Preliminary Provisional 2-CHANNLE SWITCHING REGULATOR Featur
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AAT1343
Preliminary Provisional
2-CHANNLE SWITCHING REGULATOR
Features Complete Power Control Circuitry Precision Reference2.5V±1% Under-voltage Lockout Protection Open Drain Output Output Short Circuit Protection Dissipation Current1.6mA Dead Time Control0 100% Wide Operating Frequency 10kHz 800kHz range4.0V Configuration General Description AAT1343 provides integrated two-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 channels. Both channel AAT1343 used DC/DC converter operations including step-up, step-down, inverting. 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 Ch-2 individually, dead time control inputs used control operation. With minimum number external components, AAT1343 offers simple cost effective solution.
*Spec subject change without notice this document.
VIEW
NON1 INV1 DTC1 OUT1 Vref NON2 INV2 DTC2 OUT2
TSSOP PACKAGE
Advanced Analog Technology, Inc.
January 2004
AAT1343
Description Name Description External timing capacitance External timing resistance NON1 Positive input error amplifier INV1 Negative input error amplifier Output error amplifier DTC1 Output dead time soft start setting OUT1 Output Ground Power supply OUT2 Output DTC2 Output dead time soft start setting Output error amplifier INV2 Negative input error amplifier NON2 Positive input error amplifier Timer latch setting Vref Reference voltage (2.5V) output
Advanced Analog Technology, Inc.
January 2004
AAT1343
Absolute Maximum Ratings CHARACTERISTICS Supply voltage Input voltage (IN-, DTC) Output voltage SYMBOL VALUE UNIT
+0.3
Output current Operating free-air temperature range Storage temperature range Power dissipation
Tope Tstg
Recommended Operating Conditions
Supply voltage, Input voltage, IN1, Output voltage capacitor resistor (Note Oscillator frequency Output current, Iout1, Iout2 Operating free-air temperature
Symbol
Unit
15000
Tope
Advanced Analog Technology, Inc.
January 2004
AAT1343
Electrical Characteristics, 6.0V (Unless Otherwise Specified) (See Note Oscillator Parameter Test Condition Frequency 220pF,
Unit
Frequency change with
4.0V 14.0V, 220pF,
Under-voltage Protection
Parameter Test Condition Unit
Upper threshold voltage Lower threshold voltage Hysteresis VUPH VUPL
Short Circuit Protection Control
Parameter
VUPH VUPL VHYS
2.23
2.53 0.37
2.83
Test Condition
Unit
Input threshold voltage Short-circuit detect threshold voltage terminal source current Standy Voltage Latch Voltage
Ch-1,
0.95 1.48 -1.5
1.05 1.64 -2.5
1.15 -3.5
VSTB
Note1 Typical values parameters specified
Advanced Analog Technology, Inc.
January 2004
AAT1343
Electrical Characteristics, 6.0V (Unless Otherwise Specified) (See Note (continued) Reference Voltage
Parameter Test Conditions
Unit
Reference voltage Input voltage regulation Output regulation
(Error Amplifier)
Parameter
VREF
-1mA -1mA 4.0V 14.0V -0.1mA -3mA
2.48
2.505
2.53
Test Condition
Input offset voltage Input bias current Input voltage range Open-loop voltage amplification Output voltage swing Output sink current Output source current
Ch-1,2, AV=1 Ch-1,2 Ch-1,2 FB=1.25V FB=1.25V
Unit
±100
Common-mode rejection ratio CMRR
Advanced Analog Technology, Inc.
January 2004
AAT1343
Electrical Characteristics, 6.0V (Unless Otherwise Specified) (See Note (continued) Dead Time Control Parameter Test Condition Unit Input bias current VDTC
Input threshold voltage (DTC)
Duty 10kHz
1.87
1.97
2.07
Vd100 Duty 100%, 10kHz
Latch input voltage Latch mode source current
Output Stage
Parameter Test Condition
1.38 2.28 -200
1.48 2.48 -560
1.58
40µA DTC1,2=0V
Saturation voltage Leakage current
Operating Current
Parameter
VSAT Ipeak
75mACH-1,2 =14.0V
Unit
Test Condition
Supply current
DD-OFF DD-ON
Output "OFF"state =10k
Unit
Advanced Analog Technology, Inc.
January 2004
AAT1343
Function Block Diagram
NON1 INV1
Err-Amp Scpcomp
OUT1
NON2 INV2
Err-Amp Vref
OUT2
DTC1
Vref LATCH
DTC2
UVLO
LATCH
Vref
VREF
Vref
Advanced Analog Technology, Inc.
January 2004
AAT1343
Application Circuit
VREF
option circuit: charge pump circuit
NON1
OUT1
Inverting output
INV1
VREF
AAT1343
Step_up output
OUT2
VREF
NON2
INV2
VREF
DTC1 DTC2
Advanced Analog Technology, Inc.
January 2004
AAT1343
Timing Chart AAT1343
1.97V
1.05V
1.48V
PWMOUTPUT OUTPUT
1.64V
SCPCOMP
2.53V
Lockout free
Advanced Analog Technology, Inc.
January 2004
AAT1343
Package Dimension (Unit: Mil) 16-pin TSSOP
Advanced Analog Technology, Inc.
January 2004
AAT1343
******************** 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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