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AAT1346A Schematic ( PDF Datasheet ) - Advanced Analog Technology

Teilenummer AAT1346A
Beschreibung 2A 15V Step-Down DC-DC Converter
Hersteller Advanced Analog Technology
Logo Advanced Analog Technology Logo 




Gesamt 12 Seiten
AAT1346A Datasheet, Funktion
Advanced Analog Technology, Inc.
June 2008
AAT1346A/B/C
Product information presented is for internal use within AAT Inc. only. Details are subject to change without notice
2A 15V Step-Down DC-DC Converter
FEATURES
Buck PWM with Internal PMOS
4.5V to 15.0V Input Voltage Range
Max. 2A Output Current
Under-Voltage Lockout (UVLO) Protection
Internal Short Circuit and Thermal Protection
Internal Soft-Start
Fixed Switching Frequency (380kHz / 47kHz)
2 µA Shutdown Current
SOP- 8 Package
PIN CONFIGURATION
GENERAL DESCRIPTION
The AAT1346A/B/C is a 2A 15V step-down converter,
which provides an integrated one-channel PWM
solution for the power supply of DC-DC system. It
offers system engineers the flexibility to tailor-make the
power supply circuitry for specific applications.
The buck PWM contains enable control signal, error
amplifier, PWM comparator, output driver,
under-voltage protection, oscillator, short circuit
protection and voltage reference circuit.
The AAT1346A/B/C contains one buck current mode
PWM with internal PMOS. In addition, a digital
soft-start is also included to prevent inrush current at
startup. AAT1346A/B/C comes with a fixed 380kHz
oscillator, however, when the feedback voltage is lower
than 0.7V, the switching frequency changes to 47kHz
and returns to 380kHz after the short-circuit is
released.
TYPICAL APPLICATION
Power In
VDD
EO SW
VOUT
ENC
IN
ENC
GND
台灣類比科技股份有限公司
Advanced Analog Technology, Inc.
Version 1.00
Page 1 of 12






AAT1346A Datasheet, Funktion
Advanced Analog Technology, Inc.
TYPICAL OPERATING CHARACTERISTICS (CONT.)
( VIN =12V, TC =25 C Unless Otherwise Noted)
June 2008
AAT1346A/B/C
台灣類比科技股份有限公司
Advanced Analog Technology, Inc.
Version 1.00
Page 6 of 12

6 Page









AAT1346A pdf, datenblatt
Advanced Analog Technology, Inc.
PACKAGE DIMENSION
SOP- 8
June 2008
AAT1346A/B/C
Symbol
A
A1
A2
b
C
D
E
E1
e
L
y
θ
Dimensions In Millimeters
MIN TYP MIN
1.35 1.60 1.73
0.05 ------ 0.15
------ 1.45 ------
0.33 0.41 0.51
0.19 0.20 0.25
4.80 4.85 4.95
5.79 5.99 6.20
3.81 3.91 3.99
1.27 BSC
0.406
0.710
1.270
------
------
0.076
0˚ ------ 8˚
台灣類比科技股份有限公司
Advanced Analog Technology, Inc.
Version 1.00
Page 12 of 12

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