IC-DC_17 Datasheet, PDF (1/19 Pages) IC-Haus GmbH – 2-CHANNEL BUCK/BOOST DC/DC CONVERTER

iC-DC
2-CHANNEL BUCK/BOOST DC/DC CONVERTER
Rev B1, Page 1/19
FEATURES
• 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, overvoltage, and
undervoltage at the current-limited open-collector output
• Wide temperature range of -40 °C to 105 °C
• Protective circuitry against ESD
• Space saving 24-pin QFN package
APPLICATIONS
• Dual voltage supply by
buck/boost converters with
adjustable, back-end linear
regulators
• Power management for laser,
encoder, and automotive
applications
PACKAGES
QFN24 4 mm x 4 mm
(RoHS compliant)
BLOCK DIAGRAM
4...36V _CVB
1μF
CVBR
10μF
VB
VBR
LVBH
22μH
VBL VHL
REVERSE
P ROTE CT.
INTERNAL
S UP P LY
VBROK
NAUT
TOK
VOLTAGE
MONITOR
AUTARKY
DETECT.
THERMAL
SHUTDOWN
ERROR DETECT.
RREF
20k
RREF
BIAS
OSCILLATOR
REFERENCE
VCC1
VCC2
ENV1
ENV2
R1 _R3
R2
R4
CFG1
CFG2
OUTP UT
ENABLE
CONFIGURATION
VCC1:
5V/3.3V/R1:R2
VCC2:
3.3V/2.5V/R3:R4
BUCK
BOOST
CONTROL
SWITCHING REGULATOR
iC-DC
GNDA GND
VH
VH1
1
LIN.-REG.1
VCC1
1
POE1
SUPPLY
SWITCH 1
VH2
VCC2
2
2
LIN.-REG.2
VCC1,VCC2
TEST
&
VOLTAGE
MONITORING
SUPPLY
SWITCH 2
POE2
V1OK
1
V2OK
2
CVH
3.3μF
CVH1
3.3μF
1.5...5.5V
CVCC1
1μF
CVH2
3.3μF
1.5...5.5V
CVCC2
1μF
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http://www.ichaus.com