MAX1964 Ver la hoja de datos (PDF) - Maxim Integrated
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Fabricante
MAX1964 Datasheet PDF : 30 Pages
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Tracking/Sequencing Triple/Quintuple
Power-Supply Controllers
ELECTRICAL CHARACTERISTICS (continued)
(VIN = 12V, ILIM = FB = GND, VBST - VLX = 5V, TA = -40°C to +85°C, unless otherwise noted.) (Note 4)
PARAMETER
SYMBOL
NEGATIVE ANALOG GAIN BLOCK
CONDITIONS
MIN TYP
FB5 Regulation Voltage
VB5 = VOUT - 2V, VOUT = 3.5V,
-25
IB5 = 1mA (source)
FB5 to B5 Transconductance Error ∆VFB5 VB5 = 0, IB5 = 0.5mA to 5mA (source)
POWER GOOD (POK)
OUT Trip Level (Preset Mode)
FB Trip Level (Adjustable Mode)
FB2, FB3, FB4 Trip Level
FB5 Trip Level
FB = GND, falling edge, 3% hysteresis (typ)
Falling edge, 3% hysteresis (typ)
Falling edge, 3% hysteresis (typ)
Rising edge, 35mV hysteresis (typ)
2.85
1.058
1.058
325
MAX
+10
-30
3.15
1.17
1.17
675
UNITS
mV
mV
V
V
V
mV
Note 1: Connect VL to IN for operation with VIN < 5V.
Note 2: See Output Voltage Selection section.
Note 3: The internal 5V linear regulator (VL) powers the thermal shutdown block. Shorting VL to GND disables thermal shutdown.
Note 4: Specifications to -40°C are guaranteed by design, not production tested.
Typical Operating Characteristics
(Circuit of Figure 1, VIN = 12V, VOUT = 3.3V, TA = +25°C, unless otherwise noted.)
EFFICIENCY vs. LOAD CURRENT
(PRESET MODE)
100
VIN = 6.5V
90
80
70
60
50
0.01
VIN = 8V
VIN = 12V
VIN = 18V
VIN = 24V
VOUT = 3.3V
0.1
1
10
LOAD CURRENT (A)
OUTPUT VOLTAGE vs. LOAD CURRENT
(PRESET MODE)
3.33
3.32
3.31
3.30
3.29
3.28
3.27
0
0.5 1.0 1.5 2.0 2.5 3.0
LOAD CURRENT (A)
EFFICIENCY vs. LOAD CURRENT
(ADJUSTABLE MODE)
100
VIN = 6.5V
90
80
70
60
50
0.01
VIN = 8V
VIN = 12V
VIN = 18V
VIN = 24V
VOUT = +5.0V
0.1
1
10
LOAD CURRENT (A)
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