SC2450
POWER MANAGEMENT
Pin Descriptions
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
Pin Name
FB1
COMP1
NC
BG
FB2
COMP2
REGDRV
ENABLE
PHASE2
DRVH2
BSTH2
DRVL2
BSTL2
VCC
BSTL1
DRVL1
BSTH1
DRVH1
PHASE1
PGND
OC+
OC-2
OC-1
EXTCLK
CLKOUT
NC
AGND
RREF
Pin Function
Feedback for channel 1.
Compensation for channel 1.
No connection.
1V reference for error amplifiers, 3K source impedance.
Feedback for channel 2.
Compensation for channel 2.
Regulator drive for external pass transistor.
Enable threshold is 2.05 V, connect to ground to disable.
Phase node input for channel 2.
Gate drive for high side channel 2.
Bootstrap input for high side channel 2.
Gate drive for low side channel 2.
Supply for low side channel 2.
Pre-regulated IC power supply.
Supply for low side channel 1.
Gate drive for low side channel 1.
Bootstrap input for high side channel 1.
Gate drive for high side channel 1.
Phase node input for high side channel 1.
Power ground.
Overcurrent comparator inverting input.
Overcurrent comparator non-inverting input for channel 2.
Overcurrent comparator non-inverting input for channel 1.
External clock, converter locks to this input when a valid signal is present.
Clock out, logic level drive to provide synchronizing signal for other converters.
No connection.
Analog ground.
External reference resistor for internal oscillator and ramp generator.
2007 Semtech Corp.
5
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SEMTECH [ SEMTECH CORPORATION ]
