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Linear Technology Electronic Components Datasheet

LTC1706C-19 Datasheet

VID Voltage Programmer

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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
CSS
0.1µF
COSC
47pF
1
COSC
2
RUN/SS
3
ITH
13
VIN
16
TG
CC2
220pF
CC
1000pF
RC
10k
LTC1435A
14
SW
5
SGND
12
INTVCC
50pF
6
VOSENSE
15
BOOST
+
11
BG
SENSE
7
10
PGND
SENSE+
8
RF
4.7
CF
0.1µF
VIN
4.5V TO 22V
+
M1
Si4410
CIN
10µF
30V
X2
L1
3.3µH
RSENSE
0.015
*DB
0.22µF
4.7µF
M2
Si4410
D1
MBRS140T3
*CMDSH-3
1000pF
SENSE
VCC
VOUT
1.3V TO 2V
7A
FB LTC1706-19
+
COUT
820µF
4V
X2
VID
0123
GND
FROM µP
1706-19 TA01
1


Linear Technology Electronic Components Datasheet

LTC1706C-19 Datasheet

VID Voltage Programmer

No Preview Available !

LTC1706-19
ABSOLUTE AXI U RATI GS
(Note 1)
(Voltages Referred to GND Pin)
Input Supply Voltage (VCC) ..........................– 0.3V to 7V
VID Input Pins .............................................– 0.3V to 7V
SENSE Pin ...................................................– 0.3V to 7V
FB Pin ..........................................................– 0.3V to 7V
Operating Temperature Range
LTC1706C-19 .......................................... 0°C to 70°C
LTC1706I-19 ...................................... – 40°C to 85°C
Junction Temperature ........................................... 110°C
Storage Temperature Range ................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
VID2 1
VID3 2
VCC 3
GND 4
8 VID1
7 VID0
6 SENSE
5 FB
S8 PACKAGE
8-LEAD PLASTIC SO
TJMAX = 110°C, θJA = 120°C/W
Consult factory for Military grade parts.
ORDER PART
NUMBER
LTC1706CS8-19
LTC1706IS8-19
S8 PART
MARKING
170619
706I19
ELECTRICAL CHARACTERISTICS
TA = 25°C, 2.7V VCC 5.5V, VID0 = VID1 = VID2 = VID3 = N. C., unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
VCC
IVCC
RFB-SENSE
VOUT Error %
RPULLUP
VIDT
Operating Supply Voltage Range
Supply Current
Resistance Between SENSE and FB
Output Voltage Accuracy
VID Input Pull-Up Resistance
VID Input Voltage Threshold
IVID-LEAK
VPULLUP
VID Input Leakage Current
VID Pull-Up Voltage
(Note 2)
Programmed From 1.3V to 2V
VDIODE = 0.6V, VCC = 5V, (Note 3)
VIL (2.7V VCC 5.5V)
VIH (2.7V VCC 5.5V)
VCC < VID < 7V, (Note 3)
VCC = 3.3V
VCC = 5V
2.7
q8
q – 0.25
0.1
15
40
1.6
0.01
2.8
4.5
5.5
5
20
0.25
0.4
±1
V
µA
k
%
k
V
V
µA
V
V
The q denotes specifications which apply over the full specified
temperature range.
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: With all four VID inputs floating, the VCC supply current is simply
the device leakage current. However, the VCC supply current will rise and
be approximately equal to the number of grounded VID input pins times
(VCC – 0.6V)/40k. (See the Typical Applications section for more detail.)
Note 3: Each built-in pull-up resistor attached to the VID inputs also has a
series diode connected to VCC to allow input voltages higher than the VCC
supply without damage or clamping. (See Operation section for further
detail.)
2


Part Number LTC1706C-19
Description VID Voltage Programmer
Maker Linear Technology
Total Page 8 Pages
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