Document
MIC94064/5
High Side Power Switches
General Description
The MIC94064 and MIC94065 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 over 2A of continuous current.
The MIC94064/5 provides a slew rate controlled SoftStart turn-on of 115µs (typical) to prevent in-rush current from glitching supply rails.
The MIC94065 features an active load discharge circuit which insures capacitive loads retain no charge when the main switch is in an OFF state.
An active pull-down on the enable input keeps MIC94064/5 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.
The MIC94064/5’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 • 2A continuous operating current • 77mΩ (typ) RDSON • Built-in level shift for control logic; can be operated by
1.5V logic. • Low 2µA quiescent current • Soft-Start: 115µs • Micro-power shutdown <1µA • Load discharge circuit: MIC94065 • Space saving 1.2x1.6 mm 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
MIC94064 Load Switch Application
MIC94065 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
January 2008
M9999-011608
Micrel, Inc.
MIC94064/5
Ordering Information
Standard — — — —
Part Number Pb-Free MIC94064YC6(1) MIC94065YC6(1) MIC94064YMT MIC94065YMT
Part Marking(1)
Standard — —
Pb-Free 64P 6P5
—
P64
—
P65
Notes 1. Underbar symbol on SC-70 Pb-free packages may not be to scale.
Soft-Start
● ● ● ●
Load Discharge ● ●
Package SC-70-6 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 MLF
1
1
2,5
2
4
3
Pin Name
VOUT GND VIN
3
4
EN
6
--
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.
January 2008
2
M9999-011608
Micrel, Inc.
MIC94064/5
Absolute Maximum Ratings (1)
Input Voltage (VIN) ................................................+6V Enable Voltage (VEN) ...........................................+6V Continuous Drain Current (ID) (3)
TA = 25°C ....................................................... ±2A TA = 85°C .................................................... ±1.4A Pulsed Drain Current (IDP) (4) ................................ ±6A Continuous Diode Current (IS) (4) .....................–50mA Storage Temperature (Ts) ............... –55°C to +150°C EDS Rating – HBM (6) .......................................... 4KV
Operating Ratings (2)
Input Voltage (VIN)................................. +1.7 to +5.5V Junction Temperature (TA).............. –40°C to +125°C Package Thermal Resistance
SC-70-6 (θJA)......................................... 240°C/W 1.2x1.6 MLF® (θJA) ................................ 172°C/W 1.2x1.6 MLF® (θJC) (3) ........................... 134°C/W
Electrical Characteristics
VIN = 5V; TA = 25°C, bold values indicate –40°C< TA < +85°C, unless noted.
Symbol Parameter
Condition
Min Typ Max Units
VEN_TH
Enable Threshold Voltage VIN = 1.8V to 4.5V, ID = –250µA
0.5
1.2
V
VIN = 1.7V to 4.5V, ID = –250µA
0.4
1.2
V
IEN
Enable Input Current
VIN = VEN = 5.5V
2
4
µA
IVIN
OFF State Leakage Current VIN = +5.5V, VEN = 0V
1
µA
RDS(ON)
P-Channel Drain to Source VIN = +4.5V, ID = –100mA, VEN = 1.5V
ON Resistance
VIN = +3.6V, ID = –100mA, VEN = 1.5V
77 110 mΩ 85 115 mΩ
SC-70 Package
VIN = +2.5V, ID = –100mA, VEN = 1.5V VIN = +1.8V, ID = –100mA, VEN = 1.5V
100 140 mΩ 145 200 mΩ
VIN = +1.7V, ID = –100mA, VEN = 1.5V
155 215 mΩ
RDS(ON)
P-Channel Drain to Source VIN = +4.5V, ID = –100mA, VEN = 1.5V
ON Resistance
VIN = +3.6V, ID = –100.