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参数资料
| 型号： | XCL202B331BR-G |
| 厂商： | Torex Semiconductor Ltd |
| 文件页数： | 9/21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 (Continued)
<PFM Switch Current>
In PFM control operation, until coil current reaches to a specified level (I PFM ), the IC keeps the P-ch MOSFET on.
In this case, on-time (t ON ) that
the P-ch MOSFET is kept on can be given by the following formula.
t ON = L × I PFM / (V IN ? V OUT ) → IPFM ①
<PFM Duty Limit>
In the PFM control operation, the PFM Duty Limit (DTY LIMIT_PFM ) is set to 200% (TYP.). Therefore, under the condition that the duty increases (e.g.
the condition that the step-down ratio is small), it’s possible for P-ch MOSFET to be turned off even when coil current doesn’t reach to IPFM. → IPFM ②
大 制限
最 DTY LIMIT_PFM
t ON
Lx
I PFM
Lx
f OSC
I PFM
I Lx
I PFM ①
0mA
I Lx
I PFM ②
0mA
< C L High Speed Discharge>
The XCL201/XCL202 series can quickly discharge the electric charge at the output capacitor (C L ) when a low signal to the CE pin which enables
a whole IC circuit put into OFF state, is inputted via the N-channel transistor located between the L X pin and the V SS pin. When the IC is disabled,
electric charge at the output capacitor (C L ) is quickly discharged so that it may avoid application malfunction. Discharge time of the output
capacitor (C L ) is set by the C L auto-discharge resistance (R) and the output capacitor (C L ). By setting time constant of a C L auto-discharge
resistance value [R] and an output capacitor value (C L ) as τ ( τ =C x R), discharge time of the output voltage after discharge via the N channel
transistor is calculated by the following formula.
V = V OUT(T) x e
–t/ τ
or
t= τ ln (V OUT(T) / V)
V : Output voltage after discharge
V OUT(T) : Output voltage
t: Discharge time,
τ : C x R
C=Capacitance of output capacitor (C L )
R=C L auto-discharge resistance
Output Voltage Discharge Characteristics
R DCHG =300 Ω (TYP.)
100
80
60
40
20
0
CL=10μF
CL=20μF
CL=50μF
0
20
40
60
80
100
Discharge Time ｔ(ms)
9/21
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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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