MAX763ACSA Datasheet Download

Part No.:
MAX763ACSA
Download:
Download Datasheet
Description:
[3.3V, Step-Down, Current-Mode PWM DC-DC Converters]
File Size:
136 K
Page:
12 Pages
Logo:
Manufacturer:
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
PCB Prototype
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3.3V, Step-Down,
Current-Mode PWM DC-DC Converters
MAX748A/MAX763A
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 3, V+ = 5V, I
LOAD
= 0mA, T
A
= T
MIN
to T
MAX
, 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
V+ falling
I
LX
= 500mA
V+ = 12V, LX = 0
T
A
= +25°C
T
A
= T
MIN
to T
MAX
159
1.15
1.2
2.7
1.0
10
1.22
50
180
7500
212.5
159
1.30
1.15
3.0
V+ = 5V
CONDITIONS
I
LOAD
= 300mA
I
LOAD
= 100mA
Includes switch current
SHDN
= 0V (Note 1)
V
IH
V
IL
2.0
0.25
1.0
1.2
2.7
1.0
10
1.22
50
200
7500
212.5
1.30
3.0
MAX748A
TYP
MAX
88
90
1.7
0.2
3.0
100.0
2.0
0.25
1.0
µA
A
V
nA
V
ppm/°C
kHz
MAX763A
TYP
MAX
88
90
1.4
0.2
2.5
100.0
mA
µA
V
UNITS
%
MIN
MIN
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, T
A
= +25°C, V
OUT
= 3.3V, unless otherwise noted.)
MAXIMUM OUTPUT CURRENT
vs. SUPPLY VOLTAGE
1000
MAX748A
MAXIMUM OUTPUT CURRENT (mA)
800
MAX763A
EFFICIENCY (%)
600
90
85
80
75
70
NOTE 2
NOTE 2
65
60
0
2
4
6
8
10 12
SUPPLY VOLTAGE (V)
14
16
0
100 200 300 400 500 600 700 800
OUTPUT CURRENT (mA)
65
60
0
100 200 300 400 500 600 700 800 900
OUTPUT CURRENT (mA)
VIN = 11.0V
EFFICIENCY (%)
90
85
80
75
70
VIN = 9V
VIN = 12V
NOTE 2
VIN = 16V
100
95
VIN = 7.0V
VIN = 5.0V
MAX763A
EFFICIENCY vs. OUTPUT CURRENT
100
95
MAX748A
EFFICIENCY vs. OUTPUT CURRENT
VIN = 4.5V
VIN = 6V
400
200
0
_________________________________________________________________________________________________
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