www.DataSheet.co.kr
iC-DC
preliminary
Rev A3, Page 1/19
2-CHANNEL BUCK/BOOST DC/DC CONVERTER
FEATURES o o o o Wide i...
www.DataSheet.co.kr
iC-DC
preliminary
Rev A3, Page 1/19
2-CHANNEL BUCK/BOOST DC/DC CONVERTER
FEATURES o o o o Wide input
voltage range of +4 to +36 V Reverse polarity protection up to -36 V with autarky function Universal buck/boost converter with high efficiency Two back-end, adjustable linear regulators (1.5 V to 5.5 V) with a total of up to 300 mA of output current and a separate output
voltage monitor Low residual ripple with small
capacitors in the µF range Separate enable inputs for the linear regulators Two switched linear regulator outputs Integrated switching transistors and flyback diodes Converter cut-off current can be set by an external resistor Integrated 3 MHz oscillator with no external components Active noise spectrum reduction Error messaging with overtemperature, over
voltage, and under
voltage at the current-limited open-collector output Wide temperature range of -40 °C to 125 °C Protective circuitry against ESD Space saving 24-pin QFN package
APPLICATIONS o Dual
voltage supply by buck/boost converters with adjustable, back-end linear regulators o Power management for laser, encoder, and automotive applications
o o o o o o o o o o o
PACKAGES
QFN24 4 mm x 4 mm (RoHS compliant)
BLOCK DIAGRAM
LVBH 4...36V CVB 1μF
VB
CVBR 10μF
VBR
22μH
VBL VHL VH
REVERSE PROTECT. INTERNAL SUPPLY
CVH 3.3μF
VH1
VBROK NAUT TOK
VOLTAGE MONITOR AUTARKY DETECT. THERMAL SHUTDOWN ERROR DETECT.
VCC1
BUCK
1
CVH1 3.3μF 1.5...5.5V CVCC1 1μF
POE1
SUPPLY SWITCH 1
BOOST
1
LIN...