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Teilenummer | AAT1105A |
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Beschreibung | BUCK BOOST AND BOOST PWM CONTROLLER | |
Hersteller | Advanced Analog Technology | |
Logo | ||
Gesamt 16 Seiten 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.
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– Advanced Analog Technology, Inc. –
Page 1 of 16
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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 DD−OFF
I DD−ON
Test Condition
Output “OFF” State
R OSC = 10kΩ
Min Typ Max Unit
- 1.8 - mA
- 2.0 - mA
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– Advanced Analog Technology, Inc. –
Page 6 of 16
V 1.0
6 Page Advanced Analog Technology, Inc.
Package Dimension
16-Pin TSSOP
AAT1105A
www.DataSheet4U.com
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– Advanced Analog Technology, Inc. –
Page 12 of 16
V 1.0
12 Page | ||
Seiten | Gesamt 16 Seiten | |
PDF Download | [ AAT1105A Schematic.PDF ] |
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