33702 Datasheet, PDF (4/24 Pages) Motorola, Inc – 3.0 A Switch-Mode Power Supply with Linear Regulator

Freescale Semiconductor, Inc.
PIN FUNCTION DESCRIPTION (continued)
Pin
Pin Name
Formal Name
23
V_DDI
Power Supply
26
ADDR
Address
27
EN1
28
EN2
29
RT
30
RESET
Enable 1
Enable 2
Reset Timer
Reset Overbar
31
CLKSEL
Clock Selection
32
CLKSYN
Clock Synchronization
Internal supply voltage.
Definition
I²C address selection. This pin can be either left open, tied to V_DDI, or grounded through
a 10 kΩ resistor.
Enable 1 Input. The combination of the logic state of the Enable 1 and Enable 2 inputs
determine operation mode and type of power sequencing of the IC.
Enable 2 Input. The combination of the logic state of the Enable 1 and Enable 2 inputs
determine operation mode and type of power sequencing of the IC.
This pin allows programming the Power-ON Reset delay by means of an external RC
network.
The Reset Control circuit monitors both the switching regulator and the LDO feedback
voltages. It is an open drain output and has to be pulled up to some supply voltage (e.g.,
the output of the LDO) by an external resistor.
This pin sets the CLKSYN pin either as an oscillator output or synchronization input pin.
The CLKSEL pin is also used for the I²C address selection.
Oscillator output/synchronization input pin.
33702
4
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