MAX8719 Maxim Integrated Products, MAX8719 Datasheet - Page 8

• Manufacturer Part Number: MAX8719
• Description: (MAX8718 / MAX8719) High-Voltage / Low-Power Linear Regulators for Notebook Computers
• Manufacturer: Maxim Integrated Products

Output current is limited to 210mA (typ). The current
limit exceeds the 100mA (min) safe operating limit. The
output can be shorted to ground for 30 seconds without
damaging the part.
When the junction temperature exceeds T
an internal thermal sensor sends a signal to the shut-
down logic, turning off the pass transistor and allowing
the IC to cool. The thermal sensor turns the pass tran-
High-Voltage, Low-Power Linear Regulators for
Notebook Computers
Figure 3. MAX8718/MAX8719 Functional Diagram
8
_______________________________________________________________________________________
(MAX8718)
(MAX8719)
SHDN
V
5/3
CC
FB
Thermal-Overload Protection
SHUTDOWN
THERMAL
BIAS
Current Limit
THRESHOLD
J
REF
= +165°C,
sistor on again after the IC’s junction temperature cools
by 20°C (typ), causing the output to pulse on and off
during continuous thermal-overload conditions.
Maximum power dissipation depends on the thermal
resistance of the case and circuit board, the tempera-
ture difference between the die junction and ambient
air, and the rate of airflow. The device’s power dissipa-
tion is P = I
+70°C ambient is 1951mW (see the Absolute Maximum
Operating Region and Power Dissipation
CURRENT
LIMIT
OUT
IN
DELAY
x (V
IN
MAX8718
MAX8719
- V
OUT
). The power dissipation at
PGOOD
GND
OUT