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SI9168 Datasheet(PDF) 6 Page - Vishay Siliconix

Part No. SI9168
Description  Synchronous Buck or Boost Controller for 2-Cell Li Battery Operated Portable Communication Devices
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Maker  VISHAY [Vishay Siliconix]
Homepage  http://www.vishay.com
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SI9168 Datasheet(HTML) 6 Page - Vishay Siliconix

 
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16
15
14
13
1
2
3
4
12
11
10
9
5
6
7
8
MODE
VS
DL
N/C
PGND
DH
SD
PWM/PSM
VO
SYNC
VDD
GND
ROSC
VREF
COMP
FB
TSSOP-16
Top View
Si9168BQ
Si9168
Vishay Siliconix
New Product
www.siliconix.com
S FaxBack 408-970-5600
6
Document Number: 70899
S-00022—Rev. A, 10-Jan--00
PIN CONFIGURATION
ORDERING INFORMATION
Part Number
Temperature Range
Package
Si9168BQ-T1
–25 to 85
_C
Tape and Reel
Eval Kit
Temperature Range
Board Type
Si9168DB
–25 to 85
_C
Surface Mount
PIN DESCRIPTION
Pin Number
Name
Function
1
MODE
Determines the converter topology. Connect to AGND for buck or VDD for boost.
2
DL
The gate drive output for the low-side n-channel MOSFET for buck and boost converter
3
PGND
Power ground for output drive stage
4
SD
Logic low shuts down the IC completely and decreases the current consumption of IC to <2
mA.
5
VO
Direct output voltage sense
6
VDD
Input supply voltage for the analog circuit. VDD voltage should be the ac filtered voltage of VSS. Input voltage range
is 5 V to 10 V.
7
ROSC
External resistor to determine the switching frequency.
8
COMP
Error amplifier output for external compensation network.
9
FB
Output voltage feedback connected to the inverting input of an error amplifier.
10
VREF
1.3-V reference voltage. Connected internally to non-inverting error amplifier input. Decouple with 0.1-
mF ceramic
capacitor.
11
GND
Low power controller ground
12
SYNC
Externally controlled synchronization signal. Logic high to low transition forces the clock synchronization. If not used,
the pin must be connected to VDD, or logic high.
13
PWM/PSM
Logic high = PWM mode, logic low = PSM mode. In PSM mode, synchronous rectification drive is disabled.
14
DH
The gate drive output for the high-side p-channel MOSFET for buck and boost converter
15
N/C
Not used.
16
VS
Supply voltage for the output driver section. Voltage range is 5 V to 10 V (Buck), 5 to 12.6 V (Boost).


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