MIC2026A/76A
Dual-Channel Power Distribution Switches
Features
General Description
•
•
•
•
The MIC2026A and MIC2076A are high-side MOSFET
switches optimized for general-purpose power
distribution that require circuit protection. The
MIC2026A is particularly well suited for USB
applications.
•
•
•
•
•
•
•
•
•
•
100 mΩ Typical RDS(ON) at 5.0V
140 mΩ Maximum RDS(ON) at 5.0V
2.7V to 5.5V Operating Range
500 mA Minimum Continuous Current per
Channel
Short-Circuit Protection with Thermal Shutdown
Thermally Isolated Channels
Soft-Start Circuit
Fault Status Flag with 3 ms Filter Eliminates False
Assertions
Undervoltage Lockout (UVLO)
Reverse Current Flow Blocking (No “Body Diode”)
Circuit Breaker Mode (MIC2076A)
Pin Compatible with MIC2026 and MIC2076
Logic-Compatible Inputs
Low Quiescent Current
Applications
•
•
•
•
•
•
USB Peripherals
General Purpose Power Switching
ACPI Power Distribution
Notebook PCs
PDAs
PC Card Hot Swap
The MIC2026A/76A are internally current limited and
have thermal shutdown that protects the device and
load.
The MIC2076A offers smart shutdown that reduces
current consumption in fault modes. When the
MIC2076A goes into thermal shutdown due to current
limiting, the output is latched off until the switch is reset.
The MIC2076A can be reset by removing the load,
toggling the enable input or cycling VIN.
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
or thermal shutdown conditions. Transient faults are
internally filtered.
The MIC2026A and MIC2076A are available in an 8-pin
SOIC package.
Package Type
MIC2026A/MIC2076A
8-Lead SOIC (M)
ENA 1
2021 Microchip Technology Inc. and its subsidiaries
8 OUTA
FLGA 2
7 IN
FLGB 3
6 GND
ENB 4
5 OUTB
DS20006608A-page 1
MIC2026A/76A
Typical Application Circuit
VCC
2.7V to 5.5V
VCONT.
10k
10k
Logic Controller
VIN
MIC2026A
ON/OFF
ENA
OVERCURRENT
FLGA
IN
OVERCURRENT
FLGB
GND
ENB
OUTB
ON/OFF
Load
OUTA
1μF
Load
Functional Block Diagram
FLGA
FLAG
RESPONSE
DELAY
OUTA
ENA
CHARGE
PUMP
GATE
CONTROL
CURRENT
LIMIT
OSC.
THERMAL
SHUTDOWN
UVLO
1.2V
REFERENCE
CHARGE
PUMP
GATE
CONTROL
IN
CURRENT
LIMIT
ENB
FLAG
RESPONSE
DELAY
OUTB
FLGB
MIC2026A/2076A
GND
DS20006608A-page 2
2021 Microchip Technology Inc. and its subsidiaries
MIC2026A/76A
1.0
ELECTRICAL CHARACTERISTICS
Absolute Maximum Ratings †
Supply Voltage (VIN) .................................................................................................................................... –0.3V to +6V
Output Voltage (OUTA and OUTB) .............................................................................................................. –0.3V to +6V
Voltage on All Other Pins ............................................................................................................................. –0.3V to +6V
Fault Flag Current (IFLG) .........................................................................................................................................25 mA
Output Current ....................................................................................................................................... Internally Limited
ESD Rating (Note 1, HBM) ........................................................................................................................................ 3 kV
ESD Rating (Note 1, MM) .........................................................................................................................................200V
Operating Ratings ‡
Supply Voltage (VIN) ................................................................................................................................. +2.7V to +5.5V
† Notice: Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device.
This is a stress rating only and functional operation of the device at those or any other conditions above those indicated
in the operational sections of this specification is not intended. Exposure to maximum rating conditions for extended
periods may affect device reliability.
‡ Notice: The device is not guaranteed to function outside its operating ratings.
Note 1: Devices are ESD sensitive. Handling precautions recommended.
ELECTRICAL CHARACTERISTICS
Electrical Characteristics: VIN = 5V; TJ = +25°C, unless noted, bold values valid for –40°C ≤ TJ ≤ +125°C. (Note 1)
Parameter
Supply Current
Symbol
IDD
Enable Input Threshold
VEN
Enable Input Hysteresis
VEN_HYST
Min.
Typ.
Max.
Units
—
0.75
5
MIC20x6A-1, VENA = VENB =
0V, (switch off), OUT = open
—
0.75
20
MIC20x6A-2, VENA = VENB =
5V, (switch off), OUT = open
µA
Conditions
—
100
160
MIC20x6A-1, VENA = VENB =
5V, (switch on), OUT = open
—
100
160
MIC20x6A-2, VENA = VENB =
0V, (switch on), OUT = open
—
1.6
2.4
0.8
1.45
—
V
Low-to-high transition
High-to-low transition
—
150
—
mV
—
Enable Input Current
IEN
–1
0.01
1
µA
VEN = 0V to 5V
Enable Input Capacitance
CEN
—
1
—
pF
—
100
140
—
90
170
—
0.01
10
Switch On Resistance
Output Leakage Current
Short-Circuit Output Current
Current-Limit Threshold
Undervoltage Lockout Threshold
UVLO Hysteresis
Error Flag Output Resistance
RDS(ON)
ILEAK
ILIM
ILIM_TRSH
VUVLO
mΩ
µA
VIN = 3.3V, IOUT = 500 mA
MIC20x6A-1, VENX = 0V;
MIC20x6A-2, VENX = VIN,
(output off)
MIC2076A, Thermal shutdown
state
—
50
—
0.5
0.7
1.25
A
VOUT = 0V, enabled into
short-circuit
A
Ramped load applied to output
—
1.0
1.25
2.2
2.45
2.7
V
2.0
2.25
2.5
VUVHYST
—
200
—
mV
RFLG
—
10
25
Ω
2021 Microchip Technology Inc. and its subsidiaries
—
VIN = 5.0V, IOUT = 500 mA
VIN rising
VIN falling
VIN rising or VIN falling
IL = 10 mA
DS20006608A-page 3
MIC2026A/76A
ELECTRICAL CHARACTERISTICS (CONTINUED)
Electrical Characteristics: VIN = 5V; TJ = +25°C, unless noted, bold values valid for –40°C ≤ TJ ≤ +125°C. (Note 1)
Parameter
Symbol
Min.
Typ.
Max.
Units
Error Flag Off Current
IFLG_OFF
—
—
10
µA
VFLG = VIN
Short-Circuit Response Time
tSC_RESP
—
20
—
µs
VOUT = 0V, short-circuit applied
to enabled switch
tON
—
1.3
5
ms
See Timing Diagrams,
RL = 10Ω, CL = 1 µF
tR
0.5
1.5
4.9
ms
See Timing Diagrams,
RL = 10Ω, CL = 1 µF
tOFF
—
32
100
µs
See Timing Diagrams,
RL = 10Ω, CL = 1 µF
Output Turn-Off Fall Time
tF
—
32
100
µs
See Timing Diagrams,
RL = 10Ω, CL = 1 µF
Overcurrent Flag Response Delay
tD
1.5
3.5
7
ms
From short-circuit to FLG pin
assertion
—
140
—
—
120
—
—
160
—
—
150
—
Output Turn-On Delay
Output Turn-On Rise Time
Output Turn-Off Delay
Overtemperature Threshold (Note
2)
Note 1:
2:
TOVERTEMP
Conditions
TJ increasing, each switch
°C
TJ decreasing, each switch
TJ increasing, both switches
TJ decreasing, both switches
Specification for packaged product only.
If there is a fault on one channel, that channel will shut down when the die reaches approximately 140°C.
If the die reaches approximately 160°C, both channels will shut down even if neither channel is in current
limit.
TEMPERATURE SPECIFICATIONS (Note 1)
Parameters
Sym.
Min.
Typ.
Max.
Units
Conditions
Temperature Ranges
Junction Temperature Range
TJ
Ambient Temperature
TA
Internally Limited
–40
—
+85
°C
—
°C
—
Lead Temperature
—
—
—
+260
°C
Soldering, 10 sec.
Storage Temperature
TS
–65
—
+150
°C
—
θJA
—
160
—
°C/W
—
Package Thermal Resistance
Thermal Resistance, SOIC 8-Ld
Note 1:
The maximum allowable power dissipation is a function of ambient temperature, the maximum allowable
junction temperature and the thermal resistance from junction to air (i.e., TA, TJ, JA). Exceeding the
maximum allowable power dissipation will cause the device operating junction temperature to exceed the
maximum +85°C rating. Sustained junction temperatures above +85°C can impact the device reliability.
VOUT
Device
Under OUT
Test
RL
FIGURE 1-1:
DS20006608A-page 4
CL
Test Circuit.
2021 Microchip Technology Inc. and its subsidiaries
MIC2026A/76A
Timing Diagrams
tR
tF
90%
90%
VOUT
10%
FIGURE 1-2:
10%
Output Rise and Fall Times.
VEN
50%
tOFF
tON
90%
VOUT
10%
FIGURE 1-3:
Active-Low Switch Delay Times (MIC20x6A-2).
VEN
50%
tOFF
tON
90%
VOUT
10%
FIGURE 1-4:
Active-High Switch Delay Time (MIC20x6A-1).
2021 Microchip Technology Inc. and its subsidiaries
DS20006608A-page 5
MIC2026A/76A
2.0
Note:
TYPICAL PERFORMANCE CURVES
The graphs and tables provided following this note are a statistical summary based on a limited number of
samples and are provided for informational purposes only. The performance characteristics listed herein
are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified
operating range (e.g., outside specified power supply range) and therefore outside the warranted range.
180
180
160
160
140
5V
120
IDD_ON (μA)
IDD_ON (μA)
140
100
80
3V
60
85°C
120
100
80
60
40
40
20
20
0
25°C
-40°C
0
-40
-20
0
20
40
60
80
100
2.5
3.0
3.5
FIGURE 2-1:
4.0
4.5
5.0
5.5
VIN (V)
TEMPERATURE (°C)
IDD_ON vs. Temperature.
FIGURE 2-4:
IDD_ON vs. VIN.
200
160
180
140
5V
160
140
RDS_ON (m)
RDS_ON (m)
120
100
3V
80
60
85°C
25°C
120
100
80
60
40
40
20
20
-40°C
0
0
-40
-20
0
20
40
60
80
2.5
100
3.0
3.5
FIGURE 2-2:
RDS_ON vs. Temperature.
4.0
4.5
5.0
5.5
VIN (V)
TEMPERATURE (°C)
FIGURE 2-5:
5
5
4
4
RDS_ON vs. VIN.
RISE TIME (ms)
RISE TIME (ms)
-40°C
3V
3
2
5V
25°C
3
2
85°C
1
1
0
0
-40
-20
0
20
40
60
80
2.5
100
FIGURE 2-3:
Temperature.
DS20006608A-page 6
Output Rise Time vs.
3.0
3.5
4.0
4.5
5.0
5.5
VIN (V)
TEMPERATURE (°C)
FIGURE 2-6:
Output Rise Time vs. VIN.
2021 Microchip Technology Inc. and its subsidiaries
MIC2026A/76A
1000
5V
800
CURRENT LIMIT (mA)
CURRENT LIMIT (mA)
1000
600
3V
400
200
-40°C
800
600
25°C
400
200
0
0
-40
-20
0
20
40
60
80
2.5
100
3.0
3.5
TEMPERATURE (°C)
FIGURE 2-7:
vs. Temperature.
Short-Circuit Current Limit
FIGURE 2-10:
vs. VIN.
800
CURRENT-LIMIT (mA)
CURRENT-LIMIT (mA)
4.5
5.0
5.5
Short-Circuit Current Limit
1000
3V
5V
600
400
200
800
25°C
85°C
600
-40°C
400
200
0
0
-40
-20
0
20
40
60
80
2.5
100
3.0
3.5
FIGURE 2-8:
Temperature.
Current Limit Threshold vs.
FIGURE 2-11:
VIN.
100
80
80
FALL TIME (μs)
100
60
5V
40
4.5
5.0
5.5
Current Limit Threshold vs.
60
85°C
40
20
20
4.0
VIN (V)
TEMPERATURE (°C)
FALL TIME (μs)
4.0
VIN (V)
1000
25°C
-40°C
3V
0
0
-40
-20
0
20
40
60
80
100
2.5
Output Fall Time vs.
2021 Microchip Technology Inc. and its subsidiaries
3.0
3.5
4.0
4.5
5.0
5.5
VIN (V)
TEMPERATURE (°C)
FIGURE 2-9:
Temperature.
85°C
FIGURE 2-12:
Output Fall Time vs. VIN.
DS20006608A-page 7
MIC2026A/76A
5
ENABLE THRESHOLD (V)
ENABLE THRESHOLD (V)
3.0
2.5
2.0
5V
1.5
1.0
3V
0.5
4
3
-40°C
25°C
2
1
85°C
0.0
0
-40
-20
0
20
40
60
80
100
2.5
TEMPERATURE (°C)
FIGURE 2-13:
Temperature.
3.0
3.5
4.0
4.5
5.0
5.5
VIN (V)
Enable Threshold vs.
FIGURE 2-16:
Enable Threshold vs. VIN.
5
5
85°C
3V
4
FLAG DELAY (ms)
FLAG DELAY (ms)
4
3
5V
2
1
3
25°C
-40°C
2
1
0
0
-40
-20
0
20
40
60
80
2.5
100
3.0
3.5
Overcurrent Flag Delay vs.
FIGURE 2-17:
VIN.
10
10.0
8
8.0
IDD_OFF (μA)
IDD_OFF (μA)
FIGURE 2-14:
Temperature.
6
5V
4
2
4.5
5.0
5.5
Overcurrent Flag Delay vs.
6.0
85°C
4.0
25°C
-40°C
2.0
3V
4.0
VIN (V)
TEMPERATURE (°C)
0.0
0
-40
-20
0
20
40
60
80
2.5
100
FIGURE 2-15:
DS20006608A-page 8
IDD_OFF vs. Temperature.
3.0
3.5
4.0
4.5
5.0
5.5
VIN (V)
TEMPERATURE (°C)
FIGURE 2-18:
IDD_OFF vs. VIN.
2021 Microchip Technology Inc. and its subsidiaries
MIC2026A/76A
UVLO THRESHOLD (V)
3.0
2.5
2.0
1.5
1.0
0.5
0.0
-40
-20
0
20
40
60
80
100
TEMPERATURE (°C)
FIGURE 2-19:
Temperature.
UVLO Threshold vs.
FIGURE 2-22:
(MIC2026A-1).
Turn-On/Turn-Off
FIGURE 2-20:
Soft-Start VIN Turn-On.
FIGURE 2-23:
(MIC2026A-1).
Turn-On Zoom
FIGURE 2-21:
VIN Turn-Off.
FIGURE 2-24:
(MIC2026A-1).
Turn-Off Zoom
2021 Microchip Technology Inc. and its subsidiaries
DS20006608A-page 9
MIC2026A/76A
FIGURE 2-25:
(MIC2026A-1).
Enabled into Short
FIGURE 2-28:
Stepped Short.
Current Limit Response,
FIGURE 2-26:
(MIC2026A-1).
Inrush Current Response
FIGURE 2-29:
Zoom.
Current Limit Threshold,
FIGURE 2-27:
Output Short.
Current Limit Response,
FIGURE 2-30:
Shutdown, OUTA.
Independent Thermal
DS20006608A-page 10
2021 Microchip Technology Inc. and its subsidiaries
MIC2026A/76A
FIGURE 2-31:
Independent Thermal
Shutdown, OUTB.
FIGURE 2-34:
Thermal Shutdown
MIC2076A: Output Reset by Removing Load.
FIGURE 2-32:
Current Limit Threshold.
FIGURE 2-35:
Thermal Shutdown
MIC2076A-1: Output Reset by Enable.
FIGURE 2-33:
UVLO.
FIGURE 2-36:
Independent Thermal
Shutdown A MIC2076A-1.
2021 Microchip Technology Inc. and its subsidiaries
DS20006608A-page 11
MIC2026A/76A
FIGURE 2-37:
Independent Thermal
Shutdown B MIC2076A-1.
DS20006608A-page 12
2021 Microchip Technology Inc. and its subsidiaries
MIC2026A/76A
3.0
PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 3-1.
TABLE 3-1:
PIN FUNCTION TABLE
Pin Number
Pin Name
1
ENA
Switch A Enable (Input): Logic-compatible, enable input. Active-high (-1) or active-low
(-2).
2
FLGA
Fault Flag A (Output): Active-low, open-drain output. A logic LOW state Indicates
overcurrent or thermal shutdown conditions. Overcurrent conditions must last longer
than tBDB in order to assert FLGA. The FLGA pin can be left floating; however, fault
reporting information will be lost.
3
FLGB
Fault Flag B (Output): Active-low, open-drain output. A logic LOW state indicates
overcurrent or thermal shutdown conditions. Overcurrent conditions must last longer
than tBDB in order to assert FLGB. The FLGB pin can be left floating; however, fault
reporting information will be lost.
4
ENB
Switch B Enable (Input): Logic-compatible enable input. Active-high (-1) or active-low
(-2).
5
OUTB
Switch B (Output).
6
GND
Ground.
7
IN
8
OUTA
Description
Input: Switch and logic supply input.
Switch A (Output).
2021 Microchip Technology Inc. and its subsidiaries
DS20006608A-page 13
MIC2026A/76A
4.0
FUNCTIONAL DESCRIPTION
4.1
Input and Output
IN is the power supply connection to the logic circuitry
and the drain of the output MOSFET. OUT is the source
of the output MOSFET. In a typical circuit, current flows
from IN to OUT toward the load when the switch is
enabled.
An important consideration in choosing a switch is
whether it has reverse voltage protection. This is
accomplished by eliminating the body diode during the
fabrication process. Reverse voltage protection is
important when the switch is disabled and a voltage is
presented to the OUT pin that is greater than the VIN
pin voltage. The reverse voltage protection prevents
current flow in the reverse path from OUT to IN.
On other hand, when the switch is enabled the switch
is bidirectional. In this case, when a voltage is
presented to the OUT pin that is greater than the VIN
voltage, current will flow from OUT to IN.
4.2
Thermal Shutdown
Thermal shutdown is employed to protect the device
from damage should the die temperature exceed safe
margins due mainly to short-circuit faults. Each channel
employs its own thermal sensor. Thermal shutdown
shuts off the output MOSFET and asserts the FLG
output if the die temperature reaches 140°C and the
overheated channel is in current-limit. The other
channel is not affected. If, however, the die
temperature exceeds 160°C, both channels will be shut
off.
The MIC2026A will automatically reset its output when
the die temperature cools down to 120°C. The
MIC2026A’s output and FLG signal will continue to
cycle on and off until the device is disabled or the fault
is removed. Figure 4-1 depicts typical timing.
Short-Circuit Fault
VEN
Load/Fault
Removed
VOUT
ILIMIT
ILOAD
IOUT
VFLG
Thermal
Shutdown
Reached
3ms typ.
delay
FIGURE 4-1:
MIC2026A Fault Timing.
On the other hand, the MIC2076A’s output will be
turned off, and remain off, until the MIC2076A is reset.
This is often called latched output; that is, the output is
“latched” off and stays off. This is different from the
MIC2026A’s output that will cycle on and off. The
MIC2076A will latch off the output when the MIC2076A
is in current-limiting and the switch goes in to thermal
shutdown. Upon entering thermal shutdown, the output
will be immediately latched off. The MIC2076A (latched
output) can be reset by any of the following three
methods:
1.
2.
3.
Remove the fault load.
Toggle the EN (Enable) pin.
Cycle IN (input power supply).
Resetting the MIC2076A will return it to normal
operation. Depending on PCB layout, package,
ambient temperature, etc., it may take several hundred
milliseconds from the incidence of the fault to the
output MOSFET being shut off. This time will be
shortest in the case of a dead short on the output.
4.3
Power Dissipation
The device’s junction temperature depends on several
factors such as the load, PCB layout, ambient
temperature, and package type. Equations that can be
used to calculate power dissipation of each channel
and junction temperature are found below:
EQUATION 4-1:
P D = R DS ON I OUT
2
Total power dissipation of the device will be the
summation of PD for both channels. To relate this to
junction temperature, the following equation can be
used:
EQUATION 4-2:
T J = P D JA + T A
Where:
TJ = Junction temperature.
TA = Ambient temperature.
θJA = Thermal resistance of the package.
4.4
Current Sensing and Limiting
The current-limit threshold is preset internally. The
preset level prevents damage to the device and
external load, but still allows a minimum current of
500 mA to be delivered to the load.
The current-limit circuit senses a portion of the output
MOSFET switch current. The current-sense resistor
shown in the Functional Block Diagram is virtual and
has no voltage drop. The reaction to an overcurrent
condition varies with three scenarios:
• Switch Enabled into Short-Circuit: If a switch is
enabled into a heavy load or short-circuit, the
DS20006608A-page 14
2021 Microchip Technology Inc. and its subsidiaries
MIC2026A/76A
switch immediately enters into a constant current
mode, reducing the output voltage. The FLG
signal is asserted indicating an overcurrent
condition.
• Short-Circuit Applied to Enabled Output:
When a heavy load or short-circuit is applied to an
enabled switch, a large transient current may flow
until the current-limit circuitry responds. Once this
occurs, the device limits current to the short-circuit
current limit specification.
• Current-Limit Response: The MIC2026A/2076A
current-limit response is often called the foldback
current-limit. The foldback current-limit is the
current limit reached when the output current is
increased slowly rather than abruptly. An
approximation of slowly is tens of milliamps per
second. The foldback current-limit is typical
200 mA higher than the short-circuit current limit.
When the foldback current-limit is reached, the
output current will abruptly decrease to the
short-circuit current limit.
4.5
Fault Flag
The FLG signal is an N-Channel open-drain MOSFET
output. FLG is asserted (active-low) when either an
overcurrent or thermal shutdown condition occurs. In
the case of an overcurrent condition, FLG will be
asserted only after the flag response delay time, tD, has
elapsed. This ensures that FLG is asserted only upon
valid overcurrent conditions and that erroneous error
reporting is eliminated. For example, false overcurrent
conditions can occur during hot plug events when a
highly capacitive load is connected and causes a high
transient inrush current that exceeds the current-limit
threshold for up to 1 ms. The FLG response delay time
tD is typically 3 ms.
4.6
Undervoltage Lockout
Undervoltage lockout (UVLO) prevents the output
MOSFET from turning on until VIN exceeds
approximately 2.45V. Undervoltage detection functions
only when the switch is enabled.
Load and Fault Removed
(Output Reset)
Short-Circuit Fault
VEN
VOUT
ILIMIT
ILOAD
IOUT
VFLG
FIGURE 4-2:
Thermal
Shutdown
Reached
3ms typ.
delay
MIC2076A Fault Timing: Output Reset by Removing Load.
2021 Microchip Technology Inc. and its subsidiaries
DS20006608A-page 15
MIC2026A/76A
5.0
APPLICATION INFORMATION
5.1
Supply Filtering
V+
Logic Controller
A 0.1 μF to 1 μF bypass capacitor positioned close to
the IN and GND pins of the device is strongly
recommended to control supply transients. Without a
bypass capacitor, an output short may cause sufficient
ringing on the input (from supply lead inductance) to
damage internal control circuitry.
FIGURE 5-2:
5.2
5.3
Printed Circuit Board Hot-Plug
The MIC2026A/2076A are ideal inrush current-limiters
for hot-plug applications. Due to their integrated charge
pumps, the MIC2026A/2076A present a high
impedance when off and slowly become a low
impedance as their integrated charge pumps turn on.
This soft-start feature effectively isolates power
supplies from highly capacitive loads by reducing
inrush current. Figure 5-1 shows how the MIC2026A
may be used in a card hot-plug application.
In cases of extremely large capacitive loads (>400 μF),
the length of the transient due to inrush current may
exceed the delay provided by the integrated filter.
Because this inrush current exceeds the current-limit
delay specification, FLG will be asserted during this
time. To prevent the logic controller from responding to
FLG being asserted, an external RC filter, as shown in
Figure 5-2, can be used to filter out transient FLG
assertion. The value of the RC time constant should be
selected to match the length of the transient, less
tD(MIN) of the MIC2026A/2076A.
USB
Controller
MIC2026A
VBUS
4.7
μF
to "Hot"
Receptacle
1
ENA
2
FLGA
IN
3
FLGB
GND
6
OUTB
5
4
ENB
OUTA
USB
Function
8
7
CBULK
USB
Function
CBULK
GND
USB Peripheral
Cable
FIGURE 5-1:
Hot-Plug Application.
OVERCURRENT
1
R
C
IN
D+
1μF
D–
GND
VIN
OUT
GND
1μF
ON/OFF
OVERCURRENT
OVERCURRENT
ON/OFF
OUTA
FLGA
IN
FLGB
GND
ENB
OUTB
8
7
1μF
6
5
Universal Serial Bus (USB) Power
Distribution
The MIC2026A/2076A are ideally suited for USB
(Universal Serial Bus) power distribution applications.
The USB specification defines power distribution for
USB host systems such as PCs and USB hubs. Hubs
can either be self-powered or bus-powered (that is,
powered from the bus). Figure 5-3 shows a typical USB
Host application that may be suited for mobile PC
applications employing USB. The requirement for USB
host systems is that the port must supply a minimum of
500 mA at an output voltage of 5V ±5%. In addition, the
output power delivered must be limited to below 25 VA.
Upon an overcurrent condition, the host must also be
notified. To support hot-plug events, the hub must have
a minimum of 120 μF of bulk capacitance, preferably
low ESR electrolytic or tantalum. Please refer to
Application Note 17 for more details on designing
compliant USB hub and host systems.
For bus-powered hubs, USB requires that each
downstream port be switched on or off under control by
the host. Up to four downstream ports each capable of
supplying 100 mA at 4.4V minimum are allowed. In
addition, to reduce voltage droop on the upstream
VBUS, soft-start is necessary. Although the hub can
consume up to 500 mA from the upstream bus, the hub
must consume only 100 mA max at start-up, until it
enumerates with the host prior to requesting more
power. The same requirements apply for bus-powered
peripherals that have no downstream ports. Figure 5-4
shows a bus-powered hub.
Ferrite
Beads
10k
3.3V USB Controller
3
EN
Transient Filter.
10k
MIC5207-3..3
2
4
VCC
5.0V
4.50V to 5.25V
Upstream VBUS
100mA max.
VBUS
MIC2026A
10k
VBUS
D+
D–
MIC2026A
ENA
FLGA
FLGB
OUTA
IN
GND
ENB
OUTB
120μF
GND
USB
Port 1
1.0μF
VBUS
D+
D–
120μF
USB
Port 2
GND
Data
Data
(Two Pair)
to USB
Controller
FIGURE 5-3:
DS20006608A-page 16
USB Two-Port Host Application.
2021 Microchip Technology Inc. and its subsidiaries
MIC2026A/76A
1.5k 2%
Ferrite
Beads
10k
10k
4.50V to 5.25V
Upstream VBUS
3.3V USB Controller
MIC5207-3.3
VBUS
IN
D+
1μF
D–
GND
VIN
OUT
GND
1μF
ON/OFF
VBUS
OUTA
OVERCURRENT
FLGA
IN
OVERCURRENT
FLGB
GND
ENB
OUTB
ON/OFF
D+
MIC2026A
ENA
D–
120μF
USB
Port 1
GND
1.0μF
VBUS
D+
D–
120μF
USB
Port 2
GND
Data
Data
(Two Pair)
to USB
Controller
FIGURE 5-4:
USB Two-Port Bus-Powered Hub.
2021 Microchip Technology Inc. and its subsidiaries
DS20006608A-page 17
MIC2026A/76A
6.0
PACKAGING INFORMATION
6.1
Package Marking Information
8-Lead SOIC*
XXXXX
-XXX
WNNN
Legend: XX...X
Y
YY
WW
NNN
e3
*
Example
2026A
-2YM
4967
Product code or customer-specific information
Year code (last digit of calendar year)
Year code (last 2 digits of calendar year)
Week code (week of January 1 is week ‘01’)
Alphanumeric traceability code
Pb-free JEDEC® designator for Matte Tin (Sn)
This package is Pb-free. The Pb-free JEDEC designator ( e3 )
can be found on the outer packaging for this package.
●, ▲, ▼ Pin one index is identified by a dot, delta up, or delta down (triangle
mark).
Note:
In the event the full Microchip part number cannot be marked on one line, it will
be carried over to the next line, thus limiting the number of available
characters for customer-specific information. Package may or may not include
the corporate logo.
Underbar (_) and/or Overbar (‾) symbol may not be to scale.
DS20006608A-page 18
2021 Microchip Technology Inc. and its subsidiaries
MIC2026A/76A
8-Lead SOIC Package Outline and Recommended Land Pattern
Note:
For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging.
2021 Microchip Technology Inc. and its subsidiaries
DS20006608A-page 19
MIC2026A/76A
NOTES:
DS20006608A-page 20
2021 Microchip Technology Inc. and its subsidiaries
MIC2026A/76A
APPENDIX A:
REVISION HISTORY
Revision A (November 2021)
• Converted Micrel document MIC2026A/76A to
Microchip data sheet DS20006608A.
• Minor text changes throughout.
2021 Microchip Technology Inc. and its subsidiaries
DS20006608A-page 21
MIC2026A/76A
NOTES:
DS20006608A-page 22
2021 Microchip Technology Inc. and its subsidiaries
MIC2026A/76A
PRODUCT IDENTIFICATION SYSTEM
To order or obtain information, e.g., on pricing or delivery, contact your local Microchip representative or sales office.
PART No.
-X
X
X
-XX
Device
Enable
Junction Temp.
Range
Package
Media Type
Device:
Enable:
MIC2026A:
MIC2076A:
-1
-2
=
=
Dual-Channel Power Distribution Switch
Dual-Channel Power Distribution Switch
with Circuit Breaker Mode
Examples:
a) MIC2026A-1YM:
Dual-Channel Power
Distribution Switch, Active-High
Enable, –40°C to +85°C
Temp. Range, 8-Lead SOIC,
95/Tube
b) MIC2026A-2YM-TR:
Dual-Channel Power
Distribution Switch, Active-Low
Enable, –40°C to +85°C
Temp. Range, 8-Lead SOIC,
2,500/Reel
c) MIC2076A-2YM:
Dual-Channel Power
Distribution Switch with Circuit
Breaker Mode, Active-Low
Enable, –40°C to +85°C
Temp. Range, 8-Lead SOIC,
95/Tube
d) MIC2076A-1YM-TR:
Dual-Channel Power
Distribution Switch with Circuit
Breaker Mode, Active-High
Enable, –40°C to +85°C
Temp. Range, 8-Lead SOIC,
2,500/ Reel
Active-High
Active-Low
Junction
Temperature
Range:
Y
=
–40°C to +85°C
Package:
M
=
8-Lead SOIC
Media Type:
(blank)= 95/Tube
TR
= 2,500/Reel
Note 1:
2021 Microchip Technology Inc. and its subsidiaries
Tape and Reel identifier only appears in the
catalog part number description. This identifier is
used for ordering purposes and is not printed on
the device package. Check with your Microchip
Sales Office for package availability with the
Tape and Reel option.
DS20006608A-page 23
MIC2026A/76A
NOTES:
DS20006608A-page 24
2021 Microchip Technology Inc. and its subsidiaries
Note the following details of the code protection feature on Microchip products:
•
Microchip products meet the specifications contained in their particular Microchip Data Sheet.
•
Microchip believes that its family of products is secure when used in the intended manner, within operating specifications, and
under normal conditions.
•
Microchip values and aggressively protects its intellectual property rights. Attempts to breach the code protection features of
Microchip product is strictly prohibited and may violate the Digital Millennium Copyright Act.
•
Neither Microchip nor any other semiconductor manufacturer can guarantee the security of its code. Code protection does not
mean that we are guaranteeing the product is “unbreakable”. Code protection is constantly evolving. Microchip is committed to
continuously improving the code protection features of our products.
This publication and the information herein may be used only
with Microchip products, including to design, test, and integrate
Microchip products with your application. Use of this information in any other manner violates these terms. Information
regarding device applications is provided only for your convenience and may be superseded by updates. It is your responsibility to ensure that your application meets with your
specifications. Contact your local Microchip sales office for
additional support or, obtain additional support at https://
www.microchip.com/en-us/support/design-help/client-supportservices.
THIS INFORMATION IS PROVIDED BY MICROCHIP "AS IS".
MICROCHIP MAKES NO REPRESENTATIONS OR WARRANTIES OF ANY KIND WHETHER EXPRESS OR IMPLIED,
WRITTEN OR ORAL, STATUTORY OR OTHERWISE,
RELATED TO THE INFORMATION INCLUDING BUT NOT
LIMITED TO ANY IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTABILITY, AND FITNESS FOR A
PARTICULAR PURPOSE, OR WARRANTIES RELATED TO
ITS CONDITION, QUALITY, OR PERFORMANCE.
IN NO EVENT WILL MICROCHIP BE LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE, INCIDENTAL, OR CONSEQUENTIAL LOSS, DAMAGE, COST, OR EXPENSE OF ANY
KIND WHATSOEVER RELATED TO THE INFORMATION OR
ITS USE, HOWEVER CAUSED, EVEN IF MICROCHIP HAS
BEEN ADVISED OF THE POSSIBILITY OR THE DAMAGES
ARE FORESEEABLE. TO THE FULLEST EXTENT
ALLOWED BY LAW, MICROCHIP'S TOTAL LIABILITY ON
ALL CLAIMS IN ANY WAY RELATED TO THE INFORMATION
OR ITS USE WILL NOT EXCEED THE AMOUNT OF FEES, IF
ANY, THAT YOU HAVE PAID DIRECTLY TO MICROCHIP
FOR THE INFORMATION.
Use of Microchip devices in life support and/or safety applications is entirely at the buyer's risk, and the buyer agrees to
defend, indemnify and hold harmless Microchip from any and
all damages, claims, suits, or expenses resulting from such
use. No licenses are conveyed, implicitly or otherwise, under
any Microchip intellectual property rights unless otherwise
stated.
Trademarks
The Microchip name and logo, the Microchip logo, Adaptec,
AnyRate, AVR, AVR logo, AVR Freaks, BesTime, BitCloud,
CryptoMemory, CryptoRF, dsPIC, flexPWR, HELDO, IGLOO,
JukeBlox, KeeLoq, Kleer, LANCheck, LinkMD, maXStylus,
maXTouch, MediaLB, megaAVR, Microsemi, Microsemi logo,
MOST, MOST logo, MPLAB, OptoLyzer, PIC, picoPower,
PICSTART, PIC32 logo, PolarFire, Prochip Designer, QTouch,
SAM-BA, SenGenuity, SpyNIC, SST, SST Logo, SuperFlash,
Symmetricom, SyncServer, Tachyon, TimeSource, tinyAVR, UNI/O,
Vectron, and XMEGA are registered trademarks of Microchip
Technology Incorporated in the U.S.A. and other countries.
AgileSwitch, APT, ClockWorks, The Embedded Control Solutions
Company, EtherSynch, Flashtec, Hyper Speed Control, HyperLight
Load, IntelliMOS, Libero, motorBench, mTouch, Powermite 3,
Precision Edge, ProASIC, ProASIC Plus, ProASIC Plus logo, QuietWire, SmartFusion, SyncWorld, Temux, TimeCesium, TimeHub,
TimePictra, TimeProvider, TrueTime, WinPath, and ZL are
registered trademarks of Microchip Technology Incorporated in the
U.S.A.
Adjacent Key Suppression, AKS, Analog-for-the-Digital Age, Any
Capacitor, AnyIn, AnyOut, Augmented Switching, BlueSky,
BodyCom, CodeGuard, CryptoAuthentication, CryptoAutomotive,
CryptoCompanion, CryptoController, dsPICDEM, dsPICDEM.net,
Dynamic Average Matching, DAM, ECAN, Espresso T1S,
EtherGREEN, GridTime, IdealBridge, In-Circuit Serial
Programming, ICSP, INICnet, Intelligent Paralleling, Inter-Chip
Connectivity, JitterBlocker, Knob-on-Display, maxCrypto, maxView,
memBrain, Mindi, MiWi, MPASM, MPF, MPLAB Certified logo,
MPLIB, MPLINK, MultiTRAK, NetDetach, NVM Express, NVMe,
Omniscient Code Generation, PICDEM, PICDEM.net, PICkit,
PICtail, PowerSmart, PureSilicon, QMatrix, REAL ICE, Ripple
Blocker, RTAX, RTG4, SAM-ICE, Serial Quad I/O, simpleMAP,
SimpliPHY, SmartBuffer, SmartHLS, SMART-I.S., storClad, SQI,
SuperSwitcher, SuperSwitcher II, Switchtec, SynchroPHY, Total
Endurance, TSHARC, USBCheck, VariSense, VectorBlox, VeriPHY,
ViewSpan, WiperLock, XpressConnect, and ZENA are trademarks
of Microchip Technology Incorporated in the U.S.A. and other
countries.
SQTP is a service mark of Microchip Technology Incorporated in
the U.S.A.
The Adaptec logo, Frequency on Demand, Silicon Storage
Technology, Symmcom, and Trusted Time are registered
trademarks of Microchip Technology Inc. in other countries.
GestIC is a registered trademark of Microchip Technology Germany
II GmbH & Co. KG, a subsidiary of Microchip Technology Inc., in
other countries.
All other trademarks mentioned herein are property of their
respective companies.
© 2021, Microchip Technology Incorporated and its subsidiaries.
All Rights Reserved.
For information regarding Microchip’s Quality Management Systems,
please visit www.microchip.com/quality.
2021 Microchip Technology Inc. and its subsidiaries
ISBN: 978-1-5224-9228-3
DS20006608A-page 25
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DS20006608A-page 26
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09/14/21
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