AAT1189 Datasheet PDF - AAT
| Part Number | AAT1189 | |
| Description | High Voltage Step-Down Regulator | |
| Manufacturers | AAT | |
| Logo |  |
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SwitchRegTM
General Description
The AAT1189 is a single output step-down (Buck) DC
output regulator with an integrated high side MOSFET.
The input range is 6V to 24V making it the ideal power IC
solution for consumer communications equipment oper-
ating from a low cost AC/DC adapter with 12V output.
The step-down regulator provides up to 2.5A output cur-
rent in a small package. 490kHz fixed switching fre-
quency allows small L/C filtering components.
Voltage mode control allows for optimum performance
across the entire output voltage and load range.
The controller includes programmable over-current, inte-
grated soft-start and over-temperature protection.
The AAT1189 is available in the Pb-free, low profile
16-pin TDFN34 package. The rated operating tempera-
ture range is -40°C to 85°C.
PRODUCT DATASHEET
AAT1189
High Voltage Step-Down Regulator
Features
• VIN = 6.0 to 24.0V
• VOUT Adjustable from 1.5V to 5.5V
• IOUT up to 2.5A
• Small Solution Size
• Low-Cost Non-Synchronous Solution
• Shutdown Current <35μA
• High Switching Frequency
• Voltage Mode Control
• PWM Fixed Frequency for Lowest Noise
▪ Programmable Over-Current Protection
• Over-Temperature Protection
• Internal Soft Start
• Low Profile 3x4mm TDFN-16 Packages
• -40°C to 85°C Temperature Range
Applications
• DSL and Cable Modems
• Notebook Computers
• Satellite Set Top Box
• Wireless LAN Systems
Typical Application
VIN
6.0V - 24.0V
C1
100µF
25V
+
EN
C12
1µF
25V
C3
2.2µF
TDFN 34-16
IN
BST
LX
EN
AAT1189
RS
VL
OS
FB
COMP
GND
D1
BAS16
C2
0.1µF
D2
B340A
L1
4.7µH
R1
6.34K
C7
330pF
C4
68nF
R3
499
VOUT
5V/2.5A
R4
44.2K
C8 C9
22µF 22µF
R2 C5
24.3K 220pF
C6
56pF
R5
6.04K
1189.2008.06.1.0
www.analogictech.com
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SwitchRegTM
Typical Characteristics
Step-Down Converter Efficiency vs. Load
(VOUT = 3.3V; L = 4.7µH)
100
90
80
70
60
50
40
30
20
10
0
0.1
1
VIN = 6V
VIN = 8V
VIN = 12V
VIN = 18V
VIN = 24V
10
100
1000
10000
Output Current (mA)
Step-Down Converter DC Regulation
(VOUT = 3.3V; L = 4.7µH)
2.0
1.5
VIN = 6V
VIN = 8V
1.0 VIN = 12V
VIN = 18V
0.5 VIN = 24V
0.0
-0.5
-1.0
-1.5
-2.0
0.1
1 10 100 1000
Output Current (mA)
10000
Step-Down Converter Line Regulation
(VOUT = 3.3V; L = 4.7µH)
2.0
1.5
1.0
0.5
0.0
-0.5
-1.0
-1.5
-2.0
6
IOUT = 0.10mA
IOUT = 10mA
IOUT = 100mA
IOUT = 1250mA
IOUT = 2500mA
8 10 12 14 16 18 20 22 24
Input Voltage (V)
PRODUCT DATASHEET
AAT1189
High Voltage Step-Down Regulator
Step-Down Converter Efficiency vs. Load
(VOUT = 5V; L = 4.7µH)
100
90
80
70
60
50
40
30
20
10
0
0.1
1
VIN = 6V
VIN = 8V
VIN = 12V
VIN = 18V
VIN = 24V
10
100
1000
10000
Output Current (mA)
Step-Down Converter DC Regulation
(VOUT = 5V; L = 4.7µH)
3.0
2.5
2.0
1.5
1.0
0.5
0.0
-0.5
-1.0
-1.5
-2.0
-2.5
-3.0
0.1
1
VIN = 6V
VIN = 8V
VIN = 12V
VIN = 18V
VIN = 24V
10
100
1000
10000
Output Current (mA)
Step-Down Converter Line Regulation
(VOUT = 5V; L = 4.7µH)
2.0
1.5
1.0
0.5
0.0
-0.5
-1.0
-1.5
-2.0
-2.5
-3.0
-3.5
-4.0
6
IOUT = 0.10mA
IOUT = 10mA
IOUT = 100mA
IOUT = 1250mA
IOUT = 2500mA
8 10 12 14 16 18 20 22 24
Input Voltage (V)
1189.2008.06.1.0
www.analogictech.com
5
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for AAT1189 electronic component. |
| Information | Total 19 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ AAT1189.PDF Datasheet ] | |
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