Datasheet ILC6301 Datasheet (Impala Linear Corporation)

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

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Feb 2001

ILC6301 1.1

Pin Description ILC6301

Functional Block Diagram

Symbol

V

OUT, MAIN

V

OUT, KA

-

P

D

T

J(MAX)

T

STG

θ

JA, SOIC

θ

JA, SOIC

Symbol

V

DD

F

O

V

ref

I

OFF

V

mode

Parameter

Voltage on Main V

OUT

pin

Voltage on KA V

OUT

pin

All other pins Ref to V

SS

Continuous Power Dissipation under ANY condition

Maximum Junction Temperature
Storage Temperature
Lead Temperature. Soldering 10 sec
Package Thermal Resistance - SOIC
Package Thermal Resistance - MSOP

Ratings

-0.3 to 7

-0.3 to 7

-0.3 to 7
400

150

-40 to 125
300
154
206

Units

V
V
V

mA

°C
°C

°C

°C/W
°C/W

Electrical Characteristics ILC6301

Parameter

Input Voltage
Switch Frequency
Reference Voltage
OFF Mode Current

Switcher to Chop mode threshold

Thermal Shutdown

Min

1.8

180

3.6

142

Typ

200

1.217

150

Max

6.0

240

1µA

3.8

163

Units

V

kHz

V

µA

V

°C

Comment

V

IN

Trimmed to center
Trimmed Tol. TBD
VIN= 1.8. OFF mode active
V

IN

where SW to Chop or Chop to

SW mode change occurs
Hysteresis ~ 20°C

General and Common Parameters

Parameter

SEL Logic 1
SEL Logic 0
ON/OFF Logic 1
ON/OFF Logic 0

Symbol

V

IH

V

IL

V

IH

V

IL

Min

1.4

1.4

Typ Max

0.5

0.5

Units

V
V
V
V

Comment

Switcher is selected
KeepAlive is selected
Normal operation
Stand-by operation

Input Parameters

100mA DC/DC Converter With KeepAlive™ Output

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ILC6301 1.1

Absolute Maximum Ratings

Symbol

V

OUT

I

O(MAX)

I

O(MIN)

V

R

EFF

Units

µH
µF

µF

µF

Value

10
20

20

20 (or user TBD)

Parameter

Out Voltage
Output Current, max

Input Current, min

Ripple at max load
Conversion Efficiency

Symbol

V

OUT

I

O(MAX)

I

O(MIN)

V

R

EFF

Min

10

48

Typ

3 or 3.3

Max

100

60
86

Units

V

mA

mA

mV

%

Comment

Mask programmable
Short circuit limiting not enabled
Regulation and ripple percentage

Degrades slightly at lower I

OUT

LXand C

OUT

as recommended

Switcher Section Parameters

Parameter

Out Voltage
Output Current, max

Input Current, min

Ripple at max load
Conversion Efficiency

Min

1

Typ

3 or 3.3

85

Max

10

60

Units

V

mA
mA

mV

%

Comment

Fixed
Short circuit limiting not enabled
Regulation and ripple percentage

Degrades slightly at lower I

OUT

Coil and C

OUT

as recommended

KeepAlive Section Parameters

Switcher Section

Coil

Switch out capacitor

KeepAlive

Output capacitor

General

Input bypass capacitor

Recommended Components

Note: Customer may choose to optimize recommended values to suit a given application

100mA DC/DC Converter With KeepAlive™ Output

Advance

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Feb 2001

ILC6301 1.1

Electrical Characteristics ILC6301

V

DD

ILC6301

C

byp

On/Off

V

SS

20µF

20µF

Flag

Main

KA

L

X

System "ON"

Voltage

Activity Monitoring

System

S-Port, Sensors, etc.

Reset
µP

100mA DC/DC Converter With KeepAlive™ Output

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Feb 2001

ILC6301 1.1

Example Operation

Pin 1 identifier

0.197

0.190

0.155

0.150

0.244

0.228

0.069

0.053

0.011

0.004

0.060

0.040

0.019

0.013

0.050

0.016

0.012

0.009

0.8°

0.260

0.240

0.019

0.013

0.260

0.240

0.260

0.240

0.260

0.240

0.260

0.240

0.260

0.240

0.260

0.240

0.260

0.240

All dimensions in inches

8-Pin MSOP

8-Pin SOIC

100mA DC/DC Converter With KeepAlive™ Output

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Feb 2001

ILC6301 1.1

Package Dimensions