Datasheet

2
LTC1044A
WU
U
PACKAGE
/
O
RDER I FOR ATIO
ABSOLUTE AXI U RATI GS
WWW
U
(Note 1)
Supply Voltage ........................................................ 13V
Input Voltage on Pins 1, 6 and 7
(Note 2) .............................. –0.3V < V
IN
< V
+
+ 0.3V
Current into Pin 6 ................................................. 20µA
Output Short-Circuit Duration
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
ORDER PART
NUMBER
T
JMAX
= 110°C, θ
JA
= 100°C/W
ORDER PART
NUMBER
1
2
3
4
8
7
6
5

TOP VIEW
BOOST
CAP
+

GND
CAP
–
V
+

OSC
LV
V
OUT
N8 PACKAGE
8-LEAD PLASTIC DIP
S8 PART MARKING
LTC1044ACN8
LTC1044AIN8
LTC1044ACS8
LTC1044AIS8
1044A
1044AI
T
JMAX
= 110°C, θ
JA
= 130°C/W
1
2
3
4
8
7
6
5
TOP VIEW
V
+

OSC
LV
V
OUT
BOOST
CAP
+

GND
CAP
–
S8 PACKAGE
8-LEAD PLASTIC SOIC
LTC1044AC LTC1044AI
SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
I
S
Supply Current R
L
= ∞, Pins 1 and 7, No Connection 60 200 60 200 µA
R
L
= ∞, Pins 1 and 7, No Connection, 15 15 µA
V
+
= 3V
Minimum Supply Voltage R
L
= 10k ● 1.5 1.5 V
Maximum Supply Voltage R
L
= 10k ● 12 12 V
R
OUT
Output Resistance I
L
= 20mA, f
OSC
= 5kHz 100 100 Ω
● 120 130 Ω
V
+
= 2V, I
L
= 3mA, f
OSC
= 1kHz ● 310 325 Ω
f
OSC
Oscillator Frequency V
+
= 5V, (Note 3) ● 5 5 kHz
V
+
= 2V ● 1 1 kHz
P
EFF
Power Efficiency R
L
= 5k, f
OSC
= 5kHz 95 98 95 98 %
Voltage Conversion Efficiency R
L
= ∞ 97 99.9 97 99.9 %
Oscillator Sink or Source V
OSC
= 0V or V
+
Current Pin 1 (BOOST) = 0V ● 33µA
Pin 1 (BOOST) = V
+
● 20 20 µA
E
LECTR
IC
AL C CHARA TERIST
ICS
V
+
= 5V, C
OSC
= 0pF, T
A
= 25°C, See Test Circuit, unless otherwise noted.
The ● denotes specifications which apply over the full operating
temperature range; all other limits and typicals T
A
= 25°C.
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: f
OSC
is tested with C
OSC
= 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.
Consult factory for Military grade parts