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LTC1706EMS-81#PBF [Linear]

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LTC1706EMS-81#PBF
型号： LTC1706EMS-81#PBF
厂家： Linear    Linear
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模拟IC 信号电路 光电二极管
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LTC1706-81  
5-Bit Desktop VID  
Voltage Programmer  
U
FEATURES  
DESCRIPTIO  
The LTC®1706-81 is a precision, digitally programmed,  
resistive ladder which adjusts the output of any 0.8V  
referenced regulator. Depending on the state of the five  
VID inputs, an output voltage between 1.3V and 3.5V is  
programmed in 50mV and 100mV increments.  
■
Programs Regulator Output Voltage Range from  
1.3V to 2.05V in 50mV Steps and from 2.1V to 3.5V  
in 100mV Steps (VRM 8.4)  
■
Programs a Wide Range of Linear Technology  
DC/DC Converters with a 0.8V Reference  
Fully Compliant with the Intel Pentium® Processor  
■
The LTC1706-81 is designed specifically to program  
an entire family of Linear Technology DC/DC converters in  
full compliance with the Intel Desktop (VRM 8.4) VID  
specification.  
Desktop VID Specification  
±0.25% Accurate Output Voltage  
Built-In 40k Pull-Up Resistors on VID Inputs  
■
■
■
Available in MSOUP-10 Package  
The LTC1706-81 programs the following Linear  
Technology DC/DC converter products: LTC1622,  
LTC1628, LTC1629, LTC1702, LTC1735, LTC1735-1,  
LTC1772 and LTC1929. (Consult factory for future com-  
patible DC/DC converter products.)  
APPLICATIO S  
■
Intel PentiumII and III Processor Power Supply  
AMD AthlonTM Processor Power Supply  
■
■
Workstations and Servers  
Large Memory Array Supply  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
Pentium is a registered trademark of Intel Corporation.  
AMD Athlon is a trademark of Advanced Micro Devices, Inc.  
■
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TYPICAL APPLICATION  
5-Bit VID-Controlled High Current 4-Phase Application (Simplified Block Diagram)  
V
IN  
4.5V TO 22V  
V
IN  
LTC1629  
TG1  
SW1  
L1  
L2  
R
R
V
SENSE1  
SENSE2  
OUT  
1.3V TO 3.5V  
UP TO 70A  
V
CC  
VID0  
VID1  
VID2  
VID3  
VID4  
+
INTV  
V
CC  
BG1  
C
OUT  
SENSE  
V
DIFFOUT  
SGND  
IN  
PGND  
FROM  
µP  
LTC1706-81  
TG2  
SW2  
BG2  
FB  
EAIN  
GND  
V
IN  
4.5V TO 22V  
V
IN  
LTC1629  
TG1  
SW1  
R
L3  
L4  
SENSE3  
BG1  
V
IN  
PGND  
SGND  
EAIN  
TG2  
SW2  
BG2  
R
SENSE4  
1706-81 TA01  
1
LTC1706-81  
W W  
U W  
U
W U  
ABSOLUTE MAXIMUM RATINGS  
PACKAGE/ORDER INFORMATION  
(Note 1)  
ORDER PART  
NUMBER  
(Voltages Referred to GND Pin)  
TOP VIEW  
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 (Note 2) .. –40°C to 85°C  
Junction Temperature........................................... 110°C  
Storage Temperature Range ................. –65°C to 150°C  
Lead Temperature (Soldering, 10 sec).................. 300°C  
VID0  
VID1  
VID2  
VID3  
1
2
3
4
5
10 FB  
9
8
7
6
GND  
LTC1706EMS-81  
NC  
VID4  
SENSE  
V
CC  
MS10  
PART MARKING  
MS10 PACKAGE  
10-LEAD PLASTIC MSOP  
TJMAX = 110°C, θJA = 120°C/ W  
LTLR  
Consult factory for Industrial and Military grade parts.  
ELECTRICAL CHARACTERISTICS  
The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are T = 25°C.  
A
2.7V ≤ VCC ≤ 5.5V, VID0 = VID1 = VID2 = VID3 = VID4 = NC unless otherwise specified.  
SYMBOL  
PARAMETER  
CONDITIONS  
MIN  
TYP MAX UNITS  
V
Operating Supply Voltage Range  
Supply Current  
Resistance Between SENSE and FB  
2.7  
5.5  
5
28  
V
µA  
kΩ  
CC  
I
(Note 3)  
0.1  
20  
VCC  
R
●
12  
FB-SENSE  
V
Error % Output Voltage Accuracy  
Programmed from 1.3V to 2.05V (VID4 = 0)  
Programmed from 2.1V to 3.5V (VID4 = 1)  
●
●
–0.25  
–0.35  
+ 0.25  
+ 0.25  
%
%
OUT  
R
VID  
VID Input Pull-Up Resistance  
VID Input Voltage Threshold  
V
V
V
= 0.6V (Note 4)  
DIODE  
40  
kΩ  
V
V
PULLUP  
(2.7V ≤ V ≤ 5.5V)  
0.4  
TH  
IL  
CC  
(2.7V ≤ V ≤ 5.5V)  
1.6  
IH  
CC  
I
V
VID Input Leakage Current  
VID Pull-Up Voltage  
V
V
V
< VID < 7V (Note 4)  
= 3.3V  
= 5V  
0.01  
2.8  
4.5  
±1  
µA  
V
V
VID-LEAK  
CC  
PULLUP  
CC  
CC  
Note 1: Absolute Maximum Ratings are those values beyond which the life  
of a device may be impaired.  
Note 3: With all five VID inputs floating, the V supply current is simply  
CC  
the device leakage current. However, the V supply current will rise and  
CC  
be approximately equal to the number of grounded VID input pins times  
Note 2: The LTC1706-81 is guaranteed to meet performance specifications  
from 0°C to 70°C. Specifications over the –40°C to 85°C operating  
temperature range are assured by design, characterization and correlation  
with statistical process controls.  
(V – 0.6V)/40k. (See the VID Input Characteristics section for more  
CC  
details.)  
Note 4: Each built-in pull-up resistor attached to the VID inputs also has a  
series diode connected to V to allow input voltages higher than the V  
CC  
CC  
supply without damage or clamping. (See Operation section for further  
details.)  
2
LTC1706-81  
W
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TYPICAL PERFORMANCE CHARACTERISTICS  
Typical Error % vs Output Voltage  
Typical Error % vs Temperature  
0.25  
0.25  
T
= 25°C  
A
V
OUT  
= 1.3V  
V
OUT  
= 1.7V  
0
0
V
OUT  
= 2V  
VID4 = 0  
VID4 = 1  
V
= 3.5V  
OUT  
–0.25  
–0.25  
1.3 1.5 1.7 1.9 2.1 2.3 2.5 2.7 2.9 3.1 3.3 3.5  
OUTPUT VOLTAGE (V)  
–50  
0
50  
100  
TEMPERATURE (°C)  
1706-81 G01  
1706-81 G02  
RFB1 vs Temperature  
IVID-PULLUP vs Temperature  
30  
20  
10  
0
120  
100  
80  
60  
40  
20  
0
V
= 5V  
CC  
VID4 = 0V  
VID0 = VID1 = VID2 = VID3 = OPEN  
–50  
0
50  
100  
–50  
0
50  
100  
TEMPERATURE (°C)  
TEMPERATURE (°C)  
1706-81 G03  
1706-81 G04  
Supply Current vs Temperature  
Supply Current vs Supply Voltage  
5
4
3
2
1
0
2.0  
1.5  
1.0  
0.5  
0
ALL VID INPUTS OPEN  
ALL VID INPUTS OPEN  
T
A
= 25°C  
V
CC  
= 5V  
V
CC  
= 3.3V  
V
CC  
= 2.7V  
0
2
4
6
8
–50  
0
50  
100  
SUPPLY VOLTAGE (V)  
TEMPERATURE (°C)  
1706-81 G06  
1706-81 G05  
3
LTC1706-81  
U
U
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PIN FUNCTIONS  
VID0 (Pin 1): LSB Programming Input. Low = GND,  
High = VCC or Float. Grounding VID0 adds 50mV  
(VID4 = LOW) or 100mV (VID4 = HIGH) to the output  
sense voltage.  
VCC (Pin 5): Power Supply Voltage. Range from 2.7V to  
5.5V.  
SENSE (Pin 6): Regulator Output Voltage. Connect  
directly to regulator output sense node or, when used with  
VID1 (Pin 2): 3rd MSB Programming Input. Low = GND,  
High = VCC or Float. Grounding VID1 adds 100mV  
(VID4 = LOW) or 200mV (VID4 = HIGH) to the output  
sense voltage.  
the LTC1629 and LTC1929 to VDIFFOUT.  
VID4 (Pin 7): High-Low Output Range Programming  
Input. VID4 = Low puts the output voltage in the lower  
range of 1.3V to 2.05V in 50mV steps. VID4 = HIGH puts  
the output voltage in the upper range of 2.1V to 3.5V in  
100mV steps.  
VID2 (Pin 3): 2nd MSB Programming Input. Low = GND,  
High = VCC or Float. Grounding VID2 adds 200mV  
(VID4 = LOW) or 400mV (VID4 = HIGH) to the output  
sense voltage.  
NC (Pin 8): No Connect.  
GND (Pin 9): Ground. Connect to regulator signal ground.  
VID3 (Pin 4): MSB Programming Input. Low = GND,  
High = VCC or Float. Grounding VID3 adds 400mV  
(VID4 = LOW) or 800mV (VID4 = HIGH) to the output  
sense voltage.  
FB(Pin10):FeedbackInput. Connecttothe0.8Vfeedback  
pin of a compatible regulator or the EAIN pin of the  
LTC1629 and LTC1929.  
NOMINAL (V)  
TYP  
ABSOLUTE MAX (V)  
PIN  
1
NAME  
VID0  
VID1  
VID2  
VID3  
DESCRIPTION  
MIN  
0
MAX  
MIN  
–0.3  
–0.3  
–0.3  
–0.3  
–0.3  
–0.3  
–0.3  
MAX  
LSB Programmable Input  
3rd MSB Programmable Input  
2nd MSB Programmable Input  
1st MSB Programmable Input  
Power Supply  
V
V
V
V
7
7
7
7
7
7
7
CC  
CC  
CC  
CC  
2
0
3
0
4
0
5
V
CC  
2.7  
1.3  
0
5.5  
3.5  
6
SENSE  
VID4  
NC  
Regulator Output Voltage  
Output Range Programmable Input  
7
V
CC  
8
9
GND  
FB  
Ground  
0
–0.3  
–0.3  
7
7
10  
0.8V Feedback Input  
0
0.8  
1.5  
4
LTC1706-81  
W
BLOCK DIAGRA  
V
V
V
V
CC  
CC  
CC  
CC  
40k  
40k  
40k  
40k  
VID0  
VID1  
VID2  
VID3  
1
2
3
V
CC  
5
6
10  
9
SENSE  
FB  
R
R
FB1  
FB2  
SWITCH  
CONTROL  
LOGIC  
GND  
1706-81 BD  
V
CC  
40k  
VID4  
4
7
U
OPERATIO  
The LTC1706-81 is a precision resistive divider designed  
specifically for use with an entire family of Linear  
Technology Corporation DC/DC switching regulators with  
0.8V internal reference and feedback voltage. The  
LTC1706-81 produces an output voltage ranging from  
1.3V to 2.05V in 50mV steps and from 2.1V to 3.5V in  
100mV steps by closing the loop between the output  
voltage sense and the feedback input of the regulator with  
the appropriate resistive divider network.  
VID Programming  
A list of programmed inputs and their corresponding  
output voltages is shown in Table 1. Programming is  
accomplished by applying the proper voltage (or float  
condition) on the five digital VID inputs. VID4 is the range  
bit that puts the output voltage in either the 1.3V to 2.05V  
rangeorthe2.1Vto3.5Vrange. Ineitherrange, VID3isthe  
mostsignificantbit(MSB)andVID0istheleastsignificant  
bit (LSB).  
The “top” feedback resistor, RFB1, connected between  
SENSE and FB, is typically 20k and is not modified by the  
state of the VID program inputs.  
In the lower range (VID4 = 0), when the four VID inputs are  
low or grounded, the regulator output voltage is set to  
2.05V. Each increasing binary count is equivalent to a  
decrease of 50mV in the output voltage. Therefore, to  
obtain a 1.3V output, the four VID inputs should be  
floating, or high.  
The “bottom” feedback resistor, RFB2, however, is modi-  
fied by the five VID inputs and is precisely ratioed to RFB1  
.
5
LTC1706-81  
U
OPERATIO  
Table 1. VID Inputs and Corresponding Output Voltage  
To program output voltages higher than 2.05V, the range  
bit should be set high (VID4 = High). In this range, when  
the four VID inputs are low, the output is 3.5V. Each  
increasing binary count is equivalent to a decrease of  
100mV in the output voltage.  
CODE  
10000  
10001  
10010  
10011  
10100  
10101  
10110  
10111  
11000  
11001  
11010  
11011  
11100  
11101  
11110  
11111  
00000  
00001  
00010  
00011  
00100  
00101  
00110  
00111  
01000  
01001  
01010  
01011  
01100  
01101  
01110  
01111  
VID4  
Float  
Float  
Float  
Float  
Float  
Float  
Float  
Float  
Float  
Float  
Float  
Float  
Float  
Float  
Float  
Float  
GND  
GND  
GND  
GND  
GND  
GND  
GND  
GND  
GND  
GND  
GND  
GND  
GND  
GND  
GND  
GND  
VID3  
GND  
GND  
GND  
GND  
GND  
GND  
GND  
GND  
Float  
Float  
Float  
Float  
Float  
Float  
Float  
Float  
GND  
GND  
GND  
GND  
GND  
GND  
GND  
GND  
Float  
Float  
Float  
Float  
Float  
Float  
Float  
Float  
VID2  
GND  
GND  
GND  
GND  
Float  
Float  
Float  
Float  
GND  
GND  
GND  
GND  
Float  
Float  
Float  
Float  
GND  
GND  
GND  
GND  
Float  
Float  
Float  
Float  
GND  
GND  
GND  
GND  
Float  
Float  
Float  
Float  
VID1  
GND  
GND  
Float  
Float  
GND  
GND  
Float  
Float  
GND  
GND  
Float  
Float  
GND  
GND  
Float  
Float  
GND  
GND  
Float  
Float  
GND  
GND  
Float  
Float  
GND  
GND  
Float  
Float  
GND  
GND  
Float  
Float  
VID0  
GND  
Float  
GND  
Float  
GND  
Float  
GND  
Float  
GND  
Float  
GND  
Float  
GND  
Float  
GND  
Float  
GND  
Float  
GND  
Float  
GND  
Float  
GND  
Float  
GND  
Float  
GND  
Float  
GND  
Float  
GND  
Float  
OUTPUT  
3.5V  
3.4V  
3.3V  
3.2V  
When all five VID inputs are high or floating, such as when  
no CPU is present in a system, a regulated 2V output is  
3.1V  
3.0V  
generated at VSENSE  
.
2.9V  
Each VID input pin is pulled up by a 40k resistor in series  
with a diode connected to VCC. Therefore, it should be  
grounded (or driven low) to produce a digital low input. It  
can either be floated or connected to VCC to get a digital  
high input. The series diode is included to prevent the  
input from being damaged or clamped when it is driven  
higher than VCC.  
2.8V  
2.7V  
2.6V  
2.5V  
2.4V  
2.3V  
2.2V  
2.1V  
Voltage Sensing and Feedback Pins  
*
The FB pin is a high impedance node that requires mini-  
mum layout distance to reduce extra loading and  
unwanted stray pickup.  
2.05V  
2.00V  
1.95V  
1.90V  
1.85V  
1.80V  
1.75V  
1.70V  
1.65V  
1.60V  
1.55V  
1.50V  
1.45V  
1.40V  
1.35V  
1.30V  
When used with the LTC1629 or LTC1929, the  
LTC1706-81’s FB, SENSE, VCC and GND pins should be  
connected, respectively, with the EAIN, VDIFFOUT, INTVCC  
and SGND pins of the LTC1629 and LTC1929. The result  
of this application is a precisely controlled, multiphase,  
variable output voltage supply to any low voltage, high  
current system such as a powerful personal computer,  
workstation or network server. True remote sense capa-  
bility is retained in this case.  
VID Input Characteristics  
The VID inputs should be driven with a maximum VIL of  
0.4V and a minimum VIH of 1.6V. However, the VID input  
range is not limited to values less than VCC. Because of the  
internal diode between VCC and the pull-up resistor, the  
inputs can go higher than VCC without being clamped to  
VCC or damaging the input.  
* Represents codes without a defined output voltage as specified in Intel  
specifications. The LTC1706-81 interprets these codes as a valid input and  
produces an output voltage as follows: (11111) = 2V  
This allows the LTC1706-81 to be fully logic compatible  
and operational over a higher input voltage range (less  
than the 7V absolute maximum rating).  
6
LTC1706-81  
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APPLICATIONS INFORMATION  
When a VID input is grounded, there will be a higher  
quiescentcurrentflowfromVCC becauseofaresistorfrom  
VCC through a series diode to each one of the inputs. This  
increase in quiescent current is calculated from:  
Inotherwords,eachVIDinputhasatypicalpull-upcurrent  
of 68µA for a 3.3V system.  
Besides the LTC1629, the LTC1706-81 also programs a  
wholefamilyofLTCDC/DCconvertersthathaveanonboard  
0.8V reference. The LTC1628, LTC1735, LTC1622,  
LTC1772 and LTC1929 are just a few of the high efficiency  
step-down switching regulators that will work equally well  
with the LTC1706-81.  
IQ = N(VCC – VDIODE)/RPULLUP  
NisthenumberofgroundedVIDinputs.VDIODE istypically  
0.6V while RPULLUP has a typical pull-up resistance of  
40kΩ.  
U
PACKAGE DESCRIPTION  
Dimensions in inches (millimeters) unless otherwise noted.  
MS10 Package  
10-Lead Plastic MSOP  
(LTC DWG # 05-08-1661)  
0.118 ± 0.004*  
(3.00 ± 0.102)  
10 9  
8
7 6  
0.118 ± 0.004**  
(3.00 ± 0.102)  
0.193 ± 0.006  
(4.90 ± 0.15)  
1
2
3
4 5  
0.040 ± 0.006  
(1.02 ± 0.15)  
0.034 ± 0.004  
(0.86 ± 0.102)  
0.007  
(0.18)  
0° – 6° TYP  
SEATING  
PLANE  
0.009  
(0.228)  
REF  
0.021 ± 0.006  
(0.53 ± 0.015)  
0.006 ± 0.004  
(0.15 ± 0.102)  
0.0197  
(0.50)  
BSC  
MSOP (MS10) 1098  
* DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. MOLD FLASH,  
PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE  
** DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS.  
INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE  
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.  
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-  
tationthattheinterconnectionofitscircuitsasdescribedhereinwillnotinfringeonexistingpatentrights.  
7
LTC1706-81  
U
TYPICAL APPLICATION  
VID Controlled High Current 70A 4-Phase Application  
OPTIONAL SYNC  
CLOCK IN  
L1  
1
2
3
4
5
6
7
8
9
28  
27  
26  
25  
24  
23  
22  
21  
20  
19  
18  
17  
16  
15  
RUN/SS  
SENSE1  
SENSE1  
EAIN  
CLKOUT  
TG1  
5V  
+
–
0.003Ω  
0.33µF  
SW1  
1000pF  
0.47µF  
D1  
M1  
BOOST1  
MBRS  
340T3  
10Ω  
5
PLLFLTR  
PLLIN  
V
M2  
M3  
IN  
V
CC  
1µF  
1
2
3
4
7
BG1  
VID0  
VID1  
VID2  
VID3  
VID4  
0.33µF  
6
150µF, 16V  
× 2  
1µF  
25V  
PHASMD  
SENSE  
EXTV  
CC  
D7  
D8  
+
V
OUT  
100pF  
LTC1629  
22µF  
6.3V  
I
TH  
C
1.3V TO  
3.5V  
+
INTV  
CC  
OUT  
6800pF  
1000pF  
FROM  
µP  
47k  
470µF, 6.3V  
+
GND  
LTC1706-81  
SGND  
PGND  
BG2  
× 3  
70A  
10  
11  
12  
13  
14  
V
V
V
DIFFOUT  
10  
–
FB  
D2  
M4  
OS  
BOOST2  
SW2  
MBRS  
340T3  
0.47µF  
+
OS  
M5  
GND  
9
M6  
–
SENSE2  
SENSE2  
TG2  
0.003Ω  
+
AMPMD  
L2  
24k  
75k  
L3  
1
2
28  
27  
26  
25  
24  
23  
22  
21  
20  
19  
18  
17  
16  
15  
RUN/SS  
CLKOUT  
TG1  
5V  
0.003Ω  
+
SENSE1  
SENSE1  
EAIN  
3
–
SW1  
47pF  
D3  
MBRS  
340T3  
1000pF  
6800pF  
4
0.47µF  
BOOST1  
M7  
10k  
10Ω  
5
PLLFLTR  
PLLIN  
V
M9  
IN  
M8  
0.01µF  
1µF  
6
C
OUT  
BG1  
150µF, 16V  
× 2  
470µF, 6.3V  
× 3  
7
PHASMD  
EXTV  
CC  
1µF  
25V  
47k  
D9  
8
LTC1629  
22µF  
6.3V  
I
TH  
INTV  
CC  
+
+
100pF  
+
9
D10  
GND  
SGND  
PGND  
BG2  
V
IN  
12V  
10  
11  
12  
13  
14  
NC  
V
V
V
DIFFOUT  
–
D4  
BOOST2  
SW2  
M10  
OS  
0.47µF  
MBRS  
340T3  
+
M12  
M11  
OS  
M1 TO M12: FDS7760A  
1000pF  
L1 TO L4: 1µH SUMIDA CEPH149-IROMC  
–
SENSE2  
SENSE2  
TG2  
D7 TO D10: CENTROI CMDSH-3TR  
0.003Ω  
+
C
SW  
: KEMET T510X477M006AS  
AMPMD  
OUT  
: 200kHz  
f
L4  
1706-81 TA02  
RELATED PARTS  
PART NUMBER  
LTC1622  
DESCRIPTION  
Low Voltage Step-Down Controller  
Dual High Efficiency, 2-Phase Synchronous Step-Down Controller Constant, Standby, 5V and 3.3V LDOs, 3.5V ≤ V ≤ 36V  
COMMENTS  
8-Pin MSOP, 2V ≤ V ≤ 10V, 550kHz, Burst ModeTM Operation  
IN  
LTC1628  
IN  
LTC1629  
PolyPhaseTM High Efficiency Step-Down DC/DC Controller  
Expandable Up to 12 Phases, Up to 120A, Remote Sense Diff Amp  
TM, 2.7V ≤ V ≤ 7V  
LTC1702/LTC1703 Dual High Efficiency, 2-Phase Synchronous Step-Down Controller 550kHz, 25MHz GBW, No R  
SENSE  
IN  
LTC1709  
LTC1735  
2-Phase Synchronous Step-Down Controller with 5-Bit VID  
High Efficiency Synchronous Step-Down Controller  
4V ≤ V ≤ 36V, PLL, 36-Pin SSOP, Current Mode Operation  
IN  
Burst Mode Operation, 16-Pin Narrow SSOP, Fault Protection,  
3.5V ≤ V ≤ 36V  
IN  
LTC1736  
LTC1772  
LTC1929  
High Efficiency Synchronous Step-Down Controller with 5-Bit VID GN-24, Power Good, Output Fault Protection, 3.5V ≤ V ≤ 36V  
IN  
SOT-23 Low Voltage Step-Down Controller  
2-Phase Synchronous Step-Down Controller  
6-Pin SOT-23, 2V ≤ V ≤ 10V, 550kHz, Burst Mode Operation  
IN  
Current Mode Operation, I  
Up to 40A, 3.5V ≤ V ≤ 36V  
OUT  
IN  
Burst Mode, PolyPhase and No R  
are trademarks of Linear Technology Corporation.  
SENSE  
170681f LT/TP 0400 4K • PRINTED IN USA  
LinearTechnology Corporation  
1630 McCarthy Blvd., Milpitas, CA 95035-7417  
8
●
●
(408)432-1900 FAX:(408)434-0507 www.linear-tech.com  
LINEAR TECHNOLOGY CORPORATION 1999  

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