LTC3290
High Voltage Boost
Charge Pump
FEATURES
DESCRIPTION
The LTC®3290 is a high voltage boost charge pump with
a wide 4.5V to 55V input voltage range that can deliver
up to 50mA of output current.
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Wide Input Range: 4.5V to 55V V /V
IN AUX
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n
n
n
n
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n
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Reverse Input Protection to –55V
Split Input Supplies for High Efficiency Boost Ratios
I
Up to 50mA
OUT
When the V
pin is grounded, the LTC3290 operates
SET
15µA V Quiescent Current
IN
as a standard boost charge pump, boosting the V
OUT
1µA V
Quiescent Current
AUX
output to a maximum of the sum of the V and V
IN
AUX
Stable with Ceramic Capacitors
input supplies. An external resistor divider can be used
Short-Circuit/Thermal Protection
Thermally Enhanced 10-Pin MSOP Package
on the V , FB and GND pins to set the output voltage
OUT
to any value between 1V and V + V
Burst Mode operation.
with hysteretic
IN
AUX
APPLICATIONS
Alternatively,thedevicecanbeconfiguredinaV tracking
IN
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High Efficiency General Purpose High Voltage Boost
mode, in which the V
pin regulates at a fixed offset
OUT
Supplies
above the V pin. The offset voltage is programmed with
IN
n
High Side N-FET Driver
external resistors, one from the V
to the V pin and
OUT
SET
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Industrial/Automotive Power Switching
the other from the FB pin to GND. The maximum output
n
V Tracking Supply
IN
voltage is limited to V + V
.
AUX
IN
The LTC3290 is available in a thermally enhanced 10-pin
MSOP package.
All registered trademarks and trademarks are the property of their respective owners.
TYPICAL APPLICATION
15V Output from a 12V Input (with 5V Auxiliary Input)
Standard Boost Charge Pump Mode, VSET = 0V
Efficiency vs Output Current
ꢑ0
ꢒ0
ꢖ0
ꢓ0
ꢗ0
ꢔ0
ꢘ0
ꢕ0
ꢄꢋꢌ
ꢕꢙ
ꢕꢘ
ꢄꢅꢀ
ꢅꢀ
ꢀ
ꢀ
ꢀ
ꢁꢂꢃ
ꢇꢂꢛ
ꢜꢒ
0ꢆꢇ ꢃꢁ ꢈ0ꢆꢇ
ꢄ0ꢋꢌ
ꢄ0ꢋꢌ
ꢄ0ꢋꢌ
ꢔꢃꢕꢖꢈꢗ0
ꢄ.ꢉꢊ
ꢄꢈꢀ
ꢀ
ꢎꢏꢃ
ꢌꢐ
ꢈ
ꢈ
ꢈ
ꢜ ꢙꢕꢈ
ꢜ ꢗꢈ
ꢂꢄ
ꢏꢒ
ꢙ0
0
ꢎꢊꢏ
ꢉꢊꢋ
ꢜ ꢙꢗꢈ
ꢐꢜꢇꢎ
ꢚꢑꢁꢁꢓ
ꢄ00ꢍ
ꢑꢒꢓ
ꢉ.ꢝꢋꢌ
ꢖꢈꢗ0 ꢃꢇ0ꢄ
0.0ꢙ
0.ꢙ
ꢙ
ꢙ0 ꢕ0
ꢂ
ꢆꢚꢎꢐ
ꢉꢊꢋ
ꢘꢕꢑ0 ꢋꢎ0ꢙꢛ
Rev. 0
1
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