ILC6301 Datasheet, PDF (1/6 Pages) Impala Linear Corporation – 100mA DC/DC CONVERTER WITH KEEPALIVE OUTPUT

Impala Linear Corporation
ILC6301 ^Advance
100mA DC/DC Converter With KeepAlive™ Output
General Description
Features
The ILC6301 series of DC-DC converters represents an
advanced generation of energy resource management IC’s
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
“KeepAlive™” (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™ 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.
• Selectable Main (to 100mA) or KeepAlive™ (to 10mA)
voltage outputs
• Input voltage operating range 1.8V to 6.0V
• 3.0V or 3.3V fixed output voltages (custom
requirements contact Impala)
• Internal controlled synchronous operation requires no
external diode
• Optimized design requires a minimum of external components
One inductor and three capacitors
• Low power OFF mode, < 1µA @ V_DD = 1.8V
• Internal oscillator frequency ~ 210kHz ±15%
• Condition Flag output
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™ 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.
Applications
• Portable and battery operated systems
• Remote data collection terminals
• Designs requiring continuous communications receive
port monitoring
• Systems requiring continuous sensor activation for
event specific detection
• Security devices
• Low duty cycle, NLS medical instrumentation
Typical Circuit
V_DD
C_byp
On/Off
SELect
V_SS
L_X
ILC6301
20µF
20µF
V_{OUT MAIN}
V_{OUT KA}
Flag Out
Impala Linear Corporation
ILC6301 1.1
[phone] www.impalalinear.com
Feb 2001 1