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

iC-DC
preliminary
2-CHANNEL BUCK/BOOST DC/DC CONVERTER
Rev A3, Page 1/19
FEATURES
o Wide input voltage range of +4 to +36 V
o Reverse polarity protection up to -36 V with autarky function
o Universal buck/boost converter with high efficiency
o 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
o Low residual ripple with small capacitors in the µF range
o Separate enable inputs for the linear regulators
o Two switched linear regulator outputs
o Integrated switching transistors and flyback diodes
o Converter cut-off current can be set by an external resistor
o Integrated 3 MHz oscillator with no external components
o Active noise spectrum reduction
o Error messaging with overtemperature, overvoltage, and
undervoltage at the current-limited open-collector output
o Wide temperature range of -40 °C to 125 °C
o Protective circuitry against ESD
o 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
PACKAGES
QFN24 4 mm x 4 mm
(RoHS compliant)
BLOCK DIAGRAM
4...36V _CVB
1μF
CVBR
10μF
VB
VBR
LVBH
22μH
VBL VHL
REVERSE
PROTECT.
INTERNAL
SUPPLY
VBROK
NAUT
TOK
VOLTAGE
MONITOR
AUTARKY
DETECT.
THERMAL
SHUTDOW N
ERROR DETECT.
RREF
20k
RREF
BIAS
OSCILLATOR
REFERENCE
VCC1
VCC2
ENV1
ENV2
R1
R3
R2
R4
CFG1
CFG2
OUTPUT
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
Copyright © 2011 iC-Haus
http://www.ichaus.com