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XC9217B27CML

Description
Switching Regulator/Controller
CategoryPower/power management    The power supply circuit   
File Size1MB,21 Pages
ManufacturerTOREX
Websitehttp://www.torex.co.jp/chinese/
Environmental Compliance
Download Datasheet Parametric View All

XC9217B27CML Overview

Switching Regulator/Controller

XC9217B27CML Parametric

Parameter NameAttribute value
Is it Rohs certified?conform to
Objectid104717636
package instruction,
Reach Compliance Codecompliant
ECCN codeEAR99
Humidity sensitivity level1
Peak Reflow Temperature (Celsius)260
☆GO-Compatible
◆Synchronous
Step-Down DC/DC
◆High
Efficiency
:92%
◆Low
Ripple Voltage
:10mV
◆Output
Current
:500mA
(VIN=3.0V, VOUT=1.8V)*
◆Oscillation
Frequency
:600kHz, 1.2MHz
◆PWM
Fixed Control
:(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
■APPLICATIONS
●Mobile
phones (PDC, GSM, CDMA, IMT200 etc.)
●Bluetooth
equipment
●PDAs
●Portable
communication modem
●Portable
games
●Cameras
●Digital
cameras
●Cordless
phones
●Notebook
computers
■GENERAL
DESCRIPTION
The XC9215/9216/9217 series is a group of synchronous-rectification
type DC/DC converters with a built-in 0.6Ω P-channel driver transistor
and 0.7Ω 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 1.0μA 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.
P-ch Driver Tr. Built-in
:ON resistance 0.6Ω
N-ch
Synchronous Driver Tr. Built-in :ON resistance 0.7Ω
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.
■FEATURES
■TYPICAL
PERFORMANCE
CHARACTERISTICS
●Effciency
vs. Output Current
XC9217A18C
100
L=3.3μH(CDRH3D16), CIN=4.7μF(ceramic), CL=10μF(ceramic), T opr=25℃
■TYPICAL
APPLICATION CIRCUIT
VIN
CIN
(ceramic)
CE/MODE
L
1
2
3
VIN
VSS
CE/
VOUT
MODE
Lx
5
VOUT
(500mA)
CL
(ceramic)
Efficiency:EFFI(%)
90
80
70
60
50
40
30
20
10
0
0.1
1
10
100
Output Current:IOUT(mA)
1000
PWM /PFM Automatic Switching Control
PWM Control
VIN=5.0V
VIN=3.6V
VIN=2.7V
4
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