SI9165_07 Datasheet, PDF (1/10 Pages) Vishay Siliconix – High Frequency 600-mA Synchronous Buck/Boost Converter

Si9165
Vishay Siliconix
High Frequency 600-mA Synchronous Buck/Boost Converter
DESCRIPTION
The Si9165 provides fully integrated synchronous buck or
boost converter solution for the latest one cell Lithium Ion
cellular phones. Capable of delivering up to 600 mA of output
current at + 3.3 V, the Si9165 provides ample power for
various baseband circuits as well as for some PAs. It
combines the 2 MHz switching controller with fully integrated
high-frequency MOSFETs to deliver the smallest and most
efficient converter available today. The 2 MHz switching
frequency reduces the inductor height to new level of 2 mm
and minimizes the output capacitance requirement to less
than 10 µF with peak-to-peak output ripple as low as 10 mV.
Combined with low-gate charge high-frequency MOSFETs,
the Si9165 delivers efficiency up to 95 %. The programmable
pulse skipping mode maintains this high efficiency even
during the standby and idle modes to increase overall battery
life and talktime. In order to extract the last ounce of power
from the battery, the Si9165 is designed with 100 % duty
cycle control for buck mode. With 100 % duty cycle, the
Si9165 operates like a saturated linear regulator to deliver
the highest potential output voltage for longer talktime.
The Si9165 is available in lead (Pb)-free TSSOP-20 pin
packages. In order to satisfy the stringent ambient
temperature requirements, the Si9165 is rated to handle the
industrial temperature range of - 25 °C to 85 °C.
STANDARD APPLICATION CIRCUITS
V_IN
2.7 to 6 V
V_OUT
0 to 600 mA
V_DD
MODE
COIL V_O
V_S
V_IN/OUT
FB
SHUTDOWN COMP
PWM/PSM
SYNC
R_OSC
REF
PGND GND
FEATURES
• Voltage Mode Control
• Fully Integrated MOSFET Switches
• 2.7 V to 6 V Input Voltage Range
RoHS
• Programmable PWM/PSM Control
COMPLIANT
- Up to 600 mA Output Current at 3.3 V in PWM
- Up to 2 MHz Adjustable Switching Frequency in PWM
- Less than 200 µA Quiescent Current in PSM
• Integrated UVLO and POR
• Integrated Soft-Start
• Synchronization
• Shutdown Current < 1 µA
V_IN
2.7 to 6 V
V_S V_IN/OUT
V_O
COIL
V_DD
MODE
PGND
FB
COMP
SHUTDOWN
PWM/PSM
R_OSC
REF
SYNC _{PGND GND}
V_OUT
0 to 600 mA
Boost Configuration
Document Number: 70845
S-72058-Rev. D, 08-Oct-07
Buck Configuration
www.vishay.com
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