View LTC1044A_111159.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

LTC1044A 12V CMOS Voltage Converter
FEATURES
s s s s s
DESCRIPTIO
s s s
1.5V to 12V Operating Supply Voltage Range 13V Absolute Maximum Rating 200A Maximum No Load Supply Current at 5V Boost Pin (Pin 1) for Higher Switching Frequency 97% Minimum Open Circuit Voltage Conversion Efficiency 95% Minimum Power Conversion Efficiency IS = 1.5A with 5V Supply When OSC Pin = 0V or V + High Voltage Upgrade to ICL7660/LTC1044
The LTC1044A is a monolithic CMOS switched-capacitor voltage converter. It plugs in for ICL7660/LTC1044 in applications where higher input voltage (up to 12V) is needed. The LTC1044A provides several conversion functions without using inductors. The input voltage can be inverted (VOUT = - VIN), doubled (VOUT = 2VIN), divided (VOUT = VIN/2) or multiplied (VOUT = nVIN). To optimize performance in specific applications, a boost function is available to raise the internal oscillator frequency by a factor of 7. Smaller external capacitors can be used in higher frequency operation to save board space. The internal oscillator can also be disabled to save power. The supply current drops to 1.5A at 5V input when the OSC pin is tied to GND or V +.
APPLICATI
s s s s s s s
S
Conversion of 10V to 10V Supplies Conversion of 5V to 5V Supplies Precise Voltage Division: VOUT = VIN/2 20ppm Voltage Multiplication: VOUT = nVIN Supply Splitter: VOUT = VS/2 Automotive Applications Battery Systems with 9V Wall Adapters/Chargers
TYPICAL APPLICATI
Generating - 10V from 10V
LTC1044A 1 2 BOOST CAP+ GND CAP- V+ OSC LV VOUT
LTC1044A * TA01
Output Voltage vs Load Current, V + = 10V
0
8 7
10V INPUT
OUTPUT VOLTAGE (V)
-1 -2 -3 -4 -5 -6 -7 -8 -9 -10 0
TA = 25C C1 = C2 = 10F
+
10F
3 4
6 5 -10V OUTPUT 10F
10 20 30 40 50 60 70 80 90 100 LOAD CURRENT (mA)
LTC1044A * TA02
U
SLOPE = 45
+
UO
UO
1
LTC1044A
ABSOLUTE
(Note 1)
AXI U
RATI GS
PACKAGE/ORDER I FOR ATIO
TOP VIEW BOOST 1 CAP+ 2 GND 3 CAP- 4 8 7 6 5 V+ OSC LV VOUT
Supply Voltage ........................................................ 13V Input Voltage on Pins 1, 6 and 7 (Note 2) .............................. - 0.3V < VIN < V + + 0.3V Current into Pin 6 ................................................. 20A Output Short-Circuit Duration V + 6.5V ................................................. Continuous Operating Temperature Range LTC1044AC ............................................ 0C to 70C LTC1044AI ........................................ - 40C to 85C Storage Temperature Range ................ - 65C to 150C Lead Temperature (Soldering, 10 sec)................. 300C
ORDER PART NUMBER LTC1044ACN8 LTC1044AIN8
N8 PACKAGE 8-LEAD PLASTIC DIP
TJMAX = 110C, JA = 100C/W
TOP VIEW BOOST 1 CAP+ 2 8 7 6 5 V+ OSC LV VOUT
ORDER PART NUMBER LTC1044ACS8 LTC1044AIS8 S8 PART MARKING 1044A 1044AI
GND 3 CAP- 4
S8 PACKAGE 8-LEAD PLASTIC SOIC
TJMAX = 110C, JA = 130C/W
Consult factory for Military grade parts
ELECTRICAL CHARACTERISTICS
SYMBOL IS PARAMETER Supply Current CONDITIONS
V + = 5V, COSC = 0pF, TA = 25C, See Test Circuit, unless otherwise noted.
MIN LTC1044AC LTC1044AI TYP MAX MIN TYP MAX 60 15
q q q q q q
UNITS A A V
RL = , Pins 1 and 7, No Connection RL = , Pins 1 and 7, No Connection, V + = 3V RL = 10k RL = 10k IL = 20mA, fOSC = 5kHz V + = 2V, IL = 3mA, fOSC = 1kHz 1.5
200
60 15 1.5
200
Minimum Supply Voltage Maximum Supply Voltage ROUT Output Resistance
12 100 120 310 5 1 95 97 98 99.9 3 20 5 1 95 97 98 99.9
12 100 130 325
fOSC PEFF
Oscillator Frequency Power Efficiency Voltage Conversion Efficiency Oscillator Sink or Source Current
V + = 5V, (Note 3) V + = 2V RL = 5k, fOSC = 5kHz RL = VOSC = 0V or V + Pin 1 (BOOST) = 0V Pin 1 (BOOST) = V +
q q
3 20
The q denotes specifications which apply over the full operating temperature range; all other limits and typicals TA = 25C. Note 1: Absolute maximum ratings are those values beyond which the life of a device may be impaired. Note 2: Connecting any input terminal to voltages greater than V + or less than ground may cause destructive latch-up. It is recommended that no
inputs from sources operating from external supplies be applied prior to power-up of the LTC1044A. Note 3: fOSC is tested with COSC = 100pF to minimize the effects of test fixture capacitance loading. The 0pF frequency is correlated to this 100pF test point, and is intended to simulate the capacitance at pin 7 when the device is plugged into a test socket and no external capacitor is used.
2
U
V kHz kHz % % A A
W
U
U
WW
W
LTC1044A
TYPICAL PERFOR A CE CHARACTERISTICS
Operating Voltage Range vs Temperature
14 12
POWER EFFICIENCY (%)
10 8 6 4 2 0 -55 -25
POWER EFFICIENCY (%)
SUPPLY VOLTAGE (V)
0 50 100 25 75 AMBIENT TEMPERATURE (C)
LTC1044A * TPC01
Output Resistance vs Oscillator Frequency, V + = 5V
500 C1 = C2 = 10F OUTPUT RESISTANCE () 400 C1 = C2 = 1F 300 TA = 25C IL = 10mA
OUTPUT RESISTANCE ()
POWER CONVERSION EFFICIENCY (%)
200
100 C1 = C2 = 100F 0 100 1k 10k OSCILLATOR FREQUENCY (Hz) 100k
LTC1044A * TPC04
Power Conversion Efficiency vs Load Current, V + = 5V
100
POWER CONVERSION EFFICIENCY (%)
PEFF
POWER CONVERSION EFFICIENCY (%)
90 80 70 60 50 40 30 20 10 0 0 10
40 30 20 50 LOAD CURRENT (mA)
UW
IS
Using the Test Circuit Power Efficiency vs Oscillator Frequency, V + = 10V
100 98 96 100F IL = 1mA TA = 25C C1 = C2
Power Efficiency vs Oscillator Frequency, V + = 5V
100 98 96 94 92 90 88 86 84 82 125 80 100 1k 10k OSCILLATOR FREQUENCY (Hz) 100k 100F 10F IL = 15mA 1F 10F 1F IL = 1mA 100F TA = 25C C1 = C2
94 92 90 88 86 84 82
10F
10F
100F IL = 15mA
1F
1F
80 100
1k 10k OSCILLATOR FREQUENCY (Hz)
100k
LTC1044A * G02
LTC1044A * TPC03
Output Resistance vs Oscillator Frequency, V + = 10V
500 TA = 25C IL = 10mA 400
100 90 80 70 60 50 40 30 20 10 0
Power Conversion Efficiency vs Load Current, V + = 2V
10 PEFF TA = 25C C1 = C2 = 10F fOSC = 1kHz 9 8
SUPPLY CURRENT (mA)
7 IS 6 5 4 3 2 1 0 0 1 4 3 2 5 LOAD CURRENT (mA) 6 7
300 C1 = C2 = 100F C1 = C2 = 10F
C1 = C2 = 1F
200
100
0 100
1k 10k OSCILLATOR FREQUENCY (Hz)
100k
LTC1044A * TPC05
LTC1044A * TPC06
Power Conversion Efficiency vs Load Current, V + = 10V
100 100 90 80 70 60 50 40 30 20 10 0 0 20 80 60 40 100 LOAD CURRENT (mA) 120 TA = 25C C1 = C2 = 10F fOSC = 20kHz IS PEFF 300 270 240
SUPPLY CURRENT (mA)
TA = 25C C1 = C2 = 10F fOSC = 5kHz
90 80
SUPPLY CURRENT (mA)
70 60 50 40 30 20 10 0 60 70
210 180 150 120 90 60 30
0 140
LTC1044A * TPC07
LTC1044A * TPC08
3
LTC1044A
TYPICAL PERFOR A CE CHARACTERISTICS
Output Resistance vs Supply Voltage
1000 TA = 25C IL = 3mA
OUTPUT RESISTANCE ()
OUTPUT VOLTAGE (V)
COSC = 100pF 100 COSC = 0pF
1.0 0.5 0 - 0.5 -1.0 -1.5 -2.0 SLOPE = 250
OUTPUT VOLTAGE (V)
10 0
1
2
3
4 5 6 7 8 9 10 11 12 SUPPLY VOLTAGE (V)
LTC1044A * TPC09
Output Voltage vs Load Current, V + = 10V
10 8 6 TA = 25C fOSC = 20kHz
OUTPUT RESISTANCE ()
400 360 320 280 240 200 160 120 80 40
OSCILLATOR FREQUENCY (Hz)
OUTPUT VOLTAGE (V)
4 2 0 -2 -4 -6 -8 -10 0 10 20 30 40 50 60 70 80 90 100 LOAD CURRENT (mA)
LTC1044A * TPC12
SLOPE = 45
Oscillator Frequency as a Function of COSC, V + = 10V
100k V + = 10V TA = 25C PIN 1 = V +
100k
10k
OSCILLATOR FREQUENCY (kHz)
OSCILLATOR FREQUENCY (Hz)
OSCILLATOR FREQUENCY (Hz)
1k
PIN 1 = OPEN
100
10 1
100 1000 10000 10 EXTERNAL CAPACITOR (PIN 7 TO GND)(pF)
LTC1044A * TPC15
4
UW
Using the Test Circuit Output Voltage vs Load Current, V + = 5V
5 4 3 2 1 0 -1 -2 -3 -4 SLOPE = 80 TA = 25C fOSC = 5kHz
Output Voltage vs Load Current, V + = 2V
2.5 2.0 1.5 TA = 25C fOSC = 1kHz
-2.5
0
1
2
345678 LOAD CURRENT (mA)
9
10
-5
0
10 20 30 40 50 60 70 80 90 100 LOAD CURRENT (mA)
LTC1044A * TPC11
LTC1044A * TPC10
Output Resistance vs Temperature
100k
C1 = C2 = 10F
Oscillator Frequency as a Function of COSC, V + = 5V
TA = 25C PIN 1 = V +
V + = 2V, fOSC = 1kHz
10k
1k PIN 1 = OPEN 100
V + = 5V, fOSC = 5kHz
V + = 10V, fOSC = 20kHz 0 50 25 0 75 100 -55 -25 AMBIENT TEMPERATURE (C)
125
10 1
100 1000 10000 10 EXTERNAL CAPACITOR (PIN 7 TO GND)(pF)
LTC1044A * TPC14
LTC1044A * TPC13
Oscillator Frequency vs Supply Voltage
35
TA = 25C COSC = 0pF
Oscillator Frequency vs Temperature
COSC = 0pF 30 25 20 15 10 5 0 -55 -25 V + = 5V
10k
V + = 10V
1k
0.1k 0 1 2 3 4 5 6 7 8 9 10 11 12 SUPPLY VOLTAGE (V)
LTC1044A * G16
50 100 25 75 0 AMBIENT TEMPERATURE (C)
125
LTC1044A * TPC17
LTC1044A
TEST CIRCUIT
V + (5V) IS 1 2 8 7 LTC1044A 6 5
LTC1044A * TC
+
C1 10F
3 4
EXTERNAL OSCILLATOR
RL
IL VOUT
APPLICATI
S I FOR ATIO
Theory of Operation To understand the theory of operation of the LTC1044A, a review of a basic switched-capacitor building block is helpful. In Figure 1, when the switch is in the left position, capacitor C1 will charge to voltage V1. The total charge on C1 will be q1 = C1V1. The switch then moves to the right, discharging C1 to voltage V2. After this discharge time, the charge on C1 is q2 = C1V2. Note that charge has been transferred from the source, V1, to the output, V2. The amount of charge transferred is: q = q1 - q2 = C1(V1 - V2) If the switch is cycled f times per second, the charge transfer per unit time (i.e., current) is: I = f x q = f x C1(V1 - V2)
V1 f RL C1 C2
LTC1044A * F01
REQUIV V1 V2
REQUIV =
1 f x C1
Figure 2. Switched-Capacitor Equivalent Circuit
Examination of Figure 3 shows that the LTC1044A has the same switching action as the basic switched-capacitor building block. With the addition of finite switch-on resistance and output voltage ripple, the simple theory although not exact, provides an intuitive feel for how the device works. For example, if you examine power conversion efficiency as a function of frequency (see typical curve), this simple theory will explain how the LTC1044A behaves. The loss, and hence the efficiency, is set by the output impedance. As frequency is decreased, the output impedance will eventually be dominated by the 1/(f x C1) term, and power efficiency will drop. The typical curves for Power Efficiency vs Frequency show this effect for various capacitor values. Note also that power efficiency decreases as frequency goes up. This is caused by internal switching losses which occur due to some finite charge being lost on each switching cycle. This charge loss per unit cycle, when multiplied by the switching frequency, becomes a current loss. At high frequency this loss becomes significant and the power efficiency starts to decrease.
V2
Figure 1. Switched-Capacitor Building Block
Rewriting in terms of voltage and impedance equivalence,
I = V1 - V2 = V1 - V2 1/(f x C1) REQUIV
A new variable, REQUIV, has been defined such that REQUIV = 1/(f x C1). Thus, the equivalent circuit for the switchedcapacitor network is as shown in Figure 2.
+
COSC
C2 10F
U
C2 RL
LTC1044A * F02
W
U
UO
5
LTC1044A
APPLICATI
S I FOR ATIO
V+ (8) SW1 BOOST 7X (1) OSC OSC (7) C+ (2) SW2
/2
LV (6)
CLOSED WHEN V + > 3V
LTC1044A * F03
GND (3)
Figure 3. LTC1044A Switched-Capacitor Voltage Converter Block Diagram
LV (Pin 6) The internal logic of the LTC1044A runs between V + and LV (pin 6). For V + greater than or equal to 3V, an internal switch shorts LV to GND (pin 3). For V + less than 3V, the LV pin should be tied to GND. For V + greater than or equal to 3V, the LV pin can be tied to GND or left floating. OSC (Pin 7) and Boost (Pin 1) The switching frequency can be raised, lowered, or driven from an external source. Figure 4 shows a functional diagram of the oscillator circuit. By connecting the boost pin (pin 1) to V +, the charge and discharge current is increased and hence, the frequency is increased by approximately 7 times. Increasing the
V+
frequency will decrease output impedance and ripple for higher load currents. Loading pin 7 with more capacitance will lower the frequency. Using the boost (pin 1) in conjunction with external capacitance on pin 7 allows user selection of the frequency over a wide range. Driving the LTC1044A from an external frequency source can be easily achieved by driving pin 7 and leaving the boost pin open as shown in Figure 5. The output current from pin 7 is small (typically 0.5A) so a logic gate is capable of driving this current. The choice of using a CMOS logic gate is best because it can operate over a wide supply voltage range (3V to 15V) and has enough voltage swing to drive the internal Schmitt trigger shown in Figure 4. For 5V applications, a TTL logic gate can be used by simply adding an external pull-up resistor (see Figure 5).
V+ 100k REQUIRED FOR TTL LOGIC OSC INPUT
6I BOOST (1)
I
NC
1 2 LTC1044A
8 7 6 5
+
C1
3 4
6I LV (6)
I
LTC1044A * F04
Figure 5. External Clocking Figure 4. Oscillator
6
+
~14pF
OSC (7)
SCHMITT TRIGGER
+
U
+
C1 C- (4) VOUT (5) C2
-(V +) C2
LTC1044A * F05
W
U
UO
LTC1044A
APPLICATI
S I FOR ATIO
Capacitor Selection External capacitors C1 and C2 are not critical. Matching is not required, nor do they have to be high quality or tight tolerance. Aluminum or tantalum electrolytics are excellent choices with cost and size being the only consideration. Negative Voltage Converter Figure 6 shows a typical connection which will provide a negative supply from an available positive supply. This circuit operates over full temperature and power supply ranges without the need of any external diodes. The LV pin (pin 6) is shown grounded, but for V + 3V it may be "floated", since LV is internally switched to ground (pin 3) for V + 3V. The output voltage (pin 5) characteristics of the circuit are those of a nearly ideal voltage source in series with an 80 resistor. The 80 output impedance is composed of two terms: 1. The equivalent switched-capacitor resistance (see Theory of Operation). 2. A term related to the on-resistance of the MOS switches. At an oscillator frequency of 10kHz and C1 = 10F, the first term is:
REQUIV = =
1 (fOSC/2) x C1
1 = 20 5 x 103 x 10 x 10 -6
+
C1 10F
Notice that the above equation for REQUIV is not a capacitive reactance equation (XC = 1/C) and does not contain a 2 term.
1 2 8 7 LTC1044A 6 5 REQUIRED FOR V + < 3V VOUT = - V + 10F V + (1.5V TO 12V)
+
10F
3 4
TMIN TA TMAX
Figure 6. Negative Voltage Converter
+
LTC1044A * F06
U
The exact expression for output resistance is extremely complex, but the dominant effect of the capacitor is clearly shown on the typical curves of Output Resistance and Power Efficiency vs Frequency. For C1 = C2 = 10F, the output impedance goes from 60 at fOSC = 10kHz to 200 at fOSC = 1kHz. As the 1/(f x C) term becomes large compared to the switch-on resistance term, the output resistance is determined by 1/(f x C) only. Voltage Doubling Figure 7 shows a two-diode capacitive voltage doubler. With a 5V input, the output is 9.93V with no load and 9.13V with a 10mA load. With a 10V input, the output is 19.93V with no load and 19.28V with a 10mA load.
VIN (1.5V TO 12V) 1 2 3 4
LTC1044A * F07
W
U
UO
8 7 LTC1044A 6 5 Vd 1N5817 REQUIRED FOR V + < 3V
+
+ +
Vd 1N5817 VOUT = 2(VIN - 1)
+
10F 10F
Figure 7. Voltage Doubler
Ultra-Precision Voltage Divider An ultra-precision voltage divider is shown in Figure 8. To achieve the 0.0002% accuracy indicated, the load current should be kept below 100nA. However, with a slight loss in accuracy the load current can be increased.
1 2 3 4
LTC1044A * F08
8 7 LTC1044A 6 5
V + (3V TO 24V)
V +/2 0.002% TMIN TA TMAX IL 100nA
+
C2 10F
REQUIRED FOR V + < 6V
Figure 8. Ultra-Precision Voltage Divider
7
LTC1044A
APPLICATI
Battery Splitter
S I FOR ATIO
A common need in many systems is to obtain (+) and (-) supplies from a single battery or single power supply system. Where current requirements are small, the circuit shown in Figure 9 is a simple solution. It provides symmetrical output voltages, both equal to one half input voltage. The output voltages are both referenced to pin 3
1 8 7 LTC1044A 6 5
LTC1044A * F09
+
+VB/2 (6V)
VB 12V
2
+ C1
10F
3 4
REQUIRED FOR V B < 6V +VB/2 (-6V)
C2 10F OUTPUT COMMON
Figure 9. Battery Splitter
1 2
8 7 LTC1044A 6 5
+ C1
10F
3 4
*
LTC1044A * F10
*THE EXCLUSIVE NOR GATE SYNCHRONIZES BOTH LTC1044As TO MINIMIZE RIPPLE
Figure 10. Paralleling for Lower Output Resistance
V+ FOR V OUT = -3V + FOR V OUT = -2V +
1 2
8 7 LTC1044A 6 5 - (V + ) 10F
10F
1 2 3 4
LTC1044A * F11
8 7 LTC1044A 6 5 10F V OUT
+
+
10F
3 4
Figure 11. Stacking for Higher Voltage
8
+
+
+
U
(output common). If the input voltage between pin 8 and pin 5 is less than 6V, pin 6 should also be connected to pin 3 as shown by the dashed line. Paralleling for Lower Output Resistance Additional flexibility of the LTC1044A is shown in Figures 10 and 11. Figure 10 shows two LTC1044As connected in parallel to provide a lower effective output resistance. If, however, the output resistance is dominated by 1/(f x C1), increasing the capacitor size (C1) or increasing the frequency will be of more benefit than the paralleling circuit shown. Figure 11 makes use of "stacking" two LTC1044As to provide even higher voltages. A negative voltage doubler or tripler can be achieved, depending upon how pin 8 of the second LTC1044A is connected, as shown schematically by the switch. The available output current will be dictated/ decreased by the product of the individual power conversion efficiencies and the voltage step-up ratio.
V+ 1 2 8 7 LTC1044A 6 5 V OUT = -(V + )
W
+
U
UO
+ C1
10F
3 4
1/4 CD4077
C2 20F
LTC1044A
TYPICAL APPLICATIO S
Low Output Impedance Voltage Converter
200k 8.2k 50k 6 1 8 200k 39k 0.1F VOUT ADJ
VIN* 3
+ -
4 50k
39k
LM10 2
LTC1044A
LTC1044 * F12
1
2
3 10F
4
*VIN -VOUT + 0.5V LOAD REGULATION 0.02%, 0mA TO 15mA
+
Single 5V Strain Gauge Bridge Signal Conditioner
1 2
8 7 LTC1044A 6 5 -5V 100F
+
100F 220
3 4
+
8
4 0.33F 3 1.2V REFERENCE TO A/D CONVERTER FOR RATIOMETRIC OPERATION (1mA MAX) 10k LT1004 ZERO 1.2V TRIM 301k* D 100k
+
1
2
-
LT1413
A 350 PRESSURE TRANSDUCER
E 0V
5
+
7
39k *1% FILM RESISTOR PRESSURE TRANSDUCER BLH/DHF-350 (CIRCLED LETTER IS PIN NUMBER) -1.2V C 0.1F
6
-
LTC1044A * F13
+
U
7
+
100F
8
7
6
5
OUTPUT 10F
5V
2k GAIN TRIM 46k*
OUTPUT 0V TO 3.5V 0psi to 350psi 0.047F
100*
9
LTC1044A
TYPICAL APPLICATIO S
Regulated Output 3V to 5V Converter
3V 1N914 200 1 2 3 LTC1044A 8 7 6 5 1M 7 8 4.8M
1k 330k EVEREADY EXP-30
1
REF AMP
LM10 2
1k
6
OP AMP
4 1N914 150k 100k
LTC1044A * F14
Low Dropout 5V Regulator
2N2219 1N914 200 1 2 LTC1044A 8 7 6 5 12V VOUT = 5V
+
10F
+
10F 100 120k
3 4
100k SHORT-CIRCUIT PROTECTION 2 8 V+ 5 FEEDBACK AMP LOAD
6V 4 EVEREADY E-91 CELLS
1M
-
LT1013
+
7
3
+
V- 4 1 1N914 6
-
LT1004 1.2V 0.01
1.2k
10
-
-
+
+
U
+
100F
5V OUTPUT
+
10F
4
3
30k 50k OUTPUT ADJUST
LTC1044A * F15
VDROPOUT AT 1mA = 1mV VDROPOUT AT 10mA = 15mV VDROPOUT AT 100mA = 95mV
LTC1044A
PACKAGE DESCRIPTIO U
Dimensions in inches (millimeters) unless otherwise noted. N8 Package 8-Lead Plastic DIP
0.400 (10.160) MAX 8 7 6 5
0.250 0.010 (6.350 0.254)
1
2
3
4
0.300 - 0.320 (7.620 - 8.128)
0.045 - 0.065 (1.143 - 1.651)
0.130 0.005 (3.302 0.127)
0.009 - 0.015 (0.229 - 0.381)
0.065 (1.651) TYP 0.125 (3.175) MIN 0.020 (0.508) MIN
(
+0.025 0.325 -0.015 +0.635 8.255 -0.381
)
0.045 0.015 (1.143 0.381) 0.100 0.010 (2.540 0.254)
0.018 0.003 (0.457 0.076)
N8 0392
S8 Package 8-Lead Plastic SOIC
0.189 - 0.197 (4.801 - 5.004) 8 7 6 5
0.228 - 0.244 (5.791 - 6.197)
0.150 - 0.157 (3.810 - 3.988)
1 0.010 - 0.020 x 45 (0.254 - 0.508) 0.008 - 0.010 (0.203 - 0.254)
0- 8 TYP
2
3
4
0.053 - 0.069 (1.346 - 1.752)
0.004 - 0.010 (0.101 - 0.254)
0.016 - 0.050 0.406 - 1.270
0.014 - 0.019 (0.355 - 0.483)
0.050 (1.270) BSC
SO8 0392
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 representation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
11
LTC1044A
U.S. Area Sales Offices
NORTHEAST REGION Linear Technology Corporation One Oxford Valley 2300 E. Lincoln Hwy.,Suite 306 Langhorne, PA 19047 Phone: (215) 757-8578 FAX: (215) 757-5631 Linear Technology Corporation 266 Lowell St., Suite B-8 Wilmington, MA 01887 Phone: (508) 658-3881 FAX: (508) 658-2701 SOUTHEAST REGION Linear Technology Corporation 17060 Dallas Parkway Suite 208 Dallas, TX 75248 Phone: (214) 733-3071 FAX: (214) 380-5138 CENTRAL REGION Linear Technology Corporation Chesapeake Square 229 Mitchell Court, Suite A-25 Addison, IL 60101 Phone: (708) 620-6910 FAX: (708) 620-6977 SOUTHWEST REGION Linear Technology Corporation 22141 Ventura Blvd. Suite 206 Woodland Hills, CA 91364 Phone: (818) 703-0835 FAX: (818) 703-0517 NORTHWEST REGION Linear Technology Corporation 782 Sycamore Dr. Milpitas, CA 95035 Phone: (408) 428-2050 FAX: (408) 432-6331
International Sales Offices
FRANCE Linear Technology S.A.R.L. Immeuble "Le Quartz" 58 Chemin de la Justice 92290 Chatenay Malabry France Phone: 33-1-41079555 FAX: 33-1-46314613 GERMANY Linear Technology GMBH Untere Hauptstr. 9 D-85386 Eching Germany Phone: 49-89-3197410 FAX: 49-89-3194821 JAPAN Linear Technology KK 5F YZ Bldg. 4-4-12 Iidabashi, Chiyoda-Ku Tokyo, 102 Japan Phone: 81-3-3237-7891 FAX: 81-3-3237-8010 KOREA Linear Technology Korea Branch Namsong Building, #505 Itaewon-Dong 260-199 Yongsan-Ku, Seoul Korea Phone: 82-2-792-1617 FAX: 82-2-792-1619 SINGAPORE Linear Technology Pte. Ltd. 101 Boon Keng Road #02-15 Kallang Ind. Estates Singapore 1233 Phone: 65-293-5322 FAX: 65-292-0398 TAIWAN Linear Technology Corporation Rm. 801, No. 46, Sec. 2 Chung Shan N. Rd. Taipei, Taiwan, R.O.C. Phone: 886-2-521-7575 FAX: 886-2-562-2285 UNITED KINGDOM Linear Technology (UK) Ltd. The Coliseum, Riverside Way Camberley, Surrey GU15 3YL United Kingdom Phone: 44-276-677676 FAX: 44-276-64851
World Headquarters
Linear Technology Corporation 1630 McCarthy Blvd. Milpitas, CA 95035-7487 Phone: (408) 432-1900 FAX: (408) 434-0507
08/16/93
12
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7487
(408) 432-1900 q FAX: (408) 434-0507 q TELEX: 499-3977
LT/GP 1293 10K REV 0 * PRINTED IN USA
(c) LINEAR TECHNOLOGY CORPORATION 1993

▲Up To Search▲

Price & Availability of LTC1044A

	To Download LTC1044A Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .