參數(shù)資料
型號(hào)： AAT2511
廠(chǎng)商： Advanced Analog Technology,lnc.
英文描述： Dual 600mA, 1MHz Step-Down DC/DC Converter
中文描述： 雙600mA的，1MHz的降壓型DC / DC轉(zhuǎn)換器
文件頁(yè)數(shù)： 9/20頁(yè)
文件大小： 603K
代理商： AAT2511
AAT2511
Dual 600mA, 1MHz Step-Down DC/DC Converter
2511.2006.05.1.4
9
Soft Start
The AAT2511 soft-start control prevents output volt-
age overshoot and limits inrush current when either
the input power or the enable input is applied.
When pulled low, the enable input forces the con-
verter into a low-power, non-switching state with a
bias current of less than 1μA.
Low Dropout Operation
For conditions where the input voltage drops to the
output voltage level, the converter duty cycle
increases to 100%. As 100% duty cycle is
approached, the minimum off-time initially forces
the high side on-time to exceed the 1MHz clock
cycle and reduce the effective switching frequency.
Once the input drops below the level where the out-
put can be regulated, the high side P-channel
MOSFET is turned on continuously for 100% duty
cycle. At 100% duty cycle, the output voltage tracks
the input voltage minus the I*R drop of the high
side P-channel MOSFET R
DS(ON)
.
Low Supply
The under-voltage lockout (UVLO) feature guaran-
tees sufficient V
IN
bias and proper operation of all
internal circuitry prior to activation.
Fault Protection
For overload conditions, the peak inductor current is
limited. Thermal protection disables switching when
the internal dissipation or ambient temperature
becomes excessive. The junction over-temperature
threshold is 140°C with 15°C of hysteresis.
Figure 1: AAT2511 Adjustable Output with
Enhanced Transient Response.
4.7
μ
H
L1
10
μ
F
C1
1.8V
118k
R1
59.0k
R2
100pF
C4
10
μ
H
L2
10
μ
F
C2
2.5V
59.0k
R4
100pF
C5
10
μ
F
C3
V
IN
187k
R3
FB1
2
EN1
1
LX1
11
GND2
7
LX2
8
GND1
10
SGND1
3
VIN1
12
VIN2
9
SGND2
6
FB2
5
EN2
4
AAT2511
U1
0.1
μ
F
C8
相關(guān)PDF資料
PDF描述
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AAT2511_0605 制造商:ANALOGICTECH 制造商全稱(chēng):Advanced Analogic Technologies 功能描述:Dual 600mA, 1MHz Step-Down DC/DC Converter
AAT2511IWP 制造商:ANALOGICTECH 制造商全稱(chēng):Advanced Analogic Technologies 功能描述:Dual 600mA, 1MHz Step-Down DC/DC Converter
AAT2511IWP-AA-T1 制造商:Skyworks Solutions Inc 功能描述:DC TO DC CONVERTER
AAT2512 制造商:未知廠(chǎng)家 制造商全稱(chēng):未知廠(chǎng)家 功能描述:Dual 400mA High Frequency Buck Converter
AAT2512IWP-AA-T1 制造商:Skyworks Solutions Inc 功能描述:DC TO DC CONVERTER
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