Preliminary Provisional BUCK_BOOST BOOST CONTROLLER WITH ADJUSTAB
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AAT1107
Preliminary Provisional
BUCK_BOOST BOOST CONTROLLER WITH ADJUSTABLE
Features Complete Power Control Circuitry CH-1: buck_boost, CH-2: boost Adjustable Regulator Under-voltage Lockout Protection Totem pole Output Output Short Circuit Protection Dead Time Control0 100% Wide Operating Frequency 10kHz 800kHz
General Description
AAT1107 series 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. AAT1107 contains step-up (boost) circuit (CH-2) inverting (buck_boost) circuit (CH-1). 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. maximum output currents regulator enlarging connect N_MOS bipolar) source follow stage out3 pin.
*Spec subject change without notice this document.
Configuration
VIEW
INV3 INV1 DTC1 OUT1 Vref OUT3 INV2 DTC2 OUT2
(TSSOP-16 PACKAGE)
Advanced Analog Technology, Inc.
January 2004
AAT1107
Description Name
INV3 INV1 DTC1 OUT1 OUT2 DTC2 INV2 OUT3 Vref
External timing capacitance External timing resistance Negative input amplifier
Description
Negative input error amplifier Output error amplifier Output dead time soft start setting Output Ground Power supply Output Output dead time soft start setting Output error amplifier Negative input error amplifier output Timer latch setting Reference voltage (2.505V) output
Advanced Analog Technology, Inc.
January 2004
AAT1107
Absolute Maximum Ratings CHARACTERISTICS Supply voltage Input voltage (IN-, DTC) Output voltage
Output current Operating free-air temperature range Storage temperature range Power dissipation
SYMBOL
Tope Tstg
VALUE
+0.3 -120/+120
UNIT
Recommended Operating Conditions
Supply voltage, Input voltage, INV1, INV2, INV3 Output voltage capacitor resistor (Note Oscillator frequency Output current, Iout1, Iout2 Output current, Iout3 Operating free-air temperature
Symbol
15000 +50/-50
Unit
Tope
Advanced Analog Technology, Inc.
January 2004
AAT1107
Electrical Characteristics, 5.0V (Unless Otherwise Specified) (See Note Oscillator Parameter Test Condition Frequency 220pF,
Frequency change with 4.0V 6.0V, 220pF,
Unit
Under-voltage Protection
Parameter Test Condition Unit
Upper threshold voltage Lower threshold voltage Hysteresis VUPH VUPL
VUPH VUPL VHYS
2.23
2.53 0.37
2.83
Short Circuit Protection Control
Parameter Test Condition Unit
Input threshold voltage Input threshold voltage Short-circuit detect threshold voltage terminal source current Standy Voltage Latch Voltage
Ch-2 Ch-1
0.95 1.48 -1.5
1.05 1.64 -2.5
2.65 1.15 -3.5
VSTB
Note1 Typical values parameters specified
Advanced Analog Technology, Inc.
January 2004
AAT1107
Electrical Characteristics, 5.0V (Unless Otherwise Specified) (See Note (continued) Reference Voltage
Parameter Test Conditions
Unit
Internal reference Voltage Reference voltage Input voltage regulation Output regulation
Vrefi
-1mA 1.220 -1mA -1mA 4.0V 6.0V -0.1mA -1mA
1.233 1.246
VREF
2.430 2.505 2.580
(Error Amplifier)
Parameter 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
AAT1107
Electrical Characteristics, 5.0V (Unless Otherwise Specified) (See Note (continued) Dead Time Control Parameter Test Condition Unit Input bias current VDTC
Input threshold voltage (DTC1) Input threshold voltage (DTC2) Latch input voltage (DTC1) Latch input voltage (DTC2) Latch mode source current (DTC1) Latch mode source current (DTC2)
Duty 10kHz V1d100 Duty 100%,
10kHz V2d0 V2d100 V1DT V2DT I1DT I2DT Duty 10kHz Duty 100%, 10kHz 40µA 100µA DTC1=0V DTC2=2.0V
1.87 1.38 1.38 1.87 2.28 -200
1.97 1.48 1.48 1.97 2.48 -560
2.07 1.58 1.58 2.07
Output Stage
Parameter Test Condition
High-level output voltage Low-level output voltage Rise time Fail time Leakage current
Trise Tfail Ipeak
IO=-50mA IO=+50mA CL=1000pF CL=1000pF =6.0V
Unit
Parameter Test Condition
Output voltage Line Regulation Load Regulation
VDD=5V,Vout3=3.3V VDD=4V~6.5V, Iout3=10mA Iout3=1mA~30mA
3.17
0.08
Unit 3.43
Operating Current
Parameter Test Condition
Supply current
DD-OFF DD-ON
Output "OFF"state =10k
Unit
Advanced Analog Technology, Inc.
January 2004
AAT1107
Function Block Diagram
INV1
Vrefi 1.233V
Err-Amp
Scpcomp
OUT1
Vrefi 1.233V
INV2
Err-Amp Vref
OUT2
DTC1 DTC2
LATCH LATCH
UVLO
INV3 OUT3
Vrefi 1.233V Vref
VREF
Vref
Advanced Analog Technology, Inc.
January 2004
AAT1107
Application Circuit
OUT1
INV1
VREF
AAT1107
OUT2 OUT3
INV2
INV3
VREF
DTC1 DTC2
Advanced Analog Technology, Inc.
January 2004
AAT1107
Application Circuit
option circuit: Positive charge pump circuit
OUT1
INV1
VREF
AAT1107
OUT2 OUT3
INV2
INV3 VREF
DTC1 DTC2
option circuit: enlarge output current option circuit Negative charge pump circuit
Advanced Analog Technology, Inc.
January 2004
AAT1107
Buck-BoostInverting Timing Chart
1.97V
1.05V
1.48V
PWMOUTPUT OUTPUT
1.64V
SCPCOMP
2.53V
Lockout free
Advanced Analog Technology, Inc.
January 2004
AAT1107
Boost Step-upTiming Chart CH-2
2.4V 1.97V
1.48V
PWMOUTPUT
OUTPUT
1.64V
SCPCOMP
2.53V
Lockout free
Advanced Analog Technology, Inc.
January 2004
AAT1107
Package Dimension (Unit: Mil)
Advanced Analog Technology, Inc.
January 2004
AAT1107
******************** 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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