High-Efficiency, PWM, Step-Down
DC-DC Controllers in 16-Pin QSOP
MAX1652–MAX1655
Typical Operating Circuits (continued)
INPUT
6V TO 30V
FROM
REF
V+
SECFB
SHDN
FB
VL
-5V
OUTPUT
MAX1654
DH
BST
+5V
OUTPUT
LX
DL
SS
REF
GND
SYNC
CSL
PGND
CSH
__________________________________________Typical Operating Characteristics
(Circuit of Figure 1,
SKIP
= GND, T
A
= +25°C, unless otherwise noted.)
EFFICIENCY vs.
LOAD CURRENT (3.3V/1A CIRCUIT)
MAX1652 toc01
EFFICIENCY vs.
LOAD CURRENT (3.3V/2A CIRCUIT)
MAX1652 toc02
EFFICIENCY vs.
LOAD CURRENT (3.3V/3A CIRCUIT)
V+ = 6V
90
EFFICIENCY (%)
MAX1652 toc03
100
V+ = 6V
90
EFFICIENCY (%)
100
V+ = 6V
100
90
EFFICIENCY (%)
80
V+ = 28V
70
V+ = 12V
60
MAX1653
f = 300kHz
50
0.001
0.01
0.1
LOAD CURRENT (A)
1
10
80
V+ = 28V
70
V+ = 12V
60
MAX1653
f = 300kHz
50
0.001
0.01
0.1
LOAD CURRENT (A)
1
10
80
70
V+ = 12V
60
V+ = 28V
MAX1653
f = 300kHz
50
0.001
0.01
0.1
LOAD CURRENT (A)
1
10
6
_______________________________________________________________________________________
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
