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參數(shù)資料
| 型號(hào)： | AAT1156 |
| 廠商： | Advanced Analog Technology,lnc. |
| 元件分類： | DC/DC變換器 |
| 英文描述： | 1MHz 700mA Step-Down DC-DC Converter |
| 中文描述： | 1MHz的700mA的降壓型DC - DC轉(zhuǎn)換器 |
| 文件頁(yè)數(shù)： | 1/15頁(yè) |
| 文件大小： | 586K |
| 代理商： | AAT1156 |
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AAT1156
1MHz 700mA Step-Down DC-DC Converter
1156.2007.01.1.4
1
SwitchReg
General Description
The AAT1156 SwitchReg is a step-down switching
converter ideal for applications where high efficien-
cy is required over the full range of load conditions.
The 2.7V to 5.5V input voltage range makes the
AAT1156 ideal for single-cell lithium-ion/polymer
battery applications. Capable of more than 700mA
with internal MOSFETs, the current-mode con-
trolled IC provides high efficiency over a wide oper-
ating range. Fully integrated compensation simpli-
fies system design and lowers external parts count.
The AAT1156 is available in a Pb-free, 16-pin,
3x3mm QFN package and is rated over the -40°C
to +85°C temperature range.
Features
V
IN
Range: 2.7V to 5.5V
Up to 95% Efficiency
110m
Ω
R
DS(ON)
Internal Switches
<1
μ
A Shutdown Current
1MHz Step-Down Switching Frequency
Fixed or Adjustable V
OUT
≥
0.8V
Integrated Power Switches
Current Mode Operation
Internal Compensation
Stable with Ceramic Capacitors
Internal Soft Start
Over-Temperature Protection
Current Limit Protection
16-Pin QFN 3x3mm Package
-40°C to +85°C Temperature Range
Applications
Cellular Phones
Digital Cameras
MP3 Players
Notebook Computers
PDAs
Wireless Notebook Adapters
Typical Application
Efficiency vs. Load Current
(V
OUT
= 2.5V; L = 4.7μH)
Output Current (mA)
E
50
55
60
65
70
75
80
85
90
95
100
1
10
100
1000
V
IN
= 3.0V
V
IN
= 3.6V
V
IN
= 4.2V
4.7
μ
H
L1
2 x 22
μ
F
C3, C4
10
μ
F
C1
100
R1
0.1
μ
F
C2
C1 Murata 10
μ
F 6.3V X5R GRM42-6X5R106K6.3
C3-C4 MuRata 22
F 6.3V GRM21BR60J226ME39L X5R 0805
L1 Sumida CDRH3D16-4R7NC
2.5V
INPUT
187k
59k
R4
LX
LL
EN
VCC
VP
NC
LX
PGND
VP
VP
FB
LX
PGND
PGND
SGND
NC
AAT1156
U1
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|---|---|
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