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PDF AAT1100 Data sheet ( Hoja de datos )
| Número de pieza | AAT1100 | |
| Descripción | TRIPLE-CHANNEL PWM CONTROLLER | |
| Fabricantes | Advanced Analogic Technologies | |
| Logotipo |  |
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Advanced Analog Technology, Inc.
AAT1100
Product information presented is current as of publication date. Details are subject to change without notice
TRIPLE-CHANNEL PWM CONTROLLER
Features
z Complete PWM Power Control Circuitry
z Precision Reference 1.25V±1% (25 oC)
z Low Operating Voltage 2.5V to 7.0V
z Under-Voltage Lockout Protection
z Totem Pole Output
z Output Short Circuit Protection
z Low Dissipation Current
2.5mA at 500 kHz and 50% Duty Cycle
z Separate On / Off Control for CH1, CH3 Pair
and CH2 (Refer to Function Table)
z Dead Time Control 0 to 100%
z Wide Operating Frequency 50 kHz to 1MHz
z Minimized External Components
Pin Configuration
IE2
OE 2
VDD
OUT2
OUT3
TOP VIEW
1 16 OE3
2 15 IE3
3 14 IE1
4 13 OE 1
5 12 OSC
OUT1
6
11 DTC2
GND 7
10 DTC13
SCP 8
9 VREF
(TSSOP-16 PACKAGE)
General Description
The AAT1100 provides an integrated triple-channel
pulse-width-modulation (PWM) solution for the
power supply of DC-DC system; this device offers
system engineer the flexibility to custom-make the
power supply circuitry to a specific application.
Each channel contains its own error amplifier,
PWM comparator, dead–time control (DTC) and
output driver. The under-voltage protection,
oscillator, short circuit protection and voltage
reference circuit are common features of the three
channels.
The AAT1100 contains two boost circuits (CH1,
CH3) and a buck-boost circuit (CH2). DTC can be
set to provide 0% to 100% dead-time through a
divider network. Soft-Start can be implemented by
paralleling the DTC resistor with a capacitor. Two
DTC inputs are assigned for CH1, CH3 pair and
CH2 individually, and DTC inputs can be used to
control on / off operation. In addition, this device
can operate from 2.5V to 7.0V supply voltages to
achieve efficient operation in low power system.
With a minimal number of external components, the
AAT1100 offers a simple and cost effective
solution.
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– Advanced Analog Technology, Inc. –
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Advanced Analog Technology, Inc.
AAT1100
Electrical Characteristics, VDD = 3.3V; TC = 25 oC (Unless Otherwise Specified)
(Cont.)
Reference Voltage
Parameter
Test Conditions
Min Typ Max Unit
Reference Voltage
VREF IREF = −1mA
1.237 1.250 1.263 V
Short Circuit Output Current IOS VREF = 0
− 2 − 10 − 30 mA
Input Voltage Regulation
Output Regulation
Reference Voltage Change
with Temperature
VRI
IREF = −1mA ,
VDD = 2.5V to 7V
VRO IREF = −0.1mA to − 1mA
VR∆ IREF = −1mA (Note 3)
2 5 mV
1 5 mV
15 25 mV
EA (Error Amplifier)
Parameter
Input Offset Voltage
Input Bias Current
Input Voltage Range
Open-Loop Voltage Gain
Unity-Gain Bandwidth
Output Voltage Swing
Output Sink Current
Output Source Current
Input Bias Voltage
VIO
I IB
VIR
A VO
BW1
VOS+
VOS−
IOS+
IOS−
Vr 5
Test Condition
CH1,CH3, Unity Gain
CH1,CH3, VI13 = 0.95V
to 1.55V
CH2, VI2 = 0.4V to 1.0V
CH1, CH3
CH2
R OE = 200 kΩ
∆VI = +0.1V ,
IO = −60µA
∆VI = −0.1V ,
IO = 0.2mA
∆VI = −0.1V ,
VO = 0.2V
∆VI = +0.1V ,
VO = 1.2V
CH2, Unity Gain,
TC = 25 oC
CH2, Unity Gain
Min Typ Max Unit
15 mV
±10 ±20 nA
±10 ±20
0.95
0.4
1.55
1.0
V
60 dB
1 MHz
1.2
V
0.2
0.2 1.0
mA
− 60 − 100
µA
678 700 722 mV
665 700 735
Note 3: The parameter VR∆ is defined as the difference between the maximum and minimum values obtained over the
recommended temperature range (-20 oC to 85 oC).
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– Advanced Analog Technology, Inc. –
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Advanced Analog Technology, Inc.
Package Dimension
16-PIN TSSOP
AAT1100
––
– Advanced Analog Technology, Inc. –
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11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet AAT1100.PDF ] | |
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