Impala Linear Corporation ILC6301 Datasheet

ILC6301

100mA DC/DC Converter With KeepAlive™ Output

Impala Linear Cor poration

Impala Linear Corporation

1

[phone]

www.impalalinear.com

Feb 2001

ILC6301 1.1

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 pri­mary load while maintaining power regulation to a second­ary load that must remain continuously active. Termed
“KeepAlive™” (KA), this feature can supply auxiliary power
to serial port receivers, command receivers or control sen­sors (i.e. IR, RF) while holding other system blocks in stand­by or power-down mode. Main and KA™ outputs are user
selected via the SEL pin. Overall device control is accom­plished 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 gen­erate 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 VDD> 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.

• 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 requiresa 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

• 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

ILC6301

V

DD

C

byp

On/Off

SELect

V

SS

20µF

20µF

Flag Out

V

OUT MAIN

V

OUT KA

L

X

Advance

General Description

Features

Applications

Typical Circuit

Pin Name

V

DD

V

SS

V

OUT MAIN

V

OUT

KeepAlive

On/Off

Select

Flag

L

X

Pin Number

TBD
TBD
TBD
TBD

TBD
TBD

TBD

TBD

Pin Description

Input voltage. i.e. Battery. Positive Relative to V

SS

Common, Ground
Main output voltage. Output bypass capacitor connection
KA output voltage. Output bypass capacitor connection
Digital input activates device. 1 = ON, 0 = OFF

Can be tied to V

DD

Digital input, mode select. 1= Normal, 0 = KeepAlive
Digital Output. Indicates low battery status
Connection for inductor. (inductor returns to VDD)

Can be tied to V

DD

Driver-

Control

SWITCHER

KEEP ALIVE

Driver-

Control

SW_OUT

KA_OUT

L

X

Thermal

Input

Control

ON/OFF

SEL

FLAG

KA_ON

Switcher_ON

Phase

Control

Mode

V-REG

V

ref

OSC

V

SS

V

DD

100mA DC/DC Converter With KeepAlive™ Output

Advance

Impala Linear Corporation

2

[phone]

www.impalalinear.com

Feb 2001

ILC6301 1.1

Pin Description ILC6301

Functional Block Diagram