MAX1687EUE-T Maxim Integrated Products, MAX1687EUE-T Datasheet - Page 5

• Manufacturer Part Number: MAX1687EUE-T
• Description: DC/DC Switching Controllers StepUp w/Prec Adapt Crnt Limit for GSM
• Manufacturer: Maxim Integrated Products

(
V
IN
= +3.3V, V
500mA/div
500mA/div
200mV/div
500mA/div
100mV/div
2V/div
1V/div
OUT
R
(GSM PULSED LOAD 1A, R
CHG
= 5V, V
= 18k , L = 10 H
(R
_______________________________________________________________________________________
Precise, Adaptive Current Limit for GSM
SWITCHING WAVEFORMS
LOAD
SWITCHING WAVEFORMS
POWER-UP WAVEFORM
(FIXED I
= 15 C
LIM
MAX1688
500 s/div
1ms/div
LOAD
5ms/div
= 1V, Figures 6b and 7, T
OUT
= 300mA)
= 2000 F)
CHG
MAX1687/88 toc10a
MAX1687/88 toc14
MAX1687/88 toc12
= 18k )
Step-Up DC-DC Converters with
Typical Operating Characteristics (continued)
I
I
I
V
V
V
LX
LOAD
V
LX
OUT
OUT
OUT
ON
A
= +25°C, unless otherwise noted.
200mA/div
500mA/div
500mA/div
200mV/div
200mA/div
1V/div
0A
(GSM PULSED LOAD 1A, R
R
CHL
= 40.2k , L = 10 H
V
)
SWITCHING WAVEFORMS
ON
INDUCTOR CURRENT
vs. BATTERY CURRENT
MAX1688
1ms/div
10 s/div
2 s/div
CHG
MAX1687/88 toc11
= 40.2k )
MAX1687/88 toc13
MAX1687/88 toc15
I
I
V
V
LX
LOAD
V
I
I
I
V
OUT
LIM
BATTERY
LX
LX
LIM
ON
= 1V
= 0
5