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Torex Semiconductor

XC9206 Datasheet Preview

XC9206 Datasheet

(XC9206 - XC9208) PWM/PFM Switchable Step-Down DC/DC Converters

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XC9206/XC9207/XC9208 Series
ETR0503_002
PWM, PWM / PFM Switchable Step-Down
DC / DC Converters With Driver Transistor Built-In
GO-Compatible
GENERAL DESCRIPTION
The XC9206/XC9207/XC9208 series is a group of DC/DC converters with a built-in 0.4 P-channel driver transistor, offered
in a SOT-25 package. The ICs are designed to provide high efficiencies and a stable power supply with an output current of
500mA using only a coil, a diode and two ceramic capacitors connected externally.
Minimum operating voltage of the XC9206/9207 is 1.8V and 2.0V for XC9208. Output voltage is internally programmable in
a range from 0.9V to 4.0V in 100mV increments (accuracy: ±2.0%). Oscillation frequency is selectable from 300kHz, 600kHz
and 1.2MHz so that the frequency best suited to your particular application can be selected. Each series features different
operation modes: PWM control (XC9206 series), automatic PWM/PFM switching control (XC9207 series) and manual
PWM/PFM switching control (XC9208 series). The series gives fast transient response, low ripple and high efficiency over
the full range of load (from light load to high output current conditions). The soft start and current control functions are
internally optimized. During stand-by, all circuits are shutdown to reduce current consumption to as low as 1.0 A or less.
With the built-in U.V.L.O. (Under Voltage Lock Out) function, the internal P-channel driver transistor is forced OFF when input
voltage becomes 1.4V or lower.
APPLICATIONS
Mobile phones
(PDC, GSM, CDMA, IMT2000 etc.)
PDAs, Portable communication modems
Portable games
Cameras, digital cameras
Cordless phones
Note book computers
FEATURES
P-ch driver Tr. Built-in : ON resistance 0.4
Output Voltage Range : 0.9V ~ 4.0V
(100mV increments)
Fixed output voltage accuracy ±2%
Oscillation Frequency : 300kHz, 600kHz, 1.2MHz
Fixed oscillation frequency
Accuracy ±15%
Stand-by function
: Istb = 1 A (MAX.)
Current Limiter built-in
: 600mA
Input Voltage Range
: 1.8V ~ 6.0V(XC9206/XC9207)
2.0V ~ 6.0V (XC9208)
Output Current
: 500mA
Maximum Duty Ratio
: 100%
PWM/PFM Switching Control (XC9207 / XC9208)
Ceramic Capacitor Compatible
Soft start circuit built-in
Small Package
: SOT-25
TYPICAL APPLICATION CIRCUIT
CE/MODE
4
CE/ VOUT
MODE
3
VSS 2
VIN
5 VIN
Lx 1
CIN
(ceramic)
L
SD
VOUT
(500mA)
CL
(ceramic)
L :4.7 F (CDRH 3D16,SUMIDA)
SD :CRS02 (SCHOTTKY DIODE,TOSHIBA)
CL :10 F (ceramic)
CIN :4.7 F (ceramic)
TYPICAL PERFORMANCE
CHARACTERISTICS
Efficiency vs. Output Current
XC9208A18C
VOUT=1.8V (Oscillation Frequency 1.2MHz)
CIN:4.7 F,CL:10 F, L:4.7 H(CDRH3D16),
100
90
80
70
PWM/PFM
Switching Control
SD:CRS02, Topr=25
VIN=2.4V
60 3.6V
50
40
30 PWM Control
4.2V
20
10
0
0.1 1
10 100 1000
Output Current IOUT (mA)
1/16




Torex Semiconductor

XC9206 Datasheet Preview

XC9206 Datasheet

(XC9206 - XC9208) PWM/PFM Switchable Step-Down DC/DC Converters

No Preview Available !

XC9206/XC9207/XC9208 Series
PIN CONFIGURATION
VIN CE/MODE
Lx
VSS
VOUT
SOT-25
(TOP VIEW)
PIN ASSIGNMENT
PIN NUMBER PIN NAME
FUNCTION
1 LX Switching Output
2 VSS
Ground
3
VOUT
Output Voltage Sense
4 CE/MODE Chip Enable/Mode Switch
5 VIN
Power Input
PRODUCT CLASSIFICATION
Ordering Information
XC9206
XC9207
XC9208
: PWM Control
: PWM / PFM Automatic Switching Control
: PWM Control, PWM / PFM Automatic Switching Control Manually Selectable
DESIGNATOR
DESCRIPTION
Type of DC/DC Converter
Output Voltage
SYMBOL
A
09~40
09~40 & L
DESCRIPTION
: 600mA current limiter, Transistor built-in, output voltage
internally set (VOUT product), soft start internally set.
: 100mV increments
e.g. VOUT=1.5V =1, =5
: 1.85V VOUT
2.85V VOUT
=1, =L
=2, =L
3 : 300kHz
Oscillation Frequency
6 : 600kHz
C : 1.2MHz
Package
Device Orientation
M : SOT-25 (SOT-23-5)
R : Embossed tape, standard feed
L : Embossed tape, reverse feed
* Output voltage 0.9V ~ 4.0V (100mV increments), 1.85V and 2.85V are standard products.
Output voltage other than these are available as semi-custom products.
2/16


Part Number XC9206
Description (XC9206 - XC9208) PWM/PFM Switchable Step-Down DC/DC Converters
Maker Torex Semiconductor
Total Page 16 Pages
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