MAX14523CATA+T Maxim Integrated Products, MAX14523CATA+T Datasheet - Page 10

• Manufacturer Part Number: MAX14523CATA+T
• Description: IC CURRENT LIMIT SWITCH 8-DFN
• Manufacturer: Maxim Integrated Products

Specifications of MAX14523CATA+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
• Other names: MAX14523CATA+T

250mA to 1.5A, Adjustable
Current-Limit Switches
Table 2. Current Limit/Threshold vs.
Resistor Values
Do not use an R
Note: Connecting any capacitance larger than 20pF to
SETI can cause instability.
Connect a minimum of 1µF capacitor from IN to GND to
limit the input voltage drop during momentary output
short-circuit conditions. Larger capacitor values further
reduce the voltage undershoot at the input.
For stable operation over the full temperature range
and over the full-programmable current-limit range, use
a 1µF ceramic capacitor from OUT to ground.
Excessive output capacitance can cause a false over-
current condition due to decreased dv/dt across the
capacitor. Calculate the maximum capacitive load
(C
following formula:
For example, for V
300mA, C
To optimize the switch response time to output short-
circuit conditions, 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, the power
dissipation is small and the package temperature
10
R
MAX
SETI
563.12
91.78
(Open)
121
221
301
422
______________________________________________________________________________________
) value that can be connected to OUT using the
(k )
C
MAX
MAX
TYPICAL CURRENT LIMIT/THRESHOLD (mA)
( )
equals 909µF.
Layout and Thermal Dissipation
µF
SETI
IN
=
I
value smaller than 91.78kΩ.
LIM
= 3.3V, t
(
mA
OUT Bypass Capacitor
)
×
IN Bypass Capacitor
BLANK
V
t
BLANK MIN
IN
1500
1145
632
466
333
250
( )
0
V
= 10ms, and I
(
)
(
ms
)
LIM
=
change is minimal. If the output is continuously shorted
to ground at the maximum supply voltage, the opera-
tion of the switches with the autoretry option does not
cause problems because the total power dissipated
during the short is scaled by the duty cycle:
Attention must be given to the MAX14523C continuous
current-limit version when the power dissipation during
a fault condition can cause the device to reach the ther-
mal shutdown threshold.
PROCESS: BiCMOS
For the latest package outline information and land patterns,
go to www.maxim-ic.com/packages. Note that a “+”, “#”, or
“-” in the package code indicates RoHS status only. Package
drawings may show a different suffix character, but the drawing
pertains to the package regardless of RoHS status.
PACKAGE
8 TDFN-EP
TYPE
*CONNECT EXPOSED PAD TO GND.
**( ) FOR THE MAX14523AL ONLY.
P
(
MAX
FLAG
N.C.
SETI
OUT
)
=
V
PACKAGE
1
2
3
4
IN MAX
T833+2
CODE
(
+
Package Information
3mm x 3mm
MAX14523AL
t
MAX14523A
MAX14523B
MAX14523C
RETRY
)
TDFN
×
I
OUT MAX
Pin Configuration
Chip Information
OUTLINE
+
(
21-0137
*EP
t
BLA
NO.
)
N N K
×
8
7
6
5
t
BLANK
GND
ON(ON)**
N.C.
IN
PATTERN NO.
90-0059
LAND