TPS3711DDCR - 36V Wide-Supply Voltage Detector | Texas Instruments
MPN: TPS3711DDCR ✓ Hoạt độngTPS3711DDCR Tóm tắt
What is a voltage supervisor (also called a voltage detector or reset IC)? A voltage supervisor is a power-management IC that continuously monitors a supply rail and asserts a reset or fault signal when the rail falls outside a programmed window. Supervisors sit hierarchically under power management ICs, alongside LDOs, DC-DC converters, and battery monitors. They are essential building blocks in microcontrollers, SoCs, and FPGA-based systems, where brown-outs or power-rail glitches can cause latch-up, memory corruption, or undefined logic states.
Key features include a wide 1.8 V to 36 V operating range, internal 400 mV ±1.5% reference, open-drain output capable of pulling to 25 V, low quiescent current in the microamp range, and a small SOT-23-6 footprint. The TPS3711 uses OUT driven low when the voltage at the SENSE pin drops below the negative threshold and returns high when SENSE recovers, giving designers a clean logic-level reset signal with a known pull-up reference.
The TPS3711DDCR uses a precision analog comparator with an internal bandgap-derived 400 mV reference. The open-drain output stage allows the reset signal to be pulled up to any voltage up to 25 V, independent of the device supply, which is essential for interfacing low-voltage MCUs to higher-voltage rails. The SOT-23-THIN package provides a compact footprint while maintaining industrial -40°C to +125°C operating range.
Typical applications include industrial PLCs and process controllers, automotive body and infotainment modules, battery management systems, microcontroller brown-out detection, and overvoltage/undervoltage protection in 12 V and 24 V industrial buses. The wide supply range is particularly valuable for 24 V industrial systems where traditional 5 V-only supervisors cannot operate directly from the bus.
When designing with the TPS3711, select the external resistor divider so that the sensed voltage equals 400 mV at the desired threshold. A 100 kΩ to 1 MΩ total resistance keeps quiescent current low without making the SENSE pin noise-sensitive. Always pull OUT up to a valid logic rail through a resistor; do not leave it floating.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
Bộ thay thế dễ dàng lắp đặt cho TPS3711DDCR — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với TPS3711DDCR (cùng hình factor và footprint) — khác nhau ở MSL Level, Operating Temperature Range, Output Type.
TPS3711DDCT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
TPS3700DDCR
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →TPS3702AX33DDCR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MAX16054
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ADM8339
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
TPS3711DDCR Thông số kỹ thuật
| Cấu trúc | Voltage Detector / Supervisor |
| Number of Supervisors Monitored | 1 |
| Kiểu đầu ra | Open-Drain / Open-Collector |
| Supply Voltage Range | 1.8 V to 36 V |
| Monitored Voltage (SENSE) Threshold | 400 mV (internal reference) |
| Open-Drain Output Voltage Rating | 25 V (max pull-up) |
| Khoảng nhiệt độ hoạt động | -40°C to +125°C |
| Hộp | SOT-23-THIN (DDC), 6 pins |
| Kiểu lắp đặt | Surface Mount |
| Cấp MSL | 1 (unlimited) |
| Trạng thái RoHS | Compliant |
| Lead-Free | Yes |
Cấu hình chân TPS3711DDCR
| Chân 1 | OUT — Open-drain comparator output; pull-up to logic rail through external resistor |
| Chân 2 | GND — Ground reference |
| Chân 3 | SENSE — Voltage sense input; connect to external resistor divider |
| Chân 4 | NC — Not connected (per datasheet) |
| Chân 5 | VDD — Supply voltage input, 1.8 V to 36 V |
| Chân 6 | EPAD — Exposed thermal pad; tie to GND for optimal thermal dissipation |
Ứng dụng tiêu biểu
TPS3711DDCR phù hợp cho 6 Áp dụngs: Industrial 24V PLC Brown-Out Detection, Automotive 12V Battery Monitoring, Microcontroller Brown-Out Reset, Battery Management System Cell Monitoring, Overvoltage Protection in 12V Industrial Buses, Power-Supply Voltage Monitoring.
Industrial 24V PLC Brown-Out Detection
The TPS3711DDCR's 1.8 V to 36 V supply range lets it operate directly from a 24 V industrial bus without pre-regulation, simplifying PLC power-supply design. With an external resistor divider, the SENSE pin can be set to assert OUT low when the 24 V bus sags below 21 V (typical PLC hold-up threshold). The 25 V-rated open-drain output can pull directly into a 3.3 V MCU reset pin via a 10 kΩ pull-up, providing a clean logic-level reset during brown-out events that would otherwise cause undefined MCU behavior.
Được đề xuất
Automotive 12V Battery Monitoring
In automotive body and infotainment systems, the TPS3711DDCR monitors the 12 V battery rail for undervoltage during engine cranking. The internal 400 mV reference combined with an external divider (e.g., 100 kΩ and 4.7 kΩ) sets the detection threshold around 9 V, well below the typical 10.5 V cranking sag. The -40°C to +125°C operating range covers the full automotive temperature window, and the SOT-23-6 footprint saves board space in tight ECU layouts. Note: this part is not AEC-Q100 qualified - for full automotive-grade designs, consider a Q-qualified alternative.
Được đề xuất
Microcontroller Brown-Out Reset
The TPS3711DDCR provides a hardware reset signal to MCUs running on 3.3 V or 5 V rails, ensuring clean startup when power is applied and recovery from brown-out conditions. The wide 1.8 V to 36 V supply range means the same part can monitor a 3.3 V core rail or a 12 V intermediate bus without modification. The open-drain output with external pull-up integrates directly with any MCU reset input, and the internal hysteresis prevents output chatter when the rail voltage hovers near the threshold.
Được đề xuất
Battery Management System Cell Monitoring
In multi-cell Li-ion battery packs, the TPS3711DDCR monitors individual cell voltages via an external divider chain. The 36 V supply range accommodates 7-10 cell packs directly, and the 400 mV reference can be scaled per cell using precise resistor dividers. The microamp quiescent current is critical for battery-powered systems to avoid draining cells during storage. The open-drain OUT allows multiple TPS3711 devices to wire-OR into a single MCU fault input, simplifying pack-level fault aggregation.
Được đề xuất
Overvoltage Protection in 12V Industrial Buses
For 24V or 12V industrial field-bus systems subject to transients and load-dump events, the TPS3711DDCR can be configured as an overvoltage detector by adjusting the resistor divider ratio. The 36 V absolute-max supply allows the device to survive overvoltage transients directly, and the open-drain output can drive a crowbar FET or relay to disconnect downstream loads. The 1.5% reference accuracy ensures predictable trigger thresholds across production units, critical for safety-rated systems.
Được đề xuất
Power-Supply Voltage Monitoring
Switching power supplies and isolated DC-DC converters benefit from secondary-side voltage supervision using the TPS3711DDCR. The wide input range accommodates various intermediate bus voltages (12 V, 15 V, 24 V) without requiring a separate auxiliary supply rail. The internal comparator's small propagation delay enables fast response to output-voltage collapse, protecting downstream ASICs and FPGAs from undervoltage-induced latch-up. The SOT-23-6 footprint suits space-constrained POL modules and brick-style converters.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho TPS3711DDCR — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | TPS3711DDCT | TPS3700DDCR | TPS3702AX33DDCR | MAX16054 | ADM8339 |
|---|---|---|---|---|---|---|
| Package | SOT-23-6 (DDC) | SOT-23-6 (DDC) - same | SOT-23-6 (DDC) - same | SOT-23-6 (DDC) - same | SOT-23-6 (DDC) - same | SOT-23-6 (DDC) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Maxim Integrated | Analog Devices |
| Supply Voltage Range | 1.8 V to 36 V | 1.8 V to 36 V | 1.8 V to 36 V | 1.8 V to 36 V | 2.5 V to 5.5 V | 1.0 V to 5.5 V |
| Output Type | Open-Drain | Open-Drain | Open-Drain | Open-Drain | Open-Drain | Open-Drain |
| Threshold Setting | Adjustable via external divider (400 mV internal reference) | Adjustable via external divider (400 mV internal reference) | Adjustable via external divider (400 mV internal reference) | Fixed 3.3 V threshold (factory-trimmed) | Fixed factory-trimmed threshold | Adjustable via external divider |
| Number of Channels | 1 | 1 | 1 (window detection) | 1 | 1 | 2 (dual rail) |
| Open-Drain Pull-up Voltage Rating | 25 V | 25 V | 25 V | 25 V | 5.5 V | 5.5 V |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +85°C | -40°C to +125°C |
Bảo phân biệt quan trọng
- Widest supply voltage range in SOT-23-6 supervisor class (vsMAX16054)
- Adjustable threshold via simple resistor divider (vsTPS3702AX33DDCR)
- Higher open-drain pull-up voltage rating (vsADM8339)
Ghi chú thiết kế
Do not leave the OUT pin floating - the open-drain architecture requires an external pull-up resistor (typically 10 kΩ to 100 kΩ) tied to a valid logic rail up to 25 V. Also ensure the SENSE pin resistor divider total resistance is between 100 kΩ and 1 MΩ: too low draws excessive current from the monitored rail, too high makes the SENSE pin noise-sensitive. For 24 V bus monitoring, use 1 MΩ total to keep quiescent current under 25 µA.
Place the TPS3711DDCR close to the monitored voltage source to minimize ground-bounce and SENSE-pin trace noise. Use a 0.1 µF decoupling capacitor on VDD placed within 5 mm of pin 5, and tie the exposed pad (pin 6) to a solid ground pour to improve thermal dissipation. Avoid routing noisy switching signals near the SENSE pin to prevent false triggering. The SOT-23-6 (DDC) package has 0.95 mm pitch - follow JEDEC SOT-23 land pattern for reliable reflow.
Estimated: at 36 V supply and unloaded OUT, the TPS3711 draws microamp-level quiescent current; total dissipation is well under 1 mW and self-heating is negligible. The SOT-23-6 (DDC) thermal resistance (θJA) is approximately 200°C/W on a 1 oz copper JEDEC test board. Junction temperature rise above ambient is therefore well below 1°C in normal operation. No heatsinking required for this part class.
Thông tin tuân thủ
RoHS and REACH compliant per TI product page; not AEC-Q100 qualified (use Q-suffix variant for automotive). Lead-free (Pb-free) reflow compatible per JEDEC J-STD-020.
