Specifications
| Type | Description |
|---|---|
| Part Number | TPS3824 |
| Manufacturer | Texas Instruments |
| Product Type | LDO Regulator |
| Category | Power Management |
| Component Type | Power_IC |
| Package / Case | 5-pin SOT-23 DBV, nominal body size 2.90 mm x 1.60 mm |
| Function | Voltage supervisor with watchdog timer |
| Power-on Reset Delay | 200 ms |
| Watchdog Timeout | 1.6 s |
| Supply Voltage Supervision Range | 2.5 V, 3 V, 3.3 V, 5 V |
| Reset Output Type | Push-pull active-low RESET and push-pull active-high RESET |
| Watchdog Input | Available |
| Manual Reset Input | Not available |
| Pin 1 Function | RESET active-low output |
| Pin 2 Function | GND |
| Pin 3 Function | RESET active-high output |
| Pin 4 Function | WDI watchdog timer input |
| Pin 5 Function | VDD supply voltage and monitored voltage input |
| Absolute Maximum VDD | -0.3 V to 6 V |
| Absolute Maximum Input/Output Voltage | -0.3 V to VDD + 0.3 V |
| Absolute Maximum Low Output Current | -5 mA to 5 mA |
| Absolute Maximum High Output Current | -5 mA to 5 mA |
| Absolute Maximum Output Clamp Current | -10 mA to 10 mA |
| Operating Free-Air Temperature | -40 °C to 85 °C |
| Storage Temperature | -65 °C to 150 °C |
| ESD Rating HBM | ±2000 V |
| ESD Rating CDM | ±500 V |
| Recommended Supply Voltage | 1.1 V min, 5.5 V max |
| High-Level Input Voltage | 0.7 x VDD min |
| Low-Level Input Voltage | 0.3 x VDD max |
| Input Transition Rise/Fall Rate | 100 ns/V max |
| Junction-to-Ambient Thermal Resistance | 185 °C/W |
| Junction-to-Case Top Thermal Resistance | 83.3 °C/W |
| Junction-to-Board Thermal Resistance | 52.4 °C/W |
| High-Level Output Voltage | 0.8 x VDD min; TPS3824-25/TPS3824-30 RESET active-high output, VDD >= 1.8 V, IOH = -100 µA |
| High-Level Output Voltage | 0.8 x VDD min; TPS3824-33/TPS3824-50 RESET active-high output, VDD >= 1.8 V, IOH = -150 µA |
| Low-Level Output Voltage | 0.4 V max; TPS3824-25/TPS3824-30 active-high RESET output, VDD = VIT- + 0.2 V, IOL = 1 mA |
| Low-Level Output Voltage | 0.4 V max; TPS3824-33 active-high RESET output, VDD = VIT- + 0.2 V, IOL = 1.2 mA |
| Low-Level Output Voltage | 0.4 V max; TPS3824-50 active-high RESET output, VDD = VIT- + 0.2 V, IOL = 3 mA |
| Low-Level Output Voltage | 0.4 V max; TPS3824 active-low RESET output, VDD = VIT- - 0.2 V; IOL = 1 mA for -25/-30, 1.2 mA for -33, 3 mA for -50 |
| Power-Up Reset Voltage | 0.9 V max; VOL max = 0.4 V, IOL sink = 20 µA |
| Negative-Going Input Threshold Voltage | 2.21 V min, 2.25 V typ, 2.30 V max; TPS3824-25, TA = 0 °C to 85 °C |
| Negative-Going Input Threshold Voltage | 2.20 V min, 2.25 V typ, 2.30 V max; TPS3824-25, TA = -40 °C to 85 °C |
| Negative-Going Input Threshold Voltage | 2.59 V min, 2.63 V typ, 2.69 V max; TPS3824-30, TA = 0 °C to 85 °C |
| Negative-Going Input Threshold Voltage | 2.57 V min, 2.63 V typ, 2.69 V max; TPS3824-30, TA = -40 °C to 85 °C |
| Negative-Going Input Threshold Voltage | 2.88 V min, 2.93 V typ, 3.00 V max; TPS3824-33, TA = 0 °C to 85 °C |
| Negative-Going Input Threshold Voltage | 2.86 V min, 2.93 V typ, 3.00 V max; TPS3824-33, TA = -40 °C to 85 °C |
| Negative-Going Input Threshold Voltage | 4.49 V min, 4.55 V typ, 4.64 V max; TPS3824-50, TA = 0 °C to 85 °C |
| Negative-Going Input Threshold Voltage | 4.46 V min, 4.55 V typ, 4.64 V max; TPS3824-50, TA = -40 °C to 85 °C |
| VDD Input Hysteresis | 30 mV typ; TPS3824-25, TPS3824-30, TPS3824-33 |
| VDD Input Hysteresis | 50 mV typ; TPS3824-50 |
| WDI Average High-Level Input Current | 120 µA typ; WDI = VDD, time average, DC = 88% |
| WDI Average Low-Level Input Current | -15 µA typ; WDI = 0.3 V, VDD = 5.5 V, time average, DC = 12% |
| WDI High-Level Input Current | 140 µA typ, 190 µA max; WDI = VDD |
| WDI Low-Level Input Current | 140 µA typ, 190 µA max; WDI = 0.3 V, VDD = 5.5 V |
| RESET Output Short-Circuit Current | -400 µA typ; TPS3824-25/-30/-33, VDD = VIT-,max + 0.2 V, VO = 0 V |
| RESET Output Short-Circuit Current | -800 µA typ; TPS3824-50, VDD = VIT-,max + 0.2 V, VO = 0 V |
| Supply Current | 15 µA typ, 25 µA max; WDI and outputs unconnected |
| Input Capacitance | 5 pF typ; WDI input, VI = 0 V to 5.5 V |
| Datasheet Status | request_only |
Product Overview
The TPS3824 is a Texas Instruments Power_Management IC for voltage supervision with watchdog timer functionality. It monitors the VDD supply and monitored voltage input while providing both push-pull active-low RESET and push-pull active-high RESET outputs. The fixed power-on reset delay is 200 ms, and the watchdog timeout option is 1.6 s through the WDI watchdog timer input.
Fixed supervision options support 2.5 V, 3 V, 3.3 V, and 5 V rails. Negative-going input thresholds are specified for TPS3824-25, TPS3824-30, TPS3824-33, and TPS3824-50 variants, with typical thresholds of 2.25 V, 2.63 V, 2.93 V, and 4.55 V respectively. VDD input hysteresis is 30 mV typical for the -25, -30, and -33 options, and 50 mV typical for the -50 option.
The device is supplied in a 5-pin SOT-23 DBV package with a nominal 2.90 mm x 1.60 mm body size. Pin functions are RESET active-low output, GND, RESET active-high output, WDI watchdog timer input, and VDD supply/monitored voltage input. Operating free-air temperature is -40 °C to 85 °C.
Key Features
- Voltage supervisor with watchdog timer function
- 200 ms fixed power-on reset delay
- 1.6 s watchdog timeout option
- 2.5 V, 3 V, 3.3 V, 5 V supervision options
- Push-pull active-low and active-high RESET outputs
- WDI watchdog timer input available
- Manual reset input not available
- Recommended VDD range from 1.1 V to 5.5 V
- -40 °C to 85 °C operating free-air temperature
- 15 µA typical supply current with outputs unconnected
Typical Applications
- Supply rail voltage supervision
- Watchdog timer reset circuits
- Processor reset generation
- 2.5 V rail monitoring
- 3 V rail monitoring
- 3.3 V rail monitoring
- 5 V rail monitoring
- Compact SOT-23 power management designs
Procurement Notes
When requesting a quote for TPS3824, buyers should confirm the manufacturer, package or case, required quantity, target date code, compliance documents, packing method, destination country and expected delivery schedule.
If alternatives are acceptable, buyers should share the approved vendor list, required electrical or optical limits, package constraints and qualification requirements. Any alternative part should be reviewed by the buyer's engineering team before production use.
For power IC and power device sourcing, voltage rating, current rating, power dissipation, package thermal performance, protection features, qualification grade and application conditions should be reviewed before approval.
FAQ
What function does the TPS3824 provide?
The TPS3824 provides voltage supervisor functionality with a watchdog timer. It monitors the VDD supply and monitored voltage input, supports fixed voltage threshold options, and provides push-pull active-low RESET and active-high RESET outputs.
What reset delay and watchdog timeout are specified?
The extracted datasheet facts specify a fixed 200 ms power-on reset delay for TPS3824 and a 1.6 s watchdog timeout option through the WDI watchdog timer input.
What package and pin functions does TPS3824 use?
TPS3824 is listed in a 5-pin SOT-23 DBV package with nominal 2.90 mm x 1.60 mm body size. The pins are active-low RESET, GND, active-high RESET, WDI watchdog input, and VDD supply/monitored voltage input.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: July 7, 2026.
This page is based on manufacturer datasheet information and LDeepAI sourcing review. Specifications should be verified against the official manufacturer datasheet before final procurement or design approval. Final electrical, optical and reliability approval should be confirmed by the buyer's engineering team.