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AAT1162 PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 AAT1162
기능 Step-Down DC/DC Converter
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AAT1162
12V, 1.5A Step-Down DC/DC Converter
General Description
Features
SwitchReg
The AAT1162 is an 800kHz high efficiency step-
down DC/DC converter. With a wide input voltage
range of 4.0V to 13.2V, the AAT1162 is an ideal
choice for dual-cell Lithium-ion battery-powered
devices and mid-power-range regulated 12V-pow-
ered industrial applications. The internal power
switches are capable of delivering up to 1.5A to the
load.
The AAT1162 is a highly integrated device, simpli-
fying system-level design. Minimum external com-
ponents are required for the converter.
The AAT1162 optimizes efficiency throughout the
entire load range. It operates in a combination
PWM/Light Load mode for improved light-load effi-
ciency. 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 AAT1162 is available in a Pb-free, space-sav-
ing, thermally-enhanced 16-pin TDFN34 package-
and is rated over an operating temperature range
of -40°C to +85°C.
Typical Application
• Input Voltage Range: 4.0V to 13.2V
• Up to 1.5A Load Current
• Fixed or Adjustable Output:
— Output Voltage: 0.6V to VIN
• Low 115µA No-Load Operating Current
• Less than 1µA Shutdown Current
• Up to 96% Efficiency
• Integrated Power Switches
• 800kHz Switching Frequency
• Soft Start Function
• Short-Circuit and Over-Temperature Protection
• Minimum External Components
• TDFN34-16 Package
• Temperature Range: -40°C to +85°C
Applications
• Distributed Power Systems
• Industrial Applications
• Laptop Computers
• Portable DVD Players
• Portable Media Players
• Set-Top Boxes
• TFT LCD Monitors and HDTVs
Input:
4.0V ~ 13.2V
CIN
IN
EN
DGND
AIN AAT1162
LX
FB
COMP
LDO
PGND
AGND
L
2.2µH
Output:
0.6V min,
1.5A max
COUT
47µF
1162.2007.06.1.1
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AAT1162 pdf, 반도체, 판매, 대치품
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AAT1162
12V, 1.5A Step-Down DC/DC Converter
Electrical Characteristics1
4.0V < VIN < 13.2V. CIN = COUT = 22µF; L = 4.7µH, TA = -40°C to +85°C, unless otherwise noted. Typical val-
ues are at TA = 25°C.
Symbol
VIN
VUVLO
Description
Input Voltage Range
Input Under-Voltage Lockout
IQ
ISHDN
VOUT
VOUT
VOUT/
VOUT/VIN
VOUT/
IOUT
VFB
Supply Current
Shutdown Current
Output Voltage Range
Output Voltage Accuracy
Line Regulation
Load Regulation
Feedback Reference Voltage
(adjustable version)
IFBLEAK FB Leakage Current
FOSC
DC
TON
TS
RDS(ON)H
PWM Oscillator Frequency
Foldback Frequency
Maximum Duty Cycle
Minimum Turn-On Time
Soft-Start Time
P-Channel On Resistance
RDS(ON)L
η
ILIM
ILXLEAK
N-Channel On Resistance
Efficiency
PMOS Current Limit
LX Leakage Current
Conditions
Min Typ Max Units
Rising
Hysteresis
No Load
VEN = GND
IOUT = 0A to 1.5A
4.0 13.2 V
4.0
0.3
V
115 200
µA
1 µA
0.6 0.94 VIN V
-2.5 2.5 %
VIN = 4.5V to 13.2V
0.023 0.100 %/V
VIN = 12V, VOUT = 5V,
IOUT = 0A to 1.5A
0.4 %
No Load, TA = 25°C
0.59 0.60 0.61
V
Adjustable Version
VOUT = 1.2V Fixed Version
0.6
2
0.8
200
100
200
VIN = 12V
0.12
VIN = 6V
0.15
VIN = 12V
0.06
VIN = 6V
0.08
VIN = 12V, VOUT = 5V, IOUT = 1.5A
93
2.0 3.0
VIN = 13.2V, VLX = 0 to VIN
0.2
1
94
1
µA
MHz
kHz
%
ns
µs
%
A
µA
1. The AAT1162 is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is assured
by design, characterization, and correlation with statistical process controls.
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AAT1162
12V, 1.5A Step-Down DC/DC Converter
Typical Characteristics
Test circuit of Figure 2, unless otherwise specified.
Switching Quiescent Current vs. Input Voltage
(VOUT = 3.3V)
210
200
85°C
190 25°C
180
170
-40°C
160
150
5 6 7 8 9 10 11 12
Input Voltage (V)
On Time vs. Temperature
(VOUT = 3.3V)
1000
900
800
700 VIN = 5V
600
500
400 VIN = 12V
300
200
100
0
-40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90
Temperature (°C)
Output Voltage Tolerance vs. Temperature
(VOUT = 3.3V; ILOAD = 1.5A)
1
0.8
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90
Temperature (°C)
0.4
0.3
0.2
0.1
0
-0.1
-0.2
-0.3
6
Line Regulation
(VOUT = 5V)
IOUT = 500mA IOUT = 1.5A
IOUT = 1mA
IOUT = 10mA
IOUT = 100mA
7 8 9 10 11 12
Input Voltage (V)
Line Regulation
(VOUT = 3.3V)
0.4
IOUT = 1A
0.3 IOUT = 10mA
0.2 IOUT = 1.5A
0.1
0
-0.1
IOUT =100mA
IOUT = 1mA
-0.2
-0.3
5 6 7 8 9 10 11 12
Input Voltage (V)
0.4
0.3
0.2
0.1
0
-0.1
-0.2
-0.3
0.0001
Load Regulation
(VOUT = 5V)
VIN = 12V
VIN = 10V
VIN = 8.4V
VIN = 6V
0.001
0.01
0.1
Output Current (mA)
1
10
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