DataSheet.es    


PDF AAT1156 Data sheet ( Hoja de datos )

Número de pieza AAT1156
Descripción Step-Down DC-DC Converter
Fabricantes AAT　
Logotipo AAT Logotipo



Hay una vista previa y un enlace de descarga de AAT1156 (archivo pdf) en la parte inferior de esta página.


Total 14 Páginas

No Preview Available ! AAT1156 Hoja de datos, Descripción, Manual

AAT1156
1MHz 700mA Step-Down DC-DC Converter
General Description
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.
The AAT1156 is available in the 16-pin 3x3mm
QFN package and is rated over the -40°C to +85°C
temperature range.
Features
SwitchReg™
• 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
Applications
•
•www.DataSheet4U.com
•
•
•
•
Cellular Phones
Digital Cameras
MP3 Players
Notebook Computers
PDAs
Wireless Notebook Adapters
Typical Application
INPUT
R1
100
C1
10µF
C2
0.1 µF
U1
AAT1156
12 VP
FB 4
11 VP
LX 15
10 VP
LX 14
7 EN
LX 13
9 VCC
NC 16
6 LL
PGND 3
8 NC
PGND 2
5 SGND PGND 1
L1
4.7µH
R4
59k
2.5V
R3
187k
C3, C4
2 x 22µF
C1 Murata 10µF 6.3V X5R GRM42-6X5R106K6.3
C3-C4 MuRata 22µF 6.3V GRM21BR60J226ME39L X5R 0805
L1 Sumida CDRH3D16-4R7NC
AAT1156 Efficiency
(VOUT = 2.5V; L = 4.7µH; CDRH3D16)
100
95
90
85
80
75
70
65
60
55
50
1
VIN = 3.0V
VIN = 4.2V
VIN = 3.6V
10
100
Output Current (mA)
1000
1156.2005.11.1.2
1

1 page




AAT1156 pdf
Typical Characteristics
Output Ripple
(0.8V; 10mA; VIN = 3.6V)
20
10
0
-10
-20
-30
-40
-50
-60
Time (2µs/div)
AAT1156
1MHz 700mA Step-Down DC-DC Converter
Soft Start
(0.8V; 700mA; VIN = 3.6V)
1.4 2
1.2 1.5
11
0.8 0.5
0.6 0
0.4 -0.5
0.2 -1
0 -1.5
-0.2 -2
3.5
3
2.5
2
1.5
1
0.5
0
-0.5
Time (100µs/div)
Output Ripple
(0.8V; 700mA; VIN = 3.6V)
20 3.5
10 3
0 2.5
-10 2
-20 1.5
-30 1
-40 0.5
-50 0
-60 -0.5
Time (250ns/div)
Line Transient
(IOUT = 500mA; VO = 0.8V)
4.4 60
4.2 50
4 40
3.8 30
3.6 20
3.4 10
3.2 0
3 -10
2.8 -20
Time (20µsec/div)
Load Transient Response
(50mA-680mA; VIN = 3.6V; VOUT = 0.8V)
0.83
0.81
0.79
0.77
0.75
0.73 Ø
0.71
0.69 Ø
0.67
Time (10µsec/div)
1156.2005.11.1.2
No Load Supply Current vs. Input Voltage
300
85°C
250
200
150
-40°C
100
25°C
50
0
2.5 3 3.5 4 4.5 5 5.5
Input Voltage (V)
5

5 Page





AAT1156 arduino
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 2.7V to 4.2V (3.6V nominal)
FS 1MHz
TAMB 85°C
Maximum Input Capacitor Ripple:
IRMS = IO ·
VO · ⎛1-
VIN ⎝
VO ⎞
VIN ⎠
= 0.34Arms,
VIN =
2x
VO
P = esr · IRMS2 = 5mΩ · 0.342 A = 0.6mW
Inductor Selection:
L=
VOUT
IO ⋅ k ⋅
F
⋅
⎛⎝1
-
VOUT⎞
VIN ⎠
=
2.5V
0.7A ⋅ 0.3 ⋅ 1MHz
⋅ ⎛⎝1 -
2.5V⎞
4.2V⎠
= 4.82µH
Select Sumida inductor CDRH3D16 or CDRH4D28 4.7µH.
∆I =
VO
L⋅F
⋅
⎛⎝1
-
VO
VIN
⎞
⎠
=
2.5V
4.7µH ⋅ 1MHz
⋅ ⎛⎝1-
2.5V⎞
4.2V⎠
=
220mA
IPK
=
IOUT
+
∆I
2
=
0.7A
+
0.11A
=
0.81A
P = IO2 ⋅ DCR = (0.7A)2 ⋅ 80mΩ = 40mW
1156.2005.11.1.2
11

11 Page







PáginasTotal 14 Páginas
PDF Descargar[ Datasheet AAT1156.PDF ]




Hoja de datos destacado

Número de piezaDescripciónFabricantes
AAT11501MHz 1A Step-Down DC/DC ConverterAdvanced Analogic Technologies
Advanced Analogic Technologies
AAT1151DC/DC ConverterAAT
AAT
AAT1152850kHz 1A Synchronous Buck DC/DC ConverterAdvanced Analogic Technologies
Advanced Analogic Technologies
AAT11532A Step-Down ConverterAdvanced Analogic Technologies
Advanced Analogic Technologies

Número de piezaDescripciónFabricantes
SLA6805M

High Voltage 3 phase Motor Driver IC.

 Sanken
Sanken
SDC1742

12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters.

 Analog Devices
Analog Devices


DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares,
permitiéndote verlos en linea o descargarlos en PDF.


DataSheet.es    |   2020   |  Privacy Policy  |  Contacto  |  Buscar