0.00

0.05

0.10

0.15

0.20

0.25

0.30

2.5

3.0

3.5

4.0

4.5

5.0

5.5

Input Voltage (V)

C002

PFM

PWM

500µs/div

Output Voltage

1V/div

PG

EN

Input Current

0.2A/div

1.195

1.196

1.197

1.198

1.199

1.200

1.201

1.202

1.203

1.204

0.0

0.2

0.4

0.6

0.8

1.0

1.2

Output Current (A)

3V

4.2V

5V

C005

20µs/div

Output Current

0.5A/div

Output Voltage

50mV/div

40

45

50

55

60

65

70

75

80

85

90

95

100

0.01

0.1

1

10

Output Current (A)

3V

4.2V

5V

C004

20µs/div

Output Current

0.5A/div

Output Voltage

50mV/div

LMZ20501

www.ti.com

SNVS874C – AUGUST 2012 – REVISED APRIL 2015

The following specifications apply to the circuit found in Figure 16 or Figure 17 with the appropriate modifications from

Table 2. These parameters are not tested and represent typical performance only. Unless otherwise stated the following

Figure 27. Load Transients In PWM

Figure 26. Efficiency

Figure 29. Load Transients In AUTO Mode

Figure 28. Regulation, AUTO Mode

Figure 31. Start-Up

Figure 30. AUTO Mode Thresholds

Copyright © 2012–2015, Texas Instruments Incorporated

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