MAX4785EXK+T Maxim Integrated Products, MAX4785EXK+T Datasheet

IC SWITCH 1X1 SC70-5

MAX4785EXK+T

Manufacturer Part Number
MAX4785EXK+T
Description
IC SWITCH 1X1 SC70-5
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of MAX4785EXK+T

Function
Switch
Circuit
1 x 1:1
On-state Resistance
1 Ohm
Voltage Supply Source
Single Supply
Voltage - Supply, Single/dual (±)
2.3 V ~ 5.5 V
Current - Supply
65µA
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
6-TSSOP (5 lead), SC-88A, SOT-353
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
MAX4785EXK+T
MAX4785EXK+TTR
The MAX4785–MAX4788 family of switches feature inter-
nal current limiting to prevent host devices from being
damaged due to faulty load conditions. These analog
switches have a low 0.7Ω on-resistance and operate
from a 2.3V to 5.5V input voltage range. They are avail-
able with guaranteed 50mA and 100mA current limits,
making them ideal for load-switching applications.
When the switch is on and a load is connected to the
port, a guaranteed blanking time of 14ms ensures that
the transient voltages settle down. If after this blanking
time the load current is greater than the current limit,
the MAX4785 and MAX4787 enter a latch-off state
where the switch is turned off and FLAG is issued to the
microprocessor. The switch can be turned on again by
cycling the power or the ON pin.
The MAX4786 and MAX4788 have an autoretry feature
where the switch turns off after the blanking time and
then continuously checks to see if the overload condi-
tion is present. The switch remains on after the overload
condition disappears.
The MAX4785 and MAX4787 are available in a tiny
space-saving 4-pin or 5-pin SC70 package. The
MAX4786 and MAX4788 are available only in the 4-pin
SC70 package. For higher current current-limiting
switches, refer to the MAX4789–MAX4794 and
MAX1693 data sheets.
19-2664; Rev 1; 4/03
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
TOP VIEW
FLAG
OUT
GND
PDAs and Palmtop Devices
Cell Phones
GPS Systems
Hand-Held Devices
1
2
3
MAX4785
MAX4787
SC70
________________________________________________________________ Maxim Integrated Products
General Description
5
4
Pin Configurations
IN
ON
50mA/100mA Current-Limit Switches
OUT
GND
Applications
1
2
MAX4785–
MAX4788
SC70
4
3
IN
ON
♦ Guaranteed Current Limit: 50mA, 100mA
♦ Thermal-Shutdown Protection
♦ Reverse-Current Protection
♦ 0.7Ω On-Resistance
♦ 14ms Guaranteed Blanking Time
♦ FLAG Function (MAX4785/MAX4787)
♦ 65µA Supply Current
♦ 8µA Latch-Off Current (MAX4785/MAX4787)
♦ 0.01µA Shutdown Current
♦ 2.3V to 5.5V Supply Range
♦ Undervoltage Lockout
♦ Fast Current-Limit Response Time
♦ Tiny SC70 Package
Selector Guide appears at end of data sheet.
MAX4785EXS-T
MAX4785EXK-T
MAX4786EXS-T
MAX4787EXS-T
MAX4787EXK-T
MAX4788EXS-T
PART
ON
Typical Operating Circuit
2.3V TO 5.5V
MAX4785
MAX4787
GND
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
IN
Ordering Information
FLAG
OUT
TO EXTERNAL PORT
PIN-
PACKAGE
4 SC70-4
5 SC70-5
4 SC70-4
4 SC70-4
5 SC70-5
4 SC70-4
Features
µP
MARK
AGG
TOP
AGE
AND
AGH
ADL
AGF
1

Related parts for MAX4785EXK+T

MAX4785EXK+T Summary of contents

Page 1

... MAX4787 FLAG GND SC70 ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. ♦ Guaranteed Current Limit: 50mA, 100mA ♦ Thermal-Shutdown Protection ♦ Reverse-Current Protection ♦ 0.7Ω On-Resistance ♦ 14ms Guaranteed Blanking Time ♦ ...

Page 2

Current-Limit Switches ABSOLUTE MAXIMUM RATINGS IN, ON, FLAG, OUT to GND .....................................-0.3V to +6V OUT Short Circuit to GND .................................Internally Limited Continuous Power Dissipation (T = +70°C) A 4-Pin SC70 (derate 3.1mW/°C above +70°C) ..............245mW 5-Pin SC70 (derate 3.1mW/°C ...

Page 3

Current-Limit Switches ELECTRICAL CHARACTERISTICS (continued 2.3V to 5.5V -40°C to +85°C, unless otherwise noted. Typical values are PARAMETER SYMBOL Blanking Time Short-Circuit Current-Limit Response Time Retry Time (Note 4) Note 1: ...

Page 4

Current-Limit Switches (V = 3.3V +25°C, unless otherwise noted NORMALIZED ON-RESISTANCE vs. TEMPERATURE 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 -40 -15 10 TEMPERATURE (°C) SWITCH TURN-ON/OFF TIMES vs. TEMPERATURE 100 ...

Page 5

Current-Limit Switches (V = 3.3V +25°C, unless otherwise noted CURRENT-LIMIT RESPONSE (OUT SHORTED TO GND) 40µs/div SWITCH TURN-OFF TIME RESPONSE 100ns/div PIN NAME SC70 SC70 1 1 OUT 2 2 GND FLAG — ...

Page 6

Current-Limit Switches IN UNDERVOLTAGE ON LOCKOUT LOGIC AUTO- RETRY Figure 1. MAX4785–MAX4788 Functional Diagram Detailed Description The MAX4785–MAX4788 are forward/reverse current- limited switches that operate from a 2.3V to 5.5V input voltage range and guarantee a 50mA and 100mA ...

Page 7

Current-Limit Switches Table 1. MAX4785–MAX4788 Switch Truth Table ON FAULT Low X High Undervoltage lockout High Thermal High Current limit The MAX4785 and MAX4787 feature a latched fault out- put, FLAG. Whenever a fault is activated, it latches FLAG ...

Page 8

Current-Limit Switches t t BLANK BLANK LOAD CURRENT ON SWITCH STATUS OFF ON PIN VOLTAGE FLAG PIN STATUS ( BLANK BLANK LOAD CURRENT ON SWITCH STATUS OFF UVLO IN PIN VOLTAGE FLAG PIN STATUS (b) Figure 3. ...

Page 9

Current-Limit Switches (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages.) Chip Information TRANSISTOR COUNT: 1659 PROCESS: BiCMOS _______________________________________________________________________________________ Package Information PACKAGE OUTLINE, 4L SC70 ...

Page 10

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 10 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2005 Maxim Integrated Products Package Information (continued) ...

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