MAX1970 データシートの表示（PDF） - Maxim Integrated
部品番号
コンポーネント説明
メーカー
MAX1970
Maxim Integrated
MAX1970 Datasheet PDF : 21 Pages
| |||
Dual, 180° Out-of-Phase, 1.4MHz, 750mA Step-
Down Regulator with POR and RSI/PFO
ELECTRICAL CHARACTERISTICS (continued)
(VIN = VCC = VEN = 5V, R POR = 100kΩ to IN, RPFO = 100kΩ to IN, VRSI = 0, CREF = 0.1µF, FBSEL1 = unconnected, FBSEL2 =
unconnected, TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
CONDITIONS
MIN
TYP MAX UNITS
PFO (MAX1970 and MAX1972 Only)
PFO Trip Threshold
IN = VCC
VCC rising
VCC falling
PFO Output Current, High PFO = IN
PFO Output Voltage, Low IPFO = 1mA, VIN = 4.3V
EN AND RSI (MAX1971 Only)
Logic Input Thresholds
IN = 2.6V to 5.5V
VIL
VIH
RSI Input Resistance
Internal pullup resistor to IN
EN Logic Input Current
Logic input at 0 or
VIL
5.5V, VIN = 5.5V
VIH
4.04
4.12
V
3.86
3.94
-1
1
µA
0.01
0.05
V
0.4
0.95
V
1.0
1.6
5
10
20
kΩ
-1
1
µA
-1
1
ELECTRICAL CHARACTERISTICS
(VIN = VCC = VEN = 5V, VFB1 = VFB2 = 1.15V, R POR = 100kΩ to IN, RPFO = 100kΩ to IN, RSI = 0, CVCC = 0.1µF, CREF = 0.1µF,
FBSEL1 = unconnected, FBSEL2 = unconnected, TA = -40°C to +85°C.) (Note 2)
PARAMETER
IN AND VCC
IN Voltage Range
IN Supply Current
IN Shutdown Current
VCC Undervoltage
Lockout Threshold
REF
REF Voltage
REF Shutdown Resistance
REF Soft-Start Current
FB1 AND FB2
CONDITIONS
Switching with no load
VIN = 3.3V
VIN = 5.5V, VEN = 0
VCC rising
VCC falling
MAX1971
MAX1970/MAX1972
MAX1970/MAX1972
MAX1971
IREF = 0, VIN = 2.6V to 5.5V
REF to GND, VEN=0
VREF = 1V
MIN
TYP MAX UNITS
2.6
5.5
V
10
mA
20
20
µA
100
2.55
V
2.20
1.185
20
1.212
V
25
Ω
30
µA
FB_ Regulation Voltage
OUT_ Voltage Range
OUT1 Regulation Voltage
OUT2 Regulation Voltage
Maximum Output Current
FBSEL_ = unconnected, OUT1 = FB1, OUT2 = FB2,
VCOMP_ = 1.20V to 1.80V, VIN = 2.6V to 5.5V
FBSEL_ = unconnected
VIN = 2.6V to 5.5V
VCOMP1 = 1.2V, FBSEL1= GND
VIN = 4.5V to 5.5V
VCOMP1 = 1.2V, FBSEL1 = VCC
VIN = 2.6V to 5.5V
VCOMP2 = 1.2V, FBSEL2 = GND
VCOMP2 = 1.2V, FBSEL2 = VCC
Guaranteed by design (Note 1)
1.185
1.2
1.778
3.259
1.481
2.469
750
1.212
V
VIN
V
1.818
V
3.333
1.515
V
2.525
mA
4 _______________________________________________________________________________________
Share Link: