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参数资料
| 型号： | XC9243B08DDR-G |
| 厂商： | Torex Semiconductor Ltd |
| 文件页数： | 1/29页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 2A USP-10B |
| 标准包装： | 3,000 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.9 V ~ 6 V |
| 输入电压： | 2.7 V ~ 6 V |
| 频率 - 开关： | 2.4MHz |
| 电流 - 输出： | 2A |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-UFDFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | USP-10B |
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XC9242/XC9243 Series
2A Synchronous Step-Down DC/DC Converters
ETR0521-012
☆ GreenOperation Compatible
■ GENERAL DESCRIPTION
The XC9242/XC9243 series is a group of synchronous-rectification step-down DC/DC converters with a built-in 0.11 Ω
(TYP.) P-channel MOS driver transistor and 0.12 Ω (TYP.) N-channel MOS switching transistor, designed to allow the use of
ceramic capacitors. The small on-resistances of these two internal driver transistors enable a high efficiency, stable power
supply with an output current up to 2A. The XC9242/XC9243 series has operating voltage range of 2.7V~6.0V and a 0.8V
(±2.0%) reference voltage, and using externally connected resistors, the output voltage can be set freely from 0.9V. With
an internal switching frequency of 1.2MHz or 2.4MHz, small external components can be used.
The XC9242 series is PWM control, and the XC9243 series is PWM/PFM, which automatically switches from PWM to PFM
during light loads and provides high efficiency, high load response, low voltage ripple, can be achieved over a wide range of
load conditions. The series have a high speed soft-start as fast as 1ms in typical for quick turn-on. It’s suitable for
large-current application due to limit current is configured 4.0A in typical. During stand-by, all circuits are shutdown to
reduce current consumption to as low as 1.0 μ A or less. The integrated C L discharge function which enables the electric
charge at the output capacitor C L to be discharged via the internal discharge switch located between the L X and V SS pins.
Due to C L discharge function, malfunction on L X is prevented when Stand-by mode. With the built-in UVLO (Under Voltage
Lock Out) function, the internal P-channel driver transistor is forced OFF when input voltage becomes 2.5V or lower. The
series are available in USP-10B, SOP-8FD packages.
■ APPLICATIONS
■ FEATURES
Driver Transistor
:
0.11 ? P-ch Driver Transistor
●
●
●
●
●
Smart phones / Mobile phones
Bluetooth
Mobile devices / terminals
Portable game consoles
Digital still cameras / Camcorders
Input Voltage Range
Output Voltage Setting
FB Voltage
High Efficiency
Output Current
Oscillation Frequency
Maximum Duty Cycle
Functions
:
:
:
:
:
:
:
:
0.12 ? N-ch Switching Transistor
2.7V ～ 6.0V
0.9V ～ V IN
0.8V±2.0%
95%(TYP.)*
2.0A
1.2MHz±15%, 2.4MHz ± 15%
100%
Soft-Start Circuit Built-In
C L Discharge
Current Limit Circuit （ automatic return ）
Thermal Shutdown
UVLO
Output Capacitor
Control Methods
Operating Ambient Temperature
Packages
Environmentally Friendly
:
:
:
:
:
Low ESR Ceramic Capacitor
PWM control (XC9242)
PWM/PFM Auto (XC9243)
-40 ℃ ~ +85 ℃
USP-10B, SOP-8FD
EU RoHS Compliant, Pb Free
* Performance depends on external components and wiring on the PCB.
■ TYPICAL APPLICATION CIRCUIT
● XC9242/XC9243 Series (FB Type)
■ TYPICAL PERFORMANCE
CHARACTERISTICS
● Efficiency vs. Output Current (fosc=1.2MHz, V OUT =3.3V)
XC9242B 08C
L=4.7μH(SLF7055),C IN1 =20μF(LMK212ABJ106KGx2)
C IN2 =1μF(LMK107BJ105KAx1),C L =20μF(LMK212ABJ106KGx2)
R FB1 =47k Ω, R FB2 =15k Ω, C FB =330pF
100
90
80
70
60
50
40
30
20
10
0
V IN =5.0V
0.1
1
10
100
1000
10000
Output Current: I OUT (mA)
1/29
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相关代理商/技术参数 |
参数描述 |
|---|---|
| XC9243B08DQR-G | 制造商:Torex Semiconductor LTD 功能描述: |
| XC9246B65CMR-G | 制造商:Torex Semiconductor LTD 功能描述:IC REG BUCK ADJ 1A SOT-26W |
| XC9246B65CMR-G-EVB | 制造商:Torex Semiconductor LTD 功能描述:BOARD EVAL FOR XC9246B65 |
| XC9246B75CMR-G | 制造商:Torex Semiconductor LTD 功能描述:IC REG BUCK ADJ 1A SOT-26W |
| XC9246B75CMR-G-EVB | 制造商:Torex Semiconductor LTD 功能描述:BOARD EVAL FOR XC9246B75 |
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