Specifications
| Type | Description |
|---|---|
| Part Number | TPS3828 |
| Manufacturer | Texas Instruments |
| Product Type | LDO Regulator |
| Category | Power Management |
| Package / Case | SOT-23 (DBV), 5 pins, 2.90 mm × 1.60 mm nominal body |
| Component Type | Power_IC |
| Function | Voltage monitor/supervisor with watchdog timer; TPS3828 includes watchdog and manual reset |
| Reset Output Type | Open-drain active-low RESET |
| Manual Reset Input | Supported; MR pin present |
| Watchdog Timer Input | Supported; WDI pin present |
| Power-On Reset Delay Time | 200 ms |
| Watchdog Timeout Option | 1.6 s |
| Supply Voltage Supervision Range | 2.5 V, 3 V, 3.3 V, 5 V fixed sense threshold options |
| Typical Supply Current | 15 µA; WDI, MR and outputs unconnected |
| Maximum Supply Current | 25 µA; WDI, MR and outputs unconnected |
| Supply Voltage Operating Range | 1.1 V min, 5.5 V max |
| Operating Free-Air Temperature | -40°C to 85°C; TPS382x except TPS3823A-33 |
| Storage Temperature Range | -65°C to 150°C |
| Absolute Maximum VDD Voltage | -0.3 V to 6 V |
| Absolute Maximum RESET, MR, WDI Voltage | -0.3 V to VDD + 0.3 V |
| Maximum Low Output Current IOL | -5 mA to 5 mA |
| Maximum High Output Current IOH | -5 mA to 5 mA |
| Output Clamp Current IOK | -10 mA to 10 mA; VO < 0 or VO > VDD |
| HBM ESD Rating | ±2000 V; ANSI/ESDA/JEDEC JS-001 |
| CDM ESD Rating | ±500 V; JEDEC JESD22-C101 |
| High-Level Input Voltage VIH | 0.7 × VDD min; MR and WDI inputs |
| Low-Level Input Voltage VIL | 0.3 × VDD max; MR and WDI inputs |
| Input Transition Rise/Fall Rate | 100 ns/V max; MR or WDI |
| Junction-to-Ambient Thermal Resistance RθJA | 185 °C/W; DBV SOT-23, 5 pins |
| Junction-to-Case Top Thermal Resistance RθJC(top) | 83.3 °C/W; DBV SOT-23, 5 pins |
| Junction-to-Board Thermal Resistance RθJB | 52.4 °C/W; DBV SOT-23, 5 pins |
| Junction-to-Top Characterization Parameter ψJT | 20.4 °C/W; DBV SOT-23, 5 pins |
| Junction-to-Board Characterization Parameter ψJB | 52.0 °C/W; DBV SOT-23, 5 pins |
| Power-Up Reset Voltage VPOR | 0.9 V max; VOL(max)=0.4 V, IOL(sink)=20 µA, tr VDD ≥ 15 µs/V |
| Negative-Going Input Threshold Voltage VIT- for TPS382x-25 | 2.20 V min, 2.25 V typ, 2.30 V max; TA=-40°C to 85°C |
| Negative-Going Input Threshold Voltage VIT- for TPS382x-30 | 2.57 V min, 2.63 V typ, 2.69 V max; TA=-40°C to 85°C |
| Negative-Going Input Threshold Voltage VIT- for TPS382x-33 | 2.86 V min, 2.93 V typ, 3.00 V max; TA=-40°C to 85°C |
| Negative-Going Input Threshold Voltage VIT- for TPS382x-50 | 4.46 V min, 4.55 V typ, 4.64 V max; TA=-40°C to 85°C |
| VDD Input Hysteresis VHYS for TPS382x-25/-30/-33 | 30 mV typ |
| VDD Input Hysteresis VHYS for TPS382x-50 | 50 mV typ |
| Average High-Level Input Current IIH(AV) | 120 µA typ; WDI=VDD, time average DC=88% |
| Average Low-Level Input Current IIL(AV) | -15 µA typ; WDI=0.3 V, VDD=5.5 V, time average DC=12% |
| WDI High-Level Input Current IIH | 140 µA typ, 190 µA max; WDI=VDD |
| MR High-Level Input Current IIH | -40 µA typ, -60 µA max; MR=0.7 × VDD, VDD=5.5 V |
| WDI Low-Level Input Current IIL | 140 µA typ, 190 µA max; WDI=0.3 V, VDD=5.5 V |
| MR Low-Level Input Current IIL | -110 µA typ, -160 µA max; MR=0.3 V, VDD=5.5 V |
| RESET Output Short-Circuit Current IOS for TPS382x-25/-30/-33 | -400 µA typ; VDD=VIT-,max+0.2 V, VO=0 V |
| RESET Output Short-Circuit Current IOS for TPS382x-50 | -800 µA typ; VDD=VIT-,max+0.2 V, VO=0 V |
| MR Internal Pullup Resistor RMR | 90 kΩ typ |
| Input Capacitance Ci | 5 pF typ; MR and WDI, VI=0 V to 5.5 V |
| Pin 1 | RESET; active-low reset output |
| Pin 2 | GND |
| Pin 3 | MR; manual reset input |
| Pin 4 | WDI; watchdog timer input |
| Pin 5 | VDD; supply voltage and monitored voltage |
| Datasheet Status | request_only |
Product Overview
TPS3828 is a Texas Instruments voltage monitor/supervisor with watchdog timer functionality for Power_Management applications. Within the TPS382x family, TPS3828 includes both watchdog and manual reset functions, using a WDI pin for watchdog input and an MR pin for manual reset input.
The reset output is an open-drain active-low RESET output. The device supports fixed supervision options for 2.5 V, 3 V, 3.3 V, and 5 V rails, with negative-going threshold values specified for TPS382x-25, -30, -33, and -50 variants. Typical VDD input hysteresis is 30 mV for the 2.5 V, 3 V, and 3.3 V versions, and 50 mV for the 5 V version.
TPS3828 is supplied in a DBV SOT-23 5-pin package with RESET, GND, MR, WDI, and VDD pins. Recommended operation covers 1.1 V to 5.5 V and -40°C to 85°C, with a 200 ms power-on reset delay and 1.6 s watchdog timeout option.
Key Features
- Voltage monitor/supervisor with watchdog timer function
- Open-drain active-low RESET output
- Manual reset input through MR pin
- Watchdog timer input through WDI pin
- 200 ms power-on reset delay
- 1.6 s watchdog timeout option
- Fixed 2.5 V, 3 V, 3.3 V, 5 V supervision
- 1.1 V to 5.5 V operating supply range
- 15 µA typical supply current condition
- DBV SOT-23 5-pin package
Typical Applications
- 2.5 V rail supervision
- 3 V rail supervision
- 3.3 V rail supervision
- 5 V rail supervision
- Watchdog-monitored reset circuits
- Manual reset input circuits
- Open-drain reset output designs
- Low-current power supervision
Procurement Notes
When requesting a quote for TPS3828, 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 type of device is the TPS3828?
TPS3828 is a Texas Instruments voltage monitor/supervisor with watchdog timer functionality. The extracted device comparison identifies TPS3828 as including watchdog and manual reset support, with WDI and MR pins present.
What reset output does TPS3828 provide?
TPS3828 provides an open-drain active-low RESET output. In the DBV package pinout, pin 1 is RESET and is identified as the active-low reset output.
What supply range is specified for TPS3828 operation?
The recommended operating supply voltage range is 1.1 V minimum to 5.5 V maximum. The operating free-air temperature range is -40°C to 85°C for the applicable TPS382x devices.
What watchdog and reset timing values are listed?
The extracted timing facts list a 200 ms power-on reset delay for TPS3828 and a 1.6 s watchdog timeout option for TPS3823, TPS3824, and TPS3828 devices.
What pins are used on the TPS3828 DBV package?
The TPS3828 DBV SOT-23 package uses pin 1 for RESET, pin 2 for GND, pin 3 for MR, pin 4 for WDI, and pin 5 for VDD, which is the supply and monitored voltage pin.
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.