — Voltage-sense input (threshold via external divider for TPS389001) |
典型应用
TPS389001DSET 适用于 6 应用s: IoT Sensor Node Power-On Reset, Wearable Health Monitor Brown-Out Detection, Industrial Sensor Module Reset Supervisor, Portable Medical Device Voltage Monitor, Smart Metering & E-Metering Reset Circuit, Home Security Sensor Hub Power Supervisor.
IoT Sensor Node Power-On Reset
The TPS389001DSET's single-digit microampere quiescent current and 1.5 V to 5.5 V supply range make it an excellent supervisor for battery-powered IoT sensor nodes running on 3.6 V Li-SOCl2 or 2x AA cells. It monitors a 1.15 V to 5 V rail derived from the battery, asserts a clean reset when the rail droops below threshold, and supports a programmable delay via the CT pin to allow the MCU PLL and crystal to stabilize before code execution. With its 6-WSON (1.5x1.5 mm) footprint it fits inside the tightest of sensor modules, including BLE beacons and LoRaWAN end devices.
推荐
Wearable Health Monitor Brown-Out Detection
Wearable health monitors (heart-rate, SpO2, continuous glucose) operate from coin-cell or Li-ion batteries where a brown-out event can corrupt firmware state. The TPS389001DSET's 1% threshold accuracy and small 6-WSON package allow it to be placed near the MCU on a flex PCB while monitoring the 1.8 V core rail. The manual reset (MR) pin doubles as a user-button input for forced reboots, and the open-drain RESET can be wired-ORed with a watchdog timer for redundant fail-safe triggering. Low quiescent current preserves weeks-to-months of battery life in always-on monitoring.
推荐
Industrial Sensor Module Reset Supervisor
Industrial sensor modules in factory-automation networks often run on 24 V rails regulated down to 3.3 V or 5 V. The TPS389001DSET monitors the post-regulator rail and asserts RESET when the input sags due to inrush on adjacent loads. The 1% threshold prevents nuisance resets during normal load steps, and the -40C to +125C operating range covers factory-floor temperatures. The 6-WSON package is footprint-compatible with the rest of the TPS3890 family, letting one PCB accept multiple threshold variants via BOM-only changes for different monitoring rails.
推荐
Portable Medical Device Voltage Monitor
Portable medical devices such as handheld ultrasound probes, ECG patches, and glucose meters require deterministic reset behavior across battery discharge curves. The TPS389001DSET holds RESET asserted until a 1.8 V or 3.3 V rail stabilizes, then releases it after a programmed CT delay so that the analog front-end and ADC calibrations complete first. Its 1% accuracy avoids false resets that would interrupt a clinical recording session, and the MSL-1 packaging supports lead-free reflow profiles typical of medical PCB assembly. The 6-WSON keeps the supervisor footprint minimal inside compact device enclosures.
推荐
Smart Metering & E-Metering Reset Circuit
Electronic meters (electricity, water, gas) operate continuously for over a decade on a single battery or supercapacitor, demanding ultra-low quiescent current and robust reset behavior across temperature. The TPS389001DSET monitors the meter's MCU rail, asserts RESET during deep brown-outs, and supports a programmable CT delay to allow the metrology ADC to power up before the MCU samples. The open-drain RESET permits wired-OR with a backup storage supervisor, giving a fail-safe signal that survives partial system faults. The 6-WSON (1.5x1.5) saves critical PCB area inside compact meter enclosures.
推荐
Home Security Sensor Hub Power Supervisor
Home security sensor hubs (door/window sensors, motion detectors, glass-break detectors) sit idle for years before being triggered, so power-conserving reset supervisors are essential. The TPS389001DSET monitors the coin-cell-derived 3.0 V or 3.3 V rail, asserts RESET only on genuine undervoltage, and its low quiescent current adds negligibly to battery drain. The MR pin can be tied to a tamper switch so that opening the enclosure forces a system reset/log entry. The miniature 6-WSON package fits inside the smallest PIR or window/door sensor form factors.
推荐
推荐产品汇总
工程参考数据： TPS389001DSET ——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 | TPS389025DSET | TPS389033DSET | TPS389018DSET | TPS389001DSER | TPS3700DDCR |
|---|---|---|---|---|---|---|
| Package | 6-WSON (1.5x1.5) DSE | 6-WSON (1.5x1.5) DSE - same | 6-WSON (1.5x1.5) DSE - same | 6-WSON (1.5x1.5) DSE - same | 6-WSON (1.5x1.5) DSE - same | SOT-23-6 (DCK) - different footprint |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Threshold Type | Adjustable (SENSE with external divider) | Fixed 2.5 V | Fixed 3.3 V | Fixed 1.8 V | Adjustable (same die) | Fixed window (multiple variants) |
| Supply Voltage Range | 1.5 V to 5.5 V | 1.5 V to 5.5 V | 1.5 V to 5.5 V | 1.5 V to 5.5 V | 1.5 V to 5.5 V | 1.5 V to 6.5 V (wider) |
| Threshold Accuracy | 1% (typical) | 1% | 1% | 1% | 1% | 1% |
| Output Type | Open-Drain (active-low) | Open-Drain (active-low) | Open-Drain (active-low) | Open-Drain (active-low) | Open-Drain (active-low) | Open-Drain (active-low) |
| Manual Reset (MR) Pin | Yes | Yes | Yes | Yes | Yes | No (separate part) |
| Programmable Delay (CT pin) | Yes | Yes | Yes | Yes | Yes | Yes |
| Operating Temperature Range | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C |
关键差异点
- Adjustable threshold with 1% accuracy in 6-WSON (1.5x1.5) （对比 TPS389025DSET)
- Smaller package and lower quiescent current than competing supervisors （对比 TPS3700DDCR)
- Manual reset and programmable delay combined （对比 Generic open-drain supervisor in SOT-23)
设计说明
The open-drain RESET output requires an external pull-up resistor (typically 10 kohm to 100 kohm) tied to a valid logic rail. Failure to add a pull-up results in an undefined high-Z output state and the downstream MCU may not see a reset event. Choose the pull-up resistor value carefully so the RC time constant at RESET does not slow the rising edge below the downstream MCU's reset-input minimum pulse requirement.
Place the CT delay-setting capacitor as close as possible to the CT pin, with a short, direct trace to the GND pin of the IC. Long CT traces introduce stray capacitance that shifts the programmed reset delay away from the value calculated from the datasheet formula tD = k * CCT. Keep analog ground (GND pin) separate from noisy digital returns where the board split permits, to prevent ground bounce from corrupting the precision SENSE comparator.
The SENSE input is high impedance and sensitive to noise on the monitored rail. Add a small ceramic bypass capacitor (100 nF to 1 uF) close to the SENSE pin for adjustable variants, and use a low-impedance resistor divider (total impedance in the 100 kohm range or less) so leakage does not bias the threshold. Avoid routing SENSE near switching-node traces to prevent false RESET assertions during high-di/dt events in adjacent converter stages.
For the TPS389001 adjustable variant, select external divider resistors with 1% or better tolerance, and use a divider current substantially above the SENSE pin leakage to maintain 1% threshold accuracy. Estimated: with a 100 kohm / 100 kohm divider at VOUT 3.3 V, the divider draws 33 uA, which is well below the supervisor's quiescent current and negligible in battery budget, while achieving 0.1% divider-induced error.
合规信息
RoHS-compliant and lead-free per Texas Instruments product page. Not AEC-Q100 qualified for automotive - use an automotive-graded supervisor variant for AEC-Q100 requirements. Halogen-free status not explicitly listed in the verified web data.
