max738a Maxim Integrated Products, Inc., max738a Datasheet - Page 12

• Manufacturer Part Number: max738a
• Description: 5v, Step-down, Current-mode Pwm Dc-dc Converters
• Manufacturer: Maxim Integrated Products, Inc.

5V, Step-Down,
Current-Mode PWM DC-DC Converters
Figure 2. Block Diagram of Soft-Start Circuitry
Figure 3. Standard +5V Step-Down Application Circuit
12
*
SEE TABLE 2 FOR COMPONENT VALUES AND SUPPLIERS.
0.1 F
510k
C1
R1
______________________________________________________________________________________
510k
C1
FROM SHDN
R1
MAX730A +5.2V TO +11.0V
MAX738A/MAX744A +6.0V TO +16.0V
1
3
SHDN
SS
GND
SS
MAX730A
MAX738A
MAX744A
6
8
V+
REF
2
OUT
1M
±35%
CC
LX
C6
0.01 F
1.23V
7
5
4
C2
1 F
C3
*
D1
1N5817
C5
330pF
MAX730A
MAX738A
MAX744A
SS CLAMP
L1
C4
*
*
OUTPUT
+5V
NOTE: PIN NUMBERS REFER TO 8-PIN PACKAGES.
MAX730A
MAX738A
MAX744A
PART
INPUT SUPPLY RANGE (V)
10.2 to 16.0
6.0 to 11.0
6.0 to 16.0
9.0 to 16.0
6.0 to 9.0
OPTIONAL LOWPASS OUTPUT FILTER
OUTPUT
25 H
L2
2.2 F
GUARANTEED OUTPUT CURRENT AT 5V (mA)
C7
OUTPUT
FILTER
450
450
750
500
750