LT3464_1 Datasheet, PDF (1/16 Pages) Linear Technology – Micropower Boost Converter with Schottky and Output Disconnect in ThinSOT™

FEATURES
s _{Tiny Solution Size}
s _{Low Quiescent Current}
• 25µA in Active Mode
• 0.5µA in Shutdown Mode
s _{Internal 115mA, 36V Switch}
s _{Integrated Schottky Diode}
s _{Integrated PNP Output Disconnect with}
Short-Circuit Protection
s _{Internal Reference Override Pin}
s _{16V at 8mA from 3.6V Input}
s _{12V at 20mA from 5V Input}
s _{Input Range: 2.3V to 10V}
s _{High Output Voltage: Up to 34V}
s _{Low Profile (1mm) SOT-23 Package}
U
APPLICATIO S
s _{OEL Panel Bias}
s _{LCD Bias}
s _{Handheld Computers}
s _{Battery Backup}
s _{Digital Cameras}
s _{Cellular Phones}
LT3464
Micropower Boost
Converter with Schottky and
Output Disconnect in ThinSOT™
DESCRIPTIO
The LT^®3464 is a micropower step-up DC/DC converter
with integrated Schottky diode and output disconnect
packaged in an 8-lead low profile (1mm) SOT-23. The
small package size, high level of integration, and the use
of tiny SMT components yield a solution size of less than
40mm². The LT3464 has a typical current limit of 115mA
as well as fast switching speed to allow the use of a chip
inductor and small ceramic capacitors. The internal PNP
disconnects the output load from the input during shut-
down, and also provides output short-circuit protection.
An auxiliary reference input allows the user to override the
internal 1.25V feedback reference with any lower value,
allowing full control of the output voltage during opera-
tion. This device features a low 25µA quiescent current,
which is further reduced to less than 0.5µA in shutdown.
A current limited fixed off-time control scheme conserves
operating current, resulting in high efficiency over a broad
range of operating current. The rugged 36V switch and
output disconnect circuitry allow outputs up to 34V to be
easily generated in a simple boost topology.
, LTC and LT are registered trademarks of Linear Technology Corporation.
ThinSOT is a trademark of Linear Technolgy Corporation
TYPICAL APPLICATIO
V_IN
2.3V TO 10V
1µF
22µH
V_IN
SW
OUT
CTRL
LT3464 CAP
SHDN
FB
GND
0.22µF
V_OUT
16V
0.33µF 3.48M
294k
3464 TA01a
90
80
70
60
50
40
30
0.01
Efficiency
V_IN = 8.4V
V_IN = 4.2V
0.1
1
10
LOAD CURRENT (mA)
100
3634 TA01b
3464f
1