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Número de pieza | XC9217 | |
Descripción | (XC9215 - XC9217) 500mA Synchronous Step-Down DC/DC Converters | |
Fabricantes | Torex Semiconductor | |
Logotipo | ||
Hay una vista previa y un enlace de descarga de XC9217 (archivo pdf) en la parte inferior de esta página. Total 21 Páginas | ||
No Preview Available ! 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
1 page MARKING RULE (Continued)
USP-6B
XC9215/9216/9217
Series
USP-6B (TOP VIEW)
Mark Represents product series and type of DC/DC converter
www.DataSheet4U.coMmARK
PRODUCT SERIES
F XC9215A x x x D x
B XC9216A x x x D x
E XC9217A x x x D x
* Character inversion used.
Mark
Represents type of voltage regulators
MARK
PRODUCT SERIES
A XC92 x x A x x x D x
CURRENT LIMIT
700mA
Mark Represents integer of output voltage
OUTPUT VOLTAGE
MARK
(XC92 x x A x x D x)
0.X 0
1.X 1
2.X 2
3.X 3
4.X 4
Mark Represents integer of output voltage
OUTPUT VOLTAGE
MARK
(XC92 x x A x x D x)
X.0 0
X.1 1
X.2 2
X.3 3
X.4 4
X.5 5
X.6 6
X.7 7
X.8 8
X.9 9
* Output voltage 0.9V ~ 4.0V (100mV increments) are standard products.
Please ask our sales contact for output voltages of 50mV increments (semi-custom products).
Mark
Mark
Represents oscillation frequency
MARK
PRODUCT SERIES
6 XC92 x x A x x 6 D x
C XC92 x x A x x C D x
FREQUENCY
600kHz
1.2MHz
Represents production lot number
0 to 9, A to Z, reversed (G, I, J, O, Q, W excepted)
Note: No character inversion used.
683
5 Page XC9215/9216/9217
Series
NOTES ON USE (Continued)
Application Information (Continued)
Instructions on Pattern Layout
1. In order to stabilize VIN's voltage level, we recommend that a by-pass capacitor (CIN) be connected as
close as possible to the VIN & VSS pins.
2. Please mount each external component as close to the IC as possible.
3. Wire external components as close to the IC as possible and use thick, short connecting traces to
reduce the circuit impedance.
4. Make sure that the PCB GND traces are as thick as possible, as variations in ground potential caused
by high ground currents at the time of switching may result in instability of the IC.
www.DataSheet4U.com
Recommended Pattern Layout
SOT-25
L
VIN
CIN
VSS
VOUT
IC CL
Ceramic_Cap
Inductor
USP-6B
CE VSS
* Please use an electric wire for VIN, VOUT, VSS, and CE.
L
VOUT
CIN
IC
VIN
CE
VSS
VSS
* Please use an electric wire for VIN, VOUT, VSS, and CE.
Ceramic_Cap
Inductor
689
11 Page |
Páginas | Total 21 Páginas | |
PDF Descargar | [ Datasheet XC9217.PDF ] |
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