Impala Linear Corporation
ILC6301
Advance
100mA DC/DC Converter With KeepAlive鈩?Output
General Description
The ILC6301 series of DC-DC converters represents an
advanced generation of energy resource management IC鈥檚
for battery operated and portable systems. This device
series showcases the unique ability to power down a pri-
mary load while maintaining power regulation to a second-
ary load that must remain continuously active. Termed
鈥淜eepAlive鈩⑩€?(KA), this feature can supply auxiliary power
to serial port receivers, command receivers or control sen-
sors (i.e. IR, RF) while holding other system blocks in stand-
by or power-down mode. Main and KA鈩?outputs are user
selected via the SEL pin. Overall device control is accom-
plished with the use of the On/Off pin. Only one output is
active at any time.
Both outputs are fixed at either 3.0V or 3.3V. For economy
and efficiency, the architecture utilizes a single coil to gen-
erate each output. The Main output can supply up to 100mA
and the KeepAlive鈩?section can supply up to 10mA. Each
regulator performs buck or boost functions depending on
the value of V
DD
. At V
DD
> 3.7V automatic control invokes
chopper mode operation and for V
DD
< 3.7V automatic con-
trol invokes boost mode operation. The operating range for
V
DD
is 1.8V to 6V.
The ILC6301 is available in either the conventional SOIC-8
or the space saving MSOP-8 plastic packaging.
Features
鈥?Selectable Main (to 100mA) or KeepAlive鈩?(to 10mA)
voltage outputs
鈥?Input voltage operating range 1.8V to 6.0V
鈥?3.0V or 3.3V fixed output voltages (custom
requirements contact Impala)
鈥?Internal controlled synchronous operation requires no
external diode
鈥?Optimized design requires a minimum of external components
One inductor and three capacitors
鈥?Low power OFF mode, < 1碌A(chǔ) @ V
DD
= 1.8V
鈥?Internal oscillator frequency ~ 210kHz 鹵15%
鈥?Condition Flag output
Applications
鈥?Portable and battery operated systems
鈥?Remote data collection terminals
鈥?Designs requiring continuous communications receive
port monitoring
鈥?Systems requiring continuous sensor activation for
event specific detection
鈥?Security devices
鈥?Low duty cycle, NLS medical instrumentation
Typical Circuit
V
DD
C
byp
On/Off
ILC6301
SELect
L
X
V
OUT MAIN
20碌F
V
SS
V
OUT KA
Flag Out
20碌F
Impala Linear Corporation
ILC6301 1.1
(408) 574-3939
www.impalalinear.com
Feb 2001
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