MAX1972EEE+ Maxim Integrated Products, MAX1972EEE+ Datasheet - Page 5

• Manufacturer Part Number: MAX1972EEE+
• Description: IC REG STP DWN 750MA 16-QSOP
• Manufacturer: Maxim Integrated Products
• Type: Step-Down (Buck)r

Specifications of MAX1972EEE+

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 2
• Voltage - Output: 1.5V, 1.8V, 2.5V, 3.3V, Adj
• Current - Output: 750mA
• Frequency - Switching: 1.4MHz
• Voltage - Input: 2.6 ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-QSOP
• Power - Output: 667mW
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

ELECTRICAL CHARACTERISTICS (continued)
(V
FBSEL1 = unconnected, FBSEL2 = unconnected, T
FB1 Input Resistance
FB2 Input Resistance
FB_ Input Bias Current
COMP1 AND COMP2
COMP1
Transconductance
COMP2
Transconductance
LX1 AND LX2
Internal High-Side
MOSFET On-Resistance
Internal Low-Side
MOSFET On-Resistance
LX_ Current-Sense
Transresistance
LX_ Current-Limit
Threshold
LX_ Leakage Current
LX_ Switching Frequency
LX_ Minimum Duty Cycle
POR
POR Thresholds
POR Delay Time (T
POR Output Current, High
POR Output Voltage, Low
POR Start-Up Voltage
IN
Dual, 180° Out-of-Phase, 1.4MHz, 750mA Step-
= V
PARAMETER
CC
= V
EN
= 5V, V
D
_______________________________________________________________________________________
)
Down Regulator with POR and RSI/PFO
FB1
= V
Measured from FB1 to
GND
Measured from FB2 to
GND
FB1 or FB2, FBSEL_ = unconnected, V
FB1 = COMP1,
V
FB2 = COMP2,
V
I
I
Duty cycle = 100%,
V
V
V
V
Percentage of V
V
MAX1970
MAX1971/MAX1972
V
V
I
FB1 = FB2 = GND, I
LX
LX
POR
COMP1
COMP2
IN
IN
IN
IN
IN
FB1
POR
FB2
= -180mA
= 180mA
= 2.6V to 5.5V
= 5.5V
= 2.6V to 5.5V
= 2.6V to 5.5V
= 2.6V to 5.5V
= 1.05V or V
= 1mA
= V
= 1.15V, R
= 1.2V
= 1.2V
IN
= 5.5V, V
OUT
FB2
POR
A
,
POR
FB1
= -40°C to +85°C.) (Note 2)
= 1.05V or RSI = IN (MAX1971 only),
CONDITIONS
= 100kΩ to IN, R
= 100µA, V
= V
FBSEL1 = GND
FBSEL1 = V
FBSEL2 = GND
FBSEL2 = V
FBSEL1 = unconnected
FBSEL2 = unconnected
V
V
V
V
High side
Low side
V
V
MAX1970/MAX1972
MAX1971
MAX1970/MAX1972
MAX1971
V
V
IN
IN
IN
IN
LX1
LX1
OUT
OUT
FB2
= 5.0V
= 3.3V
= 5.0V
= 3.3V
= V
= V
= 1.15V
rising
falling
LX2
LX2
IN
= 1.2V
FB1
CC
CC
= 5.5V
= 0
PFO
= V
= 100kΩ to IN, RSI = 0, C
FB2
= 1.15V
MIN
22.5
22.5
0.76
0.60
13.3
-1.6
140
-20
0.4
1.2
30
30
35
35
87
-1
VCC
TYP
= 0.1µF, C
MAX
-0.40
0.32
0.37
0.23
0.25
1.60
0.80
0.05
0.05
120
120
210
0.1
0.6
1.6
90
90
85
85
20
20
15
94
20
1
REF
= 0.1µF,
UNITS
MHz
V/A
kΩ
kΩ
µA
µA
ms
µA
µS
µS
%
%
Ω
Ω
A
V
V
5