MIC94070/71/72/73
High Side Power Switches
General Description
The MIC94070-73 are high-side load switches designed
for operation between 1.7V to 5.5V. The devices contain
a low on-resistance P-channel MOSFET that supports
1.2A of continuous current. The MIC94071 and
MIC94073 feature an active load discharge circuit which
insures capacitive loads retain no charge when the main
switch is in an OFF state.
MIC94070-71 feature rapid turn on while MIC94072-73
provide a slew rate controlled Soft-Start turn-on of 800µs
(typical) to prevent in-rush current from glitching supply
rails.
An active pull-down on the enable input keeps
MIC94070-73 in a default OFF state until the EN pin is
pulled to a high level. Built-in level shift circuitry allows
low voltage logic signals to switch higher supply
voltages, or vice versa; high level logic signals can
control low level voltages.
MIC94070-73’s operating voltage range makes them
suitable for 1-cell Lithium ion and 2- to 3-cell
NiMH/NiCad/Alkaline powered systems, as well as all 5V
applications. Their low operating current of 2µA and low
shutdown current of <1µA maximize battery life.
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
Features
•
•
•
•
•
•
•
•
•
•
1.7V to 5.5V input voltage range
1.2A continuous operating current
3A pulse current
120mΩ R
DSON
(typical)
Built-in level shift for control logic; can be operated by
1.5V logic.
Low 2µA quiescent current
Soft-Start: MIC94072/73
Micro-power shutdown <1µA
Load discharge circuit: MIC94071, MIC94073
®
Space saving 1.2mm × 1.6mm Thin MLF package
Applications
•
Load switch in portable applications:
-
Cellular phones
-
PDAs
-
MP3 players
-
Digital Cameras
-
Portable instrumentation
•
Battery switch-over circuits
•
Level translator
________________________________________________________________________________________________________
Typical Application
MIC94070, 72
Load Switch Application
MIC94071, 73
Load Switch with Capacitive Load Discharge
MLF and
MicroLeadFrame
are registered trademarks of Amkor Technologies, 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
September 2007
M9999-090507
Micrel, Inc.
MIC94070/71/72/73
Ordering Information
Part Number
Standard
—
—
—
—
—
—
—
—
Notes
1.
Under-bar symbol on SC-70 Pb-free packages may not be to scale.
Part Marking
Standard
—
—
—
—
—
—
—
—
(1)
Pb-Free
MIC94070YC6
MIC94071YC6
MIC94072YC6
MIC94073YC6
MIC94070YMT
MIC94071YMT
MIC94072YMT
MIC94073YMT
Pb-Free
70P
71P
72P
73P
P70
P71
P72
P73
Fast
Turn On
●
●
Soft-
Start
Load
Discharge
Package
SC-70-6
SC-70-6
SC-70-6
SC-70-6
1.2mm x 1.6mm Thin MLF
®
®
®
®
●
●
●
●
●
●
●
●
●
●
1.2mm x 1.6mm Thin MLF
1.2mm x 1.6mm Thin MLF
1.2mm x 1.6mm Thin MLF
Pin Configuration
SC-70-6 (C6)
1.2x1.6 mm Thin MLF (MT)
®
Pin Description
Pin Number
SC-70
1
2,5
4
3
6
MLF
1
2
3
4
--
Pin Name
V
OUT
GND
V
IN
EN
NIC
Pin Function
Drain of P-channel MOSFET.
Ground and the backside pad (MLF only) should both be connected to electrical ground.
Source of P-channel MOSFET.
Enable (Input): Active-high CMOS compatible control input for switch A. Do not leave
floating.
No Internal Connection. A signal or voltage applied to this pin will have no effect on device
operation.
September 2007
2
M9999-090507
Micrel, Inc.
MIC94070/71/72/73
Absolute Maximum Ratings
(1)
Input Voltage (V
IN
)................................................ +6V
Enable Voltage (V
EN
) .......................................... +6V
(3)
Continuous Drain Current (I
D
)
®
T
A
= 25°C (MLF ) ....................................... ±1.2A
T
A
= 25°C (SC-70) ...................................... ±1.2A
(4)
Pulsed Drain Current (I
DP
) ............................. ±3.0A
(4)
Continuous Diode Current (I
S
) ..................... –50mA
Storage Temperature (T
s
) ............... –55°C to +150°C
(6)
ESD Rating – HBM ...........................................4KV
Operating Ratings
(2)
Input Voltage (V
IN
) ................................ +1.7 to +5.5V
Junction Temperature (T
J
)...............–40°C to +125°C
Package Thermal Resistance
SC-70-6 (θ
JA
) ........................................ 240°C/W
®
1.2mm × 1.6mm MLF (θ
JA
).................. 172°C/W
®
(3)
1.2mm × 1.6mm MLF (θ
JC
) .............. 134°C/W
Electrical Characteristics
T
A
= 25°C, bold values indicate –40°C< T
A
< +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
Supply Current
Enable Input Current
Shutdown Current
OFF State Leakage Current
P-Channel Drain to Source
ON Resistance
SC-70 Package
Condition
V
IN
= 1.8V to 4.5V, I
D
= –250µA
V
IN
= 1.7V to 4.5V, I
D
= –250µA
V
IN
= V
EN
= 5.5V, I
D
= OPEN
Measured on the V
IN
pin (7)
V
IN
= V
EN
= 5.5V, I
D
= OPEN
V
IN
= +5.5V, V
EN
= 0V, I
D
= OPEN
Measured on the V
IN
pin (7)
V
IN
= +5.5V, V
EN
= 0V, I
D
= SHORT
Measured on V
OUT
(7)
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
DS(ON)
P-Channel Drain to Source
ON Resistance
MLF Package
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
Turn-Off Resistance
V
IN
= +3.6V, I
TEST
= 1mA, V
EN
= 0V
MIC94071, 73
120
130
145
165
200
210
100
110
125
145
180
190
200
170
185
210
225
260
285
160
165
180
200
240
265
400
mΩ
mΩ
mΩ
mΩ
mΩ
mΩ
mΩ
mΩ
mΩ
mΩ
mΩ
mΩ
Ω
50nA
1
µA
2
25nA
4
1
µA
µA
Min
0.5
0.4
50nA
Typ
Max
1.2
1.2
5
Units
V
V
µA
September 2007
3
M9999-090507
Micrel, Inc.
MIC94070/71/72/73
Electrical Characteristics (Dynamic)
V
IN
= 5V; T
A
= 25°C, bold values indicate –40°C< T
A
< +85°C, unless noted.
Symbol
t
ON_DLY
Parameter
Turn-On Delay Time
Condition
V
IN
= +3.6V, ID = –100mA, V
EN
= 1.5V
MIC94070, 71
V
IN
= +3.6V, ID = –100mA, V
EN
= 1.5V
MIC94072, 73
t
ON_RISE
Turn-On Rise Time
V
IN
= +3.6V, ID = –100mA, V
EN
= 1.5V
MIC94070, 71
V
IN
= +3.6V, ID = –100mA, V
EN
= 1.5V
MIC94072, 73
500
800
1500
µs
0.5
1
5
µs
700
1200
µs
Min
Typ
0.85
Max
1.5
Units
µs
t
OFF_DLY
Turn-Off Delay Time
V
IN
= +3.6V, ID = –100mA, V
EN
= 1.5V
MIC94070, 71
V
IN
= +3.6V, ID = –100mA, V
EN
= 1.5V
MIC94072, 73
100
60
60
60
200
200
100
100
ns
ns
ns
ns
t
OFF_FALL
Turn-Off Fall Time
V
IN
= +3.6V, ID = –100mA, V
EN
= 1.5V
MIC94070, 71
V
IN
= +3.6V, ID = –100mA, V
EN
= 1.5V
MIC94072, 73
Notes:
1.
2.
3.
4.
5.
6.
7.
Exceeding the absolute maximum rating may damage the device.
The device is not guaranteed to function outside its operating rating.
With backside thermal contact to PCB.
Pulse width <300µs with < 2% duty cycle.
Continuous body diode current conduction (reverse conduction, i.e. V
OUT
to V
IN
) is not recommended.
Devices are ESD sensitive. Handling precautions recommended. HBM (Human body model), 1.5k in series with 100pF.
Measured on the MIC94070YMT, for other part numbers, please contact Micrel.
September 2007
4
M9999-090507
51单片机
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