ML4903 Ver la hoja de datos (PDF) - Micro Linear Corporation
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ML4903 Datasheet PDF : 12 Pages
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ABSOLUTE MAXIMUM RATINGS
Absolute maximum ratings are those values beyond which
the device could be permanently damaged. Absolute
maximum ratings are stress ratings only and functional
device operation is not implied.
VDD ........................................................................................... 13.5V
VCC .................................................................................................. 7V
Peak Driver Output Current ....................................... ±2A
VFB Voltage ...................................... GND - 0.3V to 5.5V
ISENSE Voltage .................................. GND - 0.5V to 5.5V
All Other Inputs .................... GND - 0.3V to VDD
SHDN Input Current ..............................................
+ 0.3V
100mA
ML4903
Junction Temperature .............................................. 150°C
Storage Temperature Range ..................... –65°C to 150°C
Lead Temperature (Soldering, 10 sec) ..................... 260°C
Thermal Resistance (qJA) .................................... 100°C/W
OPERATING CONDITIONS
Temperature Range ....................................... 0°C to 70°C
VDD Range .............................................. 11.4V to 12.6V
VCC Range ............................................... 4.75V to 5.25V
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, VDD = 12V, VCC = SHDN = 5V, TA = Operating Temperature Range (Note 1)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
REFERENCE
VREF Output Voltage
3.51 3.535
Line Regulation
11V < VDD < 13V
0.5
UV LOCKOUT
VDD Start-up Threshold
VDD Hysteresis
VCC Start-up Threshold
VCC Hysteresis
10.0
300
4.25
300
10.5
450
4.4
400
SHUTDOWN
Input Low Voltage
Input High Voltage
2.0
Delay to Output
50
POWER GOOD COMPARATOR
Output Voltage in Regulation
5kW pull-up to 5V
4.8
Output Voltage out of Regulation
Output Voltage in Shutdown
VFB < 90% VDAC or >110% VDAC
W SHDN = 0V, 5k pull-up to 5V
BUCK REGULATOR
Oscillator Frequency
160
200
Duty Cycle Ratio
RANGE = 1, VFB = 0V,
80
DAC (D3-D0) Code = 0100
RANGE = 1, VFB > 3.193V,
DAC (D3-D0) Code = 0100
DAC (RANGE, D3-D0) Input Low Voltage
DAC (RANGE, D3-D0) Input High Voltage
2.0
MAX
3.56
10.8
600
4.6
500
0.8
0.4
0.4
230
98
0
0.8
UNITS
V
mV/V
V
mV
V
mV
V
V
ns
V
V
V
kHz
%
%
V
V
3
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