Wednesday, December 5, 2012

tps2420.pdf download Texas Instruments TI pdf datasheet

. Integrated 30-m. Pass MOSFET . 3.0-V to 20-V Bus Operation . Programmable Fault Current  The TPS2420 provides highly integrated load protection for 3-V to 20-V applications. The TPS2420 protects loads, minimizes inrush current, and safely shuts down in the event of a fault. The programmable 
. Programmable Hard Current Limit . Programmable Fault Timer . Internal MOSFET Power Limiting Foldback  fault current threshold starts the fault timer while allowing the current to pass to the load uninhibited. The programmable current limit threshold sets the maximum current allowed into the load, for both 
. Latching and Auto-Retry Operation  inrush and severe load faults. Both events use the 
. Analog Current Monitor Output . Powergood Output . Fault Output Indicator . 4 mm � 4 mm QFN  programmable timer which inhibits all current to the load when it expires. The dual protection thresholds are useful in applications such as disk drives. The start-up and seek currents are typically higher than the nominal 
. .40�C to 125�C Junction Temperature Range  current and during this time the load needs a low 
. UL Listed -File Number E169910  impedance path to deliver the power. If a failure at the load occurs, the current limit does not allow the 
APPLICATIONS  current to exceed the programmed threshold. This protects both the load and the integrity of the power 
. RAID Arrays  supply. The internal MOSFET is protected by power 
. Telecommunications . Plug-In Circuit Boards  limit circuitry which ensures that the MOSFET remains within its safe operating area (SOA) during all operating states. 
. Disk Drives  The TPS2420 also allows the system to monitor load 
currents with no need for a shunt in the power path. 
The gain of the current monitor can be scaled to the 
application. Fault and power good outputs are 
provided for improved system management and 
sequencing control. 
This device can be programmed to either latch-off or 
retry in the event of a fault. All of this functionality is 
packed into a 16-pin 4 � 4 mm QFN package. 
over operating free-air temperature range (unless otherwise noted)
VIN, VOUT  Voltage range  �0.3 to 25  V
FLT, PG  Voltage range  �0.3 to 20   
IFAULT, IMAX, CT  Voltage  1.75  
FLT, PG  Output sink current  10 mA 
EN  Input voltage range  �0.3 to 6  V 
LTCH  Input current (LTCH internally clamped to 3 V) LTCH = 0 V  35 μA 
Voltage range CT(3), IFLT(3), IMAX, IMON(3), LTCH  �0.3 to 3  V
ESD rating, HBM  2500  
ESD rating, CDM  400  
TJ  Operating junction temperature range  Internally Limited  °C 
Tstg  Storage temperature range  �65 to 150   
(1) Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions beyond those indicated under recommended operating
conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2) All voltage values are with respect to GND.
(3) Do not apply voltage to these pins.

DatasheetDoc-Texas Instruments TI pdf datasheet download


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