04S_11XC6385 02.09.12 14:59 ページ 525
Series
PFM (Frequency)Controlled, Step-Up DC/DC Converters
NPager Use
: Low Noise
: 75%
■Applications
GPagers
NDuty Ratio
GPalmtops
NCMOS Structure
: Small Supply
Current
GCameras, Video cameras
GVarious portable products
NOperating Voltage Range: 0.9~10.0V
NOutput Voltage Range : 2.0~7.0V
4
NOutput Voltage Accuracy: 2.5%
■General Description
The XC6385 series are a group of PFM (frequency) controlled step-up
DC/DC converters.
■Features
Low noise
Operating voltage range : 0.9V~10V
The XC6385 series employs CMOS process and laser trimming
technologies to attain low power and high accuracy.
Output voltage range
: 2.0V~7.0V (programmable in 0.1V
steps)
A common problem among pagers is one of noise, but with the XC6385,
high frequency noise that occurs during switching is reduced.
Output voltage is selectable in 0.1V steps within 2.0V ~ 7.0V and
maximum frequency is 100kHz (Typ.)
Output voltage accuracy: 2.5%
Maximum oscillator frequency
: 100kHz ( 15%)
Built-in switching transistor
With a built-in switching transistor, a step-up circuit can be configured
using a coil, diode and capacitor connected externally.
Also available is a CE (chip enable) function that reduces power
consumption during shut-down mode, and an independent VDD pin
function (separated power supply and voltage detect pins) for fly-back
circuits.
CE function and/or separated VDD/VOUT types selectable with
5 pin packages
Small package
: SOT-23/25 mini-mold (3pin, 5pin)
SOT-89/89-5 mini-power mold
(3 pin, 5 pin)
SOT-89-5 and SOT-23/25 small packages.
■Typical Application Circuit
■Electrical Characteristics
For typical application circuit and electrical characteristics of XC6385 series, please refer to that of XC6382 series.
For more detail, please contact Torex sales offices or sales person.
■Pin Configuration
XC6385C/E
XC6385A
XC6385C/E
XC6385A
VSS
LX
5
4
VOUT
LX
VSS
3
5
4
SOT-89�
(TOP VIEW)�
�
SOT-89-5�
(TOP VIEW)
SOT-23�
(TOP VIEW)
SOT-25�
(TOP VIEW)�
�
1
2
1 2 3
CE/VOUT VOUT/VDD NC
1
NC
2 3
VOUT/VDD CE/VOUT
1
2
3
X
V
SS
L
X
V
SS
V
OUT
L
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