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AAT1161 PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 AAT1161
기능 3A Step-Down Converter
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AAT1161 데이터시트, 핀배열, 회로
SwitchRegTM
PRODUCT DATASHEET
AAT1161
13.2V Input, 3A Step-Down Converter
General Description
The AAT1161 is an 800kHz high efficiency step down
DC-DC converter with wide input voltage range. With
4.0V to 13.2V input rating, the AAT1161 is the perfect
choice for 2-cell Li+ battery powered devices and mid
power range regulated 12V powered applications. The
internal power switch is capable of delivering up to 3A
load current.
The AAT1161 is a highly integrated device in order to
www.DatasSihmeeptl4iUfy.cosmystem level design for the users. It is a non-
synchronous converter that is used with an external
Schottky diode rectifier for low-cost applications.
Minimum external components are required for the con-
verter. All the control circuits are integrated in the IC.
The AAT1161 optimizes efficiency throughout the entire
load range. It operates in a combination PWM/Light Load
mode for improved light-load efficiency. It can also oper-
ate in a forced Pulse Width Modulation (PWM) mode for
easy control of the switching noise as well as faster tran-
sient response. The high switching frequency allows the
use of small external components. The low current shut-
down feature disconnects the load from VIN and drops
shutdown current to less than 1μA.
The AAT1161 is available in a Pb-free, space-saving,
thermally-enhanced 14-pin TDFN33 package and is rated
over an operating temperature range of -40°C to +85°C.
Features
Input Voltage Range : 4.0V to 13.2V
Up to 3A Load Current
Fixed or Adjustable Output:
Output Voltage: 0.6V to VIN
Less than 1μA Shutdown Current
Up to 95% Efficiency
Integrated High-Side Power Switch
External Schottky Rectifier
800kHz Switching Frequency
Soft Start Function
Short-Circuit and Over-Temperature Protection
Minimum External Components
Tiny 14-pin 3x3mm TDFN Package
Temperature Range: -40°C to +85°C
Applications
Digital Camcorders
Industrial Applications
Portable DVD Players
Rack Mounted Systems
Set Top Boxes
Typical Application
VIN 4.5V- 13.2V
C6
10µF
R4
10
C8
1µF
C2
0.1µF
6 EN
10
IN
11
IN
13
AIN
LX 8
LX 9
AAT1161 FB 1
PGND 12
4, 5
DGND
COMP 2
7 N/C
PGND
AGND 3
14
LDO
EP1
C9
1µF
L1
3.8µH
C1
D1 100pF
R5
51k
VOUT
5V, 3A
R3
432 k
C3, 4, 5
66µF
R6
59k
C7
150pF
1161.2008.03.1.0
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AAT1161 pdf, 반도체, 판매, 대치품
SwitchRegTM
PRODUCT DATASHEET
AAT1161
13.2V Input, 3A Step-Down Converter
Electrical Characteristics
4.0V < VIN < 13.2V. CIN= 22µF, COUT= 66µF; L= 2.2µH or 3.8µH, TA= -40 to +85°C unless otherwise noted. Typical val-
ues are at TA= 25°C.
Symbol Description
Conditions
VIN Input Voltage Range
VUVLO
Input Under-Voltage Lockout
IQ
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VOUT
Supply Current
Shutdown Current
Output Voltage Range
Rising
Hysteresis
No Load
VEN = GND
VOUT
VLINEREG/
VIN
VLOADREG
VFB
IFBLEAK
FOSC
TS
DC
TON
TSS
RDS(ON)H
η
ILIM
ILXLEAK
TSD
THYS
VILEN
VIHEN
IEN
Output Voltage Accuracy
IOUT = 0A to 3A
Line Regulation
VIN = 4.5V to 13.2V
Load Regulation
Feedback Reference Voltage (adjustable
version)
FB Leakage Current
Oscillator Frequency
Start-Up Time
Foldback Frequency
Maximum Duty Cycle
Minimum Turn-On Time
Soft-Start Time
P-Channel On Resistance
Efciency
PMOS Current Limit
LX Leakage Current
Over-Temperature Shutdown Threshold
Over-Temperature Shutdown Hysteresis
EN Logic Low Input Threshold
EN Logic High Input Threshold
EN Input Current
VIN = 12V, VOUT = 5V, IOUT = 0A to 3A
No Load, TA = 25°C
VOUT = 1.2V
Adjustable Version
Fixed Version
IOUT = 3A, VOUT = 5V
VIN = 12V
VIN = 6V
VIN = 12V, VOUT = 5V, IOUT = 3A
VIN = 13.2V, VLX = 0 to VIN
VEN = 0V, VEN = 13.2V
Min
4.0
0.6
-2.5
0.59
0.6
4.0
1.4
-1.0
Typ
0.3
150
0.023
0.4
0.60
2
0.8
2
200
100
2
0.12
0.15
90
6.0
140
25
Max
13.2
4.0
300
1
0.94
VIN
2.5
0.61
0.2
1
94
1
0.4
1.0
Units
V
V
µA
µA
V
%
%/V
%
V
µA
MHz
ms
kHz
%
ns
ms
%
A
µA
°C
°C
V
V
µA
1. The AAT1161 is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is assured by design, characterization, and correla-
tion with statistical process controls.
4
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AAT1161 전자부품, 판매, 대치품
SwitchRegTM
Typical Characteristics
Load Transient
(VOUT = 5.0V; CFF = 100pF; IOUT = 50mA to 3A; COUT = 66µF)
5.6 8
5.4 7
5.2 6
5.0 5
4.8 4
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3
4.4 2
4.2 1
4.0 0
Time (200ms/div)
PRODUCT DATASHEET
AAT1161
13.2V Input, 3A Step-Down Converter
Start-Up Time
(VOUT = 5.0V; CFF = 100pF; RLOAD = 1.67;
CIN = 10µF; COUT = 22µF; L = 3.8µH)
97
76
55
34
13
-1 2
-3 VENABLE 1
-5
VOUT
ILOAD
0
-7 -1
Time (1ms/div)
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