TPS3103 Datasheet, PDF (1/31 Pages) Texas Instruments – Ultralow Supply-Current Voltage Monitor With Optional Watchdog

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TPS3103, TPS3106, TPS3110
SLVS363F – AUGUST 2001 – REVISED NOVEMBER 2015
TPS3103, TPS3106, TPS3110 Ultralow Supply-Current Voltage Monitor
With Optional Watchdog
1 Features
•1 Precision Supply Voltage Supervision Range:
0.9 V, 1.2 V, 1.5 V, 1.6 V, 2 V, and 3.3 V
• High Trip-Point Accuracy: 0.75%
• Supply Current of 1.2 μA (Typical)
• RESET Defined With Input Voltages as Low as
0.4 V
• Power-On Reset Generator With a Delay Time of
130 ms
• Push/Pull or Open-Drain RESET Outputs
• Package Temperature Range: –40°C to 85°C
2 Applications
• Applications Using Low-Power DSPs,
Microcontrollers, or Microprocessors
• Portable and Battery-Powered Equipment
• Intelligent Instruments
• Wireless Communication Systems
• Industrial Equipment
• Notebook and Desktop Computers
Typical Application Schematic
3.3 V
1.6 V
V_DD
V_CORE V_IO
R3
TPS3106K33DBV
DSP
R1
MR
RSTVDD
RESET
SENSE
RSTSENSE
R2
GND
GND
GND
3 Description
The TPS310x and TPS311x families of supervisory
circuits provide circuit initialization and timing
supervision, primarily for DSP and processor-based
systems.
During power-on, RESET is asserted low when the
supply voltage (V_DD) becomes higher than 0.4 V.
Thereafter, the supervisory circuit monitors V_DD and
keeps the RESET output low as long as V_DD remains
below the threshold voltage (V_IT–). To ensure proper
system reset, after V_DD surpasses the threshold
voltage, an internal timer delays the transition of the
RESET signal from low to high for the specified time.
When V_DD drops below V_IT–, the output transitions low
again.
All the devices of this family have a fixed-sense
threshold voltage (V_IT–) set by an internal voltage
divider.
The TPS3103 and TPS3106 devices have an active-
low, open-drain RESET output and either an
integrated power-fail input (PFI) or SENSE input with
corresponding outputs for monitoring other voltages.
The TPS3110 has an active-low push/pull RESET
and a watchdog timer to monitor the operation of
microprocessors. All three devices have a manual
reset pin that can be used to force the outputs low
regardless of the sensed voltages.
The product spectrum is designed for supply voltages
of 0.9 V up to 3.3 V. The circuits are available in 6-pin
SOT-23 packages. The TPS31xx family is
characterized for operation over a temperature range
of –40°C to 85°C.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS3103xxx
TPS3106xxx
SOT-23 (6)
2.90 mm × 1.60 mm
TPS3110xxx
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.