Dual Output Step-Up/Inverting DC/DC Converter XC9519 Series

8F Sakura Nihonbashi Bldg.,
1-13-12, Nihonbashikayaba-cho,
Chuo-ku, Tokyo
103-0025
Japan
PRESS RELEASE
TRX078 October 19th, 2011
Dual Output Step-Up/Inverting DC/DC Converter
XC9519 Series
TOREX SEMICONDUCTOR LTD. (Tokyo Japan: President, Tomoyuki Fujisaka) has developed a dual output
step-up/inverting DC/DC converter XC9519 series.
The XC9519 series is 2-ch step-up/inverting DC/DC converter. Using external components, the step-up DC/DC
converter can be set to any desired voltage up to 18V, and the inverting DC/DC converter can be set to any desired
voltage down to -15V. The switching frequency is a high 1.2MHz, enabling the use of small external components.
The input voltage range is 2.7V to 5.5V. The output current is 500mA (VIN=3.7V, VOUTP=5.0V, VOUTN=-5.0V). PWM
control and automatic PWM/PFM switching control can be selected for the operation modes. The switching frequency of
PWM control is fixed, thereby reducing noise. Automatic PWM/PFM switching control switches from PWM control to
PFM control when the load is light to achieve high efficiency across the entire load range, from light loads to high output
currents.
The step-up DC/DC converter has a built-in soft start time of 2.5ms (TYP.), while the inverting DC/DC converter’s soft
start time is 2.2ms (TYP.). The supply current is 1.0μA or less in standby. A gate control circuit for an external P-ch
MOS FET for load cut-off is incorporated. By adding an external P-ch MOS FET, the load can easily be cut-off in standby.
Protective circuits include driver Tr current limiting (2A MIN.) and thermal shutdown. A UVLO function that forces the
driver Tr. off at an input voltage of 2.2V or less is also incorporated. The IC is housed in a small QFN-24 (4.0 x 4.0 x h0.8
mm) package.
【XC9519 Series Features】
● 2-ch type consisting of step-up and inverting DC/DC converters.
● The switching frequency is a high 1.2MHz, enabling the use of small external components.
● The input voltage range is 2.7V to 5.5V. The output current is 500mA (VIN=3.7V, VOUTP=5.0V, VOUTN=-5.0V).
● A gate control circuit for an external P-ch MOS FET for load cut-off is incorporated, enabling easy cut off of the load in standby.
● Soft start, current limiting, thermal shutdown, and UVLO functions are included.
SBDP
LP
VOUTP
CFBP
SWP
P-ch MOS
LXP
BSW
PVIN
ENP
CIN_SW CIN_P
CIN_A
RFBN2
CLP
CL_VR
RFBP2
FBN
XC9519
ENN
MODE
RFBN1
VOUTN
VOUTN
AGND
PGND
▲XC9519 Series QFN-24 (4.0 x 4.0 xh0.8mm)
RSP
VREF
AVIN
VIN
RFBP1
VOUTP
FBP
LXN
GAINP
GAINN
RZP
RZN
CZP
CZN
SBDN
CLN
LN
▲XC9519 Series Typical Application Circuit
Torex Semiconductor Ltd. is a leading provider of CMOS power management ICs targeted toward battery powered and energy efficient
applications. Torex specializes in CMOS analog technology, with LDO voltage regulators, voltage detectors and DC/DC converters
making up our core product offering.
http://www.torex.co.jp/english/
For further information, please contact:
Singapore: TOREX SEMICONDUCTOR (S) PTE LTD
Tel: +65-6745-1352
USA: TOREX USA Corp.
Tel: +1-949-261-2022 E-mail: info@torex-usa.com
E-mail: tsp@torex.com.sg
Europe: TOREX SEMICONDUCTOR EUROPE LIMITED
Tel: +44-1530-510190 E-mail: sales@torexsemi.co.uk
2011/10/19
TOREX SEMICONDUCTOR LTD.