參數(shù)資料
型號(hào)： AAT2505IWP-AQ-T1
廠商： Advanced Analogic Technologies, Inc.
英文描述： Dual Channel, Step-Down Converter/Linear Regulator
中文描述： 雙通道，降壓轉(zhuǎn)換器/線性穩(wěn)壓器
文件頁(yè)數(shù)： 1/26頁(yè)
文件大?。?/td> 854K
代理商： AAT2505IWP-AQ-T1
General Description
The AAT2505 is a member of AnalogicTech's Total
Power Management IC (TPMIC) product fam-
ily. It is a low dropout (LDO) linear regulator and a
step-down converter with an input voltage range of
2.7V to 5.5V, making it ideal for applications with
single cell lithium-ion / polymer batteries.
The LDO has an independent input pin and is capa-
ble of delivering up to 300mA of current. The linear
regulator has been designed for high-speed turn-on
and turn-off performance, fast transient response,
and good power supply rejection ratio (PSRR).
Other features include low quiescent current, low
dropout voltage, and a Power-OK (POK) open drain
output signaling when V
OUT
is in regulation.
The 600mA step-down converter is designed to
operate with 1.4MHz of switching frequency, mini-
mizing external component size and cost while
maintaining a low 27μA no load quiescent current.
Peak current mode control with internal compen-
sation provides a stable converter with a low equiv-
alent series resistance (ESR) ceramic output
capacitor for extremely low output ripple.
For maximum battery life with high voltage outputs,
the step-down converter duty cycle increases to
100%. The output voltage is either fixed or adjustable
with an integrated P- and N-channel MOSFETpower
stage and 1.4MHz switching frequency.
The AAT2505 is available in a Pb-free, 12-pin
TDFN33 package and is rated over a temperature
range of -40°C to +85°C.
Features
V
IN
Range: 2.7V to 5.5V
300mA LDO
— 400mV Dropout Voltage at 300mA
— High Accuracy: ±1.5%
— Fast Line / Load Transient Response
— Power OK Output
600mA Step-Down Converter
— Up To 98% Efficiency
— 27μA No Load Quiescent Current
— Shutdown Current <1μA
— Low R
DS(ON)
Integrated Power Switches
— Fast Turn-On Time (150μs Typical)
— Low Dropout 100% Duty Cycle
— 1.4MHz Switching Frequency
— Internal Soft Start
Over-Temperature and Current Limit
Protection
TDFN33-12 Package
-40°C to +85°C Temperature Range
Applications
Cellular Phones
Digital Cameras
Handheld Instruments
Microprocessor/DSP Core/IO Power
PDAs and Handheld Computers
Portable Media Players
AAT2505
Dual Channel, Step-Down
Converter/Linear Regulator
Typical Application
Efficiency
(V
OUT
= 2.5V; L = 6.8μH)
Output Current (mA)
E
60
70
80
90
100
0.1
1
10
100
1000
V
IN
= 3.3V
6.8μH
L1
C1
4.7μF
2.2μF
C4
10μF
C3
R3 100k
Ω
PGND
1
LX
2
VP
3
VCC
4
ENLDO
9
EN
10
FB
11
SGND
12
VLDO
5
OUT
6
GND
8
POK
7
AAT2505
U1
L1 Sumida CDRH3D16-4R7
C1 Murata GRM219R61A475KE19
C3 Murata GRM21BR60J106KE19
V
IN
= 2.7V to 5.5V
3.3V at 300mA
2.5V at 600mA
2505.2006.06.1.1
1
SystemPower
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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AAT2506IWP-AI-T1 制造商:ANALOGICTECH 制造商全稱(chēng):Advanced Analogic Technologies 功能描述:1MHz Step-Down Converter/LDO Regulator
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