PRODUCT DATASHEET
AAT2610
7-Channel PMU for Digital Still Cameras
Pin Descriptions
Number
22
Symbol
SCF
Description
Open drain, active low, short circuit
fl
ag output. SCF goes open when overload protection or AUX_L1 open
circuit occur during abnormal operation or during startup. SCF can drive P-channel MOSFETs to disconnect
a given output from the load.
Step-up (SU) boost converter feedback pin. This pin is high impedance when the SU controller is disabled.
Connect an external resistor divider between this pin and SU output and GND to set the SU output voltage
with 0.6V.
Step-up (SU) boost converter input.
Step-up (SU) boost converter switching node. Connect this pin to the external inductor and anode of the
Schottky rectifying diode. This pin is high impedance when the SU converter is disabled.
Step-up (SU) boost converter power ground. Tie this pin to ground plane.
Step-down 2 (SD2) buck converter power ground pin. Tie this pin to ground plane.
Step-down 2 (SD2) buck converter switching node. Connect this pin to an external inductor. This pin is
high impedance when the SD2 converter is disabled.
Step-down 2 (SD2) buck converter input pin. Bypass this pin to GND plane with a 1μF ceramic capacitor.
Step-down 2 (SD2) buck converter feedback pin. This pin is high impedance when the SD2 controller is
disabled. Connect an external resistor divider between this pin and SD2 output and GND to set the SD2
output voltage with 0.6V.
Auxiliary 3 (AUX_L3) buck/boost (inverting) reference voltage pin. Bypass VREF3 to GND with a 1μF or
greater capacitor. Connect an external resistor divider between this pin and L3 output and FBL with 0.6V.
Auxiliary 3 (AUX_L3) boost converter feedback pin. The pin is high impedance when the AUX_L3 control-
ler is disabled. Connect an external resistor divider between this pin and AUX_L3 output and VREF3 pin to
set the AUX_L3 negative buck/boost (inverting) output voltage with 0V.
Auxiliary 3 (AUX_L3) buck/boost (inverting) input node. Connect this pin to the input ceramic capacitor.
Auxiliary 3 (AUX_L3) buck/boost (inverting) switching node. Connect this pin to the cathode of the exter-
nal Schottky diode and buck/boost inductor.
Power input for auxiliary (AUX_L1, AUX_L2, AUX_L3) channels’ power FET driver. Tie this pin to PVSU.
Auxiliary 2 (AUX_L2) boost (step-up) switching node. Connect this pin to the anode of the external
Schottky diode and boost inductor.
Power ground for auxiliary (AUX_L1, AUX_L2, AUX_L3) channels’ power FET driver. Tie this pin to ground
plane.
Auxiliary 1 (AUX_L1) boost (step-up) switching node. Connect this pin to the anode of the external
Schottky diode and boost inductor.
Auxiliary 1 (AUX_L1) boost converter current sink pin. The pin is high impedance when the AUX_L1 con-
troller is disabled. Connect this pin to the cathode of the bottom LED in the string to ensure DC current
fl
ow. Current level is programmed by the internal RSET resistor from 1 to 20mA.
Auxiliary 1 (AUX_L1) boost (step-up) over-voltage protection pin. Connect an external resistor divider be-
tween this pin and AUX_L1 output voltage and GND to set the AUX_L1 over-voltage threshold with 0.6V.
Exposed pad (bottom). Connect to ground directly beneath the package for thermal dissipation.
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
EP
FBSU
PVSU
LXSU
PGSU
PGSD2
LXSD2
PVSD2
FBSD2
VREF3
FBL3
PVL3
LXL3
PVL
LXL2
PGL
LXL1
CSL1
OVL1
2610.2008.11.1.1
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