MAX1956ETI Maxim Integrated Products, MAX1956ETI Datasheet - Page 4

• 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

1.6V to 5.5V Input, 0.5% Accurate, Dual
180° Out-of-Phase Step-Down Controllers
ELECTRICAL CHARACTERISTICS
(V
noted.) (Note 5)
4
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
FB_ Input Bias
Feedback Transconductance
COMP_ Source Current
COMP_ Sink Current
COMP_ Pulldown Resistance
Step-Down Switching Frequency
SYNC Frequency Range
Maximum Duty Cycle
Minimum Duty Cycle
V
IN Quiescent Supply Current
IN Shutdown Supply Current
REF Voltage
REF Load Regulation
Default Current-Limit Threshold
Adjustable Current-Limit
Threshold
IN
DD
_______________________________________________________________________________________
= V
Quiescent Supply Current
EN
PARAMETER
= 3.3V; V
VDD
= V
AVDD
= 5V; PGND = GND = 0; 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_
Total of VDD1 + VDD2 + AVDD current, SYNC = GND,
no load on DH_ or DL_
I
ILIM_ = V
Measured from PGND to LX_
REF
= -50µA to +50µA
DD
; measured from PGND to LX_
CONDITIONS
REF
= 0.22µF; SYNC = GND; T
MAX1955
MAX1956
R
R
ILIM_
ILIM_
= 100kΩ
= 400kΩ
A
0.794
1.267
127.5
1080
= -40°C to +85°C, unless otherwise
2.25
1.30
MIN
-0.2
100
100
540
240
1.6
1.9
1.0
+3
90
60
-5
TYP
0.806
1.293
172.5
MAX
1320
+0.2
5.50
1.58
0.01
100
660
100
360
5.5
2.2
0.3
3.1
+5
97
10
32
20
90
-3
UNITS
kHz
kHz
mS
mA
mV
mV
µA
µA
µA
µA
µA
%
%
%
%
%
Ω
V
V
V
V
V