參數(shù)資料
XC9509
Series
1/41
Synchronous Step-Down DC/DC Converter
with Built-In LDO Regulator in Parallel Plus Voltage Detector
■
GENERAL DESCRIPTION
The XC9509 series consists of a step-down DC/DC converter and a high-speed LDO regulator connected in parallel with the
DC/DC converter's output. A voltage detector is also built-in. Since the input for the LDO voltage regulator block comes
from the input power supply, it is suited for use with various applications.
The DC/DC converter block incorporates a P-channel driver transistor and a synchronous N-channel switching transistor.
With an external coil, diode and two capacitors, the XC9509 can deliver output currents up to 600mA at efficiencies over 90%.
The XC9509 is designed for use with small ceramic capacitors.
A choice of three switching frequencies are available, 300kHz, 600kHz, and 1.2MHz. Output voltage settings for the DC/DC
and VR are set-up internally in 100mV steps within the range of 0.9V to 4.0V (± 2.0%). For the VD, the range is of 0.9V to
5.0V (± 2.0%). The soft start time of the series is internally set to 5ms. 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 1.4 V or lower. The functions of
the MODE pin can be selected via the external control pin to switch the DC/DC control mode and the disable pin to shut down
either the DC/DC block or the regulator block.
■
APPLICATIONS
●
CD-R / RW, DVD
●
HDD
●
PDAs, portable communication modem
●
Cellular phones
●
Palmtop computers
●
Cameras, video recorders
■
TYPICAL APPLICATION CIRCUIT
■
FEATURES
Input Voltage Range
: 2.4V ~ 6.0V
Low ESR Capacitor
VD Function
Small Package
<DC/DC Converter Block>
Output Voltage Range
: 0.9V ~ 4.0V (Accuracy
±
2%)
Output Current
: 600mA (for MSOP-10 package)
400mA (for USP-10 package)
Control Method
: PWM or PWM/PFM Selectable
Oscillation Frequency
: 300kHz, 600kHz, 1.2MHz
<Regulator Block>
Reglator Output
:
Parallel Input to DC/DC Converter
Output Voltage Range
: 0.9V ~ 4.0V (Accuracy
±
2%)
Current Limit
: 300mA
Dropout Voltage
: 80mV @ I
OUT
=100mA (V
OUT
=2.8V)
High Ripple Rejection
: 60dB @1kHz (V
OUT
=2.8V)
: Ceramic capacitor compatible
: Sense internally either V
DD
, D
COUT
,
or V
ROUT
. N-ch open drain output
: MSOP-10, USP-10
■
TYPICAL PERFORMANCE
CHARACTERISTICS
XC9509Hxxxx
V
IN
=3.6V, Topr=25
℃
, L=4.7
μ
H (CDRH4D28C),
C
IN
:4.7
μ
F (ceramic), C
L1
:10
μ
F (ceramic), C
L2
: 4.7
μ
F (ceramic)
* Please refer to the typical application circuit when
external components are selected.
MSOP-10 (TOP VIEW)
ETR1006_001
相關(guān)PDF資料
PDF描述
XC9509E036AR Synchronous Step-Down DC/DC Converter with Built-In LDO Regulator in Parallel Plus Voltage Detector
XC9509E036DL Synchronous Step-Down DC/DC Converter with Built-In LDO Regulator in Parallel Plus Voltage Detector
XC9509E036DR Synchronous Step-Down DC/DC Converter with Built-In LDO Regulator in Parallel Plus Voltage Detector
XC9509E03CAL Synchronous Step-Down DC/DC Converter with Built-In LDO Regulator in Parallel Plus Voltage Detector
XC9509E03CAR Synchronous Step-Down DC/DC Converter with Built-In LDO Regulator in Parallel Plus Voltage Detector
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
XC9509E036AR 制造商:TOREX 制造商全稱(chēng):Torex Semiconductor 功能描述:Synchronous Step-Down DC/DC Converter with Built-In LDO Regulator in Parallel Plus Voltage Detector
XC9509E036DL 制造商:TOREX 制造商全稱(chēng):Torex Semiconductor 功能描述:Synchronous Step-Down DC/DC Converter with Built-In LDO Regulator in Parallel Plus Voltage Detector
XC9509E036DR 制造商:TOREX 制造商全稱(chēng):Torex Semiconductor 功能描述:Synchronous Step-Down DC/DC Converter with Built-In LDO Regulator in Parallel Plus Voltage Detector
XC9509E03CAL 制造商:TOREX 制造商全稱(chēng):Torex Semiconductor 功能描述:Synchronous Step-Down DC/DC Converter with Built-In LDO Regulator in Parallel Plus Voltage Detector
XC9509E03CAR 制造商:TOREX 制造商全稱(chēng):Torex Semiconductor 功能描述:Synchronous Step-Down DC/DC Converter with Built-In LDO Regulator in Parallel Plus Voltage Detector
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