SIP12502 Datasheet, PDF (1/11 Pages) Vishay Siliconix – 500 mA - Fixed Output Boost Converter for Single or Dual Cell

SiP12502
Vishay Siliconix
500 mA - Fixed Output Boost Converter for Single or Dual Cell
DESCRIPTION
SiP12502 is a boost converter IC with fixed output voltage for
single or double cell NiMH or Alkaline battery pack. Featuring
with an internal low resistance power MOSFET, it is capable
of starting up with a low battery voltage of 0.85 V. It only
needs four external components (an inductor, a diode and
two capacitors) to construct a step-up converter. For best
efficiency performance, it is designed to operate in PWM
mode with a 300 kHZ switching frequency under normal load
and in PFM mode under light load. The voltage-mode control
loop is internally compensated, simplifying converter design
and reducing external parts count. It accepts input voltages
from 0.85 V to 5 V, providing fixed output voltages of 2.0 V,
3.3 V, and 5.0 V. It also features low shutdown current of
under 1 µA, over voltage protection, thermal shutdown
protection, a power good output and antiringing control to
minimize EMI.
SiP12502 is available in a lead (Pb)-free 6-pin, PowerPAK
MLP33 package and is specified to operate over the
industrial temperature range of - 40 °C to 85 °C.
TYPICAL APPLICATION CIRCUIT
FEATURES
• Voltage mode control with internal frequency
compensation
• 0.85 V to 5.0 V input voltage range
• Fixed output voltage options - 2.0 V, 3.3 V, and 5.0 V
• Other voltages available upon request
• PWM control with 300 kHz fixed switching frequency
• PFM control for light load
• Powered from the output voltage supply
• Integrated UVLO and soft-start
• Logic controlled shutdown (< 1 µA)
• 85 % typical efficiency
• Internal power MOS switch: 0.2 Ω at 3.3 V output
• Antiringing switch to minimize EMI
• Power good output
• Shutdown input
• Minimum external components
• PowerPAK^® MLP33-6 package, (DFN-6, 3 x 3)
• Over voltage protection
APPLICATIONS
• Portable applications
• Battery-powered equipment
• Handheld devices
• Digital cameras
• Wireless handsets
• LCD and OLED bias
V_IN
10 µF
XSHD
2
V_IN
1
XSHD
10 µH
6
LX
MBR0520
SiP12502
3
V_OUT
4
PGOOD
GND
5
PGOOD
330 KΩ
47 µF
V_OUT
Document Number: 73578
S09-1456-Rev. B, 03-Aug-09
www.vishay.com
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