LMZ21700 Datasheet, PDF (23/37 Pages) Texas Instruments – LMZ21700 650 mA SIMPLE SWITCHER® Nano Module with 17 V Maximum Input Voltage

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VOUT RIPPLE
COUT = 22F 10V 0805 X5R
Taiyo Yuden MK212BJ226MG-T
LMZ21700
SNVS872C – AUGUST 2012 – REVISED NOVEMBER 2014
VOUT RIPPLE
WITH 500MHz SCOPE BANDWIDTH
COUT1 = 22F 10V 0805 X5R
Taiyo Yuden MK212BJ226MG-T
COUT2 = 3x1000pF 0805 NP0
Johanson Dielectrics 500R15N102JV4T
10mV/Div
50mV/Div
20MHz BW
1µs/Div
Figure 74. 20 MHz Oscilloscope Bandwidth
Output Voltage Ripple V_OUT = 5.0 V
2.5
2.0
1.5
1.0
0.5
VOUT=5.0V
0.0
0 2 4 6 8 10 12 14 16 18
INPUT VOLTAGE (V)
C001
Figure 76. Typical Switching Frequency at 650 mA Load
V_OUT = 5.0 V
5.04
5.035
5.03
5.025
VIN = 9 V
VIN = 12 V
VIN = 15 V
VIN = 17 V
5.02
5.015
5.01
5.005
5
4.995
4.99
0.0001
0.001
0.01
0.1
1
Load Current (A)
D022
Figure 78. Line and Load Regulation V_OUT = 5.0 V
500MHz BW
1µs/Div
Figure 75. 500 MHz Oscilloscope Bandwidth, 3x1000 pF
additional output capacitance
Output Voltage Ripple and HF Noise V_OUT = 5.0 V
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0 2 4 6 8 10 12 14 16 18
INPUT VOLTAGE (V)
C001
Figure 77. Typical Current Limit V_OUT = 5.0 V, T_A = 85 °C
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
60
VIN = 9 V
VIN = 12 V
VIN = 15 V
VIN = 17 V
70
80
90
100 110 120 130
Ambient Temperature (SC)
C001
Figure 79. Thermal Derating for θ_JA = 47ºC/W, V_OUT = 5.0 V
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