CALMIRCO CM3513 Usb 2.4a overcurrent switch Datasheet

Preliminary
CM3513
CALIFORNIA MICRO DEVICES
USB 2.4A Overcurrent Switch
Features
•
•
•
•
•
•
•
•
Pin Diagram
High-side high current switch with active low Enable
Up to 2.4A continuous current on the output
Over-current limits at 2.4A min
10msec min fault blanking delay on OC# output
prevents false overcurrent alarms
Prevents backdrive current when host powered off
Low operating current (95µA typ.)
Low quiescent current when disabled (<1µA max)
Small 8-Lead SOIC package
GND
VCC
VCC
VOUT
TOP
VOUT
SOIC-8
VOUT
OC#
EN#
Applications
•
Desktop PCs, Notebooks and Set-Top-Boxes
Product Description
California Micro Devices’ CM3513 is a USB
overcurrent power switch that provides power to four
USB ports. The device has a power switch that
provides the VBUS voltage at the USB output ports
with minimal voltage drop. When the EN# pin is logic
low, the power switch is ON, and VCC is connected to
the output VOUT. When the EN# pin is logic high, the
power switch is OFF, and no power is available at
the output.
The power switch has full over-current protection.
Whenever the current limit of the switch is
exceeded, the device enters a constant-current
mode, where the output voltage is progressively
reduced to prevent the current from increasing
further. The OC# output becomes active low only if
the overcurrent condition exceeds at least 10ms.
This fault blanking delay prevents false alarms from
being reported to the host USB controller.
Typical Application Circuit
VCC
VOUT
VCC
VOUT
VCC
VOUT
EN#
VBUS
VBUS
2 USB Ports
2 USB Ports
OC#
Simplified Electrical Schematic
If the overcurrent condition is severe enough that
the part heats up to the thermal limit TMAX, then the
switch will be turned off and the temperature cools
down. At TMIN the switch then turns on again, and
the device heats up again, and so on, until the fault
is removed.
The CM3513 also prevents backdrive current
flowing into the host from the connected peripheral.
This can occur when VCC is removed as the host
powers down, and the peripheral still has normal
power applied. The 5V from the peripheral can
therefore be linked to the host’s VBUS, potentially
causing backdrive current into the host and
overloading the peripheral power supply.
GND
EN#
Charge
Pump
VCC
Over
current
protect
© 2003 California Micro Devices Corp. All rights reserved.
11/10/03
430 N. McCarthy Blvd, Milpitas, California 95035
OC#
VOUT
C0970500
Tel: (408) 263-3214
Fax: (408) 263-7846
www.calmicro.com
1
Preliminary
CM3513
CALIFORNIA MICRO DEVICES
Absolute Maximum Ratings
Parameter
Rating
ESD Protection (All pins, HBM)
± 2000
VCC Input Voltage
+ 5.6, Gnd - 0.5
Storage Temperature Range
-55 to +150
Operating Ambient
-40 to +85
Operating Junction
-40 to +150*
Output Current Loading
Internally limited
Package Power Dissipation
0.5
Unit
V
V
°C
A
W
*Internally limited
Operating Conditions (unless specified otherwise)
Parameter
Range
VCC Input Voltage
4.5 to 5.5
Ambient Temperature
-40 to +85
ILOAD
VCC
0 to 2400
Symbol
UVLO
RSW
RSWa
RSWb
VOUT
ILIM
tFBD
TMAX
TMIN
IRCC
ICC
ICCQ
VIH-EN
VIL-EN
IOHZ-OC
VOL-OC
Unit
V
°C
mA
Electrical Operating Characteristics (over operating conditions unless specified otherwise)
Parameter
Conditions
MIN
TYP
MAX
VCC voltage under which circuit
2.2
2.5
locks out - will not operate
Switch ON-Resistance
ILOAD = 0 to 2400mA; VCC = 5V,
0.07
0.1
T = 25°C
Switch ON-Resistance
ILOAD = 0 to 2400mA; VCC = 5V,
0.125
T = 0 to +85°C
Switch ON-Resistance
ILOAD = 0 to 2400mA; VCC = 5V,
0.125
T = -40 to +85°C
Output Voltage
ILOAD = 1000mA, VCC = 5.0V,
4.9
EN#=0V, T=25°C
Over-current limit
2400 3000 3800
VCC = 5V T=25°C
10
20
30
Time delay from overcurrent
detection to OC# output
indication (fault blanking delay)
Temperature at which switch
150
turns off during overcurrent
Temperature at which switch
125
turns on, after cooling from TMAX
1
Reverse leakage from output to VCC = 0V, VOUT = 5V, EN# = high,
input
T=25°C
Operating supply current
EN# = low
95
Quiescent current
1
EN# = high T=25°C
EN# input Logic-1 threshold
VCC = 5V
2
EN# input Logic-0 threshold
VCC = 5V
0.8
OC# output OFF state leakage
VCC = 5V, VOUT = 5V
1.0
OC# output Logic-0 threshold
IOC = 1mA
0.4
UNIT
V
Ω
Ω
Ω
V
mA
ms
°C
°C
µA
µA
µA
V
V
uA
V
Note: This is a preliminary datasheet only. Data subject to change at any time.
© 2003 California Micro Devices Corp. All rights reserved
11/10/03
430 N. McCarthy Blvd, Milpitas, California 95035
Tel: (408) 263-3214
Fax: (408) 263-7846
www.calmicro.com
2
Preliminary
CM3513
CALIFORNIA MICRO DEVICES
Pin Functions
VCC is the power source.
Pins 2 & 3 must be connected together externally
EN# is the active low logic input pin that is used to
control the power switch. Set EN# high (>2V) to
deselect VOUT, and set EN# low (<0.8V) to select
VOUT.
VOUT provides the power for the loads. The internal
MOSFET switch is designed for very low voltage drops
from the voltage input pins at the full rated current.
Pins 6, 7 & 8 must be connected together externally.
OC# is an active low open-drain output voltage,
Current loads of up to 2.4A are allowed. Current loads
above 2.4A may cause the constant-current limiting
circuit to operate – reducing the output voltage.
indicating an overcurrent fault condition has been
detected at VOUT. There is a built-in 10msec (min.)
fault blanking delay after the overcurrent fault
condition has been detected, before this output
becomes active low. The OC# output deasserts only
when both the overcurrent condition stops and when
the voltage drop across the switch is less than 1V. An
external pull-up resistor of 10k - 100k is required if
the OC# output is used.
Continuous over-current loads will cause the part’s
internal temperature to rise. If the internal temperature
exceeds 150’C then the switch immediately turns off.
Once the part has cooled to 125’C then the switch
automatically turns on again.
During the cold-start interval when the input is initially
applied, internal circuitry provides a soft turn-on for the
switch, which limits peak in-rush current.
Pin No.
1
2
3
4
5
6
Symbol
GND
VCC
VCC
EN#
OC#
VOUT
7
8
VOUT
VOUT
GND is the negative reference for all voltages.
Pin Descriptions
Description
Negative reference for all voltages.
Power Primary High current Positive supply input.
Power supply input connected to pin 2
Active low enable pin
Active low when VOUT is in overcurrent mode. External pull-up resistor required.
Output connected to pins 7 and 8
Output connected to pins 6 and 8
Output connected to pins 6 and 7
STANDARD PART ORDERING INFORMATION
1
Pins
Package
Ordering Part Number
Part Marking
8
SOIC
CM3513-04SN
CM3513-04SN
Note 1: Parts are shipped in Tape & Reel form unless otherwise specified.
Note: This is a preliminary datasheet only. Data subject to change at any time.
© 2003 California Micro Devices Corp. All rights reserved
11/10/03
430 N. McCarthy Blvd, Milpitas, California 95035
Tel: (408) 263-3214
Fax: (408) 263-7846
www.calmicro.com
3
Preliminary
CM3513
CALIFORNIA MICRO DEVICES
Response to Momentary Overcurrent Fault
>2400mA
<2300mA
IOUT
VOUT drops to reduce IOUT
VOUT
OC# goes active
after 10ms (min)
20ms (typ.) delay
OC#
OC# goes inactive as
soon as overcurrent
condition stops
<150’C
Die
Temp.
Response to Continuous Overcurrent Fault
>2400mA
IOUT
Re-powers when
temperature drops
to 125’C
VOUT drops to reduce IOUT
Total powerdown when
over-temperature limit
reached
VOUT
OC#
OC# goes active
after 10ms (min)
20ms (typ.) delay
OC# stays low
150’C
TMAX = 150’C
Die
Temp.
TMIN = 125’C
Note: This is a preliminary datasheet only. Data subject to change at any time.
© 2003 California Micro Devices Corp. All rights reserved
11/10/03
430 N. McCarthy Blvd, Milpitas, California 95035
Tel: (408) 263-3214
Fax: (408) 263-7846
www.calmicro.com
4
Preliminary
CM3513
CALIFORNIA MICRO DEVICES
Typical Operating characteristics
Resistance
[milliohms]
90
CM3513 On-resistance
85
80
75
Vcc=5.5V
70
Vcc=5.0V
65
Vcc=4.5V
Vcc=4.0V
60
55
50
-40
-20
0
20
40
60
80
100
120
Temperature ['C]
CM3513 V OUT - IOUT characteristic
6
5
4
V OUT
[V] 3
2
1
0
0
1
2
3
4
5
6
IOUT [A]
Note: This is a preliminary datasheet only. Data subject to change at any time.
© 2003 California Micro Devices Corp. All rights reserved
11/10/03
430 N. McCarthy Blvd, Milpitas, California 95035
Tel: (408) 263-3214
Fax: (408) 263-7846
www.calmicro.com
5
Preliminary
CM3513
CALIFORNIA MICRO DEVICES
CM3513 Quiescent supply current vs.
l
lt
120
100
I
CC
80
[uA]
60
40
20
0
4
4.2
4.4
4.6
4.8
5
5.2
5.4
5.6
V CC [V]
CM3513 Supply current [EN#=0V]
160
140
120
100
Current
[uA]
80
Vcc=5.0V
Vcc=4.0V
60
40
20
0
-40
-20
0
20
40
60
80
100
120
Temperature ['C]
CM3513 Supply current [EN#=logic'1']
2.5
2
1.5
Current
[uA]
Vcc=5.0
V
Vcc=4.0
V
1
0.5
0
-40
-20
0
20
40
60
80
100
120
140
Temperature
['C]
Note: This is a preliminary datasheet only. Data subject to change at any time.
© 2003 California Micro Devices Corp. All rights reserved
11/10/03
430 N. McCarthy Blvd, Milpitas, California 95035
Tel: (408) 263-3214
Fax: (408) 263-7846
www.calmicro.com
6
Preliminary
CM3513
CALIFORNIA MICRO DEVICES
OC# Fault Blanking Period
40
35
Delay [msec]
30
25
20
15
10
5
0
3.5
3.7
3.9
4.1
4.3
4.5
4.7
4.9
5.1
5.3
5.5
V CC [V]
Fault Blanking Period
25
Time [milliseconds]
20
15
Vcc=5.0V
Vcc=4.0V
10
5
0
-40
-20
0
20
40
60
80
100
120
140
T emperature ['C]
Undervoltage Lock-Out (UVLO)
2.2
2.15
Supply voltage V
CC
or V SBY [V]
2.25
2.1
2.05
2
1.95
-40
-20
0
20
40
60
80
100
120
140
Te m pe rature ['C]
Note: This is a preliminary datasheet only. Data subject to change at any time.
© 2003 California Micro Devices Corp. All rights reserved
11/10/03
430 N. McCarthy Blvd, Milpitas, California 95035
Tel: (408) 263-3214
Fax: (408) 263-7846
www.calmicro.com
7
Preliminary
CM3513
CALIFORNIA MICRO DEVICES
Turn-on time
140
120
Time [usec]
100
80
Vcc=5.5V
Vcc=4.5V
60
40
20
0
-40
-20
0
20
40
60
80
Temperature ['C]
Turn-off time
5.0
4.0
3.0
Vcc=5.5V
Vcc=4.5V
Time [usec]
2.0
1.0
0.0
-40
-20
0
20
40
60
80
Temperature ['C]
Turn-on time v s. VCC
140
120
Time [usec]
100
80
60
40
Cout=0.1u
20
Cout=1u
0
4
4.5
5
5.5
V CC [V]
Note: This is a preliminary datasheet only. Data subject to change at any time.
© 2003 California Micro Devices Corp. All rights reserved
11/10/03
430 N. McCarthy Blvd, Milpitas, California 95035
Tel: (408) 263-3214
Fax: (408) 263-7846
www.calmicro.com
8
Preliminary
CM3513
CALIFORNIA MICRO DEVICES
Turn-off time vs. V C C
30
25
Time [usec]
20
Cout=0.1u
15
Cout=1u
10
5
0
4
4.5
5
5.5
V CC [V ]
Normaliz ed Overcurrent indicator trip point
1.50
1.40
Current [normalized]
1.30
1.20
1.10
Vcc=5.5V
1.00
Vcc=4.5V
0.90
0.80
0.70
0.60
0.50
-40
-20
0
20
40
60
80
100
120
Temperature ['C]
Note: This is a preliminary datasheet only. Data subject to change at any time.
© 2003 California Micro Devices Corp. All rights reserved
11/10/03
430 N. McCarthy Blvd, Milpitas, California 95035
Tel: (408) 263-3214
Fax: (408) 263-7846
www.calmicro.com
9
Preliminary
CM3513
CALIFORNIA MICRO DEVICES
SOIC-8 Package Dimensions
Note: This is a preliminary datasheet only. Data subject to change at any time.
© 2003 California Micro Devices Corp. All rights reserved
11/10/03
430 N. McCarthy Blvd, Milpitas, California 95035
Tel: (408) 263-3214
Fax: (408) 263-7846
www.calmicro.com
10
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