Document
Advanced Analog Technology, Inc.
AAT1106
Preliminary and Provisional
2-CHANNEL STEP-UP PWM CONTROLLERS
Features z Complete www.DataSheet4U.com z z z z z z z PWM Power Control Circuitry Under-voltage Lockout Protection Totem pole Output Output Short Circuit Protection Dead Time Control¡G 0 to 100% Wide Operating Frequency¡G 10kHz to 800kHz Shut Down Control Power Good Protection General Description The AAT1106 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 AAT1106 contains two boost (step-up) exclusive circuit. 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. With a minimum number of external components, the AAT1106 series offers a simple and cost effective solution.
Pin Configuration
TOP VIEW
CT RT SHDN INV1 FB1 DTC1 OUT1 GND 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 Vref SCP PRDB INV2 FB2 DTC2 OUT2 VDD
(TSSOP-16 PACKAGE)
*Spec is subject to change without notice in this document.
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Advanced Analog Technology, Inc.
AAT1106
Pin Description Pin # Name 1 2 3 www.DataSheet4U.com 4 5 6 7 8 9 10 11 12 13 14 15 16 CT RT SHDN INV1 FB1 DTC1 OUT1 GND VDD OUT2 DTC2 FB2 INV2 PRDB SCP Vref I/O I External timing capacitance I External timing resistance I Shut down input pin¡] internal pull "H"¡^ Description
I Negative input for error amplifier 1 I Output for error amplifier 1 I Output 1 dead time / soft start setting O Output 1 Ground I Power supply O Output 2 I Output 2 dead time / soft start setting I Output for error amplifier 2 I Negative input for error amplifier 2 I Power good output pin I Timer latch setting O Reference voltage (2.505V) output
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Advanced Analog Technology, Inc.
AAT1106
Absolute Maximum Ratings CHARACTERISTICS Supply voltage Input voltage (IN-, DTC, SHDN) Output voltage
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SYMBOL VDD VI VO
VALUE 7
VDD VDD +0.3 -120/+120 -20 to 85 -65 to 150 500
UNIT V V V
Output current Operating free-air temperature range Storage temperature range Power dissipation
IO
Tope Tstg
mA
o o
C C
Pd
mW
Recommended Operating Conditions
Supply voltage, VDD Input voltage, INV1, INV2 Output voltage OSC capacitor OSC resistor (Note 1) Oscillator frequency Output current, Iout1, Iout2 Operating free-air temperature
Symbol VDD Vcm VO
Min 4.0 0.5 0
CT RT f OSC
100 5.1 10 -20
Max 6.5 1.6 VDD 15000 50 800
Unit V V V
pF kΩ kHz mA
o
IO
Tope
+50/-50 85
C
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Advanced Analog Technology, Inc.
AAT1106
Electrical Characteristics, VDD = 5.0V (Unless Otherwise Specified) (See Note 1) Oscillator
Parameter Test Condition
Frequency Frequency change with VDD
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f OSC f dV
C T = 220pF, R T = 10kΩ VDD = 4.0V to 6.0V, TA = 25 oC C T = 220pF, R T = 10kΩ
Min 320
Typ 400
Max Unit 480 KHz
1
%
Under-voltage Protection
Parameter Test Condition Min Typ Max Unit
Upper threshold voltage Lower threshold voltage Hysteresis ( VUPH – VUPL )
Short Circuit Protection Control
Parameter
VUPH VUPL VHYS
TA = 25 C TA = 25 oC TA = 25 oC
o
2.6 2.23
2.9 2.53 0.37
3.2 2.83
V V V
Test Condition
Min
Typ
Max
Unit
Input threshold voltage Short-circuit detect threshold voltage SCP terminal source current Standy Voltage Latch Voltage
Shun Down Control¡]
Vr1
Ch-1, 2
2.1 1.48 -1.5
2.4 1.64 -2.5 50 30
2.65 1.8 -3.5 100 100
Vr 2
I SCP VSTB VLT
V V µA mV mV
Internal pull "H"¡^
Test Condition Min Typ Max Unit
Parameter
Shut down enable voltage Shut down release voltage
VsdL VsdH
TA = 25 C TA = 25 oC 2.0
o
0.5
V V
Note1 : Typical values of all parameters are specified at
TA =25 oC.
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Advanced Analog Technology, Inc.
AAT1106
Electrical Characteristics, VDD = 5.0V (Unless Otherwise Specified) (See Note 1) (continued) Reference Voltage
Parameter Test Conditions Min
o
Typ
Max
Unit
Internal reference Voltage Reference voltage
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Vrefi VREF VRI VRO
I REF = −1mA , TA = 25 C 1.220 I REF = −1mA , TA = 25 oC I REF = −1mA , VDD = 4.0V to 6.0V I REF = −0.1mA to -1mA
1.233 1.246
2.430 2.505 2.580 1 1 5
V mV mV
Input voltage regulation Output regulation
EA (Error Amplifier)
Parameter Test Condition
Min.