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MAX14523CATA+T

P1-P3P4-P6P7-P9P10-P11
General Description
The MAX14523A/MAX14523AL/MAX14523B/MAX14523C
programmable current-limit switches feature internal
current limiting to prevent damage to host devices due
to faulty load conditions. These current-limit switches
feature a low 70mΩ on-resistance and operate from a
+1.7V to +5.5V input voltage range. The current limit is
adjustable from 250mA to 1.5A, making these devices
ideal for SDIO (secure digital input/output) and other
load-switching applications.
Each device in the family handles an overcurrent event
differently depending on the option selected. The
MAX14523A/MAX14523AL go into an autoretry mode,
the MAX14523B latches off the switch, and the
MAX14523C features a continuous current-limit mode.
Additional safety features include thermal shutdown to
prevent overheating and reverse-current blocking to
prevent current from being driven back into the source.
The MAX14523A/MAX14523AL/MAX14523B/MAX14523C
are available in a tiny 8-pin, 3mm x 3mm, TDFN pack-
age and operate over the -40°C to +125°C automotive
temperature range.
Applications
SDIO Ports
USB Ports
Notebook VGA Ports
GPS
Cell Phones
MP3 Players
UTCA/ATCA Platforms
Features
♦ Accurate (±10%) Overload Current Limit
♦ Adjustable Current-Limit Threshold
♦ Low-Dropout Voltage (70mV at 1A Load Current)
♦ Short-Circuit Protection
♦ Thermal-Shutdown Protection
♦ Reverse-Current Protection
♦ 170µA (typ) Supply Current
♦ Shutdown Reverse Current, 0.6µA (max)
♦ +1.7V to +5.5V Supply Voltage Range
♦ Tiny 8-Pin, 3mm x 3mm, TDFN Package
MAX14523A/MAX14523AL/MAX14523B/MAX14523C
250mA to 1.5A, Adjustable
Current-Limit Switches
________________________________________________________________
Maxim Integrated Products
1
Ordering Information/Selector Guide
MAX14523A
MAX14523AL
MAX14523B
MAX14523C
1μF
R
SETI
10kΩ
BIAS
VOLTAGE
LOAD
CHARGE
PUMP
CONTROL
LOGIC
POWER
SUPPLY
μP
CURRENT
REFERENCE
GND
N.C.
1μF
OUTIN
FLAG
ON(ON)*
V
PULLUP
*ON FOR THE MAX14523AL ONLY.
Typical Operating Circuit
19-4814; Rev 1; 1/11
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
PART PIN-PACKAGE TOP MARK ON POLARTIY OVERCURRENT RESPONSE
MAX14523AATA+ 8 TDFN-EP* BLO Active-High Autoretry
MAX14523ALATA+** 8 TDFN-EP* BLP Active-Low Autoretry
MAX14523BATA+ 8 TDFN-EP* BLQ Active-High Latch-Off
MAX14523BATA/V+T 8 TDFN-EP* BLQ Active-High Latch-Off
MAX14523CATA+ 8 TDFN-EP* BLS Active-High Continuous
Pin Configuration appears at end of data sheet.
Note: All devices are specified over the -40°C to +125°C operating temperature range.
+
Denotes a lead(Pb)-free package/RoHs-compliant package.
/V denotes an automotive qualified part.
*
EP = Exposed pad.
**
Future product—contact factory for availability.
MAX14523A/MAX14523AL/MAX14523B/MAX14523C
250mA to 1.5A, Adjustable
Current-Limit Switches
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
IN
= +1.7V to +5.5V, R
SETI
= 94.2kΩ, C
IN
= C
OUT
= 1µF, and T
A
= T
J
= -40°C to +125°C, unless otherwise noted. Typical values
are at V
IN
= +3.3V, T
A
= +25°C.) (Note 2)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-
layer board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial
.
(All voltages referenced to GND.)
IN, ON, ON, FLAG, OUT, and SETI to GND .............-0.3V to +6V
Current into Any Pin (Except IN, OUT)................................20mA
Out Short Circuit to GND...................................Internally Limited
Continuous Power Dissipation (T
A
= +70°C) for multilayer board:
TDFN (derate 24.4mW/°C above +70°C)...................1952mW
Operating Temperature Range .........................-40°C to +125°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow) .......................................+260°C
PACKAGE THERMAL CHARACTERISTICS (Note 1)
TDFN
Junction-to-Ambient Thermal Resistance (θ
JA
) ...........41°C/W
Junction-to-Case Thermal Resistance (θ
JC
) ..................8°C/W
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
SUPPLY OPERATION
Operating Voltage V
IN
1.7 5.5 V
Quiescent Current I
Q
I
OUT
= 0A, switch on, V
IN
= 3.3V 170 300 μA
Latchoff Current I
LATCH
V
IN
= 3.3V, I
OUT
= 0A , after an overcurrent
fault (MAX14523B)
10 20 μA
Shutdown Forward Current I
SHDN
V
ON
= 0V, V
ON
= V
IN
, V
IN
= 5.5V, V
OUT
= 0V 0.5 7 μA
Shutdown Reverse Current I
RSHDN
V
ON
= 0V, V
ON
= V
IN
, V
IN
= 1.7V, V
OUT
=
5.5V (current into OUT)
0.01 0.6 μA
INTERNAL FET
Switch-On Resistance R
ON
V
IN
= 3.3V, I
OUT
lower than I
LIM
70 130 m
R
SETI
= 91.78k, V
IN
- V
OUT
= 1V 1350 1500 1650
Forward-Current Limit I
LIM
R
SETI
= 563.12k, V
IN
- V
OUT
= 1V 225 250 275
mA
(R
SETI
+2.48k) × I
LIM
Product
I
LIM
= 250mA to 1500mA,
V
IN
- V
OUT
= 1V
127.2 141.4 155.5 kV
Reverse Blocking Current
V
OUT
> V
IN
+ 140mV, after reverse-current-
limit shutdown
2 μA
Reverse Blocking Threshold V
OUT
- V
IN
V
OUT
- V
IN
= 300mV, OUT falling until
switch turns on
40 95 140 mV
FLAG Assertion Drop Voltage
Threshold
V
FA
Increase (V
IN
- V
OUT
) drop until FLAG
asserts, I
OUT
limiting, V
IN
= 3.3V
350 mV
ON, ON INPUT
ON, ON Input Leakage I
LEAK
V
ON
, V
ON
= V
IN
or V
GND
-1 +1 μA
ON, ON Input Logic-High Voltage V
IH
1.6 V
ON, ON Input Logic-Low Voltage V
IL
0.4 V
MAX14523A/MAX14523AL/MAX14523B/MAX14523C
250mA to 1.5A, Adjustable
Current-Limit Switches
_______________________________________________________________________________________ 3
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
FLAG OUTPUT
FLAG Output Logic-Low Voltage I
SINK
= 1mA 0.4 V
FLAG Output Leakage Current V
IN
= V
FLAG
= 5.5V, FLAG deasserted 1 μA
DYNAMIC
Turn-On Time t
SS
Time from ENABLE signal to V
OUT
= 90%
of V
IN
= 3.3V, Figure 1
1 ms
Turn-Off Time t
OFF
Time from DISABLE signal to V
OUT
= 10%
of V
IN
= 3.3V, R
L
= 20, Figure 1
250 μs
Current-Limit Reaction Time t
LIM
V
IN
= 3.3V, R
SETI
= 91.78k to 563.12k,
output high and then short-circuit applied
3 μs
Blanking Time t
BLANK
(Note 3) 10 14.5 25 ms
Retry Time t
RETRY
MAX14523A/MAX14523AL (Note 3) 320 875 ms
THERMAL PROTECTION
Thermal Shutdown Low-to-high +170 °C
Thermal Shutdown Hysteresis 15 °C
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= +1.7V to +5.5V, R
SETI
= 94.2kΩ, C
IN
= C
OUT
= 1µF, and T
A
= T
J
= -40°C to +125°C, unless otherwise noted. Typical values
are at V
IN
= +3.3V, T
A
= +25°C.) (Note 2)
Note 2: All devices are 100% tested at 125°C. Electrical limits across the full temperature range are guaranteed by design and correlation.
Note 3: Blanking time and retry time are generated by the same oscillator. Therefore, the ratio of is a constant value of 32.
See Figures 2 and 3.
t
t
RETRY
BLANK
t
SS
t
OFF
V
OUT
10% V
IN
90% V
IN
ON(ON)*
*( ) THE POLARITY OF THE SIGNAL IS REVERSED FOR THE MAX14523AL ONLY.
Figure 1. Timing Diagram for Measuring Turn-On Time (t
SS
) and Turn-Off Time (t
OFF
)
P1-P3P4-P6P7-P9P10-P11

MAX14523CATA+T

Mfr. #:
Buy MAX14523CATA+T
Manufacturer:
Maxim Integrated
Description:
Power Switch ICs - Power Distribution Adjustable Current Limit Switch
Lifecycle:
New from this manufacturer.
Delivery:
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