MIC94044/5
28mΩ R
DSON
3A High Side Load Switch
in 1.2mm x 1.2mm MLF
®
Package
General Description
The MIC94044 and MIC94045 are high-side load switches
designed to operate from 1.7V to 5.5V input voltage. The
load switch pass element is an internal 28mΩ R
DSON
P-channel MOSFET which enables the device to support
up to 3A of continuous current. Additionally, the load
switch supports 1.5V logic level control and shutdown
features in a tiny 1.2mm x 1.2mm 4 pin MLF
®
package.
The MIC94044/5 provides a slew rate controlled soft-start
turn-on of 1ms (typical) to prevent an in-rush current event
from pulling down the input supply voltage.
The MIC94045 features an active load discharge circuit
which switches in a 200Ω load when the switch is disabled
to automatically discharge a capacitive load.
Internal level shift circuitry allows low voltage logic signals
to switch higher supply voltages. The enable voltage can
be as high as 5.5V and is not limited by the input voltage.
The MIC94044/5 operating voltage range makes them
ideal for Lithium ion and NiMH/NiCad/Alkaline battery
powered systems, as well as non-battery powered
applications. The devices provide low quiescent current
and low shutdown current to maximize battery life.
Data sheets and support documentation can be found on
Micrel’s web site at:
www.micrel.com.
Features
•
•
•
•
•
•
•
•
•
•
•
28mΩ R
DSON
3A continuous operating current
1.2mm x 1.2mm space saving 4-pin MLF
®
package
1.7V to 5.5V input voltage range
Internal level shift for CMOS/TTL control logic
Ultra low quiescent current
Micro-power shutdown current
Soft-Start: 1ms
Load discharge circuit: MIC94045
Ultra fast turn off time
Junction operating temperature from -40ºC to +125ºC
Applications
•
•
•
•
•
•
•
•
•
Solid State Drives (SSD)
Cellular phones
Portable Navigation Devices (PND)
Personal Media Players (PMP)
Ultra Mobile PCs
Portable instrumentation
Other Portable applications
PDAs
Industrial and DataComm equipment
____________________________________________________________________________________________________________
Typical Application
MIC94044 (1ms soft-start)
MIC94045 (1ms soft-start with auto-discharge)
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
March 2011
M9999-032311-A
Micrel, Inc.
MIC94044/5
Ordering Information
Part Number
MIC94044YFL
MIC94045YFL
Notes:
1. MLF Pin 1 Identifier symbol is “ ”.
2. Over bar symbol (¯¯) may not be to scale.
3. MLF is a GREEN RoHS-compliant package. Lead finish is NiPdAu. Mold compound is Halogen Free.
®
®
Marking
P5
P6
Soft-Start
1ms
1ms
Load Discharge
Package
4-Pin 1.2mm x 1.2mm MLF
®
―
4-Pin 1.2mm x 1.2mm MLF
®
Pin Configuration
4-Pin 1.2mm x 1.2mm MLF
®
(Top View)
Pin Description
Pin Number
1
2
3
4
Pin Name
V
OUT
GND
V
IN
EN
Description
Drain of P-channel MOSFET.
Ground should be connected to electrical ground.
Source of P-channel MOSFET.
Enable (Input): Active-high CMOS/TTL control input for switch. Do not leave floating.
March 2011
2
M9999-032311-A
Micrel, Inc.
MIC94044/5
Absolute Maximum Ratings
(1)
Input Voltage (V
IN
) ........................................................ +6V
Enable Voltage (V
EN
) ................................................... +6V
Continuous Drain Current (I
D
)
(3)
T
A
= 25°C .............................................................. ±3A
T
A
= 85°C .............................................................. ±2A
Pulsed Drain Current (I
DP
)
(4)
...................................... ±6.0A
Continuous Diode Current (I
S
)
(5)
.............................. –50mA
Storage Temperature (T
s
) ....................... –55°C to +150°C
ESD Rating – HBM
(6)
...................................................... 3kV
Operating Ratings
(2)
Input Voltage (V
IN
)....................................... +1.7 to +5.5V
Junction Temperature (T
J
) .....................–40°C to +125°C
Package Thermal Resistance
1.2mm x 1.2mm MLF
®
-4L(θ
JC
) .........................90°C/W
Electrical Characteristics
(7)
T
A
= 25°C, bold values indicate –40°C< T
J
< +85°C, unless noted.
Symbol
V
EN_TH
I
Q
I
EN
I
SHUT-Q
I
SHUT-SWITCH
R
DS(ON)
Parameter
Enable Threshold Voltage
Quiescent Current
Enable Input Current
Quiescent Current (shutdown)
OFF State Leakage Current
P-Channel Drain to Source ON
Resistance
Condition
V
IN
= 1.7V to 4.5V, I
D
= –250µA
V
IN
= V
EN
= 5.5V, I
D
= OPEN
Measured on V
IN
V
IN
= V
EN
= 5.5V, I
D
= OPEN
V
IN
= +5.5V, V
EN
= 0V, I
D
= OPEN
Measured on V
IN
V
IN
= +5.5V, V
EN
= 0V, I
D
= SHORT
(7)
Measured on V
OUT
,
V
IN
= +5.0V, I
D
= –100mA, V
EN
= 1.5V
V
IN
= +4.5V, I
D
= –100mA, V
EN
= 1.5V
V
IN
= +3.6V, I
D
= –100mA, V
EN
= 1.5V
V
IN
= +2.5V, I
D
= –100mA, V
EN
= 1.5V
V
IN
= +1.8V, I
D
= –100mA, V
EN
= 1.5V
V
IN
= +1.7V, I
D
= –100mA, V
EN
= 1.5V
R
SHUTDOWN
Dynamic
t
ON_DLY
t
ON_RISE
t
OFF_DLY
t
OFF_FALL
Turn-On Delay Time
Turn-On Rise Time
Turn-Off Delay Time
Turn-Off Fall Time
V
IN
= +3.6V, I
D
= –100mA, V
EN
= 1.5V
V
IN
= +3.6V, I
D
= –100mA, V
EN
= 1.5V
V
IN
= +3.6V, I
D
= –100mA, V
EN
= 0V
V
IN
= +3.6V, I
D
= –100mA, V
EN
= 0V
(No Output Capacitor)
Notes:
1. Exceeding the absolute maximum rating may damage the device.
2. The device is not guaranteed to function outside its operating rating.
3. With thermal contact to PCB. See power dissipation considerations section.
4. Pulse width <300µs with < 2% duty cycle.
5. Continuous body diode current conduction (reverse conduction, i.e. V
OUT
to V
IN
) is not recommended.
6. Devices are ESD sensitive. Handling precautions recommended. HBM (Human body model), 1.5kΩ in series with 100pF.
7. Measured on the MIC94044YFL.
Min
0.4
Typ
Max
1.2
Units
V
µA
µA
µA
µA
mΩ
mΩ
mΩ
mΩ
mΩ
mΩ
Ω
2.25
0.1
0.1
0.1
28
30
33
45
72
82
200
10
1
1
1
55
60
65
90
145
160
400
Turn-Off Resistance
V
IN
= +3.6V, I
TEST
= 1mA, V
EN
= 0V
MIC94045
0.2
0.4
0.85
1
100
20
1.5
1.5
200
100
ms
ms
ns
ns
March 2011
3
M9999-032311-A
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