TPS3820-Q1中文资料德州仪器数据手册PDF规格书

1 Features

• Qualified for automotive applications

• AEC-Q100 Qualified With the Following Results:

– Device temperature grade 1: –40°C to 125°C

– Device HBM ESD classification level 2

– Device CDM ESD classification level C4B

• ESD protection exceeds 2000V Per MIL-STD-883,

Method 3015; using human body model (C =

100pF, R = 1500Ω)

• Power-on reset generator with fixed delay

time of 200ms (TPS3823/4/5/8-xx-Q1) or 25ms

(TPS3820-xx-Q1)

• Manual reset input (TPS3820/3/5/8-xx-Q1)

• Reset output available in active-low

(TPS3820/3/4/5-xx-Q1), Active-High (TPS3824/5-

xx-Q1), and open drain (TPS3828-xx-Q1)

• Supply voltage supervision range:

2.5V, 3V, 3.3V, 5V

• Watchdog timer (TPS3820/3/4/8-xx-Q1)

• Supply current of 15μA (typical)

• 5-Pin SOT-23 package

• Temperature range: −40°C to 125°C

2 Applications

• Automotive DSPs, microcontrollers, or

microprocessors

• Industrial equipment

• Programmable controls

• Automotive systems

• Portable and battery-powered equipment

• Intelligent instruments

• Wireless communications systems

3 Description

For all new designs with TPS3820-xx-Q1, use the

TPS3820-xxQPDBVRQ1 part number. The TPS3820-

xxQP is functionally equivalent and a replacement to

the TPS3820xxQ. The TPS3820-xxQDBVRQ1 is not

recommended for new designs (NRND).

The TPS382x-xx-Q1 family of supervisors provide

circuit initialization and timing supervision, primarily

for DSP and processor-based systems. During power

on, RESET asserts when the supply voltage VDD

becomes greater than 1.1V. Thereafter, the supply

voltage supervisor monitors VDD and keeps RESET

active low as long as VDD remains below the

threshold voltage, VIT−. An internal timer delays the

return of the output to the inactive state (high) to

verify a proper system reset. The delay time, td, starts

after VDD 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. The TPS382xxx-

Q1 family also offers watchdog time out options of

200ms (TPS3820-xx-Q1) and 1.6s (TPS3823/4/8-xx-

Q1).