sccsp900842/r2 Freescale Semiconductor, Inc, sccsp900842/r2 Datasheet - Page 10

• Manufacturer Part Number: sccsp900842/r2
• Description: Sc900842, Buck-boost Dc-dc And Ldo Power Management Ic
• Manufacturer: Freescale Semiconductor, Inc

POWER SUPPLY INPUT VOLTAGE (PVIN1)
converter. Input decoupling/filtering is required for proper
operation.
POWER GROUND (PGND)
OUTPUT VOLTAGE (VOUTP)
SWITCHING NODE 1 (VSW1P)
operates in Buck mode. The inductor is connected between
this pin and the VSW2P pin.
SWITCHING NODE 2 (VSW2P)
operates in Boost mode. The inductor is connected between
this pin and the VSW1P pin.
SWITCHING NODE 1 FEEDBACK (VSW1FB)
be directly connected to the inductor terminal.
SWITCHING NODE 2 FEEDBACK (VSW2FB)
be directly connected to the inductor terminal.
OUTPUT VOLTAGE POSITIVE FEEDBACK
(VOUTPFB)
output capacitor.
OUTPUT VOLTAGE NEGATIVE FEEDBACK
(VOUTMFB)
of the output capacitor.
10
900842
FUNCTIONAL DESCRIPTION
FUNCTIONAL PIN DESCRIPTION
This is the input voltage for the Buck-Boost DC/DC
Power Ground connection.
This is the 3.3 V output node.
This output pin is the switching node when the device
This output pin is the switching node when the device
Feedback voltage from Switching Node 1. This pin must
Feedback voltage from Switching Node 2. This pin must
This input must be connected to the positive end of the
This input must be connected to the negative end (ground)
FUNCTIONAL PIN DESCRIPTION
ANALOG SUPPLY INPUT VOLTAGE (AVIN)
regulator.
ANALOG GROUND (AGND)
BOOST GATE DRIVE SUPPLY (PVIN2)
LDO REGULATED OUTPUT (VREGOUT)
REFERENCE BYPASS CAPACITOR (BGBYP)
pin and GND.
1.8 V SUPPLY INPUT VOLTAGE (VIN1P8)
26 MHz CLOCK INPUT (CLK26M)
ENABLE (EN)
Boost has started up in Normal Operation.
POWER GOOD STATUS SIGNAL (STTS)
of the output voltage. This signal will be high if the IC is under
thermal shutdown, IC is in current limit, or V
CURRENT SENSE SIGNAL (ISNS)
the average output current.
Supply voltage for the Buck-or-Boost Controller and LDO
Analog ground of the IC.
This pin is connected to the output pin, VOUTP.
2.775 V LDO regulated output voltage.
Connect a 0.1 μF decoupling filter capacitor between this
1.8 V supply for digital sub-circuits.
A 26 MHz clock input reference signal.
Active high enable input signal to turn on the 3.3 V output.
• EN = 1.8 V to enter Normal Operation Mode.
• EN = 1.2 V to enter Low Power Mode.
The Low Power Mode can only be entered after the Buck-
This is an active low output signal that indicates the status
This output pin provides an analog voltage proportional to
Analog Integrated Circuit Device Data
Freescale Semiconductor
OUTP
is too low.