TS3300 0.6-3Vin, 1.8-3.6Vout, 3.5µA, High-Efficiency Boost + Output Load Switch

TS3300
0.6-3VIN, 1.8-3.6VOUT, 3.5µA, High-Efficiency Boost + Output Load Switch
FEATURES
DESCRIPTION

The TS3300 is a 1st-generation power management
product that combines a high-efficiency boost
regulator and an output load switch in one package.
The boost regulator operates from a supply voltage
as low as 0.6V and can deliver at least 75mA at
1.2VBI to 3VBO, an industry first.




Combines Low-power Boost + Output Load
Switch
Boost Regulator
 Input Voltage: 0.6V- 3V
 Output Voltage: 1.8V- 3.6V
 Efficiency: Up to 84%
 No-load Input Current: 3.5µA
 Delivers >100mA at 1.8VBO from 1.2VBI
 Boost Shutdown Control
 No External Schottky Diode Required
Anti-Crush Capability
 Prevents Input Voltage Collapse when
powered with Weak/High Impedance Power
Sources
Single-Inductor, Discontinuous Conduction
Mode Scheme with Automatic Peak Current
Adjustment
16-Pin, Low-Profile, Thermally-Enhanced
3mm x 3mm TQFN Package
APPLICATIONS
Coin Cell-Powered Portable Equipment
Single Cell Li-ion or Alkaline Powered Equipment
Solar or Mechanical Energy Harvesting
Wireless Microphones
Wireless Remote Sensors
RFID Tags
Blood Glucose Meters
Personal Health-Monitoring Devices
The TS3300 includes an anti-crushTM feature to
prevent the collapse of the input voltage to the boost
regulator when the input is a weak (high impedance)
source. If the input voltage drops below a determined
voltage threshold (settable by a resistor divider), the
boost regulator switching cycles are paused,
effectively limiting the minimum input voltage. AnticrushTM is useful in applications where a buffer
capacitor at the boost’s output can service burst
loads, and the input source exhibits substantial
source impedance (such as an old battery, or at cold
temperatures).
The TS3300 is fully specified over the -40°C to +85°C
temperature range and is available in a low-profile,
thermally-enhanced 16-pin 3x3mm TQFN package
with an exposed back-side paddle. For best
performance, solder the exposed back-side paddle to
PCB ground.
TYPICAL APPLICATION CIRCUIT
Efficiency vs Output Load Current
100
90 1.2VBI to 1.8VBO
EFFICIENCY - %
80
70
60
50
1.2VBI to 3VBO
40
30
20
10
L: LPS4018-103ML
0
1
0.01
0.1
IBO - mA
10
100
Page 1
© 2014 Silicon Laboratories, Inc. All rights reserved.
TS3300
ABSOLUTE MAXIMUM RATINGS
BI to GND ................................................................. -0.3V to VBO +0.1V
CCP................................................................................ -0.3V to +2.5V
BEN to GND ............................................................... -0.3V to VBI+0.3V
BI FB, BO FB to GND ...............................................-0.3V to VBO+0.3V
SW EN, REG EN, REG FB, REG OUT to GND .... -0.3V to VREGIN+0.3V
BO, REG IN to GND..................................................... -0.3V to +5.75V
LSW to GND ................................................................ -0.3V to +5.75V
Continuous Power Dissipation (TA = +70°C)
16-Pin TQFN (Derate at 17.5mW/°C above +70°C) ..... 1398mW
Operating Temperature Range ................................. -40°C to +85°C
Storage Temperature Range .................................. -65°C to +150°C
Lead Temperature (Soldering, 10s)...................................... +300°C
Electrical and thermal 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 condition beyond those indicated in the operational sections
of the specifications is not implied. Exposure to any absolute maximum rating conditions for extended periods may affect device reliability and
lifetime.
PACKAGE/ORDERING INFORMATION
ORDER NUMBER
PART
CARRIER QUANTITY
MARKING
TS3300ITQ1633
Tape
& Reel
-----
Tape
& Reel
3000
3300I
TS3300ITQ1633T
Lead-free Program: Silicon Labs supplies only lead-free packaging.
Consult Silicon Labs for products specified with wider operating temperature ranges.
Page 2
TS3300 Rev. 1.0
TS3300
ELECTRICAL CHARACTERISTICS
VBI = 1.2V, VBO = 3V, VBEN = GND, IBO= 20mA, L = 10µH, CBI=CBO = 22µF unless otherwise noted. Values are at TA = -40°C to +85°C unless
otherwise specified. Typical values are at TA=+25°C unless otherwise specified. Please see Note 1.
PARAMETER
Minimum Input Boost
Voltage
Maximum Input Boost
Voltage
Output Boost Voltage
Range
SYMBOL
CONDITIONS
VBI_MIN
IBO = 0mA. TA=25ºC
VBI_MAX
Guaranteed by design
Output Load-Switch
Supply Current
Boost Shutdown Supply
Current
Boost Feedback Voltage
during operation
Anti-Crush Feedback
Voltage
Anti-Crush Feedback
Voltage Hysteresis
Inductor Peak Current
Inductor Valley Current
NMOS
On
Resistance
PMOS
LOAD
SWITCH
Boost Enable Threshold
IQ
IREGIN
ISHUTDOWN
TYP
MAX
UNITS
0.6
0.75
V
3
V
1.8
VBO
@ BO
@ BI
@ BO
@ BI
3.5
0.07
@ BI
10.8
IREGOUT = 0mA, VREG EN = VREGIN
0.4
See Note 2.
No-Load Input Current
MIN
-40°C<TA<+85°C
See Note 2.
Active-Mode
See Note 3.
VBEN = VBI
TA =25°C
@ BI
3.6
V
6
0.9
µA
1
µA
100
nA
VBO FB
Output voltage accuracy: ±4%
0.489
0.505
0.521
V
VBI FB
VBI ≥ 0.6V
0.363
0.392
0.425
V
VBI FB_HYST
IPK
IV
RON
NMOS
RON
PMOS
RON
LOAD SWITCH
VBEN
IBO=0mA
50
mV
10
mA
mA
365
0.27
Ω
0.48
Measured from REGIN to
REGOUT. See Note 4.
VIL
VIH
0.9
1.2
0.2
VBI - 0.05
V
V
mV
VBEN_HYST
200
Boost Enable Hysteresis
0.2 x VREGIN
VIL (CMOS logic)
Output Load Switch
V
VREG EN
Enable Threshold
VIH (CMOS logic)
0.8 x VREGIN
Output Load Switch
100
mV
VREG EN_HYST
Enable Hysteresis
BO FB Input Leakage
±0.1
±1
IBO FB
Current
REGEN Input Leakage
10
IREG EN
nA
Current
REGFB Input Leakage
±0.1
±1
IREG FB
Current
Note 1: All devices are 100% production tested at TA=+25°C and are guaranteed by characterization for TA=-40°C to +85°C, as specified.
Note 2: IBO=0mA, VBO FB=0.6V.
Note 3: Boost Only Circuit configuration. IBO=0mA. VBI FB=VBI. VBI=1.2V. VBO=3V.
Note 4: VSW EN=VREGIN=VBO. VREG EN=GND.
TS3300 Rev. 1.0
Page 3
TS3300
TYPICAL PERFORMANCE CHARACTERISTICS
VBI = 1.2V, VBO = 3V, VBEN = GND, IBO = 0A, L = 10µH (LPS4018-103ML), CBI=CBO = 22µF, VSW EN=VREG FB=VREG EN=VREGIN=VBO,
IREGOUT=0A, unless otherwise specified. Values are at TA = 25°C unless otherwise specified.
Boost Regulator
Maximum Output Current vs VBI
( for VBO to drop 2.5%)
Boost Regulator
Efficiency vs Load Current
100
300
1.2VBI to 1.8VBO
90
240
1.2VBI to 3VBO
70
180
60
IBO - mA
EFFICIENCY - %
80
50
40
120
30
20
60
10
L: LPS4018-103ML
0
0
0.01
0.1
1
10
100
1
0.5
2
IBO - mA
1.5
VBI - V
Boost Minimum Start-Up Voltage
vs Source Resistance
Boost Minimum Start-Up Voltage
vs Load Current
1.2
2.5
1.8
L: 22µH (LPS4018-223ML)
1.1
START-UP VOLTAGE - V
START-UP VOLTAGE - V
VBO =3V
VBO =1.8V
+85ºC
1
-40ºC
0.9
0.8
+25ºC
0.7
1.6
1.4
1.2
1
0.6
L: 10µH (LPS4018-103ML)
0.5
0.8
0
5
10
15
20
25
SOURCE RESISTANCE- Ω
0
30
3
6
9
12
IBO - mA
15
18
Inductor Peak Current vs
Load Current
INDUCTOR PEAK CURRENT - A
1.1
1
0.9
1.2VBI to 3VBO
0.8
0.7
0.6
0.5
1.2VBI to 1.8VBO
0.4
0.3
0.2
0
Page 4
25
50
IBO - mA
75
100
TS3300 Rev. 1.0
TS3300
TYPICAL PERFORMANCE CHARACTERISTICS
VBI = 1.2V, VBO = 3V, VBEN = GND, IBO = 0A, L = 10µH (LPS4018-103ML), CBI=CBO = 22µF, VSW EN=VREG FB=VREG EN=VREGIN=VBO,
IREGOUT=0A, unless otherwise specified. Values are at TA = 25°C unless otherwise specified.
Boost Regulator Output Voltage Ripple
VBI = 1.2V, VBO = 1.8V, CBO= 22µF, IBO = 40mA
VBO – 50mV/DIV
VBO – 50mV/DIV
Boost Regulator Output Voltage Ripple
VBI = 1.2V, VBO = 1.8V, CBO= 22µF, IBO = 5mA
50µs/DIV
20µs/DIV
Boost Regulator Output Voltage Ripple
VBI = 1.2V, VBO = 3V, CBO= 22µF, IBO = 5mA
VBO – 50mV/DIV
VBO – 50mV/DIV
Boost Regulator Output Voltage Ripple
VBI = 1.2V, VBO = 1.8V, CBO= 22µF, IBO = 80mA
50µs/DIV
50µs/DIV
VBO – 50mV/DIV
Boost Regulator Output Voltage Ripple
VBI = 1.2V, VBO = 3V, CBO= 22µF, IBO = 80mA
50µs/DIV
TS3300 Rev. 1.0
Page 5
TS3300
TYPICAL PERFORMANCE CHARACTERISTICS
VBI = 1.2V, VBO = 3V, VBEN = GND, IBO = 0A, L = 10µH (LPS4018-103ML), CBI=CBO = 22µF, VSW EN=VREG FB=VREG EN=VREGIN=VBO,
IREGOUT=0A, unless otherwise specified. Values are at TA = 25°C unless otherwise specified.
Boost Regulator Load Step Response
VBI = 1.2V, VBO = 3V, CBO= 10µF, IBO = 5mA
IBO
33mA/DIV
IBO
4.17mA/DIV
VBO
100mV/DIV
VBO
100mV/DIV
Boost Regulator Load Step Response
VBI = 1.2V, VBO = 3V, CBO= 10µF, IBO = 40mA
200µs/DIV
200µs/DIV
IL
VBO
100mA/DIV 50mV/DIV
Boost Regulator Output Voltage Ripple, Inductor Current,
and LSW Voltage
VBI = 1.2V, VBO = 1.8V, CBO= 22µF, IBO = 5mA
L: LPS4018-103ML
VLSW
1V/DIV
L: LPS4018-103ML
VLSW
1V/DIV
IL
VBO
500mA/DIV 50mV/DIV
Boost Regulator Output Voltage Ripple, Inductor Current,
and LSW Voltage
VBI = 1.2V, VBO = 3V, CBO= 22µF, IBO = 40mA
2µs/DIV
2µs/DIV
BO
1V/DIV
IBI
50mA/DIV
Large Output Capacitor Start-up with VANTI-CRUSHTM=0.9V
CBO=500µF, RIN =10Ω, CIN=22µF, VBI=1.2V
100ms/DIV
Page 6
TS3300 Rev. 1.0
TS3300
PIN FUNCTIONS
PIN
1
2
NAME
BI
CCP
3
BEN
4
BI FB
5
6
7
8
9
10
11
12
FAC
SW EN
REG EN
REG FB
GND
REGOUT
REGIN
GND
13
BO FB
14
BO
15
16
LSW
GND
EP
FUNCTION
Boost Input. Connect to input source. CBI Connection.
Place a 3.3nF capacitor between this pin and GND
Boost Enable (active low). To enable the TS3300, connect this to GND. To
disable the TS3300, set the voltage to greater than VBI – 50mV.
Boost Input Feedback for Anti-Crush Voltage Setting. The BI FB pin
voltage is 392mV. To set the anti-crush voltage, refer to the Applications
Information section and to Figure 4.
Factory use only. Do not connect to GND or VDD. Leave open.
Connect to REGIN.
Output Load-Switch Logic Input Control (active low).
Connect to REGIN.
Ground. Connect this pin to the analog ground plane.
Boost Regulator Load-Switch output.
Boost Regulator Load-Switch input. Connect to BO for use.
Ground. Connect this pin to the analog ground plane.
Boost Output Feedback. The BO FB pin voltage is 505mV. BO FB coupled
with a voltage divider circuit sets the boost regulator output voltage. Refer
to Figure 3.
Regulated output voltage set by resistor network. To set regulated output
voltage, refer to Figure 3. CBO connection.
Inductor Connection.
Ground. Connect this pin to the analog ground plane.
For best electrical and thermal performance, connect exposed paddle to
GND.
BLOCK DIAGRAM
TS3300 Rev. 1.0
Page 7
TS3300
THEORY OF OPERATION
The TS3300 is a power management product that
combines a high-efficiency boost regulator and an
output load switch into one package. The boost
regulator can operate from supply voltages as low as
0.6V and can deliver at least 75mA at 1.2VBI and
3VBO. Under no-load conditions, the boost regulator
exhibits a No-Load Input Supply Current of 10.8µA
that is actually drawn from the input source while the
output is within regulation.
At start-up, an internal low voltage oscillator in the
start-up control circuitry drives the gate of the internal
FET to charge the load capacitor. Once the output
voltage reaches approximately 1.1V, the main control
circuitry starts to operate.
With an adjustable peak inductor current, the TS3300
can provide up to 84% efficiency with a 1.2VBI and
3VBO. The input and output supply voltage range for
the boost regulator is from 0.6V to 3V and 1.8V to
3.6V, respectively.
The TS3300 can be operated in two different
configurations, Boost Only Configuration or
Boost + Output Load Switch Configuration. If the
Output Load Switch is not needed, it is recommended
to use the Boost Only Configuration, since the lowest
quiescent current is achievable this way.
Boost + Output Load Switch Operation
For Boost + Output Load Switch operation, please
refer to Figure 1 which displays the appropriate circuit
configuration. The Boost’s Output, BO, must be
connected to the Output Load Switch Input, REGIN.
The Output Load Switch is controlled by REGEN,
which is an Active Low Logic Input. The SWEN and
REGFB pins must be connected to REGIN. During
Boost + Output Load Switch operation, the Boost
Shutdown Control should not be used. The BEN pin
should be connected to analog ground. During this
mode of operation, the Output Load Switch will
require an added 1µA of Input Supply Current as
drawn from the input source. The anti-crushTM feature
can be used during Boost + Output Load Switch
operation. The output load switch should not be used
as a load disconnect. Refer to Table 1 for the Output
Load Switch settings.
OUTPUT LOAD SWITCH FUNCTION
SW EN
REGIN
REG EN
FUNCTION
VREGOUT=GND
High
(OFF State)
REG FB, SW EN, REGIN should
be connected to BO.
VREGOUT=VBO
Low
(ON State)
REG FB
Table 1. Output Load Switch settings
Figure 1. Boost + Output Load Switch Circuit Configuration
Page 8
TS3300 Rev. 1.0
TS3300
Boost Only Operation
For Boost Only operation, please refer to Figure 2
which displays the appropriate circuit configuration.
The Anti-Crush feature can be used during Boost
Only operation. During Boost Only operation, a
shutdown (BEN) pin is available to shutdown the
boost regulator. The boost regulator is in shutdown
mode when BEN is HIGH. During shutdown, the
supply current reduces to 0.1µA. For Boost Only
operation, the following pins should be connected to
analog ground, REGIN, REGOUT, REGFB, REGEN,
and SWEN.
How to Set the Boost Output Voltage
The output voltage can be set via a voltage divider
circuit as shown in Figure 3. The output feedback
(BO FB) pin is 505mV. It is recommended to use
large resistor values to minimize additional current
draw at the output. Resistors values less than 8MΩ
are recommended.
To set a 3V output voltage with R2 = 1.37MΩ, R1 is
calculated to be 6.77MΩ. A 1% standard resistor
value of 6.81MΩ can be selected. This results in an
output voltage of 3.02V.
APPLICATIONS INFORMATION
Inductor Selection
A low ESR, shielded 10μH inductor is recommended
for most applications and provides the best
compromise between efficiency and size. A low loss
ferrite and low dc resistance (DCR) inductor is best
for optimal efficiency. Furthermore, there should exist
at least an 8% margin between the saturation current
of the inductor and the peak inductor current for a
given set of operating conditions. Table 2 provides a
list of inductor manufactures. Refer to the Inductor
Peak Current vs Load Current plot in the “Typical
Performance Characteristics” section. This plot
shows how the inductor peak current varies with load
current with a LPS4018-103ML inductor from
Coilcraft.
Inductors
Supplier
Website
Coilcraft
www.coilcraft.com
Murata
www.murata.com
Sumida
www.sumida.com
Table 2. Inductor Manufactures
Figure 3. Setting the Boost Output Voltage
with a Voltage Divider
Using the following equation to solve for R1 for a
given R2 value, the output voltage can be set:
R1=
VBO - 0.505 R2
0.505
Input and Output Capacitor Selection
For the boost regulator, a low ESR ceramic input and
output capacitor of at least 10μF is recommended to
be placed as close as possible to the BI and BO pin.
Output voltage ripple can be reduced by increasing
the value of the output capacitor while providing
improved transient response. Ceramic capacitors
with X5R or X7R dielectric with a minimum voltage
rating of 10V are recommended.
Figure 2. Boost Only Circuit Configuration
TS3300 Rev. 1.0
Page 9
TS3300
Boost Input Anti-CrushTM Feature
To set the anti-crushTM voltage, a feedback pin
(BI FB) in conjunction with a voltage divider circuit
can be implemented as shown in Figure 4. The
feedback pin voltage is 392mV. It is recommended to
use large resistor values to minimize additional
current draw at the input.
Figure 4. Setting the Anti-CrushTM Voltage with
a Voltage Divider
Using the following equation to solve for R5 for a
given R6 value, the output voltage can be set:
BO
200mV/DIV
BI
500mV/DIV
Figure 6 shows a scope capture of the anti-crushTM
feature in action at start-up under a heavy capacitive
load of 500µF and an input source impedance of
10Ω. A high source impedance is typical of a weak
battery source. The measurement was performed
with the anti-crushTM voltage set to 0.9V. The purple
and blue traces represent the input current and boost
output voltage respectively. At start-up, the current
rises up to 50mA and drops to approximately 30mA
for approximately 40ms in order to charge the output
capacitor. At this point, the voltage to the input of the
TS3300 is 0.9V until the boost output achieves
regulation.
VANTI-CRUSHTM - 0.392 R4
Large Output Capacitor Start-up with VAnti-CrushTM=0.9V
RIN=10Ω, VBI=1.2V, VBO= 3V, CBO=500µF
Figure 5 shows a scope capture of the load step
response. The measurement was performed with the
anti-crushTM voltage set to 0.9V. The output of the
Boost Regulator is pulsed with a 100mA load every
100ms for 1ms as shown by the pink curve, the input
voltage after a battery impedance of 10Ω drops from
1.2V to 0.9V as shown by the blue curve and the
boost output voltage drops by only 160mV as shown
by the yellow curve. The TS3300 quickly replenishes
the 500µF capacitor and the output of the boost
regulator returns to 3V.
IBI
50mA/DIV
0.392
To set a 0.9V VANTI-CRUSHTM voltage with R4=1.37MΩ,
R3 is calculated to be 1.78MΩ. The anti-crushTM
voltage is to be set above the minimum input voltage
specification of the TS3300.
Page 10
Figure 5. Using Anti-CrushTM Feature to Maintain Output
Regulation with Load Step Response
BO
1V/DIV
R3=
Boost Load Step Response with VAnti-CrushTM=0.9V
RIN=10Ω, VBI=1.2V, VBO= 3V, CBO=500µF, IBO=100mA
IBO
83mA/DIV
The TS3300 includes an anti-crushTM feature to
prevent the collapse of the input voltage to the boost
regulator when the input is a weak (high impedance)
source. If the input voltage drops below a determined
voltage threshold (settable by a resistor divider), the
boost regulator switching cycles are paused,
effectively limiting the minimum input voltage.
Anti-crushTM is useful in applications where a buffer
capacitor at the boost’s output can service burst
loads, and the input source exhibits substantial
source impedance (such as with an old battery, or at
cold temperatures).
Figure 6. Using Anti-CrushTM Feature at Start-up with Large
Output Capacitor and a 10Ω Input Impedance.
TS3300 Rev. 1.0
TS3300
PACKAGE OUTLINE DRAWING
Patent Notice
Silicon Labs invests in research and development to help our customers differentiate in the market with innovative low-power, small size,
analog-intensive mixed-signal solutions. Silicon Labs' extensive patent portfolio is a testament to our unique approach and world-class
engineering team.
The information in this document is believed to be accurate in all respects at the time of publication but is subject to change without notice.
Silicon Laboratories assumes no responsibility for errors and omissions, and disclaims responsibility for any consequences resulting from the
use of information included herein. Additionally, Silicon Laboratories assumes no responsibility for the functioning of undescribed features or
parameters. Silicon Laboratories reserves the right to make changes without further notice. Silicon Laboratories makes no warranty,
representation or guarantee regarding the suitability of its products for any particular purpose, nor does Silicon Laboratories assume any
liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation
consequential or incidental damages. Silicon Laboratories products are not designed, intended, or authorized for use in applications intended
to support or sustain life, or for any other application in which the failure of the Silicon Laboratories product could create a situation where
personal injury or death may occur. Should Buyer purchase or use Silicon Laboratories products for any such unintended or unauthorized
application, Buyer shall indemnify and hold Silicon Laboratories harmless against all claims and damages.
Silicon Laboratories and Silicon Labs are trademarks of Silicon Laboratories Inc.
Other products or brandnames mentioned herein are trademarks or registered trademarks of their respective holders.
Silicon Laboratories, Inc.
400 West Cesar Chavez, Austin, TX 78701
+1 (512) 416-8500 ▪ www.silabs.com
Page 11
TS3300 Rev. 1.0
Smart.
Connected.
Energy-Friendly
Products
Quality
Support and Community
www.silabs.com/products
www.silabs.com/quality
community.silabs.com
Disclaimer
Silicon Laboratories intends to provide customers with the latest, accurate, and in-depth documentation of all peripherals and modules available for system and software implementers
using or intending to use the Silicon Laboratories products. Characterization data, available modules and peripherals, memory sizes and memory addresses refer to each specific
device, and "Typical" parameters provided can and do vary in different applications. Application examples described herein are for illustrative purposes only. Silicon Laboratories
reserves the right to make changes without further notice and limitation to product information, specifications, and descriptions herein, and does not give warranties as to the accuracy
or completeness of the included information. Silicon Laboratories shall have no liability for the consequences of use of the information supplied herein. This document does not imply
or express copyright licenses granted hereunder to design or fabricate any integrated circuits. The products must not be used within any Life Support System without the specific
written consent of Silicon Laboratories. A "Life Support System" is any product or system intended to support or sustain life and/or health, which, if it fails, can be reasonably expected
to result in significant personal injury or death. Silicon Laboratories products are generally not intended for military applications. Silicon Laboratories products shall under no
circumstances be used in weapons of mass destruction including (but not limited to) nuclear, biological or chemical weapons, or missiles capable of delivering such weapons.
Trademark Information
Silicon Laboratories Inc., Silicon Laboratories, Silicon Labs, SiLabs and the Silicon Labs logo, CMEMS®, EFM, EFM32, EFR, Energy Micro, Energy Micro logo and combinations
thereof, "the world’s most energy friendly microcontrollers", Ember®, EZLink®, EZMac®, EZRadio®, EZRadioPRO®, DSPLL®, ISOmodem ®, Precision32®, ProSLIC®, SiPHY®,
USBXpress® and others are trademarks or registered trademarks of Silicon Laboratories Inc. ARM, CORTEX, Cortex-M3 and THUMB are trademarks or registered trademarks of
ARM Holdings. Keil is a registered trademark of ARM Limited. All other products or brand names mentioned herein are trademarks of their respective holders.
Silicon Laboratories Inc.
400 West Cesar Chavez
Austin, TX 78701
USA
http://www.silabs.com