Datasheet

V
20 mV/div
POS
Vswpos
2 V/div
Vswneg
10 V/div
Positive
Inductor
current
200 mA/div
V = 3.7 V,
V = 4.63 V,
V = -4.93 V,
I = 150 mA
IN
O
POS
NEG
250 ns/div
V
20 mV/div
POS
Vswpos
2 V/div
Vswneg
10 V/div
Positive
Inductor
current
200 mA/div
V = 4.5 V,
V = 4.63 V,
V = -4.93 V
I = 150 mA
IN
O
POS
NEG
250 ns/div
V
2 V/div
POS
V
2 V/div
NEG
V = 3.6 V,
V = 4.63 V,
V = -4.93 V to -3 V,
RLoad = 600 ,
C = 47 nF
IN
T
POS
NEG
W
200 s/divm
V
2 V/div
CTRL
V = 3.7 V,
V = 4.63 V,
V = -4.93 V,
I = 20 mA
IN
O
POS
NEG
250 ns/div
V
20 mV/div
POS
Vswpos
2 V/div
Vswneg
10 V/div
Positive
Inductor
current
200 mA/div
70
75
80
85
90
95
100
-5.5 -5 -4.5 -4 -3.5 -3 -2.5 -2
V - V
NEG
Efficiency - %
V = 3.7 V,
V = 4.63 V,
I = 100 mA,
L = 4.7 H TDK VLF4012
IN
POS
O
m
10 ms/div
V
2 V/div
POS
V
2 V/div
NEG
V = 3.6 V,
V = 4.63 V,
V = -4.93 V to -3 V,
I = 50 mA,
C = 47 nF
IN
O
T
POS
NEG
TPS65137
www.ti.com SLVS929A –MAY 2010–REVISED OCTOBER 2012
Figure 3. EFFICIENCY Figure 4. NEGATIVE OUTPUT VOLTAGE PROGRAMMING
Figure 5. NEGATIVE OUTPUT VOLTAGE PROGRAMMING Figure 6. LIGHT LOAD CURRENT OPERATION
(Device enabled (CTRL = 400µs high),
programmed to –3.0V)
Figure 7. NOMINAL LOAD CURRENT OPERATION Figure 8. NOMINAL LOAD CURRENT OPERATION
(V
IN
= 3.7V) (V
IN
= 4.5V)
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