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参数资料
| 型号： | MAX1970 |
| 厂商： | Maxim Integrated Products, Inc. |
| 英文描述： | Dual, 180∑ Out-of-Phase, 1.4MHz, 750mA Step- Down Regulator with POR and RSI/PFO |
| 中文描述： | 双路、180°异相、1.4MHz、750mA、降压型调节器，带有POR和RSI/PFO |
| 文件页数： | 5/20页 |
| 文件大小： | 371K |
| 代理商： | MAX1970 |
M
Dual, 180° Out-of-Phase, 1.4MHz, 750mA Step-
Down Regulator with POR and RSI/PFO
_______________________________________________________________________________________
5
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= V
CC
= V
EN
= 5V, V
FB1
= V
FB2
= 1.15V, R
POR
= 100k
to IN, R
PFO
= 100k
to IN, RSI = 0, C
VCC
= 0.1μF, C
REF
= 0.1μF,
FBSEL1 = unconnected, FBSEL2 = unconnected,
T
A
= -40
°
C to +85
°
C.
) (Note 2)
PARAMETER
CONDITIONS
FBSEL1 = GND
FBSEL1 = V
CC
FBSEL2 = GND
FBSEL2 = V
CC
MIN
30
30
22.5
22.5
TYP
MAX
120
120
90
90
0.1
UNITS
FB1 Input Resistance
Measured from FB1 to
GND
k
FB2 Input Resistance
Measured from FB2 to
GND
k
FB_ Input Bias Current
COMP1 AND COMP2
FB1 or FB2, FBSEL_ = unconnected, V
FB1
= V
FB2
= 1.15V
μA
COMP1
Transconductance
FB1 = COMP1,
V
COMP1
= 1.2V
FBSEL1 = unconnected
35
85
μS
COMP2
Transconductance
FB2 = COMP2,
V
COMP2
= 1.2V
FBSEL2 = unconnected
35
85
μS
LX1 AND LX2
V
IN
= 5.0V
V
IN
= 3.3V
V
IN
= 5.0V
V
IN
= 3.3V
0.32
0.37
0.23
0.25
Internal High-Side
MOSFET On-Resistance
I
LX
= -180mA
Internal Low-Side
MOSFET On-Resistance
I
LX
= 180mA
LX_ Current-Sense
Transresistance
0.4
0.6
V/A
High side
Low side
V
LX1
= V
LX2
= 5.5V
V
LX1
= V
LX2
= 0
MAX1970/MAX1972
MAX1971
MAX1970/MAX1972
MAX1971
0.76
-1.6
1.60
-0.40
20
LX_ Current-Limit
Threshold
Duty cycle = 100%,
V
IN
= 2.6V to 5.5V
A
LX_ Leakage Current
V
IN
= 5.5V
-20
1.2
0.60
μA
1.6
0.80
20
15
LX_ Switching Frequency
V
IN
= 2.6V to 5.5V
MHz
LX_ Minimum Duty Cycle
V
IN
= 2.6V to 5.5V
%
POR
V
OUT
rising
V
OUT
falling
94
POR
Thresholds
Percentage of V
OUT
,
V
IN
= 2.6V to 5.5V
MAX1970
MAX1971/MAX1972
V
POR
= V
IN
= 5.5V, V
FB1
= V
FB2
= 1.15V
V
FB1
= 1.05V or V
FB2
= 1.05V or RSI = IN (MAX1971 only),
I
POR
= 1mA
FB1 = FB2 = GND, I
POR
= 100μA, V
IN
= 1.2V
87
13.3
140
-1
%
20
210
1
POR
Delay Time (T
D
)
ms
POR
Output Current, High
μA
POR
Output Voltage, Low
0.05
V
POR
Start-Up Voltage
0.05
V
相关PDF资料 |
PDF描述 |
|---|---|
| MAX1970EEE | Fixed-Point Digital Signal Processor 532-FCBGA |
| MAX1971 | Fixed-Point Digital Signal Processor 532-FCBGA |
| MAX1972 | Dual, 180∑ Out-of-Phase, 1.4MHz, 750mA Step- Down Regulator with POR and RSI/PFO |
| MAX1972EEE | Fixed-Point Digital Signal Processor 532-FCBGA |
| MAX1973 | Smallest 1A, 1.4MHz Step-Down Regulators |
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