MAX4766 Datasheet, PDF (1/12 Pages) Maxim Integrated Products – 0.075A to 1.5A, Programmable Current-Limit Switch

19-3458; Rev 0; 10/04
0.075A to 1.5A, Programmable
Current-Limit Switch
General Description
The MAX4766 is a programmable current-limit switch
that uses a proprietary control topology to provide a
±10% accurate current limit. It operates from 2.25V to
4.5V input voltage.
The current limit is resistor settable from 0.075A to 1.5A
and features an adjustable soft-start function to control
the output-voltage ramp rate, thereby limiting the inrush
current. It also has an adjustable blanking time to
accommodate various capacitive loads.
If the load current is greater than the current-limit
threshold, the current limiter handles the overcurrent
situation in one of three ways depending on the option
selected. It enters an autoretry mode (MAX4766A),
latches off the switch (MAX4766B), or places the
device in a continuous current-limit mode (MAX4766C).
Additional safety features include thermal shutdown to
prevent overheating and reverse-current blocking to
prevent current from being driven back into the source.
The MAX4766 is available in a tiny 8-pin 3mm x 3mm
TDFN package and operates over the extended tem-
perature range of -40°C to +85°C.
Applications
SDIO Ports
Notebook Computers
PDAs and Palmtop Devices
Cell Phones
TOP VIEW
SETB 1
FLAG 2
SETI 3
OUT 4
Pin Configuration
MAX4766
TDFN
8 GND
7 ON
6 SETS
5 IN
Features
♦ ±10% Accurate Current Limit
♦ 0.075A to 1.5A Programmable Current Limit
♦ Inrush Current Protection
♦ Thermal Shutdown Protection
♦ Reverse-Current Protection
♦ Low Dropout Voltage
♦ Programmable Blanking Time
♦ Programmable Soft-Start Time
♦ FLAG Function (MAX4766B/MAX4766C)
♦ Tiny 8-Pin TDFN Package (3mm x 3mm)
♦ 2.25V to 4.5V Supply Range
Typical Operating Circuit
2.25V TO 4.5V
µP
*MAX4766B/C
IN
OUT
ON
FLAG* MAX4766 _SETB
SETI
SETS
GND
PART
TEMP RANGE PIN-PACKAGE
MAX4766AETA
MAX4766BETA
MAX4766CETA
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
8 TDFN
8 TDFN
8 TDFN
Ordering Information/Selector Guide
TOP MARK
AKV
AKW
AKX
PKG CODE
T833-1
T833-1
T833-1
SOFT-START/
BLANKING
Programmable
Programmable
Programmable
OVERCURRENT
RESPONSE
Autoretry
Latch-Off
Continuous
________________________________________________________________ Maxim Integrated Products 1
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