1-Cell to 3-Cell, High-Power (1A),
Low-Noise, Step-Up DC-DC Converters
Typical Operating Characteristics (continued)
(Circuit of Figure 1, TA = +25°C, unless otherwise noted.)
LOAD-TRANSIENT RESPONSE
MAX1700-10
POWER-ON DELAY
(PFM MODE)
MAX1700-11
3.3V
A
200mA
A
0A
B
B
2ms/div
VIN = 1.1V, VOUT = 3.3V
A = LOAD CURRENT, 0mA TO 200mA, 0.2A/div
B = VOUT RIPPLE, 50mV/div, AC COUPLED
GSM LOAD-TRANSIENT RESPONSE
MAX1700-12
5V
A
C
0mA
5ms/div
A = VON1, 2V/div
B = VOUT, 1V/div
C = INPUT CURRENT, 0.2A/div
DECT LOAD-TRANSIENT RESPONSE
MAX1700-13
3.3V
A
B
B
0A
0A
1ms/div
VIN = 3.6V, VOUT = 5V, COUT = 440µF
A = VOUT RIPPLE, 200mV/div, AC COUPLED
B = LOAD CURRENT, 100mA TO 1A, 0.5A/div,
PULSE WIDTH = 577µs
2.7
2ms/div
VIN = 1.2V, VOUT = 3.3V, COUT = 440µF
A = VOUT RIPPLE, 200mV/div, AC COUPLED
B = LOAD CURRENT, 50mA TO 400mA, 0.2A/div,
PULSE WIDTH = 416µs
NOISE SPECTRUM
(VOUT = 3.3V, VIN = 1.2V, RLOAD = 50Ω)
0
0.1k
1k
10k
100k
1M
FREQUENCY (Hz)
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