Document
MIC94040/1/2/3
28mΩ RDSON 3A High Side Load Switch in 1.2mm x 1.2mm MLF® package
General Description
The MIC94040/1/2/3 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 28mΩ RDSON P-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 1.2mm x ® 1.2mm 4 pin MLF package. The MIC94040 and MIC94041 feature rapid turn on, while the MIC94042 and MIC94043 provide a slew rate controlled softstart turn-on of 100µs. The soft-start feature is provided to prevent an in-rush current event from pulling down the input supply voltage. The MIC94041 and MIC94043 feature an active load discharge circuit which switches in a 200Ω load when the switch is disabled to automatically discharge a capacitive load. An active pull-down on the enable input keeps the MIC94040/1/2/3 in a default OFF state until the enable pin is pulled above 1.2V. Internal level shift circuitry allows low voltage logic signals to switch higher supply voltages. The enable voltage can be as high as 5.5V and is not limited by the input voltage. The MIC94040/1/2/3 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 can be found on Micrel’s web site at: www.micrel.com.
Features
∑ ∑ ∑ ∑ ∑ ∑ ∑ ∑ ∑ ∑ ∑ ∑ ∑ ∑ ∑ ∑ ∑ ∑ ∑ 28mΩ RDSON 3A continuous operating current ® 1.2mm x 1.2mm space saving 4-pin MLF package 1.7V to 5.5V input voltage range Internal level shift for CMOS/TTL control logic Ultra low quiescent current Micro-power shutdown current Soft-Start: MIC94042, MIC94043 Load discharge circuit: MIC94041, MIC94043 Ultra fast turn off time Junction operating temperature from -40ºC to +125ºC
Applications
Cellular phones Portable Navigation Devices (PND) Personal Media Players (PMP) Ultra Mobile PCs Portable instrumentation Other Portable applications PDAs Industrial and DataComm equipment
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Typical Application
www.DataSheet4U.com
MIC94040 (ultra fast turn on) MIC94042 (soft-start)
MLF and MicroLeadFrame is a registered trademark of Amkor Technology, 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
MIC94041 (ultra fast turn on with auto-dsicharge) MIC94043 (soft-start with auto-discharge)
May 2008
M9999-053008-A
Micrel, Inc.
MIC94040/1/2/3
Ordering Information
Part Number MIC94040YFL MIC94041YFL MIC94042YFL MIC94043YFL
Notes: 1. MLF Pin 1 Identifier symbol is “”. 2. MLF is a GREEN RoHS-compliant package. Lead finish is NiPdAu. Mold compound is Halogen Free.
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Part Marking — P4 — P1 — P2 — P3
(1)
Fast Turn On
Soft-Start
Load Discharge
Package
(2)
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4-Pin (1.2mm x 1.2mm) MLF 4-Pin (1.2mm x 1.2mm) MLF 4-Pin (1.2mm x 1.2mm) MLF 4-Pin (1.2mm x 1.2mm) MLF
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Pin Configuration
Top View 4-Pin (1.2mm x1.2mm) MLF
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Pin Description
Pin Number 1 2 3 4 Pin Name VOUT GND VIN EN Pin Function Drain of P-channel MOSFET. Ground should be connected to electrical ground. Source of P-channel MOSFET. Enable (Input): Active-high CMOS/TTL control input for switch. Internal ~2MW Pull down resistor. Output will be off if this pin is left floating.
www.DataSheet4U.com
May 2008
2
M9999-053008-A
Micrel, Inc.
MIC94040/1/2/3
Absolute Maximum Ratings(1)
Input Voltage (VIN) ...........................................................+6V Enable Voltage (VEN) ......................................................+6V (3) Continuous Drain Current (ID) TA = 25°C ................................................................. ±3A TA = 85°C .................................................................±2A (4) Pulsed Drain Current (IDP) .........................................±6.0A (5) Continuous Diode Current (IS) ................................–50mA Storage Temperature (Ts) ......................... –55°C to +150°C (6) ESD Rating – HBM ....................................................... 3kV
Operating Ratings(2)
Input Voltage (VIN) ..........................................+1.7 to +5.5V Junction Temperature (TJ) .......................–40°C to +125°C Package Thermal Resistance ® MLF (qJC) ........................................................ 90°C/W
Electrical Characteristics
TA = 25°C, bold values indicate –40°C< TA < +85°C, unless noted.
Symbol VEN_TH IQ Parameter Enable Threshold Voltage Quiescent Current Condition VIN = 1.7V to 4.5V, ID = –250µA VIN = VEN = 5.5V, ID = OPEN Measured on VIN MIC94040, MIC94041 VIN = VEN = 5.5V, ID = OPEN Measured on VIN MIC94042, MIC94043 IEN ISHUT-Q ISHUT-SWITCH RDS(ON) Enable Input .