AAT3169IFO-T1 [AAT]
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： | AAT3169IFO-T1 |
| 厂家： | 
ADVANCED ANALOG TECHNOLOGY, INC. |
| 描述： | High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications |
| 文件： | 总14页 (文件大小：438K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
AAT3169
High Efficiency 1X/1.5X/2X Charge
Pump for White LED Applications
™
ChargePump
General Description
Features
The AAT3169 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 applications. The AAT3169 is capable of driv-
ing six LEDs for a total of 180mA from a 2.7V to
5.5V input. The current sinks may be operated indi-
vidually 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-pow-
ered applications.
•
•
VIN Range: 2.7V to 5.5V
Fully Programmable Current with Single Wire
— 16-Step Logarithmic Scale
— 15/20/30mA Max Current
— Four Low-Current Settings Down to 115µA
— Low IQ (65µA) for Single-Channel, Low-
Current Mode
Tri-Mode 1X, 1.5X, and 2X Charge Pump for
Maximum Efficiency and VF Coverage
Drives Up to Six LEDs
Individual Main-Sub (5-1) Group Control
No Inductors, Low Noise Operation
1MHz Constant Switching Frequency
Small Application Circuit
Built-In Thermal Protection
Built-In Auto-Disable for Open Circuit
Automatic Soft Start
IQ <1µA in Shutdown
Thermally-Enhanced STDFN33-14 or
QFN44-16 Package
•
•
•
•
•
•
•
•
•
•
•
AnalogicTech's AS2Cwire™ (Advanced Simple Serial
Control™) serial digital input is used to enable, dis-
able, 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 set-
tings require only 65µA of housekeeping current.
Each output of the AAT3169 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 Displays
White LED Backlighting
White Photo Flash for Digital Still Cameras
The AAT3169 is available in a Pb-free, space-sav-
ing, thermally-enhanced 16-pin 4x4mm QFN pack-
age or a low-profile 14-pin 3x3mm STDFN pack-
age and is rated over the -40°C to +85°C tempera-
ture range.
Typical Application
C1+
C1-
C2+
C1
1µF
C2
1µF
Main
Sub
D6
C2-
OUTCP
COUT
1µF
IN
2.7V to 5.5V
CIN
1µF
D1
D2
D3
D4
D5
AAT3169
D1
D2
D3
D4
D5
D6
EN/SET
EN/SET
3169.2006.08.1.2
1
AAT3169
High Efficiency 1X/1.5X/2X Charge
Pump for White LED Applications
Pin Descriptions
Pin #
AAT3169ISN AAT3169IFP
Symbol
Function
1
2
3
4
2
3
D6
Current sink input #6.
AS2Cwire serial interface control pin.
EN/SET
N/C
n/a
6
No connection.
OUTCP
Charge pump output to drive load circuit. Requires 1µF capacitor con-
nected between this pin and ground.
5
6
7
4
C2+
C1+
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
8
5
8
C1-
C2-
GND
IN
Flying capacitor 1 negative terminal.
Flying capacitor 2 negative terminal.
9, 11
10
10
9
Ground.
Input power supply. Requires 1µF capacitor connected between this pin
and ground.
12
13
14
15
16
EP
11
12
13
14
1
D1
D2
D3
D4
D5
Current sink input #1.
Current sink input #2.
Current sink input #3.
Current sink input #4.
Current sink input #5.
n/a
Exposed paddle (bottom); connect to ground as closely as possible to
the package.
Pin Configuration
QFN44-16
(Top View)
STDFN33-14
(Top View)
1
2
14
13
D5
D6
EN/SET
C1+
C1-
D4
D3
D2
D1
GND
IN
C2-
1
2
3
4
12
11
10
9
D6
EN/SET
N/C
D1
3
4
5
6
7
12
11
10
9
GND
IN
OUTCP
C2+
8
OUTCP
GND
2
3169.2006.08.1.2
AAT3169
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
210
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
STDFN33-144
QFN44-16
PD
Maximum Power Dissipation
2.0
W
θJA
Maximum Thermal Resistance
50
°C/W
STDFN33-14
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.
3169.2006.08.1.2
3
AAT3169
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 at TA = 25°C,
VIN = 3.6V.
Symbol Description
Input Power Supply
Conditions
Min Typ Max Units
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, D6 Active,
No Load Current, Low Current Mode
VEN/SET = 0V
0.3
1
mA
ICC
Operating Current
1
65
90
µA
µA
ISHDN
IDX
Shutdown Current
Current Accuracy
1
I
SET = 20mA, TA = 25°C
-10
-20
-20
10
20
20
1
ISET = 2.4mA, TA = 25°C
ISET = 400µA, TA = 25°C
VF:D1:D6 = 3.6V
%
Low Current Accuracy
Current Matching2
I(D-Match)
VTH
0.5
%
1X to 1.5X or 1.5X to 2X Transition
Threshold at Any ISINK Pin
ISET = 20mA
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
VIN = 2.7V
VIN = 5.5V
0.4
75
V
V
VEN(H)
1.4
0.3
TEN/SET LO EN/SET Low Time
µs
ns
µs
µs
µs
µA
TEN/SET HI MIN 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 AAT3169 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
3169.2006.08.1.2
AAT3169
High Efficiency 1X/1.5X/2X Charge
Pump for White LED Applications
Typical Characteristics
CIN = COUT = C1 = C2 = 1.0µF, VIN = 3.6V, TA = 25°C, unless otherwise noted.
Turn-On to 1X Mode
(VIN = 4.2V; 20mA/Channel)
Efficiency vs. Supply Voltage
100
4.9mA/ch
VF = 2.9V
10.9mA/ch
VF = 3.1V
20mA/ch
VF = 3.4V
EN
(2V/div)
90
80
70
60
50
CP
(2V/div)
VSINK
(500mV/div)
IIN
(200mA/div)
2.8
3.0
3.2
3.4
3.6
3.8
4.0
4.2
Time (100µs/div)
Supply Voltage (V)
Turn-On to 1.5X Mode
(VIN = 3.8V; 20mA/Channel)
Turn-On to 2X Mode
(VIN = 2.8V; 20mA/Channel)
EN
(2V/div)
EN
(2V/div)
CP
(2V/div)
CP
(2V/div)
VSINK
(500mV/div)
VSINK
(500mV/div)
IIN
(200mA/div)
IIN
(200mA/div)
Time (100µs/div)
Time (100µs/div)
Turn-Off from 1.5X Mode
(VIN = 3.5V; 20mA/Channel)
Current Matching vs. Temperature
20.2
20.0
19.8
19.6
19.4
19.2
Channel 1
Channel 2
EN
(2V/div)
Channel 5
VF
(1V/div)
Channel 3
IIN
(100mA/div)
Channel 4
Channel 6
60
-40
-20
0
20
40
80
Time (100µs/div)
Temperature (°°C)
3169.2006.08.1.2
5
AAT3169
High Efficiency 1X/1.5X/2X Charge
Pump for White LED Applications
Typical Characteristics
CIN = COUT = C1 = C2 = 1.0µF, VIN = 3.6V, TA = 25°C, unless otherwise noted.
Load Characteristics
(VIN = 3.8V; 1.5X Mode; 15mA/Channel)
Load Characteristics
(VIN = 2.9V; 2X Mode; 15mA/Channel)
VIN
(40mV/div)
VIN
(40mV/div)
CP
(40mV/div)
CP
(40mV/div)
VSINK
(40mV/div)
VSINK
(40mV/div)
Time (500ns/div)
Time (500ns/div)
Load Characteristics
(VIN = 4.0V; 1.5X Mode; 20mA/Channel)
Load Characteristics
(VIN = 3.1V; 2X Mode; 20mA/Channel)
VIN
(40mV/div)
VIN
(40mV/div)
CP
(40mV/div)
CP
(40mV/div)
VSINK
(40mV/div)
VSINK
(40mV/div)
Time (500ns/div)
Time (500ns/div)
Load Characteristics
(VIN = 4.3V; 1.5X Mode; 30mA/Channel)
Load Characteristics
(VIN = 3.6V; 2X Mode; 30mA/Channel)
VIN
(40mV/div)
VIN
(40mV/div)
CP
(40mV/div)
CP
(40mV/div)
VSINK
(40mV/div)
VSINK
(40mV/div)
Time (500ns/div)
Time (500ns/div)
6
3169.2006.08.1.2
AAT3169
High Efficiency 1X/1.5X/2X Charge
Pump for White LED Applications
Typical Characteristics
CIN = COUT = C1 = C2 = 1.0µF, VIN = 3.6V, TA = 25°C, 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
Input Ripple vs. VIN
1.2
1.1
1
25
20
15
10
5
-40°C
30mA/ch
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
25°C
85°C
20mA/ch
10.9mA/ch
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
2.50 2.67 2.84 3.01 3.18 3.35 3.52 3.69 3.86 4.03 4.20
VIN (V)
VIN (V)
VIL vs. VIN
1.2
1.1
1
-40°C
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
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
VIN (V)
3169.2006.08.1.2
7
AAT3169
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
D1
D/A
D/A
D/A
D/A
D/A
D2
D3
D4
D5
Main
6 x 16 Bit
ROM
AS2Cwire
EN/SET
Interface
Sub
6 x 16 Bit
ROM
D/A
D6
GND
The six constant current sink inputs (D1 to D6) can
drive six individual LEDs with a maximum current
of 30mA 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 AAT3169 and
sets the current sink magnitudes. AS2Cwire
addressing allows independent control of two
groups of current sink input: D1~D5 and D6.
Functional Description
The AAT3169 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 AAT3169
charge pump is enabled when any of the six current
sink inputs near 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 AAT3169
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).
Constant Current Output Level Settings
The constant current sink levels for D1 to D6 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 D6 are true
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.
8
3169.2006.08.1.2
AAT3169
High Efficiency 1X/1.5X/2X Charge
Pump for White LED Applications
AS2Cwire Serial Interface
Since the input current sinks of the AAT3169 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 man-
age LED or display brightness, allowing the user to
"set it and forget it." With its high-speed serial inter-
face (1MHz data rate), the input sink current of the
AAT3169 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 current sink input magnitude on the AAT3169
is controlled by AnalogicTech's Advanced Simple
Serial Control (AS2Cwire) serial digital input.
AS2Cwire adds addressing capability for multiple
data registers over the Simple Serial Control™
(S2Cwire™), which is only capable of controlling a
single register. The AAT3169 has four registers:
Bank1, Bank2, Max Current, and Low Current.
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 D5 cur-
rent level settings. Address 2 addresses Register 2
for D6 current level settings.
The 16 individual current level settings are each
approximately 1.8dB apart (see Table 1). Code 1 is
full scale; Code 15 is full scale attenuated by
approximately 25dB; and Code 16 is reserved as a
"no current" setting.
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 ris-
ing 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, signify-
ing a particular 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 regis-
ter are allowed. Address 0 is the default address
on the first rising edge after the AAT3169 has been
disabled. If data is presented on the first rising
edge with no prior address, both data registers are
simultaneously loaded.
Mean
Mean
Mean
Data 30mA Max 20mA Max 15mA Max
1
2
30.0
29.3
27.8
25.2
22.8
20.9
18.5
16.1
13.7
10.0
9.4
20.0
19.5
18.5
17.5
15.4
14.2
12.5
10.9
9.3
15.0
14.6
13.9
12.7
11.5
10.5
9.3
3
4
5
6
7
8
8.1
9
7.0
10
11
12
13
14
15
16
8.0
6.0
6.5
4.9
7.0
4.9
3.7
4.7
3.3
2.6
3.3
2.4
1.9
1.9
1.5
1.2
0.0
0.0
0.0
Table 1: Mean Table of AAT3169 Output Current.
3169.2006.08.1.2
9
AAT3169
High Efficiency 1X/1.5X/2X Charge
Pump for White LED Applications
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 30mA, 20mA,
or 15mA. Each scale maintains approximately
1.8dB steps between settings. A separate mode is
available for ultra-low LED current operation.
When the Max Current register (Register 3) is set
to the Low Current setting, the Low Current regis-
ter (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 sets 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 130µA for multi-
ple channels or 65µA for Channel 6 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
No
No
Yes
Yes
Yes
Yes
When EN/SET is held low for an amount of time
greater than TOFF, the AAT3169 enters shutdown
mode and draws less than 1µA from the input.
Data and Address registers are reset to 0 during
shutdown.
Auto-Disable Feature
AAT3169 is equipped with an auto-disable feature
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.
AS2Cwire Serial Interface Addressing
EN/SET
Address Rising Edges
Data Register
AAT3169
0
1
2
3
4
17
18
19
20
21
1&2: D1~D6 Current
1: D1~D5 Current
2: D6 Current
Thermal Protection
The AAT3169 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.
3: Max Current
4: Low Current
Data
Max Current
1
2
3
4
20mA
30mA
15mA
Low Current
(see Low Current Register for values)
10
3169.2006.08.1.2
AAT3169
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 AAT3169 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 AAT3169 soft-start feature prevents
noise transient effects associated with inrush cur-
rents during start-up of the charge pump circuit.
LED Selection
Although the AAT3169 is designed for driving white
LEDs, the device also can be used to drive most
types of LEDs with forward voltages from 2.0V to
4.7V. LED applications may include main and sub-
LCD 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 vary-
ing input voltage. Since the D1 to D6 input current
sinks are matched with negligible voltage depend-
ence, the LED brightness will be matched regard-
less of the specific LED forward voltage (VF) levels.
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 ESR ceramic capacitors are
used; in general, low ESR may be defined as less
than 100mΩ. 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 levels, 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 AAT3169 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.
3169.2006.08.1.2
11
AAT3169
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 AAT3169. Ceramic capacitors offer many
advantages over their tantalum and aluminum elec-
trolytic counterparts. A ceramic capacitor typically
has very low equivalent series resistance (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 connection 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
AAT3169 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 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
3169.2006.08.1.2
AAT3169
High Efficiency 1X/1.5X/2X Charge
Pump for White LED Applications
Ordering Information
Package
Marking1
Part Number (Tape and Reel)2
STDFN33-14
QFN44-16
UNXYY
RVXYY
AAT3169IFO-T1
AAT3169ISN-T1
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
STDFN33-14
Detail "A"
Index Area
(D/2 x E/2)
1.70 0.05
3.00 0.05
Top View
Bottom View
0.425 0.05
0.05 0.05
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.
3169.2006.08.1.2
13
AAT3169
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.
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tered trademarks or trademarks of their respective holders.
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Phone (408) 737-4600
Fax (408) 737-4611
14
3169.2006.08.1.2
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