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参数资料
| 型号： | NCV8702SN18T1G |
| 厂商： | ON Semiconductor |
| 文件页数： | 16/20页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 1.8V .2A SOT23-5 |
| 标准包装： | 3,000 |
| 稳压器拓扑结构： | 正，固定式 |
| 输出电压： | 1.8V |
| 输入电压： | 最高 5.5V |
| 电压 - 压降（标准）： | 0.14V @ 200mA |
| 稳压器数量： | 1 |
| 电流 - 输出： | 200mA |
| 电流 - 限制（最小）： | 220mA |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 6-TSSOP（5 引线），SC-88A，SOT-353 |
| 供应商设备封装： | 5-TSOP |
| 包装： | 带卷 (TR) |
NCV8702
APPLICATIONS INFORMATION
P D(MAX) +
q JA
P D [ V IN I GND @I OUT ) I OUT V IN * V OUT
Enable Operation
The NCV8702 uses the EN pin to enable/disable its output
and to deactivate/activate the active discharge function.
If the EN pin voltage is <0.4 V the device is guaranteed to
be disabled. The pass transistor is turned ? off so that there is
virtually no current flow between the IN and OUT. The
active discharge transistor is active so that the output voltage
V OUT is pulled to GND through a 1 k W resistor. In the
disable state the device consumes as low as typ. 10 nA from
the V IN .
If the EN pin voltage >0.9 V the device is guaranteed to
be enabled. The NCV8702 regulates the output voltage and
the active discharge transistor is turned ? off.
The EN pin has internal pull ? down current source with
typ. value of 110 nA which assures that the device is
turned ? off when the EN pin is not connected. A build in
2 mV of hysteresis in the EN prevents from periodic on/off
oscillations that can occur due to noise.
In the case where the EN function isn’t required the EN
pin should be tied directly to IN.
Undervoltage Lockout
The internal UVLO circuitry assures that the device
becomes disabled when the V IN falls below typ. 1.5 V. When
the V IN voltage ramps ? up the NCV8702 becomes enabled,
if V IN rises above typ. 1.6 V. The 100 mV hysteresis prevents
on/off oscillations that can occur due to noise on V IN line.
Reverse Current
The PMOS pass transistor has an inherent body diode
which will be forward biased in the case that V OUT > V IN .
Due to this fact in cases where the extended reverse current
condition is anticipated the device may require additional
external protection.
Output Current Limit
Output Current is internally limited within the IC to a
typical 380 mA. The NCV8702 will source this amount of
330
310
290
current measured with the output voltage 100 mV lower than
the nominal V OUT . If the Output Voltage is directly shorted
to ground (V OUT = 0 V), the short circuit protection will
limit the output current to 390 mA (typ). The current limit
and short circuit protection will work properly up to V IN =
5.5 V at T A = 25 ? C. There is no limitation for the short circuit
duration.
Thermal Shutdown
When the die temperature exceeds the Thermal Shutdown
threshold (T SD ? 160 ? C typical), Thermal Shutdown event
is detected and the device is disabled. The IC will remain in
this state until the die temperature decreases below the
Thermal Shutdown Reset threshold (T SDU ? 140 ? C typical).
Once the IC temperature falls below the 140 ? C the LDO is
enabled again. The thermal shutdown feature provides
protection from a catastrophic device failure due to
accidental overheating. This protection is not intended to be
used as a substitute for proper heat sinking.
Power Dissipation
As power dissipated in the NCV8702 increases, it might
become necessary to provide some thermal relief. The
maximum power dissipation supported by the device is
dependent upon board design and layout. Mounting pad
configuration on the PCB, the board material, and the
ambient temperature affect the rate of junction temperature
rise for the part.
The maximum power dissipation the NCV8702 can
handle is given by:
T J(MAX) * T A
(eq. 1)
The power dissipated by the NCV8702 for given
application conditions can be calculated from the following
equations:
(eq. 2)
0.65
0.60
0.55
270
250
P D(MAX) , T A = 25 ? C, 2 OZ CU
0.50
0.45
230
210
190 P D(MAX) , T A = 25 ? C, 1 OZ CU
170
q JA , 1 OZ CU
q JA , 2 OZ CU
0.40
0.35
0.30
0.25
150
0
100
200
300
400
500
600
0.20
700
PCB COPPER AREA (mm 2 )
Figure 62. q JA and P D(MAX) vs. Copper Area (TSOP5)
http://onsemi.com
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相关代理商/技术参数 |
参数描述 |
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| NCV8702SN28T1G | 功能描述:低压差稳压器 - LDO 200 MA LDO ULTRA-LOW IQ RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| NCV8702SN30T1G | 功能描述:低压差稳压器 - LDO 200 MA LDO ULTRA-LOW IQ RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| NCV8702SN33T1G | 功能描述:低压差稳压器 - LDO 200 MA LDO ULTRA-LOW IQ RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| NCV8703 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:300 mA, Ultra-Low Quiescent Current, IQ 12 A, Ultra-Low Noise, LDO Voltage Regulator |
| NCV8703MX18TCG | 制造商:ON Semiconductor 功能描述:300 MA LDO ULTRA-LOW IQ - Tape and Reel 制造商:ON Semiconductor 功能描述:REEL / 300 MA LDO ULTRA-LOW IQ |
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