Fairchild ILC6363 Data Handbook
Summary
The ILC6363 is a high-efficiency DC-DC step-up/step-down converter designed for robust power management from single Lithium-ion batteries. It supplies regulated voltage up to 500mA, featuring selectable PWM/PFM modes and built-in low battery detection. This manual provides comprehensive specifications, pin assignments, and circuit configurations necessary for integrating the controller into portable electronics like cellular phones, PDAs, and any equipment requiring stable, efficient power management across fluctuating input voltages.
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ILC6363 Step-Up DC-DC Converter for One-Cell Lithium-Ion Batteries
Features voltage exceeds the output voltage by more than 800m V, the output will begin to track the input linearly.
ILC6363CIR-50: Fixed 5.0V output; custom voltages are available upon request
The ILC6363 is a direct replacement for ILC6360, in appli-
ILC6363CIR-ADJ: Adjustable output to 6V maximum
cations where SYNC pin is not used. The PFM or PWM
Capable of 500m A output current
operating mode is user selectable through SEL pin connected
Peak efficiency: > 90% at V OUT = 3.6V, I OUT = 300m A,
to ground or left open, respectively. The choice should be
IN = 3.6V
dependent upon the current to be delivered to the load: PFM
No external diode is required (synchronous rectification)
is recommended for better efficiency at light load,while
Battery input current of 300µA at no load
PWM is recommended for more than 50m A load current.
True load disconnect from battery input in shutdown
In shutdown mode, the device allows true load disconnect
from battery input.
Oscillator frequency: 300k Hz ±15% Low battery detector with 100ms transient rejection delay
Configured as a 300k Hz, fixed frequency PWM/PFM boost
Power good output flag when V OUT is in regulation
converter, the ILC6363 can perform a limited buck operation
MSOP-8 package
in PFM mode, when the input voltage is up to 0.8V higher than the output voltage.
Applications
The ILC6363 is unconditionally stable with no external
Cellular phones IL ffi ci en cy
compensation; the sizes of the input and output capacitors
Palmtops, PDAs and portable electronics
influence input and output ripple voltages, respectively.
Equipment using single Lithium-Ion batteries
Since the ILC6363 has an internal synchronous rectifier, the standard fixed voltage version requires minimal external
Description components: an inductor, an input capacitor, and an output
capacitor. If a tantalum output capacitor is used, then an
The ILC6363 step-up/step-down DC-DC converter is a
additional 10µF ceramic output capacitor will help reduce
switch mode converter, capable of supplying up to 500m A
output ripple voltage.
output current, at a fixed or user selectable output voltage. The range of input, and output voltage options makes the
Other features include a low battery input detector with a
ILC6363 ideal for Lithium-ion (Li-ion), or any other battery
built-in100ms transient rejection delay and a power good
application, where the input voltage range spans above and
indicator useful as a system power on reset.
below the regulated output voltage. When ILC6363’s input
at te ry ol ta ge
Typical Circuit
ILC6363CIR-XX Optimized to Maximize Battery Life
VOUT1
LX VOUT
VIN GND
2.7V to 4.2V
Low Battery 3.6
ON LBI/SD LBO
Detector Output
OFF R6
SEL POK Power Good Output
(Fixed VOUT only) 3.0
MSOP-8
Figure 1.
REV. 1.3.5 5/21/02
Page Summary Contents For Fairchild ILC6363 Data Handbook
Manual Details
| Brand | Fairchild |
|---|---|
| Pages | 14 |
| File Size | 158.49 KB |
| Published | May 31, 2026 |
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Frequently Asked Questions
What is the primary function of the ILC6363?
It's a step-up/step-down DC-DC converter ideal for portable electronics and Li-ion batteries, supplying up to 500mA.
How can I adjust the output voltage?
For adjustable versions (ILC6363CIR-ADJ), use external resistors connected to pin 5 (FB) to set the desired voltage.
What is the Power Good signal useful for?
The POK signal goes high when the regulated output voltage is stable, allowing it to be used as a system power-on reset indicator.
How does the device handle low battery conditions?
It includes an LBO detection pin (pin 3) that triggers a shutdown and sets pin 6 (LBO) low if the battery voltage falls below the set threshold.