IC SW USB DUAL W/FB 10-UMAX

MAX1823BEUB+T

Manufacturer Part NumberMAX1823BEUB+T
DescriptionIC SW USB DUAL W/FB 10-UMAX
ManufacturerMaxim Integrated Products
MAX1823BEUB+T datasheet
 


Specifications of MAX1823BEUB+T

ApplicationsUSB, PeripheralsCurrent - Supply50µA
Voltage - Supply4 V ~ 5.5 VOperating Temperature-40°C ~ 85°C
Mounting TypeSurface MountPackage / Case10-MSOP, Micro10™, 10-uMAX, 10-uSOP
Lead Free Status / RoHS StatusLead free / RoHS Compliant  
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19-1903; Rev 3; 10/03
General Description
The MAX1823 is a dual, current-limited switch with
autoreset specifically made for USB applications. The
autoreset feature latches the switch off if the output is
shorted, saving system power. The switch reactivates
when the short circuit is removed. Each channel is guar-
anteed to supply 720mA and meet USB specifications.
Low quiescent supply current (50µA) and standby current
(3µA) conserve battery power in portable applications.
The MAX1823 has multiple safety features to ensure
that the USB port is protected. Built-in thermal-overload
protection limits power dissipation and junction temper-
ature. Accurate internal current-limiting circuitry pro-
tects the input supply against both overload and
short-circuit conditions. Independent fault signals
(FAULTA and FAULTB) notify the microprocessor (µP)
when a thermal-overload, current-limit, undervoltage-
lockout (UVLO), or short-circuit fault occurs. A 20ms
fault-blanking feature ignores momentary faults, such
as those caused when hot swapping a capacitive load,
preventing false alarms to the host system. The
MAX1823A/MAX1823B also block reverse current (cur-
rent from OUT_ to IN_) while in shutdown.
The MAX1823 is available in a space-saving 10-pin
µMAX package. The MAX1823/MAX1823A are enabled
with an active-low signal, and the MAX1823B/MAX1823H
are enabled with an active-high signal. For a single ver-
sion of this device, refer to the MAX1946 data sheet. For
a triple version, refer to the MAX1940 data sheet.
USB Ports and Hubs
Notebook and Desktop Computers
PDAs and Palmtop Computers
Docking Stations
Pin Configuration
TOP VIEW
*(ONA) ONA
1
INA
2
MAX1823
IN
3
MAX1823A
MAX1823B
INB
4
MAX1823H
*(ONB) ONB
5
MAX
*( ) ARE FOR MAX1823B/MAX1823H.
________________________________________________________________ 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.
Dual USB Switch with Fault
Blanking and Autoreset
o Dual USB Switch in Tiny 10-Pin µMAX Package
o Autoreset Feature Saves Power
o Guaranteed 720mA Load per Channel
o Built-In 20ms Fault Blanking
o Compliant to USB Specification
o Blocks Reverse Current in Shutdown
(MAX1823A/MAX1823B)
o 4V to 5.5V Input Voltage Range
o Independent Shutdown Control
(MAX1823/MAX1823A—Active Low)
(MAX1823B/MAX1823H—Active High)
o Independent FAULT Indicator Outputs
o Thermal-Overload Protection
o 50µA Quiescent Current (Both Switches On)
o 3µA Standby Current
o UL Recognized
PART
MAX1823EUB
MAX1823AEUB
MAX1823BEUB
Applications
MAX1823HEUB
INPUT
4V TO 5.5V
10
FAULTA
9
OUTA
8
GND
7
OUTB
6
FAULTB
Features
Ordering Information
TEMP RANGE
PIN-PACKAGE
-40°C to +85°C
10 µMAX
-40°C to +85°C
10 µMAX
-40°C to +85°C
10 µMAX
-40°C to +85°C
10 µMAX
Typical Operating Circuit
USB
INA
OUTA
PORT A
IN
INB
MAX1823
MAX1823A
USB
FAULTA
OUTB
PORT B
FAULTB
ONA
ONA
ONB
ONB
GND
1

MAX1823BEUB+T Summary of contents

  • Page 1

    ... MAX1823H *(ONB) ONB 5 MAX *( ) ARE FOR MAX1823B/MAX1823H. ________________________________________________________________ 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. Dual USB Switch with Fault Blanking and Autoreset o Dual USB Switch in Tiny 10-Pin µMAX Package ...

  • Page 2

    Dual USB Switch with Fault Blanking and Autoreset ABSOLUTE MAXIMUM RATINGS IN, INA, INB, ONA, ONB, ONA, ONB OUTA, OUTB to GND ...........................................-0.3V to +6V FAULTA, FAULTB to GND..........................-0. MAX1823/MAX1823H, INA OUTA; INB OUTB ...

  • Page 3

    ELECTRICAL CHARACTERISTICS (continued) = 5V, ONA = ONB = GND (MAX1823/MAX1823A), ONA = ONB = IN (MAX1823B/MAX1823H), (Circuit of Figure INA INB +85 C, unless otherwise noted. Typical ...

  • Page 4

    Dual USB Switch with Fault Blanking and Autoreset ELECTRICAL CHARACTERISTICS (Circuit of Figure (MAX1823B/MAX1823H +85 C, unless otherwise noted.) (Note 2) PARAMETER SYMBOL Supply Voltage ...

  • Page 5

    ELECTRICAL CHARACTERISTICS (continued) (Circuit of Figure (MAX1823B/MAX1823H +85 C, unless otherwise noted.) (Note 2) PARAMETER SYMBOL Logic Input High Voltage Logic Input Low Voltage Logic ...

  • Page 6

    Dual USB Switch with Fault Blanking and Autoreset = 5V, ON_ = GND (MAX1823/MAX1823A), ON_ = IN_ (MAX1823B/MAX1823H), T (Circuit of Figure INA INB unless otherwise noted.) SWITCH OFF-LEAKAGE vs. TEMPERATURE 1000 100 ...

  • Page 7

    Figure INA INB unless otherwise noted.) AUTORESET CURRENT vs. INPUT VOLTAGE (MAX1823/MAX1823H - + + ...

  • Page 8

    Dual USB Switch with Fault Blanking and Autoreset = 5V, ON_ = GND (MAX1823/MAX1823A), ON_ = IN_ (MAX1823B/MAX1823H), T (Circuit of Figure INA INB unless otherwise noted.) SWITCH TURN-OFF TIME ( ...

  • Page 9

    Detailed Description The MAX1823 is a dual, current-limited switch designed for USB applications. It has two independent switches, each with its own enable control input and autoreset function. Each switch has an error-flag output to notify the USB controller when ...

  • Page 10

    Dual USB Switch with Fault Blanking and Autoreset After the fault condition is removed, the FAULT_ output deasserts after a 20ms delay. Ensure that the MAX1823 has adequate input bypass capacitance to prevent glitches from triggering FAULT_ outputs. Input glitches ...

  • Page 11

    Table 1. MAX1823 Current Limiting and Fault Behavior CONDITION • An output short circuit ramps the current to I blanking timer turns on, FAULT_ stays high, and the output current pulses at 0.35A • Removing the short circuit before the ...

  • Page 12

    Dual USB Switch with Fault Blanking and Autoreset Turn-On and Turn-Off Behavior In the absence of faults, the MAX1823’s internal switches turn on and off slowly under the control of the ON_ inputs. Transition times for both edges are provided ...

  • Page 13

    ... 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 ____________________ 13 © 2003 Maxim Integrated Products ...