TPS65142
SLVSAX5 –JULY 2011
www.ti.com
SW = 5 V/div
VGH
VIN = 3.3 V
VS = 9 V, IS = 100 mA
VGH = 21.5 V,
DRVP = 5 V/div
VIN = 3.3 V
IGH = 5 mA to 15 mA
VS = 9 V, IS = 100 mA
VGH = 24 V, IGH = 20 mA
IGH
VGH = 20 mV/div
IL
Time = 2 ms / div
Time = 1 ms / div
Figure 5. POSITIVE CHARGE PUMP OUTPUT VOLTAGE
RIPPLE
Figure 6. POSITIVE CHARGE PUMP LOAD TRANSIENT
RESPONSE
27
VIN = 4.2 V
VS = 10 V
VGH = 24 V
26
25
24
-40oC
25oC
VIN = 3.3 V, VS = 9 V, IS = 100 mA
DRVN = 2 V/div
23
22
VGL = -5.8 V, IGL = 20 mA
85oC
21
20
VGL = 50 mV/div
Time = 1 ms / div
0
0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1
Output Current [A]
Figure 7. POSITIVE CHARGE PUMP VOLTAGE vs LOAD
CURRENT
Figure 8. NEGATIVE CHARGE PUMP OUTPUT VOLTAGE
RIPPLE
12
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