MIC94060/94061
Micrel
MIC94060/94061
100m
Ω
SC-70-6 Smart Load Switch
Final
General Description
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 capaci-
tive 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 pack-
age and have a junction temperature range of –40°C to
+150°C.
Features
• 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 V
GS
= 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
V
IN
77m
9
V
IN
Level Shift
Slew Rate
Control
and
Load
Discharge
77m
9
EN
Level Shift
and
Slew Rate
Control
LOAD
EN
200
9
MIC94061
LOAD
MIC94060
Load Switch Application
Load Switch Application
with Capacitive Load Discharge
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
MICREL [ MICREL SEMICONDUCTOR ]
