MIC95410
6.6mΩ R
DS(ON)
, 7A, 5.5V V
IN
Load Switch in
1.2mm × 2.0mm QFN Package
General Description
The MIC95410 is a high-side load switch for computing
and ultra-dense embedded computing boards where high-
current low-voltage rails from sub-1V to 5.5V have to be
sectioned. The integrated 6.6mΩ R
DS(ON)
N-channel
MOSFET ensures low voltage drop and low power
dissipation while delivering up to 7A of load current.
The MIC95410 is internally powered by a separated bias
voltage from 2.7V to 9V. It includes a TTL-logic level to
gate a voltage translator driving a charge pump, and an
output discharge function when disabled. The OFF-state
current from bias supply (VS) and the power switch OFF-
state leakage current (I
OFF
) are both below 1µA.
The MIC95410 provides user-adjustable slew-rate-
controlled turn-on to limit the inrush current to the input
supply voltage.
The MIC95410 is available in a thermally efficient, space-
saving 10-pin 1.2mm x 2.0mm QFN package with 0.5mm
pin pitch and an operating junction temperature range from
–40°C to +125°C.
Datasheets and support documentation are available on
Micrel’s web site at:
www.micrel.com.
Features
•
•
•
•
•
•
•
•
•
•
•
Ultra-low R
DS(on)
: 6.6mΩ typical
True 7A current capability
Power rail switching from sub-1V to 5.5V
Bias voltage form 2.7V to 9V
≤1μA OFF-state bias supply current
≤1μA OFF-state power switch leakage current
Adjustable slew rate for inrush current limiting by
external capacitor
Load discharge
TTL-compatible control input
10-pin 1.2mm × 2.0mm QFN package, 0.5mm pin pitch
–40°C to +125°C junction temperature range
Applications
•
Embedded computing boards
•
Servers
•
Data storage equipment
Typical Application
MIC95410 Load Switch
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 •
http://www.micrel.com
October 30, 2014
Revision 1.0
Micrel, Inc.
MIC95410
Ordering Information
Part Number
(1)
Marking
9541
Junction Temperature
Range
–40°C to +125°C
Package
(1)
Lead Finish
Pb-Free
MIC95410YFL
Note:
10-Pin 1.2mm × 2.0mm QFN
1. QFN is a GREEN, RoHS-compliant package. Lead finish is Matte Tin. Mold compound is Halogen Free.
Pin Configuration
10-Pin 1.2mm × 2.0mm QFN (FL)
(Top View)
Pin Description
Pin Number
1
2, 3, E1
4
5
6, 7, 8, E2
9
10
Pin Name
NC
IN
GND
VS
OUT
GC
CTL
Pin Function
Not internally connected. It is recommended to connect pin 1 to IN such that the width of the input
trace can be maximized in the layout.
Power switch input (up to 5.5V).
Driver ground and discharge return.
Bias supply input (2.7V to 9V). Bypass with 4.7µF ceramic capacitor to GND.
Power switch output.
Gate connection of power FET. Add a ceramic capacitor from GC to ground GND for slew rate
control.
Control input. TTL compatible. Logic high enables the power switch. A logic low disables the power
switch and discharges OUT.
October 30, 2014
2
Revision 1.0
Micrel, Inc.
MIC95410
Absolute Maximum Ratings
(2)
IN, OUT to GND .............................................. –0.3V to +6V
IN to OUT ........................................................ –0.3V to +6V
IN to GC ......................................................................... +6V
VS to GND.................................................... –0.6V to +10V
CTL to GND........................................................ 0.6V to V
VS
Lead Temperature (soldering, 10s) ............................ 260°C
Storage Temperature (Ts)......................... –65°C to +150°C
(4)
ESD Rating
Human Body Model .............................................. 1.5kV
Machine Model ...................................................... 150V
Operating Ratings
(3)
Input Voltage (V
IN
) ....................................................... +5.5V
Bias Voltage (V
VS
) ........................................... +2.7V to +9V
Gate Connection Voltage (V
GC
).......................... 0V to +11V
ON-state current (I
IN
) ........................................................ 7A
Junction Temperature (T
J
) ........................ –40°C to +125°C
(5)
Junction Thermal Resistance
10-pin 1.2mm × 2mm QFN (θ
JA
) ........................ 60°C/W
Electrical Characteristics
(6)
V
VS
= V
IN
= V
CTL
= 5V, C
VS
= 4.7µF, C
IN
= 1µF, C
OUT
= 100nF, R
LOAD
= 50Ω unless otherwise specified (see
Typical Application
Schematic).
Typical values at T
A
= 25°C; Bold indicates values/limits over -40°C < T
J
< +125°C.
Symbol
Parameter
Condition
V
VS
= 3.3V, V
CTL
= 0V
V
VS
= 3.3V, V
CTL
= 3.3V, IN = open, OUT = open
V
VS
= 3.3V, V
CTL
= 3.3V, IN = open, OUT =open,
T
A
= T
J
= 25°C
V
VS
= 5V, V
CTL
= 0V
V
VS
= 5V, V
CTL
= 5V, IN = open, OUT = open
V
VS
= 5V, V
CTL
= 5V, IN = open, OUT = open,
T
A
= T
J
= 25°C
V
CTL
I
CTL
C
CTL
Control Input Voltage
Control Input Current
Control Input Capacitance
V
VS
= 2.7V, V
IN
= 1V, I
IN
= I
OUT
= 4A
R
ON
Switch ON-Resistance
V
VS
= 3.3V, V
IN
= 3.3V, I
IN
= I
OUT
= 4A
V
VS
= 5V, V
IN
= 5V, I
IN
= I
OUT
= 4A
I
OFF
I
GC
T
ON
Switch Input Leakage Current
Gate Charge Current
Turn-On Time
(7)
Min.
Typ.
0.1
70
0.1
150
Max.
1
140
90
1
300
200
0.8
V
VS
V
VS
Units
µA
µA
µA
µA
µA
µA
V
V
V
µA
pF
mΩ
mΩ
mΩ
µA
µA
µA
I
S
Supply Current
2.7V ≤ V
VS
≤ 9V, logic-0
2.7V ≤ V
VS
≤ 5V, logic-1
5V < V
VS
≤ 9V, logic-1
2.7V ≤ V
VS
≤ 9V
0
2.0
2.4
0.01
5
6.6
6.6
6.6
0.02
27
630
1.1
0.4
1
9.9
9.9
9.9
1
V
VS
= 5V, V
IN
= 5.5V, V
CTL
= 0V
V
GC
= 4.0V, R
LOAD
= ∞
V
GC
= 0.5V, R
LOAD
= ∞
C
GC
= 10nF, V
IN
= 5V
C
GC
= 100nF, V
IN
= 1V
2.0
1.0
ms
ms
October 30, 2014
3
Revision 1.0
Micrel, Inc.
MIC95410
Electrical Characteristics
(6)
(Continued)
T
OFF
Turn-Off Time
(8)
C
GC
= 10nF, V
IN
= 5V, C
3
= 0µF
C
GC
= 100nF, V
IN
= 1V, C
3
= 0µF
V
OUT
= 5V, R
LOAD
= ∞
V
OUT
= 4V, R
LOAD
= ∞
V
OUT
= 2.5V, R
LOAD
= ∞
V
CTL
= 0V, I
OUT
= -10µA
30
150
2.3
2.0
1.7
0.5
60
300
µs
µs
kΩ
kΩ
kΩ
R
D
Discharge Resistance
V
D
Notes:
Discharge Diode Forward Drop
(V
OUT
-V
CG
)
0.75
V
2. Exceeding the absolute maximum ratings may damage the device.
3. The device is not guaranteed to function outside its operating ratings.
4. Devices are ESD sensitive. Handling precautions are recommended. Human body model, 1.5kΩ in series with 100pF.
5. Junction-to-Ambient Thermal Resistance
θ
JA
is measured using the Evaluation Board as described in section
PCB Layout Recommendations.
6. Specification for packaged product only.
7. The turn-on time is defined as the time it takes from asserting CTL to V
OUT
reaching 90% of V
IN
(rising).
8. The turn-off time is defined as the time it takes from the falling edge of CTL to V
OUT
reaching 90% of V
IN
(falling).
October 30, 2014
4
Revision 1.0
Micrel, Inc.
MIC95410
Typical Characteristics
VS Supply Current vs. VS Supply
Voltage
800
1.40
1.20
Turn-On Time vs. GC Capacitance
V
IN
= 1.05V
7.00
6.00
Turn-On Time vs. GC Capacitance
V
IN
= 3.3V
VS SUPPLY CURRENT (µA)
700
600
500
25°C
TURN-ON TIME (ms)
TURN-ON TIME (ms)
1.00
0.80
V
S
= 3.3V
5.00
4.00
V
S
= 3.3V
400
300
200
100
0
2
3
4
-40°C
0.60
0.40
0.20
0.00
V
S
= 5V
V
S
= 8V
3.00
2.00
1.00
0.00
0
2
4
6
8
10 12 14 16 18 20 22
125°C
V
S
= 5V
V
S
= 8V
5
6
7
8
9
0
2
4
6
8
10 12 14 16 18 20 22
VS SUPPLY VOLTAGE (V)
GC CAPACITANCE (nF)
GC CAPACITANCE (nF)
14.00
12.00
Turn-On Time vs. GC Capacitance
V
IN
= 5V
0.10
0.09
Turn-Off Time vs. GC Capacitance
V
IN
= 1.05V
0.12
Turn-Off Time vs. GC Capacitance
V
IN
= 3.3V
TURN-ON TIME (ms)
0.07
0.06
0.05
0.04
0.03
0.02
0.01
0.00
0
2
4
6
V
S
= 3.3V
TURN-OFF TIME (ms)
10.00
8.00
6.00
4.00
2.00
0.00
0
2
4
6
8
10 12 14 16 18 20 22
V
S
= 5V
V
S
= 3.3V
TURN-OFF TIME (ms)
0.08
0.10
0.08
V
S
= 3.3V
V
S
= 5V
0.06
V
S
= 5V
0.04
0.02
V
S
= 8V
V
S
= 8V
V
S
= 8V
0.00
8
10 12 14 16 18 20 22
0
2
4
6
8
10 12 14 16 18 20 22
GC CAPACITANCE (nF)
GC CAPACITANCE (nF)
GC CAPACITANCE (nF)
0.09
0.08
Turn-Off Time vs. GC Capacitance
V
IN
= 5V
12.0
Initial Peak Inrush Current (input)
vs. GC Capacitance
V
IN
= 1.05V, C
LOAD
= 100µF
35.0
30.0
Initial Peak Inrush Current (input)
vs. GC Capacitance
V
IN
= 3.3V C
LOAD
= 100µF
PEAK INRUSH CURRENT (A)
PEAK INRUSH CURRENT(A)
0.07
10.0
TURN-OFF TIME (ms)
0.06
0.05
0.04
0.03
0.02
0.01
0.00
0
2
4
6
8
10 12 14 16 18 20 22
V
IN
= 3.3V
V
IN
= 5V
V
IN
= 8V
25.0
20.0
15.0
10.0
V
S
= 3.3V
V
S
= 8V
8.0
6.0
V
S
= 8V
4.0
V
S
= 5V
2.0
V
S
= 3.3V
5.0
0.0
V
S
= 5V
0.0
0
2
4
6
8
10 12 14 16 18 20 22
GC CAPACITANCE (nF)
0
2
4
6
8
10 12 14 16 18 20 22
GC CAPACITANCE (nF)
GC CAPACITANCE (nF)
October 30, 2014
5
Revision 1.0
