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參數(shù)資料
| 型號： | XC95106SR |
| 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LDO穩(wěn)壓器在加電壓檢測器系列 |
| 文件頁數(shù)： | 1/9頁 |
| 文件大?。?/td> | 116K |
| 代理商： | XC95106SR |
October 28, 2003 Ver. 4
Synchronous Step-Down DC/DC Converter with Built-In LDO Regulator In Series plus Voltage Detector
Preliminary
!
Input Voltage Range
!
Output Voltage Range
2.4V ~ 6.0V
DC/DC
VR
VD
300kHz, 600kHz, 1.2MHz
DC/DC
800mA
VR
600mA
SOP-8
!
APPLICATIONS
"
CD-R / RW, DVD
"
HDD
"
PDAs, portable communication modem
"
Cellular phones
"
Palmtop computers
"
Cameras, video recorders
0.9 ~ 4.0V (
±
2%)
0.9 ~ 4.0V (
±
2%)
0.9 ~ 5.0V (
±
2%)
!
Switching Frequency
!
Output Current
!
Ultra Small Packages
!
Ceramic Capacitor Compatible
!
GENERAL DESCRIPTION
!
FEATURES
Input Voltage Range :
2.4V ~ 6.0V
Load Capacitors :
Ceramic Capacitors Compatible
(Low ESR Capacitors)
VD Function :
Detects output voltage from the VDOUT pin
while sensing either VDD, DCOUT,
or VROUT internally.
Nch Open Drain Output
<DC/DC Converter>
Output Voltage Range : 0.9 ~ 4.0V (Accuracy
±
2%)
Output Current :
800mA
Controls :
PWM Control
PWM, PWM / PFM Automatic
Switching External
Oscillation Frequency : 300kHz, 600kHz, 1.2MHz
<Regulator>
Output Voltage Range : 0.9 ~ 4.0V (Accuracy
±
2%)
Current Limit
600mA
Dropout Voltage :
240mV @ IOUT=300mA (VOUT=2.8V)
High Ripple Rejection
60dB @1kHz (VOUT=2.8V)
!
TYPICAL APPLICATION CIRCUIT
!
TYPICAL PERFORMANCE CHARACTERISTICS
XC9510 Series
The XC9510 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 XC9510 can deliver output currents
up to 800mA at efficiencies over 90%. The XC9510 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 and VR are set-up internally in
0.1V 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 operational states of the DC/DC and the regulator blocks can be
changed by inputting three kinds of voltage level via the CE/MODE pin.
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.
SOP-8 (Top View)
1
2
3
4
8
7
5
6
VDD
CE/
MODE
AGND
LX
DCOUT
VROUT
VDOUT
PGND
CIN
L
CL1
CL2
DCOUT
VROUT
SD
(
Semiconductor Ltd.
XC9510Hxxxx
0
10
20
30
40
50
60
70
80
90
100
0.1
1
10
100
1000
DC/DC Output Current IDOUT
VR Output Current IROUT (mA)
E
VIN=5.0V, Topr=25
O
C, L:4.7uH(CDRH4D28C),
CIN:4.7uF(ceramic), CL1:10uF(ceramic), CL2:1uF(ceramic)
DC/DC Efficiency (DCOUT:3.4V, 1.2MHz), VR Efficiency (VROUT:3.0V)
PWM/PFM switching control
PWM control
Data Sheet
1
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