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LTC1144 Datasheet(PDF) 5 Page - Linear Technology

Part # LTC1144
Description  Switched-Capacitor Wide Input Range Voltage Converter with Shutdown
PDF  12 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC1144 Datasheet(HTML) 5 Page - Linear Technology

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LTC1144
5
1144fa
For more information www.linear.com/LTC1144
Typical perForMance characTerisTics
Ripple Voltage vs Load Current
Output Voltage vs Load Current
Output Voltage vs Load Current
Power Conversion Efficiency and
Supply Current vs Load Current
Power Conversion Efficiency
vs Oscillator Frequency
Output Resistance
vs Oscillator Frequency
Boost (Pin 1): This pin will raise the oscillator frequency
by a factor of 10 if tied high.
CAP+ (Pin 2): Positive Terminal for Pump Capacitor.
GND (Pin 3): Ground Reference.
CAP– (Pin 4): Negative Terminal for Pump Capacitor.
VOUT (Pin 5): Output of the Converter.
SHDN (Pin 6): Shutdown Pin. Tie to V+ pin or leave float-
ing for normal operation. Tie to ground when in shutdown
mode.
OSC(Pin7):OscillatorInputPin.Thispincanbeoverdriven
with an external clock or can be slowed down by connect-
ing an external capacitor between this pin and ground.
V+ (Pin 8): Input Voltage.
LOAD CURRENT (mA)
0
60
80
100
16
LTC1144 • TPC10
40
20
0
30
40
50
20
10
0
4
8
12
20
PEFF
IS
TA = 25°C
V+ = 5V
C1 = C2 = 10µF
BOOST = OPEN
(SEE TEST CIRCUIT)
LOAD CURRENT (mA)
0.01
0
500
1000
1µF
1µF
1500
0.1
1
LTC1144 • TPC13
10
100
0.1µF
10µF
10µF
V+ = 5V
TA = 25°C
C1 = C2
BOOST = 5V
BOOST =
OPEN
0.1µF
OSCILLATOR FREQUENCY (kHz)
0.1
70
90
95
100
1
10
100
LTC1144 • TPC11
85
80
75
TA = 25°C, V+ = 15V
BOOST = OPEN
IL = 20mA
IL = 3mA
1µF
1µF
10µF
10µF
100µF
100µF
LOAD CURRENT (mA)
–4
–3
–2
–1
0
0.001
0.1
1
100
LTC1144 • G14
–5
0.01
10
0.1µF
0.1µF 10µF
10µF
1µF
1µF
V+ = 5V
TA = 25°C
C1 = C2
BOOST = 5V
BOOST = OPEN
OSCILLATOR FREQUENCY (kHz)
0.1
0
2000
3000
1
10
100
LTC1144 • TPC12
1000
1µF
10µF
100µF
TA = 25°C
V+ = 15V
LOAD CURRENT (mA)
–10
–5
0
0.001
0.1
1
100
LTC1144 • TPC15
–15
0.01
10
V+ = 15V
TA = 25°C
C1 = C2
BOOST = 15V
0.1µF
0.1µF
1µF
1µF
10µF
10µF
BOOST = OPEN
pin FuncTions



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