Analogic AAT1150IKS-3.3-T1 1mhz 1a step-down dc/dc converter Datasheet

AAT1150
1MHz 1A Step-Down DC/DC Converter
General Description
Features
The AAT1150 SwitchReg™ is a step-down switching converter ideal for applications where high efficiency, small size, and low ripple are critical. Able
to deliver 1A with internal power MOSFETs, the
current-mode controlled IC provides high efficiency
using synchronous rectification. Fully internally
compensated, the AAT1150 simplifies system
design and lowers external parts count.
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
The AAT1150 is available in a Pb-free MSOP-8
package and is rated over the -40°C to +85°C temperature range.
SwitchReg™
VIN Range: 2.7V to 5.5V
Up to 95% Efficiency
110mΩ RDS(ON) MOSFET Switch
<1.0μA of Shutdown Current
1MHz Switching Frequency
Fixed or Adjustable VOUT: 1.0V to 4.2V
High Initial Accuracy: ±1%
1.0A Peak Current
Integrated Power Switches
Synchronous Rectification
Internally Compensated Current Mode Control
Constant PWM Mode for Low Output Ripple
Internal Soft Start
Current Limit Protection
Over-Temperature Protection
MSOP-8 package
-40°C to +85°C Temperature Range
Applications
•
•
•
•
•
Cable/DSL Modems
Computer Peripherals
High Efficiency Conversion From 5V or 3.3V
Supply
Network Cards
Set-Top Boxes
Typical Application
INPUT
VP
10μF
FB
AAT1150
4.1μH
LX
ENABLE
100Ω
VCC
OUTPUT
SGND
PGND
3x 22μF
0.1μF
1150.2006.09.1.5
1
AAT1150
1MHz 1A Step-Down DC/DC Converter
Pin Descriptions
Pin #
Symbol
Function
1
FB
2
SGND
3
EN
4
VCC
5
VP
Input supply voltage for converter power stage.
6, 7
LX
Inductor connection pins. These pins should be connected to the output
inductor. Internally, Pins 6 and 7 are connected to the drains of the P-channel switch and N-channel synchronous rectifier.
8
PGND
Feedback input pin. This pin must be connected to the converter’s output. It is
used to set the output of the converter to regulate to the desired value.
Signal ground.
Enable input pin. When connected high, the AAT1150 is in normal operation.
When connected low, it is powered down. This pin should not be left floating.
Power supply. It supplies power for the internal circuitry.
Power ground return for the output stage.
Pin Configuration
MSOP-8
(Top View)
PGND
7
LX
3
6
LX
4
5
VP
SGND
2
EN
VCC
2
1
1
2
8
FB
1150.2006.09.1.5
AAT1150
1MHz 1A Step-Down DC/DC Converter
Absolute Maximum Ratings1
TA = 25°C, unless otherwise noted.
Symbol
VCC, VP
VLX
VFB
VEN
TJ
VESD
Description
VCC, VP to GND
LX to GND
FB to GND
EN to GND
Operating Junction Temperature Range
ESD Rating2 - HBM
Value
Units
6
-0.3 to VP + 0.3
-0.3 to VCC + 0.3
-0.3 to 6
-40 to 150
3000
V
V
V
V
°C
V
Value
Units
150
667
°C/W
mW
Rating
Units
-40 to +85
°C
Thermal Characteristics3
Symbol
ΘJA
PD
Description
Maximum Thermal Resistance (MSOP-8)
Maximum Power Dissipation (MSOP-8, TA = 25°C)4
Recommended Operating Conditions
Symbol
T
Description
Ambient Temperature Range
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. Human body model is a 100pF capacitor discharged through a 1.5kΩ resistor into each pin.
3. Mounted on a demo board.
4. Derate 6.7mW/°C above 25°C.
1150.2006.09.1.5
3
AAT1150
1MHz 1A Step-Down DC/DC Converter
Electrical Characteristics
VIN = VCC = VP = 5V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = 25°C.
Symbol
VIN
VOUT
Description
Input Voltage Range
Output Voltage Tolerance
ΔVOUT (VOUT*ΔVIN) Load Regulation
ΔVOUT/VOUT
Line Regulation
VUVLO
VUVLO(HYS)
IQ
ISHDN
ILIM
RDS(ON)H
RDS(ON)L
η
VEN(L)
VEN(H)
IEN
FOSC
TSD
THYS
4
Conditions
Under-Voltage Lockout
Under-Voltage Lockout Hysteresis
Quiescent Supply Current
Shutdown Current
Current Limit
High Side Switch On Resistance
Low Side Switch On Resistance
Efficiency
Enable Low Voltage
Enable High Voltage
Enable Pin Leakage Current
Oscillator Frequency
Over-Temperature Shutdown
Threshold
Over-Temperature Shutdown
Hysteresis
VIN = VOUT + 0.3 to 5.5V,
IOUT = 0 to 1A
VIN = 4.2V, ILOAD = 0 to 1A
VIN = 2.7V to 5.5V
VIN Rising
VIN Falling
No Load, VFB = 0
VEN = 0V, VIN = 5.5V
TA = 25°C
TA = 25°C
TA = 25°C
VIN = 5V, VOUT = 3.3V,
IOUT = 600mA
VIN = 2.7V to 5.5V
VIN = 2.7V to 5.5V
VEN = 5.5V
TA = 25°C
Min
Typ
Max
Units
2.7
5.5
V
-4.0
4.0
%
3.0
0.2
%
%/V
2.5
1.2
250
160
300
1.0
1.2
110
100
150
150
93
0.6
1000
mV
μA
μA
A
mΩ
mΩ
%
1.4
700
V
1.0
1200
V
V
μA
kHz
140
°C
15
°C
1150.2006.09.1.5
AAT1150
1MHz 1A Step-Down DC/DC Converter
Typical Characteristics
Efficiency vs. Output Current
Efficiency vs. Output Current
(VOUT = 1.5V)
(VOUT = 3.3V)
100
100
60
4.2V
40
VIN = 5.0V
80
Efficiency (%)
Efficiency (%)
90
2.7V
80
3.6V
20
70
60
50
40
30
20
10
0
0
10
100
1000
10
100
Output Current (mA)
Output Current (mA)
Low Side RDS(ON) vs. Temperature
High Side RDS(ON) vs. Temperature
170
170
3.6V
150
150
RDS(ON) (mΩ)
RDS(ON) (mΩ)
2.7V
130
110
5.5V
4.2V
90
70
-20
0
20
40
130
3.6V
2.7V
110
5.5V
90
60
80
100
4.2V
70
-20
120
0
20
40
60
80
100
120
Temperature (°C)
Temperature (°C)
Enable Threshold vs. Input Voltage
RDS(ON) vs. Input Voltage
1.2
130
Enable Threshold (V)
120
High Side
RDS(ON) (mΩ)
1000
110
100
Low Side
90
80
1.1
VEN(H)
1
0.9
VEN(L)
0.8
0.7
2.5
3
3.5
4
4.5
Input Voltage (V)
1150.2006.09.1.5
5
5.5
2.5
3
3.5
4
4.5
5
5.5
Input Voltage (V)
5
AAT1150
1MHz 1A Step-Down DC/DC Converter
Typical Characteristics
Oscillator Frequency Variation vs. Temperature
(VIN = 3.6V)
3.5
10
2.5
6
Variation (%)
Variation (%)
Oscillator Frequency Variation vs.
Supply Voltage
1.5
0.5
-0.5
2
-2
-6
-1.5
2.5
3
3.5
4
4.5
5
-10
-20
5.5
0
20
Supply Voltage (V)
0.6
0.15
Accuracy (%)
Output Voltage Error (%)
0.25
VIN = 2.7V
VIN = 3.6V
-0.6
IOUT = 1.0A
0.05
IOUT = 0.4A
-0.05
-0.15
-0.25
0
20
40
60
80
2.5
100
3
3.5
4
4.5
5
5.5
Input Voltage (V)
Temperature (°C)
Load Regulation
Load Regulation
(VOUT = 3.3V; VIN = 5.0V)
(VOUT = 1.5V; VIN = 3.6V)
0
0
-1
-1
VOUT Error (%)
Error (%)
100
(VOUT = 1.5V)
1.0
-1.0
-20
80
Line Regulation
(IOUT = 900mA; VOUT = 1.5V)
-0.2
60
Temperature (°C)
Output Voltage vs. Temperature
0.2
40
-2
-3
-4
-2
-3
-4
-5
-5
0
0
150
300
450
IOUT (mA)
6
600
750
900
150
300
450
600
750
900
1050
Output Current (mA)
1150.2006.09.1.5
AAT1150
1MHz 1A Step-Down DC/DC Converter
Typical Characteristics
Efficiency vs. Input Voltage
AAT1150 Loop Gain and Phase
(CO = 22μ
μF; VO = 1.5V; VIN = 3.6V; IO = 1A)
(VOUT = 1.5V)
100
IO = 1A
200
160
12
Gain (dB)
IO = 0.4A
80
70
40
0
0
-4
Gain
-8
2.5
3
3.5
4
4.5
5
VCC = 5.0V
Operating Current (μA)
Input Current (mA)
(FB = 0V; VP = VCC)
VCC = 5.5V
10
8
6
VCC = 3.6V
VCC = 2.7V
2
0
200
190
180
VCC = 5.5V
VCC = 5.0V
170
160
150
140
130
VCC = 4.2V
VCC = 2.7V
120
110
100
-20
-20
-5
10
25
40
55
70
-5
85
10
25
VCC = 3.6V
40
55
70
85
Temperature (°C)
Temperature (°C)
Switching Waveform
Transient Response
(VIN = 3.6V; VOUT = 1.5V; IOUT = 1.2A)
(VIN = 3.6V; VOUT = 1.5V; ILOAD = 0.25 to 1.2A)
VOUT
50mV/div
V(LX)
2V/div
Inductor Current
500mA/div
IL
500mA/div
Time (500ns/div)
1150.2006.09.1.5
-200
1000
Non-Switching IQ vs. Temperature
(VCC = VP)
VCC = 4.2V
-160
Frequency (kHz)
No Load Input Current vs. Temperature
4
-120
100
Input Voltage (V)
12
-80
5 x 22μF
-20
10
5.5
-40
3 x 22μF
4 x 22μF
-16
50
80
4
-12
60
120
Phase
8
Phase (degrees)
90
Efficiency (%)
20
16
Time (20µs/div)
7
AAT1150
1MHz 1A Step-Down DC/DC Converter
Typical Characteristics
Output Ripple
Output Ripple
(VIN = 3.6V; VOUT = 1.5V; IOUT = 1A)
(VIN = 3.6V; VOUT = 1.5V; IOUT = 0A)
VOUT
5mV/div
BW = 20MHz
VOUT
5mV/div
BW = 20MHz
LX
2V/div
LX
2V/div
Time (500ns/div)
Time (500ns/div)
Output Ripple
Output Ripple
(VIN = 5.0V; VOUT = 3.3V; IOUT = 1A)
(VIN = 5.0V; VOUT = 3.3V; IOUT = 0A)
VOUT
5mV/div
BW = 20MHz
VOUT
5mV/div
BW = 20MHz
LX
2V/div
LX
2V/div
Time (500nsec/div)
Time (500ns/div)
Inrush Limit
(VIN = 3.6V; VOUT = 1.5V; IL = 1A)
Enable
2V/div
VOUT
1V/div
IL
0.5A/div
Time (200µs/div)
8
1150.2006.09.1.5
AAT1150
1MHz 1A Step-Down DC/DC Converter
Functional Block Diagram
VCC
VP = 2.7V- 5.5V
1.0V REF
FB
OP. AMP
CMP
DH
LOGIC
1MΩ
LX
DL
Temp.
Sensing
OSC
SGND
Applications Information
Control Loop
The AAT1150 is a peak current mode buck converter. The inner wide bandwidth loop controls the
peak current of the output inductor. The output
inductor current is sensed through the P-channel
MOSFET (high side) and is also used for short-circuit and overload protection. A fixed slope compensation signal is added to the sensed current to
maintain stability. The loop appears as a voltageprogrammed current source in parallel with the output capacitor.
The voltage error amplifier output programs the
current loop for the necessary inductor current to
force a constant output voltage for all load and line
conditions. The feedback resistive divider is inter-
1150.2006.09.1.5
EN
PGND
nal, dividing the output voltage to the error amplifier reference voltage of 1.0V. The error amplifier
does not have a large DC gain typical of most error
amplifiers. This eliminates the need for external
compensation components while still providing sufficient DC loop gain for load regulation. The
crossover frequency and phase margin are set by
the output capacitor value only.
Soft Start/Enable
Soft start increases the inductor current limit point in
discrete steps when the input voltage or enable
input is applied. It limits the current surge seen at the
input and eliminates output voltage overshoot. The
enable input, when pulled low, forces the AAT1150
into a low power, non-switching state. The total input
current during shutdown is less than 1μA.
9
AAT1150
1MHz 1A Step-Down DC/DC Converter
Power and Signal Source
Separate small signal ground and power supply
pins isolate the internal control circuitry from the
noise associated with the output MOSFET switching. The low pass filter R1 and C3 in schematic
Figures 1 and 2 filters the noise associated with the
power switching.
Current Limit and Over-Temperature
Protection
For overload conditions, the peak input current is limited. Figure 3 displays the current limit characteristics. As load impedance decreases and the output
voltage falls closer to zero, more power is dissipated
internally, raising the device temperature. Thermal
protection completely disables switching when internal dissipation becomes excessive, protecting the
device from damage. The junction over-temperature
threshold is 140°C with 15°C of hysteresis.
Efficiency vs. Output Current
AAT1150-1.5
R1 100
R2
C1
10μF
100k
C7
0.1μF
VP
FB
VCC
LX
EN
LX
(VOUT = 1.5V)
V OUT 1.5V 1A
L1
4.1μH
SGND PGND
100
2.7V
80
C2, C3, C4
3x 22μF
6.3V
RTN
Efficiency (%)
2.7V-5.5V
C1 Murata 10μF 6.3V X5R GRM42-6X 5R106K6.3
C2, C3, C4 MuRata 22μF 6.3V GRM21BR60J226ME39L 0805 X5R
L1 Sumida CDRH5D18-4R1μH
60
4.2V
40
3.6V
20
0
10
100
1000
Output Current (mA)
Figure 1: Lithium-Ion to 1.5V Converter.
Efficiency vs. Output Current
(VOUT = 3.3V)
AAT1150-3.3
R1 100
R2
C1
10μF
100k
C7
0.1μF
VP
FB
VCC
LX
EN
LX
SGND PGND
V OUT 3.3V 1A
100
90
VIN = 5.0V
80
L1
4.1μH
C2, C3, C4
3x 22μF
6.3V
RTN
C1 Murata 10μF 6.3V X5R GRM42-6X 5R106K6.3
C2, C3, C4 MuRata 22μF 6.3V GRM21BR60J226ME39L X5R 0805
L1 Sumida CDRH5D18-4R1μH
Efficiency (%)
3.5V-5.5V
70
60
50
40
30
20
10
0
10
100
1000
Output Current (mA)
Figure 2: 5V Input to 3.3V Output Converter.
10
1150.2006.09.1.5
AAT1150
1MHz 1A Step-Down DC/DC Converter
Output Voltage (V)
3.5
VCC = VP = 5.0V
VO = 3.3V
Figure 2 Schematic
3
2.5
2
1.5
VCC = VP = 3.6V
VO = 1.5V
Figure 1 Schematic
1
0.5
0
0
0.5
1
1.5
2
2.5
Output Current (A)
Figure 3: Current Limit Characteristics.
Inductor
The output inductor is selected to limit the ripple
current to some predetermined value, typically
20% to 40% of the full load current at the maximum
input voltage. Manufacturer's specifications list
both the inductor DC current rating, which is a thermal limitation, and the peak current rating, which is
determined by the saturation characteristics. The
inductor should not show any appreciable saturation under normal load conditions. During overload
and short-circuit conditions, the average current in
the inductor can meet or exceed the ILIMIT point of
the AAT1150 without affecting converter performance. Some inductors may have sufficient peak
and average current ratings yet result in excessive
losses due to a high DCR. Always consider the
losses associated with the DCR and its effect on
the total converter efficiency when selecting an
inductor.
For a 1.0A load and the ripple set to 30% at the
maximum input voltage, the maximum peak-topeak ripple current is 300mA. The inductance
value required is 3.9μH.
L=
⎛ V ⎞
VOUT
⋅ 1 - OUT
IO ⋅ k ⋅ FS ⎝
VIN ⎠
L=
1.5V
⎛ 1.5V ⎞
⋅11.0A ⋅ 0.3 ⋅ 830kHz ⎝ 4.2V⎠
The factor "k" is the fraction of full load selected for
the ripple current at the maximum input voltage.
The corresponding inductor RMS current is:
IRMS =
⎛ 2 ΔI2⎞
≈ Io = 1.0A
I +
⎝o
12⎠
ΔI is the peak-to-peak ripple current which is fixed by
the inductor selection above. For a peak-to-peak
current of 30% of the full load current, the peak current at full load will be 115% of the full load. The
4.1μH inductor selected from the Sumida
CDRH5D18 series has a 57mΩ DCR and a 1.95A
DC current rating. At full load, the inductor DC loss
is 57mW which amounts to a 3.8% loss in efficiency.
Input Capacitor
The primary function of the input capacitor is to provide a low impedance loop for the edges of pulsed
current drawn by the AAT1150. A low ESR/ESL
ceramic capacitor is ideal for this function. To minimize stray inductance, the capacitor should be
placed as closely as possible to the IC. This keeps
the high frequency content of the input current
localized, minimizing radiated and conducted EMI
while facilitating optimum performance of the
AAT1150. Ceramic X5R or X7R capacitors are
ideal for this function. The size required will vary
depending on the load, output voltage, and input
voltage source impedance characteristics. A typical value is around 10μF. The input capacitor RMS
L = 3.9μH
1150.2006.09.1.5
11
AAT1150
1MHz 1A Step-Down DC/DC Converter
current varies with the input voltage and the output
voltage. The equation for the RMS current in the
input capacitor is:
VO ⎛
VO ⎞
⋅ 1VIN ⎠
VIN ⎝
IRMS = IO ⋅
The input capacitor RMS ripple current reaches a
maximum when VIN is two times the output voltage
where it is approximately one half of the load current. Losses associated with the input ceramic
capacitor are typically minimal and are not an
issue. Proper placement of the input capacitor can
be seen in the reference design layout shown in
Figures 4 and 5.
Output Capacitor
Since there are no external compensation components, the output capacitor has a strong effect on
loop stability. Larger output capacitance will
reduce the crossover frequency with greater phase
margin. For the 1.5V 1.0A design using the 4.1μH
inductor, three 22μF 6.3V X5R capacitors provide a
stable output. In addition to assisting stability, the
output capacitor limits the output ripple and provides holdup during large load transitions.
The output capacitor RMS ripple current is given by:
IRMS =
1
2⋅
3
⋅
For applications requiring an output other than the
fixed outputs available, the 1V version can be programmed externally (see Figure 6). Resistors R3
and R4 force the output to regulate higher than
1V. R4 should be 100 times less than the internal
1mΩ resistance of the FB pin. Once R4 is selected,
R3 can be calculated. For a 1.25V output with R4
set to 10kΩ, R3 is 2.55kΩ.
R3 = (VO - 1) ⋅ R4 = 0.25 ⋅ 10.0kΩ = 2.55kΩ
Layout Considerations
Figures 4 and 5 display the suggested PCB layout
for the AAT1150. The most critical aspect of the layout is the placement of the input capacitor C1. For
proper operation, C1 must be placed as closely as
possible to the AAT1150.
Thermal Calculations
There are two types of losses associated with the
AAT1150 output switching MOSFET: switching
losses and conduction losses. Conduction losses
are associated with the RDS(ON) characteristics of
the output switching device. At full load, assuming
continuous conduction mode (CCM), a simplified
form of the total losses is:
VOUT ⋅ (VIN - VOUT)
L ⋅ FS ⋅ VIN
For a ceramic capacitor, the dissipation due to the
RMS current of the capacitor is not a concern.
Tantalum capacitors, with sufficiently low ESR to
meet output voltage ripple requirements, also have
an RMS current rating much greater than that actually seen in this application.
12
Adjustable Output
PLOSS =
IO2 ⋅ (RDS(ON)H ⋅ VO + RDS(ON)L ⋅ (VIN - VO))
VIN
+ tsw ⋅ FS ⋅ IO ⋅ VIN + IQ ⋅ VIN
Once the total losses have been determined, the
junction temperature can be derived from the ΘJA
for the MSOP-8 package.
1150.2006.09.1.5
AAT1150
1MHz 1A Step-Down DC/DC Converter
Figure 4: AAT1150 Evaluation
Board Layout Top Layer.
Figure 5: AAT1150 Evaluation
Board Layout Bottom Layer.
AAT1150-1.0
VIN+ 3.3V
VP
R1 100
R2
C1
10μF
100k
C7
0.1μF
EN
R3
2.55k 1% V O + 1.25V 1A
FB
R4
10k 1%
VCC
EN
LX
SGND PGND
LX
L1
2.7μH
C2, C3, C4
3x 22μF
6.3V
VC1 Murata 10μF 6.3V X5R GRM42-6X 5R106K6.3
C2, C3, C4 MuRata 22μF 6.3V GRM21BR60J226ME39L X5R 0805
L1 Sumida CDRH4D28-2R7μH
Figure 6: 3.3V to 1.25V Converter (Adjustable Output).
1150.2006.09.1.5
13
AAT1150
1MHz 1A Step-Down DC/DC Converter
Design Example
Specifications
= 1.0A
IOUT
IRIPPLE = 30% of Full Load at Max VIN
VOUT = 1.5V
VIN
= 2.7V to 4.2V (3.6V nominal)
Fs
= 830kHz
Maximum Input Capacitor Ripple
IRMS = IO ⋅
VO ⎛ VO ⎞ IO
⋅ 1=
= 0.5ARMS, VIN = 2 ⋅ VO
VIN ⎝ VIN⎠
2
P = ESRCOUT ⋅ IRMS2 = 5mΩ ⋅ 0.52 A = 1.25mW
Inductor Selection
L=
⎛
VOUT
V ⎞
1.5V
1.5V⎞
⎛
⋅ 1 - OUT =
⋅ 1= 3.9μH
IO ⋅ k ⋅ FS ⎝
VIN ⎠ 1.0A ⋅ 0.3 ⋅ 830kHz ⎝
4.2V⎠
Select Sumida inductor CDRH5D18, 4.1μH, 57mΩ, 2.0mm height.
ΔI =
⎛ 1.5V ⎞
VO
1.5V
⎛ V ⎞
⋅ 1- O =
⋅ 1= 280mA
4.1μH ⋅ 830kHz ⎝ 4.2V⎠
L ⋅ FS ⎝ VIN ⎠
IPK = IOUT +
ΔI
= 1.0A + 0.14A = 1.14A
2
P = IO2 ⋅ DCR = 57mW
Output Capacitor Dissipation
IRMS =
VOUT ⋅ (VIN - VOUT)
1.5V ⋅ (4.2V - 1.5V)
1
1
⋅
⋅
=
= 82mARMS
L ⋅ FS ⋅ VIN
2⋅ 3
2 ⋅ 3 4.1μH ⋅ 830kHz ⋅ 4.2V
PESR = ESRCOUT ⋅ IRMS2 = 5mΩ ⋅ 0.0822A = 33μW
14
1150.2006.09.1.5
AAT1150
1MHz 1A Step-Down DC/DC Converter
AAT1150 Dissipation
P=
=
IO2 ⋅ (RDS(ON)H ⋅ VO + RDS(ON)L ⋅ (VIN -VO))
VIN
(0.14Ω ⋅ 1.5V + 0.145Ω ⋅ (3.6V - 1.5V))
3.6V
+ (tsw ⋅ FS ⋅ IO + IQ) ⋅ VIN
+ (20nsec ⋅ 830kHz ⋅ 1.0A + 0.3mA) ⋅ 3.6V = 0.203W
TJ(MAX) = TAMB + ΘJA ⋅ PLOSS = 85°C + 150°C/W ⋅ 0.203W = 115°C
Manufacturer
Part Number
Value
Max DC
Current
DCR
TaiyoYuden
Toko
Sumida
Sumida
MuRata
MuRata
NPO5DB4R7M
A914BYW-3R5M-D52LC
CDRH5D28-4R2
CDRH5D18-4R1
LQH55DN4R7M03
LQH66SN4R7M03
4.7μH
3.5μH
4.2μH
4.1μH
4.7μH
4.7μH
1.4A
1.34A
2.2A
1.95A
2.7A
2.2A
0.038
0.073
0.031
0.057
0.041
0.025
Size (mm)
L×W×H
Type
5.9 × 6.1 × 2.8
Shielded
5.0 × 5.0 × 2.0
Shielded
5.7 × 5.7 × 3.0
Shielded
5.7 × 5.7 × 2.0
Shielded
5.0 × 5.0 × 4.7 Non-Shielded
6.3 × 6.3 × 4.7
Shielded
Table 1: Surface Mount Inductors.
Manufacturer
Part Number
MuRata
MuRata
MuRata
MuRata
GRM40 X5R 106K 6.3
GRM42-6 X5R 106K 6.3
GRM21BR60J226ME39L
GRM21BR60J106ME39L
Value
Voltage
Temp. Co.
Case
10μF
10μF
22μF
10μF
6.3V
6.3V
6.3V
6.3V
X5R
X5R
X5R
X5R
0805
1206
0805
0805
Table 2: Surface Mount Capacitors.
1150.2006.09.1.5
15
AAT1150
1MHz 1A Step-Down DC/DC Converter
Ordering Information
Output Voltage1
Package
Marking2
Part Number (Tape and Reel)3
1.0V (Adj VOUT ≥ 1.0V)
1.5V
1.8V
2.5V
3.3V
MSOP-8
MSOP-8
MSOP-8
MSOP-8
MSOP-8
JZXYY
HYXYY
KAXYY
KCXYY
HZXYY
AAT1150IKS-1.0-T1
AAT1150IKS-1.5-T1
AAT1150IKS-1.8-T1
AAT1150IKS-2.5-T1
AAT1150IKS-3.3-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
MSOP-8
4° ± 4°
4.90 ± 0.10
3.00 ± 0.10
1.95 BSC
0.95 REF
0.60 ± 0.20
PIN 1
3.00 ± 0.10
0.85 ± 0.10
0.95 ± 0.15
10° ± 5°
GAUGE PLANE
0.254 BSC
0.155 ± 0.075
0.075 ± 0.075
0.65 BSC
0.30 ± 0.08
All dimensions in millimeters.
1. Contact sales for custom voltage options.
2. XYY = assembly and date code.
3. Sample stock is held on part numbers listed in BOLD.
16
1150.2006.09.1.5
AAT1150
1MHz 1A Step-Down DC/DC Converter
© 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 subject 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
warrants performance of its semiconductor products to the specifications applicable at the time of sale in accordance with AnalogicTech’s standard warranty. Testing and other quality control 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 registered trademarks or trademarks of their respective holders.
Advanced Analogic Technologies, Inc.
830 E. Arques Avenue, Sunnyvale, CA 94085
Phone (408) 737-4600
Fax (408) 737-4611
1150.2006.09.1.5
17
Similar pages