Transcript 10c EMT212 REGULATORS-TERMINOLOGY

EMT 212
ANALOG ELECTRONICS
Professor Robert T Kennedy
Prof. R T Kennedy
USER
DESIGNER
Knowledge of Specifications
Translate Specification
Ability to Specify
Decisions:
How to Achieve it
Topology:
(Linear/Switching/Resonant/0ther)
Discontinuous/Continuous Current
Control Strategy:
(Vo ltage /Current Mode)
Evaluate & Test
Design Iteration
USE IT
Prof. R T Kennedy
OUTPUT VOLTAGE RANGE
Vout max
range
Vout nom
Vout min
maximum-minimum band about nominal value
OUTPUT VOLTAGE ERROR BAND
Prof. R T Kennedy
OUTPUT VOLTAGE ACCURACY
Vo  Vo(nom)
Vo(acc) 
Vo(nom)
maximum deviation
operational output voltage – specified nominal
Vo measured output voltage
nominal input voltage and rated load current
OUTPUT VOLTAGE TOLERANCE
Prof. R T Kennedy
LINE REGULATION
LINE REGULATION 
Vo(high in) Vo(low in)
Vo(nom)
CHANGE IN OUTPUT VOLTAGE
due to
SPECIFIED CHANGE IN INPUT VOLTAGE
at
SPECIFIED LOAD CURRENT and TEMPERATURE
SOURCE or VOLTAGE EFFECT
Prof. R T Kennedy
LOAD REGULATION
LOAD REGULATION 
Vo(high load ) Vo(low load )
Vo( full  load )
CHANGE IN OUTPUT VOLTAGE
due to
SPECIFIED CHANGE IN LOAD CURRENT
at
SPECIFIED INPUT VOLTAGE and TEMPERATURE
LOAD EFFECT
Prof. R T Kennedy
PARD
PERIODIC and RANDOM DEVIATION
LINE RIPPLE
VOUT
SWITCHING RIPPLE
LINE & SWITCHING RIPPLE
PERIODIC rms or peak-peak
AC EFFECTS
SWITCHING TRANSIENTS
RANDOM
peak-peak
Prof. R T Kennedy
DROPOUT VOLTAGE
minimum input-to-output voltage differential
for regulation by the regulator.
VOUT = 5 V
VDO
= 0.3 V
VINmin = 5.3 V
Prof. R T Kennedy
GROUND CURRENT
the portion of regulator supply current
that flows to ground instead of to load
Prof. R T Kennedy
QUIESCENT CURRENT
current used by the regulator
for housekeeping
Prof. R T Kennedy
PROTECTION
OVERTEMPERATURE SHUTDOWN
disables the output when the regulator
temperature rises above a safe threshold
OVERVOLTAGE SHUTDOWN
disables the output when the input
voltage rises above a certain threshold
Prof. R T Kennedy