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MAX1970EEE Datasheet(PDF) 3 Page - Maxim Integrated Products

Part # MAX1970EEE
Description  Dual, 180째 Out-of-Phase, 1.4MHz, 750mA Step- Down Regulator with POR and RSI/PFO
PDF  20 Pages
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Manufacturer  MAXIM [Maxim Integrated Products]
Direct Link  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX1970EEE Datasheet(HTML) 3 Page - Maxim Integrated Products

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Dual, 180° Out-of-Phase, 1.4MHz, 750mA Step-
Down Regulator with POR and RSI/PFO
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS (continued)
(VIN = VCC = VEN = 5V, R POR = 100k
Ω 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
COMP1 AND COMP2
COMP1
Transconductance
FB1 = COMP1,
VCOMP1 = 1.2V
FBSEL1 = unconnected
35
55
85
µS
COMP2
Transconductance
FB2 = COMP2,
VCOMP2 = 1.2V
FBSEL2 = unconnected
35
55
85
µS
LX1 AND LX2
VIN = 5.0V
0.20
0.32
VIN = 3.3V
0.24
0.37
Internal High-Side
MOSFET On-Resistance
ILX = -180mA
VIN =2.6V
0.28
Ω
VIN = 5.0V
0.12
0.23
VIN = 3.3V
0.14
0.25
Internal Low-Side
MOSFET On-Resistance
ILX = 180mA
VIN = 2.6V
0.16
Ω
LX_ Current-Sense
Transresistance
0.4
0.5
0.6
V/A
High side
0.80
1.2
1.60
LX_ Current-Limit
Threshold
Duty Cycle = 100%,
VIN = 2.6V to 5.5V
Low side
-1.6
-0.85
-0.40
A
VLX1 = VLX2 = 5.5V
20
LX_ Leakage Current
VIN = 5.5V
VLX1 = VLX2 = 0
-20
µA
MAX1970/MAX1972
1.2
1.4
1.6
LX_ Switching Frequency
VIN = 2.6V to 5.5V
MAX1971
0.60
0.70
0.80
MHz
LX_ Maximum Duty Cycle
100
%
MAX1970/MAX1972
15
20
LX_ Minimum Duty Cycle
VIN = 2.6V to 5.5V
MAX1971
10
15
%
POR
VOUT rising
92
94
POR Thresholds
Percentage of VOUT,
VIN = 2.6V to 5.5V
VOUT falling
87
90
%
MAX1970
13.3
16.6
20
POR Delay Time (TD)
MAX1971/MAX1972
140
175
210
ms
POR Output Current, High
V POR = VIN = 5.5V, VFB1 = VFB2 = 1.15V
-1
1
µA
POR Output Voltage, Low
VFB1 = 1.05V or VFB2 = 1.05V or RSI = IN (MAX1971 only),
I POR = 1mA
0.01
0.05
V
POR Startup Voltage
FB1 = FB2 = GND, IPOR = 100µA, VIN = 1.2V
0.01
0.05
V



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