TPS62620_16 Datasheet, PDF (16/28 Pages) Texas Instruments – 600-mA, 6-MHz High-Efficiency Step-Down Converter In Chip Scale Packaging

TPS62620, TPS62621, TPS62622
TPS62623, TPS62624, TPS62625
SLVS848D – JULY 2009 – REVISED OCTOBER 2015
200 to 600 mA Load Step
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10 to 350 mA Load Sweep
V_OUT = 1.2 V
t - Time - 5 µs/div
V_IN = 3.6 V
MODE = Low
Figure 24. Load Transient Response in PFM/PWM
Operation, V_OUT = 1.2 V, V_IN = 3.6 V
10 to 375 mA Load Sweep
V_OUT = 1.2 V
t - Time - 10 µs/div
V_IN = 3.6 V
MODE = Low
Figure 26. AC Load Transient Response, V_OUT = 1.2 V,
V_IN = 3.6 V
1.224
1.212
V_I = 4.8 V, PFM/PWM Operation
V_I = 3.6 V, PFM/PWM Operation
1.2
V_I = 3.6 V, PWM Operation
1.188
V_I = 2.5 V, PFM/PWM Operation
1.176
0.1
V_OUT = 1.2 V
1
10
100
1000
I_O - Load Current - mA
PFM/PWM Operation
Figure 28. DC Output Voltage vs Load Current,
V_OUT = 1.2 V
V_OUT = 1.82 V
t - Time - 10 µs/div
V_IN = 3.6 V
MODE = Low
Figure 25. AC Load Transient Response, V_OUT = 1.82 V,
V_IN = 3.6 V
1.857
1.839
V_I = 4.8 V, PFM/PWM Operation
V_I = 3.6 V, PFM/PWM Operation
1.820
V_I = 3.6 V, PWM Operation
1.802
V_I = 2.5 V, PFM/PWM Operation
1.784
0.1
V_OUT = 1.82 V
1
10
100
1000
I_O - Load Current - mA
PFM/PWM Operation
Figure 27. DC Output Voltage vs Load Current,
V_OUT = 1.82 V
220
Always PWM
200
180
160
PFM to PWM
140 _{Mode Change}
120
The Switching Mode
Changes at These Borders
100
80
60
40
PWM to PFM
Mode Change Always PFM
20
0
2.5 2.8 3.1 3.4 3.7 4.0 4.3 4.6 4.9 5.2 5.5
V_I - Input Voltage - V
V_OUT = 1.82 V
Mode Change
Figure 29. PFM/PWM Boundaries, V_OUT = 1.82 V
16
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