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ILC6383CIR-ADJ Datasheet

  • ILC6383CIR-ADJ

  • Analog IC

  • 11頁

  • ETC

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www.fairchildsemi.com
ILC6383
1-Cell to 3-Cell Boost with True Load Disconnect,
3.3V, 5V or Adjustable Output
Features
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0.9V to 6V input voltage
Guaranteed start up in PWM at 0.9V input
Synchronous rectification requires no external diode
True load disconnect from battery input in shutdown
Up to 75mA at 3.3V and 40mA at 5V from 1V input
Up to 375mA at 3.3V and 160mA at 5V from 3V input
Peak efficiency > 90%
1碌A(chǔ) battery input current in shutdown (with V
OUT
= 0V)
Internal Oscillator frequency: 300kHz to 鹵15%
ILC6383: Fixed 3.3V or 5V output
ILC6383-ADJ: Adjustable output to 6V maximum
Low battery detector with 100ms transient rejection delay
Powergood output flag when V
OUT
is in regulation
Description
The ILC6383 series of step-up DC-DC converters operate
from 1-cell to 3-cell input. They are direct replacement for
ILC6382, in applications where SYNC pin is not used. The
PFM or PWM operating mode is user selectable through
SEL pin connected to ground or left open, respectively. The
choice should be dependent upon the current to be delivered
to the load: PFM is recommended for input voltage higher
than 1.5V and loads below 100mA, while PWM is
recommended for more than 50mA load current In shutdown
mode, the device allows true load disconnect from battery
input. Designed for wireless communications applications,
the oscillator frequency is set at 300kHz with no harmonics
at sub 20kHz audio band or at 455kHz IF band.
Internal synchronous rectification and externally selectable
PFM/PWM mode of operation allows the selection of the
best efficiency at light or full load. The ILC6383 is capable
of delivering 75mA at 3.3V output from a single cell input.
The ILC6383-XX offers 3.3V or 5V fixed output voltage
while the ILC6383-ADJ allows adjustable output voltage to
6V maximum. Output voltage accuracy is 鹵2% over
specified temperature range.
Additional features include power good output (POK) and an
internal low battery detector with 100ms transient rejection
delay. The device will reject low battery input transients
under 100ms in duration. The ILC6383 series is available in
a space saving eight lead micro SOP (MSOP-8) package.
Applications
鈥?Cellular Phones, Pagers
鈥?Palmtops, PDAs and portable electronics
鈥?High efficiency 1V step up converters
Typical Applications
C
IN
47碌F
L
+
15碌H
1
2
R5
3
ILC6383-XX
L
X
V
IN
LBI/SD
SEL
V
OUT
GND
LBO
POK
C
IN
47碌F
L
+
15碌H
1
2
R5
3
ILC6383-ADJ
L
X
V
IN
LBI/SD
SEL
V
OUT
GND
8
7
6
5
+
V
IN
1 to 3-cell
47碌F
C
OUT
V
OUT
V
IN
1 to 3-cell
8
7
6
5
+
C
OUT
47碌F
V
OUT
ON
OFF
R6
4
Low Battery
Detector Output
Power Good Output
R1
LBO
V
FB
ON
OFF
R6
4
MSOP-8
PWM
PFM
PWM
PFM
R2
MSOP-8
V
OUT
= 1.25 (1+R1/R2)
Figure 1: ILC6383CIR-XX
Figure 2: ILC6383CIR-ADJ
Rev. 1.2
漏2001 Fairchild Semiconductor Corporation

ILC6383CIR-ADJ相關(guān)型號(hào)PDF文件下載

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