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AAT1184 PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 AAT1184
기능 High Voltage Step-Down Regulator
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AAT1184 데이터시트, 핀배열, 회로
SwitchRegTM
General Description
The AAT1184 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 1.2A 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 AAT1184 is available in the Pb-free, low profile
12-pin TSOPJW package. The rated operating tempera-
ture range is -40°C to 85°C.
PRODUCT DATASHEET
AAT1184
High Voltage Step-Down Regulator
Features
VIN = 6.0 to 24.0V
VOUT Adjustable from 1.5V to 5.5V
IOUT up to 1.2A
• 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 3x3mm TSOPJW-12 Package
• -40°C to 85°C Temperature Range
Applications
• DSL and Cable Modems
• Notebook Computers
• Satellite Set Top Box
• Wireless LAN Systems
Typical Application
VIN
6V - 24V
TSOPJW -12
IN BST
+
C1
25µF
25V
D1
BAS16
C12
1µF
25V
LX
EN
RS
AAT1184
VL
C3
2.2µF
OS
FB
COMP
GND
C2
0.1µF
L1
4.7µH
D2
B340A
R1
2.32K
C4
68nF
C7
330pF
R7
499
R2
24.3K
C5
220pF
C6
56pF
VOUT
5V/1.2A
R4
44.2k
C8
22µF
R5
6.04k
1184.2008.07.1.0
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AAT1184 pdf, 반도체, 판매, 대치품
SwitchRegTM
PRODUCT DATASHEET
AAT1184
High Voltage Step-Down Regulator
Electrical Characteristics1
VIN = 12V; TA = -40°C to 85°C, unless noted otherwise. Typical values are at TA = 25°C.
Symbol
VIN
VUVLO
VOUT
VFB
ΔVLINEREG/
ΔVIN
ΔVLOADREG/
ΔIIN
IQ
ISHDN
VOCP
ILX
DMAX
TON(MIN)
RDSON(H)
FOSC
FFOLDBACK
TSS
TSD
VEN(L)
VEN(H)
IEN
Description
Input Voltage
UVLO Threshold
Output Voltage Range
Output Voltage Accuracy
Feedback Pin Voltage
Line Regulation
Load Regulation
Quiescent Current
Shutdown Current
Over-Current Offset Voltage
LX Pin Leakage Current
Maximum Duty Cycle
Minimum On-Time
Hi Side On-Resistance
Oscillator Frequency
Short Circuit Foldback Frequency
Soft-Start 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
IOUT = 0A to 1.2A
VIN = 6V to 24V, VOUT = 3.3V, IOUT = 1.2A
VIN = 6V to 24V, VOUT = 5.0V, IOUT = 1.2A
VIN = 12V, VOUT = 3.3V, IOUT = 0A to 1.2A
VIN = 12V, VOUT = 5V, IOUT = 0A to 1.2A
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 = 6.0 to 24.0V
VL = 4.5V
Current Limit Triggered
From Enable to Output Regulation
Min Typ
6.0
3.0
1.5
-2.5
0.591
300
0.600
0.02
0.2
0.4
2.5
0.6
80
-1.0
350
100
85
100
70
490
100
2.5
135
15
2.5
-1.0
Max
24.0
5.0
5.5
2.5
0.609
35.0
120
1.0
650
0.6
1.0
Units
V
V
mV
V
V
%
V
%/V
%/A
mA
μA
mV
μA
%
ns
mΩ
kHz
kHz
ms
°C
°C
V
V
μA
1. The AAT1184 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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AAT1184 전자부품, 판매, 대치품
SwitchRegTM
Typical Characteristics
Step-Down Converter Load Transient Response
(IOUT = 0.6A to 1.2A; VIN = 12V; VOUT = 3.3V; COUT = 2x22µF)
1.5
0.6A
1.2A
1.0
0.5
0.0
3.5
3.4
3.3
3.2
3.1
Time (100µs/div)
Step-Down Converter Load Transient Response
(IOUT = 0.6A to 1.2A; VIN = 12V; VOUT = 3.3V; COUT = 2x22µF)
0.9A
1.2A
1.5
1.0
0.5
0.0
3.5
3.4
3.3
3.2
3.1
Time (100µs/div)
Step-Down Converter Line Transient Response
(VIN = 6V to 10V; VOUT = 3.3V; IOUT = 1.2A)
15
10
5
0
3.35
3.30
3.25
Time (100ms/div)
PRODUCT DATASHEET
AAT1184
High Voltage Step-Down Regulator
Step-Down Converter Load Transient Response
(IOUT = 0.6A to 1.2A; VIN = 12V; VOUT = 5V; COUT = 2x22µF)
1.5
0.6A
1.2A
1.0
0.5
0.0
5.1
5.0
4.9
Time (100µs/div)
Step-Down Converter Load Transient Response
(IOUT = 0.9A to 1.2A; VIN = 12V; VOUT = 5V; COUT = 2x22µF)
0.9A
1.2A
1.5
1.0
0.5
0.0
-0.5
5.1
5.0
4.9
Time (100µs/div)
Step-Down Converter Line Transient Response
(VIN = 6V to 10V; VOUT = 5V; IOUT = 1.2A)
15
10
5
0
5.2
5.0
4.8
4.6
Time (100ms/div)
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