LTC3879
4
3879f
ELECTRICAL CHARACTERISTICS
The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C. V
IN
= 15V, unless otherwise noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Internal V
CC
Regulator
Internal V
CC
Voltage 6V < V
IN
< 38V 5.15 5.3 5.45 V
Internal V
CC
Load Regulation I
CC
= 0mA to 20mA –0.1 ±2 %
PGOOD Output
PGOOD Upper Threshold V
FB
Rising 7.8 10 12.2 %
PGOOD Lower Threshold V
FB
Falling –7.8 –10 –12.2 %
PGOOD Hysteresis V
FB
Returning 2 3.8 %
PGOOD Low Voltage I
PGOOD
= 5mA 0.15 0.4 V
PGOOD Turn-On Delay 12 μs
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: T
J
is calculated from the ambient temperature T
A
and power
dissipation P
D
, as follows:
T
J
= T
A
+ (P
D
• θ
JA
)
Note 3: The LTC3879 is tested in a feedback loop that adjusts V
FB
to
achieve a specifi ed error amplifi er output voltage (I
TH
).
Note 4: The LTC3879E is guaranteed to meet specifi cations from
0°C to 85°C. Specifi cations over the – 40°C to 85°C operating temperature
range are assured by design, characterization and correlation with
statistical process controls. The LTC3879I is guaranteed to meet
specifi cations over the full –40°C to 85°C operating temperature range.
Note 5: Rise and fall time are measured using 10% and 90% levels. Delay
times are measured using 50% levels.
