LTC5582IDD View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
'LTC5582IDD' PDF : 16 Pages View PDF
LTC5582
Applications Information
20
200
16
160
12
120
TC2
8
80
4
40
detV2
0
0
012345678
RT2 (kΩ)
5582 F12
Figure 12. 2nd-Order Temperature Compensation Coefficient
TC2 vs RT2 Value
VCC
EN
52k
52k
5582 F13
Figure 13. Enable Pin Simplified Circuit
Enable Interface
A simplified schematic of the EN Pin interface is shown
in Figure 13. The enable voltage necessary to turn on the
LTC5582 is 1V. To disable or turn off the chip, this volt-
age should be below 0.4V. It is important that the voltage
applied to the EN pin should never exceed VCC by more
than 0.3V. Otherwise, the supply current may be sourced
through the upper ESD protection diode connected at the
EN pin. Under no circumstances should voltage be applied
to the EN Pin before the supply voltage is applied to the
VCC pin. If this occurs, damage to the IC may result.
Supply Voltage Ramping
Fast ramping of the supply voltage can cause a current
glitch in the internal ESD protection circuits. Depending on
the supply inductance, this could result in a supply voltage
overshooting at the initial transient that exceeds the maxi-
mum rating. A supply voltage ramp time of greater than
1ms is recommended. In case this voltage ramp time is not
controllable, a small (i.e., 1.5Ω) series resistor should be
inserted in-between VCC Pin and the supply voltage source
to mitigate the problem and self-protect the IC. The R1
shown in Figure 1 is served for this purpose.
5582f
14
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