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 RDSON (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
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M9999-090507
Micrel, Inc.
MIC94070/71/72/73
Ordering Information
Part Number
Standard Pb-Free — MIC94070YC6
— — — — — — —
Notes
1. Under-bar symbol on SC-70 Pb-free packages may not be to scale.
Part Marking Standard —
Fast
Pb-Free Turn On
(1)
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
®®®®
MIC94071YC6 MIC94072YC6 MIC94073YC6 MIC94070YMT MIC94071YMT MIC94072YMT MIC94073YMT
70P ● — 71P ● ● — 72P ● — 73P — P70 ● — P71 ● — P72 — P73
● ● ●
● ● ●
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 3 4 6 -- Pin Name VOUT GND VIN 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.
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MIC94070/71/72/73
Absolute Maximum Ratings (1)
Input Voltage (VIN)................................................+6V Enable Voltage (VEN) ..........................................+6V
(3)
Continuous Drain Current (ID)
®
TA = 25°C (MLF).......................................±1.2A TA = 25°C (SC-70)......................................±1.2A
(4)
Pulsed Drain Current (IDP).............................±3.0A
(4)
Continuous Diode Current (IS).....................–50mA Storage Temperature (Ts)...............–55°C to +150°C
(6)
ESD Rating – HBM...........................................4KV
Operating Ratings (2)
Input Voltage (VIN)................................+1.7 to +5.5V Junction Temperature (TJ)...............–40°C to +125°C Package Thermal Resistance SC-70-6 (θJA)........................................240°C/W
®
1.2mm × 1.6mm MLF (θJA)..................172°C/W
® (3)
1.2mm × 1.6mm MLF (θJC)..............134°C/W
Electrical Characteristics
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 IQ Supply Current IEN ISHUT-Q ISHUT-SWITCH RDS(ON)
Enable Input Current Shutdown Current
VIN = VEN = 5.5V, ID = OPEN Measured on the VIN pin (7) VIN = VEN = 5.5V, ID = OPEN VIN = +5.5V, VEN = 0V, ID = OPEN Measured on the VIN pin (7)
OFF State Leakage Current VIN = +5.5V, VEN = 0V, ID = SHORT
Measured on VOUT (7)
P-Channel Drain to Source
ON Resistance
SC-70 Package
VIN = +5.0V, ID = –100mA, VEN = 1.5V VIN = +4.5V, ID = –100mA, VEN = 1.5V VIN = +3.6V, ID = –100mA, VEN = 1.5V VIN = +2.5V, ID = –100mA, VEN = 1.5V VIN = +1.8V, ID = –100mA, VEN = 1.5V VIN = +1.7V, ID = –100mA, VEN = 1.5V
RDS(ON)
P-Channel Drain to Source ON Resistance
MLF Package
VIN = +5.0V, ID = –100mA, VEN = 1.5V VIN = +4.5V, ID = –100mA, VEN = 1.5V VIN = +3.6V, ID = –100mA, VEN = 1.5V VIN = +2.5V, ID = –100mA, VEN = 1.5V VIN = +1.8V, ID = –100mA, VEN = 1.5V VIN = +1.7V, ID = –100mA, VEN = 1.5V
RSHUTDOWN Turn-Off Resistance
VIN = +3.6V, ITEST = 1mA, VEN = 0V MIC94071, 73
120 130 145 165 200 210 100 110 125 145 180 190
170 185 210 225 260 285 160 165 180 200 240 265
mΩ mΩ mΩ mΩ mΩ mΩ mΩ mΩ mΩ mΩ mΩ mΩ
50nA 1 µA
2
4
µA
25nA 1 µA 50nA 5 µA
200 400 Ω
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M9999-090507
Micrel, Inc.
MIC94070/71/72/73
Electrical Characteristics (Dynamic)
VIN = 5V; TA = 25°C, bold values indicate –40°C< TA < +85°C, unless noted. Symbol Parameter tON_DLY
Turn-On Delay Time
Condition
VIN = +3.6V, ID = –100mA, VEN = 1.5V MIC94070, 71
VIN = +3.6V, ID = –100mA, VEN = 1.5V MIC94072, 73
tON_RISE
Turn-On Rise Time
VIN = +3.6V, ID = –100mA, VEN = 1.5V MIC94070, 71
VIN = +3.6V, ID = –100mA, VEN = 1.5V MIC94072, 73
500 800 1500 µs 0.5 1 5 µs 700 1200 µs Min Typ Max Units 0.85 1.5 µs
tOFF_DLY
Turn-Off Delay Time
VIN = +3.6V, ID = –100mA, VEN = 1.5V MIC94070, 71
VIN = +3.6V, ID = –100mA, VEN = 1.5V MIC94072, 73
tOFF_FALL
Turn-Off Fall Time
VIN = +3.6V, ID = –100mA, VEN = 1.5V MIC94070, 71
VIN = +3.6V, ID = –100mA, VEN = 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. VOUT to VIN) 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.
100 200 ns 60 200 ns 60 100 ns 60 100 ns
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M9999-090507
Micrel, Inc.
MIC94070/71/72/73
Typical Characteristics
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M9999-090507
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MIC94070/71/72/73
Functional Characteristics MIC94070
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Micrel, Inc.
MIC94070/71/72/73
MIC94071
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M9999-090507
Micrel, Inc.
MIC94070/71/72/73
MIC94072
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M9999-090507
Micrel, Inc.
MIC94070/71/72/73
MIC94073
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M9999-090507
Micrel, Inc.
MIC94070/71/72/73
Package Information
6-Pin SC-70 (C6)
4-Pin Thin MLF (MT)
®
September 2007
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M9999-090507
分销商库存信息:
MICREL
MIC94070YC6 TRMIC94070YMT TRMIC94072YMT TR
MIC94071YC6 TRMIC94071YMT TRMIC94073YMT TR
MIC94072YC6 TRMIC94073YC6 TR
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