EL7564C Elantec Semiconductor, EL7564C Datasheet - Page 11

• Manufacturer Part Number: EL7564C
• Description: Monolithic 4 Amp DC:DC Step-down Regulator
• Manufacturer: Elantec Semiconductor

junction temperature T
following relation:
Where VTJ is the voltage at VTJ pin in volts.
Power Good and Power On Reset
During power up the output regulator will be disabled
until VIN reaches a value of approximately 4V. About
500mV hysteresis is present to eliminate noise-induced
oscillations.
Under-voltage and over-voltage conditions on the regu-
lator output are detected through an internal window
10
10
1
2
6
7
8
9
1
2
6
7
8
9
T
J
=
EL7564C
EL7564C
J
75
(°C) can be deducted from the
+
+
-
-
+
1.2 VTJ
----------------------- -
0.00384
–
20
19
15
14
13
12
11
20
19
15
14
13
12
11
Figure 2. Linear Power Tracking
V
V
Monolithic 4 Amp DC:DC Step-down Regulator
C
P
11
comparator. A logic high on the PG output indicates that
the regulated output voltage is within about +10% of the
nominal selected output voltage.
Power Tracking
The power tracking pins STP and STN are the inputs to
a comparator, whose HI output forces the PWM control-
ler to skip switching cycle.
1. Linear Tracking
In this application, it is always the case that the lower
voltage supply V
Please see Figure 2 below.
V
OUT
C
tracks the higher output supply V
TIME
EL7564C
V
V
P
C
P
.