参数资料
型号: TPS40021PWP
厂商: TEXAS INSTRUMENTS INC
元件分类: 稳压器
英文描述: 0.01 A SWITCHING CONTROLLER, 1100 kHz SWITCHING FREQ-MAX, PDSO16
封装: GREEN, PLASTIC, HTSSOP-16
文件页数: 20/36页
文件大小: 724K
代理商: TPS40021PWP
TPS40020
TPS40021
SLUS535D MARCH 2003 REVISED JULY 2007
www.ti.com
27
REFERENCE DESIGN
TEST RESULTS
Efficiency Curves
The tested efficiency at different loads and input voltages are shown in Figure 29. The maximum efficiency is
as high as 93% at 1.5-V output. The efficiency is around 88% when the load current (ILOAD) is 20 A.
0.80
0.75
0.85
0.90
0.95
0.70
0
5
10
15
20
EFFICIENCY
vs
OUTPUT LOAD CURRENT
ILOAD Load Current A
Efficiency
%
VIN = 2.5 V
VIN = 4.0 V
VIN = 5.0 V
VIN = 3.3 V
Figure 29.
Typical Operating Waveforms
Typical operating waveforms are shown in Figure 30 and 31.
Figure 30
t Time 1
s/div
VIN = 3.3 V
ILOAD = 20 A
VSW (2 V/div)
Figure 31
t Time 1
s/div
VOUTac (10 mV/div)
VIN = 3.3 V
ILOAD = 20 A
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