Specifications
| Type | Description |
|---|---|
| Part Number | TPS3820 |
| Manufacturer | Texas Instruments |
| Product Type | LDO Regulator |
| Category | Power Management |
| Package / Case | 5-pin SOT-23 DBV, 2.90 mm × 1.60 mm nominal body |
| Component Type | Power_IC |
| Power-on Reset Delay Time | 25 ms; condition: TPS3820 |
| Watchdog Timeout | 200 ms; condition: TPS3820 |
| Reset Output Type | active-low push-pull RESET; condition: TPS3820 |
| Manual Reset Input | supported; condition: TPS3820 includes MR pin |
| Watchdog Input | supported; condition: TPS3820 includes WDI pin |
| Supply Voltage Supervision Range | 2.5 V, 3 V, 3.3 V, 5 V; condition: TPS382x family fixed threshold options |
| Recommended Supply Voltage | 1.1 V min, 5.5 V max; condition: VDD, operating free-air temperature range |
| Absolute Maximum Supply Voltage | -0.3 V min, 6 V max; condition: VDD |
| Absolute Maximum Input/Output Voltage | -0.3 V min, VDD + 0.3 V max; condition: RESET, RESET, MR, WDI pins |
| Maximum Low Output Current | -5 mA min, 5 mA max; condition: IOL absolute maximum rating |
| Maximum High Output Current | -5 mA min, 5 mA max; condition: IOH absolute maximum rating |
| Output Clamp Current | -10 mA min, 10 mA max; condition: IOK, VO < 0 or VO > VDD |
| Operating Free-Air Temperature | -40 °C min, 85 °C max; condition: TPS3820 operating range |
| Storage Temperature Range | -65 °C min, 150 °C max; condition: Tstg |
| ESD Rating HBM | ±2000 V; condition: Human-body model per ANSI/ESDA/JEDEC JS-001 |
| ESD Rating CDM | ±500 V; condition: Charged-device model per JEDEC JESD22-C101 |
| High-Level Input Voltage | 0.7 × VDD min; condition: VIH at MR and WDI |
| Low-Level Input Voltage | 0.3 × VDD max; condition: VIL at MR and WDI |
| Input Transition Rise/Fall Rate | 100 ns/V max; condition: Δt/ΔV at MR or WDI |
| Junction-to-Ambient Thermal Resistance | 185 °C/W; condition: RθJA, DBV SOT-23 5-pin package |
| Junction-to-Case Top Thermal Resistance | 83.3 °C/W; condition: RθJC(top), DBV SOT-23 5-pin package |
| Junction-to-Board Thermal Resistance | 52.4 °C/W; condition: RθJB, DBV SOT-23 5-pin package |
| Junction-to-Top Characterization Parameter | 20.4 °C/W; condition: ψJT, DBV SOT-23 5-pin package |
| Junction-to-Board Characterization Parameter | 52.0 °C/W; condition: ψJB, DBV SOT-23 5-pin package |
| Power-Up Reset Voltage | 0.9 V max; condition: VPOR, 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; condition: TPS382x-25, TA = 0 °C to 85 °C |
| Negative-Going Input Threshold Voltage | 2.20 V min, 2.25 V typ, 2.30 V max; condition: TPS382x-25, TA = -40 °C to 85 °C |
| VDD Input Hysteresis | 30 mV typ; condition: TPS382x-25, TPS382x-30, TPS382x-33, TPS382xA-33 |
| Average High-Level WDI Input Current | 120 µA typ; condition: WDI = VDD, time average, DC = 88% |
| Average Low-Level WDI Input Current | -15 µA typ; condition: WDI = 0.3 V, VDD = 5.5 V, time average, DC = 12% |
| High-Level WDI Input Current | 140 µA typ, 190 µA max; condition: WDI = VDD |
| High-Level MR Input Current | -40 µA typ, -60 µA max; condition: MR = 0.7 × VDD, VDD = 5.5 V |
| Low-Level WDI Input Current | 140 µA typ, 190 µA max; condition: WDI = 0.3 V, VDD = 5.5 V |
| Low-Level MR Input Current | -110 µA typ, -160 µA max; condition: MR = 0.3 V, VDD = 5.5 V |
| Output Short-Circuit Current | -400 µA typ; condition: RESET, TPS382x-25/30/33/A-33, VDD = VIT-,max + 0.2 V, VO = 0 V |
| Supply Current | 15 µA typ, 25 µA max; condition: IDD, WDI, MR, and outputs unconnected |
| Internal MR Pullup Resistor | 90 kΩ typ; condition: RMR at manual reset input |
| Input Capacitance | 5 pF typ; condition: Ci at MR and WDI, VI = 0 V to 5.5 V |
| Pin 1 Function | RESET active-low reset output; condition: TPS3820 DBV package top view |
| Pin 2 Function | GND ground connection; condition: TPS3820 DBV package top view |
| Pin 3 Function | MR manual-reset input; condition: TPS3820 DBV package top view |
| Pin 4 Function | WDI watchdog timer input; condition: TPS3820 DBV package top view |
| Pin 5 Function | VDD supply voltage input; condition: TPS3820 DBV package top view |
| Datasheet Status | request_only |
Product Overview
The TPS3820 is a Texas Instruments voltage supervisor with watchdog for Power_Management designs. It combines voltage supervision, a watchdog timer input, and a manual reset input with an active-low push-pull RESET output. The TPS3820-specific timing values are a 25 ms power-on reset delay and a 200 ms watchdog timeout.
The device is supplied in a 5-pin SOT-23 DBV package with a 2.90 mm × 1.60 mm nominal body. Pin functions are RESET on pin 1, GND on pin 2, MR on pin 3, WDI on pin 4, and VDD on pin 5. The recommended VDD range is 1.1 V to 5.5 V over the operating free-air temperature range of -40 °C to 85 °C.
Electrical details include fixed threshold family options for 2.5 V, 3 V, 3.3 V, and 5 V supervision, 30 mV typical VDD input hysteresis for listed threshold variants, 15 µA typical supply current, and a 90 kΩ typical internal MR pullup resistor. Thermal data for the DBV package includes 185 °C/W junction-to-ambient thermal resistance.
Key Features
- 25 ms TPS3820 power-on reset delay
- 200 ms TPS3820 watchdog timeout
- Active-low push-pull RESET output
- MR manual-reset input supported
- WDI watchdog timer input supported
- 1.1 V to 5.5 V recommended VDD range
- 2.5 V, 3 V, 3.3 V, 5 V supervision options
- 15 µA typical supply current
- 90 kΩ typical internal MR pullup resistor
- 5-pin SOT-23 DBV package
Typical Applications
- Supply voltage supervision
- Watchdog timer reset circuits
- Manual reset input circuits
- 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 TPS3820, 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 reset timing does the TPS3820 provide?
For TPS3820, the extracted datasheet facts specify a 25 ms power-on reset delay time and a 200 ms watchdog timeout. These timing values apply to the TPS3820 condition in the manufacturer technical datasheet.
What pins are included on the TPS3820 DBV package?
The TPS3820 DBV top-view pinout lists pin 1 as RESET, pin 2 as GND, pin 3 as MR, pin 4 as WDI, and pin 5 as VDD. The package is a 5-pin SOT-23 DBV.
What supply voltage range is recommended for TPS3820?
The recommended VDD supply voltage range is 1.1 V minimum to 5.5 V maximum over the operating free-air temperature range. The absolute maximum VDD rating is -0.3 V minimum to 6 V maximum.
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.