MAX724CCK Maxim Integrated Products, MAX724CCK Datasheet - Page 7

• Manufacturer Part Number: MAX724CCK
• Description: IC DC/DC REG PWM STP-DWN TO220-5
• Manufacturer: Maxim Integrated Products
• Type: Step-Down (Buck), Step-Up (Boost), Inverting, Flybackr

Specifications of MAX724CCK

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 2.5 ~ 35 V
• Current - Output: 5A
• Frequency - Switching: 100kHz
• Voltage - Input: 8 ~ 40 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Through Hole
• Package / Case: TO-220-5 (Straight Leads)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power - Output: -

5A/2A Step-Down, PWM,
Switch-Mode DC-DC Regulators
In DCM, ringing occurs at V
switch off-cycle. This is due to the inductor resonating
with the parallel capacitance of the catch diode and the
V
appear at the output. Furthermore, attempts to damp
this ringing by adding circuitry will reduce efficiency
and are not advised. No off-state ringing occurs in
CCM because the diode always conducts during the
switch-off time and consequently damps any reso-
nance at V
Figure 1. MAX724 Block Diagram
Figure 2. Basic Step-Down Converter
6
FB
V
0.01 F
8V TO 40V
SW
C
220 F
INPUT
2.7k
_______________________________________________________________________________________
C2
R3
node. This ringing is harmless and does not
MAX724
2.21V
SW
REF
V
V
IN
C
.
AMPLIFIER
MAX724
MAX726
ERROR
GND
INTERNAL
BIAS
V
SW
FB
GND
OSCILLATOR
100kHz
SW
CONTROL
100 H (MAX726)
50 H (MAX724)
LOGIC
D
MBR745
PWM
in the latter part of the
L
CURRENT-LIMIT
COMPARATOR
SWITCH
5V at 5A (MAX724)
5V at 2A (MAX726)
R1
2.8k
R2
2.2k
OUTPUT
C1
470 F
V
V
SW
IN
Table 1 lists component suppliers for inductors, capaci-
tors, and diodes appropriate for use with the
MAX724/MAX726. Be sure to observe specified ratings
for all components.
Table 1. Component Suppliers
Surface-Mount Components (for designs typically below 2A)
Inductors:
Capacitors:
Diodes:
Through-Hole Components
Inductors:
Capacitors:
Diodes:
_______________Component Selection
Sumida Electric - CDR125 Series
Coiltronics - CTX series
Matsuo - 267 series
Sprague - 595D series
Motorola - MBRS series
Nihon - NSQ series
Sumida - RCH-110 series
Cadell-Burns - 7070, 7300, 6860, and 7200 series
Renco - various series
Coiltronics - various series
Nichicon - PL series low-ESR electrolytics
United Chemi-Con - LXF series
Sanyo - OS-CON low-ESR organic semiconductor
General Purpose - 1N5820-1N5825
Motorola - MBR and MBRD series
USA:
Japan: Phone [phone]
USA:
USA:
Japan: Phone [phone]
USA:
USA:
USA:
Japan: Phone [phone]
(see above for phone number)
USA:
USA:
(see above for phone number)
USA:
Japan: Phone [phone]
USA:
USA:
Japan: Phone 81-7-2070-6306
(see above for phone number)
Phone [phone]
FAX [phone]
Phone [phone]
FAX [phone]
Phone [phone]
FAX [phone]
Phone [phone]
FAX [phone]
Phone [phone]
FAX [phone]
Phone [phone]
FAX [phone]
FAX [phone]
Phone [phone]
FAX [phone]
Phone [phone]
FAX [phone]
Phone [phone]
FAX [phone]
FAX [phone]
Phone [phone]
FAX [phone]
Phone [phone]
FAX [phone]
FAX 81-7-2070-1174