- 您现在的位置：买卖IC网 > PDF目录1883 > XC9243B08DDR-G (Torex Semiconductor Ltd)IC REG BUCK SYNC ADJ 2A USP-10B PDF资料下载
参数资料
| 型号： | XC9243B08DDR-G |
| 厂商： | Torex Semiconductor Ltd |
| 文件页数： | 9/29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 |
第1页第2页第3页第4页第5页第6页第7页第8页当前第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页
150 C (TYP.), the thermal shutdown circuit starts operating and the P-channel driver transistor will be turned off. At the same time, the output
voltage decreases. When the temperature drops to 130 C (TYP.) after shutting off the current flow, the IC performs the soft start function to
XC9242/XC9243
Series
■ OPERATIONAL DESCRIPTION (Continued)
<Thermal Shutdown>
For protection against heat damage, the thermal shutdown function monitors chip temperature. When the chip’s temperature reaches
O
O
initiate output startup operation.
< Function of CE pin >
The XC9242/9243 series will enter into stand-by mode by inputting a low level signal to the CE pin. During a stand-by mode, the current
consumption of the IC becomes 0 μ A (TYP.). The IC starts its operation by inputting a high level signal to the CE pin. The input of the CE pin
is a CMOS input and the sink current is 0 μ A (TYP.).
<UVLO>
When the VIN pin voltage becomes 2.4V (TYP.) or lower, the P-channel MOS driver transistor output driver transistor is forced OFF to
prevent false pulse output caused by unstable operation of the internal circuitry. When the V IN pin voltage becomes 2.68V (MAX.) or higher,
switching operation takes place. By releasing the UVLO function, the IC performs the soft start function to initiate output startup operation.
The soft start function operates even when the VIN pin voltage falls momentarily below the UVLO operating voltage. The UVLO circuit does
not cause a complete shutdown of the IC, but causes pulse output to be suspended; therefore, the internal circuitry remains in operation.
<Soft Start>
The XC9242/XC9243 series provide 1.0ms (TYP). Soft start time is defined as the time interval to reach 90% of the output voltage from the
time when the V CE is turned on.
<C L High Speed Discharge>
The XC9242/XC9243 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 MOS switch transistor located between the L X pin and the V GND 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 formulas.
V = V OUT(E) × e
-t / τ
or
t = τ ln (V OUT(E) /V)
V : Output voltage after discharge
V OUT(E) : Output voltage
t: Discharge time
τ : C L ×R DCHG
C L : Capacitance of Output capacitor
R DCHG : C L auto-discharge resistance
Output Voltage Dischage characteristics
5.0
4.5
4.0
3.5
3.0
DCHG
Rdischg = 130 ? (TYP.)
C L =20 μF
2.5
2.0
1.5
1.0
0.5
0.0
VOUT =1.2V
VOUT =1.8V
VOUT =3.3V
0
2
4
6
8
10 12
14
16 18
20
Discharge Time: t(ms)
9/29
相关PDF资料 |
PDF描述 |
|---|---|
| XC9303B093KR-G | IC REG CTRLR BST PWM 8-MSOP |
| XC9503B093AR-G | IC REG BUCK ADJ 1A DL 10MSOP |
| XC9519A12AZR-G | IC REG BOOST INV ADJ 2A DL 24QFN |
| XRP29302ETB-L | IC REG LDO ADJ 3A TO263-5 |
| XRP2997IDBTR-F | IC CONV DDR DDR2 DDR3 8SOIC |
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 |
发布紧急采购，3分钟左右您将得到回复。