Datasheet

22uF10uF
2.2µH
(3 .. 12)V
TPS62160
680k
130k
VIN
EN
GND
PGND
SW
VOS
PG
FB
100k
10uF
maxINOUTIN
VVV £+
22uF10uF
2.2µH
(3 .. 17)V
TPS62160
51k
200k
VIN
EN
AGND
PGND
SW
VOS
PG
FB
100k
1V / 1A
TPS62160
TPS62161, TPS62162, TPS62163
SLVSAM2C –NOVEMBER 2011–REVISED SEPTEMBER 2013 www.ti.com
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Figure 40. 1V/1A Power Supply
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Application Example As Inverting Power Supply
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The TPS62160 can be used as inverting power supply by rearranging external circuitry as shown in Figure 41.
As the former GND node now represents a voltage level below system ground, the voltage difference between
V
IN
and V
OUT
has to be limited for operation to the maximum supply voltage of 17V (see Equation 13).
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(13)
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Figure 41. -5V Inverting Power Supply
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The transfer function of the inverting power supply configuration differs from the buck mode transfer function,
incorporating a Right Half Plane Zero additionally. The loop stability has to be adapted and an output
capacitance of at least 22µF is recommended. A detailed design example is given in SLVA469.
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