MAX4796EUK-T Maxim Integrated, MAX4796EUK-T Datasheet

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MAX4796EUK-T

Manufacturer Part Number
MAX4796EUK-T
Description
Power Switch ICs - Power Distribution
Manufacturer
Maxim Integrated
Datasheet
1.MAX4796EUK-T.pdf (9 pages)

Specifications of MAX4796EUK-T

Number Of Outputs
1
Operating Supply Voltage
2 V to 4.5 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Package / Case
SOT-23-5
Minimum Operating Temperature
- 40 C
The MAX4795–MAX4798 family of switches feature inter-
nal 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 a 2.0V
to 4.5V input voltage range. They are available with guar-
anteed 450mA and 500mA current 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 the
transient voltages settle down. If after this blanking time,
the load current is greater than the current limit, the
MAX4795 and MAX4797 switches are turned off and
FLAG is issued to the microprocessor. The switch can be
turned on again by cycling the power or the ON input.
The MAX4796 and MAX4798 have an autoretry feature
where the switch turns off and issues a FLAG to the
microprocessor after the blanking time and then contin-
uously checks to see if the overload condition is pre-
sent. The switch remains on after the overload condition
disappears and FLAG deasserts.
The MAX4795–MAX4798 are available in tiny, space-
saving, 5-pin SOT23 and 6-pin TDFN (3mm x 3mm)
packages.
19-2944; Rev 0; 8/03
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.
SDIO
PDAs and Palmtop Devices
Cell Phones
GPS Systems
Hand-Held Devices
ON
Typical Operating Circuit
+2.0V TO +4.5V
MAX4795
MAX4796
MAX4797
MAX4798
________________________________________________________________ Maxim Integrated Products
GND
IN
General Description
450mA/500mA Current-Limit Switches
FLAG
OUT
TO SDIO PORT
Applications
µP
o Guaranteed Current Limit: 450mA and 500mA
o Thermal-Shutdown Protection
o Reverse-Current Protection
o 0.2Ω On-Resistance
o 14ms Guaranteed Blanking Time
o FLAG Function
o Autoretry (MAX4796/MAX4798)
o 80µA Supply Current
o 6µA Latchoff Current
o 0.01µA Shutdown Current
o +2V to +4.5V Supply Range
o Fast Current-Limit Response Time
o Tiny SOT23 and TDFN Packages
o UL Certification Pending
*Future product—contact factory for availability.
**EP = Exposed pad.
Selector Guide appears at end of data sheet.
MAX4795EUK-T
MAX4795ETT*
MAX4796EUK-T
MAX4796ETT*
MAX4797EUK-T
MAX4797ETT*
MAX4798EUK-T
MAX4798ETT*
TOP VIEW
(MAX4795/MAX4797)
GND
PART
ON
IN
1
2
3
MAX4795
MAX4796
MAX4797
MAX4798
SOT23
-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
-40°C to +85°C
TEMP RANGE
40°C to +85°C
Ordering Information
5
4
OUT
FLAG
Pin Configurations
OUT
N.C.
IN
1
2
3
PIN-
PACKAGE
5 SOT23-5
6 TDFN-EP**
5 SOT23-5
6 TDFN-EP**
5 SOT23-5
6 TDFN-EP**
5 SOT23-5
6 TDFN-EP**
MAX4795
MAX4796
MAX4797
MAX4798
TDFN
Features
4
6
5
MARK
AEDK
AEDJ
AEDL
AEDI
ON
GND
FLAG
TOP
—
—
—
—
1

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MAX4796EUK-T Summary of contents

Page 1

... Shutdown Current o +2V to +4.5V Supply Range o Fast Current-Limit Response Time o Tiny SOT23 and TDFN Packages o UL Certification Pending PART MAX4795EUK-T Applications MAX4795ETT* MAX4796EUK-T MAX4796ETT* MAX4797EUK-T MAX4797ETT* MAX4798EUK-T MAX4798ETT* *Future product—contact factory for availability. **EP = Exposed pad. Selector Guide appears at end of data sheet. ...

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 5-Pin SOT23 (derate 7.1mW/°C above +70°C)............571mW 6-Pin TDFN (derate 24.4mW/°C above ...

Page 3

Current-Limit Switches (V = 3.3V +25°C, unless otherwise noted QUIESCENT SUPPLY CURRENT vs. SUPPLY VOLTAGE 160 140 120 100 2.0 2.5 3.0 3.5 4.0 SUPPLY ...

Page 4

Current-Limit Switches (V = 3.3V +25°C, unless otherwise noted FORWARD CURRENT LIMIT vs. SUPPLY VOLTAGE 650 OUT = GND 625 MAX4797/MAX4798 600 575 550 MAX4795/MAX4796 525 500 2.0 2.5 3.0 3.5 4.0 4.5 SUPPLY VOLTAGE ...

Page 5

Current-Limit Switches (V = 3.3V +25°C, unless otherwise noted SWITCH TURN-OFF TIME RESPONSE 3. 40ns/div Pin Description PIN NAME SOT23 TDFN Input. Bypass with a 0.1µF ceramic capacitor to ground. ...

Page 6

Current-Limit Switches Detailed Description The MAX4795–MAX4798 are forward/reverse current- limited switches that operate from 4.5V input voltage range and guarantee a 450mA and 500mA minimum current-limit threshold for different options. The voltage drop across an internal ...

Page 7

Current-Limit Switches Autoretry (MAX4796/MAX4798) When the forward or reverse current-limit threshold is exceeded, t timer begins counting (Figure 2). BLANK The timer resets if the overcurrent condition disappears before t has elapsed. A retry time delay, t BLANK is ...

Page 8

... Place input and output capacitors as close as possible to the device (no more than 5mm). IN and OUT pins must be connected with short traces to the power bus. Selector Guide CURRENT LIMIT PART (mA) MAX4795EUK-T 450 MAX4795ETT 450 MAX4796EUK-T 450 MAX4796ETT 450 MAX4797EUK-T 500 MAX4797ETT 500 MAX4798EUK-T 500 MAX4798ETT 500 ...

Page 9

... 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 _____________________ 9 © 2003 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products ...

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