End of Life. Last Available Purchase Date is 31-Dec-2014
Si9166
Vishay Siliconix
High Frequency Programmable Topology Controller
FEATURES
D
D
D
D
Buck or Boost Configuration
Voltage Mode Control
2.7-V to 6-V Input Voltage Range for V
DD
and V
S
Programmable PWM/PSM Control
−
Up to 2-MHz Switching Frequency in PWM
−
Synchronous Rectification in PWM
−
Less than 200-mA I
DD
in PSM
D
D
D
D
Integrated UVLO and POR
Integrated Soft-Start
Synchronization
Shutdown Current <1
mA
DESCRIPTION
The Si9166 is a programmable topology controller for today’s
continuous changing portable electronic market. Si9166
provides flexibility of utilizing various battery configurations
and chemistries such as NiCd, NiMhy, or Li+ with input voltage
range of 2.7 V to 6 V. An additional flexibility is provided with
topology programmability to power multiple loads such as
power amplifiers, microcontrollers, or baseband logic IC’s.
The converters can be programmed to be synchronous Buck
or Boost topology. For ultra-high efficiency, converters are
designed to operate in synchronous rectified PWM mode
under full load while transforming into externally controlled
pulse skipping mode (PSM) under light load. All these features
are provided by the Si9166 without sacrificing system
integration requirements of fitting these circuits into ever
demanding smaller and smaller space. The Si9166 is capable
of switching up to 2 MHz to minimize the output inductor and
capacitor size in order to decrease the overall converter size.
The Si9166 is available in both standard and lead (Pb)-free
TSSOP-16 pin packages and specified to operate over the
industrial temperature range of
−25_C
to 85_C.
TYPICAL APPLICATION CIRCUITS
V
IN
V
OUT
Si6803
V
IN
D
S
1
S
1
D
S
2
S
2
V
OUT
Si6803
D
S
1
S
1
D
S
2
S
2
G
1
G
2
G
1
G
2
SD
SD
Si9166
V
S
N/C
PWM/PSM
SYNC
N/C
DH
SYNC
GND
REF
FB
MODE
SD
DL
PWM/PSM
SYNC
V
O
V
DD
R
OSC
COMP
N/C
V
S
N/C
DH
Si9166
MODE
SD
DL
V
O
V
DD
R
OSC
COMP
PWM/PSM PGND
PWM/PSM PGND
SYNC
GND
REF
FB
Buck Configuration
Document Number: 70847
S-40701—Rev. C, 19-Apr-04
Boost Configuration
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1
Si9166
Vishay Siliconix
ABSOLUTE MAXIMUM RATINGS
Voltages Referenced to GND
V
DD
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.5 V
MODE, PWM/PSM, SYNC, SD, V
REF
, R
OSC
COMP, FB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
−0.3
V to V
DD
+ 0.3 V
V
O
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
−0.3
V to V
S
+ 0.3 V
PGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
"0.3
V
Voltages Referenced to PGND
V
S.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.5 V
DH, DL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
−0.3
V to V
S
+ 0.3 V
Peak Output Current (DH, DL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5 A
Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
−65_C
to 150_C
Operating Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150_C
Power Dissipation (Package)
a
16-Pin TSSOP (Q Suffix)
b
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 925 mW
Thermal Impedance (q
JA
)
16-Pin TSSOP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135_C/W
Notes
a. Device mounted with all leads soldered or welded to PC board.
b. Derate 7.4 mW/
_
C above 25
_
C.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation
of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect device reliability.
RECOMMENDED OPERATING CONDITIONS
Voltages Referenced to AGND
V
DD
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.7 V to 6 V
MODE, PWM/PSM, SYNC, SD . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 V to V
DD
Voltages Referenced to PGND
V
S
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.7 V to 6 V
F
osc
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200 kHz to 2 MHz
R
osc
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 kW to 300 kW
V
REF
Capacitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.1
mF
SPECIFICATIONS
Test Conditions
Unless Otherwise Specified
Parameter
Reference
Output Voltage
Load Regulation
Power Supply Rejection
V
REF
DV
REF
P
SRR
I
REF
= 0A
I
REF
= 0, T
A
= 25°C
V
DD
= 3.3 V,
−500
µA
< I
REF
<0
1.268
1.280
1.3
1.3
3
60
1.332
1.320
V
mV
dB
Limits
Min
a
Typ
b
Max
a
Unit
Symbol
2.7 V
v
V
DD
, V
S
v
6 V
UVLO
Under Voltage Lockout (turn-on)
Hysteresis
V
UVLOLH
V
HYS
V
UVLOLH
−
V
UVLOHL
2.3
2.4
0.1
2.5
V
Soft-Start Tim
SS time
tss
6
mS
Mode
Logic High
Logic Low
Input Current
V
IH
V
IL
I
L
−1.0
0.7 V
DD
0.3 V
DD
1.0
V
mA
SD, SYNC, PWM/PSM
Logic High
Logic Low
Input Current
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V
IH
V
IL
I
L
−1.0
2.4
0.8
1.0
V
mA
2
Document Number: 70847
S-40701—Rev. C, 19-Apr-04
Si9166
Vishay Siliconix
SPECIFICATIONS
Test Conditions
Unless Otherwise Specified
Parameter
Oscillator
Maximum Frequency
Accuracy
Maximum Duty Cycle—Buck
Maximum Duty Cycle—Boost
SYNC Range
SYNC Low Pulse Width
SYNC High Pulse Width
SYNC t
r
, t
f
D
MAX
F
SYNC
/F
OSC
F
OSC
Nominal 1.60 MHz, R
OSC
= 30 kW
F
sw
= 2 MHz (non LDO mode)
F
sw
= 2 MHz
2
−20
75
52
1.2
50
50
50
ns
85
65
1.5
20
%
MHz
Limits
Min
a
Typ
b
Max
a
Unit
Symbol
2.7 V
v
V
DD
, V
S
v
6 V
Error Amplifier
Input Bias Current
Open Loop Voltage Gain
FB Threshold
Unity Gain BW
Output Current
Power Supply Rejection
I
BIAS
A
VOL
V
FB
BW
I
EA
PSRR
Source (V
FB
= 1.05 V), V
COMP
= 0.75 V
Sink (V
FB
= 1.55 V), V
COMP
= 0.75 V
1
T
A
= 25_C
V
FB
= 1.4 V
−1
50
1.270
1.258
60
1.30
1.30
2
−3
3
60
−1
1.330
1.342
1
mA
dB
V
MHz
mA
dB
Output Drive (DH and DL)
Output High Voltage
Output Low Voltage
Peak Output Source
Peak Output Sink
Break-Before-Make
V
OH
V
OL
I
SOURCE
I
SINK
t
BBM
V
S
= 3.3 V, I
OUT
=
−20
mA
V
S
= 3.3 V, I
OUT
= 20 mA
V
S
= 3.3 V DH = DL = V
S
/2
3 3 V,
V
S
= V
DD
= 3.3 V
3.18
3.24
0.06
−750
500
750
30
0.12
−500
V
mA
ns
Supply
Normal Mode
PSM Mode
Shutdown Mode
I
DD
V
DD
= 3.3 V, F
OSC
= 2 MHz
V
DD
= 3.3 V
V
DD
= 3.3 V, SD = 0 V
500
180
750
250
1
mA
Notes
a. The algebraic convention whereby the most negative value is a minimum and the most positive a maximum.
b. Typical values are for DESIGN AID ONLY, not guaranteed nor subject to production testing.
Document Number: 70847
S-40701—Rev. C, 19-Apr-04
www.vishay.com
3
Si9166
Vishay Siliconix
TYPICAL CHARACTERISTICS (25_C UNLESS OTHERWISE NOTED)
1.310
V
REF
vs. V
DD
1.32
V
REF
vs. Temperature
1.305
V
REF
(V)
V
REF
(V)
1.31
1.300
1.30
1.295
1.29
1.290
2.0
2.5
3.0
3.5
4.0
V
DD
−
(V)
4.5
5.0
5.5
6.0
1.28
−50
0
50
Temperature (_C)
100
150
2.00
1.95
1.90
Frequency vs. Temperature
10000
Frequency vs. R
OSC
Frequency (MHz)
R
OSC
= 25 kW
Frequency (kHz)
1.85
1.80
1.75
1.70
−100
1000
100
−50
0
50
100
150
10
100
R
OSC
(kW)
1000
Temperature (_C)
Buck Mode Efficiency, V
O
= 2.7 V
100
PSM−3 V
Boost Mode Efficiency, V
O
= 3.6 V
100
PWM−3.3 V
PSM−3.3 V
90
Effocoemcu (%)
PSM−3.3 V
PSM−3.6 V
PWM−3 V
90
Effocoemcu (%)
PSM−3 V
80
PWM−3.3 V
PWM−3.6 V
80
PSM−2.7 V
PWM−3 V
PWM−2.7 V
70
70
60
60
50
1
10
100
1000
Load Current (mA)
50
1
10
100
1000
Load Current (mA)
Document Number: 70847
S-40701—Rev. C, 19-Apr-04
www.vishay.com
4
Si9166
Vishay Siliconix
TYPICAL CHARACTERISTICS (25_C UNLESS OTHERWISE NOTED)
PWM Supply Current
800
700
200
600
I
DD
(mA)
500
400
100
300
200
2
3
4
5
6
7
V
DD
−
(V)
50
2
3
4
5
V
DD
−
(V)
6
7
I
DD
(mA)
150
250
PSM Supply Current
PIN CONFIGURATION
TSSOP-16
V
S
N/C
DH
PWM/PSM
SYNC
GND
V
REF
FB
1
2
3
4
5
6
7
8
Top View
16
15
14
13
12
11
10
9
MODE
SD
DL
PGND
V
O
V
DD
R
OSC
COMP
ORDERING INFORMATION
Part Number
Si9166BQ-T1
Si9166BQ-T1—E3
Temperature Range
−25
to 85_C
25
Package
Tape and Reel
Eval Kit
Si9166DB
Temperature Range
−25
to 85_C
Board Type
Surface Mount
PIN DESCRIPTION
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Symbol
V
S
N/C
DH
PWM/PSM
SYNC
GND
V
REF
FB
COMP
R
OSC
V
DD
V
O
PGND
DL
SD
MODE
Not Used
Description
Input supply voltage for the output driver section. Input voltage range is 2.7 V to 6V
The gate drive output for the high-side p-channel MOSFET. The p-channel MOSFET is the main switch for buck topology
and the synchronous rectifier for the boost topology.
Logic high = PWM mode, logic low = PSM mode. In PSM mode, synchronous rectification is disabled.
Externally controlled synchronization signal. Logic high to low transition forces the clock synchronization. If not used, the
pin must be connected to V
DD
, or logic high.
Low power controller ground
1.3-V reference. Decoupled with 0.1-mF 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 circuit. Input voltage range is 2.7 V to 6 V.
Direct output voltage sense
Power ground for output drive stage
The gate drive output for the low-side n-channel MOSFET. The n-channel MOSFET is the synchronous rectifier for the buck
topology and the main switch for the boost topology.
Shuts down the IC completely and decreases current consumed by the IC to < 1
mA.
Determines the converter topology. Connect to AGND for Buck or V
DD
for Boost.
www.vishay.com
Document Number: 70847
S-40701—Rev. C, 19-Apr-04
5
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