AIC1569 AIC [Analog Intergrations Corporation], AIC1569 Datasheet - Page 6

• Manufacturer Part Number: AIC1569
• Description: 5-bit DAC, Synchronous PWM Power Regulator
• Manufacturer: AIC [Analog Intergrations Corporation]

PIN 5: VID1
PIN 6: VID2
PIN 7: VID3
PIN 8: VID4
PIN 9:COMP
PIN 10:FB
PIN 11:GND
PIN 12:PGOOD- Power
PIN 4: VID0
Table 1. Output Voltage Program
VID4
1
1
1
1
1
1
1
1
1
1
1
1
1
VID3
0
0
0
0
0
0
0
0
1
1
1
1
1
- 5-bit DAC voltage select pin. TTL
- External compensation pin. This
- The error amplifier inverting
- Signal GND. It also serves as
VID2
inputs used to set the internal
voltage reference VDAC. When
left
internally pulled up to 5V and
provide logic ones. The level of
VDAC sets the converter output
voltage as well as the PGOOD
and OVP thresholds.
Table 1 specifies the VDAC
voltage for the 32 combinations
of DAC inputs.
pin
amplifier
comparator. An RC network is
connected
compensate the voltage-control
feedback loop of the converter.
input pin. The FB pin and COMP
pin are used to compensate the
voltage-control feedback loop.
the power GND for the upper
gate driver.
PGOOD is an open drain output.
This pin is pulled low when the
converter output is ±10% out of
the VDAC reference voltage.
0
0
0
0
1
1
1
1
0
0
0
0
1
open,
is
VID1
0
0
1
1
0
0
1
1
0
0
1
1
0
good
connected
output
to
these
VID0 VDAC
0
1
0
1
0
1
0
1
0
1
0
1
0
indicator
FB
and
3.5V
3.4V
3.3V
3.2V
3.1V
3.0V
2.9V
2.8V
2.7V
2.6V
2.5V
2.4V
2.3V
pins
to
pin
PWM
error
pin.
are
to
PIN 13:PHASE - Over current detection pin. Connect
PIN 14: UGATE- External MOSFET gate drive pin.
PIN 15: BOOT - External
PIN 16:PGND - Driver power GND pin. PGND should
PIN 17:LGATE - Lower N-MOSFET gate driver pin.
PIN 18: VCC
PIN 19:OVP
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
- The chip power supply pin. It also
-Over voltage indicator pin. This pin
the PHASE pin to source of the
external MOSFET. This pin detects
the voltage drop across the MOSFET
R
Connect UGATE to gate of the
external MOSFET.
supply pin. To convert 5V main power
to V
MOSFET,
higher than 12V is recommended
since the negative power terminal of
the internal driver is internally tied to
GND.
be connected to a low impedance
ground plane close to lower N-
MOSFET source.
serves as power supply for LGATE
driver. Recommended supply voltage
is 12V.
also provides a driver source current
to turn on an external SCR in the
event of an over voltage condition.
DS(ON)
CORE
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
for over-current protection.
power by driving N-channel
MOSFET
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
supply voltage of no
AIC1569A
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
driver
2.05V
2.00V
1.95V
1.90V
1.85V
1.80V
1.75V
1.70V
1.65V
1.60V
1.55V
1.50V
1.45V
1.40V
1.35V
1.30V
2.2V
2.1V
2.0V
power
6