S
INGLE
-C
HIP
P
ROGRAMMABLE
PWM C
ONTROLLERS
WITH
5-B
IT
DAC
LX1662/62A, LX1663/63A
PRODUCT DATABOOK 1996/1997
Copyright © 1999
Rev. 1.2a, 11/04
4
P
RODUCTION DATA SHEET
ELECTRICAL CHARACTERISTICS
Table 1 - Adaptive Transient Voltage Output (Output Voltage Setpoint Typical)
0A
5A/Div.
Time - 100µs/Div.
2.8V
100mV/Div.
Output Load
0 to 14A
Output Voltage
FIGURE 1 — Output Transient Response
(Using 5mΩ sense resistor and 5µH output inductor)
Note:
Adaptive Transient Voltage Output
In order to improve transient response a
40mV offset is built into the Current Sense
comparator. At high currents, the peak
output voltage will be lower than the
nominal set point , as shown in Figure 1.
The actual output voltage will be a function
of the sense resistor, output current and
output ripple.
01111 1.34V 1.30V
01110 1.39V 1.35V
01101 1.44V 1.40V
01100 1.49V 1.45V
01011 1.54V 1.50V
01010 1.59V 1.55V
01001 1.64V 1.60V
01000 1.69V 1.65V
00111 1.74V 1.70V
00110 1.79V 1.75V
00101 1.84V 1.80V
00100 1.89V 1.85V
00011 1.94V 1.90V
00010 1.99V 1.95V
00001 2.04V 2.00V
00000 2.09V 2.05V
11111 2.04V 2.00V
11110 2.14V 2.10V
11101 2.24V 2.20V
11100 2.34V 2.30V
11011 2.44V 2.40V
11010 2.54V 2.50V
11001 2.64V 2.60V
11000 2.74V 2.70V
10111 2.84V 2.80V
10110 2.94V 2.90V
10101 3.04V 3.00V
10100 3.14V 3.10V
10011 3.24V 3.20V
10010 3.34V 3.30V
10001 3.44V 3.40V
10000 3.54V 3.50V
VID4 VID3 VID2 VID1 VID0
Processor Pins
Output Voltage (V
CC_CORE
)
0 = Ground, 1 = Open (Floating)
0.0A Nominal Output*
* Nominal = DAC setpoint voltage with no adaptive output voltage positioning.
