Series
PFM (Frequency)Controlled, Step-Up DC/DC Converters
NPager
Use
NDuty
Ratio
NCMOS
Structure
: Low Noise
: 75%
: Small Supply
■Applications
GPagers
GPalmtops
GCameras,
Video cameras
GVarious
portable products
Current
NOperating
Voltage Range : 0.9~10.0V
NOutput
Voltage Range
: 2.0~7.0V
NOutput
Voltage Accuracy : ±2.5%
4
■Features
Low noise
Operating voltage range
: 0.9V~10V
Output voltage range
: 2.0V~7.0V (programmable in 0.1V
steps)
Output voltage accuracy:
±2.5%
Maximum oscillator frequency
: 100kHz (±15%)
Built-in switching transistor
CE function and/or separated V
DD
/V
OUT
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)
■General Description
The XC6385 series are a group of PFM (frequency) controlled step-up
DC/DC converters.
The XC6385 series employs CMOS process and laser trimming
technologies to attain low power and high accuracy.
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.)
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 V
DD
pin
function (separated power supply and voltage detect pins) for fly-back
circuits.
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.
■ 端子配列
XC6385A
■Pin Configuration
XC6385C/E
XC6385C/E
V
OUT
L
X
V
SS
XC6385A
V
SS
L
X
5
4
3
SOT-23
(TOP VIEW)
5
4
SOT-89
(TOP VIEW)
SOT-89-5
(TOP VIEW)
SOT-25
(TOP VIEW)
1
V
SS
2
L
X
1
2
3
CE/V
OUT
V
OUT
/V
DD
NC
1
V
SS
2
V
OUT
3
L
X
1
NC
2
3
V
OUT
/V
DD
CE/V
OUT
525
XC6385
Series
■Product Classification
GSelection
Guide
PARAT
TYPE
XC6385A
DUTY
RATIO
75%
PACKAGE
SOT-23
SOT-89
SOT-23
SOT-89-5
SWITCHING
CE
TRANSISTOR FUNCTION
Built-in
NO
V
DD
PIN
NO
FEATURES
Duty Ratio 75%
Stand-by (CE) function
During stand-by (CE pin "Low"),
Supply current = 0.50µA (max)
Since the power supply (V
DD
) pin and the
voltage sensor (V
OUT
) pin are separated,
use as a PFM controller is possible.
XC6385C
75%
Built-in
YES
NO
XC6385E
75%
SOT-23
SOT-89-5
Built-in
NO
YES
4
GOrdering
Information
XC6385qwerty
XC6385 Series
A
q
C
E
w
e
r
1
M
t
P
y
R
L
Package
PFM Controlled Duty 75%
3-pin. Built-in switching transistor
Stand-by capability. (5-pin) Built-in switching transistor
Stand-by capability. (5-pin) Built-in switching transistor
Output Voltage
e.g.V
OUT
=3.5V
➔
w=3, e=5
Maximum Oscillator Frequency
Package
q=A
q=C,
E
q=A
q=C,
E
100kHz
SOT-23
SOT-25
SOT-89
SOT-89-5
Embossed tape: Standard Feed
Embossed tape: Reverse Feed
526
XC6385
Series
■Marking
q w e r
qwer
w
q
r
e
2
1
4
3
SOT-23
(TOP VIEW)
SOT-25
(TOP VIEW)
SOT-89
(TOP VIEW)
SOT-89-5
(TOP VIEW)
q
Represents the Product Classification
DESIGNATOR
E
L
N
−
CE
V
DD
/V
IN
FUNCTION
Built-in Transistor
Built-in Transistor
Built-in Transistor
PRODUCT NAME
XC6385A＊＊＊＊＊
XC6385C＊＊＊＊＊
XC6385E＊＊＊＊＊
w
Represents the integer of the Output Voltage and Oscillator Frequency
INTEGER OF THE OUTPUT VOLTAGE
1
2
3
4
5
6
7
OSCILLATOR FREQUENCY
（kHz）
4
100
1
2
3
4
5
6
7
e
Represents the decimal number of the Output Voltage and Oscillator Frequency
OUTPUT VOLTAGE
0
1
2
3
4
5
6
7
8
9
OSCILLATOR FREQUENCY
（kHz）
100
0
1
2
3
4
5
6
7
8
9
r
Denotes the production lot number
0 to 9, A to Z repeated(G.I.J.O.Q.W excepted)
529
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