LTC1044AIS8#PBF [Linear]
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| 型号： | LTC1044AIS8#PBF |
| 厂家： | 
Linear |
| 描述： | 暂无描述 转换器 光电二极管 |
| 文件： | 总12页 (文件大小：276K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LTC1044A
12V CMOS
Voltage Converter
U
DESCRIPTIO
EATURE
1.5V to 12V Operating Supply Voltage Range
13V Absolute Maximum Rating
200µA 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 = 1.5µA with 5V Supply When OSC Pin = 0V or V+
High Voltage Upgrade to ICL7660/LTC1044
S
F
■
■
■
■
■
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 func-
tions 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 fre-
quency 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 1.5µA at 5V input when the
OSC pin is tied to GND or V+.
O U
PPLICATI
A
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
U
O
TYPICAL APPLICATI
Generating –10V from 10V
Output Voltage vs Load Current, V+ = 10V
0
LTC1044A
T
= 25°C
A
1
2
3
4
8
7
6
5
–1
–2
–3
–4
–5
–6
–7
–8
–9
–10
+
C1 = C2 = 10µF
10V INPUT
BOOST
V
+
CAP
OSC
LV
+
GND
10µF
–
–10V OUTPUT
CAP
V
OUT
10µF
LTC1044A • TA01
+
SLOPE = 45Ω
0
10 20 30 40 50 60 70 80 90 100
LOAD CURRENT (mA)
LTC1044A • TA02
1
LTC1044A
W W W
U
ABSOLUTE AXI U RATI GS
PACKAGE RDER I FOR ATIO
/O
(Note 1)
Supply Voltage ........................................................ 13V
Input Voltage on Pins 1, 6 and 7
TOP VIEW
ORDER PART
+
NUMBER
BOOST
1
2
3
4
V
8
7
6
5
(Note 2) .............................. –0.3V < VIN < V+ + 0.3V
Current into Pin 6 ................................................. 20µA
Output Short-Circuit Duration
+
CAP
OSC
LV
LTC1044ACN8
LTC1044AIN8
GND
–
CAP
V
OUT
V+ ≤ 6.5V .................................................Continuous
Operating Temperature Range
LTC1044AC ............................................ 0°C to 70°C
LTC1044AI ........................................ –40°C to 85°C
Storage Temperature Range ................ –65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
N8 PACKAGE
8-LEAD PLASTIC DIP
TJMAX = 110°C, θJA = 100°C/W
TOP VIEW
ORDER PART
NUMBER
+
BOOST
1
2
3
4
8
7
6
5
V
+
CAP
OSC
LV
LTC1044ACS8
LTC1044AIS8
GND
–
CAP
V
OUT
S8 PART MARKING
S8 PACKAGE
8-LEAD PLASTIC SOIC
1044A
1044AI
TJMAX = 110°C, θJA = 130°C/W
Consult factory for Military grade parts
V+ = 5V, COSC = 0pF, TA = 25°C, See Test Circuit, unless otherwise noted.
ELECTRICAL CHARACTERISTICS
LTC1044AC
TYP
LTC1044AI
TYP MAX UNITS
SYMBOL
PARAMETER
CONDITIONS
MIN
MAX MIN
I
Supply Current
R = ∞, Pins 1 and 7, No Connection
60
15
200
60
15
200
µA
µA
S
L
R = ∞, Pins 1 and 7, No Connection,
L
+
V
= 3V
Minimum Supply Voltage
Maximum Supply Voltage
Output Resistance
R = 10k
●
●
1.5
1.5
12
V
V
L
R = 10k
L
12
R
OUT
I = 20mA, f
L
= 5kHz
100
120
310
100
130
325
Ω
Ω
Ω
OSC
●
●
+
V
= 2V, I = 3mA, f
= 1kHz
OSC
L
+
+
f
Oscillator Frequency
Power Efficiency
V
V
= 5V, (Note 3)
= 2V
●
●
5
1
5
1
kHz
kHz
OSC
P
R = 5k, f = 5kHz
L OSC
95
97
98
95
97
98
%
%
EFF
Voltage Conversion Efficiency R = ∞
99.9
99.9
L
+
Oscillator Sink or Source
Current
V
= 0V or V
OSC
Pin 1 (BOOST) = 0V
Pin 1 (BOOST) = V
●
●
3
20
3
20
µA
µA
+
The
●
denotes specifications which apply over the full operating
inputs from sources operating from external supplies be applied prior to
power-up of the LTC1044A.
temperature range; all other limits and typicals T = 25°C.
A
Note 1: Absolute maximum ratings are those values beyond which the life
Note 3: f
is tested with C
= 100pF to minimize the effects of test
OSC
OSC
of a device may be impaired.
Note 2: Connecting any input terminal to voltages greater than V or less
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.
+
than ground may cause destructive latch-up. It is recommended that no
2
LTC1044A
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Using the Test Circuit
Power Efficiency vs
Oscillator Frequency, V+ = 10V
Operating Voltage Range
vs Temperature
Power Efficiency vs
Oscillator Frequency, V+ = 5V
100
98
100
98
14
12
T
= 25°C
T
= 25°C
A
A
C1 = C2
C1 = C2
100µF
10µF
100µF
I
L
= 1mA
96
96
10µF
10
8
94
94
100µF
= 15mA
1µF
I
= 1mA
L
10µF
I
L
92
90
92
90
6
88
86
84
82
80
88
86
84
82
80
100µF
10µF
I
L
= 15mA
4
1µF
2
1µF
1µF
0
100
1k
10k
100k
–55 –25
0
25
50
75
100 125
100
1k
10k
100k
OSCILLATOR FREQUENCY (Hz)
AMBIENT TEMPERATURE (°C)
OSCILLATOR FREQUENCY (Hz)
LTC1044A • G02
LTC1044A • TPC03
LTC1044A • TPC01
Power Conversion Efficiency
vs Load Current, V+ = 2V
Output Resistance vs
Oscillator Frequency, V+ = 5V
Output Resistance vs
Oscillator Frequency, V+ = 10V
500
400
300
200
100
0
100
90
80
70
60
50
40
30
20
10
0
10
9
500
400
300
200
100
0
T
= 25°C
T
I
= 25°C
= 10mA
T
I
= 25°C
= 10mA
A
A
L
A
L
C1 = C2 = 10µF
= 1kHz
P
C1 = C2 = 10µF
EFF
f
OSC
8
7
C1 = C2 = 1µF
6
I
S
C1 = C2 = 1µF
5
C1 = C2
= 100µF
C1 = C2
= 10µF
4
3
2
1
C1 = C2 = 100µF
0
100
1k
10k
100k
0
2
3
4
5
6
7
100
1k
10k
100k
1
LOAD CURRENT (mA)
OSCILLATOR FREQUENCY (Hz)
OSCILLATOR FREQUENCY (Hz)
LTC1044A • TPC05
LTC1044A • TPC04
LTC1044A • TPC06
Power Conversion Efficiency
vs Load Current, V+ = 5V
Power Conversion Efficiency
vs Load Current, V+ = 10V
100
90
80
70
60
50
40
30
20
10
0
100
90
80
70
60
50
40
30
20
10
0
100
300
270
240
210
180
150
120
90
T
= 25°C
A
90
80
70
60
50
40
30
20
10
0
C1 = C2 = 10µF
= 5kHz
P
P
EFF
EFF
f
OSC
I
S
I
S
60
T
= 25°C
A
C1 = C2 = 10µF
= 20kHz
30
f
OSC
0
0
20
30
40
50
60
70
0
40
60
80
100 120 140
10
20
LOAD CURRENT (mA)
LOAD CURRENT (mA)
LTC1044A • TPC07
LTC1044A • TPC08
3
LTC1044A
TYPICAL PERFOR A CE CHARACTERISTICS
U W
Using the Test Circuit
Output Resistance
vs Supply Voltage
Output Voltage
Output Voltage
vs Load Current, V+ = 5V
vs Load Current, V+ = 2V
1000
100
10
2.5
2.0
5
4
T
L
= 25°C
= 3mA
T
f
= 25°C
OSC
T = 25°C
A
f
A
A
I
= 1kHz
= 5kHz
OSC
1.5
3
1.0
2
C
= 100pF
OSC
0.5
1
0
0
SLOPE = 80Ω
SLOPE = 250Ω
–0.5
–1.0
–1.5
–2.0
–2.5
–1
–2
–3
–4
–5
C
OSC
= 0pF
1
2
3
4
5
6
7
8
9
10
1
2
4
6
7
8
10 11 12
0
0
10 20 30 40 50 60 70 80 90 100
LOAD CURRENT (mA)
0
3
5
9
SUPPLY VOLTAGE (V)
LOAD CURRENT (mA)
LTC1044A • TPC09
LTC1044A • TPC10
LTC1044A • TPC11
Output Voltage
vs Load Current, V+ = 10V
Output Resistance
vs Temperature
Oscillator Frequency as a
Function of COSC, V+ = 5V
400
360
320
280
240
200
160
120
80
100k
10k
1k
10
8
C1 = C2 = 10µF
T = 25°C
A
T
OSC
= 25°C
A
f
= 20kHz
+
6
PIN 1 = V
+
V
= 2V, f
= 1kHz
OSC
OSC
4
2
0
–2
–4
–6
–8
PIN 1 = OPEN
+
V
+
= 5V, f
= 5kHz
100
10
SLOPE = 45Ω
40
V
= 10V, f
25
= 20kHz
OSC
50
0
–10
0
10 20 30 40 50 60 70 80 90 100
LOAD CURRENT (mA)
–55
0
75 100 125
1
10
100
1000
10000
–25
EXTERNAL CAPACITOR (PIN 7 TO GND)(pF)
AMBIENT TEMPERATURE (°C)
LTC1044A • TPC14
LTC1044A • TPC12
LTC1044A • TPC13
Oscillator Frequency as a
Function of COSC, V+ = 10V
Oscillator Frequency
vs Supply Voltage
Oscillator Frequency
vs Temperature
100k
10k
1k
100k
10k
35
30
+
V
T
= 10V
T
= 25°C
= 0pF
A
OSC
C
OSC
= 0pF
= 25°C
C
A
+
PIN 1 = V
25
20
15
10
5
+
V
= 10V
PIN 1 = OPEN
1k
100
10
+
V
= 5V
25
0.1k
0
1
10
100
1000
10000
50
100 125
0
1
2
3
4
5
6
7
8
9
10 11 12
–55 –25
0
75
EXTERNAL CAPACITOR (PIN 7 TO GND)(pF)
SUPPLY VOLTAGE (V)
AMBIENT TEMPERATURE (°C)
LTC1044A • G16
LTC1044A • TPC15
LTC1044A • TPC17
4
LTC1044A
TEST CIRCUIT
+
V
R
(5V)
I
I
S
L
1
2
3
4
8
7
6
5
EXTERNAL
OSCILLATOR
LTC1044A
+
L
C1
10µF
V
OUT
C2
C
OSC
LTC1044A • TC
+
10µF
O U
W
U
PPLICATI
A
S I FOR ATIO
R
=
EQUIV
Theory of Operation
V1
V2
To understand the theory of operation of the LTC1044A, a
review of a basic switched-capacitor building block is
helpful.
R
L
C2
1
R
EQUIV
f × C1
LTC1044A • F02
InFigure1,whentheswitchisintheleftposition,capacitor
C1 will charge to voltage V1. The total charge on C1 will be
q1 = C1V1. The switch then moves to the right, discharg-
ing 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:
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 resis-
tance and output voltage ripple, the simple theory al-
though not exact, provides an intuitive feel for how the
device works.
∆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:
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 × C1) term, and power
efficiency will drop. The typical curves for Power Effi-
ciency vs Frequency show this effect for various capacitor
values.
I = f × ∆q = f × C1(V1 – V2)
V1
V2
f
R
L
C1
C2
LTC1044A • F01
Figure 1. Switched-Capacitor Building Block
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.
Rewriting in terms of voltage and impedance equivalence,
V1 – V2
1/(f × C1)
V1 – V2
EQUIV
I =
=
R
A new variable, REQUIV, has been defined such that REQUIV
= 1/(f × C1). Thus, the equivalent circuit for the switched-
capacitor network is as shown in Figure 2.
5
LTC1044A
O U
W
U
PPLICATI
A
S
I FOR ATIO
+
V
(8)
SW1
SW2
+
C
(2)
BOOST
φ
φ
+
7X
C1
(1)
OSC
÷2
–
OSC
(7)
C
V
OUT
(5)
(4)
C2
+
LTC1044A • F03
CLOSED WHEN
+
V
> 3V
LV
(6)
GND
(3)
Figure 3. LTC1044A Switched-Capacitor Voltage Converter Block Diagram
LV (Pin 6)
frequency will decrease output impedance and ripple for
higher load currents.
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.
Loading pin 7 with more capacitance will lower the fre-
quency. Using the boost (pin 1) in conjunction with exter-
nal 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 0.5µA) 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).
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
6I
I
+
V
BOOST
(1)
100k
REQUIRED FOR
TTL LOGIC
1
2
3
4
8
7
6
5
NC
OSC INPUT
LTC1044A
+
C1
SCHMITT
TRIGGER
+
OSC
(7)
–(V )
C2
~14pF
+
LTC1044A • F05
6I
I
LV
(6)
LTC1044A • F04
Figure 5. External Clocking
Figure 4. Oscillator
6
LTC1044A
O U
W
U
PPLICATI
A
S I FOR ATIO
Capacitor Selection
The exact expression for output resistance is extremely
complex, butthedominanteffectofthecapacitorisclearly
shown on the typical curves of Output Resistance and
Power Efficiency vs Frequency. For C1 = C2 = 10µF, the
outputimpedancegoesfrom60ΩatfOSC =10kHzto200Ω
at fOSC = 1kHz. As the 1/(f × C) term becomes large
compared to the switch-on resistance term, the output
resistance is determined by 1/(f × C) only.
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.
Voltage Doubling
Figure 7 shows a two-diode capacitive voltage doubler.
Witha5Vinput, theoutputis9.93Vwithnoloadand9.13V
with a 10mA load. With a 10V input, the output is 19.93V
with no load and 19.28V with a 10mA load.
V
IN
(1.5V TO 12V)
1
2
3
4
8
7
6
5
The output voltage (pin 5) characteristics of the circuit are
thoseofanearlyidealvoltagesourceinserieswithan80Ω
resistor. The 80Ω output impedance is composed of two
terms:
+
V
d
V
d
1N5817
LTC1044A
1N5817
+
V
= 2(V – 1)
IN
OUT
REQUIRED
FOR V < 3V
+
+
+
10µF
10µF
LTC1044A • F07
1. The equivalent switched-capacitor resistance (see
Theory of Operation).
Figure 7. Voltage Doubler
2. A term related to the on-resistance of the MOS
switches.
Atanoscillatorfrequencyof10kHzandC1=10µF, thefirst
Ultra-Precision Voltage Divider
term is:
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
R
=
=
EQUIV
(f /2) × C1
OSC
1
= 20Ω
3
–6
1
2
3
4
8
7
6
5
+
5 × 10 × 10 × 10
V
(3V TO 24V)
LTC1044A
+
Notice that the above equation for REQUIV is not a capaci-
tive reactance equation (XC = 1/ωC) and does not contain
a 2π term.
C1
10µF
LTC1044A • F08
+
V /2 ±0.002%
REQUIRED FOR
+
1
2
3
4
8
7
6
5
+
+
C2
10µF
V
< 6V
T
I
≤ T ≤ T
MIN A MAX
≤ 100nA
V
(1.5V TO 12V)
L
LTC1044A
+
+
10µF
REQUIRED FOR V < 3V
+
Figure 8. Ultra-Precision Voltage Divider
V
= –V
OUT
10µF
+
LTC1044A • F06
T
≤ T ≤ T
A MAX
MIN
Figure 6. Negative Voltage Converter
7
LTC1044A
O U
W
U
PPLICATI
A
S I FOR ATIO
Battery Splitter
(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.
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 sym-
metrical ± output voltages, both equal to one half input
voltage. The output voltages are both referenced to pin 3
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 × C1), increas-
ing the capacitor size (C1) or increasing the frequency will
be of more benefit than the paralleling circuit shown.
1
2
3
4
8
7
6
5
+V /2 (6V)
B
+
V
B
LTC1044A
+
12V
C1
10µF
REQUIRED FOR V < 6V
B
+V /2 (–6V)
B
Figure 11 makes use of “stacking” two LTC1044As to
provide even higher voltages. A negative voltage doubler
ortriplercanbeachieved,dependinguponhowpin8ofthe
second LTC1044A is connected, as shown schematically
bytheswitch. Theavailableoutputcurrentwillbedictated/
decreased by the product of the individual power conver-
sion efficiencies and the voltage step-up ratio.
LTC1044A • F09
C2
+
10µF
OUTPUT
COMMON
Figure 9. Battery Splitter
+
V
1
2
8
7
6
5
1
2
3
4
8
7
6
5
+
LTC1044A
+
LTC1044A
3
4
C1
C1
10µF
10µF
+
V
= –(V )
OUT
1/4 CD4077
*
C2
+
20µF
LTC1044A • F10
*THE EXCLUSIVE NOR GATE SYNCHRONIZES BOTH LTC1044As TO MINIMIZE RIPPLE
Figure 10. Paralleling for Lower Output Resistance
+
V
+
+
FOR V
= –3V
FOR V
= –2V
OUT
OUT
1
2
3
4
8
7
6
5
1
2
8
7
6
5
10µF
+
+
LTC1044A
LTC1044A
3
4
10µF
+
–(V )
V
OUT
10µF
10µF
+
+
LTC1044A
• F11
Figure 11. Stacking for Higher Voltage
8
LTC1044A
U
TYPICAL APPLICATIO S
Low Output Impedance Voltage Converter
200k
8.2k
V
IN
*
V
OUT
3
2
7
50k
+
ADJ
6
LM10
OUTPUT
8
1
7
6
5
4
39k
+
1
–
10µF
100µF
+
8
4
50k
LTC1044A
200k
39k
LTC1044 • F12
0.1µF
2
3
10µF
+
*V
≥
–V
+ 0.5V
OUT
IN
LOAD REGULATION ±0.02%, 0mA TO 15mA
Single 5V Strain Gauge Bridge Signal Conditioner
1
2
3
4
8
7
6
5
5V
LTC1044A
+
100µF
100µF
–5V
4
+
220Ω
8
0.33µF
3
2
+
OUTPUT
0V TO 3.5V
0psi to 350psi
1
1.2V REFERENCE TO
A/D CONVERTER FOR
RATIOMETRIC OPERATION
(1mA MAX)
D
2k
GAIN
TRIM
–
100k
0.047µF
46k*
LT1413
10k
ZERO
TRIM
301k*
A
LT1004
1.2V
350Ω PRESSURE
TRANSDUCER
100Ω*
E
5
6
0V
+
–
7
39k
*1% FILM RESISTOR
PRESSURE TRANSDUCER BLH/DHF-350
(CIRCLED LETTER IS PIN NUMBER)
C
≈ –1.2V
0.1µF
LTC1044A • F13
9
LTC1044A
U
TYPICAL APPLICATIO S
Regulated Output 3V to 5V Converter
3V
1N914
200Ω
1
2
3
4
8
7
6
5
5V
OUTPUT
+
100µF
LTC1044A
1M
1
+
4.8M
10µF
7
–
+
8
1k
REF
AMP
330k
EVEREADY
EXP-30
LM10
–
+
2
3
1k
6
OP
AMP
4
100k
1N914
150k
LTC1044A • F14
Low Dropout 5V Regulator
2N2219
V
= 5V
OUT
1N914
200Ω
10µF
1
2
3
4
8
7
6
5
12V
+
LTC1044A
+
10µF
100Ω
120k
100k
SHORT-CIRCUIT
PROTECTION
8
+
5
FEEDBACK AMP
1M
6V
V
LOAD
4 EVEREADY
E-91 CELLS
2
3
+
–
–
+
7
LT1013
1N914
–
V
4
1
6
LT1004
1.2V
30k
50k
OUTPUT
ADJUST
1.2k
V
V
V
AT 1mA = 1mV
AT 10mA = 15mV
AT 100mA = 95mV
DROPOUT
DROPOUT
DROPOUT
0.01Ω
LTC1044A • F15
10
LTC1044A
U
Dimensions in inches (millimeters) unless otherwise noted.
PACKAGE DESCRIPTIO
N8 Package
8-Lead Plastic DIP
0.400
(10.160)
MAX
8
7
6
5
4
0.250 ± 0.010
(6.350 ± 0.254)
1
2
3
0.130 ± 0.005
0.300 – 0.320
0.045 – 0.065
(3.302 ± 0.127)
(1.143 – 1.651)
(7.620 – 8.128)
0.065
(1.651)
TYP
0.009 – 0.015
(0.229 – 0.381)
0.125
0.020
(0.508)
MIN
(3.175)
MIN
+0.025
0.045 ± 0.015
(1.143 ± 0.381)
0.325
–0.015
+0.635
8.255
(
)
–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)
7
5
8
6
0.150 – 0.157
(3.810 – 3.988)
0.228 – 0.244
(5.791 – 6.197)
1
3
4
2
0.010 – 0.020
(0.254 – 0.508)
× 45°
0.053 – 0.069
(1.346 – 1.752)
0.004 – 0.010
(0.101 – 0.254)
0.008 – 0.010
(0.203 – 0.254)
0°– 8° TYP
0.016 – 0.050
0.406 – 1.270
0.050
(1.270)
BSC
0.014 – 0.019
(0.355 – 0.483)
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 represen-
tationthattheinterconnectionofitscircuitsasdescribedhereinwillnotinfringeonexistingpatentrights.
11
LTC1044A
U.S. Area Sales Offices
SOUTHWEST REGION
Linear Technology Corporation
22141 Ventura Blvd.
SOUTHEAST REGION
Linear Technology Corporation
17060 Dallas Parkway
Suite 208
Dallas, TX 75248
Phone: (214) 733-3071
FAX: (214) 380-5138
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
Suite 206
Woodland Hills, CA 91364
Phone: (818) 703-0835
FAX: (818) 703-0517
NORTHWEST REGION
Linear Technology Corporation
782 Sycamore Dr.
CENTRAL REGION
Linear Technology Corporation
Chesapeake Square
Linear Technology Corporation
266 Lowell St., Suite B-8
Wilmington, MA 01887
Milpitas, CA 95035
Phone: (408) 428-2050
FAX: (408) 432-6331
229 Mitchell Court, Suite A-25
Addison, IL 60101
Phone: (708) 620-6910
FAX: (708) 620-6977
Phone: (508) 658-3881
FAX: (508) 658-2701
International Sales Offices
KOREA
FRANCE
Linear Technology Korea Branch
Namsong Building, #505
Itaewon-Dong 260-199
Yongsan-Ku, Seoul
Korea
TAIWAN
Linear Technology S.A.R.L.
Immeuble "Le Quartz"
58 Chemin de la Justice
92290 Chatenay Malabry
France
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
Phone: 82-2-792-1617
FAX: 82-2-792-1619
Phone: 33-1-41079555
FAX: 33-1-46314613
SINGAPORE
UNITED KINGDOM
GERMANY
Linear Technology Pte. Ltd.
101 Boon Keng Road
#02-15 Kallang Ind. Estates
Singapore 1233
Linear Technology (UK) Ltd.
The Coliseum, Riverside Way
Camberley, Surrey GU15 3YL
United Kingdom
Linear Technology GMBH
Untere Hauptstr. 9
D-85386 Eching
Germany
Phone: 65-293-5322
FAX: 65-292-0398
Phone: 44-276-677676
FAX: 44-276-64851
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
World Headquarters
Linear Technology Corporation
1630 McCarthy Blvd.
Milpitas, CA 95035-7487
Phone: (408) 432-1900
FAX: (408) 434-0507
08/16/93
LT/GP 1293 10K REV 0 • PRINTED IN USA
LINEAR TECHNOLOGY CORPORATION 1993
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7487
12
●
●
(408) 432-1900 FAX: (408) 434-0507 TELEX: 499-3977
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