MAX1956ETI Maxim Integrated Products, MAX1956ETI Datasheet - Page 2

• Manufacturer Part Number: MAX1956ETI
• Description: DC/DC Switching Controllers
• Manufacturer: Maxim Integrated Products

Specifications of MAX1956ETI

• Number Of Outputs: 2
• Output Voltage: 0.8 V to 4.95 V
• Input Voltage: 1.6 V to 5.5 V
• Package / Case: TQFN EP-28
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

ABSOLUTE MAXIMUM RATINGS
IN, AVDD, SYNC, EN, ILIM_, FB_, SEQ to GND.......-0.3V to +6V
COMP_, REF to GND..............................-0.3V to (V
LXB to GND ..............................................-0.3V to (V
DL_ to GND ...............................(V
BST_ to GND ..........................................................-0.3V to +12V
DH1 to LX1 ...............................................-0.3V to (BST1 + 0.3V)
DH2 to LX2 ...............................................-0.3V to (BST2 + 0.3V)
LX1 to BST1..............................................................-6V to +0.3V
LX2 to BST2..............................................................-6V to +0.3V
ELECTRICAL CHARACTERISTICS
(V
wise noted. Typical values are at T
1.6V to 5.5V Input, 0.5% Accurate, Dual
180° Out-of-Phase Step-Down Controllers
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
2
IN Input Voltage Range
IN Input Voltage UVLO
FB Regulation Voltage
FB Regulation Voltage with
Positive Voltage Margining
FB Regulation Voltage with
Negative Voltage Margining
Line Regulation Error
Feedback Input Bias
Feedback Transconductance
COMP Source Current
COMP Sink Current
COMP Pulldown Resistance
Output Soft-Start Time
Step-Down Switching Frequency
SYNC Frequency Range
Maximum Duty Cycle
Minimum Duty Cycle
IN
_______________________________________________________________________________________
= V
EN
PARAMETER
= 3.3V; V
VDD
= V
AVDD
PGND
A
= 5V; V
= +25°C.)
MAX1955
MAX1956 (Note 1)
Rise or fall
Percentage change from nominal regulation voltage
Percentage change from nominal regulation voltage
Note 2
In shutdown
SYNC = GND (Note 3)
2 times step-down switching frequency
Measured at DH_
Measured at DH_
- 0.3V) to (V
PGND
= V
AVDD
VDD
VDD
GND
MAX1955, hysteresis = 35mV
MAX1956, hysteresis = 30mV
+ 0.3V)
+ 0.3V)
+ 0.3V)
= 0; C
CONDITIONS
REF
= 0.22µF; SEQ = SYNC = GND; T
PGND to GND or VDD to AVDD ............................-0.3V to +0.3V
REF Short-Circuit to GND...........................................Continuous
I
Continuous Power Dissipation* (T
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering 10s) ..................................+300°C
*Exposed pad soldered to PC board.
VDD
28-Lead Thin QFN
(derate 20.8mW/°C above +70°C)................................1667mW
...................................................................................250mA
0.796
1080
2.25
1.30
MIN
-0.2
100
100
540
1.6
1.9
90
-5
3
1
A
A
= +70°C)
= 0°C to +85°C, unless other-
TYP
4.27
150
150
600
0.8
0.1
93
-4
4
2
7
0.804
MAX
1320
+0.2
5.50
1.58
100
660
5.5
2.2
0.3
97
10
-3
5
3
UNITS
kHz
kHz
mS
ms
µA
µA
µA
%
%
%
%
%
Ω
V
V
V