Rainbow Electronics MAX17067 - Manual (Page 5)

MAX17067
Low-Noise Step-Up DC-DC Converter
_______________________________________________________________________________________ 5
0
0.5
2.5
2.0
1.5
1.0
3.5
3.0
4.0
2.5 2.9 3.1 3.3 2.7 3.5 3.7 3.9
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX17067 toc04
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
NONSWITCHING
SWITCHING
0V
0A
V OUT
5V/div
INDUCTOR
CURRENT
1A/div
SOFT-START
(R
LOAD
= 18 Ω)
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2ms/div
LOAD-TRANSIENT RESPONSE
(I LOAD = 10mA TO 200mA)
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100 μs/div
L = 3.3 μH
R COMP = 39k Ω
C COMP1 = 620pF
I OUT
200mA/div
10mA
V OUT
500mA/div
AC-COUPLED
0V
INDUCTOR
CURRENT
500mA/div
0A
I OUT
1A/div
0.1A
9V
0V
0A
INDUCTOR
CURRENT
1A/div
V OUT
200mV/div
AC-COUPLED
10 μs/div
PULSED LOAD-TRANSIENT RESPONSE
(I LOAD = 40mA TO 1.1A)
MAX17067 toc07
L = 3.3 μH
R COMP = 39k Ω
C
COMP1
= 620pF
Typical Operating Characteristics (continued)
(Circuit of Figure 1, V IN = 3.3V, f OSC = 640kHz, T A = +25°C, unless otherwise noted.)
LX
5V/div
INDUCTOR
CURRENT
1A/div
0V
0A
1 μs/div
SWITCHING WAVEFORMS
(I LOAD = 500mA)
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