世微 AP8232 DC-DC同步升压芯片 升压恒压IC 升压20V 电流2A

详情描述：

Description：
The AP8232 series is a CMOS step-up
switching regulator which mainly consists of a
reference voltage source, an oscillation circuit,
an error amplifier, a phase compensation circuit,
a PWM/PFM switching control circuit. With an
external low-ON-resistance Nch Power MOS,
this product is applicable to applications
requiring high efficiency and high output current.
The AP8232 series switches its operation to the
PFM control circuit whose duty ratio is 15 % with
to the PWM/PFM switching control circuit under
a light load and to prevent decline in the
efficiency by IC operation current.
Feature：
 Low voltage operation: Start-up is guaranteed from
0.9 V(IOUT =1 mA )
 Duty ratio: Built-in PWM/PFM switching control
circuit 15 to 78 % .
 oscillator frequency：300KHz
 External parts: coil, diode, capacitor, and transistor
 Output voltage range: 1.5V ~6.5 V
 Output voltage accuracy：?2%
 Soft start function: 2 ms.
PACKAGE：SOT-23-5
Typical Application:
 Mobile phones (PDC, GSM, CDMA, IMT200 etc.)
 Bluetooth equipment
 PDA
 Portable communication modem
 Portable games
 Cameras
 Digital cameras
 Cordless phones
 Notebook computers