
TPS3800-xx, TPS3801-xx, TPS3802-xx
ULTRA-SMALL SUPPLY VOLTAGE SUPERVISORS
SLVS219B – AUGUST 1999 – REVISED APRIL 2002
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POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
features
D5-Pin SC-70 (SOT-323) Package
DSupply Current of 9 µA (Typ)
DPower-On Reset Generator With Fixed
Delay Time
– TPS3800 = 100 ms
– TPS3801 = 200 ms
– TPS3802 = 400 ms
DPrecision Supply Voltage Monitor 1.8 V,
2.5 V, 2.7 V, 3 V, 3.3 V, 5 V, and Adjustable
DManual Reset Input (Except TPS3801–01)
DTemperature Range ...–40°C to 85°C
applications
DApplications Using DSPs, Microcontrollers,
or Microprocessors
DWireless Communication Systems
DPortable/Battery-Powered Equipment
DProgrammable Controls
DIntelligent Instruments
DIndustrial Equipment
DNotebook/Desktop Computers
DAutomotive Systems
description
The TPS380x family of supervisory circuits
provide circuit initialization and timing supervi-
sion, primarily for DSPs and processor-based
systems.
During power-on, RESET is asserted when the
supply voltage VDD becomes higher than 1.1 V.
Thereafter, the supervisory circuit monitors VDD
(or SENSE) and keeps RESET active as long as
VDD (or SENSE) remains below the threshold
voltage (VIT). An internal timer delays the return of
the output to the inactive state (high) to ensure
proper system reset. The delay time (td) starts
after VDD (or SENSE) has risen above the
threshold voltage (VIT). When the supply voltage
drops below the threshold voltage (VIT) the output
becomes active (low) again. No external
components are required. All the devices of this
family have a fixed sense-threshold voltage (VIT)
set by an internal voltage divider, except for the
TPS3801–01, which can be customized with two
external resistors at the SENSE input.
The TPS380x devices, except the TPS3801–01,
incorporate a manual reset input (MR). A low level
at MR causes RESET to become active.
The product spectrum is designed for supply
voltages of 1.8 V, 2.5 V, 2.7 V, 3 V, 3.3 V, and 5 V.
The circuits are available in a 5-pin SC-70
(SOT-323) package, which is only about half the
size of a 5-pin SOT-23 package.
The TPS3801–01 can monitor voltages as low as 1.14 V , depending on the configuration of the external resistor
divider.
The TPS380x devices are characterized for operation over a temperature range of –40°C to 85°C.
Copyright 2002, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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2
4
5
TPS380x . . . DCK PACKAGE
(TOP VIEW)
1
RESET
GND
MR
VDD
GND
3
2
4
5
TPS3801–01 . . . DCK PACKAGE
(TOP VIEW)
1
RESET
GND
SENSE
VDD
GND
typical applications
VDD = 1.8 V
100 nF
TPS3801E18
TMS320VC5420
GND
GND
MR RESET RESET
CVDD
VDD