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AAT1105A Schematic ( PDF Datasheet ) - Advanced Analog Technology

Teilenummer AAT1105A
Beschreibung BUCK BOOST AND BOOST PWM CONTROLLER
Hersteller Advanced Analog Technology
Logo Advanced Analog Technology Logo 




Gesamt 16 Seiten
AAT1105A Datasheet, Funktion
Advanced Analog Technology, Inc.
AAT1105A
Details are subject to change without notice.
BUCK_BOOST & BOOST PWM CONTROLLER
Features
www.DataShzeet4UC.coomm plete PWM Power Control Circuitry
CH1: Buck_Boost, CH2: Boost
z Under-Voltage Lockout (UVLO) Protection
z Totem Pole Output
z Output Short Circuit Protection
z Dead-Time Control 0% to 100%
z Wide Operating Frequency
10kHz to 800kHz
z Shutdown Control
z Power Good Protection
z VDD Range: 2.6V~6.5V
Pin Configuration
TOP VIEW
Ct
Rt
SHDN
IE1
OE1
1
2
3
4
5
16 VREF
15 SCP
14 PGO
13 IE2
12 OE2
DTC1 6
11 DTC2
OUT1
GND
7
8
10 OUT2
9 VDD
(TSSOP-16 PACKAGE)
General Description
The AAT1105A provides an integrated two-channel
pulse-width-modulation (PWM) solution for the
power supply of DC-DC system. This device
offers system engineers the flexibility to tailor-make
the power supply circuitry for specific applications.
Each channel contains its own error amplifier,
PWM comparator, dead–time control (DTC), and
output driver. The under-voltage protection,
oscillator, short circuit protection (SCP) and voltage
reference circuit are the common features for the
two channels.
The AAT1105A contains one step-up (boost) circuit
at channel two (CH2) and one inverting
(buck_boost) circuit at channel one (CH1).
Dead-time control can be set to provide 0% to
100% dead-time through a resistive divider network.
Soft-start can be implemented by paralleling the
DTC resistor with a capacitor. Two dead-time
control inputs are assigned for CH1 and CH2
individually, and dead-time control inputs can be
used to control on / off operation.
The compact design and optimized external parts of
AAT1105A offers a simple and effective solution.
––
Advanced Analog Technology, Inc.
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AAT1105A Datasheet, Funktion
Advanced Analog Technology, Inc.
AAT1105A
Electrical Characteristics, VDD = 3.3V (Unless Otherwise Specified) (See Note 1) (Cont.)
Dead Time Control & PWM
Parameter
Test Condition
Min Typ Max Unit
Input Bias Current
IIB VDTC = 1.0V
- 0.1 1.0 µA
Input Threshold
www.DataSheet(4DU.TcoCm1)
Voltage
V1d 0
V1d100
Duty = 0%, fOSC = 10kHz
Duty = 100%,
fOSC = 10kHz
0.92 1.00 1.08
0.48 0.56 0.64
V
Input Threshold
(DTC2)
Voltage
V2d0
V2d100
Duty = 0%, fOSC = 10kHz
Duty = 100%,
fOSC = 10kHz
0.48 0.56 0.64
0.92 1.00 1.08
V
Latch Input Voltage (DTC1) V1DTC IDTC = 20µA
1.15 1.20 - V
Latch Input Voltage (DTC2) V2DTC IDTC = 50µA
- 0.2 0.4 V
Latch Mode Source Current
(DTC1)
I1DTC DTC1=1.08V
- 45 30 µA
Latch Mode Source Current
(DTC2)
I2DTC DTC2=0.48V
150 200 - µA
Output Stage
Parameter
High-Level Output Voltage
Low-Level Output Voltage
Rise Time
Fail Time
Leakage Current
Capacitance at the Output
Pin
VOH
VOL
t RISE
t FALL
I LEAK
CL
Test Condition
IO = 50 mA
IO =+50mA
CL =1,000pF
CL =1,000pF
VO =6.0V
Min Typ Max Unit
1.8 2.2 - V
- 0.8 1.2 V
- 100 - ns
- 100 - ns
- - 5 µA
Operating Current
Parameter
Supply Current
I DDOFF
I DDON
Test Condition
Output “OFF” State
R OSC = 10k
Min Typ Max Unit
- 1.8 - mA
- 2.0 - mA
––
Advanced Analog Technology, Inc.
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AAT1105A pdf, datenblatt
Advanced Analog Technology, Inc.
Package Dimension
16-Pin TSSOP
AAT1105A
www.DataSheet4U.com
––
Advanced Analog Technology, Inc.
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V 1.0

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