MAX4773EUT-T Maxim Integrated, MAX4773EUT-T Datasheet

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MAX4773EUT-T

Manufacturer Part Number
MAX4773EUT-T
Description
Power Switch ICs - Power Distribution
Manufacturer
Maxim Integrated
Datasheet
1.MAX4772EUT-T.pdf (10 pages)

Specifications of MAX4773EUT-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-23-6
Minimum Operating Temperature
- 40 C
The MAX4772/MAX4773 switches feature selectable
internal current limiting to prevent damage to host
devices due to faulty load conditions. The
MAX4772/MAX4773 include a logic input to select a
guaranteed 200mA or 500mA current limit, making them
ideal for SDIO and other load-switching applications.
These analog switches have a low 0.2Ω on-resistance
and operate from a 2.0V to 4.5V input voltage range.
When the switch is on and a load is connected to the
port, a guaranteed blanking time of 14ms ensures that
the transient voltage settles down. If, after this blanking
time, the load current is greater than the current limit,
the MAX4772 switch is turned off and issues a FLAG to
the microprocessor. The switch can be turned on again
by cycling the power or the ON input.
The MAX4773 has an autoretry feature where the switch
turns off and issues a FLAG to the microprocessor 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 and FLAG
deasserts.
The MAX4772/MAX4773 are available in tiny space-sav-
ing 6-pin SOT23 and 6-pin TDFN (3mm x 3mm) pack-
ages.
19-2926; Rev 0; 7/03
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
SEL
Typical Operating Circuit
2.0V TO 4.5V
________________________________________________________________ Maxim Integrated Products
MAX4772
MAX4773
GND
IN
General Description
FLAG
OUT
TO SDIO PORT
Applications
µP
200mA/500mA Selectable
Current-Limit Switches
o Guaranteed Current Limit: 200mA or 500mA
o Thermal-Shutdown Protection
o Reverse-Current Protection
o 0.2Ω On-Resistance (SEL = High)
o 14ms Guaranteed Blanking Time
o FLAG Function
o Autoretry (MAX4773)
o 80µA Supply Current
o 6µA Latch-Off Current (MAX4772)
o 0.01µA Shutdown Current
o 2.0V 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.
MAX4772EUT-T
MAX4772ETT*
MAX4773EUT-T
MAX4773ETT*
MAX4772EUK-T
MAX4772ETT
MAX4773EUK-T
MAX4773ETT
TOP VIEW
GND
ON
IN
PART
1
2
3
PART
MAX4772
MAX4773
SOT23
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
6
5
4
Ordering Information
OUT
SEL
FLAG
Pin Configurations
OUT
SEL
Selector Guide
IN
PIN-
PACKAGE
6 SOT23-6
6 TDFN-EP**
6 SOT23-6
6 TDFN-EP**
1
2
3
AUTORETRY
MAX4772
MAX4773
TDFN
Features
Yes
Yes
No
No
6
5
4
MARK
ABND
ABNE
TOP
ON
GND
FLAG
—
—
1

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MAX4773EUT-T Summary of contents

Page 1

... Latch-Off Current (MAX4772) o 0.01µA Shutdown Current o 2.0V to 4.5V Supply Range o Fast Current-Limit Response Time o Tiny SOT23 and TDFN Packages o UL Certification Pending PART MAX4772EUT-T MAX4772ETT* MAX4773EUT-T MAX4773ETT* Applications *Future product—contact factory for availability. **EP—Exposed pad. MAX4772EUK-T MAX4772ETT MAX4773EUK-T MAX4773ETT TOP VIEW µ ...

Page 2

Selectable Current-Limit Switches ABSOLUTE MAXIMUM RATINGS IN, ON, FLAG, SEL, OUT to GND.............................-0.3V to +6V OUT Short Circuit to GND .................................Internally Limited Continuous Power Dissipation (T = +70°C) A 6-Pin SOT23 (derate 8.7mW/°C above +70°C)............696mW 6-Pin TDFN (derate 24.4mW/°C ...

Page 3

ELECTRICAL CHARACTERISTICS (continued +2.0V to +4.5V -40°C to +85°C, unless otherwise noted. Typical values are PARAMETER SYMBOL Short-Circuit Current-Limit Response Time Retry Time (Note 5) Note 1: All parts are 100% tested ...

Page 4

Selectable Current-Limit Switches (V = 3.3V +25°C, unless otherwise noted SHUTDOWN REVERSE LEAKAGE CURRENT vs. TEMPERATURE 0V 4.5V ON OUT 1 0.1 0.01 0.001 0.0001 -40 - ...

Page 5

T = +25°C, unless otherwise noted REVERSE CURRENT LIMIT 1µ 1µF OUT V = 3.3V SEL 200µs/div SWITCH TURN-OFF TIME RESPONSE 3. 40ns/div ...

Page 6

Selectable Current-Limit Switches IN ON LOGIC SEL Figure 1. Functional Diagram Detailed Description The MAX4772/MAX4773 are forward/reverse current- limited switches that operate from a 2.0V to 4.5V input voltage range and guarantee a 200mA or 500mA mini- mum current-limit ...

Page 7

≥ 200mA V SEL I SEL Figure 2. MAX4772/MAX4773 Power-Up Sequence (V after Power-Up) Reverse-Current Protection The MAX4772/MAX4773 limit the reverse current ( from exceeding the maximum shut off and ...

Page 8

Selectable Current-Limit Switches BLANK RETRY BLANK LOAD CURRENT ON SWITCH STATUS OFF FLAG PIN STATUS Figure 4. MAX4773 Autoretry Fault-Blanking Diagram The autoretry feature saves system power in the case of an overcurrent or short-circuit condition. ...

Page 9

Output Capacitance Connect a 0.1µF capacitor from OUT to GND. This capacitor helps prevent inductive parasitics from pulling OUT negative during turn-off, thus preventing the ...

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

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