- 您现在的位置：买卖IC网 > PDF目录13319 > NCV8800HDW26R2 (ON Semiconductor)IC REG BUCK SYNC 2.6V 1A 16SOIC PDF资料下载
参数资料
| 型号： | NCV8800HDW26R2 |
| 厂商： | ON Semiconductor |
| 文件页数： | 9/13页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC 2.6V 1A 16SOIC |
| 产品变化通告： | Product Discontinuation 09/Jan/2008 |
| 标准包装： | 1,000 |
| 类型： | 降压（降压） |
| 输出类型： | 固定 |
| 输出数： | 1 |
| 输出电压： | 2.6V |
| 输入电压： | 3.5 V ~ 16 V |
| PWM 型： | 混合物 |
| 频率 - 开关： | 200kHz |
| 电流 - 输出： | 1A |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SOIC（0.295"，7.50mm 宽） |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 16-SOIC W |
NCV8800 Series
CIRCUIT DESCRIPTION
ENABLE
The NCV8800 remains in sleep mode drawing less than
25 μ A of quiescent current until the ENABLE pin is brought
high powering up the device. There are two options
available for the ENABLE feature.
? Option 1 (Sequenced). The output voltage tracks the
ENABLE pin with a maximum delta voltage between
them (reference the Output Tracking specs in the
Electrical Characteristics). This allows the device to be
used with microprocessors requiring dual supply
voltages. One voltage is typically needed to power the
core of the microprocessor, and another high voltage is
needed to power the microprocessor I/O.
? Option 2 (High Voltage). This option removes the
sequencing feature above, and allows the device to be
controlled up to the battery voltage on the ENABLE
pin with an external resistor (10 k). See Figure 5.
10 k
RESET
The RESET is an open drain output which goes low when
the feedback voltag e on FB1 and FB2 goes below the
undervoltage RESET threshold. The output also goes low
when the voltage on FB1 and FB2 exceeds the overvoltage
RESET threshold. The RESET output is an open drain
output capable of sinking 1.6 mA.
FB1 and FB2
FB1 and FB2 are the feedback pins to the error amplifier,
which control the output SWITCH as needed to the
regulated output. They are internally wire bonded to the
same electrical connection providing double protection for
an open circuit which would cause the buck regulator to rise
above its desired output reaching the voltage on V IN . These
pins also provide the feedback path for the RESET function.
DELAY
There are two options for the delay time for the RESET to go
low. Connecting the pin to GND will provide a minimum of 14
ms. Connecting the pin to FB1 and FB2 will provide a
minimum of 28 ms. Absolute max voltage on the DELAY
ENABLE
V IN
pin is 7.0 V. Use a resistor divider to run off higher voltages.
The 7.5 V option will require this divider (see Figure 6).
V BAT
Figure 5. Switched Battery Application
AUXILIARY
The AUXILIARY pin provides an alternate path for the IC
to maintain operation. The AUXILIARY pin is diode OR’d
with the V IN pin to the control circuitry (the DMOS output
drivers are not included). If the voltage (V IN ) from the
battery dips as low as 3.5 V during a crank condition, the
NCV8800 will maintain operation through a 6.0 V(min)
connection on the AUXILIARY pin. Using this feature is
optional. This pin should be grounded when not in use.
V IN
Normal supply voltage input. An external diode must be
provided to afford reverse battery protection.
SWITCH
DMOS output drivers with 0.75 ? max push/pull
capability. Non--overlap logic is provided to guarantee shoot
through current is minimized.
V OUT
DELAY
(7.0 V max)
Figure 6.
COMP
The COMP pin provides access to the error amplifiers
output. Switching power supplies work as feedback control
systems, and require compensation for stability. A 1.0 k
resistor and 0.1 μ F capacitor work well in the application in
Figure 2.
CP
The on--chip DMOS drivers require the gates of the
devices to be pulled above their drain voltage. An external
capacitor located between the SWITCH output, and the CP
pin provides the charge pump action to drive the gate of the
high--side driver high enough to turn the device on.
http://onsemi.com
9
相关PDF资料 |
PDF描述 |
|---|---|
| ESC28DREF-S734 | CONN EDGECARD 56POS .100 EYELET |
| MAX6887KETE+T | IC SUPERVISOR HEX 16-TQFN |
| RBC43DRXI-S734 | CONN EDGECARD 86POS DIP .100 SLD |
| MAX6887NETE+T | IC SUPERVISOR HEX 16-TQFN |
| RBC43DRTI-S734 | CONN EDGECARD 86POS DIP .100 SLD |
相关代理商/技术参数 |
参数描述 |
|---|---|
| NCV8800HDW26R2G | 功能描述:直流/直流开关转换器 Synchronous Buck Automotive RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| NCV8800HDW33 | 功能描述:直流/直流开关转换器 Synchronous Buck RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| NCV8800HDW33G | 功能描述:直流/直流开关转换器 Synchronous Buck Automotive RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| NCV8800HDW33R2 | 功能描述:直流/直流开关转换器 Synchronous Buck RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| NCV8800HDW33R2G | 功能描述:直流/直流开关转换器 Synchronous Buck Automotive RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
发布紧急采购，3分钟左右您将得到回复。