Test Setup
2-4
EVM Adjustments and Test Points
5) Verify that the output voltage (measured at the V
OUT1
and V
OUT2
pins re-
spectively) has the desired value.
6) Table 2–4 shows the three recommended options for loading each regula-
tor.
Table 2–4. Regulator Loading Options
Type
JP5–Regulator 1
JP6–Regulator 2
SW_1
External Load
Continuous load off-board
Open
Off
Connected
Continuous load onboard
Shorted
On/off
Not connected
Pulsed load onboard
Open
On
Not connected
Jumpers JP7 – JP11 and JP12 – JP16 vary the current through the onboard
resistors from 0 to max load current for regulator 1 and regulator 2 respectively.
Figure 2–1. Test Setup
+
–
Power Supply
5–V, 1–A Supply
External
Load
0–500 mA
+
–
Power Supply
12–V, 0.25–A Supply
External
Load
0–250 mA
All wire pairs should be twisted.
Transient Generator Enable
Output 1 Load
Output 2 Load
+
–
+
–
Dual – Output LDO EVM
SLVP152
Rev. C
The PG_1 LED indicator (D4) has V
on
= 2.1 V; therefore, for this test board,
the maximum PG_1 output voltage (TP11) is 2.1 V. Since the PG_1 pin is an
open drain, active high output terminal in a typical application, the PG_1 output
could have a typical TTL range.
Summary of Contents for TPS70151 Series
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