SI9169_07 VISHAY [Vishay Siliconix], SI9169_07 Datasheet - Page 5

• Manufacturer Part Number: SI9169_07
• Description: High Frequency 1-A Synchronous Buck/Boost Converter
• Manufacturer: VISHAY [Vishay Siliconix]

TYPICAL CHARACTERISTICS 25 °C, unless otherwise noted
PIN CONFIGURATION AND ORDERING INFORMATION
Document Number: 70945
S-72058-Rev. E, 08-Oct-07
PIN DESCRIPTION
Pin Number
4, 5, 6
16, 17
19, 20
10
11
12
13
14
15
18
1
2
3
7
8
9
800
700
600
500
400
300
200
PWM/PSM
2
V
V
V
IN/OUT
IN/OUT
IN/OUT
SYNC
V
GND
GND
PWM/PSM Logic high = PWM mode, logic low = PSM mode. In PSM mode, synchronous rectification is disabled.
REF
SD
V
FB
COMP
MODE
PGND
Name
SYNC
V
Rosc
COIL
GND
GND
IN/OUT
V
SD
FB
V
V
REF
DD
O
S
3
PWM Supply Current
1
2
3
4
5
6
7
8
9
10
Low power controller ground. Can be left unconnected for load currents below 600 mA.
Shuts down the IC completely and decreases current consumed by the IC to < 1 µA.
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
used, the pin must be connected to V
Low power controller ground
1.3 V reference. Decoupled with 0.1 µF capacitor.
Output voltage feedback connected to the inverting input of an error amplifier.
Error amplifier output for external compensation network.
External resistor to determine the switching frequency.
Input supply voltage for the analog circuitry. Input voltage range is 2.7 V to 6 V.
Direct output voltage sensing to control peak inductor current in PSM mode.
Supply voltage for the internal MOSFET drive circuit.
Power ground.
Determines the converter topology. Connect to AGND for buck or V
Inductor connection node
TSSOP-20
4
Top View
Si9169
V
DD
- (V)
5
20
19
18
17
16
15
14
13
12
11
6
COIL
COIL
MODE
PGND
PGND
V
V
V
R
COMP
S
O
DD
OSC
7
DD
, or logic high.
ORDERING INFORMATION
Si9169BQ-T1-E3
Si9169DQ-T1-E3
Part Number
Function
250
200
150
100
50
2
DD
3
for boost.
Temperature Range
PSM Supply Current
- 25 to 85 °C
- 40 to 85 °C
4
V
DD
Vishay Siliconix
- (V)
5
www.vishay.com
Tape and Reel
Si9169
6
Package
7
5