TPS3801L30DCKRG4 - 2.64V Voltage Supervisor SC-70-5 | TI
料号： TPS3801L30DCKRG4 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $1.48 | $1.48 |
| 10 | $1.33 | $13.30 |
| 100 | $1.04 | $104.00 |
| 500 | $0.84 | $420.00 |
| 1,000 | $0.65 | $650.00 |
| 3,000 | $0.48 | $1,440.00 |
TPS3801L30DCKRG4 概述
A voltage supervisor (also called a reset IC or power-on reset supervisor) is a power-management device that holds a host processor in reset until the supply rail is stable and within tolerance. Voltage supervisors sit in the hierarchy below LDOs and DC-DC converters, ensuring that downstream processors do not execute code or access peripherals at indeterminate logic levels during power-up, brown-out, or transient dropout events. The TPS3801L30DCKRG4's push-pull active-low RESET output makes it directly compatible with CMOS logic inputs on most DSPs and microcontrollers without needing an external pull-up resistor.
Key features include an ultra-low supply current of 9 µA typical, ensuring negligible load on the monitored rail. The reset output remains asserted as long as VDD is below the threshold and continues for 200 ms after VDD rises above the threshold, satisfying the reset timing requirements of most DSP and MCU families. The SC-70-5 package measures roughly 2.0 mm x 1.25 mm, making it among the smallest supervisors available. The device operates across an industrial temperature range of -40C to +85C and is qualified to TI's standard JEDEC reliability flow.
Internally, the TPS3801L30DCKRG4 uses a precision bandgap reference and comparator topology. A voltage divider and reference comparator generate the reset signal, while an internal timer block produces the 200 ms delay using an on-chip oscillator. The push-pull output stage actively drives both high and low, eliminating external pull-up components and reducing BOM count.
Typical applications include DSP/FPGA power supervision in portable and battery-powered equipment, microcontroller reset generation in industrial sensors, single-rail monitoring in handheld medical devices, and brown-out protection in IoT endpoints. The SC-70-5 footprint makes it well-suited for space-constrained designs.
When designing with this device, place it as close as possible to the IC it monitors, and route VDD through a short, wide trace to minimize voltage drop during high-current transients. Ensure the monitored rail's nominal value stays well above the 2.64V threshold with adequate margin under worst-case load.
This page synthesizes distributor pricing, SC-70-5 drop-in alternatives within the TPS380x family, and practical design notes not found in the manufacturer datasheet alone.
直接替换替代料： TPS3801L30DCKRG4 ——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：
TPS3801L30DCKR
✅ 直接替换📋 参考替代料（不在目录中）
TPS3801K33DCKRG4
✅ 直接替换📋 参考替代料（不在目录中）
TPS3801E18DCKRG4
✅ 直接替换📋 参考替代料（不在目录中）
TPS3801-01DCKRG4
✅ 直接替换📋 参考替代料（不在目录中）
TPS3802K33DCKRG4
✅ 直接替换📋 参考替代料（不在目录中）
TPS3801L30DCKRG4 规格参数
| 功能 | Supply voltage supervisor (reset generator) |
| Number of Voltages Monitored | 1 |
| Monitored Voltage (Threshold) | 2.64 V |
| Reset Output Type | Active-low, push-pull |
| Reset Delay Time | 200 ms (typical) |
| Supply Current (Quiescent) | 9 uA (typical) |
| 工作温度范围 | -40C to +85C |
| 封装 | SC-70-5 (DCK, SOT-323) |
| Package Code | DCK |
| 安装类型 | Surface Mount |
| 引脚数量 | 5 |
| MSL 等级 | 1 (unlimited) |
| RoHS 状态 | Compliant |
| Lead-Free / Halogen-Free | Yes (Pb-free, green) |
TPS3801L30DCKRG4 引脚配置
| 引脚 1 | GND — Ground reference |
| 引脚 2 | RESET — Active-low push-pull reset output |
| 引脚 3 | VDD — Monitored supply voltage input |
| 引脚 4 | NC — Not connected (per datasheet) |
| 引脚 5 | NC — Not connected (per datasheet) |
典型应用
TPS3801L30DCKRG4 适用于 6 应用s: DSP/FPGA Power Rail Supervision, Portable Battery-Powered Equipment, Industrial Sensor Nodes, IoT Endpoint Brown-Out Protection, Medical Handheld Devices, Single-Rail MCU Reset Generation.
DSP/FPGA Power Rail Supervision
The TPS3801L30DCKRG4 monitors a 3.3 V DSP or FPGA supply rail, asserting active-low RESET whenever VDD falls below 2.64 V (80% of nominal). Its 200 ms reset delay exceeds the reset-pulse-width requirement of most TI C2000 and MSP430 DSP cores, allowing the host to come up cleanly after brown-out. The 9 uA quiescent current adds negligible load to the rail it supervises, and the push-pull RESET output drives CMOS logic inputs directly without a pull-up. Place the supervisor within 10 mm of the host's RESET pin with short, wide VDD and GND traces to minimize parasitic drop during inrush.
推荐
Portable Battery-Powered Equipment
The TPS3801L30DCKRG4's 9 uA quiescent current and tiny SC-70-5 package make it well suited for handheld and battery-powered products where PCB area and Iq are critical. Used as the primary reset supervisor on a Li-ion-powered 3.3 V rail, the device draws roughly 0.003 mAh per day, a negligible fraction of typical battery capacity. The 2.64 V threshold aligns with the safe-discharge cutoff for many single-cell Li-ion systems running through an LDO. The push-pull output eliminates the pull-up resistor that would otherwise leak current during shutdown.
推荐
Industrial Sensor Nodes
Industrial 4-20 mA loop-powered or 24 V-bus sensor modules often use a 3.3 V local rail derived from a wide-Vin DC-DC. The TPS3801L30DCKRG4 supervises that local 3.3 V rail, holding the MCU in reset during input transients or DC-DC startup. Operating from -40C to +85C, the device covers the full industrial temperature range. Its push-pull active-low RESET interfaces directly to industrial MCU reset pins, and the SC-70-5 footprint fits inside miniature sensor head enclosures. The 200 ms delay also masks DC-DC soft-start transients that could otherwise trigger spurious resets.
推荐
IoT Endpoint Brown-Out Protection
In Wi-Fi or BLE IoT endpoints, brown-outs caused by TX bursts can corrupt flash or lock up the radio MCU. The TPS3801L30DCKRG4 monitors the 3.3 V rail and asserts RESET if VDD dips below 2.64 V, giving the firmware a clean recovery point. With 9 uA Iq, the supervisor adds essentially zero quiescent load to the energy budget. The 200 ms reset delay also allows the upstream DC-DC to recover fully before the host begins executing code, preventing repeated reset loops in marginal conditions.
推荐
Medical Handheld Devices
Battery-powered medical handhelds such as glucose meters, pulse oximeters, and portable diagnostic tools require reliable reset behavior to meet IEC 62304 software-safety expectations. The TPS3801L30DCKRG4's deterministic 2.64 V threshold and 200 ms reset delay provide a reproducible power-on sequence for the medical MCU. The SC-70-5 package allows the supervisor to fit alongside the host MCU in enclosures measuring only a few cubic centimeters. The push-pull RESET output drives the host without external components, reducing BOM risk in FDA-audited designs.
推荐
Single-Rail MCU Reset Generation
Simple microcontroller designs that lack internal brown-out detectors can use the TPS3801L30DCKRG4 as an external supervisor. It monitors the 3.3 V rail and asserts RESET whenever VDD falls below 2.64 V, then holds RESET low for 200 ms after recovery. This produces a well-defined reset pulse at every power-up, replacing unreliable RC-based reset circuits. The 5-pin SC-70 package saves board area versus discrete reset ICs in SOIC-8, and the push-pull output stage avoids the pull-up leakage found in open-drain supervisors.
推荐
推荐产品汇总
工程参考数据： TPS3801L30DCKRG4 ——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 | TPS3801L30DCKR | TPS3801K33DCKRG4 | TPS3801E18DCKRG4 | TPS3801-01DCKRG4 | TPS3802K33DCKRG4 |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | SC-70-5 (DCK) | SC-70-5 (DCK) - same | SC-70-5 (DCK) - same | SC-70-5 (DCK) - same | SC-70-5 (DCK) - same | SC-70-5 (DCK) - same |
| Monitored Threshold | 2.64 V | 2.64 V | 3.08 V | 1.68 V | Adjustable | 3.08 V |
| Reset Delay | 200 ms | 200 ms | 200 ms | 200 ms | 200 ms | 200 ms |
| Quiescent Current | 9 uA | 9 uA | 9 uA | 9 uA | 9 uA | 9 uA |
| Reset Output | Active-low, push-pull | Active-low, push-pull | Active-low, push-pull | Active-low, push-pull | Active-low, push-pull | Active-low, push-pull |
| Number of Rails Monitored | 1 | 1 | 1 | 1 | 1 | 1 |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| Unit Price (1 pc) | $1.48 | similar pricing | similar pricing | similar pricing | similar pricing | similar pricing |
关键差异点
- Industry-standard 2.64 V fixed threshold optimized for 3.3 V systems （对比 TPS3801K33DCKRG4)
- Same-package footprint as the entire TPS3801 and TPS3802 DCK family （对比 TPS3801-01DCKRG4)
- Drop-in pinout with identical 9 uA Iq across the family （对比 TPS3801E18DCKRG4)
设计说明
Place the TPS3801L30DCKRG4 as close as physically possible to the host MCU's RESET pin and the VDD rail it monitors. Keep VDD and GND traces short and wide (>= 0.2 mm) to minimize parasitic resistance and inductance during load transients. If the monitored rail is provided by a DC-DC converter, place the supervisor after the output capacitor and before the host MCU's decoupling capacitor, so the supervisor sees the actual voltage delivered to the host rather than the DC-DC switching node.
Do not connect the NC pins (4 and 5) to anything - they are not bonded internally and can act as antennas that inject noise into the die. Route RESET directly to the host MCU's reset input without series resistors or capacitors; the push-pull output stage does not require a pull-up, and adding capacitance slows the reset edge and may violate the host's reset-pulse-width minimum of 200 ms.
Estimated: With a 9 uA Iq and 5-pin SC-70-5 thermal resistance of approximately 330 C/W, the TPS3801L30DCKRG4 self-heating is negligible (< 0.01 C rise). Even so, provide a small ground copper pour under and around the package to give a low-impedance return path for the RESET output's transient current (a few mA during host reset).
合规信息
RoHS compliant per TI product page; Pb-free green ('G4' suffix) confirms lead-free and halogen-free construction. Not AEC-Q100 qualified - this is a commercial/industrial grade part; for automotive supervisory applications, select TPS3801-Q1 variants.
