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