MAX724CCK Maxim Integrated Products, MAX724CCK Datasheet - Page 4

• 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: -

ELECTRICAL CHARACTERISTICS (continued)
(V
Note 1: Do not exceed switch-to-input voltage limitation.
Note 2: For switch currents between 1A and 5A (2A for MAX726), maximum switch-on voltage can be calculated via linear
Note 3: By setting the feedback pin (FB) to 2.5V, the V
Note 4: For proper regulation, total voltage from V
Note 5: To avoid extremely short switch-on times, the switch frequency is internally scaled down when V
Note 6: Guaranteed, not production tested.
__________________________________________Typical Operating Characteristics
Error-Amplifier Voltage Gain
Error-Amplifier Transconductance
Error-Amplifier Source Current
Error-Amplifier Sink Current
Feedback Pin Bias Current
Reference Voltage
Reference Voltage Tolerance
Reference Voltage Line Regulation
VC Voltage at 0% Duty Cycle
Thermal Resistance,
Junction to Case (Note 6)
IN
110
100
90
80
70
60
50
= 25V, T
0
STEP-DOWN CONVERTER EFFICIENCY
interpolation.
zero, approximating the zero load condition.
current limit is tested with V
CIRCUIT OF FIGURE 2
1
j
= T
PARAMETER
vs. OUTPUT CURRENT
V
OUTPUT CURRENT (A)
V
OUT
OUT
MIN
2
= 12V, V
= 5V, V
MAX724
to T
_______________________________________________________________________________________
3
IN
MAX
IN
= 15V
= 20V
, unless otherwise noted.)
4
5
FB
6
adjusted to give a 1µs minimum switch-on time.
1V ≤ V
V
V
V
V
VREF (nominal) = 2.21V
All conditions of input voltage, output voltage,
temperature and load current
8V ≤ V
MAX724
MAX726
Switch-Mode DC-DC Regulators
FB
FB
FB
C
= 2V
= 2V
= 2.5V
= VREF
16
14
12
10
IN
C
IN
8
6
4
2
0
≤ 4V
to GND must be ≥ 8V after start-up.
-40
≤ 40V
C
-25
pin is forced to its low clamp level and the switch duty cycle is forced to
vs. JUNCTION TEMPERATURE
CIRCUIT OF FIGURE 2
JUNCTION TEMPERATURE (°C)
V
I
0
OUT
IN
SUPPLY CURRENT
= 25V, V
= 1mA
CONDITIONS
25
5A/2A Step-Down, PWM,
OUT
50
= 5V
75
100
125
T
T
T
T
T
T
T
j
j
j
j
j
j
j
= +25°C
= +25°C
= +25°C
= +25°C
= +25°C
= +25°C
= T
MIN
to T
20
18
16
14
12
10
8
6
4
2
0
MAX
0
QUIESCENT SUPPLY CURRENT
2.155 2.210 2.265
DEVICE NOT SWITCHING
3000 5000 9000
MIN
100
FB
0.6
10
V
V
is less than 1.3V. Switch-
vs. INPUT VOLTAGE
IN
C
= 1V
INPUT VOLTAGE (V)
0.005 0.02
2000
±0.5 ±1.5
±1.0 ±2.5
TYP MAX
140
1.0
0.5
1.5
-4
20
225
1.7
2.5
4.0
2
30
UNITS
mV/°C
µmho
°C/W
%/V
V/V
mA
µA
µA
%
V
V
40
3