MICREL MIC94060

MIC94060/94061
Micrel
MIC94060/94061
100mΩSC-70-6 Smart Load Switch
Final
General Description
Features
The MIC94060 and MIC94061 are smart high-side load
switches housed in the SC-70-6 package. The devices
contain a low on-resistance, 100mΩ(max) p-channel MOSFET
that is driven by built-in level-shift and slew-rate control
circuitry. The low on-resistance of the devices allows for them
to support over 2A of continuous current. The MIC94061
features an active pull-down circuit that discharges capacitive loads through a 200Ω switch when the IC is set to the OFF
state.
Pull down circuitry keeps the MIC94060/1 in a default OFF
state until the EN pin is pulled to a high level. The built-in level
shift circuitry allows for a logic signal that may be different
from the supply voltage to switch the high-side P-channel
MOSFET on or off. The 1µs turn-on slew rate control
prevents in-rush current from causing glitches on the supply
rail.
Battery life is saved in portable applications with the IC’s low
quiescent current of 2µA and low shutdown current of <1µA.
Their 1.8V to 5.5V operating voltage range makes the
MIC94060/1 suitable for 1-cell Li Ion, 2- to 3-cell NiMH / NiCad
/ Alkaline, as well as other sub-5V input applications.
Integrating the level-shift and slew-rate control circuitry saves
valuable board space and reduces component placement
cost compared to discrete solutions.
The MIC94060/1 are housed in the Teeny™ SC-70-6 package and have a junction temperature range of –40°C to
+150°C.
• 1.8V to 5.5V input voltage range
• Built-in level shift circuitry:
Can be driven by 1.5V logic
• Low on-resistance p-channel MOSFET:
77mΩ at VGS = 4.5V (typ)
2A continuous current
• Built-in slew-rate control:
Controlled 1µs turn-on rise-time
Fast 60ns turn-off fall time
• Low 2µA quiescent current
• <1µA micropower shutdown
• Built-in fast-off load discharge circuit (MIC94061)
• Teeny™ SC-70-6 package
• –40°C to +150°C junction temperature range
Applications
• Load switch in portable applications:
Cellular phones
PDAs
MP3 players
Digital cameras
Notebook PCs
Barcode scanners
• Battery switch over circuits
• Level translators
Typical Application
77mW
VIN
EN
Level Shift
and
Slew Rate
Control
77mW
VIN
LOAD
EN
Level Shift
Slew Rate
Control
and
Load
Discharge
LOAD
200W
MIC94061
MIC94060
Load Switch Application
with Capacitive Load Discharge
Load Switch Application
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
July 2002
1
MIC94060/94061
MIC94060/94061
Micrel
Ordering Information
Part Number
Load Discharge Circuitry
Marking
Junction Temp. Range
Package
MIC94060BC6
NO
P54
–40°C to +150°C
SC-70-6
MIC94061BC6
YES
P55
–40°C to +150°C
SC-70-6
Pin Configuration
3
2
1
4
5
6
MIC94060/1
SC-70-6 (C6)
Pin Description
Pin Number
Pin Name
1
VOUT
Drain of P-channel MOSFET. No bypass capacitor required.
2, 5
GND
Ground connections.
3
EN
Enable input.
4
VIN
Source of P-channel MOSFET. No bypass capacitor required.
6
NC
No connect
MIC94060/94061
Pin Function
2
July 2002
MIC94060/94061
Micrel
Absolute Maximum Ratings (Note 1)
Operating Ratings (Note 2)
Input Voltage (VIN) ........................................................ +6V
Enable Voltage (VEN) .................................................... +6V
Continuous Drain Current (ID) Note 3
TA = 25°C .................................................................. ±2A
TA = 85°C ............................................................... ±1.4A
Pulsed Drain Current (IDP) Note 5 ................................ ±6A
Continuous Diode Current (IS) Note 7 ..................... –50mA
Power Dissipation Note 3
SC-70-6 lead (TA = 85°C) .................................. 270 mW
Ambient Storage Temperature (TS) ......... –55°C to +150°C
ESD Rating Note 4
Input Voltage Range (VIN) ............................... 1.8V to 5.5V
Junction Temperature Range (TJ) ........... –40°C to +150°C
Package Thermal Impedance Note 3
θJA SC-70-6 lead ............................................... 240°C/W
Electrical Characteristics
TA = 25°C, unless otherwise specified.
Symbol
Parameter
Condition
Min
VEN(th)
EN Threshold Voltage
VIN = 1.8V to 4.5V, ID = –250µA
0.5
IEN
EN Input Current (Quiescent Current)
VIN = VEN = 5.5V
IVIN
OFF State Leakage Current
VEN = OPEN or 0V, VIN = +5.5V
RDS(ON)
P-Channel Drain-Source
On-Resistance
VIN = 4.5V, ID = –100 mA; VEN = 1.5V
VIN = 3.6V, ID = –100 mA; VEN = 1.5V
VIN = 2.5V, ID = –100 mA; VEN = 1.5V
VIN = 1.8V, ID = –100 mA; VEN = 1.5V
RSHUTDOWN
Turn-off Impedance (94061)
Typ
Max
Units
1.2
V
4
µA
1
µA
77
85
100
145
100
115
140
200
mΩ
mΩ
mΩ
mΩ
VIN = 3.6V, VEN = 0V or OPEN
200
300
Ω
850
1500
ns
1
5
µs
Static
2
Dynamic (Note 6)
td(on)
Turn-On Delay Time
VIN = 3.6V, ID = –100mA, VEN = 1.5V
tr
Turn-On Rise Time
VIN = 3.6V, ID = –100mA, VEN = 1.5V
td(off)
Turn-Off Delay Time
VIN = 3.6V, ID = –100mA, VEN = 1.5V
100
150
ns
tf
Turn-Off Fall Time
VIN = 3.6V, ID = –100mA, VEN = 1.5V
60
100
ns
0.5
Note 1.
TA = 25°C unless otherwise noted. Absolute maximum ratings indicate limits beyond which damage to the component may occur. Electrical
specifications do not apply when operating the device outside of its operating ratings. The maximum allowable power dissipation is a function
of the maximum junction temperature, TJ(Max), the junction-to-ambient thermal resistance, θJA, and the ambient temperature, TA.
Note 2.
This device is not guaranteed to operate beyond its specified operating rating.
Note 3.
Mounted on 1 square-inch pad of 2 oz. copper.
Note 4.
IC devices are inherently ESD sensitive. Handling precautions required.
Note 5.
Pulse width < 300µs with <2% duty cycle.
Note 6.
Dynamic specifications are guaranteed by design.
Note 7.
Body diode current conduction is not recommended.
July 2002
3
MIC94060/94061
MIC94060/94061
Micrel
Typical Characteristics
EN Threshold Voltage
vs. Input Voltage
1.2
500
VDS = 3.6V
1.3 I = 0.1A
D
1.1
450
400
1.2
1.1
1
0.9
0.9
0.8
0.7
160
120
140
ID = –250µA
0.5
1.5 2 2.5 3 3.5 4 4.5 5 5.5
INPUT VOLTAGE (V)
80
100
0.7
40
60
0.6
0
20
0.8
TEMPERATURE (°C)
Voltage Drop
vs. Load Current
500
10
350
300
250
200
150
100
50
0
VIN = 4.5V
0
0.5
1
1.5
2
2.5
LOAD CURRENT (A)
MIC94060/94061
350
300
250
200
On Resistance
vs. Input Voltage
IL = 1.5A
150
100
50 I = 0.1A
L
0
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5
INPUT VOLTAGE (V)
Turn On Time
vs. Input Voltage
9
8
VIN = 2.5V
RISE TIME (µs)
450 VIN = 1.8V
400
VDROP (mV)
1
RDS-ON (mΩ)
EN THRESHOLD (V)
1.4
-40
-20
RDS-ON (NORMALIZED)
RDS-On Variance with
Temperature
3
7
6
5
4
3
2
1
0
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
INPUT VOLTAGE (V)
4
July 2002
MIC94060/94061
Micrel
Timing Waveforms
Turn-On Response
Enable
(1V/div.)
Turn-Off Response
Load Current
(1mA/div.)
Enable
(1V/div.)
Load Current VOUT
(1mA/div.) (1V/div.)
July 2002
VIN = 3.6V
VOUT
(1V/div.)
VIN = 3.6V
TIME (2µs/div.)
TIME (2µs/div.)
5
MIC94060/94061
MIC94060/94061
Micrel
Package Information
0.65 (0.0256) BSC
1.35 (0.053) 2.40 (0.094)
1.15 (0.045) 1.80 (0.071)
2.20 (0.087)
1.80 (0.071)
DIMENSIONS:
MM (INCH)
1.00 (0.039) 1.10 (0.043)
0.80 (0.032) 0.80 (0.032)
0.18 (0.007)
0.10 (0.004)
0.10 (0.004)
0.00 (0.000)
0.30 (0.012)
0.15 (0.006)
0.30 (0.012)
0.10 (0.004)
SC-70-6 Pin (C6)
MICREL, INC. 1849 FORTUNE DRIVE
TEL
+ 1 (408) 944-0800
FAX
SAN JOSE, CA 95131
+ 1 (408) 944-0970
WEB
USA
http://www.micrel.com
This information is believed to be accurate and reliable, however no responsibility is assumed by Micrel for its use nor for any infringement of patents or
other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent right of Micrel, Inc.
© 2002 Micrel, Incorporated
MIC94060/94061
6
July 2002