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PDF MAX1562HESA Data sheet ( Hoja de datos )
| Número de pieza | MAX1562HESA | |
| Descripción | Programmable 4A USB Current-Limited Switches with Autoreset and Fault Blanking | |
| Fabricantes | Maxim Integrated | |
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19-2631; Rev 0; 7/03
EVAALVUAAILTAIOBNLEKIT Programmable 4A USB Current-Limited
Switches with Autoreset and Fault Blanking
General Description
The MAX1562/MAX1562H/MAX1563 single current-
limited switches provide up to 4A to power up to eight
USB ports. They operate from a 4V to 5.5V input
supply and consume only 40µA of quiescent current
when operating and only 3µA in shutdown.
The MAX1562/MAX1562H/MAX1563s’ autoreset feature
latches the switch off if the output is shorted, thereby
saving system power. When the short is removed, the
switch is reactivated. A fault-blanking feature enables the
circuit to ignore momentary faults, such as those caused
when hot swapping a capacitive load, preventing false
alarms to the host system. Fault blanking also prevents
fault signals from being issued when the device powers
up the load.
The MAX1562/MAX1562H/MAX1563 provide several
safety features to protect the USB port. Built-in thermal-
overload protection turns off the switch when the die
temperature exceeds +160°C. Accurate internal cur-
rent-limiting circuitry protects the input supply against
both overload and short-circuit conditions. An open-
drain fault signal (FAULT) notifies the microprocessor
when a thermal-overload, current-limit, undervoltage
lockout (UVLO), or short-circuit fault occurs.
The MAX1562 has an active-low ON, and the
MAX1562H has an active-high ON enable input. The
MAX1563 has a selectable active-high or active-low
logic-controlled enable. The current limit is pro-
grammed from 1A to 4A using a resistor.
The MAX1562/MAX1562H are available in 8-pin SO
packages and are pin-compatible upgrades to the
MIC2545A/MIC2549A. The MAX1563 provides the
same features and higher current performance in a
smaller 12-pin (4mm x 4mm) QFN package. These
devices operate over an extended temperature range
(-40°C to +85°C). An evaluation kit is available to speed
designs.
Applications
Notebook Computers
Desktop Computers
USB Ports and Hubs
PDAs and Palmtop Computers
Docking Stations
Features
o Programmable Current Limit (1A to 4A) with
Resistor
o Autoreset Feature Saves System Power
o 20ms Fault-Blanking Circuitry
o Active-High/Low Control Logic
o Fault-Indicator Output
o Thermal-Overload Protection
o Smaller 4mm x 4mm QFN Package (MAX1563)
o 3µA Shutdown Current
o UL Certification Pending
PART
MAX1562ESA
MAX1562HESA
MAX1563ETC
Ordering Information
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
8 SO
8 SO
12 QFN 4mm x 4mm
Typical Operating Circuit
INPUT
4V TO 5.5V
ACTIVE-HIGH/ACTIVE-LOW
SELECTABLE
IN
FAULT
IN
MAX1562
MAX1562H
ON MAX1563
SEL
MAX1563
ONLY
OUT
ISET OUT
GND
USB
PORT
Pin Configurations appear at end of data sheet.
________________________________________________________________ Maxim Integrated Products 1
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.
1 page  
Programmable 4A USB Current-Limited
Switches with Autoreset and Fault Blanking
Typical Operating Characteristics (continued)
(VIN = +5V, CIN = 1µF, COUT = 4.7µF, TA = +25°C, unless otherwise noted.)
NORMALIZED RON vs. TEMPERATURE
1.3
1.2
1.1
1.0
0.9
0.8
0.7
-40
-15 10 35 60
TEMPERATURE (°C)
85
TURN-OFF TIME vs. TEMPERATURE
(tOFF + tFALL)
3.0
RLOAD = 2Ω
2.5
2.0
1.5
1.0
0.5
0
-40
-15 10 35 60
TEMPERATURE (°C)
85
NORMALIZED CONTINUOUS
CURRENT LIMIT vs. TEMPERATURE
1.03
1.02
1.01
1.00
0.99
0.98
0.97
0.96
-40
-15 10 35 60
TEMPERATURE (°C)
85
22.0
21.8
21.6
21.4
21.2
21.0
20.8
20.6
20.4
20.2
20.0
-40
FAULT-BLANKING TIME
vs. TEMPERATURE
-15 10 35 60
TEMPERATURE (°C)
85
TURN-ON TIME vs. TEMPERATURE
3.0
RLOAD = 2Ω
2.5
2.0
1.5
1.0
0.5
0
-40
40
-15 10 35 60
TEMPERATURE (°C)
AUTORESET CURRENT
vs. TEMPERATURE
85
30
20
10
0
-40
-15 10 35 60
TEMPERATURE (°C)
85
AUTORESET CURRENT vs. VCC
40
35
30
25
20
15
10
5
0
4.0 4.3 4.6 4.9 5.2 5.5
VCC (V)
OVERLOAD RESPONSE INTO 1.4Ω
MAX1562 toc11
SHORT-CIRCUIT RESPONSE INTO 0Ω
MAX1562 toc12
VIN 5V/div VIN 5V/div
VOUT
FAULT
IOUT
20ms/div
VOUT
5V/div
VFAULT
5V/div
IOUT
2A/div
TIME (10ms/div)
5V/div
5V/div
10A/div
_______________________________________________________________________________________ 5
5 Page 
Programmable 4A USB Current-Limited
Switches with Autoreset and Fault Blanking
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/packages.)
PACKAGE OUTLINE
12,16,20,24L QFN, 4x4x0.90 MM
21-0106
E
1
2
PACKAGE OUTLINE
12,16,20,24L QFN, 4x4x0.90 MM
21-0106
E
2
2
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet MAX1562HESA.PDF ] | |
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