IC SW USB DUAL W/FB 10-UMAX

MAX1812EUB+

Manufacturer Part NumberMAX1812EUB+
DescriptionIC SW USB DUAL W/FB 10-UMAX
ManufacturerMaxim Integrated Products
MAX1812EUB+ datasheet
 


Specifications of MAX1812EUB+

ApplicationsUSB, PeripheralsCurrent - Supply45µA
Voltage - Supply4 V ~ 5.5 VOperating Temperature-40°C ~ 85°C
Mounting TypeSurface MountPackage / Case10-MSOP, Micro10™, 10-uMAX, 10-uSOP
Maximum Operating Temperature+ 85 CMinimum Operating Temperature- 40 C
Mounting StyleSMD/SMTLead Free Status / RoHS StatusLead free / RoHS Compliant
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19-1865; Rev 0; 11/00
Dual USB Switch with Fault Blanking
General Description
The MAX1812 is a dual current-limited switch specifi-
cally made for USB applications. Each channel is guar-
anteed to supply 500mA and meets USB specifications.
The MAX1812’s low quiescent supply current (45µA)
and shutdown current (3µA) conserve battery power in
portable applications.
The MAX1812 has multiple safety features to ensure
that the USB port is protected. Built-in thermal-overload
protection limits power dissipation and junction temper-
ature. The device also has accurate internal current-lim-
iting circuitry to protect the input supply against both
overload and short-circuit conditions. Independent fault
signals (FAULTA and FAULTB) notify the microproces-
sor when a thermal-overload, current limit, undervoltage
lockout, or short-circuit fault occurs. A 20ms fault-blank-
ing feature enables the circuit to ignore momentary
faults, such as those caused when hot-swapping a
capacitive load, thereby preventing false alarms to the
host system.
The MAX1812 is available in a space-saving 10-pin
µMAX package. For single versions of this device, refer
to the MAX1693, MAX1694, and MAX1607 data sheets.
________________________Applications
USB Ports
USB Hubs
Notebook Computers
Desktop Computers
PDAs and Palmtop Computers
Docking Stations
Typical Operating Circuit
INA
IN
INPUT
INB
4.0V TO 5.5V
MAX1812
FAULTA
FAULTB
ONA
ONA
ONB
ONB
GND
________________________________________________________________ Maxim Integrated Products
For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
o Dual USB Switch in Tiny 10-Pin µMAX Package
o Guaranteed 500mA Load per Channel
o Built-In 20ms Fault Blanking
o Compliant to USB Specifications
o +4.0V to +5.5V Input Voltage Range
o 45µA Quiescent Current
o 3µA Shutdown Current
o Independent Shutdown Control
o Independent FAULT Indicator Outputs
o Thermal-Overload Protection
o UL Listing Pending
PART
MAX1812EUB
TOP VIEW
USB
OUTA
PORT A
USB
OUTB
PORT B
Features
Ordering Information
TEMP. RANGE
PIN-PACKAGE
10 µMAX
-40°C to +85°C
Pin Configuration
ONA
1
10
FAULTA
INA
2
9
OUTA
MAX1812
IN
3
8
GND
INB
4
7
OUTB
ONB
5
6
FAULTB
µMAX
1

MAX1812EUB+ Summary of contents

  • Page 1

    ... ONA ONA ONB ONB GND ________________________________________________________________ Maxim Integrated Products For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. o Dual USB Switch in Tiny 10-Pin µMAX Package o Guaranteed 500mA Load per Channel o Built-In 20ms Fault Blanking o Compliant to USB Specifications o +4 ...

  • Page 2

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

  • Page 3

    Dual USB Switch with Fault Blanking ELECTRICAL CHARACTERISTICS (continued 5V -40°C to +85°C, unless otherwise noted. Typical values are INA INB A PARAMETER SYMBOL Logic Input High Voltage Logic ...

  • Page 4

    Dual USB Switch with Fault Blanking ( 5V, Circuit of Figure INA INB OUT_ LEAKAGE CURRENT vs. TEMPERATURE 1000 ONA ONB IN 100 10 1 0.1 -40 ...

  • Page 5

    Dual USB Switch with Fault Blanking ( 5V, Circuit of Figure INA INB SHORT-CIRCUIT RESPONSE INTO 0Ω MAX1812- FAULT RECOVERS LOAD REMOVED D 10ms/div ...

  • Page 6

    Dual USB Switch with Fault Blanking PIN NAME Control Input for Switch A. Can be driven higher than IN_ without damage. A logic low turns switch A ONA 1 on. INA, IN, Power Input. Connect all IN_ pins together and ...

  • Page 7

    Dual USB Switch with Fault Blanking ONA 4.0V TO 5.5V IN_ 0.1µF ONB MAX1812 Figure 1. Functional Diagram FAULT_ goes low when any of the following conditions occur: • The input voltage is below the undervoltage-lockout (UVLO) threshold. • The ...

  • Page 8

    Dual USB Switch with Fault Blanking Table 1. MAX1812 Current Limiting and Fault Behavior CONDITION If a short circuit is present at startup, current will ramp up to ISHORT in 2ms–3ms, and the switch will shut off. The blanking timer ...

  • Page 9

    Dual USB Switch with Fault Blanking INA IN INPUT INB 4.0V TO 5.5V MAX1812 FAULTA FAULTB ONA ONA ONB ONB GND Figure 2. Typical Application Circuit the switch pulses the output current at 0.35A RMS until the output voltage rises ...

  • 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 © 2000 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products ...