Power ILC6390 Technical data

V

OUT

V

DD

V

REF

4~5mV

+

+

-

-

2-STEP PFM

CONTROLLED OSC

100/155kHz

VLX LIMITER

BUFFER

V

SS

L

X

EXT

CE

CHIP ENABLE

50 mA boost converter using Pulse Frequency Modulation,
or PFM, technique, in 5-lead SOT-89 or a 5-lead SOT-23
package. Only 3 external components are needed to com­plete the switcher design.

The ILC6390 automatically senses load variations to choose
between 55% and 75% duty cycles. Normal operation is 55%
duty at 155kHz; when load currents exceed the internal com­parator trip point, a “turbo mode” kicks in to provide extend­ed on-time switching (75% duty at 100kHz oscillation).

Requiring only 30µA of supply current, the ILC6390
achieves efficiencies as high as 85% at 5V yet shuts down
to 0.5µA max.

Standard voltages offered are 2.5, 3.3, and 5.0V and is
available in both a 5 lead SOT-23 and 5 lead SOT-89 pack­age for small footprint applications.

In addition, the ILC6391 is configured to drive an external
transistor to achieve higher power levels.

ILC6390/91

SOT-89 Step-Up PFM Switcher
with Auto-Load Sense

Impala Linear Cor poration

Impala Linear Corporation

1

[phone]

www.impalalinear.com

Feb 2001

ILC6390 1.1

• 85% conversion efficiency at 50mA out

• Start-up voltages as low as 900mV

• ±2.5% accurate outputs

• Complete switch design with only 3 external components

• Automatically senses load variations to select the optimal
duty cycle and extend conversion efficiencyover a wide
range

• External transistor configuration to run as switcher

controller

• Shutdown to 0.5µA

• Cellular phones, pagers

• Cameras, video recorders

• Palmtops and PDAs

ILC6390CM

ILC6390CP

54

123

SOT-25

(TOP VIEW)

L

X

V

SS

CE VDDN/C

V

SS

L

X

SOT-89-5

(TOP VIEW)

54

123

N/C V

OUT

CE

ILC6391CM

54

123

SOT-25

(TOP VIEW)

L

X

V

SS

CE VDDN/C

ILC6391CP

V

SS

L

X

SOT-89-5

(TOP VIEW)

54

123

N/C V

OUT

CE

Block Diagram

Pin-Package Configurations

ILC6390CM-25

2.5V ± 2.5%
ILC6390CM-33

3.3V ± 2.5%
ILC6390CM-50

5.0V ± 2.5%
ILC6391CM-25

3.3V ± 2.5% driving external transistor
ILC6391CM-33

3.3V ± 2.5% driving external transistor
ILC6391CM-50

5.0V ± 2.5% driving external transistor
ILC6390CP-25

2.5V ± 2.5%
ILC6390CP-33

3.3V ± 2.5%
ILC6390CP-50

5.0V ± 2.5%
ILC6391CP-25

3.3V ± 2.5% driving external transistor
ILC6391CP-33

3.3V ± 2.5% driving external transistor
ILC6391CP-50

5.0V ± 2.5% driving external transistor

* Standard product offering comes in tape & reel, quantity 3000 per
reel, orientation right for SOT-25, quantity 1000 per reel orientation
right for SOT-89.

General Description Features

Applications

Ordering Information

查询ILC6390供应商查询ILC6390供应商

SOT-89 Step-Up PFM Switcher with Auto-Load Sense

Impala Linear Corporation

2

[phone]

www.impalalinear.com

Feb 2001

ILC6390 1.1

Parameter

Symbol

Ratings

Units

V

OUT

Input Voltage

V

OUT

12

V

Voltage on pin L

X

VLX 12

V

Current on pin L

X

ILX 400

mA

Voltage on pin EXT

V

EXT

VSS-0.3~V

OUT

+0.3

V

Current on pin EXT

I

EXT

±50

mA

CE Input Voltage

V

CE

12

V

V

DD

Input Voltage

V

DD

12

V

Continuous Total Power Dissipation

PD (SOT-25)
P

D

(SOT-89)

150
500

mW

Operating Ambient Temperature

T

opr

-30~+80

°C

Storage Temperature

T

stg

-40~+125

°C

Parameter

Symbol

Conditions

Min

Typ

Max

Units

Output Voltage

V

OUT

Test Circuit of Figure 1

4.875

5.000

5.125

V

Input Voltage

V

IN

10

V

Oscillation Startup Voltage

V

ST

I

OUT

= 1mA

0.80

0.9

V

Oscillation Hold Voltage

V

HLD

I

OUT

= 1mA

0.70

V

NO-Load Input Current

I

IN

I

OUT

= 0mA (See Note 1)

5.3

10.6

µA

Supply Current 1 (See Note 2)

IDD 1

V

OUT

= 4.75V

31.7

63.4

µA

Supply Current 2

IDD 2

V

OUT

= 5.5V

2.4

4.8

µA

LX Switch-On Resistance

R

SWON

V

OUT

= 4.75V, VLX = 0.4

2.8

4.3

Ω

LX Leakage Current

I

LXL

No external components, V

OUT

=

VL

X

= 10V

1.0

µA

Duty Ratio 1

DUTY 1

V

OUT

= 4.75V, Measuring of LX

waveform

70

75

80

%

Duty Ratio 2

DUTY 2

V

OUT

= 4.75V, Measuring of LX

on-time

50

55

60

%

Maximum Oscillation Freq. 1

MFO 1

V

OUT

= 4.75V, 75% duty

85

100

115

kHz

Maximum Oscillation Freq. 2

MFO 2

V

OUT

= 4.75V, 55% duty

153

180

207

kHz

Stand = by Current

I

STB

V

OUT

= 4.75V

0.5

µA

CE “High” Voltage

V

CEH

V

OUT

= 4.75V, Existance of LX

Oscillation

0.75

V

CE “Low” Voltage

V

CEL

V

OUT

= 4.75V, Disappearance of

L

X

Oscillation

0.20

V

CE “High” Current

I

CEH

VCE = V

OUT

x 0.95

0.25

µA

CE “Low” Current

I

CEL

V

OUT

= 4.75V, VCE = 0V

-0.25

µA

LX Limit Voltage

V

LXLMT

V

OUT

= 4.75V, fosc > MFO x 2

(See Note 3)

0.7 1.1

V

Note:

1. The Schottky diode (S.D.), in figure 3 must be type MA735, with Reverse current (IR) < 1.0µA at reverse voltage (VR)=10.0V

2. “Supply Current 1” is the supply current while the oscillator is continuously oscillating. In actual operation the oscillator periodically operates which
results in less average power consumption.
The current that is actually provided by external V

IN

source is represented by “No-Load Input Current”

3. The switching frequency is determined by the delay time of the internal comparator and MFO1, which sets the min. on-time

Absolute Maximum Ratings (TA= 25°C)

Electrical Characteristics ILC6390

V

OUT

= 5.0V TA= 25°C. Unless otherwise specified, VIN= V

OUT

x 0.6, I

OUT

= 50mA. See schematic, fig. 3.

SOT-89 Step-Up PFM Switcher with Auto-Load Sense

Impala Linear Corporation

3

[phone]

www.impalalinear.com

Feb 2001

ILC6390 1.1

Parameter

Symbol

Conditions

Min

Typ

Max

Units

Output Voltage

V

OUT

Test Circuit of Figure 4

4.875

5.000

5.125

V

Input Voltage

V

IN

10

V

Operation Startup Voltage

V

ST

I

OUT

= 1mA

0.80

0.9

V

Operation Hold Voltage

V

ST

I

OUT

= 1mA

0.70

V

Supply Current 1 (See Note 1)

IDD 1

V

OUT

= 4.75V

31.7

63.4

µA

Supply Current 2

IDD 2

V

OUT

= 5.5V

2.4

4.8

µA

EXT “High” On-Resistance

R

EXTH

V

OUT

= 4.75V, V

EXT

= V

OUT

-0.4

50

75

Ω

EXT “Low” On-Resistance

R

EXTL

V

OUT

= 4.75V, V

EXT

= 0.4

50

75

Ω

Duty Ratio 1

DUTY 1

V

OUT

= 4.75V, Measuring of

EXT waveform

70

75

80

%

Duty Ratio 2

DUTY 2

VIN = V

OUT

x 0.95, I

OUT

= 1mA,

Measuring of EXT High State

50

55

60

%

Maximum Oscillation Freq. 1

MFO 1

V

OUT

= 4.75V, 75% duty

85

100

115

kHz

Maximum Oscillation Freq. 2

MFO 2

VIN = V

OUT

x 0.95, 55% duty

153

180

207

kHz

Stand = by Current

I

STB

V

OUT

= 4.75V

0.5

µA

CE “High” Voltage

V

CEH

V

OUT

= 4.75V, Existence of

EXT Oscillation

0.75

V

CE “Low” Voltage

V

CEL

V

OUT

= 4.75V, Disappearance

of EXT Oscillation

0.20

V

CE “High” Current

I

CEH

VCE = V

OUT

= 4.75V

0.25

µA

CE “Low” Current

I

CEL

V

OUT

= 4.75V, V

CE

= 0V

-0.25

µA

Efficiency

EFFI

Test Circuit Figure 4

85 %

Note:

1. “Supply Current 1” is the supply current while the oscillator is continuously oscillating. In actual operation the oscillator periodically operates
which results in less average power consumption.

Electrical Characteristics ILC6391

V

OUT

= 5.0V TA = 25°C. Unless otherwise specified, V

IN

= V

OUT

x 0.6, I

OUT

= 50mA. See schematic, Fig.4