LTC1705_15 Datasheet, PDF (10/28 Pages) Linear Technology – Dual 550kHz Synchronous Switching Regulator Controller with 5-Bit VID and 150mA LDO

LTC1705
TEST CIRCUIT
f_OSCC
2000pF
Test Circuit 1
I_BOOSTC
2000pF _2k
V_FBC
RUN/SS
5V
I_VCC
I_PVCC
I_VINCLK
+ _IBOOSTIO
V_CC
BOOSTC
TGC
BGC
I_MAXC
COMPC
FBC
SENSEC
VIDO:4
RUN/SS
PV_CC
LTC1705
V_INCLK
BOOSTIO
TGIO
BGIO
I_MAXIO
COMPIO
FBIO
PGOOD
V_OUTCLK
SWC PGND GND SWIO
2k
1000pF
V_FBIO
V_OUTCLK
+
10µF
100µF
0.1µF
f_OSCIO
1000pF
1705 TC
VID PROGRA I G CODES
Table 1. VID Inputs and Corresponding Core Output Voltages
CODE
00000
VID4 VID3 VID2
Gnd Gnd Gnd
VID1 VID0 V_OUTC
Gnd Gnd 2.00V
00001
Gnd
Gnd Gnd
Gnd Float 1.95V
00010 Gnd Gnd Gnd Float Gnd 1.90V
00011 Gnd Gnd Gnd Float Float 1.85V
00100 Gnd Gnd Float Gnd Gnd 1.80V
00101 Gnd Gnd Float Gnd Float 1.75V
00110 Gnd Gnd Float Float Gnd 1.70V
00111 Gnd Gnd Float Float Float 1.65V
01000 Gnd Float Gnd Gnd Gnd 1.60V
01001 Gnd Float Gnd Gnd Float 1.55V
01010 Gnd Float Gnd Float Gnd 1.50V
01011 Gnd Float Gnd Float Float 1.45V
01100 Gnd Float Float Gnd Gnd 1.40V
01101 Gnd Float Float Gnd Float 1.35V
01110 Gnd Float Float Float Gnd 1.30V
01111^* Gnd Float Float Float Float 1.25V
CODE
10000
VID4 VID3 VID2
Float Gnd Gnd
VID1 VID0 V_OUTC
Gnd Gnd 1.275V
10001 Float Gnd Gnd Gnd Float 1.250V
10010 Float Gnd Gnd Float Gnd 1.225V
10011 Float Gnd Gnd Float Float 1.200V
10100 Float Gnd Float Gnd Gnd 1.175V
10101 Float Gnd Float Gnd Float 1.150V
10110 Float Gnd Float Float Gnd 1.125V
10111 Float Gnd Float Float Float 1.100V
11000 Float Float Gnd Gnd Gnd 1.075V
11001 Float Float Gnd Gnd Float 1.050V
11010 Float Float Gnd Float Gnd 1.025V
11011 Float Float Gnd Float Float 1.000V
11100 Float Float Float Gnd Gnd 0.975V
11101 Float Float Float Gnd Float 0.950V
11110 Float Float Float Float Gnd 0.925V
11111^* Float Float Float Float Float 0.900V
*01111 and 11111 are defined by Intel to signify “no CPU.” The LTC1705
generates the output voltages shown if these codes are selected.
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