AAT1218IWP-5.0-T1
更新时间：2024-09-18 12:56:44
品牌：SKYWORKS
描述：High Current, 1.2MHz Synchronous Boost Converterr
概述
规格参数
数据手册AAT1218IWP-5.0-T1 概述
High Current, 1.2MHz Synchronous Boost Converterr 高电流， 1.2MHz的同步升压Converterr 开关式稳压器或控制器
AAT1218IWP-5.0-T1 规格参数
| 是否Rohs认证： | 符合 | 生命周期： | Obsolete |
| Reach Compliance Code： | unknown | ECCN代码： | EAR99 |
| HTS代码： | 8542.39.00.01 | 风险等级： | 5.82 |
| 模拟集成电路 - 其他类型： | SWITCHING REGULATOR | 控制模式： | CURRENT-MODE |
| JESD-30 代码： | R-PDSO-N12 | 端子数量： | 12 |
| 最高工作温度： | 85 °C | 最低工作温度： | -40 °C |
| 最大输出电流： | 1 A | 封装主体材料： | PLASTIC/EPOXY |
| 封装代码： | SON | 封装等效代码： | SOLCC12,.12,18 |
| 封装形状： | RECTANGULAR | 封装形式： | SMALL OUTLINE |
| 认证状态： | Not Qualified | 子类别： | Switching Regulator or Controllers |
| 表面贴装： | YES | 最大切换频率： | 1500 kHz |
| 温度等级： | INDUSTRIAL | 端子形式： | NO LEAD |
| 端子节距： | 0.45 mm | 端子位置： | DUAL |
AAT1218IWP-5.0-T1 数据手册
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PDF下载DATA SHEET
AAT1218
Features
General Description
•
•
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The AAT1218 is a general purpose DC/DC synchronous
boost (step-up) converter providing a tightly regulated
DC output voltage for continuous output currents up to
1A (minimum). The maximum peak current in the boost
switch is limited to a value of 2A (minimum). Operating
input voltage must be less than the output voltage and
in the 0.5V to 5.5V range, making the device well suited
to portable equipment and consumer appliances.
2.5V to 5.5V Adjustable Output Voltage
0.5V Minimum Input Voltage
±2% Output Accuracy
No Schottky Diode Required (VOUT < 4.5V)
Up to 95% Efficiency
400μA Standby Current
<1μA Shutdown Current
Integrated Soft-Start Circuitry Limits Inrush Current
Constant Frequency 1.2MHz Operation
The boost output voltage is programmed from 2.5V to
5.5V with an external resistor divider. Optimized internal
compensation provides fast transient response with no
external components.
Inductor Height <1.8mm
Small Ceramic Capacitors
Anti-ring Circuit Reduces EMI
Current Mode Control
▪
▪
•
•
Synchronous rectification eliminates the need for an
external rectifier for output voltage less than 4.5V. Low
on-resistance internal switches provide efficiency up to
95%, which minimizes losses and simplifies packaging
and circuit board layout. An inductor, two resistors and
two ceramic output capacitors are all that are required to
implement a DC/DC boost solution.
Fast, Stable Transient Response
No External Compensation
Cycle-by-Cycle Current Limit
▪
▪
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•
Low Inrush Current with 0.7ms Soft-start
Low Output Ripple: <80mVpp for all Loading Conditions
(BW = 25MHz)
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•
•
Over-Temperature Protection
The switching frequency is internally set to 1.2MHz to
minimize external filter size and optimize switching
losses.
Adjustable and Fixed Output Versions Available
Delivers 1A to 5V Output from a Single Cell Li+
Battery
•
Integrated soft-start ensures minimal inrush current.
The “anti-ring” circuit reduces stray EMI during light
load, discontinuous operation. Input quiescient current is
less than 400μA at no load.
Low-profile TDFN33-12 Package
Applications
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DVD Players
Hard Disk Drive
MP3 Players
PDA
Portable Computers
Smart Phones
The device provides cycle-by-cycle current limit and over-
temperature protection to prevent device over-stress.
The AAT1218 is available in a Pb-free, 12-pin low profile
TDFN33 package with rating from -40°C to 85°C.
Typical Application
L1
2.2µH
L1 2.2µH
VIN: 3.6V
VOUT: 5V @ 1A
VIN: 3.6V
VOUT: 5V @ 1A
LX
OUT
LX
OUT
VAINAT1218-1.2
R2
VIN
1.02M
EN
AAT1218-5.0
EN
COUT
CIN
22µF
0805
44µF
(22µF x2)
0805
COUT
CIN
22µF
0805
FB
44µF
FB
(2x22µF)
0805
GND
R3
324k
GND
PGND
PGND
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DATA SHEET
AAT1218
High Current, 1.2MHz Synchronous Boost Converterr
Pin Description
Pin # Symbol Description
Switching node tied to drain of internal N-channel MOSFET and source of internal P-channel MOSFET. Con-
nect this pin to the external power inductor.
1
LX
2, 5
3
4
NC
VIN
EN
No connect.
Input voltage for the controller.
Input enable pin.
6, 7
GND
Non-power signal ground pin.
Feedback input pin. This pin is connected to an external resistor divider which determines the output voltage
setpoint.
8
FB
9. 10
11, 12
OUT
PGND
Output pin; connected to the positive terminal of the output capacitor and to the external resistor divider.
Power ground pin. Connect this pin directly to input and output capacitors.
Pin Configuration
TDFN33-12
(Top View)
1
2
3
4
5
6
12
11
10
9
LX
N/C
VIN
EN
PGND
PGND
OUT
OUT
FB
8
N/C
GND
7
GND
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DATA SHEET
AAT1218
High Current, 1.2MHz Synchronous Boost Converterr
Absolute Maximum Ratings1
Symbol
Description
Value
Units
LX, VIN, EN, FB Voltage to PGND
PGND Voltage to GND
Operating Junction Temperature Range
Maximum Soldering Temperature (at leads, 10 sec)
-0.3 to 6.0
-0.3 to 0.3
-40 to 150
300
V
V
C
C
Thermal Information
Symbol
Description
Maximum Power Dissipation2
Maximum Thermal Resistance – Junction to Ambient
Maximum Thermal Resistance – Junction to Case
Value
Units
PD
JA
JC
TDFN33-123
TDFN33-12
TDFN33-12
2000
50
41.68
mW
C/W
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.
2. Mounted on 1.6mm thick FR4 circuit board.
3. Derate 25mW/°C above 25°C ambient temperature.
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DATA SHEET
AAT1218
High Current, 1.2MHz Synchronous Boost Converterr
Electrical Characteristics
VIN = 1.2V, VOUT = 3.3V, COUT = 44μF, TA = 25°C unless otherwise noted.
Symbol
Description
Conditions
Min
Typ
Max Units
Minimum Start-Up Voltage
Minimum Start-Up Voltage Loaded
ILOAD = 1mA
ILOAD = 300mA (Resistive)
0.85
1.4
1
V
V
VIN
VOUT
0.5
5.5
-
Operating Input Voltage Range
TA = -40°C to +85°C
0.5
2.5
V
VOUT_RANGE
VFB
Output Voltage Range
Feedback Voltage
V
V
TA = -40°C to +85°C
1.164 1.200 1.236
Quiescient Current
Switching, No Load Operation,
Measured from VOUT
0.5 < VIN < VOUT - 0.5V, ILOAD = 0mA
300
700
μA
IQ
Quiescient Current
Device Disabled (Shut Down)
Switching Frequency
Minimum Operating Duty Cycle
Maximum Operating Duty Cycle
NMOS Current Limit
Soft-Start Time
NMOS Switch Leakage
PMOS Switch Leakage
0.5 < VIN < VOUT - 0.5V, VEN = 0
0.01
1.2
1
μA
FOSC
DC
0.95
1.5
0
MHz
%
%
80
2.0
ILIMIT
TSS
NMOS Leakage
PMOS Leakage
TA = -40°C to +85°C
VIN = 3.3V, VOUT = 5V, COUT = 10μF
2.5
0.7
0.1
0.1
180
250
A
ms
μA
μA
mΩ
mΩ
5.0
5.0
NMOS On-Resistance NMOS Switch On-Resistance
PMOS On-Resistance PMOS Switch On-Resistance
VIN = 1.5 - (VOUT - 0.5),
ILOAD = 0mA to 1000mA
VIN = 1.5 - (VOUT - 0.5),
ILOAD = 0mA to 1000mA
ΔVOUT
Line Regulation
0.1
0.5
%
ΔVOUT
Load Regulation
%
VIN = 2.5V - 4.5V, ΔVIN = 1V,
dVIN/dt = ±0.2V/μs
VIN = 2.5V, ILOAD = 50mA to 500mA,
ΔVOUT(LINE_TRANSIENT)
Line Transient Response1
Load Transient Response1
-3
3
% VOUT
% VOUT
ΔVOUT(LOAD_TRANSIENT)
EN
-10
10
dILOAD/dt = ±0.5A/μs, CFF = 100pF
VEN(L)
VEN(H)
IEN
Logic Input Low Threshold for EN
Logic Input High Threshold for EN
Enable Input Low Current
0.6
1.0
V
V
VOUT = 3.3V
VOUT = 5.0V
VIN = VOUT = 5.5V
0.85
1.0
-1.0
μA
1. Specifications are guaranteed by design and characterization.
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DATA SHEET
AAT1218
High Current, 1.2MHz Synchronous Boost Converterr
Typical Characteristics
CIN = 22μF, COUT = 44μF; L = 2.2μH; TA = 25°C, unless otherwise noted.
AAT1218 ISD vs. Temperature
AAT1218 IQ vs. Temperature
(VOUT = 5.5V, Measured From VOUT
)
1
0.8
0.6
0.4
0.2
0
390
385
380
375
370
365
360
-40
-15
10
35
60
85
85
85
-40
-15
10
35
60
85
Temperature (°C)
Temperature (°C)
VEN(H) vs. Temperature
VEN(L) vs. Temperature
(VOUT = 5V)
(VOUT = 5.0V)
0.94
0.9
0.86
0.82
0.78
0.74
0.70
0.66
0.86
0.82
0.78
0.74
-40
-15
10
35
60
-40
-15
10
35
60
85
Temperature (°C)
Temperature (°C)
AAT1218 VFB vs. Temperature
Maximum Load Current vs. VIN
1.236
1.227
1.218
1.209
1.200
1.191
1.182
1.173
1.164
10000
1000
100
VOUT = 3.3V
VOUT = 5V
10
-40
-15
10
35
60
0.85
1.35
1.85
2.35
2.85
3.35
3.85
4.35
4.85
Temperature (°C)
Input Voltage (V)
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DATA SHEET
AAT1218
High Current, 1.2MHz Synchronous Boost Converterr
Typical Characteristics
CIN = 22μF, COUT = 44μF; L = 2.2μH; TA = 25°C, unless otherwise noted.
Maximum Load Current at Startup vs. VIN
AAT1218 3.3V Output Efficiency
10000
1000
100
100
90
80
70
60
50
40
30
20
10
0
VIN = 1.2V
VIN = 1.5V
VIN = 1.8V
VOUT = 3.3V
VOUT = 5V
VIN = 2.4V
10
0.85
1.35
1.85
2.35
2.85
3.35
3.85
4.35
4.85
0.1
1
10
100
1000
ILOAD (mA)
Input Voltage (V)
AAT1218 5.0V Output Efficiency
AAT1218 5.0V Output Efficiency
100
90
80
70
60
50
40
30
20
10
100
90
80
70
60
50
40
30
20
10
0
VIN = 3.0V
VIN = 3.3V
VIN = 3.6V
VIN = 1.2V
VIN = 1.5V
VIN = 2.4V
VIN = 4.2V
0
0.1
1
10
100
1000
0.1
1
10
100
1000
10000
ILOAD (mA)
ILOAD (mA)
Load Transient
Soft Start Waveform
(VIN = 2.0V; VOUT = 3.3V; COUT = 44µF; CFF = 100pF)
(VIN = 1.5V; VOUT = 5V; Load = 100mA)
LX
(4V/div)
0
0
3.3V
VOUT
VOUT
(4V/div)
(200mV/div)
500mA
ILOAD
(0.25A/div)
IIN
(0.5A/div)
0
50mA
VEN
(1V/div)
0
Time (100µs/div)
Time (200µs/div)
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DATA SHEET
AAT1218
High Current, 1.2MHz Synchronous Boost Converterr
Typical Characteristics
VIN = 3.6V, VOUT = 3.6V, CIN = 22μF, COUT = 44μF; L = 2.2μH; TA = 25°C, unless otherwise noted.
Anti-Ringing Operation
Power Saving Mode Waveform
(VIN = 3V; VOUT = 5V; Load = 10mA)
(VIN = 3.6V; VOUT = 5V; Load = 5mA)
IL
(250mA/div)
VIN
VOUT
(AC Coupled)
(20mV/div)
0
0
0
(AC Coupled)
(20mV/div)
VOUT
0
0
(AC Coupled)
(20mV/div)
LX
(2V/div)
LX
(2V/div)
0
Time (0.2µs/div)
Time (4µs/div)
PWM Mode Waveform
(VIN = 3.6V; VOUT = 5V; Load = 1A)
IL
(1A/div)
0
0
VIN
(AC Coupled)
(20mV/div)
VOUT
0
(AC Coupled)
(20mV/div)
LX
(2V/div)
0
Time (0.4µs/div)
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DATA SHEET
AAT1218
High Current, 1.2MHz Synchronous Boost Converterr
Functional Block Diagram
Soft Start
+
VIN 1.4V–5.5V
VIN
Start-Up
V
OUT
Oscillator
GOOD
2.3V
Slope
Vss
–
MUX
Compensation
Start-Up
Current Limit
–
L1
LX
VOUT
OUT
Current
Sense
CIN
COUT
R1
Antiringing
Control
To VIN
Bandgap
1.2V
R2
PWM
Logic
+
–
Comp
+
–
EA
FB
EN
PGND
GND
Enable Logic
Shutdown
Control
Oscillator
1.2MHz
SHUTDOWN
diode. It is implemented by a PMOS driven by a gate
driver with break-before-make timing. When the output
voltage is greater than 4.5V, an external rectifier diode
is necessary for proper operation.
Functional Description
The AAT1218 is a synchronous step-up DC-DC converter.
It utilizes internal MOSFETs to achieve high efficiency
over the full load current range. It operates at a fixed
switching frequency of 1.2MHz, and uses the slope com-
pensated current mode architecture. The device can
operate at 0.5V input after start up. The typical start-up
voltage is 0.85V.
Low Voltage Start-Up
The AAT1218 can start up at supply voltages as low as
1V. During the start-up phase, the internal low voltage
start-up circuitry controls the NMOS switch to soft-start
the device. A comparator (VOUT GOOD Comp) monitors
the output voltage. If VOUT exceeds 2.3V, the device exits
start-up phase and enters normal operation mode. The
internal circuitry power supply of the device is connected
to VIN during start-up phase and automatically switches
to VOUT during normal operation.
Synchronous Rectification
The AAT1218 integrates a synchronous rectifier to
improve efficiency and eliminate the external rectifier
diode if output voltage is lower than 4.5V. The synchro-
nous rectifier is used to reduce conduction loss contrib-
uted by the forward voltage of the external rectifier
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DATA SHEET
AAT1218
High Current, 1.2MHz Synchronous Boost Converterr
Integrated Soft-Start
Application Information
During start-up, the AAT1218's integrated soft-start cir-
cuitry gradually increases the peak inductor current until
it reaches normal operating value. The inrush current
during start-up can thus be minimized.
Setting the Output Voltage
An external resistor divider is used to set the output volt-
age. The output voltage of the switching regulator (VOUT
is determined by the following equation:
)
Current Mode PWM Control
R1
The AAT1218 is based on a slope compensated current
mode control topology. It operates at a fixed frequency
of 1.2MHz. At the beginning of each clock cycle, the main
switch (NMOS) is turned on and the inductor current
starts to ramp up. After the maximum duty cycle or if the
sense current signal is equal to the error amplifier (EA)
output, the main switch is turned off and the synchro-
nous switch (PMOS) is turned on. This control scheme
has intrinsic cycle-by-cycle current limiting, which can
prevent the main switch from overstress and prevent
saturation of the external inductor.
⎛
⎞
⎠
VOUT = 1.20V · 1 +
R2
⎝
VOUT
R1 (Ω)
R2 (Ω)
3.3V
5.0V
1.02M
1.02M
576k
324k
Table 1: Resistor Selection Example for Output
Voltage Setting.
Fixed output voltage devices are also available for 3.3V
and 5V outputs. These devices integrate the feedback
network into the die and can save two external resistors.
Do not connect any component to the FB pin and leave
it floating.
Power Saving Mode
At very light load, the AAT1218 automatically switches
into Power Saving Mode to improve efficiency. In this
mode, the PWM control will skip some pulses to maintain
regulation. If load increases and output voltage drops,
the device will automatically switch back to regular PWM
mode and maintain regulation.
Inductor Selection
The AAT1218's high switching frequency of 1.2MHz
allows for small surface mount inductors. For most
designs, the AAT1218 operates with inductors of 2.2μH
to 10μH depending on input/output voltage and load cur-
Anti-ringing Control
Anti-ringing circuitry is included to remove the high fre-
quency ringing that appears on the LX pin when the
inductor current decreases to zero. In this case, ringing
on the LX pin is caused by energy stored in parasitics of
the MOSFETs and the inductor. The anti-ringing circuitry
clamps the voltage to battery voltage internally and thus
dampens the ringing.
rent. First determine the worst case VIN, VOUT, and IOUT
.
Then use the equation below to select the proper induc-
tor value; assume the converter is operating in continu-
ous current mode and is in steady state:
VIN
D = 1 -
VOUT
Device Enable
ΔI
2
IPEAK = IRMS
+
When EN is set logic high, the AAT1218 begins operation.
If EN is set logic low, the device is goes into shutdown
mode and consumes less than 1μA current. After start-
up, the internal circuitry is supplied by VOUT during normal
operation. However, if shutdown mode is enabled, the
internal circuitry will again be supplied by the battery.
VIN · D
L · fSW
ΔI =
η is the converter efficiency, IPEAK is the peak inductor
current, ΔI is the peak-peak inductor ripple current, IRMS
is the RMS current of the inductor current. fsw is the
switching frequency, L is the inductance value and D is
the steady state duty cycle.
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DATA SHEET
AAT1218
High Current, 1.2MHz Synchronous Boost Converterr
Fit the proper L into the equations to meet the following
criteria:
Output Capacitor
The output capacitor limits the output ripple and pro-
vides holdup during large load transitions. When choos-
ing the output capacitor, first consider the acceptable
output ripple level (ΔVtoatal) and solve for COUT from the
equations below; assume that output current remains
constant in steady state:
1. The DC current rating of the inductor must be high-
er than IPEAK to avoid magnetic saturation. Cored
inductor devalues when core temperature increases,
so verify the inductor of choice with its temperature
characteristics in mind.
2. The inductor ripple current ΔI is typically set for
20% to 40% of the peak inductor current.
ΔVTOTAL = ΔV + ΔVESR = ΔV + IOUT · RESR
Higher inductance means less inductor ripple current;
larger size inductors can handle more power. However,
larger size inductors also have higher profiles and are
more expensive. For optimum load transient and effi-
ciency performance, low DCR inductors should be select-
ed. Table 2 lists some surface mount inductors which are
suitable for typical AAT1218 applications.
I
OUT · D
ΔV =
C
OUT · FSW
A 10ꢀF to 47ꢀF X5R or X7R ceramic capacitor typically
provides sufficient bulk capacitance to stabilize the out-
put during large load transitions and has the ESR and
ESL characteristics necessary for low output ripple.
In addition, the output voltage droop during load tran-
sient is related to the capacitance of the ceramic output
capacitor. A larger output capacitor helps to reduce volt-
age droop.
Input Capacitor
Select a 4.7ꢀF to 10ꢀF X7R or X5R ceramic capacitor for
the input. The input capacitor provides a low impedance
loop for the edges of pulsed current drawn by the
AAT1218. Low ESR/ESL X7R and X5R ceramic capaci-
tors are ideal for this function. To minimize stray induc-
tance, the capacitor should be placed as close as pos-
sible to the IC. This keeps the high frequency content of
the input current localized, minimizing EMI and input
voltage ripple.
Rectifier Diode Selection
A rectifier diode must be added (D1 in Figure 1) when the
output voltage is greater than 4.5V. The Schottky diode
is optional for output voltages less than 4.5V, but can
improve efficiency by about 2% to 3%. A low forward
voltage Schottky diode is recommended. Its voltage rat-
ing should be higher than the output voltage. Thus,
diodes with 10V or more reverse voltage are recom-
mended. The diode rated current can be slightly less than
the peak inductor current to save cost and board space.
Always examine the ceramic capacitor DC voltage coef-
ficient characteristics to derive the proper value. For
example, the capacitance of a 10ꢀF, 6.3V, X5R ceramic
capacitor with 5.0V DC applied is actually about 6ꢀF.
L
Max DCR
(mΩ)
Rated DC Current
(A)
Size
WxLxH (mm)
Manufacturer
Part Number
(μH)
2.2
3.3
4.7
2.2
3.3
5.0
2.2
3.5
4.7
2.0
3.3
5.1
94
1.50
1.2
1.0
3.84
3.20
2.60
3.2
2.5
2.2
3.2
2.6
2D14
125
169
23.4
28.6
44.2
44.3
65.1
82.6
57
3.2x3.2x1.55
5.6x6.1x4.85
5.0x5.0x2.4
6.0x6.3x1.5
CR54
Sumida
CDRH4D22/HP
CDRH5D14/HP
96
140
2.0
Table 2: AAT1218 Typical Surface Mount Inductors.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
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DATA SHEET
AAT1218
High Current, 1.2MHz Synchronous Boost Converterr
node is involved. First, the inductor and input and output
capacitors should be placed close to the IC. Feedback
Load Disconnect in Shutdown
In a conventional synchronous step-up converter, a con-
duction path exists from battery to output through the
body diode of the PMOS during shutdown. To avoid out-
put side circuitry drawing current from VIN, special appli-
cation circuitry such as that shown in Figure 1 is neces-
sary to disconnect the output from VIN during shutdown.
and shutdown traces should avoid proximity to large AC
signals, e.g. the power inductor and switching nodes.
The optional rectifier diode (D1 in Figure 1 and Figure 2)
can improve efficiency and alleviate the stress on the
integrated PMOS device. The diode should also be close
to the inductor and the chip to form the shortest possible
switching loop. While the two layer PCB shown in Figures
3 and 4 is sufficient for low to moderate power applica-
tions, large and integral multi-layer ground planes are
ideal for high power applications since the large area of
copper has lower resistance and higher thermal dissipa-
tion capability. The converter’s grounds should join at
one point only. Figure 1 illustrates the schematic for a
typical AAT1218 application.
PCB Layout Guidance
The AAT1218 typically operates at 1.2MHz. Since this is
a high frequency for DC-DC converters, PCB layout is
critical to guarantee satisfactory performance. It is rec-
ommended to make traces of the power loop as short
and wide as possible, especially where the switching
L1 2.2μH
D1 (Optional)
VOUT
VOUT
LX
Q1 Si2305DS
R4
3.3V
VIN
R1
1.02MΩ
COUT2
2.2μF
AAT1218
510kΩ
CIN
22μF
COUT1
22μF
EN
FB
R2
576kΩ
PGND GND
Q2
2N3904
R3 510kΩ
ON/OFF Control
Figure 1: AAT1218 Application Schematic with Load Disconnect Circuit.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
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DATA SHEET
AAT1218
High Current, 1.2MHz Synchronous Boost Converterr
Evaluation Board Schematic
LX
VOUT
VOUT
D1
PGND
C3
B230LA
22μF
U1
AAT1218-TDFN33-12
C4
100pF
Opt.
C2
22μF
L1 2.2μH
LX
1
12
LX
PGND
PGND
OUT
OUT
FB
VIN
2
3
11
10
N/C
VIN
EN
VIN
EN
R2
4
5
6
9
.
C1
R3
1M
8
7
R1
1.02M
N/C
GND
22μF
FB
576K VOUT = 3.3V
470K VOUT = 3.8V
324K VOUT = 5V
GND
EXP PAD
PGND
JP2
3
2
1
PGND
ENABLE
R10
0R
GND
GND
GND
PGND
Figure 2: AAT1218 Evaluation Board Schematic.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
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DATA SHEET
AAT1218
High Current, 1.2MHz Synchronous Boost Converterr
Evaluation Board Layout
Figure 3: AAT1218 Evaluation Board
Top Side Layout.
Figure 4: AAT1218 Evaluation Board
Bottom Side Layout.
Designator
Description
Footprint
Comment
C1
C2
C3
C4
D1
JP2
L1
R1
R2
R3
R10
U1
Capacitor, Ceramic, Murata, GRM21BR60J226ME39, X5R, 22μF, ±20%, 6.3V
Capacitor, Ceramic, Murata, GRM21BR60J226ME39, X5R, 22μF, ±20%, 6.3V
Capacitor, Ceramic, Murata, GRM21BR60J226ME39, X5R, 22μF, ±20%, 6.3V
Capacitor, Ceramic, Murata, GRM1885C1H101JA01B, C0G, 100pF, ±5%, 50V
Schottky Diode, Vishay, B230LA
0805
0805
0805
0603
Diode
22μF
22μF
22μF
100pF
Header, 3-Pin
Inductor, Sumida
Chip Resistor, Panasonic, 1.02M, 1/16W, 1%
Chip Resistor, Panasonic, 590K, 1/16W, 1%
Chip Resistor, Panasonic, 1M, 1/16W, 5%
SMALLHDR1X3
CDRH4D28
0603
2.2μH
1.02M
590K
1M
0R
0603
0603
0603
Chip Resistor, Panasonic, 0R, 1/16W, 5%
AAT1218-TDFN33-12, AnalogicTech
TDFN33-12
Boost Reg.
Table 3: AAT1218 Evaluation Board Bill of Materials.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
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DATA SHEET
AAT1218
High Current, 1.2MHz Synchronous Boost Converterr
Ordering Information
Description
Package
Marking1
Part Number (Tape and Reel)2
Adjustable Output Voltage
Fixed 3.3V Output Voltage
Fixed 5V Output Voltage
TDFN33-12
TDFN33-12
TDFN33-12
2EXYY
5PXYY
5RXYY
AAT1218IWP-1.2-T1
AAT1218IWP-3.3-T1
AAT1218IWP-5.0-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
Detail "A"
0.40 0.05
0.1 REF
C0.3
Pin 1 Indicator
(optional)
3.00 0.05
1.70 0.05
Top View
Bottom View
Detail "A"
0.05 0.05
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.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
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DATA SHEET
AAT1218
High Current, 1.2MHz Synchronous Boost Converterr
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. Sky-
works 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
responsibility whatsoever for conflicts, incompatibilities, or other difficulties arising from any future changes.
No license, whether express, implied, by estoppel or otherwise, is granted to any intellectual property rights by this document. Skyworks assumes no liability for any materials, products or information provided here-
under, including the sale, distribution, reproduction or use of Skyworks products, information or materials, except as may be provided in Skyworks Terms and Conditions of Sale.
THE MATERIALS, PRODUCTS AND INFORMATION ARE PROVIDED “AS IS” WITHOUT WARRANTY OF ANY KIND, WHETHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, INCLUDING FITNESS FOR A PARTICULAR
PURPOSE OR USE, MERCHANTABILITY, PERFORMANCE, QUALITY OR NON-INFRINGEMENT OF ANY INTELLECTUAL PROPERTY RIGHT; ALL SUCH WARRANTIES ARE HEREBY EXPRESSLY DISCLAIMED. SKYWORKS DOES
NOT WARRANT THE ACCURACY OR COMPLETENESS OF THE INFORMATION, TEXT, GRAPHICS OR OTHER ITEMS CONTAINED WITHIN THESE MATERIALS. SKYWORKS SHALL NOT BE LIABLE FOR ANY DAMAGES, IN-
CLUDING BUT NOT LIMITED TO ANY SPECIAL, INDIRECT, INCIDENTAL, STATUTORY, OR CONSEQUENTIAL DAMAGES, INCLUDING WITHOUT LIMITATION, LOST REVENUES OR LOST PROFITS THAT MAY RESULT FROM
THE USE OF THE MATERIALS OR INFORMATION, WHETHER OR NOT THE RECIPIENT OF MATERIALS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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Customers are responsible for their products and applications using Skyworks products, which may deviate from published specifications as a result of design defects, errors, or operation of products outside of pub-
lished parameters or design specifications. Customers should include design and operating safeguards to minimize these and other risks. Skyworks assumes no liability for applications assistance, customer product
design, or damage to any equipment resulting from the use of Skyworks products outside of stated published specifications or parameters.
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
identification purposes only, and are the property of their respective owners. Additional information, including relevant terms and conditions, posted at www.skyworksinc.com, are incorporated by reference.
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