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参数资料
| 型号： | XCL202B331BR-G |
| 厂商： | Torex Semiconductor Ltd |
| 文件页数： | 7/21页 |
| 文件大小： | 0K |
| 描述： | IC STEP DOWN DC/DC 3.3V CL2025 |
| 标准包装： | 1 |
| 系列： | XCL202 |
| 类型： | 非隔离（POL） |
| 输出数： | 1 |
| 电压 - 输入（最小）： | 2V |
| 电压 - 输入（最大）： | 6V |
| Voltage - Output 1： | 3.3V |
| 电流 - 输出（最大）： | 400mA |
| 特点： | 具有远程开/关功能和 UVLO |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 1008（2520 公制） |
| 尺寸/尺寸： | 0.10" L x 0.08" W x 0.04" H（2.5mm x 2.0mm x 1.04mm） |
| 包装： | 标准包装 |
| 工作温度： | -40°C ~ 85°C |
| 效率： | 92% |
| 其它名称： | 893-1173-6 |
XCL201/XCL202
Series
■ OPERATIONAL DESCRIPTION
The XCL201/XCL202 series consists of a reference voltage source, ramp wave circuit, error amplifier, PWM comparator, phase compensation
circuit, output voltage adjustment resistors, P-channel MOSFET driver transistor, N-channel MOSFET switching transistor for the synchronous
switch, current limiter circuit, UVLO circuit with control IC, and an inductor. (See the block diagram below.) Using the error amplifier, the voltage
of the internal voltage reference source is compared with the feedback voltage from the V OUT pin through split resistors, R1 and R2. Phase
compensation is performed on the resulting error amplifier output, to input a signal to the PWM comparator to determine the turn-on time during
PWM operation. The PWM comparator compares, in terms of voltage level, the signal from the error amplifier with the ramp wave from the ramp
wave circuit, and delivers the resulting output to the buffer driver circuit to cause the Lx pin to output a switching duty cycle.
This process is
continuously performed to ensure stable output voltage. The current feedback circuit monitors the P-channel MOS driver transistor current for
each switching operation, and modulates the error amplifier output signal to provide multiple feedback signals. This enables a stable feedback
loop even when a low ESR capacitor such as a ceramic capacitor is used ensuring stable output voltage.
L2
V OUT
Inductor
Phase
Compensation
Current Feedback
Current Limit
L1
R1
R2
CFB
FB
Error
Amp.
PWM
Comparator
Logic
Synch
Buffer
Drive
Lx
VSHORT
V IN
Vref with
Soft Start,
CE
PWM/PFM
Selector
V SS
V SS
R3
R4
UVLO
UVLO Cmp
Ramp Wave
Generator
OSC
CE
Control
Logic
CE/
CE
<Reference Voltage Source>
The reference voltage source provides the reference voltage to ensure stable output voltage of the DC/DC converter.
<Ramp Wave Circuit>
The ramp wave circuit determines switching frequency. The frequency is fixed internally 1.2MHz. Clock pulses generated in this circuit are
used to produce ramp waveforms needed for PWM operation, and to synchronize all the internal circuits.
<Error Amplifier>
The error amplifier is designed to monitor output voltage. The amplifier compares the reference voltage with the feedback voltage divided by the
internal split resistors, R1 and R2. When a feed back voltage is lower than the reference voltage, the output voltage of the error amplifier is
increased. The gain and frequency characteristics of the error amplifier output are fixed internally to deliver an optimized signal to the mixer.
7/21
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相关代理商/技术参数 |
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| XCL202B331ER-G | 功能描述:DC DC CONVERTER 3.3V 制造商:torex semiconductor ltd 系列:XCL202 零件状态:在售 类型:非隔离 PoL 模块 输出数:1 电压 - 输入（最小值）:2V 电压 - 输入（最大值）:6V 电压 - 输出 1:3.3V 电压 - 输出 2:- 电压 - 输出 3:- 电压 - 输出 4:- 电流 - 输出（最大值）:400mA 应用:ITE（商业） 特性:- 工作温度:-40°C ~ 85°C 效率:92% 安装类型:表面贴装 封装/外壳:6-TDFN 裸露焊盘 大小/尺寸:0.10" 长 x 0.08" 宽 x 0.04" 高（2.5mm x 2.0mm x 1.0mm） 标准包装:1 |
| XCL205 | 制造商:TOREX 制造商全称:Torex Semiconductor 功能描述:Inductor Built-in Step-Down micro DC/DC Converters |
| XCL205_1 | 制造商:TOREX 制造商全称:Torex Semiconductor 功能描述:Inductor Built-in Step-Down micro DC/DC Converters |
| XCL205A103AR-G | 制造商:TOREX 制造商全称:Torex Semiconductor 功能描述:Inductor Built-in Step-Down micro DC/DC Converters |
| XCL205A123AR-G | 制造商:TOREX 制造商全称:Torex Semiconductor 功能描述:Inductor Built-in Step-Down micro DC/DC Converters |
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