MIC2077 Datasheet PDF - Micrel Semiconductor

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MIC2077
Micrel Semiconductor

Part Number MIC2077
Description Quad USB Power Distribution Switch
Page 17 Pages


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MIC2027/2077
Quad USB Power Distribution Switch
General Description
The MIC2027 and MIC2077 are quad high-side MOSFET
switches optimized for general-purpose power distribution
requiring circuit protection. The MIC2027/77 are internally
current limited and have thermal shutdown that protects
the device and load.
The MIC2077 offers “smart” thermal shutdown that
reduces current consumption in fault modes. When a
thermal shutdown fault occurs, the output is latched off
until the faulty load is removed. Removing the load or
toggling the enable input will reset the device output.
Both devices employ soft-start circuitry that minimizes
inrush current in applications where highly capacitive loads
are employed.
A fault status output flag is asserted during overcurrent
and thermal shutdown conditions. Transient current limit
faults are internally filtered.
The MIC2027/77 are available in 16-pin narrow (150 mil)
and wide (300 mil) SOIC packages.
Data sheets and support documentation can be found on
Micrel’s web site at www.micrel.com.
Features
150mmaximum on-resistance per channel
2.7V to 5.5V operating range
500mA minimum continuous current per channel
Short-circuit protection with thermal shutdown
Thermally isolated channels
Fault status flag with 3ms filter eliminates false
assertions
Undervoltage lockout
Reverse current flow blocking (no “body diode”)
Circuit breaker mode (MIC2077) reduces power
consumption
Logic-compatible inputs
Soft-start circuit
Low quiescent current
Pin compatible with MIC2524 and MIC2527
Applications
USB peripherals
General purpose power switching
ACPI power distribution
Notebook PCs
PDAs
PC card hot swap
Typical Application
®
UL Recognized Component
4-Port Self-Powered Hub
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
September 2006
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Micrel, Inc.
Ordering Information(1)
Part Number
Standard
Pb-Free
MIC2027-1BWM MIC2027-1YWM
MIC2027-1BM
MIC2027-1YM
MIC2027-2BWM MIC2027-2YWM
MIC2027-2BM
MIC2027-2YM
MIC2077-1BWM MIC2077-1YWM
MIC2077-1BM
MIC2077-1YM
MIC2077-2BWM MIC2077-2YWM
MIC2077-2BM
MIC2077-2YM
Enable
Active High
Active High
Active Low
Active Low
Active High
Active High
Active Low
Active Low
Temperature Range
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
Package
16-Pin Wide SOIC
16-Pin SOIC
16-Pin Wide SOIC
16-Pin SOIC
16-Pin Wide SOIC
16-Pin SOIC
16-Pin Wide SOIC
16-Pin SOIC
MIC2027/2077
Pin Configuration
16-Pin SOIC (M)
16-Pin Wide SOIC (WM)
Functional Pinout
September 2006
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Micrel, Inc.
MIC2027/2077
Pin Description
Pin Number
1
2
3
4, 12
5
6
7
8
9
10
11
13
14
15
16
Pin Name
FLG
ENA
OUTA
GND
IN(C/D)
OUTC
ENC
FLGC
FLGD
END
OUTD
IN(A/B)
OUTB
ENB
FLGB
Pin Function
Fault Flag A (Output): Active-low, open-drain output. Low indicates overcurrent or thermal
shutdown conditions. Overcurrent conditions must last longer than tD to assert flag.
Switch A Enable (Input): Logic-compatible enable input. Active high (-1) or active low (-2).
Switch A Output
Ground
Input: Channel C and D switch and logic supply input.
Switch C Output
Switch C Enable (Input)
Fault Flag C (Output)
Fault Flag D (Output)
Switch D Enable (Input)
Switch D Output
Supply Input: Channel A and B switch and logic supply input.
Switch B Output
Switch B Enable (Input)
Fault Flag B (Output)
September 2006
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Micrel, Inc.
Absolute Maximum Ratings(1)
Supply Voltage (VIN) ............................................ –0.3V +6V
Fault Flag Voltage (VFLG)................................................+6V
Fault Flag Current (IFLG) ..............................................25mA
Output Voltage (VOUT) ....................................................+6V
Output Current (IOUT) .................................Internally Limited
Enable Input (IEN) .......................................... –0.3V VIN +3V
Lead Temperature (soldering, 5sec.)......................... 260°C
Storage Temperature (TS).........................–65°C to +150°C
EDS Rating(3).................................................................. 1kV
MIC2027/2077
Operating Ratings(2)
Supply voltage (VIN) ..................................... +2.7V to +5.5V
Ambient Temperature (TA) .......................... –40°C to +85°C
Junction Thermal Range(TJ) ..................... Internally Limited
Thermal Resistance
[300 mil] Wide SOIC (θJA)................................120°C/W
[150 mil] SOIC (θJA).........................................112°C/W
DIP (θJA) ..........................................................130°C/W
Electrical Characteristics
VIN = +5V; TA = 25°C, bold values indicate –40°C< TA < +85°C, unless noted.
Symbol
IDD
Parameter
Supply Current
Condition
MIC20x7-1, VENA–D 0.8V
(switch off), OUT = open
MIC20x7-2, VENA–D 2.4V
(switch off), OUT = open
MIC20x7-1, VENA–D 2.4V
(switch on), OUT = open
MIC20x7-2, VENA–D 0.8V
(switch on), OUT = open
VEN Enable Input Threshold
low-to-high transition
high-to-low transition
Enable Input Hysteresis
IEN Enable Input Current
VEN = 0V to 5.5V
Enable Input Capacitance
RDS(on)
Switch Resistance
VIN = 5V, IOUT = 500mA
Output Leakage Current
VIN = 3.3V, IOUT = 500mA
MIC20x7-1, VENx 0.8V;
MIC20x7-2, VENx 2.4V, (output off)
Output Current in
Latched Thermal Shutdown
MIC2077 (per Latch Output)
(during thermal shutdown state)
tON Output Turn-On Delay
RL = 10, CL = 1µF, see “Timing Diagrams”
tR
Output Turn-On Rise Time
RL = 10, CL = 1µF, see “Timing Diagrams”
tOFF Output Turnoff Delay
RL = 10, CL = 1µF, see “Timing Diagrams”
tF Output Turnoff Fall Time RL = 10, CL = 1µF, see “Timing Diagrams”
ILIMIT
Short-Circuit Output Current
VOUT = 0V, enabled into short-circuit
Current-Limit Threshold
ramped load applied to output
Short-Circuit Response Time
VOUT = 0V to IOUT = ILIMIT
(short applied to output)
tD
Overcurrent Flag Response
VIN = 5V, apply VOUT = 0V until FLG low
Delay
VIN = 3.3V, apply VOUT = 0V until FLG low
Min Typ Max Units
1.5 10
µA
1.5 10
µA
200 320
µA
200 320
µA
1.7 2.4
0.8 1.45
250
–1 0.01
1
1
100 150
110 180
10
V
V
mV
µA
pF
m
m
µA
50 µA
1.3 5
1.15 4.9
35 100
32 100
0.5 0.9 1.25
1.0 1.25
20
ms
ms
µs
µs
A
A
µs
1.5 3 7 ms
3 ms
September 2006
4
M9999-091506



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