Datasheet

short-circuit protection
I
OUT
= 0.1 A
I
OUT
= 0.2 A
I
OUT
= 0.3 A
I
OUT
= 0.4 A
I
OUT
= 0.5 A
3
0.00
6 9 12 15
0.05
0.10
0.15
0.20
0.25
0.30
V
OUT
− Output Voltage − V
(V
IN
−V
OUT
) − Dropout Voltage − V
DROPOUT VOLTAGE
vs
OUTPUT VOLTAGE
V
OUT
= −15 V
V
OUT
= −12 V
V
OUT
= −5 V
0.05
0.05
0.15
0.10
0.25 0.35 0.45
0.15
0.20
0.25
I
OUT
− Load Current − A
DROPOUT VOLTAGE
vs
LOAD CURRENT
(V
IN
−V
OUT
) − Dropout Voltage − V
V
OUT
= −3.3 V
DROPOUT VOLTAGE
vs
TEMPERATURE
(V
IN
−V
OUT
) − Dropout Voltage − V
V
OUT
= −3.3 V
V
OUT
= −5 V
V
OUT
= −15 V
V
OUT
= −12 V
−50 −25 0 50 7525 100
0.05
0.10
0
0.20
0.25
0.15
0.35
0.40
0.30
T
A
− Free-Air Temperature − _C
UCC284-EP
SLVS862A – NOVEMBER 2008 – REVISED NOVEMBER 2008 ....................................................................................................................................... www.ti.com
The UCC284 provides unique short-circuit protection circuitry that reduces power dissipation during a fault. When
an overcurrent condition is detected, the device enters a pulsed mode of operation, limiting the output to a 2.5%
duty cycle. This reduces the heat sink requirements during a fault. The operation of the UCC284 during an
overcurrent condition is shown in Figure 5 .
Figure 2. Figure 3.
Figure 4.
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Product Folder Link(s): UCC284-EP