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Torex Semiconductor

XC9215 Datasheet Preview

XC9215 Datasheet

(XC9215 - XC9217) 500mA Synchronous Step-Down DC/DC Converters

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Synchronous Step-Down DC/DC
High Efficiency
:92%
Low Ripple Voltage
:10mV
Output Current
:500mA
(VIN=3.0V, VOUT=1.8V)*
Oscillation Frequency
www.DataSheet4PU.WcomM Fixed Control
:600kHz, 1.2MHz
:(XC9215 series)
PWM/PFM Automatic Switching Control :(XC9216 series)
Manual Selection of Switching Control :(XC9217 series)
Maximum Duty Ratio
:100%
Ceramic Capacitor Compatible
Ultra Small Packages
:SOT-25, USP-6B
GENERAL DESCRIPTION
The XC9215/9216/9217 series is a group of synchronous-rectification
type DC/DC converters with a built-in 0.6 P-channel driver transistor
and 0.7 N-channel switching transistor, designed to allow the use of
ceramic capacitors. The ICs enable a high efficiency, stable power
supply with an output current of 500mA to be configured using only a
coil and two capacitors connected externally.
Minimum operating voltage is 2.0V. Output voltage is internally
programmable in a range from 0.9V to 4.0V in increments of 100mV
(accuracy: 2.0%).
With the built-in oscillator, oscillation frequency is selectable from
600kHz and 1.2MHz to make available the frequency best suited to
your particular application.
As for operation mode, the XC9215 series is PWM control, the XC9216
series is automatic PWM/PFM switching control and the XC9217 series
can be manually switched between the PWM control mode and the
automatic PWM/PFM switching control mode, allowing fast 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 standby, 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. Two types of package,
SOT-25 (250mW) and USP-6B (100 mW), are available.
TYPICAL APPLICATION CIRCUIT
VIN
CIN
(ceramic)
CE/MODE
1 VIN
Lx 5
2 VSS
3
CE/
MODE
VOUT
4
L
VOUT
(500mA)
CL
(ceramic)
GO-Compatible
APPLICATIONS
Mobile phones (PDC, GSM, CDMA, IMT200 etc.)
Bluetooth equipment
PDAs
Portable communication modem
Portable games
Cameras
Digital cameras
Cordless phones
Notebook computers
FEATURES
P-ch Driver Tr. Built-in
:ON resistance 0.6
N-ch
Synchronous Driver Tr. Built-in:ON resistance 0.7
Input Voltage Range
:2.0 ~ 6.0V
Output Voltage Range
:0.9V~4.0V (100mV increments)
High Efficiency
:92% (TYP.)
(VIN=3.0V, VOUT=1.8V,
IOUT=100mA)*
Output current
:500mA
(VIN=3.0V, VOUT=1.8V)*
Oscillation Frequency
:600kHz, 1.2MHz
(Fixed frequency accuracy 15%)
Ultra Small Packages
:SOT-25
USP-6B
Soft-start circuit built-in
Current limiter circuit built-in (constant current & latching)
Low ESR ceramic capacitor compatible
* Performance depends on external components and
wiring on the PCB.
TYPICAL PERFORMANCE
CHARACTERISTICS
Effciency vs. Output Current
XC9217A18C
100 L=3.3 H(CDRH3D16), CIN=4.7 F(ceramic), CL=10 F(ceramic), T opr=25
90
80
70
60
50 VIN=5.0V
40 VIN=3.6V
30 VIN=2.7V
20
10
0
0.1
PWM /PFM Automatic Switching Control
PWM Control
1 10 100
Output Current:IOUT(mA)
1000
679




Torex Semiconductor

XC9215 Datasheet Preview

XC9215 Datasheet

(XC9215 - XC9217) 500mA Synchronous Step-Down DC/DC Converters

No Preview Available !

XC9215/9216/9217 Series
PIN CONFIGURATION
SOT-25 (TOP VIEW)
www.DataSheet4U.com
USP-6B (BOTTOM VIEW)
* Please short the VSS pin (pin no. 2 and 5) before use.
Please use the circuit without connecting the heat
dissipation pad. If the pad must be connected due to
a problem of heat dissipation or mounting intensity,
connect to the VSS pin (pin no. 5).
PIN CONFIGURATION
PIN NUMBER
SOT-25 USP-6B
16
2 2, 5
34
43
51
PIN NAME
VIN
VSS
CE / MODE
VOUT
Lx
FUNCTION
Power Input
Ground
Chip Enable / Mode Switch
Output Voltage Sense
Switching Output
PRODUCT CLASSIFICATION
Ordering Information
XC9215
XC9216
XC9217
PWM fixed control
PWM / PFM automatic switching control
PWM fixed control PWM / PFM automatic switching, manual switching
DESIGNATOR
DESCRIPTION
Type of DC/DC Converter
Transistor Built-In, Output
Voltage Internally Set
(VOUT Product), Soft Start
Internally Set, Current Limit
700mA
Output voltage
SYMBOL
A
B
C
D
09 ~ 40
DESCRIPTION
: CE input logic High Active, CE pin open (Standard)
: CE input logic Low Active, CE pin open (Semi-custom)
: CE input logic High Active, Pull-down resistor built-in (Semi-custom)
:CE input logic Low Active, Pull-up resistor built-in (Semi-custom)
: 100mV increments
e.g. VOUT = 1.5V
= 1, = 5
Oscillation Frequency
Package
Device Orientation
6 : 600kHz
C : 1.2MHz
M : SOT-25 (SOT-23-5)
D : USP-6B
R : Embossed tape, Standard feed
L : Embossed tape, Reverse feed
680


Part Number XC9215
Description (XC9215 - XC9217) 500mA Synchronous Step-Down DC/DC Converters
Maker Torex Semiconductor
Total Page 21 Pages
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