LTC1044AIN8#PBF Linear Technology, LTC1044AIN8#PBF Datasheet

IC CMOS VOLT CONV SW-CAP 8-DIP

LTC1044AIN8#PBF

Manufacturer Part Number
LTC1044AIN8#PBF
Description
IC CMOS VOLT CONV SW-CAP 8-DIP
Manufacturer
Linear Technology
Type
Step-Up (Boost), Switched Capacitor (Charge Pump), Divider, Doubler, Invertingr
Datasheet

Specifications of LTC1044AIN8#PBF

Internal Switch(s)
Yes
Synchronous Rectifier
No
Number Of Outputs
1
Current - Output
20mA
Frequency - Switching
1kHz ~ 5kHz
Voltage - Input
1.5 ~ 12 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Through Hole
Package / Case
8-DIP (0.300", 7.62mm)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Voltage - Output
-
Power - Output
-
FEATURE
A
TYPICAL
PPLICATI
1.5V to 12V Operating Supply Voltage Range
13V Absolute Maximum Rating
200 A 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
I
High Voltage Upgrade to ICL7660/LTC1044
Conversion of 10V to 10V Supplies
Conversion of 5V to 5V Supplies
Precise Voltage Division: V
Voltage Multiplication: V
Supply Splitter: V
Automotive Applications
Battery Systems with 9V Wall Adapters/Chargers
S
= 1.5 A with 5V Supply When OSC Pin = 0V or V
+
A
S
10 F
O
PPLICATI
Generating – 10V from 10V
U
OUT
1
2
3
4
S
BOOST
CAP
GND
CAP
= V
LTC1044A
+
OUT
LTC1044A • TA01
S
OUT
V
OSC
/2
OUT
O
V
LV
= nV
+
= V
U
8
7
6
5
IN
IN
+
/2 20ppm
10 F
10V INPUT
–10V OUTPUT
+
D
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 (V
(V
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 1.5 A at 5V input when the
OSC pin is tied to GND or V
OUT
ESCRIPTIO
= V
IN
–10
Output Voltage vs Load Current, V
–1
–2
–3
–4
–5
–6
–7
–8
–9
OUT
/2) or multiplied (V
0
0
T
C1 = C2 = 10 F
A
= – V
10 20 30
= 25°C
Voltage Converter
U
IN
LOAD CURRENT (mA)
), doubled (V
SLOPE = 45
40
50 60 70 80 90 100
+
.
OUT
12V CMOS
= nV
OUT
LTC1044A • TA02
LTC1044A
+
= 2V
IN
= 10V
).
IN
), divided
1

Related parts for LTC1044AIN8#PBF

LTC1044AIN8#PBF Summary of contents

Page 1

S FEATURE 1.5V to 12V Operating Supply Voltage Range 13V Absolute Maximum Rating 200 A 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 ...

Page 2

LTC1044A ABSOLUTE AXI U (Note 1) Supply Voltage ........................................................ 13V Input Voltage on Pins 1, 6 and 7 (Note 2) .............................. – 0.3V < V Current into Pin 6 ................................................. 20 A Output Short-Circuit Duration + V ...

Page 3

W U TYPICAL PERFOR A Operating Voltage Range vs Temperature –55 – 100 125 AMBIENT TEMPERATURE (°C) LTC1044A • TPC01 Output Resistance vs + Oscillator Frequency ...

Page 4

LTC1044A W U TYPICAL PERFOR A Output Resistance vs Supply Voltage 1000 T = 25° 3mA 100pF OSC 100 C = 0pF OSC ...

Page 5

TEST CIRCUIT + PPLICATI S I FOR ATIO A 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, ...

Page 6

LTC1044A PPLICATI S I FOR ATIO BOOST 7X (1) OSC (7) Figure 3. LTC1044A Switched-Capacitor Voltage Converter Block Diagram LV (Pin 6) The internal logic of the LTC1044A runs between (pin 6). For ...

Page 7

PPLICATI S I FOR ATIO A 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 ...

Page 8

LTC1044A PPLICATI S I FOR ATIO A Battery Splitter 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 ...

Page 9

TYPICAL APPLICATIO LM10 39k 2 – 4 50k *V –V IN OUT LOAD REGULATION ±0.02%, 0mA TO 15mA 220 1.2V REFERENCE TO A/D CONVERTER FOR RATIOMETRIC OPERATION (1mA MAX) 10k LT1004 ZERO 1.2V TRIM *1% FILM ...

Page 10

LTC1044A TYPICAL APPLICATIO S 3V 330k EVEREADY EXP-30 1N914 200 LTC1044A 100k EVEREADY 2 E-91 CELLS 3 LT1004 1.2k 1.2V 0. Regulated Output Converter 200 ...

Page 11

... 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- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. U Dimensions in inches (millimeters) unless otherwise noted ...

Page 12

... 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 World Headquarters Linear Technology Corporation 1630 McCarthy Blvd. ...

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