AAT3175_202101B.pdf

DATA SHEET
AAT3175
High Efficiency 1X/1.5X/2X Charge Pump for White LED Flash Applications
General Description
Features
The AAT3175 is a low noise, constant frequency charge
pump DC/DC converter that uses a tri-mode load switch
(1X), fractional (1.5X), and doubling (2X) conversion to
maximize efficiency for white LED flash applications. The
AAT3175 is capable of driving up to three flash LEDs at
300mA total current from a 2.7V to 5.5V input. A low
external parts count (two 1μF flying capacitors and two
small 1μF capacitors at VIN and VOUT) make this part ideally suited for small battery-powered applications.
• VIN Range: 2.7V to 5.5V
• Up to 300mA Total Flash Current
• Fully Programmable Current with Single Wire
▪ 16 Logarithmic Current Levels
• Tri-Mode 1X, 1.5X, and 2X Charge Pump for Maximum
Efficiency and VF Coverage
• Drives 3-in-1 or 2-in-1 Flash LEDs
▪ 0.5% Current Matching
• No Inductors, Low Noise Operation
• 1MHz Constant Switching Frequency
• Small Application Circuit
• Built-In Thermal Protection
• Automatic Soft-Start
• IQ <1μA in Shutdown
• TDFN33-12 Package
Skyworks’ S2Cwire™ (Simple Serial Control™) serial
digital input is used to enable, disable, and set current
for all LEDs with 16 level settings down to 0.
The AAT3175 is equipped with built-in protection for VOUT
short-circuit condition and auto-disable for load shortcircuit condition on any one of the channels. Built-in softstart circuitry prevents excessive inrush current during
start-up. A low-current shutdown feature disconnects
the load from VIN and reduces quiescent current to less
than 1μA.
Applications
• Programmable Current Sinks
• White LED Backlighting
• White Photo Flash for Mobile Phones
The AAT3175 is available in a Pb-free, space-saving,
thermally-enhanced 12-pin 3×3mm TDFN package.
Typical Application
C1+
C2+
C1
1μF
2.7V to 5.5V
C1-
C2-
VIN
VOUT
CIN
1μF
D1
AAT3175
GND
D2
D3
COUT
1μF
D1
D2
EN/SET
EN/SET
D3
D4
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
202101B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • March 5, 2013
1
DATA SHEET
AAT3175
High Efficiency 1X/1.5X/2X Charge Pump for White LED Flash Applications
Pin Descriptions
Pin #
Symbol
1
2
3
4
D4
EN/SET
C1+
C1-
5
VOUT
6
7
8
9
10
11
12
EP
C2+
C2VIN
GND
D1
D2
D3
Function
Current sink input #4; 100mA max.
S2Cwire serial interface control pin.
Flying capacitor 1 positive terminal. Connect a 1μF capacitor between C1+ and C1-.
Flying capacitor 1 negative terminal.
Charge pump output to drive load circuit. Requires 1μF capacitor connected between this pin and
ground.
Flying capacitor 2 positive terminal. Connect a 1μF capacitor between C2+ and C2-.
Flying capacitor 2 negative terminal.
Input power supply. Requires 1μF capacitor connected between this pin and ground.
Ground.
Current sink input #1; 100mA max.
Current sink input #2; 50mA max.
Current sink input #3; 50mA max.
Exposed paddle (bottom). Connect to GND directly beneath package.
Pin Configuration
TDFN33-12
(Top View)
D4
EN/SET
C1+
C1VOUT
C2+
2
1
12
2
11
3
10
4
9
5
8
6
7
D3
D2
D1
GND
VIN
C2-
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected]rksinc.com • www.skyworksinc.com
202101B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • March 5, 2013
DATA SHEET
AAT3175
High Efficiency 1X/1.5X/2X Charge Pump for White LED Flash Applications
Absolute Maximum Ratings1
Symbol
VIN
VEN/SET
IOUT2
TJ
TLEAD
Description
Input Voltage
EN/SET to GND Voltage
Maximum DC Output Current
Operating Junction Temperature Range
Maximum Soldering Temperature (at leads, 10 sec.)
Value
Units
-0.3 to 6
-0.3 to VIN + 0.3
300
-40 to 150
300
V
V
mA
°C
°C
Value
Units
2.0
50
W
°C/W
Thermal Information3
Symbol
PD
JA
Description
Maximum Power Dissipation4
Maximum Thermal Resistance
1. Stresses above those listed in Absolute Maximum Ratings may cause permanent damage to the device. Functional operation at conditions other than the operating conditions
specified is not implied. Only one Absolute Maximum Rating should be applied at any one time.
2. Based on long-term current density limitation.
3. Mounted on an FR4 board.
4. Derate 20mW/°C above 25°C.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
202101B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • March 5, 2013
3
DATA SHEET
AAT3175
High Efficiency 1X/1.5X/2X Charge Pump for White LED Flash Applications
Electrical Characteristics1
CIN = COUT = C1 = C2 = 1.0μF; TA = -40°C to +85°C, unless otherwise noted. Typical values are TA = 25°C, VIN = 3.5V.
Symbol
Description
Conditions
Input Power Supply
Operation Range
VIN
ICC
Operating Current
ISHDN
Shutdown Current
IDX
I(D-Match)
ISINK Average Current Accuracy
Current Matching2
1X to 1.5X or 1.5X to 2X TransiVTH
tion Threshold at Any ISINK Pin
Charge Pump Section
TSS
Soft-Start Time
FCLK
Clock Frequency
EN/SET
VEN(L)
Enable Threshold Low
VEN(H)
Enable Threshold High
TEN/SET LO
EN/SET Low Time
TEN/SET HI MIN Minimum EN/SET High Time
TEN/SET HI MAX Maximum EN/SET High Time
TOFF
EN/SET Off Timeout
TLAT
EN/SET Latch Timeout
IEN/SET
EN/SET Input Leakage
Min
Typ
2.7
1X Mode, 3.0 ≤ VIN ≤ 5.5, Active, No Load Current
1.5X Mode, 3.0 ≤ VIN ≤ 5.5, Active, No Load Current
2X Mode, 3.0 ≤ VIN ≤ 5.5, Active, No Load Current
EN/SET = 0
D1, D4 Max Setting
D2, D3 Max Setting
VF:D1:D4 = 3.6V, D2 and D3 in Parallel
VIN = 2.7V
VIN = 5.5V
0.3
1.0
2.0
90
45
100
50
0.5
Max
Units
5.5
1.0
3.0
3.7
1.0
110
55
5.0
V
mA
μA
mA
%
250
mV
100
1000
μs
kHz
0.4
1.4
0.3
75
50
-1
75
500
500
1
V
V
μs
ns
μs
μs
μs
μA
1. The AAT3175 is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is assured by design, characterization, and correlation with statistical process controls.
2. Current matching is defined as the deviation of any sink current from the average of all active channels.
4
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
202101B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • March 5, 2013
DATA SHEET
AAT3175
High Efficiency 1X/1.5X/2X Charge Pump for White LED Flash Applications
Typical Characteristics
CIN = COUT = C1 = C2 = 1μF, TA = 25°C, VIN = 3.5V, unless otherwise noted.
Efficiency vs. Supply Voltage
300mA LED Pulse
(VIN = 3.8V)
100
Efficiency (%)
90
80
60mA
VF = 3.0V
VOUT
(2V/div)
70
150mA
VF = 3.2V
60
50
IOUT
(200mA/div)
40
30
2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 4.0 4.1 4.2
Time (100ms/div)
Supply Voltage (V)
Turn-On to 1X Mode
Turn-On to 1.5X Mode
(VIN = 4.2V; 300mA Load)
(VIN = 4.0V; 300mA Load)
EN
(2V/div)
EN
(2V/div)
VOUT
(2V/div)
VOUT
(2V/div)
VSINK
(1V/div)
VSINK
(1V/div)
IIN
(400mA/div)
IIN
(400mA/div)
Time (200μ
μs/div)
Time (200μ
μs/div)
Turn-On to 2X Mode
Turn-Off from 1.5X Mode
(VIN = 3.8V; 300mA Load)
(VIN = 4.0V; 300mA Load)
EN
(2V/div)
EN
(2V/div)
VF
(1V/div)
VOUT
(2V/div)
VSINK
(1V/div)
IIN
(200mA/div)
IIN
(400mA/div)
Time (200μ
μs/div)
Time (200μ
μs/div)
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
202101B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • March 5, 2013
5
DATA SHEET
AAT3175
High Efficiency 1X/1.5X/2X Charge Pump for White LED Flash Applications
Typical Characteristics
CIN = COUT = C1 = C2 = 1μF, TA = 25°C, VIN = 3.5V, unless otherwise noted.
Line Response
Load Characteristics
(1.5X Mode; 150mA Load)
(VIN = 3.5V; 1.5X Mode; 150mA Load)
4.2V
VIN
(500mV/div)
3.7V
VOUT
(500mV/div)
3.6V
VSINK
(500mV/div)
VIN
(100mV/div)
VOUT
(100mV/div)
VSINK
(100mV/div)
ILED
(10mA/div)
Time (1ms/div)
Time (500ns/div)
Load Characteristics
Input Ripple vs. Input Voltage
(VIN = 3.0V; 2X Mode; 150mA Load)
(150mA Load)
30
Input Ripple (mV)
VIN
(100mV/div)
VOUT
(100mV/div)
VSINK
(100mV/div)
25
20
15
10
5
0
Time (500ns/div)
3.3
3.5
3.8
4.0
4.3
4.5
400
300
-40°C
200
150
25°C
85°C
50
0
EN/SET Off Timeout (µs)
EN/SET Latch Timeout (µs)
6
3.0
EN/SET Off Timeout vs. Input Voltage
350
100
2.8
Input Voltage (V)
EN/SET Latch Timeout vs. Input Voltage
250
2.5
350
300
-40°C
250
200
150
25°C
85°C
100
50
0
2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9 5.1 5.3 5.5
2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9 5.1 5.3 5.5
Input Voltage (V)
Input Voltage (V)
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
202101B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • March 5, 2013
DATA SHEET
AAT3175
High Efficiency 1X/1.5X/2X Charge Pump for White LED Flash Applications
Typical Characteristics
CIN = COUT = C1 = C2 = 1μF, TA = 25°C, VIN = 3.5V, unless otherwise noted.
1.2
1.1
1
-40°C
0.9
0.8
0.7
0.6
25°C
85°C
0.5
0.4
0.3
0.2
Enable Threshold Low vs. Input Voltage
Enable Threshold Low (V)
Enable Threshold High (V)
Enable Threshold High vs. Input Voltage
1.2
1.1
1
0.9
-40°C
0.8
0.7
0.6
0.5
25°C
85°C
0.4
0.3
0.2
2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9 5.1 5.3 5.5
2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9 5.1 5.3 5.5
Input Voltage (V)
Input Voltage (V)
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
202101B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • March 5, 2013
7
DATA SHEET
AAT3175
High Efficiency 1X/1.5X/2X Charge Pump for White LED Flash Applications
Functional Block Diagram
C1+
C1- C2+
C2-
1X, 1.5X, 2X
Charge Pump
VIN
VOUT
Soft Start
Control
1MHz
Oscillator
D/A
Voltage
Reference
6 x 16 bit
ROM
EN/SET
S2Cwire
Interface
D/A
D1
D/A
D2
D/A
D3
D/A
D4
D/A
GND
Functional Description
The AAT3175 is a tri-mode load switch (1X) and high
efficiency (1.5X or 2X) charge pump device intended for
white LED flash applications. To maximize power conversion efficiency, an internal sensing circuit monitors
the voltage required on each constant current sink input
and sets the load switch and charge pump modes based
on the input battery voltage and the current sink input
voltage.
As the battery discharges over time, the
AAT3175 charge pump is enabled when any of the four
current sink inputs nears dropout. The charge pump
initially starts in 1.5X mode. If the charge pump output
droops enough for any current source output to become
close to dropout, the charge pump will automatically
transition to 2X mode.
The AAT3175 requires only four external components:
two 1μF ceramic capacitors for the charge pump flying
capacitors (C1 and C2), one 1μF ceramic input capacitor
(CIN), and one 0.33μF to 1μF ceramic charge pump output capacitor (COUT).
The four constant current sink inputs (D1 to D4) can
drive four individual LEDs with a maximum current of
50mA each for D2 and D3. D1 and D4 are driven by two
8
parallel current sources, resulting in a maximum of
100mA each. Unused sink inputs are connected to VOUT;
otherwise, the part will operate only in 2X charge pump
mode. The S2Cwire serial interface enables the AAT3175
and sets the current sink magnitudes. The D1~D4 current configuration is optimized to drive either 2-in-1
LEDs by combining D1/D2, D3/D4, or 3-in-1 LEDs by
combining D2/D3.
Constant Current Output Level Settings
The constant current sink levels for D1 to D4 are set via
the serial interface according to a logarithmic scale where
each code is 1dB lower than the previous code. In this
manner, LED brightness appears linear with each increasing code count. Because the inputs D1 to D4 are true
independent constant current sinks, the voltage observed
on any single given input will be determined by the
actual forward voltage (VF) for the LED being driven.
Since the input current sinks of the AAT3175 are programmable, no PWM (pulse width modulation) or additional control circuitry is needed to control LED brightness. This feature greatly reduces the burden on a
microcontroller or system IC to manage LED or display
brightness, allowing the user to “set it and forget it.”
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
202101B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • March 5, 2013
DATA SHEET
AAT3175
High Efficiency 1X/1.5X/2X Charge Pump for White LED Flash Applications
With its high-speed serial interface (1MHz data rate),
the input sink current of the AAT3175 can be changed
successively to brighten or dim LEDs in smooth transitions (e.g., to fade-out) or in abrupt steps, giving the
user complete programmability and real-time control of
LED brightness.
The S2Cwire serial interface has flexible timing. Data can
be clocked-in at speeds greater than 1MHz, or much
slower, such as 15kHz. After data is submitted, EN/SET
is held high to latch the data. Once EN/SET has been
held in the logic high state for time TLAT, the programmed
current becomes active and the internal data register is
reset to zero. For subsequent current level programming, the number of rising edges corresponding to the
desired code must be entered on the EN/SET pin.
S2Cwire Serial Interface
The current level magnitude is controlled by Skyworks'
S2Cwire serial interface. The interface records rising
edges of the EN/SET pin and decodes them into 16 different states. The 16 current level settings available are
indicated in Table 1.
Data
D2, D3
IOUT (mA)
D1, D4
IOUT (mA)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
50
44
40
36
32
28
25
22
20
17
16
14
13
11
10
0
100
88
80
72
64
56
50
44
40
34
32
28
26
22
20
0
When EN/SET is held low for an amount of time greater
than TOFF, the AAT3175 enters into shutdown mode and
draws less than 1μA from VIN. The internal data register
is reset to zero during shutdown.
Auto-Disable Feature
The AAT3175 is equipped with an auto-disable feature
for each LED channel. After the IC is enabled and started up, a test current of 150μA (typical) is forced through
each sink channel. The channel will be disabled if the
voltage of that particular DX pin does not fall below a
certain threshold. This feature is very convenient for
disabling an unused channel or during an LED fail-short
event.
Thermal Protection
The AAT3175 has a built-in thermal protection circuit
that will shut down the charge pump if the die temperature rises above the thermal limit, as is generally the
case during a short-circuit of the VOUT pin.
Table 1: Current Level Settings.
S2Cwire Serial Interface Timing
THI
TLO
TOFF
T LAT
EN/SET
1
Data Reg
2
n-1
0
n ≤ 16
n
0
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
202101B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • March 5, 2013
9
DATA SHEET
AAT3175
High Efficiency 1X/1.5X/2X Charge Pump for White LED Flash Applications
Applications Information
LED Selection
Although the AAT3175 is specifically intended for driving
white LEDs, the device can also be used to drive most
types of LEDs with forward voltage specifications ranging
from 2.0V to 4.1V. LED applications may include display
backlighting, camera photo-flash applications, color
(RGB) LEDs, infrared (IR) diodes for remotes, and other
loads benefiting from a controlled output current generated from a varying input voltage. Since the D1 to D4
input current sinks are matched with negligible voltage
dependence, the LED brightness will be matched regardless of the specific LED forward voltage (VF) levels. In
some instances (e.g., in high luminous output applications such as photo flash), it may be necessary to drive
high-VF type LEDs. The low dropout current sinks in the
AAT3175 make it capable of driving LEDs with forward
voltages as high as 4.1V at full current from an input
supply as low as 3.5V. Outputs can be paralleled to drive
high-current LEDs without complication.
Device Switching Noise Performance
The AAT3175 operates at a fixed frequency of approximately 1MHz to control noise and limit harmonics that
can interfere with the RF operation of cellular telephone
handsets or other communication devices. Back-injected
noise appearing on the input pin of the charge pump is
20mV peak-to-peak, typically ten times less than inductor-based DC/DC boost converter white LED backlight
solutions. The AAT3175 soft-start feature prevents noise
transient effects associated with inrush currents during
start-up of the charge pump circuit.
Capacitor Selection
Careful selection of the four external capacitors CIN, C1,
C2, and COUT is important because they will affect turn-on
time, output ripple, and transient performance. Optimum
performance will be obtained when low equivalent series
resistance (ESR) ceramic capacitors are used; generally,
low ESR may be defined as less than 100m. A value of
1μF for all four capacitors is a good starting point when
choosing capacitors. If the LED current sources are only
programmed for light current levels, then the capacitor
size may be decreased.
ed over all other types of capacitors for use with the
AAT3175. Ceramic capacitors offer many advantages
over their tantalum and aluminum electrolytic counterparts. A ceramic capacitor typically has very low ESR, is
lowest cost, has a smaller PCB footprint, and is nonpolarized. Low-ESR ceramic capacitors help maximize
charge pump transient response. Since ceramic capacitors are non-polarized, they are not prone to incorrect
connection damage.
Equivalent Series Resistance
ESR is an important characteristic to consider when
selecting a capacitor. ESR is a resistance internal to a
capacitor that is caused by the leads, internal connections, size or area, material composition, and ambient
temperature. Capacitor ESR is typically measured in
milliohms for ceramic capacitors and can range to more
than several ohms for tantalum or aluminum electrolytic
capacitors.
Ceramic Capacitor Materials
Ceramic capacitors less than 0.1μF are typically made
from NPO or C0G materials. NPO and C0G materials
generally have tight tolerance and are very stable over
temperature. Larger capacitor values are usually composed of X7R, X5R, Z5U, or Y5V dielectric materials.
Large ceramic capacitors (i.e., greater than 2.2μF) are
often available in low-cost Y5V and Z5U dielectrics, but
capacitors greater than 1μF are not typically required for
AAT3175 applications.
Capacitor area is another contributor to ESR. Capacitors
that are physically large will have a lower ESR when
compared to an smaller capacitor made of equivalent
material. These larger devices can improve circuit transient response when compared to an equal value capacitor in a smaller package size.
Evaluation Board Description
The AAT3175 evaluation board demonstrates the functionality of the AAT3175 and its application as a white
LED flash driver.
A schematic of the complete circuit is shown in Figure 1;
Figures 2 and 3 depict the actual board layout. Table 2
gives the component listing
Capacitor Characteristics
Ceramic composition capacitors are highly recommend-
10
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
202101B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • March 5, 2013
DATA SHEET
AAT3175
High Efficiency 1X/1.5X/2X Charge Pump for White LED Flash Applications
DC+
DC-
J1
DC+
U1
AAT3175
C1
1µF
1
2
3
4
5
6
C3
1µF
D3
D2
D1
GND
VIN
C2-
D4
EN/SET
C1+
C1VOUT
C2+
12
11
10
9
8
7
C4
1µF
C2
1µF
JPx
GND
D1
GND
R7
220
J2
R6
100K
DC+
GND
R3 R2 R1
1K 1K 1K
DATA
0
2
4
SW3
1
3
5
FLASH
0
2
4
MOVIE
0
2
4
SW2
1
3
5
C5
10µF
U2
1
2
3
4
VDD
GP5
GP4
GP3
PIC12F675
VSS
GP0
GP1
GP2
8
7
6
5
VR4
POT 10K
R4
330
SW1
1
3
5
GND
R5
330
LED7
RED
GND
LED0
GRN
GND
GND
Figure 1: AAT3175 Evaluation Board Schematic.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
202101B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • March 5, 2013
11
DATA SHEET
AAT3175
High Efficiency 1X/1.5X/2X Charge Pump for White LED Flash Applications
Figure 2: AAT3175 Evaluation Board
Top Layer (not to scale).
Component
Part#
U1
AAT3175
U2
PIC12F675
D1
R1 – R3
C1 – C4
J1, J2
LED0
LED7
C5
R4, R5
R6
R7
JPx
JP7, JP8
VR4
SW1 – SW3
LMFLC4500
Chip Resistor
GRM188R61A105KA93D
PRPN401PAEN
CMD15-21UGC/TR8
CMD15-21SRC/TR8
GRM31CR70J106KA01L
Chip Resistor
Chip Resistor
Chip Resistor
Chip Resistor
Chip Resistor
EVN-5ESX50B14
PTS645TL50
Figure 3: AAT3175 Evaluation Board
Bottom Layer (not to scale).
Description
High Efficiency 1X/1.5X/2X CP for
White LED; TDFN33-12 Package
8-bit CMOS, FLASH-based μC;
8-pin PDIP package
4-Die, 2-Pin, High Luminosity LED
1kΩ, 5%, 1/4W; 1206
1μF, 10V, X5R, 10%; 0603
Connecting. Header, 2mm Zip
Green LED; 1206
Red LED; 1206
10μF, 6.3V, X7R, 10%; 1206
330Ω, 5%, 1/4W; 1206
100kΩ, 5%, 1/4W; 1206
220Ω, 5%, 1/4W; 1206
0Ω, 5%; 0603
0Ω, 5%; 0805
10K POT; 3mm Squared SMD
Switch Tact, SPST, 5mm
Manufacturer
Skyworks
Microchip
Lumimicro
Vishay
Murata
Sullins Electronics
Chicago Miniature Lamp
Chicago Miniature Lamp
Murata
Vishay
Vishay
Vishay
Vishay
Vishay
Panasonic-ECG
ITT Industries
Table 2: AAT3175 Evaluation Board Component Listing.
12
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
202101B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • March 5, 2013
DATA SHEET
AAT3175
High Efficiency 1X/1.5X/2X Charge Pump for White LED Flash Applications
Ordering Information
Package
Marking1
Part Number (Tape and Reel)2
TDFN33-12
QAXYY
AAT3175IWP-T1
Skyworks Green™ products are compliant with
all applicable legislation and are halogen-free.
For additional information, refer to Skyworks
Definition of Green™, document number
SQ04-0074.
Package Information
TDFN33-123
Index Area
0.40 ± 0.05
Detail "A"
0.45 ± 0.05
2.40 ± 0.05
3.00 ± 0.05
0.1 REF
C0.3
3.00 ± 0.05
1.70 ± 0.05
Top View
Bottom View
0.23 ± 0.05
Pin 1 Indicator
(optional)
0.05 ± 0.05
0.23 ± 0.05
0.75 ± 0.05
Detail "A"
Side View
All dimensions in millimeters.
1. XYY = assembly and date code.
2. Sample stock is generally held on part numbers listed in BOLD.
3. The leadless package family, which includes QFN, TQFN, DFN, TDFN and STDFN, has exposed copper (unplated) at the end of the lead terminals due to the manufacturing
process. A solder fillet at the exposed copper edge cannot be guaranteed and is not required to ensure a proper bottom solder connection.
Copyright © 2012, 2013 Skyworks Solutions, Inc. All Rights Reserved.
Information in this document is provided in connection with Skyworks Solutions, Inc. (“Skyworks”) products or services. These materials, including the information contained herein, are provided by Skyworks as a
service to its customers and may be used for informational purposes only by the customer. Skyworks assumes no responsibility for errors or omissions in these materials or the information contained herein. Skyworks may change its documentation, products, services, specifications or product descriptions at any time, without notice. Skyworks makes no commitment to update the materials or information and shall have no
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Skyworks, the Skyworks symbol, and “Breakthrough Simplicity” are trademarks or registered trademarks of Skyworks Solutions, Inc., in the United States and other countries. Third-party brands and names are for
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Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
202101B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • March 5, 2013
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