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MAX1823BEUB+T

P1-P3P4-P6P7-P9P10-P12P13-P13
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.
Applications
USB Ports and Hubs
Notebook and Desktop Computers
PDAs and Palmtop Computers
Docking Stations
Features
♦ Dual USB Switch in Tiny 10-Pin µMAX Package
♦ Autoreset Feature Saves Power
♦ Guaranteed 720mA Load per Channel
♦ Built-In 20ms Fault Blanking
♦ Compliant to USB Specification
♦ Blocks Reverse Current in Shutdown
(MAX1823A/MAX1823B)
♦ 4V to 5.5V Input Voltage Range
♦ Independent Shutdown Control
(MAX1823/MAX1823A—Active Low)
(MAX1823B/MAX1823H—Active High)
♦ Independent FAULT Indicator Outputs
♦ Thermal-Overload Protection
♦ 50µA Quiescent Current (Both Switches On)
♦ 3µA Standby Current
♦ UL Recognized
MAX1823/MAX1823A/MAX1823B/MAX1823H
Dual USB Switch with Fault
Blanking and Autoreset
________________________________________________________________ Maxim Integrated Products 1
Ordering Information
Typical Operating Circuit
19-1903; Rev 3; 10/03
PART TEMP RANGE PIN-PACKAGE
MAX1823EUB -40°C to +85°C 10 µMAX
MAX1823AEUB -40°C to +85°C 10 µMAX
MAX1823BEUB -40°C to +85°C 10 µMAX
MAX1823HEUB -40°C to +85°C 10 µMAX
Pin Configuration
ONBONB
ONAONA
GND
MAX1823
MAX1823A
FAULTB
FAULTA
IN
INA
INB
USB
PORT A
OUTA
USB
PORT B
OUTB
INPUT
4V TO 5.5V
1
2
3
4
5
10
9
8
7
6
OUTA
GND
OUTBINB
IN
INA
MAX1823
MAX1823A
MAX1823B
MAX1823H
µMAX
TOP VIEW
*(ONA) ONA
*(ONB) ONB
*( ) ARE FOR MAX1823B/MAX1823H.
FAULTB
FAULTA
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.
MAX1823/MAX1823A/MAX1823B/MAX1823H
Dual USB Switch with Fault
Blanking and Autoreset
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
IN, INA, INB, ONA, ONB, ONA, ONB
OUTA, OUTB to GND ...........................................-0.3V to +6V
FAULTA, FAULTB to GND..........................-0.3V to (V
IN_
+ 0.3V)
MAX1823/MAX1823H, INA, IN to OUTA;
INB, IN to OUTB ...................................................-0.3V to +6V
MAX1823A/MAX1823B, INA, IN to OUTA;
INB, IN to OUTB (when disabled, Note 3)...............-6V to +6V
INA, IN to OUTA; INB, IN to OUTB
(when enabled, Note 4)..............................-1.5A to +1.5A
RMS
FAULTA, FAULTB Current .................................................20mA
Continuous Power Dissipation (T
A
= +70°C)
10-Pin µMAX (derate 5.6mW/°C above +70°C) ...........444mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Supply Voltage Range 4.0 5.5 V
T
A
= +25°C, each switch,
MAX1823/MAX1823H
75 105
T
A
= +25°C, each switch,
MAX1823A/MAX1823B
90 120
T
A
= 0°C to +85°C, each switch,
MAX1823/MAX1823H
135
Switch On-Resistance R
ON
T
A
= 0°C to +85°C, each switch,
MAX1823A/MAX1823B
165
mΩ
Standby Supply Current
ON_ = IN_ (MAX1823/MAX1823A), ON_ =
GND (MAX1823B/MAX1823H)
310µA
I
OUTA
= I
OUTB
= 0A, one channel on 40 80
Quiescent Supply Current
I
OUTA
= I
OUTB
= 0A, both channels on 50 100
µA
ON_ = IN _ ( MAX 1823/M AX1823A), ON _ = GND
(M AX1823B/M AX1823H), V
OUTA
= V
OUTB
= 0V,
T
A
= +25
o
C
0.02 1.00
OUT_ Off-Leakage Current
ON_ = IN_ (MAX1823/MAX1823A), ON_ =
GND (MAX1823B/MAX1823H),
V
OUTA
= V
OUTB
= 0V, T
A
= 0
o
C to +85
o
C
0.02 10.00
µA
Undervoltage-Lockout Threshold V
UVLO
Rising edge, 3% hysteresis 3.0 3.4 3.8 V
Continuous Load Current 720 mA
Continuous Current Limit I
LIM
V
IN
- V
OUT_
= 0.5V 0.72 0.90 1.20 A
V
OUT_
= 0V (I
OUT
pulsing) 0.8 1.2 1.6 A
PEAK
Short-Circuit Current Limit I
SHORT
V
OUT_
= 0V (I
OUT
pulsing) 0.35 A
RMS
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 1, V
IN
= V
INA
= V
INB
= 5V, ONA = ONB = GND (MAX1823/MAX1823A), ONA = ONB = IN (MAX1823B/MAX1823H),
T
A
= 0°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.)
MAX1823/MAX1823A/MAX1823B/MAX1823H
Dual USB Switch with Fault
Blanking and Autoreset
_______________________________________________________________________________________ 3
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Short-Circuit Detect Threshold (Note 1) 1 V
Continuous Current-Limit
Blanking Timeout Period
From continuous current-limit condition to
FAULT_ assertion
10 20 35 ms
Short-Circuit Blanking Timeout
Period
From short-circuit current-limit condition to
FAULT_ assertion
7.5 18 35.0 ms
MAX1823/MAX1823H 0.5 1.2 4.0
Turn-On Delay t
ON
R
OUT_
= 10kΩ,
does not include
rise time
MAX1823A/MAX1823B 0.3 0.8 3.0
ms
Output Rise Time t
RISE
R
OUT_
= 10Ω, from 10% to 90% of V
OUT_
2.5 ms
R
OUT
_ = 10Ω, does not include fall time (from
ON_ (MAX1823) or ON_ (MAX1823H)
deasserted to V
OUT
= 90% of V
IN_
)
0.8 3.0
Turn-Off Delay from ON t
OFF
R
OUT
_ = 10Ω, does not include fall time (from
ON_ (MAX1823A) or ON_ (MAX1823B)
deasserted to V
OUT
= 90% of V
IN_
)
0.1 3.0
ms
R
OUT_
= 10Ω, from 90% to 10% of V
OUT_
(MAX1823/MAX1823H)
2.5
Output Fall Time t
FALL
R
OUT_
= 10Ω, from 90% to 10% of V
OUT_
(MAX1823A/MAX1823B)
2.8
ms
Thermal-Shutdown Threshold 15
o
C hysteresis +160
o
C
Logic Input High Voltage V
IN_
= 4V to 5.5V 2 V
Logic Input Low Voltage V
IN_
= 4V to 5.5V 0.8 V
Logic Input Current
ON_ = GND or IN_ (MAX1823/MAX1823A),
ON_ = GND or IN_ (MAX1823B/MAX1823H)
-1 +1 µA
FAULT_ Output Low Voltage I
SINK
= 1mA, V
IN
_ = 4V 0.4 V
FAULT_ Output High Leakage
Current
V
IN
_ = V
FAULT_
= 5.5V 1 µA
Autoreset OUT_ Current In latched-off state, V
OUT_
= 0V 10 30 45 mA
Autoreset Threshold In latched-off state, rising 0.4 0.5 0.6 V
Autoreset Blanking Time In latched-off state, V
OUT_
> 0.5V 10 20 35 ms
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, V
IN
= V
INA
= V
INB
= 5V, ONA = ONB = GND (MAX1823/MAX1823A), ONA = ONB = IN (MAX1823B/MAX1823H),
T
A
= 0°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.)
P1-P3P4-P6P7-P9P10-P12P13-P13

MAX1823BEUB+T

Mfr. #:
Buy MAX1823BEUB+T
Manufacturer:
Maxim Integrated
Description:
Power Switch ICs - Power Distribution Dual USB Switch w/Fault Blank
Lifecycle:
New from this manufacturer.
Delivery:
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