MAX1830 Ver la hoja de datos (PDF) - Maxim Integrated
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MAX1830 Datasheet PDF : 13 Pages
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3A, 1MHz, Low-Voltage, Step-Down Regulators with
Synchronous Rectification and Internal Switches
ELECTRICAL CHARACTERISTICS (continued)
(VIN = VCC = +3.3V, FBSEL = GND, TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
Shutdown Supply Current
Thermal Shutdown Threshold
Undervoltage Lockout Threshold
FB Input Bias Current
Off-Time
Startup Off-Time
Minimum On-Time
Soft-Start Time (Note 3)
SHDN Input Current
SHDN Logic Input Low Voltage
SHDN Logic Input High Voltage
FBSEL Input Current
TSHDN
VUVLO
IFB
tOFF
SHDN = GND, into VCC and IN pins; LX = 0
or 3.3V
SHDN = GND, into IN with LX = 0
SHDN = GND, into IN with LX = 3.3V
Hysteresis = 15°C
VIN falling, hysteresis = 90mV
VFB = 1.2V
RTOFF = 110kΩ
RTOFF = 44kΩ
RTOFF = 440kΩ
tON (Note 2)
ISHDN
VIL
VIH
SHDN = 0 or VCC
0.2
20
0.2
20
0.1
20
165
1.8
2.6
2.8
0
70
300
0.85 1.00 1.15
0.3
0.4
0.5
3.0
3.9
5.0
4 ✕ tOFF
0.40
3 ✕ 256
-0.5
0.5
0.8
2.0
-5
5
µA
°C
V
nA
µs
µs
µs
µs
µs
cycles
µA
V
V
µA
FBSEL = GND
0.2
V
FBSEL = REF
0.9
1.3
V
FBSEL Logic Thresholds
FBSEL = unconnected
0.7 ✕ VCC
- 0.2
0.7 ✕ VCC
V
+ 0.2
FBSEL = VCC
VCC - 0.2
VCC + 0.2 V
ELECTRICAL CHARACTERISTICS
(VIN = VCC = +3.3V, FBSEL = GND, TA = -40°C to +85°C, unless otherwise noted.) (Note 5)
PARAMETER
Input Voltage
Preset Output Voltage
SYMBOL
CONDITIONS
VIN, VCC
FBSEL = VCC
VOUT
VIN = +3V to +5.5V,
ILOAD = 0 to 3A,
VFB = VOUT
FBSEL =
unconnected
FBSEL = REF
(MAX1830)
FBSEL = GND
VIN = +3.7V to +5.5V,
ILOAD = 0 to 3A,
VFB = VOUT
FBSEL = REF
(MAX1831)
MIN TYP MAX UNITS
3.0
5.5
V
2.475
2.575
1.485
1.545
1.782
1.078
1.854
V
1.122
3.267
3.399
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