LTC1144CS8 Linear Technology, LTC1144CS8 Datasheet - Page 4

• Manufacturer Part Number: LTC1144CS8
• Description: IC VOLT CONV SW-CAP W/SHTDN8SOIC
• Manufacturer: Linear Technology
• Type: Switched Capacitor (Charge Pump), Invertingr

Specifications of LTC1144CS8

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Current - Output: 50mA
• Frequency - Switching: 4kHz ~ 10kHz
• Voltage - Input: 2 ~ 18 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Power - Output: 500mW
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Voltage - Output: -

TYPICAL PERFORMANCE CHARACTERISTICS
PI FU CTIO S
LTC1144
4
Boost (Pin 1): This pin will raise the oscillator frequency
by a factor of 10 if tied high.
CAP
GND (Pin 3): Ground Reference.
CAP
V
OUT
1500
1000
500
100
U
80
60
40
20
0
0
+
0.01
–
Power Conversion Efficiency and
Supply Current vs Load Current
0
Ripple Voltage vs Load Current
(Pin 5): Output of the Converter.
(Pin 2): Positive Terminal for Pump Capacitor.
(Pin 4): Negative Terminal for Pump Capacitor.
V
T
C1 = C2
P
A
+
EFF
= 25°C
= 5V
BOOST = 5V
BOOST =
OPEN
U
4
0.1
LOAD CURRENT (mA)
LOAD CURRENT (mA)
8
0.1 F
I
S
1
U
1 F
T
V
C1 = C2 = 10 F
BOOST = OPEN
(SEE TEST CIRCUIT)
A
+
12
= 25°C
= 5V
0.1 F
10
W
16
LTC1144 • TPC13
LTC1144 • TPC10
1 F
10 F
10 F
U
100
20
50
40
30
20
10
0
–3
–4
–5
–1
–2
0
0.001
100
Output Voltage vs Load Current
95
90
85
80
75
70
V
T
C1 = C2
A
+
0.1
Power Conversion Efficiency
vs Oscillator Frequency
= 25°C
100 F
= 5V
BOOST = 5V
BOOST = OPEN
0.01
100 F
OSCILLATOR FREQUENCY (kHz)
LOAD CURRENT (mA)
10 F
10 F
0.1
0.1 F
1
SHDN (Pin 6): Shutdown Pin. Tie to V
for normal operation. Tie to ground when in shutdown
mode.
OSC (Pin 7): Oscillator Input Pin. This pin can be overdriven
with an external clock or can be slowed down by connect-
ing an external capacitor between this pin and ground.
V
1 F
+
1
(Pin 8): Input Voltage.
1 F
1 F
0.1 F 10 F
T
BOOST = OPEN
A
= 25°C, V
I
L
10
= 20mA
10
1 F
LTC1144 • G14
LTC1144 • TPC11
10 F
I
L
= 3mA
+
100
= 15V
100
3000
2000
1000
–10
–15
–5
0.001
0
0
0.1
Output Resistance
vs Oscillator Frequency
Output Voltage vs Load Current
T
V
V
T
C1 = C2
A
+
100 F
A
+
10 F
= 25°C
= 15V
= 25°C
= 15V
BOOST = 15V
BOOST = OPEN
0.01
OSCILLATOR FREQUENCY (kHz)
LOAD CURRENT (mA)
1
+
0.1
pin or leave floating
1 F
0.1 F
1
10
0.1 F
LTC1144 • TPC12
10
LTC1144 • TPC15
1 F
10 F
1 F
10 F
100
100