TFT-LCD Step-Up DC-DC Converter
Typical Operating Characteristics (continued)
(Circuit of Figure 1. VIN = 5V, VMAIN = 15V, TA = +25°C unless otherwise noted.)
SOFT-START
(RLOAD = 30Ω)
MAX8727 toc07
1ms/div
VOUT
5V/div
OV
INDUCTOR
CURRENT
1A/div
OA
LOAD-TRANSIENT RESPONSE
(ILOAD = 50mA TO 550mA)
MAX8727 toc08
15V
VOUT
5mV/div
AC-COUPLED
IOUT
500mA/div
50mA
INDUCTOR
CURRENT
1A/div
OA
1μs/div
PULSED LOAD-TRANSIENT RESPONSE
(ILOAD = 100mA TO 1.1A)
MAX8727 toc09
15V
VOUT
5mV/div
AC-COUPLED
IOUT
1A/div
0.1A
INDUCTOR
CURRENT
1A/div
OA
1μs/div
SWITCHING WAVEFORMS
(ILOAD = 600mA)
MAX8727 toc10
LX
10V/div
OV
1μs/div
INDUCTOR
CURRENT
1A/div
OA
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