MIC94161/2/3/4/5
3A High-Side Load Switch
with Reverse Blocking
General Description
The MIC94161/2/3/4/5 is a family of high-side load
switches designed to operate from 1.7V to 5.5V input
voltage. The load switch pass element is an internal
14.5mΩ R
DSON
N-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 1.5mm × 1mm
6-ball WLCSP package.
The MIC9416x provides reverse current protection when
the device is disabled. The device will not allow the flow of
current from the output to the input when the device is
turned OFF. Additionally, the MIC94161 features
overvoltage protection to protect the load when the input
voltage is above 4.55V, as well as a precise enable
threshold which keeps the MIC94161 in the default OFF
state until the EN pin rises above 1.15V.
The MIC94161/2/3/4/5 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.
Datasheets and support documentation are available on
Micrel’s web site at:
www.micrel.com.
Features
•
•
•
•
•
•
•
•
•
•
•
•
1.5mm × 1mm 6-ball WLCSP package
14.5mΩ R
DSON
1.7V to 5.5V input voltage range
3A continuous operating current
Reverse current flow blocking (no “body diode”)
Internal level shift for CMOS/TTL control logic
Ultra-low quiescent current
Micropower shutdown current
Soft-start: MIC94161/4/5 (2.7ms)
Load discharge circuit: MIC94162/4
Ultra-fast turn-off time
Junction operating temperature from
−40°C
to +125°C
Applications
•
•
•
•
•
•
•
Solid state drives (SSD)
Smart phones and tablets
Personal media players (PMP)
Ultra mobile PCs
Portable instrumentation
GPS modules
Datacom equipment
Typical Application
MIC94161 (2.7ms Soft Start with OVP)
MIC94163 (Ultra-Fast Turn On)
MIC94165 (2.7ms Soft Start)
MIC94162 (Ultra-Fast Turn On with Auto Discharge)
MIC94164 (2.7ms Soft Start with Auto Discharge)
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 14, 2014
Revision 1.1
Micrel, Inc.
MIC94161/2/3/4/5
Absolute Maximum Ratings
(1)
Input Voltage (V
IN
) ...........................................
−0.3V
to +6V
Enable Voltage (V
EN
) ......................................
−0.3V
to +6V
(3)
Continuous Drain Current (I
D
) ..................................... ±3A
Storage Temperature (T
s
) ......................... –55°C to +150°C
(4)
ESD Rating .................................................................. 2kV
Operating Ratings
(2)
Input Voltage (V
IN
) ...........................................+1.7 to +5.5V
Junction Temperature (T
J
) ........................ –40°C to +125°C
Package Thermal Resistance
1.5mm × 1mm 6-Ball WLCSP (θ
JA
) ................. 108°C/W
Electrical Characteristics
T
A
= 25°C,
bold
values indicate –40°C ≤ T
J
≤ +125°C , unless noted.
Parameter
General
Operating Input Voltage Range
Enable Threshold Voltage
(MIC94161)
Enable Threshold Voltage
(MIC94162/3/4/5)
Enable Input Current
Quiescent Current (MIC94161)
Quiescent Current (MIC94162/3)
Quiescent Current (MIC94164/5)
Shutdown Current
OFF State Leakage Current
Reverse Leakage Current
(MIC94161,3,5)
V
IN
V
ENTH
V
IN
= 1.7V to 5.5V , I
OUT
= 250μA
Logic Low, OFF; V
IN
= 1.8V to 5.5V;
I
OUT
= 250μA;
−40˚C
≥ T
J
≤ 85˚C
Logic High, ON; V
IN
= 1.7V to 5.5V;
I
OUT
= 250μA;
−40˚C
≥ T
J
≤ 125˚C
V
IN
= V
EN
= 3.6V ; I
OUT
= 0
V
IN
= V
EN
= 3.6V ; I
OUT
= 0
V
IN
= V
EN
= 3.6V ; I
OUT
= 0
V
IN
= V
EN
= 3.6V ; I
OUT
= 0
V
IN
= 5.5V ; V
EN
= 0V ; I
OUT
= Open
V
IN
= 5.5V ; V
EN
= 0V ; I
OUT
= Short
V
IN
= 0V ; V
OUT
= 5.5V ; V
EN
= 0V
V
IN
= 5.5V ; V
EN
= 1.5V ; I
OUT
= 3A
V
IN
= 4.5V ; V
EN
= 1.5V ; I
OUT
= 3A
N-Channel ON-Resistance
R
DS(ON)
V
IN
= 3.6V ; V
EN
= 1.5V ; I
OUT
= 3A
V
IN
= 2.7V ; V
EN
= 1.5V ; I
OUT
= 3A
V
IN
= 1.8V ; V
EN
= 1.5V ; I
OUT
= 3A
V
IN
= 1.7V ; V
EN
= 1.5V ; I
OUT
= 3A
Overvoltage Protection Threshold
(MIC94161)
Active Discharge Resistance
(MIC94162/4)
Notes:
1. Exceeding the absolute maximum ratings may damage the device.
2. The device is not guaranteed to function outside its operating ratings.
3. With thermal contact to PCB (see
Application Information).
4. Devices are ESD sensitive. Handling precautions are recommended. Human body model, 1.5kΩ in series with 100pF.
Symbol
Condition
Min.
Typ.
Max.
Units
1.7
1.15
5.5
1.5
0.375
V
V
V
ENTH
V
1.2
2
40
25
15
0.1
0.1
0.1
14.5
15.5
17.5
21
34
40
4.5
4.75
200
5
400
V
Ω
mΩ
4
80
55
35
1
1
1
µA
µA
µA
µA
µA
µA
µA
I
EN
I
Q
I
Q
I
Q
I
SD
I
LEAK
I
LEAKR
V
OVP
R
AD
V
IN
= V
EN
; I
OUT
= 0; V
IN
rising
V
IN
= 3.6V ; I
TEST
= 1mA ; V
EN
= 0V
March 14, 2014
3
Revision 1.1
微控制器 MCU
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