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AAT2503IZL-BAA-T1 PDF预览

AAT2503IZL-BAA-T1

更新时间: 2024-02-16 14:03:43
品牌 Logo 应用领域
ANALOGICTECH 稳压器电源电路
页数 文件大小 规格书
23页 1025K
描述
Adjustable 3-Channel Regulator

AAT2503IZL-BAA-T1 技术参数

生命周期:Transferred包装说明:,
Reach Compliance Code:unknown风险等级:5.59
Base Number Matches:1

AAT2503IZL-BAA-T1 数据手册

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AAT2503  
Adjustable 3-Channel Regulator  
SystemPower  
General Description  
Features  
The AAT2503 is a three-channel regulator consist-  
ing of a step-down converter with an input voltage  
range of 2.7V to 5.5V plus two low dropout (LDO)  
linear regulators.  
800mA Step-Down Converter  
— VIN Range: 2.7V to 5.5V  
— VOUT Range: 0.9V to VIN  
— High Efficiency  
— 2MHz Switching Frequency  
Two 150mA Low Dropout Regulators  
— VOUT Range: 0.6V to VIN  
— High Output Accuracy: 1.5ꢀ  
85µA of Total IQ  
Independent Enable Pins  
Integrated Power MOSFETs  
Over-Temperature and Current Limit  
Protection  
QFN34-20 Package  
-40°C to +85°C Temperature Range  
The step-down converter optimizes power efficien-  
cy throughout the load range. Pulling the MODE/  
SYNC pin high enables "PWM Only" mode, main-  
taining constant frequency and low output ripple  
across the operating range. Alternatively, the con-  
verter may be synchronized to an external clock  
input to the MODE/SYNC pin. The step-down con-  
verter delivers up to 800mA of output current, while  
consuming 30µA of typical no load quiescent cur-  
rent. The switching frequency is 2MHz, minimizing  
the size of external components.  
The two LDOs (LDOA/LDOB) have independent  
inputs and are capable of delivering up to 150mA  
each. A Power-OK (POK) function provides an  
open drain output signal when LDOA is within reg-  
ulation. Both LDOs feature low quiescent current  
and a low dropout voltage. The output voltages for  
both LDOs are adjustable to as low as 0.6V. The  
linear regulators have independent Enable pins.  
Applications  
Cellular Phones  
Digital Cameras  
Handheld Instruments  
Microprocessor/DSP Core/IO Power  
PDAs and Handheld Computers  
The AAT2503 is available in a Pb-free 3x4mm  
QFN34-20 package and is rated over the -40°C to  
+85°C temperature range.  
Typical Application  
L1  
LX  
VOUT (Buck)  
AAT2503  
FB  
V
R1  
VIN  
IN  
OUTA  
R3  
100kΩ  
OUTA  
R4  
C2  
10μF  
VLDOA  
VLDOB  
POK  
FBA  
POK  
OUTB  
C6  
VP  
OUTB  
FBB  
R5  
R8  
C5  
2.2μF  
R7  
R2  
MODE/SYNC  
ENA  
2.2μF  
PGND  
AGND  
ENB  
EN  
2503.2007.04.1.1  
1

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