LTC1144 Linear Technology, LTC1144 Datasheet - Page 2

• Manufacturer Part Number: LTC1144
• Description: Switched-Capacitor Wide Input Range Voltage Converter with Shutdown
• Manufacturer: Linear Technology

A
(Note 1)
Supply Voltage (V
Supply Voltage (V
Input Voltage on Pins 1, 6, 7
Output Short-Circuit Duration
Power Dissipation ............................................. 500mW
Operating Temperature Range
Storage Temperature Range ................. – 65 C to 150 C
Lead Temperature (Soldering, 10 sec).................. 300 C
LTC1144
2
V
SYMBOL PARAMETER
I
R
f
The
temperature range; all other limits and typicals at T
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
than ground may cause destructive latch-up. It is recommended that no
ELECTRICAL C
S
OSC
OUT
+
BSOLUTE
(Note 2) ............................ – 0.3V < V
V
V
V
LTC1144C................................................ 0 C to 70 C
LTC1144I ............................................ – 40 C to 85 C
= 15V, C
+
+
+
denotes specifications which apply over the full operating
10V .................................................... Indefinite
15V ........................................................ 30 sec
20V ............................................. Not Protected
Supply Voltage Range
Supply Current
Output Resistance
Oscillator Frequency
Power Efficiency
Voltage Conversion Efficiency
Oscillator Sink or Source Current V
OSC
= 0pF, T
W
+
+
) (Operating) ............................. 18V
) (Transient) .............................. 20V
A
A
= 25 C, Test Circuit Figure 1, unless otherwise noted.
HARA TERISTICS
XI
W
U
C
W
CONDITIONS
R
R
f
SHDN = 0V, R
No Connection
V
No Connection, f
V
Pins 1, 7 No Connection
V
V
V
V
R
R
V
OSC
L
L
L
L
+
+
+
+
+
+
+
+
= 10k
= , Pins 1, 6 No Connection,
= 2k at 10kHz
=
R
= 5V, R
= 5V, SHDN = 0V, R
= 15V, I
= 5V, I
= 15V (Note 3)
= 5V
= 5V (V
= 15V (V
A
= 10kHz
A
= 25 C.
IN
TI
L
< (V
L
OSC
L
= 3mA at 4kHz
OSC
= , Pins 1, 6
= 20mA at 10kHz
U
L
= 0V to 5V)
= , Pins 1, 7
G
+
= 0V to 15V)
OSC
) + 0.3V
+
or less
S
= 4kHz
L
= ,
Consult factory for Military grade parts.
inputs from sources operating from external supplies be applied prior to
power-up of the LTC1144.
Note 3: f
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.
PACKAGE/ORDER I FOR ATIO
BOOST
BOOST
CAP
CAP
CAP
CAP
GND
GND
OSC
T
T
+
–
+
–
JMAX
JMAX
97.0
MIN
90
2
is tested with C
1
2
3
4
8-LEAD PLASTIC SOIC
1
2
3
4
8-LEAD PLASTIC DIP
= 110°C,
= 110°C,
LTC1144C
N8 PACKAGE
S8 PACKAGE
TOP VIEW
TOP VIEW
0.008
0.002
99.9
TYP
0.5
56
90
10
93
4
4
JA
JA
= 100°C/W
= 130°C/W
0.015
MAX
0.03
0.10
0.13
OSC
100
120
250
1.1
1.3
18
8
7
6
5
8
7
6
5
= 100pF to minimize the effects of test
V
OSC
SHDN
V
V
OSC
SHDN
V
OUT
+
+
OUT
MIN
97.0
90
2
U
LTC1144I
S8 PART MARKING
0.008
0.002
99.9
TYP
0.5
90
10
93
56
4
4
ORDER PART
LTC1144CN8
LTC1144IN8
LTC1144CS8
LTC1144IS8
NUMBER
W
1144
1144I
0.035
0.018
MAX
0.10
0.15
300
100
140
1.1
1.6
18
UNITS
U
kHz
kHz
mA
mA
mA
mA
mA
mA
%
%
V
A
A