TRIPLE-CHANNEL CONTROLLER Features Complete Power Control Circuit
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AAT1100
TRIPLE-CHANNEL CONTROLLER
Features Complete Power Control Circuitry Precision Reference1.25V±1% Operating Voltage2.5V Under-voltage Lockout Protection Totem Pole Output Output Short Circuit Protection Dissipation Current 2.5mA (f=500kHz, Duty=50%) Separated Control Ch-1, pair Ch-2 (see function table) Dead Time Control0 100% Wide Operating Frequency50kHz 1MHz Minimized External Components Configuration General Description AAT1100 provides integrated triple-channel pulse-width-modulation (PWM) solution power supply DC-DC system, this device offers systems engineer flexibility tailor power supply circuitry specific application. Each channel contains error amplifier, comparator, dead-time control output driver. under-voltage protection, oscillator, short circuit protection voltage reference circuit common three channels. AAT1100 contains boost exclusive circuits (Ch-1,3) buck-boost exclusive circuit (Ch-2). Dead-time control (DTC) provide 100% dead time resistive divider network. Soft start implemented paralleling resistor with capacitor. dead time control inputs assigned Ch-1,3 pair Ch-2 individually, dead time control inputs used control operation. With minimum number external components, AAT1100 offers simple cost effective solution. this device operate from 2.5V 7.0V supply voltages achieve efficient operation power system.
*Spec subject change without notice this document.
VIEW
DTC2 DTC13
OUT2 OUT3 OUT1
VREF
(TSSOP-16 PACKAGE)
Advanced Analog Technology, Inc.
January 2004
AAT1100
Function Table Condition Ch-1 DTC13 0.3V, DTC2 0.3V DTC13 0.3V, DTC2 0.2V DTC13 0.2V, DTC2 0.3V DTC13 0.2V, DTC2 0.2V Description Name OUT2 OUT3 OUT1 VREF DTC13 DTC2 Output Ch-2 Ch-3
Description Negative input (Error Amplifier Feedback input Supply voltage Channel output Channel output Channel output Ground Short circuit protect Reference voltage output Dead time control channel Dead time control channel Frequency setting capacitor resistor input Feedback input Negative input Negative input Feedback input
Advanced Analog Technology, Inc.
January 2004
AAT1100
Absolute Maximum Ratings CHARACTERISTICS Supply voltage Input voltage (IN-, DTC) Output voltage SYMBOL VALUE UNIT
Output current
Ch-1,3 Ch-2
+0.3 -41/+21 -21/+41 +200 -200
Output peak current Sink Duty10%) Source Duty10%) Operating free-air temperature range Storage temperature range
opeak
Tope Tstg
Recommended Operating Conditions
Supply voltage, Input voltage, IN1, Input voltage, Output voltage capacitor resistor (Note Oscillator frequency Output current, Iout1, Iout3 Output current, Iout2 Output current error amplifier Operating free-air temperature
Symbol VI13
0.95
1.55
Unit
Tope
1800 1000 -40/+20 -20/+40
Note rise fall times oscillator wave form will equal resistor )=7ktheoretically.
Advanced Analog Technology, Inc.
January 2004
AAT1100
Electrical Characteristics, 3.3V (Unless Otherwise Specified) (See Note Oscillator Parameter Test Condition Frequency 130pF,
Unit
level output voltage level output voltage Frequency change with
VOSCH VOSCL
130pF, 130pF, 2.5V 130pF,
0.95 0.35
1.00 0.40
1.05 0.45
Frequency change with Output source current
Under-voltage Protection
Parameter
-180
-200
-220
Test Condition
Unit
Upper threshold voltage Lower threshold voltage Hysteresis VUPH VUPL
Short Circuit Protection Control
Parameter
VUPH VUPL VHYS
Test Condition
Unit
Input threshold voltage Latch reset voltage Short-circuit detect threshold voltage terminal source current
Ch-1, Ch-2
1.10 0.20 1.20 -1.4
1.15 0.25 1.25 -2.0
1.20 0.30 1.30 -2.6
Note Typical values parameters except
VREF (dev) specified
Advanced Analog Technology, Inc.
January 2004
AAT1100
Electrical Characteristics, 3.3V (Unless Otherwise Specified) (See Note (continued) Reference Voltage
Parameter Test Conditions
Unit
Reference voltage Short-circuit output current Input voltage regulation Output regulation Reference voltage change with temperature
(Error Amplifier)
Parameter
VREF
-1mA VREF -1mA 2.5V -0.1mA -1mA -1mA (Note
1.237 1.250 1.263
Test Condition
Input offset voltage Input bias current
Ch-1,3, AV=1 Ch-1,3, 0.95V 1.55V Ch-2, 0.4V 1.0V Ch-1,3 Ch-2 200k 0.95 0.1V -60µA -0.1V 0.2mA -0.1V 0.2V 0.1V 1.2V Ch-2, Ch-2,
Unit
1.55
Input voltage range Open-loop voltage amplification Unity-gain bandwidth Output voltage swing
-100
Output sink current Output source current Input bias voltage
Note deviation parameter
(dev) defined difference maximum minimum values
obtained over recommended free-air temperature range (-20 oC).
Advanced Analog Technology, Inc.
January 2004
AAT1100
Electrical Characteristics, 3.3V (Unless Otherwise Specified) (See Note (continued) Dead Time Control Parameter Test Condition Unit Input bias current BDT1/ VDTC1, 0.35V 1.05V
Input threshold voltage (DTC Input threshold voltage (DTC2) Channel threshold voltage
Output Stage
Parameter
VDTC 0.35V 1.05V Duty 500kHz
0.25
V13d
V13d100 Duty 100%, 500kHz d100 Duty 500kHz Duty 100%, 500kHz
Test Condition
High-level output voltage Low-level output voltage Rise time Fall time
Operating Current
Parameter
Trise Tfall
-20mA (Ch-2) -40mA (Ch-1,3) 20mA (Ch-1,3) 40mA (Ch-2) 1000pF 1000pF
3.05
Unit
Test Condition
Supply current
DD-OFF DD-ON
Output "OFF"state 500kHz, Duty 50%, load
Unit
Advanced Analog Technology, Inc.
January 2004
AAT1100
Function Block Diagram
atch
atch
atch
VREF
UVLO
UVCN atch
EN13
TC13
UVCN
DTC2
UVCN
voltage current values block diagram nominal.
Advanced Analog Technology, Inc.
January 2004
AAT1100
Application Circuit
OUT1
OUT3
1100
VREF OUT2
TC13 DTC2
Advanced Analog Technology, Inc.
January 2004
AAT1100
Timing Chart
0.4V
1.15
tion
ircu otec 25*C (sec)
Advanced Analog Technology, Inc.
January 2004
AAT1100
Timing Chart
Vref
DTC2
DTC2
0.25
illa illu
Advanced Analog Technology, Inc.
January 2004
AAT1100
Package Dimension (Unit: Mil)
Advanced Analog Technology, Inc.
January 2004
AAT1100
******************** NOTE: Controlling dimension Dimension does include mold flash, burrs gate burrs. Mold flush, burrs gate burrs shall exceed 0.006"[0.15mm] end. Dimension "E1" does include interlead flash. interlead flash shall exceed 0.010"[0.25mm] side. Dimension does include dambar protrusion. Allowable dambar protrusion shall 0.003"[0.08mm] total excess dimension maximum material condition. dambar cannot located lower radius foot. Minimum space between protrusion adjacent lead 0.0028"[0.07mm] Tolerance: 0.010"[0.25mm] unless otherwise specified. Otherwise dimension follow acceptable spec. ********************
Advanced Analog Technology, Inc.
January 2004
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