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AAT1189 Datasheet, PDF (1/19 Pages) Advanced Analogic Technologies – High Voltage Step-Down Regulator | |||
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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 -40ï°C to 85ï°C.
DATA SHEET
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
C11
1µF
50V
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
R3
68nF
499
VOUT
5V/2.5A
R4
44.2K
C8
C9
22µF 22µF
R2
C5
24.3K 220pF
C6
56pF
R5
6.04K
Skyworks Solutions, Inc. ⢠Phone [781] 376-3000 ⢠Fax [781] 376-3100 ⢠sales@skyworksinc.com ⢠www.skyworksinc.com
202002A ⢠Skyworks Proprietary Information ⢠Products and Product Information are Subject to Change Without Notice. ⢠May 31, 2012
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