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AAT1185 PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 AAT1185
기능 High Voltage Step-Down Controller
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AAT1185 데이터시트, 핀배열, 회로
General Description
The AAT1185 is a single output step-down (Buck) regu-
lator controller with an input range of 6V to 24V. The
output range is adjustable from 0.8V to 5.5V.
The device provides high and low-side pins to drive
external n-channel MOSFETs; allowing fully synchronous
operation for maximum efficiency and performance.
Alternately, the low-side MOSFET may be replaced with
a Schottky rectifier. Both high and low-side drive pins are
compatible with a wide range of external MOSFETs mak-
ing the device the ideal control solution for low power
and high power configurations.
Voltage mode control allows for optimum performance
across the entire output voltage and load range. The
490kHz fixed switching frequency allows wide range of
L/C filtering components, achieving smallest size and
maximum efficiency. External compensation allows the
designer to optimize the transient response.
The controller includes programmable over-current, inte-
grated soft-start and over-temperature protection.
The AAT1185 is available in the Pb-free, 14-pin TSOPJW
package. The rated operating temperature range is
-40°C to 85°C.
DATA SHEET
AAT1185
High Voltage Step-Down Controller
Features
 VIN = 6.0V to 24.0V
 VOUT Adjustable from 0.8V to 5.5V
 IOUT from <1A up to 10A
 Small Solution Size
 Ultra-small External L/C
 Synchronous or Non-Synchronous
 Shutdown Current <30μA
 High Switching Frequency
 Voltage Mode Control
 PWM Fixed Frequency for Lowest Noise
Programmable Over-Current Protection
 Over-Temperature Protection
 Internal Soft Start
 2.85x3mm TSOPJW-14 Package
 -40°C to 85°C Temperature Range
Applications
• DSL and Cable Modems
• Notebook Computers
• Satellite Set Top Boxes
• Wireless LAN Systems
Typical Application
VIN
6V - 24V
C7
2.2μF
D1
BAS16
C3
470μF
25V
C5
10μF
25V
U1
BST
VCC
DH
AAT1185
HV LX
EN DL
RS
R1
3.32
R2
3.32
C8
0.1μF
Q1
Q2
PGND OS
COMP FB
TSOPJW-14
R4
20K
L1
3.9μH
R3
1.74K
C9
0.47μF
C10
33pF
C11
680pF
VOUT
3.3V/10A
R5 R6
1K 27.4K
C12
680pF
C13, C14
2×47μF
R7
6.04k
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
202001A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • May 31, 2012
1




AAT1185 pdf, 반도체, 판매, 대치품
DATA SHEET
AAT1185
High Voltage Step-Down Controller
Electrical Characteristics1
VIN1 = 12.0V; TA = -40°C to 85°C unless otherwise noted. Typical values are at TA = 25°C.
Symbol
VIN
VUVLO
VOUT
VFB
IQ
ISHDN
VOCP
ILX
DMAX
TON(MIN)
RDH
RDL
FOSC
FFOLDBACK
TS
TSD
VEN(L)
VEN(H)
IEN
Description
Input Voltage
UVLO Threshold
Output Voltage Range
Feedback Pin Voltage
Quiescent Current
Shutdown Current
Over-Current Offset Voltage
LX1 Pin Leakage Current
Maximum Duty Cycle
Minimum On-Time
High Side Drive Source Resistance
Low Side Drive Source Resistance
Oscillator Frequency
Short Circuit Foldback Frequency
Start-Up Time
Over-Temperature Shutdown Threshold
Over-Temperature Shutdown Hysteresis
Enable Threshold Low
Enable Threshold High
Input Low Current
Conditions
VIN Rising
VIN Hysteresis
VIN Falling
VEN = High, No load
VEN = Low, VL = 0V
VEN = High, VIN = 6.0V to 24.0V, TA = 25°C
VIN = 24.0V, VEN = Low
VIN = 6.0V to 24.0V
Pull-Up
Pull-Down
Pull-Up
Pull-Down
Current Limit Triggered
From Enable to Output Regulation
Min
6.0
3.0
0.8
0.591
70
-1.0
350
2.5
-1.0
Typ
300
0.600
1.0
100
85
100
5.0
1.7
5.0
1.7
490
100
2.5
135
15
Max
24.0
5.0
5.5
0.609
30
130
1.0
650
0.6
1.0
Units
V
V
mV
V
V
V
mA
μA
mV
μA
%
ns
Ω
Ω
kHz
kHz
ms
°C
°C
V
V
μA
1. The AAT1185 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.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
4
202001A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • May 31, 2012

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AAT1185 전자부품, 판매, 대치품
Typical Characteristics
Circuit of Figure 4, unless otherwise specified.
Step-Down Controller Switching Frequency
vs. Input Voltage
(VOUT = 3.3V; IOUT = 10A)
5
4
3
2
1
0
-1
-2
-3
-4
-5
6 8 10 12 14 16 18 20 22 24
Input Voltage (V)
No Load Step-Down Controller
Input Current vs. Input Voltage
(VEN = VIN)
0.60
0.55
0.50
0.45
0.40
0.35
0.30
6
85°C
25°C
-40°C
9 12 15 18 21 24
Input Voltage (V)
DATA SHEET
AAT1185
High Voltage Step-Down Controller
Step-Down Controller Switching Frequency
vs. Temperature
(VIN = 12V; VOUT = 3.3V; IOUT = 10A)
510
500
490
480
470
-40
-20
0 20 40 60 80 100
Temperature (°C)
Step-Down Controller Current Limit
(VIN = 12V; VOUT = 3.3V; L = 3.9µH)
4
2
0 12V
20
10
0
Time (400µs/div)
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
202001A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • May 31, 2012
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High Voltage Step-Down Regulator

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