MAX4766CETA+ Fast Delivery |IC PHOENIX CO.,LIMITED

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MAX4766CETA+
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
Features±10% Accurate Current Limit0.075A to 1.5A Programmable Current LimitInrush Current ProtectionThermal Shutdown ProtectionReverse-Current ProtectionLow Dropout VoltageProgrammable Blanking TimeProgrammable Soft-Start TimeFFLLAAGGFunction (MAX4766B/MAX4766C)Tiny 8-Pin TDFN Package (3mm x 3mm)2.25V to 4.5V Supply Range
MAX4766
0.075A to 1.5A, Programmable
Current-Limit Switch
Ordering Information/Selector Guide
2.25V TO 4.5VOUT
FLAG*
GNDMAX4766SETB
SETS
SETI
*MAX4766B/C
Typical Operating Circuit
19-3458; Rev 0; 10/04
PARTTEMP RANGEPIN-PACKAGETOP MARKPKG CODESOFT-START/
BLANKING
OVERCURRENT
RESPONSE
MAX4766AETA-40°C to +85°C8 TDFNAKVT833-1ProgrammableAutoretry
MAX4766BETA-40°C to +85°C8 TDFNAKWT833-1ProgrammableLatch-Off
MAX4766CETA-40°C to +85°C8 TDFNAKXT833-1ProgrammableContinuous
SETSOUT
GNDFLAG
SETI
SETB
TDFN
TOP VIEW
MAX4766
Pin Configuration
MAX4766
0.075A to 1.5A, Programmable
Current-Limit Switch
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(VIN= 2.25V to 4.5V, COUT= 2.2µF, TA= -40°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C, unless other-
wise noted.) (Note 1)
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.
IN, OUT, ON, FLAGto GND.....................................-0.3V to +5V
SETB, SETS, SETI to GND...........................-0.3V to (VIN+ 0.3V)
IN to OUT...............................................................................±5V
OUT Short-Circuit Duration........................................Continuous
Continuous Switch Current.................................................1.75A
Current into any Pin (Except IN, OUT)..............................±20mA
Continuous Power Dissipation (TA= +70°C)
8-Pin TDFN (derate 18.2mW/°C above +70°C)...455mW (T833-1)
Operating Temperature Range...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range.............................-65°C to +150°C
Human Body Model ESD Protection....................................±2kV
Lead Temperature (soldering, 10s).................................+300°C
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
Operating Voltage RangeVIN2.254.5V
Undervoltage LockoutVUVLOVIN rising1.62.0V
Undervoltage Lockout Hysteresis125mV
IOU T = 0, sw i tch on, RS E T I = 0Ω ( ILIM IT = 1.5A) 3585
IOUT = 0, switch on, RSETI = 200.9kΩ
(ILIMIT = 0.56A)95135Quiescent CurrentIQ
IOUT = 0, switch on, RSETI = 1500kΩ
(ILIMIT = 0.075A)75120
VIN = 3.6V, VON = 0, VOUT = 0V,
TA = +25°C0.1
VIN = 3.6V, VON = 0, VOUT = 0V,
TA = +85°C13.5
VIN = 4.0V, VON = 0, VOUT = 0V,
TA = +25°C0.12
Shutdown CurrentISHDN
VIN = 4.0V, VON = 0, VOUT = 0V,
TA = +85°C18
VOUT = 0V, RSETI = 0Ω (VIN = 2.25 to 4.0V)1.351.501.67
VOUT = 0V, RSETI = 200.9kΩ
(VIN = 2.25 to 4.0V)537590640A
VOUT = 0V, RSETI = 1500kΩ
(VIN = 2.25 to 3.6V)7379.585.5Current LimitILIM
VOUT = 0V, RSETI = 1500kΩ
(VIN = 2.25 to 4.0V)738087
MAX4766
0.075A to 1.5A, Programmable
Current-Limit Switch
ELECTRICAL CHARACTERISTICS (continued)
(VIN= 2.25V to 4.5V, COUT= 2.2µF, TA= -40°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C, unless other-
wise noted.) (Note 1)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
RSETI ILIM Product0.075A ≤ ILIMIT ≤ 1.5A, VOUT = 0V101112.5124kVON = V IN = 3V , IOU T = 0.9 x ILIM IT( m i n ) ,
RS E T I = 0Ω ( typ i cal ILIM IT = 1.5A) 290ON = V IN = 3V , IOU T = 0.33 x ILIMIT( m i n) ,
RS E TI = 0Ω ( typ i cal ILIMIT = 1.5A) 105Switch Dropout Voltage (Note 2)ON = V IN = 3V , IOU T = 0.9 x ILIM IT( m i n ) ,
RS E T I = 200.9kΩ ( typ i cal ILIM IT = 0.56A) 245
VIN = 3.6V, VON = 0V, VOUT = 0V,
TA = +25°C0.1
VIN = 3.6V, VON = 0V, VOUT = 0V,
TA = +85°C13.5
VIN = 4.0V, VON = 0V, VOUT = 0V,
TA = +25°C0.12
Forward-Off Switch Leakage
CurrentIOUT(OFF)
VIN = 4.0V, VON = 0V, VOUT = 0V,
TA = +85°C18
VIN = 0V, VOUT = 3.6V, VON = 0V,
TA = +25°C0.1
VIN = 0V, VOUT = 3.6V, VON = 0V,
TA = +85°C13.8
VIN = 0V, VOUT = 4.0V, VON = 0V,
TA = +25°C0.125
Reverse Leakage Current
(Device Disabled)IINR(OFF)
VIN = 0V, VOUT = 4.0V, VON = 0V,
TA = +85°C18
VIN = 0V, VOUT = 3.6V, VON = VOUT,
TA = +25°C0.17
VIN = 0V, VOUT = 3.6V, VON = VOUT,
TA = +85°C30
VIN = 0V, VOUT = 4.0V, VON = VOUT,
TA = +25°C0.22
Reverse Leakage Current
(Device Enabled)IINR(OFF)
VIN = 0V, VOUT = 4.0V, VON = VOUT,
TA = +85°C40
ON LOGIC
ON Logic-High VoltageVIH1.4V
ON Logic-Low VoltageVIL0.6V
MAX4766
0.075A to 1.5A, Programmable
Current-Limit Switch
Note 1:All parameters tested at TA= +25°C. Limits through the temperature range are guaranteed by design.
Note 2:Not production tested. Guaranteed by design.
Note 3:Turn-on time (also called soft-start time) is defined as the difference in the time between when the output crosses 10%, and
90% of the final output voltage.
Typical Operating Characteristics
(VIN= 3.3V, COUT= 2.2µF, RSETI= 0kΩ, TA= +25°C, unless otherwise noted.)
CURRENT LIMIT
vs. SUPPLY VOLTAGE
MAX4766 toc01
SUPPLY VOLTAGE (V)
CURRENT LIMIT (A)
VCC = 3V
CURRENT LIMIT
vs. TEMPERATURE
MAX4766 toc02
TEMPERATURE (°C)
CURRENT LIMIT (A)3510-15
VCC = 3V
BLANKING TIME
vs. TEMPERATURE
MAX4766 toc03
TEMPERATURE (°C)
BLANKING TIME (ms)3510-15
ELECTRICAL CHARACTERISTICS (continued)
(VIN= 2.25V to 4.5V, COUT= 2.2µF, TA= -40°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C, unless other-
wise noted.) (Note 1)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
FLAG OUTPUT LOGIC
FLAG Output Logic-Low VoltageVOLISINK = 1mA0.4V
FLAG Outp ut H i g h Leakag e C ur r entVIN = V FLAG = 5.5V1µA
THERMAL PROTECTION
Thermal ShutdownVIN = 3.3V, junction temperature rising150°C
Thermal Shutdown HysteresisVIN = 3.3V15°C
DYNAMIC
Turn-On Time (Note 3)TSSCSETS = 0.01µF5917.5ms
Turn-Off TimeTOFFVON from high to low; RL = 10Ω, RSET = 0,
VIN = 3.3V75150µs
Current-Limit Reaction TimeVIN = 4V, RSET = 0Ω, output high and then
short-circuit applied1µs
Blanking TimetBLANKCSETB = 0.01µF3.56.7511.5ms
Retry Time225420700ms
MAX4766
0.075A to 1.5A, Programmable
Current-Limit Switch
CURRENT-LIMIT RESPONSE
MAX4766 toc04a
10μs/div
OUTPUT
2V/div
OUTPUT LOAD
2A/div
SUDDEN SHORT
APPLIED AT THE
OUTPUT
CURRENT-LIMIT RESPONSE
MAX4766 toc04b
10μs/div
OUTPUT
2V/div
OUTPUT LOAD
1A/div
2A OF LOAD APPLIED
AT THE OUTPUT
QUIESCENT SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX4766 toc05
VOLTAGE (V)
SUPPLY CURRENT (
RISET = 0Ω
RISET OPEN
QUIESCENT SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX4766 toc06
VOLTAGE (V)
SUPPLY CURRENT ( 3510-15-4085
RISET = 0Ω
RISET OPEN
SHUTDOWN SUPPLY CURRENT
vs. TEMPERATURE
MAX4766 toc07
TEMPERATURE (°C)
SHUTDOWN SUPPLY CURRENT ( 3510-15
SHUTDOWN LEAKAGE CURRENT
vs. TEMPERATURE
MAX4766 toc08
TEMPERATURE (°C)
SHUTDOWN LEAKAGE CURRENT (3510-15
REVERSE SHUTDOWN LEAKAGE CURRENT
vs. TEMPERATURE
MAX4766 toc09
TEMPERATURE (°C)
REVERSE SHUTDOWN LEAKAGE CURRENT (3510-15
VON = 0V
REVERSE SHUTDOWN LEAKAGE CURRENT
vs. TEMPERATURE
MAX4766 toc10
TEMPERATURE (°C)
REVERSE SHUTDOWN LEAKAGE CURRENT (35-1510
VON = VCCypical Operating Characteristics (continued)
(VIN= 3.3V, COUT= 2.2µF, RSETI= 0kΩ, TA= +25°C, unless otherwise noted.)
MAX4766
0.075A to 1.5A, Programmable
Current-Limit Switch
TURN-ON TIME
MAX4766 toc11
4ms/div
INPUT
OUTPUT
TURN-OFF TIME
MAX4766 toc12
2ms/div
INPUT
OUTPUT
FLAG RESPONSE TIME
(OVERLOAD CONDITION)
MAX4766 toc13
2ms/div
OUTPUT LOAD
1A/div
OUTPUT
2V/div
FLAG
5V/div
SWITCH DROPOUT VOLTAGE
vs. TEMPERATURE
MAX4766 toc14
TEMPERATURE (°C)
DROPOUT VOLTAGE (mV)3510-15
VCC = 3Vypical Operating Characteristics (continued)
(VIN= 3.3V, COUT= 2.2µF, RSETI= 0kΩ, TA= +25°C, unless otherwise noted.)

Partno	Mfg	Dc	Qty	Available	Descript
MAX4766CETA+	MAXIM	N/a	32000	avai	0.075A to 1.5A, Programmable Current-Limit Switch