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參數(shù)資料
| 型號： | XC9303E093KR |
| 廠商： | TOREX SEMICONDUCTOR LTD. |
| 英文描述： | High Efficiency, Synchronous Step-Up & Down DC / DC Controller ICs |
| 中文描述： | 高，同步降壓效率最高 |
| 文件頁數(shù)： | 1/20頁 |
| 文件大?。?/td> | 921K |
| 代理商： | XC9303E093KR |
XC9303
Series
1/20
High Efficiency, Synchronous Step-Up & Down DC / DC Controller ICs
■
GENERAL DESCRIPTION
The XC9303 series is highly efficient, synchronous PWM, PWM/PFM switchable step-up & down DC/DC controller ICs.
A versatile, large output current and high efficiency, step-up/down DC/DC controller can be realized using only basic
external components - transistors, coil, diode, capacitors, and resistors for detecting voltages. High efficiency is obtained
through the use of a synchronous rectification topology. The operation of the XC9303 series can be switched between PWM
and PWM/PFM (auto switching) externally using the PWM pin. In PWM/PFM mode, the XC9303 automatically switches
from PWM to PFM during light loads and high efficiencies can be achieved over a wide range of output loads conditions.
Output noise can be easily reduced with PWM control since the frequency is fixed. Synchronous rectification control can be
switched to non-synchronous by using external signals (MODE pin). High efficiency can be regulated at heavy loads when
synchronous operation. The XC9303 has a 0.9V (±2.0%) internal voltage supply and using externally connected
components, output voltage can be set freely between 2.0V to 6.0V. With an internal 300kHz switching frequency smaller
external components can be used. Soft-start time is internally set to 10msec and offers protection against in-rush currents
when the power is switched on and prevents voltage overshoot.
■
TYPICAL APPLICATION CIRCUIT
■
TYPICAL PERFORMANCE
CHARACTERISTICS
●
Efficiency vs. Output Current
■
APPLICATIONS
●
PDAs
●
Palmtop computers
●
Portable audios
●
Various power supplies
■
FEATURES
Input Voltage Range
:
2.0V ~ 10V
Output Voltage Range
:
2.0V ~ 6.0V
:
Can be set freely with 0.9V
(±2.0%) of reference voltage
supply and external
components.
Oscillation Frequency
:
300kHz (±15%)
Output Current
:
More than 800mA
(V
IN
= 4.2V, V
OUT
=3.3V)
Stand-By Function
:
3.0
μ
A (MAX.)
Synchronous Step-Up & Down DC / DC Controller
Maximum Duty Cycle
:
78% (TYP.)
PWM, PWM/PFM Switching Control
Synchronous Rectification Control
High Efficiency
:
84% (TYP.)
Soft-Start Time
:
10ms (internally set)
Package
:
MSOP-8A
<XC9303B093K OUTPUT= 3.3V>
☆
GO-Compatible
SD:CMS02
VDD
EXT1
PWM
CE
GND
EXT2
FB
PWM
CE
L:22uH
CDRH127/LD
Tr1:Pch
MOSFET
:CPH6315
RFB
:75 k
Ω
Tr2:Nch
:CPH3409
MOSFET
CIN :47uF
VIN :2.0V~10V
CL:
47uFX2
RFB
:200 k
Ω
CFB
:62pF
VOUT:3.3V
Tr3:Nch
MOSFET
:CPH3409
NC
XC9303B093K(300kHz, V
OUT
=3.3V)
0
10
20
30
40
50
60
70
80
90
100
0.1
1
10
100
1000
10000
Output Current I
OUT
(mA)
E
L=22uH(CDRH127/LD), CL=94uF(Tantalum),SD:CMS02
Tr1:CPH6315, Tr2:CPH3409, Tr3:CPH3409
VIN=2.7V
4.2V
PWM Control
PWM/PFM Switching Control
ETR0602_001
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