LTC3562 Datasheet, PDF (15/20 Pages) Linear Technology – I2C Quad Synchronous Step-Down DC/DC Regulator 2 × 600mA, 2 × 400mA

LTC3562
OPERATION
Table 3. Regulator Operating Modes
A1
A0
REGULATOR MODE
0
0
Pulse Skip Mode
0
1
LDO Mode
1
0
Forced Burst Mode Operation
1
1
Burst Mode Operation
Table 4. Type-A Regulator Servo Voltage Programming
B3 B2 B1 B0
TYPE-A REGULATOR
SERVO (FEEDBACK) VOLTAGE
0
0
0
0
0.425
0
0
0
1
0.450
0
0
1
0
0.475
0
0
1
1
0.500
0
1
0
0
0.525
0
1
0
1
0.550
0
1
1
0
0.575
0
1
1
1
0.600
1
0
0
0
0.625
1
0
0
1
0.650
1
0
1
0
0.675
1
0
1
1
0.700
1
1
0
0
0.725
1
1
0
1
0.750
1
1
1
0
0.775
1
1
1
1
0.800
POR600A Pin
The POR600A pin is an open-drain output used to indicate
that regulator R600A has been enabled and has reached
its final voltage. POR600A remains low impedance until
regulator R600A reaches 92% of its regulation value. A
230ms delay is included to allow a system microcontroller
ample time to reset itself. POR600A may be used as a
power on reset to the microprocessor powered by regula-
tor R600A or may be used to enable regulator R400A for
supply sequencing. POR600A is an open drain output and
requires a pull-up resistor to the output voltage of regulator
R600A or another appropriate power source.
Table 5. Type-B Regulator Base Output Voltage Programming
B6 B5 B4 B3 B2
TYPE-B REGULATOR
BASE OUTPUT VOLTAGE
0
0
0
0
0
0.600
0
0
0
0
1
0.700
0
0
0
1
0
0.800
0
0
0
1
1
0.900
0
0
1
0
0
1.000
0
0
1
0
1
1.100
0
0
1
1
0
1.200
0
0
1
1
1
1.300
0
1
0
0
0
1.400
0
1
0
0
1
1.500
0
1
0
1
0
1.600
0
1
0
1
1
1.700
0
1
1
0
0
1.800
0
1
1
0
1
1.900
0
1
1
1
0
2.000
0
1
1
1
1
2.100
1
0
0
0
0
2.200
1
0
0
0
1
2.300
1
0
0
1
0
2.400
1
0
0
1
1
2.500
1
0
1
0
0
2.600
1
0
1
0
1
2.700
1
0
1
1
0
2.800
1
0
1
1
1
2.900
1
1
0
0
0
3.000
1
1
0
0
1
3.100
1
1
0
1
0
3.200
1
1
0
1
1
3.300
1
1
1
0
0
3.400
1
1
1
0
1
3.500
1
1
1
1
0
3.600
1
1
1
1
1
3.700
Table 6. Type-B Regulator Incremental Output Voltage Programming
B1
B0 TYPE-B REGULATOR INCREMENTAL OUTPUT VOLTAGE
0
0
+0.000
0
1
+0.025
1
0
+0.050
1
1
+0.075
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