PFM (Frequency)Controlled, Step-Up DC/DC Converters
Series
525
4
General Description
Features
Applications
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.
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.
Typical Application Circuit
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)
GPagers
GPalmtops
GCameras, Video cameras
GVarious portable products
NPager Use
: Low Noise
NDuty Ratio
: 75%
NCMOS Structure
: Small Supply
Current
NOperating Voltage Range: 0.9~10.0V
NOutput Voltage Range
: 2.0~7.0V
NOutput Voltage Accuracy: 2.5%
3
2
1
1
2
3
1
2
3
XC6385A
V
OUT
V
SS
V
SS
V
OUT
L
X
V
OUT
/V
DD
CE/V
OUT
L
X
V
SS
V
SS
L
X
CE/V
OUT
V
OUT
/V
DD
NC
NC
L
X
XC6385C/E
XC6385A
XC6385C/E
5
4
3
2
1
4
5
SOT-23
(TOP VIEW)
SOT-25
(TOP VIEW)
SOT-89
(TOP VIEW)
SOT-89-5
(TOP VIEW)
Pin Configuration
04S_11XC6385 02.09.12 14:59 525
XC6385
Series
526
4
Product Classification
GSelection Guide
GOrdering Information
PARAT
TYPE
XC6385A
XC6385C
XC6385E
75%
75%
75%
Built-in
Built-in
Built-in
NO
YES
NO
NO
NO
YES
Duty Ratio 75%
Stand-by (CE) function
During stand-by (CE pin "Low"),
Supply current = 0.50
A (max)
Since the power supply (V
DD
) pin and the
voltage sensor (V
OUT
) pin are separated,
use as a PFM controller is possible.
SOT-23
SOT-89
SOT-23
SOT-89-5
SOT-23
SOT-89-5
DUTY
RATIO
PACKAGE
SWITCHING
TRANSISTOR
CE
FUNCTION
V
DD
PIN
FEATURES
P
R
L
A
C
E
1
3-pin. Built-in switching transistor
Stand-by capability. (5-pin) Built-in switching transistor
Stand-by capability. (5-pin) Built-in switching transistor
Maximum Oscillator Frequency 100kHz
Output Voltage
e.g.V
OUT
=3.5V
w=3, e=5
M
Package
q=A
SOT-23
q=C, E
SOT-25
Package
q=A
SOT-89
q=C, E
SOT-89-5
Embossed tape: Standard Feed
Embossed tape: Reverse Feed
XC6385 Series
PFM Controlled Duty 75%
XC6385qwerty
q
w
e
r
t
y
04S_11XC6385 02.09.12 14:59 526
XC6385
Series
529
4
SOT-89
(TOP VIEW)
q
w
e
r
2
1
4
3
SOT-89-5
(TOP VIEW)
Marking
SOT-23
(TOP VIEW)
q w e r
SOT-25
(TOP VIEW)
q w e r
w Represents the integer of the Output Voltage and Oscillator Frequency
1
100
OSCILLATOR FREQUENCYkHz
INTEGER OF THE OUTPUT VOLTAGE
1
5
4
3
2
r Denotes the production lot number
0 to 9, A to Z repeated(G.I.J.O.Q.W excepted)
2
3
4
5
7
7
6
6
e Represents the decimal number of the Output Voltage and Oscillator Frequency
100
OSCILLATOR FREQUENCYkHz
OUTPUT VOLTAGE
0
9
8
7
6
1
5
4
3
2
0
9
8
7
6
1
5
4
3
2
q Represents the Product Classification
FUNCTION
N
L
E
DESIGNATOR
-
CE
V
DD
/V
IN
PRODUCT NAME
XC6385A
XC6385C
XC6385E
Built-in Transistor
Built-in Transistor
Built-in Transistor
04S_11XC6385 02.09.12 14:59 529
PDF 
ZIP
