MAX16947 Maxim, MAX16947 Datasheet - Page 18

• Manufacturer Part Number: MAX16947
• Description: The MAX16946/MAX16947 high-voltage, high-side, current-sense LDO/switches feature internal current limiting to prevent system damage due to fault conditions
• Manufacturer: Maxim

Remote Antenna, Current-Sense and
LDO/Switches
To optimize the switch response time to output short-
circuit condition, it is very important to keep all traces
as short as possible to reduce the effect of undesirable
parasitic inductance. Place input and output capacitors
as close as possible to the device (no more than 5mm).
IN and OUT must be connected with wide short traces
to the power bus. During normal operation in switch
mode, the power dissipation is small and the package
temperature change is minimal. In LDO mode, the power
dissipation is given by:
Figure 8. LDO with Adjustable Output Voltage (3.3V to 15V)
18
_____________________________________________________________________________________
(V
IN
Layout and Thermal Dissipation
- V
OUT
CURRENT-
) x I
BATTERY INPUT
OUTPUT
ON/OFF
ERROR
FLAGS
SENSE
LOAD
R
PU
C
+ V
IN
C SUPPLY
IN
x I
IN
IN
SC
OL
AOUT
SHDN
R
SENSE
MAX16946
GND
SENS
COMP
OUT
REG
OLT
REF
LIM
FB
If the output is continuously shorted to ground at the max-
imum supply voltage, the devices are protected because
the total power dissipated during the short is scaled
down by the duty cycle imposed by the protection:
P
R
R
R
R
5
6
1
2
(MAX)
R
R
C
3
4
OUT
=
V
VIN(MAX)
L
t
OUT
RETRY
REGULATED
PHANTOM
×
SUPPLY
I
OUT(MAX)
+
t
BLANK
×
t
BLANK