MAX1686 Datasheet, PDF (11/12 Pages) Maxim Integrated Products – Step-Up DC-DC Converters with Precise, Adaptive Current Limit for GSM

Step-Up DC-DC Converters with
Precise, Adaptive Current Limit for GSM
10µH
V_IN
2.7V TO 6V
0.1µF
LX1
LX2
LX1
LX2
IN
MAX1687 _OUT
IN
OUT
47µF
REF*
ON
ON
OFF
LIM
FB
AGND
PGND
PGND
V_OUT = 5V
350mA
R2
187k
47µF
R1
61.9k
*TSSOP PACKAGE ONLY
Figure 6b. MAX1687 Typical Application Circuit (Fixed Non-Pulsed Load)
10µH
V_IN
2.7V TO 6V
0.1µF
LX1
LX2
LX1
LX2
IN
MAX1688 ^OUT
IN
OUT
47µF
R_CHG
40.2k
CHG
ON
ON
OFF
REF
FB
AGND
PGND
PGND
V_OUT = 5V
2A AT 12%
DUTY CYCLE
R2
187k
2000µF
R1
61.9k
Figure 7. MAX1688 Typical Application Circuit (GSM Pulsed Load)
______________________________________________________________________________________________________ 11