MAX4917B Maxim, MAX4917B Datasheet

no-image

MAX4917B

Manufacturer Part Number
MAX4917B
Description
The MAX4914B/MAX4915A/B/MAX4917A/B family of switches feature internal current limiting to prevent damage to host devices due to faulty load conditions
Manufacturer
Maxim
Datasheet
The MAX4914B/MAX4915A/B/MAX4917A/B family of switch-
es 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 a 2.3V
to 5.5V input voltage range. They are available with guaran-
teed 100mA, 200mA, and 300mA 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 that
the transient voltages settle down. If after this blanking
time the load current is greater than the current limit,
the MAX4914B/MAX4915B/MAX4917B latchoff versions
enter a latchoff 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 MAX4915A/MAX4917A 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 turns on and remains on after
the overload condition disappears and FLAG deasserts.
The MAX4914B is available in the tiny 6-pin µDFN
(2mm x 2mm) package, while the MAX4915A/B
and MAX4917A/B are available in both 6-pin µDFN
(2mm x 2mm) and space-saving 5-pin SOT23 pack-
ages. These devices operate over the -40°C to +85°C
extended temperature range.
19-0544; Rev 2; 6/08
Note: All devices are specified over the -40°C to +85°C operating temperature range.
* Future product—contact factory for availability.
+ Denotes a lead-free/RoHS-compliant package.
T = Tape-and-reel package.
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.
MAX4914BELT+T
MAX4915AELT+T
MAX4915AEUK+T*
MAX4915BELT+T
MAX4915BEUK+T*
MAX4917AELT+T
MAX4917AEUK+T*
MAX4917BELT+T
MAX4917BEUK+T*
PDAs and Palmtop
Devices
Cell Phones
GPS Systems
100mA/200mA/300mA Current-Limit Switches
PART
________________________________________________________________ Maxim Integrated Products
General Description
PIN-PACKAGE
5 SOT23
5 SOT23
5 SOT23
5 SOT23
with Low Shutdown Reverse Current
6 µDFN
6 µDFN
6 µDFN
6 µDFN
6 µDFN
Handheld Devices
SDIO
USB Ports
Notebook Computers
Applications
TOP MARK
AEYM
AEYN
AEYK
AEYP
ABG
ABN
ABF
ABL
ABI
Ordering Information/Selector Guide
♦ Guaranteed Current Limit: 100mA, 200mA, 300mA
♦ Thermal-Shutdown Protection
♦ Reverse Current Protection
♦ 0.2Ω On-Resistance
♦ 14ms Guaranteed Blanking Time
♦ FLAG Function
♦ 80µA Supply Current
♦ 8µA Latchoff Current
♦ Autoretry (MAX4915A/MAX4917A)
♦ 0.01µA Shutdown Current
♦ 2.3V to 5.5V Supply Range
♦ Undervoltage Lockout
♦ Fast Current-Limit Response Time (5µs)
♦ Low (0.1µA typ) Reverse Shutdown Current
♦ Tiny 6-Pin µDFN (2mm x 2mm) and 5-Pin SOT23
Pin Configurations and Typical Operating Circuit appear at
end of data sheet.
(MAX4914B/MAX4915B/MAX4917B)
Packages
CURRENT LIMIT (mA)
100
200
200
200
200
300
300
300
300
RETRY/LATCH-OFF
Autoretry
Autoretry
Autoretry
Autoretry
Latchoff
Latchoff
Latchoff
Latchoff
Latchoff
Features
1

Related parts for MAX4917B

MAX4917B Summary of contents

Page 1

... If after this blanking time the load current is greater than the current limit, the MAX4914B/MAX4915B/MAX4917B latchoff versions enter a latchoff 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 ...

Page 2

... OUT GND ON IN Rising edge T = +25° 95mA A OUT 40° 85° 95m MAX4914B/MAX4915B/MAX4917B V IH MAX4915A/MAX4917A MAX4914B/MAX4915B/MAX4917B V IL MAX4915A/MAX4917A +5.5V FLAG from low to high 10mA, ON OUT C = 0.1µF (Note +3.3V +25°C.) (Note 1) ...

Page 3

Current-Limit Switches with Low Shutdown Reverse Current ELECTRICAL CHARACTERISTICS (continued +2.3V to +5.5V -40°C to +85°C, unless otherwise noted. Typical values are PARAMETER SYMBOL Turn-Off Time Blanking Time t BLANK Short-Circuit ...

Page 4

Current-Limit Switches with Low Shutdown Reverse Current (V = 3.3V +25°C, unless otherwise noted NORMALIZED ON-RESISTANCE vs. TEMPERATURE 1 1.2 1.0 0.8 0.6 0.4 0.2 0 -40 - ...

Page 5

Current-Limit Switches with Low Shutdown Reverse Current (V = 3.3V +25°C, unless otherwise noted TURN-OFF RESPONSE 200ns/div PIN MAX4914A/B/ MAX4915A/B/ MAX4915A/B/ MAX4917A/B MAX4917A/B (SOT23) (µDFN ...

Page 6

... If the faulty load condition is not pre- sent, the switch remains on. During this retry time, FLAG remains low until the fault is removed. The MAX4914B/MAX4915B/MAX4917B do not have the autoretry option, and the switch remains in latchoff mode until the ON pin or the input power is cycled from high to low and then high again ...

Page 7

Current-Limit Switches with Low Shutdown Reverse Current Table 1. MAX4914B/MAX4915A/B/MAX4917A/B 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 MAX4915A/MAX4917A (autoretry versions); ...

Page 8

... ON SWITCH STATUS OFF IN PIN UVLO VOLTAGE FLAG PIN STATUS Figure 3. MAX4914B/MAX4915B/MAX4917B Latchoff Fault Blanking (MAX4914B/MAX4915B/MAX4917B) When the forward or reverse current-limit threshold is exceeded, the t timer begins counting. The timer BLANK resets if the overcurrent condition disappears before t has elapsed. The switch is shut off if the over- ...

Page 9

... RETRY TOP VIEW GND _______________________________________________________________________________________ Attention must be given to the MAX4914B/MAX4915B/ MAX4917B (latchoff versions), where the latchoff condi- tion must be manually reset by toggling ON from high to low. If the latchoff time duration is not sufficiently high possible for the device to reach the thermal- t shutdown threshold and never be able to turn the ...

Page 10

... Current-Limit Switches with Low Shutdown Reverse Current For the latest package outline information and land patterns www.maxim-ic.com/packages. PACKAGE TYPE 6 µDFN 5 SOT23 10 ______________________________________________________________________________________ Package Information PACKAGE CODE L622-1 U5-2 DOCUMENT NO. 21-0164 21-0057 ...

Page 11

... Changed V 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 © ...

Related keywords