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AAT1108 PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 AAT1108
기능 2-CHANNEL STEP-UP PWM CONTROLLERS
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AAT1108 데이터시트, 핀배열, 회로
Advanced Analog Technology, Inc.
Preliminary and Provisional
AAT1108
2-CHANNEL STEP-UP PWM CONTROLLERS
WITH ADJUSTABLE LDO
www.DataShFeeeat4tUu.croems
z Complete PWM Power Control Circuitry
z Adjustable LDO Regulator
z Under-voltage Lockout Protection
z Totem pole Output
z Output Short Circuit Protection
z Dead Time Control 0 to 100%
z Wide Operating Frequency
10kHz to 800kHz
Pin Configuration
TOP VIEW
CT 1
16 Vref
RT 2
15 SCP
INV3 3
14 OUT3
INV1 4
13 INV2
FB1 5
12 FB2
DTC1 6
11 DTC2
OUT1 7
10 OUT2
GND 8
9 VDD
(TSSOP-16 PACKAGE)
General Description
The AAT1108 series provides an integrated
two-channel pulse-width-modulation (PWM)
solution for the power supply of DC-DC system,
this device offers the systems engineer the
flexibility to tailor the power supply circuitry to a
specific application. Each channel contains its own
error amplifier, PWM comparator, dead–time
control and output driver. The under-voltage
protection, oscillator, short circuit protection and
voltage reference circuit are common for the two
channels.
The AAT1108 contains two boost (step-up)
exclusive circuits. Dead-time control (DTC) can be
set to provide 0% to 100% dead time by resistive
divider network. Soft start can be implemented by
paralleling the DTC resistor with a capacitor. Two
dead time control inputs are assigned for Ch-1 and
Ch-2 individually, and dead time control inputs can
be used to control on / off operation.
The maximum output currents of LDO regulator
can be enlarged by connect a N_MOS FET (or NPN
bipolar) as a source follow stage at out3 pin.
*Spec is subject to change without notice in this document.
––
Advanced Analog Technology, Inc.
V 0.1




AAT1108 pdf, 반도체, 판매, 대치품
Advanced Analog Technology, Inc.
AAT1108
Electrical Characteristics, VDD = 5.0V (Unless Otherwise Specified) (See Note 1)
Oscillator
Parameter
Frequency
Frequency change with VDD
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Test Condition
fOSC CT = 220pF, R T = 10k
fdV VDD = 4.0V to 6.0V,
TA = 25 oC
CT = 220pF, R T = 10k
Min Typ
320 400
1
Max Unit
480 KHz
%
Under-voltage Protection
Parameter
Upper threshold voltage
Lower threshold voltage
Hysteresis ( VUPH – VUPL )
VUPH
VUPL
VHYS
Test Condition
TA = 25 oC
TA = 25 oC
TA = 25 oC
Min Typ Max Unit
2.6 2.9 3.2 V
2.23 2.53 2.83 V
0.37 V
Short Circuit Protection Control
Parameter
Input threshold voltage
Short-circuit detect threshold
voltage
SCP terminal source current
Standy Voltage
Latch Voltage
Vr1
Vr 2
ISCP
VSTB
VLT
Test Condition
Ch-1, 2
Min Typ Max Unit
2.1 2.4 2.65 V
1.48 1.64 1.8 V
-1.5 -2.5 -3.5 µA
50 100 mV
30 100 mV
Note1: Typical values of all parameters are specified at TA =25 oC.
––
Advanced Analog Technology, Inc.
V 0.1

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AAT1108 전자부품, 판매, 대치품
Advanced Analog Technology, Inc.
Function Block Diagram
AAT1108
www.DataSheet4U.com
––
Advanced Analog Technology, Inc.
V 0.1

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