AAT1156 [ANALOGICTECH]
1MHz 700mA Step-Down DC-DC Converter; 1MHz的700毫安降压型DC -DC转换器型号: | AAT1156 |
厂家: | ADVANCED ANALOGIC TECHNOLOGIES |
描述: | 1MHz 700mA Step-Down DC-DC Converter |
文件: | 总14页 (文件大小:425K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
AAT1156
1MHz 700mA Step-Down DC-DC Converter
™
SwitchReg
General Description
Features
The AAT1156 SwitchReg™ is a member of
AnalogicTech™'s Total Power Management IC™
(TPMIC™) product family. The step-down switching
converter is ideal for applications where high effi-
ciency is required over the full range of load condi-
tions. The 2.7V to 5.5V input voltage range makes
the AAT1156 ideal for single-cell lithium-ion/polymer
battery applications. Capable of more than 700mA
with internal MOSFETs, the current-mode con-
trolled IC provides high efficiency over a wide oper-
ating range. Fully integrated compensation simpli-
fies system design and lowers external parts count.
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
VIN Range: 2.7 to 5.5 Volts
Up to 95% Efficiency
110mΩ RDS(ON) Internal Switches
<1µA Shutdown Current
1MHz Step-Down Switching Frequency
Fixed or Adjustable VOUT ≥ 0.8V
Integrated Power Switches
Current Mode Operation
Internal Compensation
Stable with Ceramic Capacitors
Internal Soft Start
Over-Temperature Protection
Current Limit Protection
16-Pin QFN 3x3mm Package
-40°C to +85°C Temperature Range
The AAT1156 is available in the 16-pin 3x3mm
QFN package and is rated over the -40°C to +85°C
temperature range.
Applications
•
•
•
•
•
•
Cellular Phones
Digital Cameras
MP3 Players
Notebook Computers
PDAs
Wireless Notebook Adapters
Typical Application
AAT1156 Efficiency
(VOUT = 2.5V; L = 4.7µH; CDRH3D16)
U1
AAT1156
INPUT
2.5V
12
11
10
7
4
100
95
90
85
80
75
70
65
60
55
50
VP
VP
VP
EN
VCC
LL
FB
LX
R3
187k
15
14
13
16
3
R1
100
VIN = 3.0V
L1
4.7µH
LX
C1
10µF
VIN = 4.2V
VIN = 3.6V
LX
9
NC
R4
59k
C3, C4
2 x 22µF
6
PGND
PGND
C2
0.1 µF
8
2
NC
5
1
SGND PGND
1
10
100
1000
C1 Murata 10µF 6.3V X5R GRM42-6X5R106K6.3
C3-C4 MuRata 22µF 6.3V GRM21BR60J226ME39L X5R 0805
L1 Sumida CDRH3D16-4R7NC
Output Current (mA)
1156.2005.11.1.2
1
AAT1156
1MHz 700mA Step-Down DC-DC Converter
Pin Descriptions
Pin #
Symbol
Function
1, 2, 3
PGND
Main power ground return pin. Connect to the output and input capacitor
return. (See board layout rules.)
4
FB
Feedback input pin. This pin is connected to the converter output. It is
used to set the output of the converter to regulate to the desired value
via an internal resistive divider. For an adjustable output, an external
resistive divider is connected to this pin on the 1V model.
5
SGND
Signal ground. Connect the return of all small signal components to this
pin. (See board layout rules.)
6
7
LL
Mode selector switch. When pulled low, the device enters light load mode.
EN
Enable input pin. A logic high enables the converter; a logic low forces
the AAT1156 into shutdown mode, reducing the supply current to less
than 1µA. The pin should not be left floating.
8, 16
9
NC
Not internally connected.
VCC
Bias supply. Supplies power for the internal circuitry. Connect to input
power via low pass filter with decoupling to SGND.
10, 11, 12
13, 14, 15
EP
VP
LX
Input supply voltage for the converter power stage. Must be closely
decoupled to PGND.
Connect inductor to these pins. Switching node internally connected to
the drain of both high- and low-side MOSFETs.
Exposed paddle (bottom); connect to PGND directly beneath package.
Pin Configuration
QFN33-16
(Top View)
1
2
3
4
12
11
10
9
PGND
PGND
PGND
FB
VP
VP
VP
VCC
2
1156.2005.11.1.2
AAT1156
1MHz 700mA Step-Down DC-DC Converter
Absolute Maximum Ratings1
Symbol
Description
Value
Units
VCC, V
VLX
VCC, VP to GND
6
V
V
LX to GND
-0.3 to VP+0.3
-0.3 to VCC+0.3
-0.3 to 6
VFB
FB to GND
V
VEN
TJ
EN to GND
V
Operating Junction Temperature Range
ESD Rating2 - HBM
-40 to 150
3000
°C
V
VESD
Thermal Characteristics
Symbol
Description
Value
Units
ΘJA
PD
Maximum Thermal Resistance (QFN33-16)3
Maximum Power Dissipation (QFN33-16)4 (TA = 25°C)
50
°C/W
W
2.0
Recommended Operating Conditions
Symbol
Description
Value
Units
T
Ambient Temperature Range
-40 to 85
°C
1. Stresses above those listed in Absolute Maximum Ratings may cause 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 100pF capacitor discharged through a 1.5kΩ resistor into each pin.
3. Mounted on a demo board (FR4, in still air).
4. Derate 20mW/°C above 25°C.
1156.2005.11.1.2
3
AAT1156
1MHz 700mA 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
Description
Conditions
Min Typ Max Units
VIN
Input Voltage Range
2.7
-3
5.5
3
V
VOUT
Output Voltage Tolerance
VIN = VOUT + 0.2 to 5.5V,
IOUT = 0 to 700mA
%
VIL
VIH
Input Low Voltage
Input High Voltage
0.6
2.5
V
V
1.4
1.2
V
IN Rising, VEN = VCC
VUVLO
Under-Voltage Lockout
V
VIN Falling, VEN = VCC
VUVLO(HYS)
Under-Voltage Lockout Hysteresis
Input Low Current
250
220
mV
µA
µA
µA
IIL
IIH
IQ
VIN = VFB = 5.5V
VIN = VFB = 0V
1.0
1.0
Input High Current
Quiescent Supply Current
No Load, LL = 0V; VFB = 0V,
VIN = 4.2V, TA = 25°C
VEN = 0V, VIN = 5.5V
TA = 25°C
350
ISHDN
ILIM
RDS(ON)H
RDS(ON)L
Shutdown Current
1.0
µA
A
Current Limit
1.2
High Side Switch On Resistance
Low Side Switch On Resistance
TA = 25°C
110
100
±0.9
±0.1
150
150
mΩ
mΩ
%
TA = 25°C
∆VOUT(VOUT*∆VIN) Load Regulation
VIN = 4.2V, ILOAD = 0 to 700mA
VIN = 2.7 to 5.5V
TA = 25°C
DVOUT/VOUT
Line Regulation
%/V
kHz
°C
FOSC
Oscillator Frequency
Over-Temperature Shutdown
Threshold
750 1000 1350
140
TSD
THYS
Over-Temperature Shutdown
Hysteresis
15
°C
4
1156.2005.11.1.2
AAT1156
1MHz 700mA Step-Down DC-DC Converter
Typical Characteristics
Output Ripple
(0.8V; 10mA; VIN = 3.6V)
Soft Start
(0.8V; 700mA; VIN = 3.6V)
20
10
1.4
1.2
1
2
1.5
1
3.5
3
0
2.5
2
-10
-20
-30
-40
-50
-60
0.8
0.6
0.4
0.2
0
0.5
0
1.5
1
-0.5
-1
0.5
0
-1.5
-2
-0.2
-0.5
Time (2µs/div)
Time (100µs/div)
Output Ripple
(0.8V; 700mA; VIN = 3.6V)
Line Transient
(IOUT = 500mA; VO = 0.8V)
20
10
3.5
3
4.4
4.2
4
60
50
40
30
20
10
0
0
2.5
2
-10
-20
-30
-40
-50
-60
3.8
3.6
3.4
3.2
3
1.5
1
0.5
0
-10
-20
2.8
-0.5
Time (20µsec/div)
Time (250ns/div)
Load Transient Response
(50mA-680mA; VIN = 3.6V; VOUT = 0.8V)
No Load Supply Current vs. Input Voltage
300
0.83
0.81
0.79
0.77
0.75
0.73
85°C
-40°C
3
250
200
150
100
50
25°C
Ø
0.71
0.69
0.67
Ø
0
2.5
3.5
4
4.5
5
5.5
Time (10µsec/div)
Input Voltage (V)
1156.2005.11.1.2
5
AAT1156
1MHz 700mA Step-Down DC-DC Converter
Typical Characteristics
DC Regulation
(VOUT = 0.6V)
Output Voltage vs. Temperature
(VIN = 4.2V; VOUT = 0.8V; 400mA VOUT
)
0.1
0.0
3.0
2.0
1.0
VIN = 4.2V
-0.1
-0.2
-0.3
-0.4
0.0
VIN = 3.6V
-1.0
VIN = 2.7V
-2.0
-3.0
0.0001
-40
-20
0
20
40
60
80
100
0.001
0.01
0.1
1
Output Current (A)
Temperature (°C)
Frequency vs. Temperature
(VIN = 3.6V)
P-Channel RDSON vs. Input Voltage
200
1.2
1.1
1
180
160
140
120
100
80
100°C
120°C
0.9
0.8
0.7
0.6
85°C
25°C
60
40
20
0
2.5
3
3.5
4
4.5
5
5.5
-40
-20
0
20
40
60
80
100
Temperature (°°C)
Input Voltage (V)
Frequency vs. Input Voltage
N-Channel RDSON vs. Input Voltage
200
180
160
140
120
100
80
1.02
1.01
1
100°C
85°C
4
120°C
25°C
4.5
0.99
0.98
0.97
0.96
0.95
0.94
60
40
20
0
2.5
3
3.5
5
5.5
2.7
3.2
3.7
4.2
4.7
5.2
5.7
Input Voltage (V)
Input Voltage (V)
6
1156.2005.11.1.2
AAT1156
1MHz 700mA Step-Down DC-DC Converter
Functional Block Diagram
VCC
VP= 2.7V to 5.5V
1.0V REF
CMP
DH
OP. AMP
FB
LOGIC
LX
DL
1MΩ
OSC
Temp.
Sensing
SGND
EN
LL
PGND
still providing sufficient DC loop gain for good load
regulation. The voltage loop crossover frequency
and phase margin are set by the output capacitor.
Operation
Control Loop
The AAT1156 is a peak current mode step-down
converter. The inner, wide bandwidth loop controls
the inductor peak current. The 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 for
duty cycles greater than 50%. The loop appears
as a voltage-programmed current source in paral-
lel with the output capacitor.
Soft Start/Enable
Soft start increases the inductor current limit point in
discrete steps once the input voltage or enable
input is applied. It limits the current surge seen at
the input and eliminates output voltage overshoot.
When pulled low, the enable input forces the
AAT1156 into a non-switching shutdown state. The
total input current during shutdown is less than 1µA.
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 external voltage feedback resistive
divider divides the output voltage to the error ampli-
fier reference voltage of 0.6V. The voltage error
amplifier DC gain is limited. This eliminates the
need for external compensation components, while
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 switch-
ing. The low pass filter R1 and C2 (shown in the
schematic in Figure 1) filters the input noise asso-
ciated with the power switching.
1156.2005.11.1.2
7
AAT1156
1MHz 700mA Step-Down DC-DC Converter
U1
AAT1156
Enable
Vin+
Vout+
12
11
10
7
4
VP
FB
LX
R3
15
14
13
16
3
R1
100
200k
VP
L1
4.7µH
VP
LX
R2
EN
LX
100K
C1
10µF
9
VCC
LL
N/C
R4
59k
6
C2
0.1 µF
PGND
PGND
PGND
R6
100k
8
2
C3,C4
2 x 22µF
N/C
SGND
5
1
C1 Murata 10µF 6.3V X5R GRM42-6X5R106K6.3
LL
C3, C4 MuRata 22µF 6.3V GRM21BR60J226ME396 X5R 0805
L1 Sumida CDRH3D16-4R7NC
Figure 1: AAT1156 Evaluation Board Schematic—Lithium-Ion to 2.5V Converter.
Current Limit and Over-Temperature
Protection
VOUT
IO ⋅ k ⋅ F
⎛
VOUT
VIN
⎞
⎠
L =
L =
⋅ 1 -
⎝
For overload conditions, the peak input current is lim-
ited. 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 inter-
nal dissipation becomes excessive, protecting the
device from damage. The junction over-temperature
threshold is 140°C with 15°C of hysteresis.
1.5V
1.5V
4.2V
⎛
⎞
⎠
⋅ 1 -
⎝
0.7A ⋅ 0.4 ⋅ 1MHz
L = 3.44µH
The factor "k" is the fraction of full load selected for
the ripple current at the maximum input voltage.
For ripple current at 40% of the full load current, the
peak current will be 120% of full load. Selecting a
standard value of 3.3µH gives 42% ripple current.
A 3.3µH inductor selected from the Sumida
CDRH3D16 series has a 63mΩ DCR and a 1.1A
DC current rating. At full load, the inductor DC loss
is 31mW which amounts to less than 3% loss in
efficiency for a 0.7A, 1.5V output.
Inductor
The output inductor is selected to limit the ripple cur-
rent to a 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. Some inductors may meet the peak and
average current ratings yet result in excessive losses
due to a high DCR. Always consider the losses asso-
ciated with the DCR and its effect on the total con-
verter efficiency when selecting an inductor.
Input Capacitor
The primary function of the input capacitor is to pro-
vide a low impedance loop for the edges of pulsed
current drawn by the AAT1156. A low ESR/ESL
ceramic capacitor is ideal for this function. To mini-
mize stray inductance, the capacitor should be
placed as closely as possible to the IC. This keeps
the high frequency content of the input current local-
ized, minimizing radiated and conducted EMI while
facilitating optimum performance of the AAT1156.
Ceramic X5R or X7R capacitors are ideal for this
function. The size required will vary depending on
For a 0.7A, 1.5V output with the ripple set to 40%
at a maximum input voltage of 4.2V, the maximum
peak-to-peak ripple current is 280mA. The induc-
tance value required is 3.44µH.
8
1156.2005.11.1.2
AAT1156
1MHz 700mA Step-Down DC-DC Converter
the load, output voltage, and input voltage source
For an X7R or X5R ceramic capacitor, the ESR is
so low that dissipation due to the RMS current of
the capacitor is not a concern. Tantalum capacitors
with sufficiently low ESR to meet output voltage rip-
ple requirements also have an RMS current rating
well beyond that actually seen in this application.
impedance characteristics. Values range from 1µF
to 10µF. The input capacitor RMS current varies
with the input voltage and output voltage. The equa-
tion for the RMS current in the input capacitor is:
VO
VIN
⎛
VO ⎞
VIN ⎠
IRMS = IO ⋅
⋅ 1 -
⎝
Layout
Figures 2 and 3 display the suggested PCB layout
for the AAT1156. The following guidelines should
be used to help ensure a proper layout.
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 cur-
rent. Losses associated with the input ceramic
capacitor are typically minimal and are not an
issue. Proper placement of the input capacitor is
shown in the reference design layout in Figure 2.
1. The input capacitor (C1) should connect as
closely as possible to VP (Pins 10, 11, and 12)
and PGND (Pins 1, 2, and 3).
2. C3, C4, and L1 should be connected as closely
as possible. The connection from L1 to the LX
node should be as short as possible.
3. The feedback trace (Pin 4) should be separate
from any power trace and connect as closely
as possible to the load point. Sensing along a
high-current load trace will degrade DC load
regulation.
4. The resistance of the trace from the load return
to the PGND (Pins 1, 2, and 3) should be kept
to a minimum. This will help to minimize any
error in DC regulation due to differences in the
potential of the internal signal ground and the
power ground.
Output Capacitor
Since there are no external compensation compo-
nents, 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, 0.7A design using the 3.3µH inductor,
two 22µF capacitors provide a stable output. In
addition to assisting in stability, the output capacitor
limits the output ripple and provides holdup during
large load transitions. The output capacitor RMS
ripple current is given by:
5. Low pass filter R1 and C2 provide a cleaner
bias source for the AAT1156 active circuitry.
C2 should be placed as closely as possible to
SGND (Pin 5) and VCC (Pin 9).
VOUT
⋅
(VIN - VOUT
VIN
)
1
IRMS
=
⋅
L
⋅ F ⋅
2
⋅ 3
Figure 2: QFN Evaluation Board Top Side.
Figure 3: QFN Evaluation Board Bottom Side.
1156.2005.11.1.2
9
AAT1156
1MHz 700mA Step-Down DC-DC Converter
Thermal Calculations
There are three types of losses associated with the AAT1156: MOSFET switching losses, conduction losses,
and quiescent current losses. The conduction losses are due to the RDS(ON) characteristics of the internal P-
and N-channel MOSFET power devices. At full load, assuming continuous conduction mode (CCM), a simpli-
fied form of the total losses is given by:
IO2 ⋅ (RDSON(HS) ⋅ VO + RDSON(LS) ⋅ (VIN - VO))
P =
+ (tsw ⋅ F ⋅ IO ⋅ VIN + IQ) ⋅ VIN
VIN
where IQ is the AAT1156 quiescent current.
Once the total losses have been determined, the junction temperature can be derived from the θJA for the
QFN33-16 package.
TJ = P · ΘJA + TAMB
Adjustable Output
Resistors R3 and R4 of Figure 1 force the output to regulate higher than 0.6V. The optimum value for R4 is
59kΩ. Values higher than this may cause problems with stability, while lower values can degrade light load
efficiency. For a 2.5V output with R4 set to 59kΩ, R3 is 187kΩ.
V
2.5V
0.6V
⎛
⎝
⎞
⎛
⎝
⎞
⎠
O
R3 =
-1 · R4 =
- 1 · 59kΩ = 187kΩ
V
⎠
REF
500
R4=59kΩ
450
400
350
300
250
200
150
100
50
0
1
1.5
2
2.5
3
3.5
4
4.5
5
5.5
Output Voltage (V)
Figure 4: R3 vs. VOUT for Adjustable Output Using the AAT1156.
10
1156.2005.11.1.2
AAT1156
1MHz 700mA Step-Down DC-DC Converter
Design Example
Specifications
IOUT
0.7A
IRIPPLE 40% of Full Load at Max VIN
VOUT 2.5V
VIN
FS
2.7V to 4.2V (3.6V nominal)
1MHz
TAMB 85°C
Maximum Input Capacitor Ripple:
V
V
O
⎛
⎞
⎠
O
IRMS = IO ·
· 1-
= 0.34Arms, VIN = 2 x VO
⎝
V
V
IN
IN
P = esr · IRMS2 = 5mΩ · 0.342 A = 0.6mW
Inductor Selection:
VOUT
IO ⋅ k ⋅ F
⎛
VOUT
VIN
⎞
⎠
2.5
V
2.5V
4.2V
⎛
⎞
⎠
L =
⋅ 1 -
⎝
=
⋅ 1 -
⎝
= 4.82µH
0.7A ⋅ 0.3 ⋅ 1MHz
Select Sumida inductor CDRH3D16 or CDRH4D28 4.7µH.
⎛
⎞
2.5V
⎠
4.2V
VO
L ⋅ F
VO
VIN
2.5
V
⎛
⎞
⎠
∆I =
⋅ 1 -
⎝
=
⋅ 1-
= 220mA
⎝
4.7µH ⋅ 1MHz
∆I
2
IPK = IOUT
+
= 0.7A + 0.11A = 0.81A
P = IO2 ⋅ DCR = (0.7A)2 ⋅ 80mΩ = 40mW
1156.2005.11.1.2
11
AAT1156
1MHz 700mA Step-Down DC-DC Converter
Output Capacitor Ripple Current:
VOUT · (VIN - VOUT
)
1
2.5V · (4.2V - 2.5V)
= 62mArms
4.7µH · 1MHz · 4.2V
1
·
IRMS
=
·
=
L·F·V
2· 3
2· 3
IN
Pesr = esr · IRMS2 = 5mΩ · (62 mA)2 = 19µW
AAT1156 Dissipation:
IO2 · (RDSON(HS) · VO + RDSON(LS) · (VIN -VO))
PTOTAL
=
+ (tsw · F · IO + IQ) · VIN
VIN
(0.7A)2 · (0.17Ω · 2.5V + 0.16Ω · (4.2V - 1.5V))
=
+ (20nsec · 1MHz · 0.7A + 300µA) · 4.2V = 0.141W
4.2V
TJ(MAX) = TAMB + ΘJA · PLOSS = 85°C + 50°C/W · 0.141W = 92°C
U1
AAT1156
AAT1156 Efficiency
(VOUT = 0.8V; L = 2.2µH; CDRH3D16)
INPUT
0.8V
12
11
10
7
4
VP
FB
LX
R3
15
14
13
16
3
100
90
80
70
60
50
40
30
20
R1
100
19.6k
VP
L1
2.2µH
VP
LX
C1
10µF
VIN = 2.7V
EN
LX
9
VCC
LL
N/C
VIN = 4.2V
R4
59k
C3, C4
6
PGND
PGND
PGND
2 x 22µF
VIN = 3.6V
C2
0.1 µF
8
2
N/C
SGND
5
1
C1 Murata 10µF 6.3V X5R GRM42-6X5R106K6.3
C3, C4 MuRata 22µF 6.3V GRM21BR60J226ME39L X5R 0805
L1 Sumida CDRH3D16-2R2NC
1
10
100
1000
Output Current (mA)
Figure 5: 0.8V Solution.
12
1156.2005.11.1.2
AAT1156
1MHz 700mA Step-Down DC-DC Converter
Surface Mount Inductors
Max DC
Current
Size (mm)
L x W x H
Manufacturer Part Number
Value
DCR
Type
TaiyoYuden
Toko
NPO5DB4R7M
4.7µH
3.5µH
4.7µH
2.2µH
3.3µH
4.7µH
4.2µH
4.1µH
4.7µH
4.7µH
1.4A
1.34A
1.32A
1.2A
1.1A
0.9
0.038
0.073
0.072
0.050
0.063
0.080
0.031
0.057
0.041
0.025
5.9x6.1x2.8
5.0x5.0x2.0
4.7x4.7x3.0
3.8x3.8x1.8
3.8x3.8x1.8
3.8x3.8x1.8
5.7x5.7x3.0
5.7x5.7x2.0
5.0x5.0x4.7
6.3x6.3x4.7
Shielded
Shielded
Shielded
Shielded
Shielded
Shielded
Shielded
Sielded
A914BYW-3R5M-D52LC
CDRH4D28-4R7
CDRH3D16-2R2
CDRH3D16-3R3
CDRH3D16-4R7
CDRH5D28-4R2
CDRH5D18-4R1
LQH55DN4R7M03
LQH66SN4R7M03
Sumida
Sumida
Sumida
Sumida
Sumida
Sumida
MuRata
MuRata
2.2A
1.95A
2.7A
2.2A
Non-Shielded
Shielded
Surface Mount Capacitors
Manufacturer
Part Number
Value
Voltage
Temp. Co.
Case
MuRata
MuRata
MuRata
GRM40 X5R 106K 6.3
GRM42-6 X5R 106K 6.3
GRM21BR60J226ME39L
10µF
10µF
22µF
6.3V
6.3V
6.3V
X5R
X5R
X5R
0805
1206
0805
1156.2005.11.1.2
13
AAT1156
1MHz 700mA Step-Down DC-DC Converter
Ordering Information
Output Voltage
Package
Marking1
Part Number (Tape and Reel)2
AAT1156IVN-T1
0.6V (Adj VOUT ≥ 0.8V)
QFN33-16
LUXYY
Package Information
0.230 0.05
Pin 1 Identification
1
5
Pin 1 Dot By Marking
13
9
3.000 0.05
0.500 0.05
Top View
Bottom View
0.203 0.0254
Side View
1. XYY = assembly and date code.
2. Sample stock is generally held on part numbers listed in BOLD.
© 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 con-
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.
Advanced Analogic Technologies, Inc.
830 E. Arques Avenue, Sunnyvale, CA 94085
Phone (408) 737-4600
Fax (408) 737-4611
14
1156.2005.11.1.2
相关型号:
©2020 ICPDF网 联系我们和版权申明