AAT3167ISN-T1 [ANALOGICTECH]
High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications; 高效率1X / 1.5X / 2X电荷泵白光LED应用
| 型号： | AAT3167ISN-T1 |
| 厂家： | 
ADVANCED ANALOGIC TECHNOLOGIES |
| 描述： | High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications |
| 文件： | 总14页 (文件大小：420K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
AAT3167
High Efficiency 1X/1.5X/2X Charge
Pump for White LED Applications
™
ChargePump
General Description
Features
The AAT3167 is a low noise, constant frequency
charge pump DC/DC converter that uses a tri-
mode load switch (1X), fractional (1.5X), and dou-
bling (2X) conversion to maximize efficiency for
white LED applications. The AAT3167 is capable of
driving five LEDs for a total of 135mA from a 2.7V
to 5.5V input. The current sinks may be operated
individually or in parallel for driving higher current
LEDs. A low external parts count (two 1µF flying
capacitors and two small 1µF capacitors at IN and
OUTCP) make this part ideally suited for small,
battery-powered applications.
•
•
VIN Range: 2.7V to 5.5V
Fully Programmable Current with Single Wire
— 16-Step Logarithmic Scale
— 14/18/27mA Max Current
— Four Low-Current Settings Down to 115µA
— Low IQ (50µA) for Single-Channel, Low-
Current Mode
Tri-Mode 1X, 1.5X, 2X Charge Pump for
Maximum Efficiency and VF Coverage
Drives Up to Five LEDs
Individual Main-Sub (4-1) Group Control
No Inductors, Low Noise Operation
1MHz Constant Switching Frequency
Small Application Circuit
•
•
•
•
•
•
•
•
•
•
•
AnalogicTech's AS2Cwire™ (Advanced Simple
Serial Control™) serial digital input is used to
enable, disable, and set current for each LED with
a 16-level logarithmic scale plus four low-current
settings down to 115µA. For optimized efficiency,
low-current settings require only 50µA of house-
keeping current.
Built-In Thermal Protection
Built-In Auto-Disable for Open Circuit
Automatic Soft Start
IQ <1µA in Shutdown
TDFN34-16 or QFN44-16 Package
Each output of the AAT3167 is equipped with built-
in protection for output short circuit and auto-dis-
able for load short-circuit conditions. Built-in soft-
start circuitry prevents excessive inrush current
during start-up. A low-current shutdown feature dis-
connects the load from the input and reduces qui-
escent current to less than 1µA.
Applications
•
•
•
•
•
Color (RGB) Lighting
Programmable Current Sink
Transmissive LCD Display
White LED Backlighting
The AAT3167 is available in a Pb-free, space-sav-
ing, thermally-enhanced, 16-pin 3x4mm TDFN or
16-pin 4x4mm QFN package and is rated over the
-40°C to +85°C temperature range.
White Photo Flash for Digital Still Cameras
Typical Application
C1+
C2+
C1
1µF
C2
1µF
C1-
IN
C2-
OUTCP
2.7V to 5.5V
COUT
1µF
CIN
1µF
D1
D2
D3
D4
D5
AAT3167
GND
D1
D2
D3
D4
D5
EN/SET
EN/SET
3167.2006.05.1.3
1
AAT3167
High Efficiency 1X/1.5X/2X Charge
Pump for White LED Applications
Pin Descriptions
Pin #
Symbol
Function
1, 3
2
N/C
No connection.
AS2Cwire serial interface control pin.
EN/SET
OUTCP
4
Charge pump output to drive load circuit. Requires 1µF capacitor connected between this
pin and ground.
5
6
C2+
C1+
C1-
C2-
GND
IN
Flying capacitor 2 positive terminal. Connect a 1µF capacitor between C2+ and C2-.
Flying capacitor 1 positive terminal. Connect a 1µF capacitor between C1+ and C1-.
7
Flying capacitor 1 negative terminal.
8
Flying capacitor 2 negative terminal.
9, 11
10
12
13
14
15
16
EP
Ground.
Input power supply. Requires 1µF capacitor connected between this pin and ground.
D1
Current sink input #1.
D2
Current sink input #2.
D3
Current sink input #3.
D4
Current sink input #4.
D5
Current sink input #5.
Exposed paddle (bottom); connect to ground as closely as possible to the package.
Pin Configuration
TDFN34-16
(Top View)
QFN44-16
(Top View)
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
D5
N/C
EN/SET
N/C
D4
1
2
3
4
12
11
10
9
D3
N/C
EN/SET
N/C
D1
OUTCP
C2+
D2
GND
IN
D1
C1+
GND
IN
C1-
OUTCP
GND
C2-
GND
2
3167.2006.05.1.3
AAT3167
High Efficiency 1X/1.5X/2X Charge
Pump for White LED Applications
Absolute Maximum Ratings1
Symbol
Description
Value
Units
VIN
Input Voltage to GND
-0.3 to 6
-0.3 to VIN + 0.3
150
V
V
VEN/SET
EN/SET Voltage to GND
2
IOUT
Maximum DC Output Current
mA
°C
°C
TJ
Operating Junction Temperature Range
Maximum Soldering Temperature (at leads, 10 sec)
-40 to 150
300
TLEAD
Thermal Information3
Symbol
Description
Value
Units
QFN44-164
TDFN34-164
QFN44-16
TDFN34-16
PD
Maximum Power Dissipation
2.0
W
θJA
Maximum Thermal Resistance
50
°C/W
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.
3167.2006.05.1.3
3
AAT3167
High Efficiency 1X/1.5X/2X Charge
Pump for White LED 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 = 3.6V.
Symbol
Description
Conditions
Min Typ Max Units
Input Power Supply
VIN Operation Range
2.7
5.5
V
1X Mode, 3.0 ≤ VIN ≤ 5.5, Active,
No Load Current, High Current Mode
1.5X Mode, 3.0 ≤ VIN ≤ 5.5, Active,
No Load Current, High Current Mode
2X Mode, 3.0 ≤ VIN ≤ 5.5, Active,
No Load Current, High Current Mode
1X Mode, 3.0 ≤ VIN ≤ 5.5, D5 Active,
IDS = 100µA, Low Current Mode
VEN/SET = 0V
0.3
1
mA
ICC
Operating Current
1
50
µA
ISHDN
IDX
Shutdown Current
1
µA
%
%
%
High Current Accuracy
Low Current Accuracy
Current Matching2
ISET = 18mA, TA = 25°C
-10
10
ISET = 400µA, TA = 25°C
15
I(D-Match)
VTH
VF:D1:D5 = 3.6V
0.5
1
1X to 1.5X or 1.5X to 2X Transition
Threshold at Any ISINK Pin
150
mV
Charge Pump Section
TSS
FCLK
Soft-Start Time
100
µs
Clock Frequency
1000
kHz
EN/SET
VEN(L)
Enable Threshold Low
Enable Threshold High
EN/SET Low Time
VIN = 2.7V
VIN = 5.5V
0.4
75
V
V
VEN(H)
1.4
0.3
TEN/SET LO
TEN/SET HI
µs
ns
µs
µs
µs
µA
Minimum EN/SET High Time
50
TEN/SET HI MAX Maximum EN/SET High Time
75
500
500
1
TOFF
TLAT
EN/SET Off Timeout
EN/SET Latch Timeout
EN/SET Input Leakage
IEN/SET
-1
1. The AAT3167 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
3167.2006.05.1.3
AAT3167
High Efficiency 1X/1.5X/2X Charge
Pump for White LED Applications
Typical Characteristics
CIN = COUT = C1 = C2 = 1.0µF; TA = 25°C, VIN = 3.6V, unless otherwise noted.
Efficiency vs. Supply Voltage
Turn-On to 1X Mode
(VIN = 4.2V; 18mA Load)
100
5.1mA
VF = 3.0V
18mA
VF = 3.4V
90
80
70
60
50
40
30
20
10
0
EN
(2V/div)
OUT
(2V/div)
VSINK
(500mV/div)
350μA
VF = 2.7V
IIN
(200mA/div)
2.5 2.8 3.0 3.3 3.5 3.8 4.0 4.3 4.5 4.8 5.0 5.3 5.5
Supply Voltage (V)
100μs/div
Turn-On to 1.5X Mode
(VIN = 3.5V; 18mA Load)
Turn-On to 2X Mode
(VIN = 2.8V; 18mA Load)
EN
(2V/div)
EN
(2V/div)
OUT
(2V/div)
OUT
(2V/div)
VSINK
(500mV/div)
VSINK
(500mV/div)
IIN
(200mA/div)
IIN
(200mA/div)
100μμs/div
100μμs/div
Turn-Off from 1.5X Mode
(VIN = 3.5V; 18mA Load)
Current Matching vs. Temperature
19.0
18.8
18.6
18.4
18.2
18.0
17.8
17.6
17.4
17.2
17.0
EN
(2V/div)
Channel 2
Channel 3
VF
(1V/div)
Channel 4
Channel 1
Channel 5
IIN
(100mA/div)
-40
-20
0
20
40
60
80
100μμs/div
Temperature (°°C)
3167.2006.05.1.3
5
AAT3167
High Efficiency 1X/1.5X/2X Charge
Pump for White LED Applications
Typical Characteristics
CIN = COUT = C1 = C2 = 1.0µF; TA = 25°C, VIN = 3.6V, unless otherwise noted.
Load Characteristics
(VIN = 3.9V; 1.5X Mode; 18mA Load)
Load Characteristics
(VIN = 2.9V; 2X Mode; 18mA Load)
VIN
(40mV/div)
VIN
(40mV/div)
CP
(40mV/div)
CP
(40mV/div)
VSINK
(40mV/div)
VSINK
(40mV/div)
500ns/div
500ns/div
Load Characteristics
(VIN = 4.2V; 1.5X Mode; 27mA Load)
Load Characteristics
(VIN = 3.3V; 2X Mode; 27mA Load)
VIN
(40mV/div)
VIN
(40mV/div)
CP
(40mV/div)
CP
(40mV/div)
VSINK
(40mV/div)
VSINK
(40mV/div)
500ns/div
500ns/div
Input Ripple vs. Input Voltage
18
16
14
12
10
8
27mA
18mA
6
14mA
4
2
0
2.5
2.7
2.9
3.1
3.3
3.5
3.7
3.9
4.1
4.3
4.5
Input Voltage (V)
6
3167.2006.05.1.3
AAT3167
High Efficiency 1X/1.5X/2X Charge
Pump for White LED Applications
Typical Characteristics
CIN = COUT = C1 = C2 = 1.0µF; TA = 25°C, VIN = 3.6V, unless otherwise noted.
TLAT vs. VIN
TOFF vs. VIN
350
300
250
200
150
100
50
400
350
300
250
200
150
100
50
-40°C
-40°C
85°C
25°C
25°C
85°C
0
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
VIN (V)
VIN (V)
VIH vs. VIN
VIL vs. VIN
1.2
1.1
1
1.2
1.1
1
-40°C
-40°C
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
25°C
85°C
25°C
85°C
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
VIN (V)
VIN (V)
3167.2006.05.1.3
7
AAT3167
High Efficiency 1X/1.5X/2X Charge
Pump for White LED Applications
Functional Block Diagram
C1+ C1- C2+ C2-
1X, 1.5X, 2X
Charge Pump
IN
OUTCP
Soft-Start
Control
1MHz
Oscillator
Voltage
Reference
D/A
D/A
D/A
D/A
D1
6 x 16 Bit
ROM
D2
D3
D4
AS2Cwire
EN/SET
Interface
6 x 16 Bit
ROM
D/A
D5
GND
capacitor (CIN), and one 0.33µF to 1µF ceramic
charge pump output capacitor (COUT).
Functional Description
The AAT3167 is a tri-mode load switch (1X) and
high efficiency (1.5X or 2X) charge pump device
intended for white LED backlight 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 AAT3167
charge pump is enabled when any of the five cur-
rent sink inputs near dropout. The charge pump ini-
tially starts in 1.5X mode. If the charge pump out-
put droops enough for any current source output to
become close to dropout, the charge pump will
automatically transition to 2X mode. The AAT3167
requires only four external components: two 1µF
ceramic capacitors for the charge pump flying
capacitors (C1 and C2), one 1µF ceramic input
The five constant current sink inputs (D1 to D5) can
drive five individual LEDs with a maximum current
of 27mA nominal each. Unused sink inputs should
be connected to OUTCP, otherwise the part will
operate only in 2X charge pump mode. The
AS2Cwire serial interface enables the AAT3167 and
sets the current sink magnitudes. AS2Cwire
addressing allows independent control of two
groups of current sink input: D1~D4 and D5.
Constant Current Output Level Settings
The constant current sink levels for D1 to D5 are
set via the serial interface according to a logarith-
mic scale, where each code is approximately 1.8dB
lower than the previous code. In this manner, LED
brightness appears linear with each increasing
code count. Because the inputs D1 to D5 are true
8
3167.2006.05.1.3
AAT3167
High Efficiency 1X/1.5X/2X Charge
Pump for White LED Applications
AS2Cwire Serial Interface
independent constant current sinks, the voltage
observed on any single given input will be deter-
mined by the actual forward voltage (VF) for the
LED being driven.
The current sink input magnitude on AAT3167 is con-
trolled by AnalogicTech's AS2Cwire serial digital input.
AS2Cwire adds addressing capability for multiple
data registers over the Simple Serial Control™
(S2Cwire™) interface, which is only capable of con-
trolling a single register. The AAT3167 has four reg-
isters: Bank1, Bank2, Max Current, and Low Current.
Since the input current sinks of the AAT3167 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." With its high-speed serial interface (1MHz
data rate), the input sink current of the AAT3167 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.
Three addresses are used to control the two regis-
ters. Address 0 addresses both registers simulta-
neously to allow the loading of both registers with
the same data using a single write protocol.
Address 1 addresses Register 1 for D1 to D4 cur-
rent level settings. Address 2 addresses Register 2
for D5 current level settings.
AS2Cwire relies on the number of rising edges of the
EN/SET pin to address and load the registers.
AS2Cwire latches data or address after the EN/SET
pin has been held high for time TLAT. Address or data
is differentiated by the number of EN/SET rising
edges. Since the data registers are 4 bits each, the
differentiating number of pulses is 24 or 16, so that
Address 0 is signified by 17 rising edges, Address 1
by 18 rising edges, and Address 2 by 19 rising
edges. Data is set to any number of rising edges
between 1 and including 16. A typical write protocol
is a burst of EN/SET rising edges signifying a partic-
ular address, followed by a pause with EN/SET held
high for the TLAT timeout period, a burst of rising
edges signifying data, and a TLAT timeout for the data
registers. Once an address is set, then multiple
writes consisting of data only (without address) to the
corresponding data register are allowed. Address 0
is the default address on the first rising edge after the
AAT3167 has been disabled. If data is presented on
the first rising edge with no prior address, both data
registers are simultaneously loaded.
The 16 individual current level settings are each
approximately 2dB apart (see Table 1); the spacing
at higher settings is less than 2dB, whereas at lower
settings it is greater. Code 1 is full scale; Code 15 is
full scale attenuated by approximately 30dB; and
Code 16 is reserved as a "no current" setting.
27mA Max 18mA Max 14mA Max
Data
IOUT (mA)
IOUT (mA)
IOUT (mA)
1
2
27
22
18
14
12
10
8
18
15
14
11
3
12
8.8
7.1
6.0
4.8
3.8
3.1
2.6
2.1
1.7
1.4
1.2
1.0
0.7
0
4
10
5
7.9
6.3
5.1
4.1
3.5
2.9
2.2
1.9
1.6
1.3
1.0
0
6
7
8
6.2
5.2
4.3
3.3
2.9
2.4
1.9
1.4
0
9
10
11
12
13
14
15
16
The maximum current level is determined by the
value set in Register 3, the Max Current register.
Three scales are available for high operating cur-
rents with maximum current levels of 27mA, 18mA,
or 14mA. Each scale maintains approximately
1.8dB steps between settings. A separate mode is
available for ultra-low LED current operation. When
Table 1: Current Level Settings.
3167.2006.05.1.3
9
AAT3167
High Efficiency 1X/1.5X/2X Charge
Pump for White LED Applications
the Max Current register (Register 3) is set to the
Low Current setting, the Low Current register
(Register 4) must be programmed. The two most
significant bits of the Low Current register control
whether or not a given bank of current sinks is
enabled. The least two significant bits of the Low
Current register set the current level for both
banks. For low-current settings, the charge pump
may be enabled if required by the battery voltage
and LED forward voltage conditions, and 1X mode
quiescent current is approximately 100µA for multi-
ple channels or 50µA for Channel 5 operation only.
Both banks of current sinks must be in the same
high- or low-current mode of operation.
Low Current Register (Address 4)
Main Low
Sub Low
Data
Current On Current On Current
1
2
No
No
No
No
3
No
No
4
No
No
5
No
Yes
Yes
Yes
Yes
No
115µA
175µA
280µA
400µA
115µA
175µA
280µA
400µA
115µA
175µA
280µA
400µA
6
No
7
No
8
No
9
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
10
11
12
13
14
15
16
No
When EN/SET is held low for an amount of time
greater than TOFF, the AAT3167 enters shutdown
mode and draws less than 1µA from VIN. Data and
Address registers are reset to 0 during shutdown.
No
No
Yes
Yes
Yes
Yes
AS2Cwire Serial Interface Addressing
EN/SET
Address Rising Edges
Data Register
AAT3167
Auto-Disable Feature
The AAT3167 is equipped with an auto-disable fea-
ture for each LED channel. After the IC is enabled
and started up, a test current of 120µA (typical) is
forced through each sink channel. The channel will
be disabled if the voltage of that particular SINK pin
does not drop to a certain threshold. This feature is
very convenient for disabling an unused channel or
during an LED fail-short event.
0
1
2
3
4
17
18
19
20
21
1&2: D1~D5 Current
1: D1~D4 Current
2: D5 Current
3: Max Current
4: Low Current
Data
Max Current
1
2
3
4
18mA
27mA
Thermal Protection
14mA
The AAT3167 has a built-in thermal protection cir-
cuit that will shut down the charge pump if the die
temperature rises above the thermal limit, as would
be the case during a short circuit of the OUTCP pin.
Low Current
(see Low Current Register for values)
10
3167.2006.05.1.3
AAT3167
High Efficiency 1X/1.5X/2X Charge
Pump for White LED Applications
AS2Cwire Serial Interface Timing
Address
Data
THI
TLAT
TLO
TLAT
EN/SET
Address
1
2
17
18
1
2 . . .
n <= 16
0
1
0
0
n
Data Reg 1
Data Reg 2
Device Switching Noise Performance
Applications Information
The AAT3167 operates at a fixed frequency of
approximately 1MHz to control noise and limit har-
monics that can interfere with the RF operation of
cellular telephone handsets or other communica-
tion 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 solu-
tions. The AAT3167 soft-start feature prevents
noise transient effects associated with inrush cur-
rents during start-up of the charge pump circuit.
LED Selection
Although the AAT3167 is designed for driving white
LEDs, the device also can be used to drive most
types of LEDs with forward voltage specifications
ranging from 2.0V to 4.7V. LED applications may
include main and sub-LCD display backlighting,
camera photo-flash applications, color (RGB)
LEDs, infrared diodes for remotes, and other loads
benefiting from a controlled output current generat-
ed from a varying input voltage. Since the D1 to D5
input current sinks are matched with negligible
voltage dependence, the LED brightness will be
matched regardless of the specific LED forward
voltage (VF) levels.
Capacitor Selection
Careful selection of the four external capacitors
(CIN, C1, C2, COUT) is important because they will
affect turn-on time, output ripple, and transient per-
formance. Optimum performance will be obtained
when low equivalent series resistance (ESR)
(<100mΩ) ceramic capacitors are used. A value of
1µF for all four capacitors is a good starting point
when choosing capacitors. If the LED current
sources are programmed only for light current lev-
els, then the capacitor size may be decreased.
In some instances (e.g., in high-luminous-output
applications such as photo flash), it may be neces-
sary to drive high-VF type LEDs. The low-dropout
current sinks in the AAT3167 make it capable of
driving LEDs with forward voltages as high as 4.7V
at full current from an input supply as low as 3.0V.
Outputs can be paralleled to drive high-current
LEDs without complication.
3167.2006.05.1.3
11
AAT3167
High Efficiency 1X/1.5X/2X Charge
Pump for White LED Applications
Capacitor Characteristics
Ceramic Capacitor Materials
Ceramic composition capacitors are highly recom-
mended over all other types of capacitors for use
with the AAT3167. Ceramic capacitors offer many
advantages over their tantalum and aluminum elec-
trolytic counterparts. A ceramic capacitor typically
has very low ESR, is lowest cost, has a smaller
PCB footprint, and is non-polarized. Low-ESR
ceramic capacitors help maximize charge pump
transient response. Since ceramic capacitors are
non-polarized, they are not prone to incorrect con-
nection damage.
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 val-
ues 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
AAT3167 applications.
Capacitor area is another contributor to ESR.
Capacitors that are physically large will have a lower
ESR when compared to an equivalent material
smaller capacitor. These larger devices can improve
circuit transient response when compared to an
equal value capacitor in a smaller package size.
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 con-
nections, 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.
12
3167.2006.05.1.3
AAT3167
High Efficiency 1X/1.5X/2X Charge
Pump for White LED Applications
Ordering Information
Package
TDFN34-16
QFN44-16
Marking1
Part Number (Tape and Reel)2
AAT3167ISN-T1
PWXYY
All AnalogicTech products are offered in Pb-free packaging. The term “Pb-free” means
semiconductor products that are in compliance with current RoHS standards, including
the requirement that lead not exceed 0.1% by weight in homogeneous materials. For more
information, please visit our website at http://www.analogictech.com/pbfree.
Package Information
TDFN34-16
Detail "B"
Index Area
(D/2 x E/2)
0.35 0.10
0.20 MIN
0.075 0.075
Detail "A"
3.00 0.05
Pin 1 Indicator
(optional)
Top View
Bottom View
7.5° 7.5°
Detail "B"
0.05
0.229 0.051
0.05
Option A:
Option B:
C0.30 (4x) max
Chamfered corner
R0.30 (4x) max
Round corner
Side View
Detail "A"
All dimensions in millimeters.
1. XYY = assembly and date code.
2. Sample stock is generally held on part numbers listed in BOLD.
3167.2006.05.1.3
13
AAT3167
High Efficiency 1X/1.5X/2X Charge
Pump for White LED Applications
QFN44-16
Pin 1 Identification
0.330 0.050
13
Pin 1 Dot By Marking
16
1
4
R0.030Max
9
8
5
4.000 0.050
2.280 REF
Top View
Bottom View
0.203 0.025
Side View
All dimensions in millimeters.
© Advanced Analogic Technologies, Inc.
AnalogicTech cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in an AnalogicTech product. No circuit patent licenses, copyrights, mask work rights,
or other intellectual property rights are implied. AnalogicTech reserves the right to make changes to their products or specifications or to discontinue any product or service without notice.
Customers are advised to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. All products are sold sub-
ject to the terms and conditions of sale supplied at the time of order acknowledgement, including those pertaining to warranty, patent infringement, and limitation of liability. AnalogicTech
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trol techniques are utilized to the extent AnalogicTech deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily performed.
AnalogicTech and the AnalogicTech logo are trademarks of Advanced Analogic Technologies Incorporated. All other brand and product names appearing in this document are regis-
tered trademarks or trademarks of their respective holders.
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830 E. Arques Avenue, Sunnyvale, CA 94085
Phone (408) 737-4600
Fax (408) 737-4611
14
3167.2006.05.1.3
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