AIC1570 Datasheet, PDF (12/18 Pages) Analog Intergrations Corporation – 5-bit DAC, Synchronous PWM Power Regulator with LDO and Linear Controller

AIC1570
The OC trip point varies with MOSFET’s
temperature. To avoid over-current tripping in the
normal operating load range, determine the
R_OCSET resistor from the equation above with:
1. The maximum R_DS(ON) at the highest junction.
2. The minimum I_OCSET from the specification
table.
3. Determine I_PEAK > I_OUT(MAX) + (inductor ripple
current) /2.
PWM OUT1 Voltage Program
The output voltage of the PWM converter is
programmed to discrete levels between 1.3V to
3.5V. The VID pins program an internal voltage
reference (DACOUT) through a TTL compatible 5
bit digital to analog converter. The VID pins can
be left open for a logic 1 input, because they are
internally pulled up to 5V by a 70kΩ resistor.
Changing the VID inputs during operation is not
recommended. All VID pin combinations resulting
in an INHIBIT disable the IC and the open
collector at the PGOOD pin.
Shutdown
Holding the SS pin low with an open drain or
collector signal turns off all three regulators.
The VID codes resulting in an INHIBIT as shown
in Table 1 also shut down the IC.
Table 1 V_OUT1 Voltage Program (0=connected to GND, 1=open or connected to 5V)
For all package version
PIN NAME
DACOUT
PIN NAME
VID4 VID3 VID2 VID1 VID0 VOLTAGE VID4 VID3 VID2 VID1
0
1
1
1
1
1.30V
1
1
1
1
0
1
1
1
0
1.35V
1
1
1
1
0
1
1
0
1
1.40V
1
1
1
0
0
1
1
0
0
1.45V
1
1
1
0
0
1
0
1
1
1.50V
1
1
0
1
0
1
0
1
0
1.55V
1
1
0
1
0
1
0
0
1
1.60V
1
1
0
0
0
1
0
0
0
1.65V
1
1
0
0
0
0
1
1
1
1.70V
1
0
1
1
0
0
1
1
0
1.75V
1
0
1
1
0
0
1
0
1
1.80 V
1
0
1
0
0
0
1
0
0
1.85 V
1
0
1
0
0
0
0
1
1
1.90 V
1
0
0
1
0
0
0
1
0
1.95 V
1
0
0
1
0
0
0
0
1
2.00 V
1
0
0
0
0
0
0
0
0
2.05 V
1
0
0
0
VID0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
DACOUT
VOLTAGE
INHIBIT
2.1 V
2.2 V
2.3 V
2.4 V
2.5 V
2.6 V
2.7 V
2.8 V
2.9 V
3.0 V
3.1 V
3.2 V
3.3 V
3.4 V
3.5 V
12