Manual

MAX1700/MAX1701
1-Cell to 3-Cell, High-Power (1A),
Low-Noise, Step-Up DC-DC Converters
_______________________________________________________________________________________ 7
V
IN
= 1.2V, V
OUT
= 3.3V, C
OUT
= 440µF
A = V
OUT
RIPPLE, 200mV/div, AC COUPLED
B = LOAD CURRENT, 50mA TO 400mA, 0.2A/div,
PULSE WIDTH = 416µs
DECT LOAD-TRANSIENT RESPONSE
A
B
3.3V
0A
2ms/div
MAX1700-13
Typical Operating Characteristics (continued)
(Circuit of Figure 1, T
A
= +25°C, unless otherwise noted.)
2.7
0.1k 1k 10k 100k 1M
NOISE SPECTRUM
(V
OUT
= 3.3V, V
IN
= 1.2V, R
LOAD
= 50Ω)
0
MAX1700-14
FREQUENCY (Hz)
NOISE (mV
RMS
)
A = V
ON1
, 2V/div
B = V
OUT
, 1V/div
C = INPUT CURRENT, 0.2A/div
POWER-ON DELAY
(PFM MODE)
A
B
C
0mA
3.3V
5ms/div
MAX1700-11
V
IN
= 3.6V, V
OUT
= 5V, C
OUT
= 440µF
A = V
OUT
RIPPLE, 200mV/div, AC COUPLED
B = LOAD CURRENT, 100mA TO 1A, 0.5A/div,
PULSE WIDTH = 577µs
GSM LOAD-TRANSIENT RESPONSE
A
5V
0A
B
1ms/div
MAX1700-12
V
IN
= 1.1V, V
OUT
= 3.3V
A = LOAD CURRENT, 0mA TO 200mA, 0.2A/div
B = V
OUT
RIPPLE, 50mV/div, AC COUPLED
LOAD-TRANSIENT RESPONSE
A
B
0A
200mA
2ms/div
MAX1700-10