MAX4792EUS+T Maxim Integrated, MAX4792EUS+T Datasheet

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MAX4792EUS+T

Manufacturer Part Number
MAX4792EUS+T
Description
Power Switch ICs - Power Distribution 200/250/300mA Crnt Limit Switch
Manufacturer
Maxim Integrated
Datasheet
1.MAX4792EUST.pdf (11 pages)

Specifications of MAX4792EUS+T

Rohs
yes
Number Of Outputs
1
Operating Supply Voltage
2.3 V to 5.5 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Package / Case
SOT-143
Minimum Operating Temperature
- 40 C
The MAX4789–MAX4794 family of switches feature
internal current limiting to prevent damage to host
devices due to faulty load conditions. These analog
switches have a low 0.2Ω on-resistance and operate
from 2.3V to 5.5V input voltage range. They are avail-
able with guaranteed 200mA, 250mA, and 300mA cur-
rent limits, making them ideal for SDIO and other 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 MAX4789, MAX4791, and MAX4793 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 MAX4790, MAX4792, and MAX4794 have an
autoretry feature where the switch turns off after the
blanking time and then continuously checks to see if
the overload condition is present. The switch remains
on after the overload condition disappears.
The MAX4789–MAX4794 are available in 6-pin 3mm x
3mm TDFN and tiny space-saving 4-pin SOT143 pack-
ages. The MAX4789/MAX4790/MAX4791/MAX4793 are
also available in a tiny 5-pin SOT23 package. For lower
current current-limiting switches, refer to the MAX4785–
MAX4788 data sheet.
19-2663; Rev 3; 10/08
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.
Pin Configurations continued at end of data sheet.
TOP VIEW
GND
ON
IN
200mA/250mA/300mA Current-Limit Switches
PDAs and Palmtop Devices
Cell Phones
GPS Systems
Handheld Devices
SDIO
1
2
3
MAX4789
MAX4791
MAX4793
SOT23
________________________________________________________________ Maxim Integrated Products
5
4
General Description
OUT
FLAG
Pin Configurations
OUT
GND
1
2
Applications
MAX4789–
SOT143
MAX4794
4
3
IN
ON
♦ Guaranteed Current Limit: 200mA, 250mA, 300mA
♦ Thermal-Shutdown Protection
♦ Reverse Current Protection
♦ 0.2Ω On-Resistance
♦ 14ms Guaranteed Blanking Time
♦ FLAG Function (MAX4789/MAX4791/MAX4793)
♦ 80µA Supply Current
♦ 8µA Latch-Off Current
♦ 0.01µA Shutdown Current
♦ 2.3V to 5.5V Supply Range
♦ Undervoltage Lockout
♦ Fast Current-Limit Response Time (5µs)
♦ TDFN and SOT23/SOT143 Packages
*EP = Exposed paddle.
+Denotes a lead-free/RoHS-compliant package.
T = Tape and reel.
Ordering Information continued at end of data sheet.
Selector Guide appears at end of data sheet.
MAX4789EUS+T
MAX4789EUK+T
MAX4789ETT+
MAX4790EUS+T
MAX4790ETT+
(MAX4789/MAX4791/MAX4793)
PART
ON
Typical Operating Circuit
2.3V TO 5.5V
MAX4789
MAX4791
MAX4793
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
TEMP RANGE
IN
Ordering Information
FLAG
OUT
TO SDIO PORT
PIN-
PACKAGE
4 SOT143
5 SOT23
6 TD FN - E P *
4 SOT143
6 TDFN-EP
Features
μP
MARK
AEAC
KAFE
KAFF
ABO
TOP
ABP
1

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MAX4792EUS+T Summary of contents

Page 1

... FLAG GND 2 SOT23 Pin Configurations continued at end of data sheet. ________________________________________________________________ Maxim Integrated Products 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. ♦ Guaranteed Current Limit: 200mA, 250mA, 300mA ♦ Thermal-Shutdown Protection ♦ Reverse Current Protection ♦ ...

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 SOT143 (derate 4.0mW/°C above +70°C)..........320mW 5-Pin SOT23 (derate 7.1mW/°C above ...

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 t Short-Circuit Current-Limit Response Time Retry Time (Note 4) t ...

Page 4

Current-Limit Switches (V = 3.3V +25°C, unless otherwise noted NORMALIZED ON-RESISTANCE vs. TEMPERATURE 1.4 1.2 1.0 V 0.8 0.6 0.4 0.2 0 -40 -15 10 TEMPERATURE (°C) SWITCH TURN-ON/OFF TIMES vs. TEMPERATURE 1000 ON 100 ...

Page 5

Current-Limit Switches (V = 3.3V +25°C, unless otherwise noted CURRENT-LIMIT RESPONSE (OUT SHORTED TO GND 1μ 1μF OUT 40μs/div SWITCH TURN-OFF TIME RESPONSE 200ns/div PIN TDFN-EP TDFN-EP 5-SOT23 4-SOT143 MAX4789 ...

Page 6

Current-Limit Switches IN UNDERVOLTAGE ON LOCKOUT LOGIC AUTO- RETRY Figure 1. Functional Diagram Detailed Description The MAX4789–MAX4794 are forward/reverse current- limited switches that operate from a 2.3V to 5.5V input voltage range and guarantee a 200mA, 250mA, and 300mA ...

Page 7

Current-Limit Switches Table 1. MAX4789–MAX4794 Switch Truth Table ON FAULT Low X OFF High Undervoltage Lockout OFF High Thermal OFF immediately (t OFF after t ON during t High Current Limit MAX4790, MAX4792, and MAX4794; cycle repeats until fault ...

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 IN PIN UVLO VOLTAGE FLAG PIN STATUS (b) Figure 3. ...

Page 9

... TDFN *EP = EXPOSED PAD. CONNECT EP TO GND FOR THE MAX4790, MAX4792, AND MAX4794. _______________________________________________________________________________________ Ordering Information (continued) PART MAX4791EUS+T MAX4791EUK+T OUT MAX4791EUK/V+T IN MAX4791ETT+ MAX4792EUS+T N.C. MAX4792ETT+ MAX4793EUS+T MAX4793EUK+T MAX4793ETT+ MAX4794EUS+T MAX4794ETT Exposed paddle. /V denotes an automotive qualified part. + Denotes a lead-free/RoHS-compliant package. PART ...

Page 10

Current-Limit Switches For the latest package outline information and land patterns www.maxim-ic.com/packages. PACKAGE TYPE 4 SOT143 5 SOT23 6 TDFN-EP 10 ______________________________________________________________________________________ Package Information PACKAGE CODE U4-2 U5-2 T633-2 DOCUMENT NO. 21-0052 21-0057 21-0137 ...

Page 11

... 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. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 11 © 2008 Maxim Integrated Products DESCRIPTION is a registered trademark of Maxim Integrated Products, Inc ...

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