TPS3711 - 36V Voltage Detector, 400mV Ref | Texas Instruments
N.º de pieza: TPS3711 ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $0.95 | $0,95 |
| 10 | $0.86 | $8,60 |
| 100 | $0.65 | $65,00 |
| 500 | $0.52 | $260,00 |
| 1.000 | $0.42 | $420,00 |
TPS3711 Descripción general
A voltage detector, also called a voltage supervisor or reset IC, monitors a supply voltage and asserts a signal when the monitored rail falls below a preset threshold. It belongs to the supervisory circuit family within power management ICs, a sub-category of semiconductor voltage regulators and system-protection devices. Voltage detectors are essential in processor-based systems, where they hold the MCU in reset until the rail is stable, preventing erratic operation during power-up and brown-out events.
Key features include an open-drain output rated to 25 V for flexible level translation to any logic rail, a built-in hysteresis window that provides noise immunity, and low quiescent current that suits battery-powered designs. The wide supply range of 1.8 V to 36 V allows the TPS3711 to monitor 3.3 V, 5 V, 12 V, 24 V, and 36 V industrial rails directly.
Technically, the device uses a precision bandgap reference and comparator. The monitored voltage is set with an external resistor divider on the SENSE pin, giving a fully adjustable trip point. OUT is driven low when SENSE drops below the negative threshold and goes high when the voltage recovers. The open-drain output requires an external pull-up resistor.
Typical applications include undervoltage detection in industrial control systems, 12 V/24 V/36 V rail monitoring in automotive and telecom equipment, and portable device battery supervision.
When designing with the TPS3711, size the resistor divider for the desired threshold, account for hysteresis to avoid chatter, and decouple the SENSE pin with a small capacitor to reject fast transients.
Alternativas directas para TPS3711 — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
TPS3702DDCR
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
TPS3703DDCR
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
TPS3840PL33DBZR
⚡ Mismo encapsulado ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
TPS3839K33DBZR
⚡ Mismo encapsulado ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
TPS3711 Especificaciones
| Función | Undervoltage detector (comparator + precision reference) |
| Supply Voltage Range | 1.8 V to 36 V |
| Threshold Voltage (VIT-) | 400 mV |
| Threshold Accuracy | 0.75% over temperature |
| Hysteresis | Built-in (internal) |
| Tipo de salida | Open-drain / open-collector |
| Output Voltage Rating | 25 V (max on OUT) |
| Number of Monitored Channels | 1 |
| Threshold Type | Adjustable (external resistor divider on SENSE) |
| Rango de temperatura de funcionamiento | -40C to +125C |
| Encapsulado | SOT-23-6 (SOT-6, DDC) |
| Tipo de montaje | Surface Mount |
| Estado RoHS | Compliant |
| Datasheet Revision | SBVS272A (November 2015, revised September 2018) |
Configuración de pines de TPS3711
| Pin 1 | SENSE — Comparator input for externally-set threshold via resistor divider |
| Pin 2 | GND — Ground reference |
| Pin 3 | OUT — Open-drain output, rated to 25 V, requires pull-up resistor |
| Pin 4 | NC — No internal connection |
| Pin 5 | NC — No internal connection |
| Pin 6 | VDD — Supply voltage, 1.8 V to 36 V |
Aplicaciones típicas
TPS3711 es adecuado para 6 aplicacións: Industrial 24V Rail Monitoring, Automotive 12V Battery Supervision, Telecom 36V Power Supply Health Check, Portable and Battery-Powered Devices, MCU Reset Supervision in Industrial Control, Server and Storage Power Rail Fault Detection.
Industrial 24V Rail Monitoring
The TPS3711's 1.8 V to 36 V supply range allows direct connection to 24 V industrial buses without pre-regulation, while the 400 mV reference with 0.75% accuracy over -40C to +125C gives a precise adjustable trip point via an external resistor divider on SENSE. Placed between the raw bus and the logic domain, the open-drain OUT (rated to 25 V) asserts a fault/reset signal through a pull-up to the controller logic rail, enabling safe PLC brown-out handling. The built-in hysteresis prevents chattering near the threshold during bus dips.
Recomendado
Automotive 12V Battery Supervision
For automotive electronics, the TPS3711 monitors 12 V battery rails with its wide 36 V-capable supply, handling load-dump adjacent transients and cold-crank undervoltage conditions. The 0.75% threshold accuracy over the full -40C to +125C junction range meets the precision needed for early warning of battery sag, and the open-drain output level-translates cleanly to 3.3 V or 5 V MCU reset inputs. Low quiescent current suits always-on body-control modules where the detector must not drain the battery when the vehicle is off.
Recomendado
Telecom 36V Power Supply Health Check
The TPS3711 monitors negative-riding or high-density 36 V telecom intermediate buses directly, since its supply range tops out at 36 V and the SENSE divider scales any rail to the 400 mV reference. In a hot-swap or ORing front end, OUT gates the enable of downstream converters so switching regulators never start on a sagging input, protecting DC/DC stages from brown-out misbehavior. Built-in hysteresis ensures a clean single assertion per fault event even with significant ripple on the monitored bus.
Recomendado
Portable and Battery-Powered Devices
In battery-operated products, the TPS3711 acts as a low-power battery-low detector: its adjustable SENSE threshold can be set near the cell cutoff voltage, and its low quiescent current preserves standby battery life. The open-drain output pulls low when the pack depletes below the programmed threshold, warning the MCU to save state or disable high-current loads. Operation down to 1.8 V supply means the detector remains alive on nearly empty single-cell configurations, and the tiny SOT-23-6 footprint fits compact portable PCBs.
Recomendado
MCU Reset Supervision in Industrial Control
As a supervisor/reset IC, the TPS3711 holds a microcontroller in reset until its supply stabilizes, then releases OUT when the SENSE divider indicates a healthy rail. The 400 mV reference and 0.75% accuracy guarantee repeatable reset thresholds across lot and temperature variation, which is critical for factory automation uptime. The wide 1.8 V to 36 V range lets one detector design cover 3.3 V, 5 V, and 24 V-powered controller variants, and built-in hysteresis eliminates the reset-toggle behavior seen in hysteresis-free comparators during slow power ramps.
Recomendado
Server and Storage Power Rail Fault Detection
In data-center power trees, the TPS3711 provides an inexpensive per-rail undervoltage flag for 12 V distribution feeding VRMs. Its 36 V supply rating covers 12 V and legacy 24 V backplane domains, and the 25 V open-drain output interfaces to a hot-swap controller or FPGA health-monitoring GPIO via a pull-up. The adjustable threshold lets fleet designers set precise guard-bands (for example, trip at 10.8 V on a 12 V rail) to catch PSU degradation early, while hysteresis prevents false alarms from transient load steps.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para TPS3711 — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | TPS3702DDCR | TPS3703DDCR | TPS3840PL33DBZR |
|---|---|---|---|---|
| Package | SOT-23-6 (DDC) | SOT-23-6 (DDC) - same | SOT-23-6 (DDC) - same | SOT-23 (DBZ) - different |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Supply Voltage Range | 1.8 V to 36 V | 1.8 V to 36 V | 1.8 V to 36 V | up to 40 V input |
| Threshold Reference | 400 mV internal | adjustable SENSE, 0.7% accuracy | adjustable SENSE | fixed 3.3 V threshold |
| Output Type | Open-drain, 25 V rated | Open-drain | Open-drain | Open-drain reset output |
| Detection Focus | Undervoltage | Undervoltage/overvoltage window options | Overvoltage-focused variant | Undervoltage (fixed threshold) |
| Operating Temperature | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C |
Diferenciadores clave
- 36 V supply rating in a 6-pin SOT-23 package (frente a TPS3839K33DBZR)
- Adjustable threshold via 400 mV reference (frente a TPS3840PL33DBZR)
- Newer TPS3702 offers lower current with same footprint (frente a TPS3702DDCR)
Notas de diseño
The OUT pin is open-drain and will never go high without an external pull-up resistor to the desired logic rail (up to 25 V). Use a 10 kOhm to 100 kOhm pull-up sized for the required rise time. Forgetting the pull-up is the most common TPS3711 integration error and produces an output stuck at ground that is easily misdiagnosed as a failed device.
Size the SENSE resistor divider with consideration of total threshold error: the internal reference contributes only 0.75%, but 1% divider resistors can dominate the budget. Use 0.5% or 0.1% resistors for precision trip points, and keep the divider impedance below roughly 500 kOhm total to avoid leakage-induced error. Add a small ceramic capacitor (approximately 1 nF) directly at the SENSE pin to filter fast transients without significantly delaying response.
Decouple VDD with a 0.1 uF ceramic capacitor placed as close as possible to pin 6, especially when sharing a noisy 12 V or 24 V industrial bus. The built-in hysteresis provides noise immunity at the comparator, but supply-level transients above the hysteresis window can still chatter the output on long shared buses; a series resistor plus local capacitor on VDD mitigates this.
Información de cumplimiento
RoHS compliant per TI product listing. AEC-Q100 qualification and REACH status not stated in the retrieved data; verify on the TI product page for TPS3711.
