S-8353/8354 Series
www.ablic.com © ABLIC Inc., 2002-2023
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE
BUILT-IN TRANSIS...
S-8353/8354 Series
www.ablic.com © ABLIC Inc., 2002-2023
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE
BUILT-IN
TRANSISTOR SWITCHING
REGULATOR
Rev.3.2_00
The S-8353/8354 Series is a CMOS step-up switching
regulator which mainly consists of a reference voltage source, an oscillation circuit, a power MOS FET, an error amplifier, a phase compensation circuit, a PWM control circuit (S-8353 Series) and a PWM / PFM switching control circuit (S-8354 Series). The S-8353/8354 Series can configure the step-up switching
regulator with an external coil, capacitor, and diode. In addition to the above features, the small package and low current consumption make the S-8353/8354 Series ideal for portable equipment applications requiring high efficiency. The S-8353 Series realizes low ripple, high efficiency, and excellent transient characteristics due to its PWM control circuit whose duty ratio can be varied linearly from 0% to 83% (from 0% to 78% for 250 kHz models), an excellently designed error amplifier, and phase compensation circuits. The S-8354 Series features a PWM / PFM switching controller that can switch the operation to a PFM controller with a duty ratio is 15% under a light load to prevent a decline in the efficiency due to the IC operating current.
Features
Low voltage operation: Startup at 0.9 V min. (IOUT = 1 mA) guaranteed
Low current consumption : During operation 18.7 μA (3.3 V, 50 kHz, typ.) During shutdown: 0.5 μA (max.)
Duty ratio : Built-in PWM / PFM switchi...