UNISONIC TECHNOLOGIES CO., LTD
P1786
PWM CONTROL 3A
STEP-DOWN CONVERTER
DESCRIPTION
UTC
P1786
consists of 3A step-down switching regulator
control which include a reference voltage source, oscillation
circuit, error amplifier, internal PMOS and etc with PWM.
UTC
P1786
can provide low-ripple power, high efficiency,
and excellent transient characteristics. An enable function, an
over current protect and short circuit protect function are built
inside, so the operation frequency can be reduced from
300KHz to 30KHz when OCP or SCP happens. The PWM
control circuit can vary the duty ratio linearly from 100 down to
0%. This converter also includes an error amplifier circuit as
well as a soft-start circuit that prevents overshoot at startup.
Also, to minimum external component counts for an internal
compensation block is built in.
These ICs can work as step-down switching regulators with
the addition of an internal P-channel Power MOS, a coil,
capacitors, and a diode connected externally. They provides
such outstanding features: low current consumption. It is also
suitable for the operation via an AC adapter because this
converter accommodate an input voltage up to 23V.
LINEAR INTEGRATED CIRCUIT
SOP-8
*Pb-free plating product number: P1786L
FEATURES
* Input voltage: 3.6V ~ 23V
* Output voltage: 0.8V ~ V
CC
* Duty ratio: 0% to 100% PWM control
* Oscillation frequency: 300KHz typ.
* Soft-start, current limit, enable function
* Thermal shutdown function
* Built-in internal SW P-channel MOS
ORDERING INFORMATION
Ordering Number
Normal
Lead Free Plating
P1786-S08-R
P1786L-S08-R
P1786-S08-T
P1786L-S08-T
Package
SOP-8
SOP-8
Packing
Tape Reel
Tube
www.unisonic.com.tw
Copyright 漏 2007 Unisonic Technologies Co., Ltd
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