LTC1706-19_15 Datasheet, PDF (1/8 Pages) Linear Technology – VID Voltage Programmer

LTC1706-19
VID Voltage Programmer
FEATURES
s _{Programs Regulator Output Voltage from 1.3V to}
2V in 50mV Steps
s _{Programs an Entire Family of Linear Technology}
DC/DC Converters
s _{Fully Compliant with the Intel Mobile VID}
Specification
s _{±0.25% Accurate Output Voltage}
s _{Built-In 40k Pull-Up Resistors on VID Inputs}
s _{Available in SO-8 Packaging}
U
APPLICATIONS
s _{Intel Mobile Pentium}^® _{II Processor Power Supply}
s _{Notebook and Palmtop Computers, PDAs}
s _{Portable Instruments}
s _{Battery-Powered Equipment}
DESCRIPTIO
The LTC^®1706-19 is a precision, digitally programmed,
resistive ladder which adjusts the output of any 1.19V
referenced regulator. Depending on the state of the four
VID inputs, an output voltage between 1.3V and 2V is
programmed in 50mV increments.
The LTC1706-19 is designed specifically to program an
entire family of Linear Technology DC/DC converters in full
compliance with the Intel Mobile VID specification.
The LTC1706-19 programs the following Linear Technol-
ogy DC/DC converter products: LTC1433, LTC1434,
LTC1435, LTC1435A, LTC1436, LTC1437, LTC1438,
LTC1439, LTC1538-AUX, LTC1539, LTC1624 and
LTC1625. (Consult factory for future compatible DC/DC
converter products.)
, LTC and LT are registered trademarks of Linear Technology Corporation.
Pentium is a registered trademark of Intel Corporation.
TYPICAL APPLICATIO
Intel Mobile Pentium II Processor Power Supply
C_SS
0.1µF
C_OSC
47pF
1
C_OSC
2
RUN/SS
3
I_TH
13
V_IN
16
TG
C_C2
220pF
C_C
1000pF
R_C
10k
LTC1435A
14
SW
5
SGND
12
INTV_CC
50pF
6
V_OSENSE
15
BOOST
+
11
BG
SENSE^–
7
10
PGND
SENSE⁺
8
R_F
4.7Ω
C_F
0.1µF
V_IN
4.5V TO 22V
+
M1
Si4410
C_IN
10µF
30V
X2
L1
3.3µH
R_SENSE
0.015Ω
*D_B
0.22µF
4.7µF
M2
Si4410
D1
MBRS140T3
*CMDSH-3
1000pF
SENSE
V_CC
V_OUT
1.3V TO 2V
7A
FB _LTC1706-19
+
C_OUT
820µF
4V
X2
VID
0123
GND
FROM µP
1706-19 TA01
1