Texas Instruments Evaluation Module for Integrated 3.3V / 5V Power LDO with Clock Output TPS51103EVM TPS51103EVM 데이터 시트
제품 코드
TPS51103EVM
4.2.3
Output Connections
4.3
Startup and Test Procedure
4.4
Evaluation Module Configuration
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Test Setup
Configure the output connections in the following order.
Step 1.
Connect LOAD1 and LOAD2 to 5V_OUT and 3.3V_OUT, respectively. Set LOAD1 and
LOAD2 to sink 0 A dc before V
LOAD2 to sink 0 A dc before V
IN
is applied.
Step 2.
Connect voltmeters V4-V7 as shown in
1. Ensure that LOAD1 and LOAD2 are set to constant current mode and to sink 0 A dc.
2. Increase V
2. Increase V
IN
(V1) from 0 V to 10 V dc. 5V_OUT (V4), 3.3V_OUT (V5), and 3.3V_RTC (V6) should
correspond to the specifications shown in
.
3. Vary the LOAD of 5V_OUT and 3.3V_OUT from 0 mA dc to 100 mA dc. 5V_OUT and 3.3V_OUT
should remain within the specifications given
for all load combinations on LOAD up to 100 mA.
4. Vary V
IN
from 5.5 V dc to 28 V dc. 5V_OUT (V4), 3.3V_OUT (V5), and 3.3V_RTC (V6) should
correspond to the specifications shown in
.
5. Keep V
IN
at 12 V. Increase VIN5 (V2) to 5.5 V; then toggle switch S1 as shown in
to enable a 5-V switchover function. Measure 5V_OUT (V4) at a no load condition; V4
should be very close to V2. Measure 15V_OUT (V7) at a no load state; it should be within the limits
given in
given in
6. Keep V
IN
at 12 V. Increase VIN3.3 (V3) to 3.5 V, and toggle switch S2 as shown in
to enable a 3.3-V switchover function. Measure 3.3V_OUT (V5) at a no load condition;
V5 should be very close to V3.
By default, the switchover function is disabled. To enable the switchover function, simply toggle switches
S1 and S2 for a 5-V and 3.3-V switchover, respectively. The position of the switch is opposite of the pins
shorted.
S1 and S2 for a 5-V and 3.3-V switchover, respectively. The position of the switch is opposite of the pins
shorted.
Figure 3. 5-V and 3.3-V Enable Configuration
Figure 4. Switchover Function Enabled
SLUU303A – JUNE 2008 – Revised SEPTEMBER 2008 Using the TPS51103EVM Integrated 3.3-V/5-V Power LDO with Clock Output
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