TPS3808
TPS3808 is Programmable-Delay Supervisory Circuit manufactured by Texas Instruments.
Features
- Power-on reset generator with adjustable delay time: 1.25 ms to 10 s
- Very low quiescent current: 2.4 μA typical
- High threshold accuracy: 0.5% typical
- Fixed threshold voltages for standard voltage rails from 0.9 V to 5 V and adjustable voltage down to 0.4 V are available
- Manual reset ( MR) input
- Open-drain RESET output
- Temperature range:
- 40°C to 125°C
- Small SOT-23 and 2-mm × 2-mm WSON packages
2 Applications
- DSP or microcontroller applications
- Notebook and desktop puters
- PDAs and hand-held products
- Portable and battery-powered products
- FPGA and ASIC applications
1.2 V
3.3 V
SENSE VDD TPS3808G12
RESET CT GND
SENSE VDD
TPS3808G33
MR RESET
CT GND
VI/O VCORE DSP
GPIO GND
3 Description
The TPS3808 family of microprocessor supervisory circuits monitors system voltages from 0.4 V to 5 V, asserting an open-drain RESET signal when the SENSE voltage drops below a preset threshold or when the manual reset ( MR) pin drops to a logic low. The RESET output remains low for the user-adjustable delay time after the SENSE voltage and manual reset ( MR) return above the respective thresholds.
The TPS3808 device uses a precision reference to achieve 0.5% threshold accuracy for VIT ≤ 3.3 V. The reset delay time can be set to 20 ms by disconnecting the CT pin, 300 ms by connecting the CT pin to VDD using a resistor, or can be user-adjusted between 1.25 ms and 10 s by connecting the CT pin to an external capacitor. The TPS3808 device has a very low typical quiescent current of 2.4 μA, so it is wellsuited to battery-powered applications. It is available in the SOT-23 and 2-mm × 2-mm WSON packages, and is fully specified over a temperature range of
- 40°C to 125°C (TJ).
Device Information
PART NUMBER
PACKAGE(1)
BODY SIZE (NOM)
SOT-23 (6) WSON (6)
2.90 mm x 1.60 mm 2.00 mm x 2.00 mm
(1) For all available packages, see the orderable addendum at the end of the data sheet.
-40°C
25°C...
