TPS22941,TPS22942,TPS22943,TPS22944,TPS22945
SLVS832C–NOVEMBER2008–REVISED NOVEMBER2009 LOW-INPUT-VOLTAGE CURRENT-LIMITED LOAD SWITCHES
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WITH SHUT OFF AND AUTO-RESTART FEATURE
Check for Samples:TPS22941TPS22942TPS22943TPS22944TPS22945
FEATURES
DESCRIPTION
•Input Voltage Range:1.62V to5.5V
•Low ON resistance The TPS2294x load switches provide protection to
systems and loads in high-current conditions.The –r ON=0.4Ωat V IN=5.5V
devices contain a400-mΩcurrent-limited P-channel –r ON=0.5Ωat V IN=3.3V MOSFET that can operate over an input voltage
–r ON=0.6Ωat V IN=2.5V range of1.62V to5.5V.Current is prevented from
flowing when the MOSFET is off.The switch is –r ON=0.8Ωat V IN=1.8V
controlled by an on/off input(ON),which is capable of •Minimum Current Limit:40mA or100mA interfacing directly with low-voltage control signals.
•Undervoltage Lockout The TPS2294x includes thermal shutdown protection
that prevents damage to the device when a •Thermal Shutdown
continuous over-current condition caus excessive •Shutdown Current<1μA
heating by turning off the switch.
•Fast Current Limit Respon Time
When the switch current reaches the maximum limit,•Fault Blanking the TPS22941/2/3/4/5operates in a constant-current
•Auto Restart mode to prohibit excessive currents from causing
damage.TPS22941/3has a current limit of40mA • 1.8-V Compatible Control Input Thresholds
and TPS22942/4/5has a current limit of100mA.•ESD Performance Tested Per JESD22
For the TPS22941/2/5,if the constant current –4000-V Human-Body Model
condition still persists after10ms,the parts shut off (A114-B,Class II)
the switch and pull the fault signal pin(OC)low.The –1000-V Charged-Device Model(C101)TPS22941/2/5,have an auto-restart feature that turns
•Tiny SC-70(DCK)Package the switch on again after80ms if the ON pin is still
active.A current limit condition on the TPS22943and APPLICATIONS
on the TPS22944immediately pull the fault signal pin
low(OC pin)and the part remains in the •Low-Current Sensor Protection
constant-current mode until the switch current falls •HDMI Connector Protection below the current limit.
•Notebooks
The TPS2294x is available in a SC70-5(DCK)•PDAs
package.It is characterized for operation over the •GPS Devices free-air temperature range of–40°C to85°C.
•MP3Players
•Peripheral Ports
Table1.Feature List
MINIMUM CURRENT LIMIT CURRENT LIMIT
DEVICE AUTO-RESTART TIME(ms)ON PIN ACTIVITY (mA)BLANKING TIME(ms)
TPS22941401080Active LOW TPS229421001080Active LOW TPS22943400N/A Active HIGH TPS229441000N/A Active HIGH TPS229451001080Active HIGH
Plea be aware that an important notice concerning availability,standard warranty,and u in critical applications of Texas
Instruments miconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.Copyright©2008–2009,Texas Instruments Incorporated Products conform to specifications per the terms of the Texas
V IN
ON
V OUT OC
GND
TPS22941,TPS22942,TPS22943,TPS22944,TPS22945
SLVS832C –NOVEMBER 2008–REVISED NOVEMBER 2009
ORDERING INFORMATION (1)
T A
PACKAGE (2)
ORDERABLE PART NUMBER TOP-SIDE MARKING (3)TPS22941DCKR 4A_TPS22942DCKR
4B_–40°C to 85°C
SOT (SC70)–DCK
Tape and reel
TPS22943DCKR 4C_TPS22944DCKR 4D_TPS22945DCKR
4E_
(1)For the most current package and ordering information,e the Package Option Addendum at the end of this document,or e the TI web site at .
(2)Package drawings,thermal data,and symbolization are available at /packaging .
(3)
The actual top-side marking has one additional character that designates the wafer fab/asmbly site.
BLOCK DIAGRAM
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DCK PACKAGE (TOP VIEW)
V OUT 15
GND 2OC
V IN
ON
3
4
最美的歌谣TPS22941,TPS22942,TPS22943,TPS22944,TPS22945
SLVS832C –NOVEMBER 2008–REVISED NOVEMBER 2009
TERMINAL FUNCTIONS
TERMINAL
TYPE DESCRIPTION
SOT (DCK)NAME PIN NO.
1V OUT O Switch output:output of the power switch 2GND –Ground
Over current output flag:active LOW,open drain output that indicates an over current,3OC O supply under voltage,or over temperature state.4ON I ON control input
5V IN I Supply input:input to the power switch and the supply voltage for the IC –
DNU
–
Do not u
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TPS22941,TPS22942,TPS22943,TPS22944,TPS22945
SLVS832C–NOVEMBER2008–REVISED
ABSOLUTE MAXIMUM RATINGS(1)
MIN MAX UNIT
V I Input voltage range V IN,V OUT,ON–0.36V
T J Operating junction temperature range–40125°C
T stg Storage temperature range–65150°C
Human-Body Model(HBM)4
ESD Electrostatic discharge protection kV
Charged-Device Model(CDM)1
(1)Stress beyond tho listed under absolute maximum ratings may cau permanent damage to the device.The are stress ratings
only,and functional operation of the device at the or any other conditions beyond tho indicated under Recommended Operating Conditions is not implied.Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
THERMAL IMPEDANCE RATINGS
UNIT θJA Package thermal impedance(1)DCK package259°C/W (1)The package thermal impedance is calculated in accordance with JESD51-7.
RECOMMENDED OPERATING CONDITIONS
MIN MAX UNIT
V IN Input voltage 1.62 5.5V
V OUT Output voltage V IN
T A Ambient free-air temperature–4085°C ELECTRICAL CHARACTERISTICS
V IN=1.62V to5.5V,T A=–40°C to85°C(unless otherwi noted)
袋鼠跳技巧PARAMETER TEST CONDITIONS T A MIN TYP(1)MAX UNIT I IN Quiescent current I OUT=0mA,V IN=1.62V to5.5V Full4080μA
V ON=0V(TPS22943/4/5)松花酿酒
V IN=3.6V,
I IN(OFF)OFF-State supply current or Full1μA
V OUT open
V ON=V IN(TPS22941/2)
V ON=0V(TPS22943/4/5)
V IN=3.6V,
I OUT(LEAKAGE)OFF-State switch current or Full1μA
V OUT short to GND
V ON=V IN(TPS22941/2)
25°C0.40.5
V IN=5.5V
Full0.6
25°C0.50.6
V IN=3.3V
Full0.7
25°C0.60.7
r ON ON-state resistance I OUT=20mA V IN=2.5VΩ
Full0.8
25°C0.80.9
天马寨V IN=1.8V
Full 1.1
25°C0.9 1.1
V IN=1.62V
Full 1.2
I ON ON input leakage current V ON=V IN or GND Full1μA
丝绸之路的故事
TPS22941/3406580
I LIM Current limit V IN=3.3V,V OUT=3V Full mA
TPS22942/4/5100150200
Shutdown threshold140 Thermal shutdown Return from shutdown Full130°C
Hysteresis10
(1)Typical values are at V IN=3.3V and T A=25°C.
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TPS22941,TPS22942,TPS22943,TPS22944,TPS22945 SLVS832C–NOVEMBER2008–REVISED NOVEMBER2009
ELECTRICAL CHARACTERISTICS(continued)
V IN=1.62V to5.5V,T A=–40°C to85°C(unless otherwi noted)
PARAMETER TEST CONDITIONS T A MIN TYP(1)MAX UNIT UVLO Undervoltage shutdown V IN increasing Full 1.32 1.42 1.52V Undervoltage shutdown
Full45mV hysteresis
Control Output(OC)
V IN=5V,I SINK=10mA0.10.2 OC output logic low
Vol Full V voltage V
=1.8V,I SINK=10mA0.10.3
IN
OC output high leakage
Ioz V IN=5V,Switch ON Full0.5μA current voltage
Control Input(ON)
VIN=1.8V Full 1.1V
VIN=2.5V Full 1.3V ON high-level input
Vih
voltage VIN=3.3V Full 1.4V
VIN=5.5V Full 1.7V
VIN=1.8V Full0.5V
VIN=2.5V Full0.7V
Vil ON low-level input voltage
VIN=3.3V Full0.8V
VIN=5.5V Full0.9V
ON high-level input
Ii V IN=1.8V to5V,Switch ON Full1μA leakage current
SWITCHING CHARACTERISTICS
属鼠的今日运势V IN=3.3V,R L=500Ω,C L=0.1μF,T A=25°C(unless otherwi noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
t ON Turn-ON time R L=500Ω,C L=0.1μF60μs
t OFF Turn-OFF time R L=500Ω,C L=0.1μF30μs
t r V OUT ri time R L=500Ω,C L=0.1μF10μs
t f V OUT fall time R L=500Ω,C L=0.1μF90μs
t BLANK Over current blanking time TPS22941/2/551020ms
t RSTART Auto-restart time TPS22941/2/54080160ms
V IN=V ON=3.3V,moderate overcurrent condition9μs Short-circuit respon time
V IN=V ON=3.3V,hard short4μs Copyright©2008–2009,Texas Instruments Incorporated Submit Documentation Feedback5雨中的彩虹
