Buck Converter. Si9167 Datasheet

Si9167 Converter. Datasheet pdf. Equivalent

Si9167 Datasheet
Recommendation Si9167 Datasheet
Part Si9167
Description 600-mA Synchronous Buck Converter
Feature Si9167; Product is End of Life 3/2014 Si9167 Vishay Siliconix 600-mA Synchronous Buck Converter for 2-Cell.
Manufacture Vishay
Datasheet
Download Si9167 Datasheet




Vishay Si9167
Product is End of Life 3/2014
Si9167
Vishay Siliconix
600-mA Synchronous Buck Converter
for 2-Cell Li+ Cellular Phones
DESCRIPTION
The Si9167 provides a fully integrated synchronous buck
converter solution for the latest 2-cell Lithium Ion battery cel-
lular phones. Capable of delivering up to 600 mA of output
current, the Si9167 provides ample power for various Base-
band circuits as well as for some PAs.
The Si9167 combines the 2 MHz switching frequency 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 a
new level of less than 2 mm and minimizes the output capac-
itance requirement to less than 10 µF, with only 10 mV peak-
to-peak output ripple.
Combined with its integrated low gate charge high-frequency
MOSFETs and internal synchronous rectifier, the Si9167
delivers efficiency up to 95 %. The programmable pulse-
skipping mode maintains high efficiency even during the
standby mode to increase overall battery life and talk time. In
order to extract the last ounce of power from battery, Si9167
is designed with 100 % duty cycle capability for both PSM
and PWM operating modes. With 100 % duty cycle, Si9167
operates like a saturated linear regulator to deliver the high-
est potential output voltage.
The Si9167 is available in TSSOP-20 pin package. In order
to satisfy the stringent ambient temperature requirements,
Si9167 is specified over the industrial temperature range of
- 25 °C to 85 °C.
FUNCTIONAL BLOCK DIAGRAM
VIN
(5-10 V)
FEATURES
• Voltage Mode Control
• 5 V to 10 V Input Voltage Range
• Fully Integrated 600 mA MOSFET Switches
• Synchronous Rectifier Switch
• Synchronizable, Constant-Frequency PWM Mode
(up to 2 MHz)
• Programmable PWM/PSM Control
- Up to 600 mA Output Current in PWM with 950 µA
Quiescent Current
- Up to 150 mA Output Current in PSM with 200 µA
Quiescent Current
• Low Dropout Operation at Low
VIN - VOUT
• Integrated UVLO, POR and OTP
• Integrated Soft-Start
• Shutdown Current < 1 µA
• Power Good Comparator
1.3 V ~ 10 V
SMPS
VOUT (1.3 ~ 10 V)
PWR_GD INPUT
PWR_GD OUTPUT
SD
1.3 V
Voltage Reference
Power_Good
Comparator
Shutdown
Control
VREF (1.3 V)
Document Number: 70898
S-63920-Rev. C, 23-Aug-99
www.vishay.com
1



Vishay Si9167
Si9167
Vishay Siliconix
Product is End of Life 3/2014
ABSOLUTE MAXIMUM RATINGS
Parameter
Voltages Referenced to AGND
VDD
PWM/PSM, SYNC, CLK, SD, AIN, AO, VREF, ROSC, COMP, FB
VO
PGND
Voltages Referenced to PGND
VIN
COIL
Peak Output Current
Continuous Output Current
Storage Temperature
Operating Junction Temperature
Power Dissipation (Package)a
20-Pin TSSOP (Q Suffix)b
Thermal Impedance (ΘJA)
20-Pin TSSOP
Notes:
a. Device Mounted with all leads soldered or welded to PC board.
b. Derate 12.5 mW/°C above 25 °C.
Limit
13
- 0.3 V to VDD + 0.3 V
- 0.3 V to VS + 0.3 V
± 0.3
13
- 0.4 V to VS + 0.4 V
3
1
- 65 to 150
150
1.56
80
Unit
V
V
A
°C
W
°C/W
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 RANGE
Parameter
Voltages Referenced to AGND
VDD
Oscillator Frequency
ROSC
VOUT
PWM/PSM, SYNC, SD
VREF Capacitor
Voltages Referenced to PGND
VIN
Limit
5 V to 10 V
200 kHz to 2 MHz
20 kΩ to 300 kΩ
1.3 V to 10 V
0 V to VDD
0.1
0.5 V to 10 V
Unit
V
kΩ
V
V
µF
V
SPECIFICATIONS
Parameter
Reference
Output Voltage
VREF Current
VREF PSRR
UVLO
Under Voltage Lockout (Turn-On)
Hysteresis
Soft-Start Time
SS Time
Symbol
VREF
IREF
PSRR
tSS
Test Conditions
Unless Otherwise Specified
5 V VDD 10 V, VIN = VDD
IREF = 0
VDD = 7.2 V, IREF = 0, 25 °C
Limits
- 25 °C to 85 °C
Mina
Typb
Maxa
Unit
1.2675
1.280
1.3
1.3
- 0.5
60
1.3325
1.320
V
mA
dB
4.25 4.5 4.75
V
0.2
10 ms
www.vishay.com
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Document Number: 70898
S-63920-Rev. C, 23-Aug-99



Vishay Si9167
Product is End of Life 3/2014
Si9167
Vishay Siliconix
SPECIFICATIONS
Parameter
Symbol
Test Conditions
Unless Otherwise Specified
5 V VDD 10 V, VIN = VDD
Limits
- 25 °C to 85 °C
Mina
Typb
Maxa
Unit
SD, SYNC, PWM/PSM
Logic High
Logic Low
2.4
V
0.8
Oscillator
Maximum Frequency
Accuracy
Maximum Duty Cycle
(Non LDO Mode)
SYNC Range
SYNC Low Pulse Width
FMAX
DMAX
FSYNC/FOSC
1 % External Resistor
FSW = 2 MHz
FSYNC 2 MHz
- 20
80
1.2 1.5
50
2 MHz
20
%
SYNC High Pulse Width
SYNC tr, tf
Error Amplifier
tr, tf
(10 % to 90 %)
50 ns
50
Input Regulation Range
Input Bias Current
Open Loop Voltage Gain
Power Supply Rejection
Unity Gain BW
VFB
IBIAS
AVOL
PSRR
BW
VFB = 1.4 V
1.260
1.340
V
- 1 1 µA
50 60
60
dB
2 MHz
Output Current (Source)
Output Current (Sink)
PSM Modulator
IEA
VFB = 1.05 V
VFB = 1.55 V
- 2 - 0.5
mA
12
Inductor Peak Current
Output Capability
IPEAK
VDD = 7.2 V, VOUT = 3.3 V
500 mA
PWM Mode Outputc
PSM Mode Outputc
IOUT
VDD = VIN = 7.2 V, VOUT = 3.3 V
600
150
mA
rDS(ON) High Side
rDS(ON) Low Side
Over Temperature Protection
rDS(ON-P)
rDS(ON-N)
VDD = VIN = 7.2 V
300
mΩ
300
Trip Point
165 °C
Hysteresis
25
Supply
Normal Mode
PSM Mode
Shutdown Mode
VDD = VIN = 7.2 V
FOSC = 1.6 MHz
950 1350
200 350 µA
1
Power Good Comparator
POKIN Trip Level
POKIN Input Current
Rising VPOKIN
1.270
- 20
1.300
1.330
20
V
nA
POKIN Hysteresis
30 50
mV
POK Low Voltage
POK High Leakage Current
ISINK(POK) = 1 mA
0.001
0.4
1
V
µA
Notes:
a. The algebraic convention whereby the most negative value is a minimum and the most positive a maximum, is used in this data sheet.
b. Typical values are for DESIGN AID ONLY, not guaranteed or subject to production testing.
c. Guaranteed by design and characterization, not subject to production testing.
Document Number: 70898
S-63920-Rev. C, 23-Aug-99
www.vishay.com
3







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