SI9165_07 Datasheet, PDF (5/10 Pages) Vishay Siliconix – High Frequency 600-mA Synchronous Buck/Boost Converter

Si9165
Vishay Siliconix
TYPICAL CHARACTERISTICS 25 °C, unless otherwise noted
800
250
700
200
600
500
150
400
100
300
200
2
3
4
5
6
7
V_DD - (V)
PWM Supply Current
50
2
3
4
5
6
7
V_DD - (V)
PSM Supply Current
PIN CONFIGURATION AND ORDERING INFORMATION
NC
SD
PWM/PSM
V_IN/OUT
V_IN/OUT
V_IN/OUT
SYNC
GND
V_REF
FB
TSSOP-20
1
20
2
19
3
18
4
17
5
16
6 ^Si9165BQ 15
7
14
8
13
9
12
10
11
COIL
COIL
MODE
PGND
PGND
V_S
V_O
V_DD
R_OSC
COMP
ORDERING INFORMATION
Part Number
Temperature Range
Si9165BQ-T1-E3
- 25 to 85 °C
Package
Tape and Reel
Eval Kit
Si9165DB
Temperature Range
- 25 to 85 °C
Board Type
Surface Mount
Top View
PIN DESCRIPTION
Pin Number Name
Function
1
N/C Not Used
2
SD
Shuts down the IC completely and decreases current consumed by the IC to < 1 µA.
3
PWM/PSM Logic high = PWM mode, logic low = PSM mode. In PSM mode, synchronous rectification is disabled.
4, 5, 6
V_IN/OUT Input node for buck mode and output node for boost mode.
Externally controlled synchronization signal. Logic high to low transition forces the clock synchronization. If not
7
SYNC _{used, the pin must be connected to VDD, or logic high.}
8
GND Low power controller ground
9
V_REF 1.3 V reference. Decoupled with 0.1 µF capacitor.
10
FB
Output voltage feedback connected to the inverting input of an error amplifier.
11
COMP Error amplifier output for external compensation network.
12
Rosc External resistor to determine the switching frequency.
13
V_DD
Input supply voltage for the analog circuitry. Input voltage range is 2.7 V to 6 V.
14
V_O
Direct output voltage sensing to control peak inductor current in PSM mode.
15
V_S
Supply voltage for the internal MOSFET drive circuit.
16, 17
PGND Power ground.
18
MODE Determines the converter topology. Connect to AGND for buck or V_DD for boost.
19, 20
COIL Inductor connection node
Document Number: 70845
S-72058-Rev. D, 08-Oct-07
www.vishay.com
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