MIC2095/MIC2097/MIC2098/MIC2099
Current-Limiting Power Distribution Switches
General Description
The MIC2095/97/98/99 family of switches are self-
contained, current-limiting, high-side power switches, ideal
for power-control applications. These switches are useful
for general purpose power distribution applications such as
digital televisions (DTV), printers, set-top boxes (STB),
PCs, PDAs, and other peripheral devices.
The current limiting switches feature either a fixed
0.5A/0.9A or resistor programmable output current limit.
The family also has fault blanking to eliminate false noise-
induced, over current conditions. After an over-current
condition, these devices automatically restart if the enable
pin remains active. The MIC2097 switch offers a unique
new patented Kickstart feature, which allows momentary
high-current surges up to the secondary current limit
(I
LIMIT_2nd
). This is useful for charging loads with high inrush
currents, such as capacitors.
The MIC2095/97/98/99 family of switches provides under-
voltage, over-temperature shutdown, and output fault
status reporting. The family also provides either an active
low or active high, logic level enable pin.
The MIC2095/97/98/99 family is offered in a space saving
1.6mm x 1.6mm Thin MLF
®
(TMLF) package.
Datasheets and support documentation can be found on
Micrel’s web site at:
www.micrel.com.
Features
•
MIC2095: 0.5A fixed current limit
•
MIC2098: 0.9A fixed current limit
•
MIC2097/99: Resistor programmable current limit
– 0.1A to 1.1A
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
MIC2097: Kickstart for high peak current loads
Under voltage lock-out (UVLO)
Soft start prevents large current inrush
Automatic-on output after fault
Thermal protection
Enable active high or active low
170mΩ typical on-resistance @ 5V
2.5V – 5.5V operating range
Digital televisions (DTV)
Set top boxes
PDAs
Printers
USB / IEEE 1394 power distribution
Desktop and laptop PCs
Game consoles
USB keyboard
Docking stations
Applications
_________________________________________________________________________________________________________________________
Typical Application
MIC2095 USB Power Switch
MLF and
MicroLeadFrame
are registered trademarks of Amkor Technology, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 •
http://www.micrel.com
August 2011
M9999-080211-C
Micrel, Inc.
MIC2095/97/98/99
Ordering Information
Part Number
MIC2095-1YMT
MIC2095-2YMT
MIC2097-1YMT
MIC2097-2YMT
MIC2098-1YMT
MIC2098-2YMT
MIC2099-1YMT
MIC2099-2YMT
Marking
J1K
J2K
K1K
K2K
H1K
H2K
G1K
G2K
ENABLE
Logic
Active High
Active Low
Active High
Active Low
Active High
Active Low
Active High
Active Low
Kickstart ™
No
No
Yes
Yes
No
No
No
No
(
)
ILIMIT
0.5A
0.5A
0.1 A – 1.1A
0.1 A – 1.1A
0.9A
0.9A
0.1 A – 1.1A
0.1 A – 1.1A
FAULT/
Output
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Junction
Temperature
(1)
Range
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
Package
6-Pin 1.6mm x
1.6mm TMLF
6-Pin 1.6mm x
1.6mm TMLF
6-Pin 1.6mm x
1.6mm TMLF
6-Pin 1.6mm x
1.6mm TMLF
6-Pin 1.6mm x
1.6mm TMLF
6-Pin 1.6mm x
1.6mm TMLF
6-Pin 1.6mm x
1.6mm TMLF
6-Pin 1.6mm x
1.6mm TMLF
Pin Configuration
6-Pin 1.6mm x 1.6mm TMLF (MT) (Top View)
MIC2095-1YMT/MIC2098-1YMT
6-Pin 1.6mm x 1.6mm TMLF (MT) (Top View)
MIC2095-2YMT/MIC2098-2YMT
6-Pin 1.6mm x 1.6mm TMLF (MT) (Top View)
MIC2097-1YMT / MIC2099-1YMT
6-Pin 1.6mm x 1.6mm TMLF (MT) (Top View)
MIC2097-2YMT / MIC2099-2YMT
August 2011
2
M9999-080211-C
Micrel, Inc.
MIC2095/97/98/99
Pin Description
Pin Number
1
2
(MIC2095/MIC2098)
2
(MIC2097/MIC2099)
3
4
(MIC2095-1/MIC2097-1/
MIC2098-1/MIC2099-1)
4
(MIC2095-2/MIC2097-2/
MIC2098-2/MIC2099-2)
5
6
EP
Pin Name
VOUT
NC
ILIMIT
FAULT/
Pin Function
Switch output (Output): The load being driven by the switch is connected to this pin.
No Connect; Pin not used.
Current Limit (Input): A resistor from this pin to ground sets the current limit value. See
the “setting I
LMIIT
” section for details on setting the resistor value.
Fault status (Output): A logic low on this pin indicates the switch is in current limiting, or
has been shut down by the thermal protection circuit. This is an open-drain output
allowing logical OR’ing of FAULT/ outputs from multiple devices.
Switch Enable (Input): Logic high on this pin enables the switch.
Switch Enable (Input): Logic low on this pin enables the switch.
Ground.
Power input (Input): This pin provides power to both the output power switch and the
internal control circuitry.
Used to remove heat from die. Connect to ground. Use multiple vias to the ground
plane to minimize thermal impedance. See Applications Section for additional
information.
ENABLE
ENABLE/
GND
VIN
EP
August 2011
3
M9999-080211-C
Micrel, Inc.
MIC2095/97/98/99
Absolute Maximum Ratings
(1)
Supply Voltage (V
IN
) .......................................
−0.3V
to 6.0V
Output Voltage (V
OUT
) .......................................
−0.3V
to V
IN
FAULT Pin Voltage (V
FAULT
) ..............................
−0.3V
to V
IN
ENABLE Pin Voltage (V
ENABLE
)..........................
−0.3V
to V
IN
ILIMIT Pin Voltage (V
ILIMIT
) ................................
−0.3V
to V
IN
Power Dissipation (P
D
) ..............................Internally Limited
Maximum Junction Temperature (T
J
)......................... 150°C
Storage Temperature (Ts).........................−65°C to +150°C
Lead Temperature (soldering, 10sec.)....................... 260°C
ESD HBM Rating (VOUT, GND)
(3)
................................. 4kV
ESD HBM Rating (FAULT, ENABLE, VIN)
(3)
................. 2kV
Operating Ratings
(2)
Supply Voltage (V
IN
)......................................... 2.5V to 5.5V
ENABLE Pin Voltage (V
ENABLE
) .............................. 0V to V
IN
FAULT Pin Voltage (V
FAULT
) ................................... 0V to V
IN
Ambient Temperature Range (T
A
) .............. –40°C to +85°C
Package Thermal Resistance
(6)
1.6mm × 1.6mm TMLF (θ
JA
) .............................. 93ºC/W
Electrical Characteristics
(4)
V
IN
= 5V; C
IN
= 1µF T
A
= 25°C unless noted,
bold
values indicate –40°C≤ T
A
≤
+85°C.
Symbol
Power Input Supply
V
IN
Input Voltage Range
Quiescent Supply Current
I
IN
Shutdown Current
(5)
Parameter
Condition
Min.
Typ.
Max.
Units
2.5
Switch = ON
Active Low Enable, V
EN
= 0V
Active High Enable, V
EN
= 1.5V
Switch = OFF
Active Low Enable, V
EN
= 1.5V
Switch = OFF
Active High Enable, V
EN
= 0.5V
V
IN
Rising
2
1.9
80
5.5
300
V
µA
8
0.1
2.25
2.15
100
15
5
2.5
2.4
µA
µA
V
V
mV
UVLO
THRESHOLD
V
IN
UVLO Threshold
V
IN
Falling
V
IN
UVLO Hysteresis
Enable Control
V
EN
I
EN
t
ON_DLY
t
OFF_DLY
t
RISE
ENABLE Logic Level Low
(5)
ENABLE Logic Level High
ENABLE Bias Current
Output Turn-on Delay
Output Turn-off Delay
Output Turn-on rise time
(5)
V
IL(MAX)
V
IH(MIN)
0V
≤
V
EN
≤
5V
R
L
= 43Ω, C
L
= 120µF
V
EN
= 50% to V
OUT
= 10%
R
L
= 43Ω, C
L
= 120µF
V
EN
= 50% to V
OUT
= 90%
R
L
= 100Ω, C
LOAD
= 1µF
V
OUT
= 10% to 90%
500
1000
1.5
0.1
1000
0.5
V
V
5
1500
700
1500
µA
µs
µs
µs
Thermal Protection
OT
Threshold
Over-temperature Shutdown
T
J
Rising
T
J
Falling
145
135
°C
°C
August 2011
4
M9999-080211-C
Micrel, Inc.
MIC2095/97/98/99
Electrical Characteristics (Continued)
V
IN
= 5V; C
IN
= 1µF T
A
= 25°C unless noted,
bold
values indicate –40°C≤ T
A
≤
+85°C.
Symbol
Internal Switch
R
DS(ON)
On Resistance
V
IN
= 5V, I
OUT
= 100mA
Switch = OFF, V
OUT
= 0V
Active Low Enable, V
EN
= 1.5V
Active High Enable, V
EN
= 0V
170
220
275
0.1
10
mΩ
mΩ
µA
Parameter
Condition
Min.
Typ.
Max.
Units
I
LEAK
Output Leakage Current
Output Current Limit (MIC2095)
I
LIMIT
Fixed Current Limit
V
OUT
= 0.8 × V
IN
0.5
0.7
0.9
A
Output Current Limit (MIC2098)
I
LIMIT
Fixed Current Limit
V
OUT
= 0.8 × V
IN
0.9
1.1
1.5
A
Output Current Limit (MIC2097, MIC2099)
I
OUT
= 1.1A, V
OUT
= 0.8 × V
IN
; V
IN
=2.5V
CLF
Variable Current Limit
Factors
I
OUT
= 0.5A, V
OUT
= 0.8 × V
IN
; V
IN
=2.5V
I
OUT
= 0.2A, V
OUT
= 0.8 × V
IN
; V
IN
=2.5V
I
OUT
= 0.1A, V
OUT
= 0.8 × V
IN
; V
IN
=2.5V
Kickstart
TM
Current Limit (MIC2097)
I
LIMIT_2nd
t
D_LIMIT
Fault Flag
V
FAULT/
Fault Flag Output Voltage
Fault Flag Off Current
I
OL
= 10mA
V
FAULT/
=5V
0.25
0.01
0.4
1
V
µA
Secondary Current Limit
Duration of Kickstart
Current Limit
TM
175
152
138
121
215
206
200
192
263
263
263
263
V
V
V
V
V
IN
= 2.5V; V
OUT
= 0V
V
IN
= 2.5V
77
1.5
105
192
A
ms
Fault Delay (MIC2095, MIC2098, MIC2099)
t
D_FAULT
Delay before asserting or
releasing FAULT/
Time from current limiting (V
OUT
= 0.4 x
V
IN
) to FAULT/ state change
20
32
49
ms
Fault Delay (MIC2097)
t
D_FAULT
Delay before asserting or
releasing FAULT/
Time from current limiting (V
OUT
= 0.8 x
V
IN
) to FAULT/ state change; V
IN
= 2.5V
77
105
192
ms
Notes:
1. Exceeding the absolute maximum rating may damage the device.
2. The device is not guaranteed to function outside its operating rating.
3. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF.
4. Specifications for packaged product only.
5. Check the Ordering Information section to determine which parts are Active High or Active Low.
6. Requires proper thermal mounting to achieve this performance.
August 2011
5
M9999-080211-C
嵌入式系统
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