PRODUCT DATASHEET
AAT2610
7-Channel PMU for Digital Still Cameras
Pin Descriptions
Number
1
Symbol
FBL2
Description
Auxiliary 2 (AUX_L2) boost converter feedback pin. This pin is high impedance when the AUX2 controller
is disabled. Connect an external resistor divider between this pin and AUX2 output and GND to set the
AUX2 output voltage with 0.6V.
Step-down 1 (SD1) buck converter feedback pin. This pin is high impedance when the SD1 controller is
disabled. Connect an external resistor divider between this pin and SD1 output and GND to set the SD1
output voltage with 0.6V.
Step-down 1 (SD1) buck converter input pin. Bypass to GND plane with a 1μF ceramic capacitor.
Step-down 1 (SD1) buck converter switching node. Connect this pin to an external inductor. This pin is
high impedance when the SD1 converter is disabled.
Step-down 1 (SD1) buck converter power ground. Tie this pin to ground plane.
Main (SUD) converter power ground. Tie this pin to ground plane.
If is SUSD pulled high, the Main is a boost (step-up) converter and the pin functions as the Main converter
switching node. In this case, connect this pin to the external inductor.
If SUSD is pulled low, the Main is a buck (step-down) converter and the pin functions as the Main converter
switching node. In this case, connect this pin to the external inductor.
In either case, LXM is high impedance when the Main converter is disabled.
If SUSD is pulled high, the Main is a boost (step-up) converter and this pin functions as the Main converter
output. In this case, connect a ceramic capacitor to GND plane from this pin.
If SUSD is pulled low, the Main is a buck (step-down) converter and this pin functions as the Main converter
input voltage. In this case, connect this pin to the external inductor.
Main (M) buck or boost converter feedback pin. This pin is high impedance when the Main controller is
disabled. Connect an external resistor divider between this pin and Main output and GND to set the Main
output voltage with 0.6V.
Main (M) converter open-drain output sequencing pin. This pin is internally pulled low after both SD1 and
SD2 converters completed soft-start and achieved output regulation. This pin can provide gate drive to
external P-channel MOSFETs which disconnect the load during start-up. This pin is open-circuit during
shut-down, overload or during OT trip conditions.
Main converter configuration pin. Tie this pin to high to configure the Main output as a boost (step-up)
converter, or tie this pin to low to configure the Main output as a buck (step-down) converter. This pin
cannot be toggled during operation.
Auxiliary 3 (AUX_L3) buck-boost (inverting) converter active high enable pin. The AUX_L3 output remains
disabled until 2,048 clock cycles after Step-Up (SU) output has reached regulation. The pin has an inter-
nal 330kΩ pull-down resistor.
Auxiliary 2 (AUX_L2) boost converter active high enable pin. The AUX_L2 output remains disabled until
2,048 clock cycles after Step-Up (SU) output has reached regulation. The pin has an internal 330kΩ pull-
down resistor.
Auxiliary 1 (AUX_L1) boost converter active high enable pin. The Main output remains disabled until 2,048
clock cycles after Step-Up (SU) output has reached regulation. The pin has an internal 330kΩ pull-down
resistor. This pin also functions as PWM input for the LED dimming feature. The input PWM frequency is
logic level high and low within 1kHz to 30kHz frequency. PWM dimming input duty cycle (ON-time/TOTAL-
time) range is from 10% to 100%.
Input voltage. Tie this pin to the input of step-up (SU).
Chip ground. Tie this pin to ground plane.
Power input for the PMIC. Connect this pin directly to the PVSU pin.
Step-down 2 (SD2) buck converter active high enable pin. The SD2 output remains disabled until 2,048
clock cycles after Step-Up (SU) output has reached regulation. This pin has an internal 330kΩ pull-down
resistor.
Step-down 1 (SD1) buck converter active high enable pin. The SD1 output remains disabled until 2,048
clock cycles after Step-Up (SU) output has reached regulation. This pin has an internal 330kΩ pull-down
resistor.
Main buck or boost converter active high enable pin. However, the Main output remains disabled until
2,048 clock cycles after Step-Up (SU) output has reached regulation. This pin has an internal 330kΩ pull-
down resistor.
Step-up (SU) boost converter active high enable pin. This pin has an internal 330kΩ pull-down resistor.
2
3
4
5
6
FBSD1
PVSD1
LXSD1
PGSD1
PGM
7
LXM
8
PVM
9
FBM
10
SEQ
11
SUSD
12
ENL3
13
ENL2
14
ENL1
15
16
17
18
VIN
GND
PV
ENSD2
19
ENSD1
20
21
ENM
ENSU
4
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2610.2008.11.1.1
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