Description
GND pin Reference voltage source pass capacitor connection pin Soft-start capacitor connection pin Shutdown pin “H” : Normal operation (step-up operating) “L” : Entire circuit stopped (step-up stopped) IC power supply pin Output voltage fixed output type : Output voltage monitoring pin [Output voltage external setting type : Feedback pin] External transistor connection pin Current limit detection pin
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Seiko Instruments Inc.www.DataSheet4U.com
STEP-UP, 600 kHz, PWM CONTROL
Features
- s.
- Oscillation frequency : 600 kHz (A and B types), 300 kHz (C and D types). Output voltage : Selectable in 0.1 V steps between 2.5 to 6.0 V (output voltage fixed output type) Output voltage accuracy : ±2.0% Output voltage external setting (FB) type available. FB terminal voltage (VFB) 1.0 V External parts : Coil, diode, capacitors (3), transistor, and resistor only Duty ratio : 0 to 82% (typ. ) PWM control (S-8340 Series) 27 to 82% (typ.
S-8340_SeikoInstrumentsUSA.pdf