MAX14523BATA+T Maxim Integrated Products, MAX14523BATA+T Datasheet - Page 8

• Manufacturer Part Number: MAX14523BATA+T
• Description: IC CURRENT LIMIT SWITCH 8-DFN
• Manufacturer: Maxim Integrated Products

Specifications of MAX14523BATA+T

• Function: Current Switch
• Accuracy: ±10%
• Voltage - Input: 1.7 ~ 5.5 V
• Current - Output: Adjustable
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-TDFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Sensing Method: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

250mA to 1.5A, Adjustable
Current-Limit Switches
The MAX14523A/MAX14523AL/MAX14523B/MAX14523C
programmable current-limit switches operate from
+1.7V to +5.5V and provide internal current limiting
adjustable from 250mA to 1.5A. These devices feature
a fixed blanking time, and a FLAG output that notifies
the processor when a fault condition is present.
A resistor from SETI to GND sets the current
limit/threshold for the switch (see the Setting the
Current Limit/Threshold section). If the output current is
limited at the current threshold value for a time equal to
or longer than t
MAX14523A/MAX14523AL enter the autoretry mode,
the MAX14523B latches off the switch, and the
MAX14523C enters the continuous current-limit mode.
8
_______________________________________________________________________________________
Programmable Current Limit/Threshold
ON/(ON)*
*( ) FOR THE MAX14523AL ONLY
N.C.
IN
BLANK
MAX14523AL
, the output flag asserts and the
MAX14523A
MAX14523B
MAX14523C
Detailed Description
BUFFER
REFERENCE
BANDGAP
SHUTDOWN
THERMAL
GND
When the forward current reaches the current thresh-
old, the t
asserts if the overcurrent condition is present for
t
condition disappears before the blanking time (t
has elapsed. A retry time delay (t
ately after the blanking time has elapsed. During that
time, the switch latches off. At the end of t
switch turns on again. If the fault still exists, the cycle
repeats. If the fault has been removed, the switch stays
on. During this cycle, FLAG stays low. In autoretry, if
the die temperature exceeds +170°C (typ) due to self
heating, the MAX14523A/MAX14523AL go into thermal
shutdown until the die temperature drops by approxi-
mately 15°C (see the Thermal Shutdown section.)
BLANK
CURRENT
LIMIT
Autoretry (MAX14523A/MAX14523AL)
or longer. The timer resets if the overcurrent
BLANK
timer begins counting (Figure 2). FLAG
CIRCUITRY
CONTROL
BUFFER
TIMING
LOGIC
PROTECTION
REVERSE-
CURRENT
Functional Diagram
RETRY
) starts immedi-
OUT
FLAG
SETI
RETRY
BLANK
, the
)