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MAX748A View Datasheet(PDF) - Maxim Integrated

Part Name
Description
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MAX748A Datasheet PDF : 12 Pages
1 2 3 4 5 6 7 8 9 10 Next Last
3.3V, Step-Down,
Current-Mode PWM DC-DC Converters
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 3, V+ = 5V, ILOAD = 0mA, TA = TMIN to TMAX, unless otherwise noted.)
PARAMETER
Efficiency
Supply Current
Shutdown Current
Shutdown Input
Threshold
Shutdown Input
Leakage Current
Short-Circuit Current
Undervoltage Lockout
LX On Resistance
LX Leakage Current
Reference Voltage
Reference Drift
Oscillator Frequency
Compensation Pin
Impedance
CONDITIONS
V+ = 5V
ILOAD = 300mA
ILOAD = 100mA
Includes switch current
SHDN = 0V (Note 1)
VIH
VIL
V+ falling
ILX = 500mA
V+ = 12V, LX = 0
TA = +25°C
TA = TMIN to TMAX
MAX748A
MIN TYP MAX
88
90
1.7
3.0
0.2 100.0
2.0
0.25
1.0
1.2
2.7
3.0
1.0
10
1.15 1.22 1.30
50
159
180 212.5
7500
MAX763A
MIN TYP MAX
88
90
1.4
2.5
0.2 100.0
2.0
0.25
UNITS
%
mA
µA
V
1.0
µA
1.2
A
2.7
3.0
V
1.0
10
nA
1.15 1.22 1.30
V
50
ppm/°C
159
200 212.5 kHz
7500
Note 1: The standby current typically settles to 10µA (over temperature) within 2 seconds; however, to decrease test time, the part
is guaranteed at a 100µA maximum value.
________________________________________________Typical Operating Characteristics
(Circuit of Figure 3, TA = +25°C, VOUT = 3.3V, unless otherwise noted.)
MAXIMUM OUTPUT CURRENT
vs. SUPPLY VOLTAGE
1000
MAX748A
800
MAX763A
600
400
200
NOTE 2
0
0 2 4 6 8 10 12 14 16
SUPPLY VOLTAGE (V)
MAX763A
EFFICIENCY vs. OUTPUT CURRENT
100
95
VIN = 7.0V VIN = 5.0V
90
85
80
VIN = 11.0V
75
70
NOTE 2
65
60
0 100 200 300 400 500 600 700 800
OUTPUT CURRENT (mA)
MAX748A
EFFICIENCY vs. OUTPUT CURRENT
100
VIN = 4.5V
95
90
VIN = 6V
85
80
VIN = 16V
75
VIN = 9V
70
65
VIN = 12V
NOTE 2
60
0 100 200 300 400 500 600 700 800 900
OUTPUT CURRENT (mA)
_________________________________________________________________________________________________ 3
 

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