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RC5056
PRODUCT SPECIFICATION
6
P
The output voltage of a RC5056 converter is programmed to
discrete levels between 1.3VDC and 3.5VDC . The voltage
identification (VID) pins program an internal voltage refer-
ence (DACOUT) with a 5-bit digital-to-analog converter
(DAC). The level of DACOUT also sets the PGOOD and
OVP thresholds. Table 2 specifies the DACOUT voltage for
the 32 combinations of open or short connections on the VID
pins. The output voltage should not be adjusted while the
converter is delivering power. Remove input power before
changing the output voltage. Adjusting the output voltage
during operation could toggle the PGOOD signal and exer-
cise the overvoltage protection. The DAC function is a preci-
sion non-inverting summation amplifier shown in Figure 2.
The resistor values shown are only approximations of the
actual precision values used. Grounding any combination of
the VID pins increases the DACOUT voltage. The ‘open’
circuit voltage on the VID pins is the band gap reference
voltage, 1.26V.
Table 2. Output Voltage Table
Note:
1. 0 = connected to GND or V
SS
, 1 = OPEN
PIN NAME
VID2
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
NOMINAL
OUTPUT
VOLTAGE
1.30
1.35
1.40
1.45
1.50
1.55
1.60
1.65
1.70
1.75
1.80
1.85
1.90
1.95
2.00
2.05
PIN NAME
VID2
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
NOMINAL
OUTPUT
VOLTAGE
2.0
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
3.0
3.1
3.2
3.3
3.4
3.5
VID4
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
VID3
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
VID1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
VID0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
VID4
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
VID3
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
VID1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
VID0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0