ZCC2139 升压驱动芯片替代ME2139
DescriptionThe Z CC2139 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 Z CC 2139 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：1.0MHz
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：SOT23-5
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