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参数资料
| 型号： | YB1220ST26TAY |
| 厂商： | YOBON TECHNOLOGIES, INC. |
| 元件分类： | 线性稳压 |
| 英文描述： | Dual Channel 200mA LDO Regulator |
| 中文描述： | 双通道200mA的LDO稳压器 |
| 文件页数： | 8/9页 |
| 文件大小： | 508K |
| 代理商： | YB1220ST26TAY |
YB1220
Dual Channel 200mA LDO Regulator
YB1220 MRev.1.1
www.yobon.com.tw
8
P-channel MOSFET pass transistor. This
provides several advantages over similar
designs using a PNP pass transistor,
including low operating power and longer
battery life. The YB1220 consumes only
90A around of quiescent current under
most conditions.
Output Short-Circuit Current Limit
The YB1220 includes two current limiters,
which monitor and control the pass
transistor’s gate voltage, limiting the output
current to about 80mA, for example, in a
short-circuit output situation.
Shutdown
The YB1220 also features a low-power
shutdown mode. It consists of independent
switches to turn off different channel. The
two LDOs are allowed to work in both
active, only one active or both disabled to
keep the lowest current consumption. In the
both
shutdown
mode,
the
internal
functional
blocks,
such
as
voltage
reference and the error amplifiers, are
turned off completely, and the quiescent
current is less than 1A. In the single
shutdown mode, the reference circuit and
the active side error amplifier remain
functional whereas the disabled error
amplifier gets into shutdown mode.
Thermal Protection Shutdown
The thermal protection shutdown function
protects the device from operating in over
temperature condition. When the junction
temperature exceeds +160°C, the thermal
sensor signals the shutdown logic, turning
off the pass transistor and allowing the IC
to cool down. The thermal sensor turns the
pass transistor on again after the IC’s
junction temperature drops to +140°C.
Soft-Start Circuitry
The YB1220 includes a soft-start circuitry to
limit inrush current at turn-on. During power
up, the output capacitor and output load are
charged with a reduced output current.
Shortly after the initial power up, the
soft-start feature is terminated and normal
operation is resumed.
Application Information
Enable/Shutdown
The YB1220 comes with an active-high
enable pin that allows the regulator to be
enabled. Forcing the enable pin low
disables the regulator and puts it into the
shutdown mode. This pin cannot be left
floating as it may cause an undetermined
state.
Input/Output Capacitor
It is recommended to use a 1.0F capacitor
on the YB1220 input and a 1.0F capacitor
on
the
output.
For
high
regulation
performance, larger input capacitor values
and lower ESRs provide better noise
rejection and line-transient response. The
output noise, load-transient response,
stability, and power-supply rejection can be
improved by using large output capacitors.
Low ESR ceramic capacitors provide
optimal performance and save space.
Transient Response
The transient response can be improved by
increasing the values of the input and
output bypass capacitors, and through
passive filtering techniques.
相关PDF资料 |
PDF描述 |
|---|---|
| YB1220ST26TA | Dual Channel 200mA LDO Regulator |
| YB1220ST26TBA | Dual Channel 200mA LDO Regulator |
| YB1220ST26TBB | Dual Channel 200mA LDO Regulator |
| YB1220ST26TBY | Dual Channel 200mA LDO Regulator |
| YB1220ST26TB | Dual Channel 200mA LDO Regulator |
相关代理商/技术参数 |
参数描述 |
|---|---|
| YB1220ST26TB | 制造商:YOBON 制造商全称:YOBON 功能描述:Dual Channel 200mA LDO Regulator |
| YB1220ST26TBA | 制造商:YOBON 制造商全称:YOBON 功能描述:Dual Channel 200mA LDO Regulator |
| YB1220ST26TBB | 制造商:YOBON 制造商全称:YOBON 功能描述:Dual Channel 200mA LDO Regulator |
| YB1220ST26TBY | 制造商:YOBON 制造商全称:YOBON 功能描述:Dual Channel 200mA LDO Regulator |
| YB1220ST26TY | 制造商:YOBON 制造商全称:YOBON 功能描述:Dual Channel 200mA LDO Regulator |
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