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Advanced Analog Technology, Inc.
AAT1105A
Details are subject to change without notice.
BUCK_BOOST & BOOST PWM CONTROLLER
Features
Complete PWM Power Control Circuitry CH1: Buck_Boost, CH2: Boost Under-Voltage Lockout (UVLO) Protection Totem Pole Output Output Short Circuit Protection Dead-Time ControlG 0% to 100% Wide Operating FrequencyG 10kHz to 800kHz Shutdown Control Power Good Protection
General Description
The AAT1105A provides an integrated two-channel pulse-width-modulation (PWM) solution for the power supply of DC-DC system. This device offers system engineers the flexibility to tailor-make the power supply circuitry for specific applications. Each channel contains its own error amplifier, PWM comparator, dead-time control (DTC), and output driver. The under-voltage protection, oscillator, short circuit protection (SCP) and voltage reference circuit are the common features for the two channels. The AAT1105A contains one step-up (boost) circuit at channel two (CH2) and one inverting (buck_boost) circuit at channel one (CH1). Dead-time control can be set to provide 0% to 100% dead-time through a resistive divider network. Soft-start can be implemented by paralleling the DTC resistor with a capacitor. Two dead-time control inputs are assigned for CH1 and CH2 individually, and dead-time control inputs can be used to control on / off operation. The compact design and optimized external parts of AAT1105A offers a simple and effective solution.
VDD Range: 2.6V~6.5V
Pin Configuration
TOP VIEW
Ct Rt SHDN IE1 OE1 DTC1 OUT1 GND 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 VREF SCP PGO IE2 OE2 DTC2 OUT2 VDD
(TSSOP-16 PACKAGE)
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Advanced Analog Technology, Inc.
AAT1105A
Pin Description Pin No Name Ct 1
2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Rt SHDN IE1 OE1 DTC1 OUT1 GND VDD OUT2 DTC2 OE2 IE2 PGO SCP VREF
I/O Description - External Timing Capacitance - External Timing Resistance
I I O I O O I O I O O Shutdown Input Pin] Internal Pull "H"^ Inverting Input of Error Amplifier 1 Output for Error Amplifier 1 Output 1 Dead-Time / Soft-Start Setting Output 1 Ground Power Supply Output 2 Output 2 Dead-Time / Soft-Start Setting Output of Error Amplifier 2 Inverting Input of Error Amplifier 2 Power Good Output Pin Timer Latch Setting Reference Voltage (1.293V) Output
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Advanced Analog Technology, Inc.
AAT1105A
Absolute Maximum Ratings CHARACTERISTICS Supply Voltage Input Voltage ( IE - , DTC, SHDN)
Output Voltage Output Current Operating Free-Air Temperature Range Storage Temperature Range Power Dissipation
SYMBOL VDD VI VO
IO TC
Tstorage
VALUE 7 VDD
VDD +0.3
- 120 /+120 - 20 to +85 - 45 to +125
UNIT V V V
mA
o o
C C
Pd
500
mW
Recommended Operating Conditions
Supply Voltage, VDD Input Voltage, IE1, IE2 Output Voltage Oscillator (OSC) Capacitance Oscillator (OSC) Resistance Oscillator (OSC) Frequency Output Current, I out1 , I out 2 Operating Free-Air Temperature
Symbol VDD Vcm
VO C OSC R OSC f OSC IO TC
Min 2.6 0.3
0 100 3 10
- 20
Max 6.5 1.5 VDD
15,000 50 800 +50/ - 50 85
Unit V V
V pF k[ kHz mA
o
C
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Advanced Analog Technology, Inc.
AAT1105A
Electrical Characteristics, VDD = 3.3V (Unless Otherwise Specified) (See Note 1) Oscillator Parameter Test Condition Min Typ C OSC = 220pF, R OSC = f OSC 320 400 Frequency 5.6k[ VDD = 2.6V to 6.0V, TC = 25 oC Frequency Changes with f V 1 VDD C OSC = 220pF, R OSC = 5.6k[ Under-Voltage Protection
Parameter Test Condition Min Typ Max Unit
Max Unit
480 kHz
-
%
Upper Threshold Voltage Lower Threshold Voltage Hysteresis ( VUPH - VUPL )
VUPH VUPL VHYS
TC = 25 C TC = 25 C TC = 25 C
o o
o
1.81 1.57 -
2.03 1.79 0.24
2.25 2.01 -
V V V
Short Circuit Protection Control
Parameter Test Condition Min Typ Max Unit
Input Threshold Voltage Input Threshold Voltage Short-Circuit Detect Threshold Voltage SCP Terminal Source Current Stand-by Voltage Latch Voltage
Vr 2 Vr1 Vtscd I SCP VSTB VLT
CH2 CH1
1.81 0.30 0.76
- 3 .8
1.29 0.37 0.85
- 2 .6
1.40 0.44 0.94
- 1 .4
V V V A mV mV
50 30
100 100
Shutdown Control
Parameter Test Condition Min Typ Max Unit
Shutdown Enable Voltage Shutdown Release Voltage
VSE VSR
TC = 25 C TC = 25 C
o
o
2.0
-
0.5 -
V V
Note 1: Typical values of all parameters are specified at TC =25 oC.
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Advanced Analog Technology, Inc.
AAT1105A
Electrical Characteristics, VDD = 3.3V (Unless Otherwise Specified) (See Note 1) (Cont.) Reference Voltage
Parameter Test Conditions Min
o
Typ
Max
Unit
Internal Reference Voltage Reference Voltage Input Voltage Regulation Output Regulation
VREFi VREF VRI VRO
I REF = -1mA , TC = 25 C I REF = -1mA , TC = 25 oC I REF = -1mA , VDD = 2.6V to 6.0V I REF = -0.1mA to - 1 mA
0.622 0.641 0.660 V 1.280 1.293 1.306 1 1 10 6 mV mV
EA (Error Amplifier)
Parameter Test Condition
Min
0.5 70 1.7 -
Typ
15 85 2.0 0.2 10
- 65
Max Unit
6 100 1.5 0.4 - 45
Input Offset Voltage Input Bias Current Input Voltage Range Open-Loop Voltage Amplification Output Voltage Swing Output Sink Current Output Source Current Common-Mode Rejection Ratio
VIO I IB VIR A VO VOS+ VOS- I OS+ I OS- CMRR
CH1,CH2, Unity Gain CH1, CH2 CH1, CH2
mV nA V dB V mA A dB
OE=0.65V OE=0.65V
3 60
80
-
PRDB (Power Good Protection)
Parameter Test Condition
Min
-
Typ
0.2
Max Unit
0.4 V
Low Level Output Voltage
Vdbl
Pull-High R 20 = 100k
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Advanced Analog Technology, Inc.
AAT1105A
Electrical Characteristics, VDD = 3.3V (Unless Otherwise Specified) (See Note 1) (Cont.) Dead Time Control & PWM Parameter Test Condition Min Typ Max Unit I IB VDTC = 1.0V Input Bias Current 0.1 1.0 A
Input Threshold (DTC1) Input Threshold (DTC2) Voltage
V1d 0 V1d100
Duty = 0%, f OSC = 10kHz Duty = 100%, f OSC = 10kHz Duty = 0%, f OSC = 10kHz Duty = 100%, f OSC = 10kHz I DTC = 20A I DTC = 50A DTC1=1.08V DTC2=0.48V
0.92 0.48 0.48 0.92 1.15 150
1.00 0.56 0.56 1.00 1.20 0.2
- 45
1.08 0.64 0.64 1.08 0.4
- 30
V
Voltage
V2d 0 V2d100 V1DTC V2 DTC I1DTC I 2 DTC
V V V A A
Latch Input Voltage (DTC1) Latch Input Voltage (DTC2) Latch Mode Source Current (DTC1) Latch Mode Source Current (DTC2)
200
-
Output Stage
Parameter Test Condition
High-Level Output Voltage Low-Level Output Voltage Rise Time Fail Time Leakage Current Capacitance at the Output Pin
VOH VOL t RISE t FALL I LEAK CL
I O = - 50 mA I O =+50mA C L =1,000pF C L =1,000pF VO =6.0V
Min 1.8
-
Typ 2.2
0.8 100 100 -
Max Unit V
1.2 5 V ns ns A
Operating Current
Parameter Test Condition
Min
-
Typ
1.8 2.0
Supply Current
I DD-OFF I DD-ON
Output "OFF" State R OSC = 10k
Max Unit mA mA
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Advanced Analog Technology, Inc.
AAT1105A
Block Diagram
OE1 IE1
VDD Vr1 VREFi 1.233V Err-Amp SCP Comp PWM
OUT1
GND
Vr2 UVC VREFi 1.233V VDD
IE2 OE2
Err-Amp PWM VREF UVC
OUT2
Ct
DTC1 OSC DTC2
UVC UVC LATCH VDD LATCH
Rt
UVLO
VDD PGO
SCP SCP
UVC VREF
SHDN
VREF
VREF
SHUTDOWN CONTROL
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Advanced Analog Technology, Inc.
AAT1105A
Application Circuit 1
VDD
C11
U1 VDD
VN1 C1 R5
PGO OUT1
Q1 D1 L1 C9
OE1
R1 R2
VN1
IE1
VREF VP2 C2 R6
AAT1105A
OE2
L2
R3
IE2
R4
Q2
D2 C10
VP2
OUT2 SHDN SHDN VREF
Ct
R7
R9
C5
C20
DTC1 Rt
DTC2
C4 R8 R10
GND
Ct Rt
SCP
CSCP
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Advanced Analog Technology, Inc.
AAT1105A
Application Circuit 2
Optional Circuit 3: for power good protection
VDD
R20
PGO
Q3 C11
Optional Circuit: Positive charge pump circuit
U1 VDD
VN1 R5
VP3
D4 Q1 D1 L1 C9
PGO OUT1
OE1
R1 R2 C1
VN1
C8
D3
C7 PGO R12 R11 Q4
IE1
VREF VP2 R6
AAT1105
L2
OE2
R3 C2
IE2
R4
D2 Q2
VP2
Optional Circuit 2: for Vp3 discharge
OUT2 SHDN SHDN
C13
C10
VREF Ct DTC1 Rt DTC2
C4 R8 R10 R7 R9 C5 C20 D6 D5 C14
VN2
Optional Circuit : Negative charge pump circuit
GND
Ct Rt
SCP
CSCP
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Advanced Analog Technology, Inc.
AAT1105A
Buck-Boost] Inverting^ Timing Chart ] CH1^
1.0V
OE DTC
0.37V
0.56V
PWM OUTPUT OUTPUT
0.85V
SCP
tSCP
SCP COMP
2.03V
VDD
LOCKOUT FREE
PGO
Note:
t SCP
C SCP Vr 2 I SCP
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Advanced Analog Technology, Inc.
AAT1105A
Boost ] Step-up^ Timing Chart ] CH-2^
1.29V 1.0V
DTC OE
0.56V
PWM OUTPUT
OUTPUT
0.85 V
SCP
tSCP
SCP COMP
2.03V
VDD
LOCKOUT FREE
PGO
Note:
t SCP
C SCP Vr 2 I SCP
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Advanced Analog Technology, Inc.
AAT1105A
Package Dimension
16-Pin TSSOP
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Advanced Analog Technology, Inc.
AAT1105A
Package Dimension (Cont.)
SYMBOLS A A1 A2 b C D E E1 e L y
DIMENSIONS IN MILLIMETERS MIN 1.05 0.05 -----0.20 -----4.900 6.20 4.30 -----0.50 -----TYP 1.10 0.10 1.00 0.25 0.127 5.075 6.40 4.40 0.65 0.60 -----MAX 1.20 0.15 1.05 0.28 -----5.100 6.60 4.50 -----0.70 0.076
DEMINSIONS IN INCHES MIN 0.041 0.002 -----0.008 -----0.1930 0.244 0.170 -----0.020 -----TYP 0.043 0.004 0.039 0.010 0.005 0.1998 0.252 0.173 0.026 0.024 -----MAX 0.047 0.006 0.041 0.011 -----0.2000 0.260 0.177 -----0.028 0.003
0
o
4
o
8
o
0
o
4
o
8o
NOTE: 1. CONTROLLING DIMENSION: MILLIMETERS 2. LEAD FRAME MATERIAL: OLIN C7025/EFTEC 64T 3. DIMENSION "D" DOES NOT INCLUDE MOLD FLASH, TIE BAR BURRS AND GATE BURRS. MOLD FLASH, TIE BAR BURRS AND GATE BURRS SHALL NOT EXCEED 0.006" [0.15 MILLIMETERS] PER END. DIMENSION "E1" DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" [0.25 MILLIMETERS] PER SIDE. 4. DIMENSION "b" DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE 0.003" [0.08 MILLIMETERS] TOTAL IN EXCESS OF THE "b" DIMENSION AT MAXIMUM MATERIAL CONDITION. DAMBAR CANNOT BE LOCATED ON THE LOWER RADIUS OR THE FOOT. MINIMUM SPACE BETWEEN PROTRUSION AND AN ADJACENT LEAD TO BE 0.0028" [0.07 MILLIMETERS]. 5. TOLERANCE: 0.010 [0.25 MILLIMETERS] UNLESS OTHERWISE SPECIFIED. 6. OTHERWISE DIMENSION FOLLOW ACCEPTABLE SPEC. 7. REFERENCE DOCUMENT: JEDEC SPEC MO-153.
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Advanced Analog Technology, Inc.
AAT1105A
Tape and Reel
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Advanced Analog Technology, Inc.
AAT1105A
Tape and Reel (Cont.)
NOTE: 1. 2. 3. 4. 5. 6.
10 SPROCKET HOLE PITCH CUMULATIVE TOLERANCE 0.2 MILLIMETERS. CAMBER NOT TO EXCEED 1 MILLIMETER IN 100 MILLIMETERS. MATERIAL: ANTI-STATIC BLACK ADVANTEK POLYSTYRENE. A 0 AND B 0 MEASURED ON A PLANE 0.3 MILLIMETERS ABOVE THE BOTTOM OF THE POCKET. K 0 MEASURED FROM A PLANE ON THE INSIDE BOTTOM OF THE POCKET TO THE TOP SURFACE OF THE CARRIER. POCKET POSITION RELATIVE TO SPROCKET HOLE MEASURED AS TRUE POSITION OF POCKET, NOT POCKET HOLE.
Part Marking
TSSOP16 Top Marking
AAT1105A XXXXXX
TSSOP16 Back Marking
YYWW
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Advanced Analog Technology, Inc.
AAT1105A
Ordering Information
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