Functional Diagram
Functional Diagram
Functional Diagram
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DRIVER CONTROL/STATE MACHINE
DRIVER CONTROL/STATE MACHINE
SWITCH-OVER
SWITCH-
OVER
IVALLEY/IZERO
I
VALLEY
/
I
ZERO
IPEAK
I
PEAK
DIGITAL
DIGITAL
REF
REF
Input Supply. Bypass to GND with effective capacitance equal to the minimum of 5µF and the value of the derating curve (Figure 7) for a bias voltage VIN placed as close to the device as possible.
IN
IN
Buck-Boost Output. If BBstFETScale = 0, bypass to GND with effective capacitance equal to twice the value of the derating curve (Figure 7) for a bias voltage VOUT, placed as close to the device as possible. If BBstFETScale = 1, bypass to GND with effective capacitance equal to the value of the derating curve (Figure 7) for a bias voltage VOUT, placed as close to the device as possible.
OUT
OUT
Switching Node. Connect to HVLX through a 1μH inductor if BBstFETScale = 0 or a 2.2μH inductor if BBstFETScale = 1.
LVLX
LVLX
Switching Node. Connect to LVLX through a 1μH inductor if BBstFETScale = 0 or a 2.2μH inductor if BBstFETScale = 1.
HVLX
HVLX
FAST***
FAST**
*
Ground
GND
GND
SCL*
SCL*
SDA*
SDA*
RSEL***
RSEL***
*VERSIONS WITH EnI2CMode = I2C CONTROL ONLY (SEE TABLE 3) **V...
*VERSIONS WITH EnI2CMode = I
2
C CONTROL ONLY
(
SEE TABLE
3
)
**
VERSIONS WITH EnI2CMode = EN CONTROL ONLY (
SEE TABLE
3
)
***
FastRSELMode SELECTS PIN FUNCTIONALITY (
SEE TABLE
3
)
EN**
EN**
INGOOD**
INGOOD*
*
PGOOD**
PGOOD*
*
INT*
INT
*
REF
REF
