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參數(shù)資料
| 型號： | XC9508_1 |
| 廠商： | TOREX SEMICONDUCTOR LTD. |
| 英文描述： | Synchronous Step-Down DC/DC Converter with Built-In LDO Regulator in Series Plus Voltage Detector |
| 中文描述： | 同步降壓型DC / DC轉(zhuǎn)換器，配有穩(wěn)壓器在系列脈沖電壓檢測器調(diào)節(jié)器 |
| 文件頁數(shù)： | 1/38頁 |
| 文件大小： | 2943K |
| 代理商： | XC9508_1 |
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XC9508
Series
1/38
Synchronous Step-Down DC/DC Converter
with Built-In LDO Regulator in Series Plus Voltage Detector
■
GENERAL DESCRIPTION
The XC9508 series consists of a step-down DC/DC converter and a high-speed LDO regulator connected in series with the
DC/DC converter's output. A voltage detector is also built-in. A highly efficient, low noise output is possible since the
regulator is stepped-down further from the DC/DC output.
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 XC9508 can deliver output currents up to 600mA at efficiencies over 90%.
The XC9508 is designed for use with small ceramic capacitors.
A choice of three switching frequencies are available, 300
kHz, 600 kHz, and 1.2 MHz. Output voltage settings for the DC/DC is set-up internally in 100mV steps within the range of
1.6V to 4.0V(± 2.0%) and for the VR are set-up internally 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 the regulator block.
■
APPLICATIONS
●
CD-R / RW, DVD
●
HDD
●
PDAs, portable communication modem
●
Cellular phones
●
Palmtop computers
●
Cameras, video recorders
■
TYPICAL APPLICATION CIRCUIT
■
FEATURES
DC/DC Converter with Built-in LDO and VD Function
Input Voltage Range
: 2.4V ~ 6.0V
Low ESR Capacitor
: Ceramic capacitor compatible
VD Function
: N-channel open drain output
Small Package
: MSOP-10, USP-10
<DC/DC Converter Block>
Output Voltage Range
: 1.6V ~ 4.0V (Accuracy
±
2%)
Output Current
: 600mA (for MSOP-10 package)
400mA (for USP-10 package)
Control Mothod
: PWM or PWM/PFM Selectable
Oscillation Frequency
: 300kHz, 600kHz, 1.2MHz
<Regulator Block>
Regulator Input
: Serial input from DC/DC output
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)
■
TYPICAL PERFORMANCE
CHARACTERISTICS
XC9508Cxxxx
V
IN
=3.6V, Topr=25
O
C, 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)
ETR1005_001
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|---|---|
| XC9509A033AL | Synchronous Step-Down DC/DC Converter with Built-In LDO Regulator in Parallel Plus Voltage Detector |
| XC9509A033AR | Synchronous Step-Down DC/DC Converter with Built-In LDO Regulator in Parallel Plus Voltage Detector |
| XC9509A033DL | Synchronous Step-Down DC/DC Converter with Built-In LDO Regulator in Parallel Plus Voltage Detector |
| XC9509A033DR | Synchronous Step-Down DC/DC Converter with Built-In LDO Regulator in Parallel Plus Voltage Detector |
| XC9509A036AL | Synchronous Step-Down DC/DC Converter with Built-In LDO Regulator in Parallel Plus Voltage Detector |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| XC9508AXXXXX | 制造商:TOREX 制造商全稱:Torex Semiconductor 功能描述:Synchronous Step-Down DC/DC Converter with Built-In LDO Regulator plus Voltage Detector |
| XC9508CXXXXX | 制造商:TOREX 制造商全稱:Torex Semiconductor 功能描述:Synchronous Step-Down DC/DC Converter with Built-In LDO Regulator plus Voltage Detector |
| XC9508X15XXX | 制造商:TOREX 制造商全稱:Torex Semiconductor 功能描述:Synchronous Step-Down DC/DC Converter with Built-In LDO Regulator plus Voltage Detector |
| XC9508XXX3XX | 制造商:TOREX 制造商全稱:Torex Semiconductor 功能描述:Synchronous Step-Down DC/DC Converter with Built-In LDO Regulator plus Voltage Detector |
| XC9508XXX6XX | 制造商:TOREX 制造商全稱:Torex Semiconductor 功能描述:Synchronous Step-Down DC/DC Converter with Built-In LDO Regulator plus Voltage Detector |
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