Datasheet

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2.1.1 TP1 – Output Power
2.1.2 TP2, TP7, TP8, TP9 – Ground
2.1.3 TP3 – Overcurrent
2.1.4 TP4 – Input Power
2.1.5 TP5 – Enable
2.2 Electrical Specifications
2.3 Test Results
Setup
This is the output of the DC/DC power supply. Connect a load between the two terminals of this test point
with reference to one of the ground points.
Any of these test points can be used as references to the input, output, and oscilloscope probes.
When the output load exceeds the current-limit threshold or a short is present, the device limits the output
current to a safe level by switching into a constant-current mode, pulling the overcurrent logic output low.
Apply the input voltage here. Recommended range is 2.7 V to 5.5 V. Note that 6 V is the absolute
maximum and –0.3 V is the absolute minimum, so it is extremely important not to exceed these limits.
The enable input is active-low for the TPS2041B and active-high for the TPS2051B. To turn the
TPS2041B on, this point must be tied to a low potential. To turn the TPS2051B on, this point must be tied
to a high potential. The negative terminal (active-low) and the positive terminal (active-high) of the power
supply are recommended points.
Parameters Test Conditions Min Typ Max Unit
Vin Input voltage 2.7 5.5 V
Continuous output
I
o(out)
0 500 mA
current
Rdson V
I(IN)
= 5 V or 3.3 V, I
O
= 0.5 A, –40 ° C ≤ T
J
≤ 125 ° C 95 140 m Ω
The figures in this section come from testing the TPS2041B EVM, which has an active-low enable.
2 TPS2041B/51B EVM Power-Distribution Switch SLVU199A – March 2007 – Revised June 2007
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